Method of production of aqueous dispersions

FIELD: chemistry.

SUBSTANCE: invention refers to technology of hull-kernel particles which can be used to modify impact strength of poly(met)akrylate moulding compositions. According to method a) water and emulsifier b) are added with 25.0 to 45.0 mass fractions of the first composition containing A) alkylmetacrylate 50.0 to 99.9 mass fractions, B) alkylakrylate 0.0 to 40 mass fractions, C) cohesive monomers 0.1 to 10.0 mass fractions, and D) styrene monomers 0.0 to 8.0 mass fractions, and polymerised, c) added 35.0 to 55.0 mass fractions of the second composition containing E) (met)akrylates 80.0 to 100.0 mass fractions, F) cohesive monomers 0.05 to 10.0 mass fractions, and G) styrene monomers 0.0 to 20.0 mass fractions, and polymerised, d) added 10.0 to 30.0 mass fractions of the third composition containing H) alkylmetakrylates 50.0 to 100.0 mass fractions I) alkylakrylates 0.0 to 40.0 mass fractions and J) styrene monomers 0.0 to 10.0 mass fractions, and polymerised. Method is distinctive in that e) each polymerisation cycle is performed at temperature within 60 to 90°C and f) fractional content of all substances is selected so that total weight A) to J) per total weight of aqueous dispersion exceeds 50.0 mass %. Presented method is used to produce impact strength modifiers minimum content of which provides sufficient improvement of impact strength when tested on cut moulding composition samples, not degrading at the same time other important properties of moulding composition.

EFFECT: production of impact strength modifiers minimum content of which provides sufficient improvement of impact strength when tested on cut moulding composition samples, not degrading at the same time other important properties of moulding composition.

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The present invention relates to a method for producing aqueous dispersions. In particular, the invention relates to a method for producing a water dispersion of a nuclear-shell particles, which can be used to modify the impact strength of poly(meth)acrylate moulding masses.

It has long been known that the impact strength of the moulding mass, in particular poly(meth)acrylate moulding masses, can be improved by adding molding to the mass of a certain number of so-called modifiers toughness. This technique became widespread use of nuclear-shell particles and/or particles from the nucleus with a double shell. In General they include elastomeric phase, and in the nuclear shell structure, the elastomer phase is often the core, and in the structure of nuclei with double-shell elastomer phase is usually represented by a shell grafted to the core.

So, for example, U.S. patent No. 3793402 refers to adambakkam moulding masses, in particular poly(meth)acrylate-based, which contain from 90 to 4 wt.% multilayer nuclear-shell particles with a solid core, an elastomeric first shell and a solid second shell. Typical main components of the core and the second shell presents alkyl methacrylates with the number of carbon atoms in the alkyl osticket one to four, in particular methyl methacrylate. The first shell consists mainly of butadiene, substituted butadiene and/or alkylacrylate with the number of carbon atoms in the alkyl residue of from one to eight. However, it may also contain from 0 to 49.9%by weight, in particular from 0.5 to 30 wt.%, such copolymerizate Monomeric structural units, such as copolymerizate Monomeric structural units with one ethylene unsaturated bond. However, in accordance with U.S. patent No. 3793402 particular preference is given to the presence of from 10 to 25 wt.% copolymerizate Monomeric structural units with one ethylene unsaturated bond, in particular styrene.

The overall diameter of the nuclear shell particles is in the range from 100 to 300 nm.

The nuclear-shell particles is performed using a multi-stage emulsion polymerization using such thermal initiators, as persulfates or redox initiating system. When this polymerization should be carried out in the temperature range from 0 to 125°With, in particular in the range from 30 to 95°C.

Similarly, in the application for the Federal Republic of Germany patent No. 4121652 A1 describes the modifiers for toughness for such thermoplastic plastics, as polymethylmethacrylate, consisting of at least one phase of the product emulsion polymer is then, contains

A) a solid core of the product with mesh molecular structure derived Homo - or copolymerization of polymerizable by a radical mechanism monomers with ethylene unsaturated bonds,

B) obtained in the presence of nuclear material elastomer phase having a glass transition temperature of not more than 10°consisting of

a) Olkiluoto ester of acrylic acid with the number of carbon atoms in the alkyl residue of from 1 to 8

b) at least one forming intermolecular bonds of co monomer with two or more polymerizable double bonds in the molecule,

C) arylalkyl-acrylate or-methacrylate,

g) solid phase obtained in the presence of the elastomeric phase of the product Homo - or copolymerization of polymerizable by a radical mechanism monomers with ethylene unsaturated bonds with the glass transition temperature of not less than 50°C.

In this publication is given as an example of the molding mass (example 3), showing at room temperature impact strength (Izod) at the sample with the cut, equal to 6.2 kJ/m at -10° - 4,7 kJ/m and at -20°is 3.7 kJ/m Vicat-softening temperature of the molding material is 97°C.

The nuclear-shell particles are also carried out by using a multistage emulsion polymerization, using the as the initiator of peroxodisulfate alkali metal or ammonium, and conducting the polymerization in the temperature range from 20 to 100°With, for example, at 50°C.

Application for the Federal Republic of Germany patent No. 4136993 A1 relates to modified on the impact strength of the moulding masses, which contain from 10 to 96 wt.% the product of polymerization on the basis of polymethylmethacrylate and from 4 to 90 wt.% multistage particles from the nucleus with a double shell, and for receiving the core and the second shell in each individual case, a mixture of monomers containing mostly methyl methacrylate. The mixture of monomers for the first shell comprises from 60 to 89.99 wt.% alilovic esters of acrylic acid with the number of carbon atoms in the alkyl residues from one to twenty and/or cycloalkylation with the number of carbon atoms in cycloalkyl residues from five to eight and includes from 10 to 39,99 wt.% phenyl-alilovic esters of acrylic acid with the number of carbon atoms in the alkyl residues from one to four, and may also include other components. The average particle diameter of the core with dual sheath is in the range from 50 to 1000 nm, in particular in the range from 150 to 400 nm.

In accordance with this publication, the nuclear shell particles get multistage seed latex method, in which as the initiators use peroxodisulfate ammonium or alkali metals, such as peroxodisulfate Kali is, or combined systems initiators, and in the case of thermally activated peroxodisulfate ammonium and alkali metals, the polymerization temperature should lie in the range from 50 to 100°C.

In the application for European patent No. 0828772 B1 describes a modification of the toughness of poly(meth)acrylates using multistage nuclear-shell particles, which consist of a core, the first shell and, in some cases, the second shell, and which do not contain vinyl unsaturated compounds with at least two double bonds with the same reactivity. The nucleus contains the original (meth)acrylate polymer. The first sheath comprises a polymer with a low glass transition temperature, which ranges from 0 to 25 wt.%, in particular from 5 to 26 wt.% styrene monomer, and from 75 to 100 wt.% (meth)acrylate monomer which forms a homopolymer with a glass transition temperature from -75 -5°C. a Second shell, if it exists, contains the second (meth)acrylate polymer, which may correspond to the first (meth)acrylate polymer or it may differ. The overall diameter of the nuclear shell particles is in the range from 250 to 320 nm.

The nuclear-shell particles and in this case occurs when a multi-stage emulsion polymerization at 80°and as an initiator using the potassium persulfate.

Most often for nuclear-shell particles using the above methods, but they all have the drawback consisting in that the polymerization must be performed at a rather low, i.e. not in excess of 50.0 wt.%, the concentration of monomer in order to obtain the desired particle size with a narrow distribution of particle size. In contrast, polymerization at high concentrations of monomer leads to greater dispersion in the distribution of particle size and the formation of large quantities of coagulate, which significantly affects the properties of nuclear material-shell particles.

In practical use, in particular for modifying the impact strength of the moulding mass, nuclear-shell particles can not be used in the form of an aqueous dispersion, they have to select from the aqueous dispersion. As a result of this low solids content in the aqueous dispersion has a direct impact negatively on the possible application of the above nuclear-shell particles, because of their separation requires a large consumption of energy and other resources. In accordance with the foregoing there is a need for more efficient ways of producing nuclear-shell particles.

To modify the impact strength of the moulding masses outfit is with a food emulsion polymerization in some cases we also used the products of the suspension polymerization. These include, for example, rubber having grafted polymethylmethacrylate, relatively finely distributed in the matrix of the molding material, for example, polymethylmethacrylate. The elastomeric phase consists of the product of copolymerization with mesh molecular structure with a low glass transition temperature, below 25°, which typically contains as main components alkylacrylate structural units with the number of carbon atoms in the alkyl residues from one to eight, in particular butyl acrylate structural unit. In some cases, as a viscous phase are also used polybutadiene or copolymers of butadiene.

Although through the use of the above modifiers toughness can be achieved marked improvement in toughness specimens with notch, this improvement is still not fully meets the requirements of many applications. Thus, in particular, to modify the impact strength at room temperature (23° (C) require a relatively large number of these modifiers toughness, which in turn leads to a significant deterioration of other important practical applications of the properties of the molding composition, in particular the modulus of elasticity, melt viscosity, Vicat-temperature and ability to elongate.

In accordance with this technique, the need is raised in the modifiers toughness when small amounts of modifiers toughness lead to sufficient improvement of impact strength on samples of the molding material with the cut, in particular, at room temperature, without compromising at the same time other important properties of the molding composition, in particular, the modulus of elasticity, melt viscosity, Vicat-temperature and ability to elongate. When this molding composition should have toughness specimens with notch on Charpy (ISO 179) at 23°in the preferred case, at least equal to 6.0 kJ/m2and at -10°in the preferred case, at least 2.5 kJ/m2the modulus of elasticity (ISO 527-2) in the preferred case of more than 1500 MPa, blushing according to ASTM D 1003 (1997) in the preferred case, not more than 2.5%, the viscosity of the melt in the preferred case, more than 2000 PA·and preferably not more than 4,500 PA·, Vicat a softening temperature in the preferred case, at least 85°S, preferably not less than 93°With transmission (D 65/10°) according to DIN 5033/5036 in the preferred case, not less than 88.5%of and the ability to extrude in the preferred case in the range from 0 to 20%.

Whereas the prior art, the present invention was to develop a toughness modifiers for molding masses, in particular poly(meth)acrylate moulding masses, which is s help to improve the impact strength of the sample cut from the molding masses, in particular at room temperature, without giving effect to deterioration in other important practical applications of the properties of the molding composition, in particular the modulus of elasticity, melt viscosity, Vicat-temperature and the ability of the sample to the extrusion. While the molding material must in your case to have the impact strength of the sample with a cut on Charpy (ISO 179) at 23°not below 6.0 kJ/m2and at -10°in the preferred case not less than 2.5 kJ/m2the modulus of elasticity (ISO 527-2) in the preferred case of more than 1500 MPa, blushing according to ASTM D 1003 (1997) in the preferred case, not more than 2.5%, the viscosity of the melt in the preferred case, more than 2000 PA·and preferably not more than 4,500 PA·, Vicat a softening temperature in the preferred case, at least 85°C, preferably at least 90°With, in particular not less than 93°With transmission (D 65/10°) according to DIN 5033/5036 in the preferred case, not less than 88.5 percent, as well as the ability to extrude in the preferred case in the range from 0 to 20%.

Another objective of the present invention was to develop an effective method of obtaining nuclear-shell particles, which, in particular, allows less time-consuming allocation nuclear-shell particles.

The present invention was also to outline a way of gaining the nuclear-shell particles which can be easily and with a small investment implemented on an industrial scale.

In addition, based on the present invention was the development of ways to obtain nuclear-shell particles with a narrower size distribution of particles, in the preferred case, with a value of U80less 0,22.

The present invention consisted in the detection method of producing nuclear-shell particles, which is formed as small as possible, in the preferred case less than 5.0 wt.%, the coagulate.

In addition, another objective of the present invention was to provide a method of obtaining a nuclear-shell particles with radius, as measured by Coulter, ranging from 150,0 to less 250,0 nm. Because these nuclear-shell particles are best suited for modifying the impact strength of the moulding mass, in particular polyalkyl(meth)acrylate moulding masses.

These tasks, as well as others not specifically mentioned tasks, which, however, easily are derived as discussed in the introductory part of the relationship, are solved by the method of obtaining a water dispersion with all the characteristics given in claim 1 of the claims. Viable options corresponding to the invention of the method of implementation is protected by subparagraphs referencing to claim 1. From what oasisa to the product 11 is designed to protect the information derived from this method nuclear-shell particles. In addition, the invention relates to modified for toughness of poly(meth)acrylate moulding masses that contain related to the invention of nuclear-shell particles, as well as preferred areas of application of the molding masses.

Due to the fact that it was developed a method of obtaining a water dispersion, according to which

a) take water and emulsifier,

b) add from 25.0 to 45.0 parts by weight of the first composition containing

A) to 50.0 to 99.9 parts by weight based on In different alkyl methacrylates with the number of carbon atoms in the alkyl residue of from one to twenty,

B) from 0.0 to 40 parts by mass based on In different alkylacrylate with the number of carbon atoms in the alkyl residue of from one to twenty,

C) from 0.1 to 10.0 parts by weight of the monomers forming intermolecular bonds,

and

D) from 0.0 to 8.0 parts by mass of styrene monomers of the General formula (I)

moreover, the remains of R1to R5in each case, independently of one another mean a hydrogen atom, halogen, alkyl group with carbon atoms of from one to six or alkenylphenol group with the number of carbon atoms from two to six and the remainder R6means a hydrogen atom or alkyl group with carbon atoms of from one to six,

and polymerize the degree of conversion of not less than 85,0 wt.% based on the total weight of component a), B), C) and D),

C) add from 35.0 to 55.0 parts by weight of the second composition containing

D) from 80,0 to 100.0 parts by mass of the (meth)acrylate,

E) from 0.05 to 10.0 parts by weight of the monomers forming intermolecular bonds, and

W) from 0.0 to 20.0 parts by mass of styrene monomers of the General formula (I),

and polimerizuet to the degree of conversion is not less 85,0 wt.% based on the total weight of component D), (E) and (F),

g) added from 10.0 to 30.0 parts by weight of the third composition containing

C) from to 50.0 to 100.0 parts by mass of alkyl methacrylates with the number of carbon atoms in the alkyl residue of from one to twenty,

S) from 0.0 to 40.0 parts by mass of alkylacrylate with the number of carbon atoms in the alkyl residue of from one to twenty and

K) from 0.0 to 10.0 parts by weight of styrene monomers of the General formula (I),

and polimerizuet to the degree of conversion is not less 85,0 wt.% based on the total weight of component 3), And)),

the part weight compounds b), C) and d) add up to 100.0 parts by mass, and

the method differs in that

d) each polymerization is carried out in the temperature range from more than 60°to 90°and

e) the relative content of all substances is chosen such that the total weight of component a) to K) based on the total weight of the aqueous dispersion was more to 50.0 wt.%,

possible way that it was easy to imagine Zara is it to make available a method that allows efficient retrieval of nuclear-shell particles in aqueous dispersion. In this case, due to the high content of solids in the aqueous dispersion is considerably facilitated the allocation of nuclear-shell particles compared with commonly used methods.

In addition, as a result of the invention, a method of conducting the process is achieved by a number of other advantages. To him, along with others, are listed further advantages:

→ the Possibility of implementing the invention of the method on an industrial scale with a small investment without any complications.

→ Obtained using the corresponding the invention, a method of nuclear-shell particles have a narrow distribution of particle size in the preferred case, with a value of U80less 0,22.

→ the Formation of coagulate when implementing the invention method is almost completely suppressed.

→ In particular, corresponding to the invention the method is used to obtain nuclear-shell particles with a particle radius of a certain way of Coulter, ranging from 150,0 to less 250,0 nm.

→ as a result of the invention of the method are the means of modifying the impact strength of the moulding mass, h is particularly poly(meth)acrilate molding masses, which makes it possible to improve the impact strength of the moulding mass in the sample with a notch, in particular at room temperature, without giving effect to deterioration in other important practical applications of the properties of the molding composition, in particular the modulus of elasticity, melt viscosity, Vicat-temperature, and extrusion. A particularly successful relevant to the invention the molding material have toughness on the sample with a cut on Charpy (ISO 179) at 23°in the preferred case not below 6.0 kJ/m2and at -10°in the preferred case not less than 2.5 kJ/m2the modulus of elasticity (ISO 527-2) in the preferred case of more than 1500 MPa, blushing according to ASTM D 1003 (1997) in the preferred case, not more than 2.5%, the viscosity of the melt in the preferred case, more than 2000 PA·and preferably not more than 4,500 PA·, Vicat a softening temperature in the preferred case, at least 85°With, in the preferred case, at least 90°S, preferably not less than 93°With transmission (D 65/10°) according to DIN 5033/5036 in the preferred case, not less than 88.5 percent, as well as the ability to extrude in the preferred case in the range from 0 to 20%.

→ Thanks to the application corresponding to the invention of nuclear-shell particles become available molding material with markedly improved the performance impact of viscosity on the sample with a notch, in particular at low temperatures, below 0°at best it is a molding material with toughness on the sample with a notched Izod in accordance with ISO 180 at least 3.5 kJ/m2at -10°C.

→ In comparison with usual modifiers toughness to obtain molding masses with comparable indicators toughness specimens with notch at room temperature, in particular at 23°With, quite noticeably smaller quantities corresponding to the invention of nuclear-shell particles.

→ Molding material with a modified accordingly to the invention by way of toughness differ markedly improved properties at room temperature, in particular at 23°C. It determines their use at these temperatures, in particular in the temperature range from 0 to 50°C.

In accordance with the present invention is obtaining a water dispersion method, which is based on water and emulsifier. By downloading take in the preferred case from 90,00 to 99.99 parts by weight of water and from 0.01 to 10.00 parts by weight of emulsifier, and these parts of the mass in the optimal case total 100.00 parts of the mass.

Then this download is sequentially added in the following order:

b) from 25.0 to 45.0 parts by weight of the first composition and others who drive the polymerization to a conversion of at least 85 wt.%, in the preferred case, not less than 90.0 wt.%, in a more preferred case, not less than 95,0%by weight, in particular at least 99 wt.%, in each case based on the total weight of component a), B), C) and D);

in) from 35.0 to 55.0 parts by weight of the second composition, and conducting polymerization to a conversion of at least 85 wt.%, in the preferred case, not less than 90.0 wt.%, in a more preferred case, not less than 95,0%by weight, in particular at least 99 wt.%, in each case based on the total weight of component D), (E) and (F);

g) from 10.0 to 30.0 parts by weight of the third composition, and conducting polymerization to a conversion of at least 85 wt.%, in the preferred case, not less than 90.0 wt.%, in a more preferred case, not less than 95,0%by weight, in particular at least 99 wt.%, in each case based on the total weight of component G), (H) and K);

moreover, these parts of the mass to a total of 100.0 parts of the mass.

The concept of polymers in essence, the present invention relates to compounds, which are compared with each reference compound from A) to C), the so-called monomer are at least ten times the molecular weight.

Monitoring the progress of the polymerization reaction at each stage can be carried out by known methods, for example gravimetrically or by using gas chromatography.

The first composition contains

A) to 50.0 to 99.9 parts by weight, in Celje is obrazem case is 60.0 to 99.9 parts by mass, in the preferred case of 75.0 to 99.9 parts by weight, in particular from 85.0 to 99.5 parts by mass of alkyl methacrylates with the number of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in particular from one to eight;

B) from 0.0 to 40 parts by mass, in the preferred case from 0.0 to 24.9 parts by weight, in particular from 0.1 to 14.9 parts by weight of alkylacrylate with the number of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in particular from one to eight;

B) from 0.1 to 10.0 parts by mass, in the preferred case from 0.1 to 5.0 parts by weight, in particular from 0.1 to 2.0 parts by weight, of monomers that form intermolecular bonds, and

D) from 0.0 to 8.0 parts by mass of styrene monomers of the General formula (I)

moreover, these parts of the mass to a total of 100.0 parts of the mass.

Of course, the compounds A), B), C) and D) are different from each other, in particular the compounds a) and B) do not include the monomers)forming intermolecular bonds.

The remains of R1to R5in each case, independently of one another mean a hydrogen atom, halogen, in particular fluorine atoms, chlorine or bromine, or alkyl group with carbon atoms of from one to six, in the preferred case, the mean atom odor is Yes. The remainder R6means a hydrogen atom or alkyl group with carbon atoms of from one to six, in the preferred case of the hydrogen atom. The most suitable alkyl groups with carbon atoms of from one to six are methyl, ethyl, n-sawn, ISO-propyl, n-bucilina, second-bucilina, tert-bucilina, n-pencilina, n-exilda group, and cyclopentenone and tsiklogeksilnogo group.

At the same time, the number of styrene monomers of the General formula (I) include styrene, substituted styrene with one alkyl substituent in the side chain, for example α-methylsterol and α-atillery, substituted styrene with one alkyl substituent in the ring, such as vinyltoluene and n-methylsterol, halogen-substituted styrene, such as monoliteral, dichlorostyrene, dibromostyrene and cerebrosterol.

Among the above-mentioned alkyl methacrylates (A) are esters of methacrylic acid such as methyl methacrylate, ethyl methacrylate, propylbetaine, isopropylacetate, n-butylmethacrylate, second-butylmethacrylate, tert-butylmethacrylate, intermetallic, vexillarius, gettimeformat, octylacrylate, 2-octylacrylate, ethylhexylacrylate, nonillicit, 2-meteoclimatic, 2-tert-BUTYLCARBAMATE, 3-isopropylaminomethyl, decylmethacrylate, undecylenate is at, 5-methylumbelliferyl, dodecylmercaptan, 2-metallodielectric, tridecylamine, 5-methyltrichlorosilane, tetradecylammonium, pentadecylcatechol, hexadecimalscalar, 2-methylhexadecanoic, heptadecologies, 5-isopropylideneglycerol, 5-etilachetoachetate, octadecylammonium, nondecimated, acetilsalicilic, such cycloalkylation, such as cyclopentylmethyl, cyclohexylmethyl, 3-vinyl-2-butyl-cyclohexylmethyl, cycloheptylmethyl, cyclooctylmethyl, bornilacetate and isobornylacrylat.

In accordance with the most preferred implementation of the present invention, the first composition contains at least 50 wt.%, in the appropriate case, not less than 60 wt.%, in the preferred case, at least 75 wt.%, in particular at least 85 wt.% of methyl methacrylate based on the total weight of component a) to G).

Among the above-mentioned alkylacrylate (B) are esters of acrylic acid such as methyl acrylate, acrylate, propylacetate, isopropylacetate, n-butyl acrylate, sec-butyl acrylate, tert-butyl acrylate, pentylaniline, hexidecimal, heptylamine, octylacrylate, 2-octylacrylate, hexyl acrylate, nasolacrimal, 2-methylanthranilate, 2-tert-butylcatechol, 3-isopropylaniline, dellaquila, under lakelet, 5-methylundecanal, dodecylamine, 2-metallogenica - lat, tridecylamine, 5-methyltricyclo, tetradecanamide, pentadecylic, hexadecylamine, 2-methylhexadecanoic, heptadecanoyl, 5-isopropyl-heptadecanoyl, 5-atractylenolide, octadecylamine, nondetergent, ensilability, such cycloalkylcarbonyl, as, for example, cyclopentylacetic, cyclohexylacetate, 3-vinyl-2-butyl-cyclohexylacetate, cycloheptylamine, cyclooctylamine, brylcreem and isobutylacetate.

In the number of forming intermolecular bonds of the monomers (C) are all connections that correspond to the polymerization process conditions can lead to the formation of a mesh structure. These include, in particular, are

a) difunctional (meth)acrylates, in the preferred case of the compounds of General formula

where R means a hydrogen atom or methyl group, and n indicates a positive integer equal to two or more of the two, in the preferred case, it takes values from 3 to 20, in particular, di(meth)acrylates of propane diol, butanediol, hexanediol, octanediol, nonanediol, decanediol and eicosanol;

compounds of General formula

where R means a hydrogen atom or a metal group, and n means the whole place is inoe number from 1 to 14, in particular, di(meth)acrylates of ethylene glycol, diethylene glycol, triethylene glycol, tetraethyleneglycol, dodecaurelia, tetradecapeptide, propylene glycol, dipropyleneglycol and tetradecanoylphorbol;

di(meth)acrylate glycerol, 2,2'-bis[n-(γ-methacrylate-β-hydroxypropoxy)phenyl-propane] or bis-GMA, dimethacrylate of bisphenol a, di(meth)acrylate neopentyl glycol, 2,2'-di-(4-methacryloxypropyl)propane with a number of taksigrup in the molecule from two to ten and 1,2-bis(3-methacrylate-2-hydroxypropoxy)butane;

b) tri - or polyfunctional (meth)acrylates, in particular three(meth)acrylate of trimethylolpropane and Tetra(meth)acrylate of pentaerythritol;

in this connection, forming a net structure during the graft copolymerization containing at least two double C-C-bonds of different reactivity, in particular alismataceae and allylacetate;

g) aromatic compounds used for the formation of a mesh structure, in particular 1,2-divinylbenzene, 1,3-divinylbenzene and 1,4-divinylbenzene.

In the preferred case, the choice of monomers or, respectively, the selection of the ratio of the parts of the mass of the monomers a) to D) of the first composition is carried out so that the polymer formed during the polymerization of the first mixture of monomers, had a glass transition temperature Tgnot less than 10°With, in predpochtitel the nom case not less than 30° C. When the glass transition temperature of the polymeric product Tgcan be determined in a known manner by differential scanning calorimetry. In addition, the approximate value of glass transition temperature Tgcan also be pre-calculated using equation Fox. This equation (Fox .G., Bull. Am. Physics Soc. 1, 3, page 123 (1956)) is

where xnmean mass fraction (wt.%/100) of the monomer n and Tgmeans the glass transition temperature in Kelvin of homopolymer based on monomer n. Other useful information can be obtained from the Polymer Handbook, 2nd ed., J. Wiley & Sons, new York (1975), where the values of Tgfor a variety of products homopolymerization.

The second mixture of monomers contains

D) from 80,0 to 100.0 parts by mass, in the preferred case, 92,0 to 98,0 parts by mass, with respect to E) various (meth)acrylates,

E) from 0.05 to 10 parts by mass, in the preferred case from 0.1 to 2.0 parts by weight of the monomers forming intermolecular bonds, and

W) from 0.0 to 20.0 parts by mass, in the preferred case from 8.0 to 20.0 parts by mass of styrene monomers of the General formula (I),

moreover, in the preferred case, these parts of the mass to a total of 100.0 parts of the mass.

Of course, the compounds D), (E) and (F) differ from each other, in particular soy is inane D) do not include forming intermolecular bonds of the monomers (E).

In the framework of the present invention the term (meth)acrylates include acrylates, methacrylates, and mixtures thereof. Accordingly include compounds that include at least one group of the formula

and R means a hydrogen atom or a metal residue. These include, in particular, the above-named alkylacrylate and alkyl methacrylates. It is also very useful to accomplish the present invention targets were arylalkylamines, in particular benzyl, phenylethyl-, phenylpropyl-, fenilpentil and/or phenylhexa-acrylate. In the preferred case, they are used in quantities of from 0.1 to 40.0 wt.% based on the total weight of component D) and (E).

Forming intermolecular bonds of the monomers (E) in accordance with the invention include the above-mentioned forming intermolecular bonds of the monomers).

Under the most preferred embodiments of the present invention, the second mixture of monomers contains

D) from 90,0 to 97.9 parts by weight of alkylacrylate with the number of carbon atoms in the alkyl residue of from three to eight and/or alkyl methacrylates with the number of carbon atoms in the alkyl residue of from seven to fourteen, in particular the acrylate and/or dodecylmercaptan,

E) from 0.1 to 2.0 parts by weight of the monomers forming intermolecular bonds, and

W) from 0.0 to 20.0 parts by mass, in the preferred case from 8.0 to 20.0 parts by mass of styrene monomers of the General formula (I),

moreover, in the preferred case, these parts of the mass to a total of 100.0 parts of the mass.

Moreover, the choice of monomers or, respectively, the selection of the ratio of the parts of the mass of the monomers D), (E) and (F) a second composition in the optimal case carried out so that the polymer formed by polymerization of the second part, had a glass transition temperature Tgless than 30°With, in the preferred case, less than 10°With, in particular in the range from 0 to -75°C. When the glass transition temperature Tgthe product of polymerization can be determined, as mentioned above, by using differential scanning calorimetry and/or pre-approximately calculated using equation Fox.

The third line contains

C) from to 50.0 to 100.0 parts by mass, in the preferred case is 60.0 to 100.0 parts by mass, in the preferred case of 75.0 to 100.0 parts by weight, in particular from 85.0 to 99.5 parts by mass of alkyl methacrylates with the number of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in particular from one to eight,

S) from 0.0 to 40.0 parts by mass, in the preferred case from 0.0 to 25.0 parts by weight, in particular from 0.1 to 15.0 parts by mass, alkylacrylate with the Islom of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in particular from one to eight, and

K) from 0.0 to 10.0 parts by mass, in the preferred case from 0.0 to 8.0 wt.%, styrene monomers of the General formula (I),

moreover, in the preferred case, these parts of the mass to a total of 100.0 parts of the mass.

In accordance with the most preferred implementation of the present invention, the third composition contains at least 50 wt.%, in the appropriate case, not less than 60 wt.%, in the preferred case, not 75 wt.%, in particular at least 85 wt.%, of methyl methacrylate, based on the total weight of component C) to K).

Moreover, the choice of monomers or, respectively, the selection of the ratio of the parts of the mass of the monomers C), e) And K) of the third part in the optimal case carried out so that the polymer formed by polymerization of the third part, had a glass transition temperature Tgnot less than 10°With, in the preferred case, at least 30°C. When the glass transition temperature Tgthe product of polymerization can be determined, as mentioned above, by using differential scanning calorimetry and/or pre-approximately calculated using equation Fox.

According to the invention corresponding to the method of polymerization in stages b) to g) occurs in the temperature interval from more than 60 to less than 90°With, in whole is consistent with the case in the range from more than 70 to less than 85° Since, in the preferred case in the range from greater than 75 to less than 85°C.

Initiation at the expense usually used for emulsion polymerization initiators. Suitable organic initiators are, for example, hydroperoxides such as tert-butylhydroperoxide or cumene hydroperoxide. Suitable inorganic initiators are hydrogen peroxide, and salt peroxidizing acid with alkali metals and ammonium salts, in particular peroxodisulfate sodium and potassium. Named initiators can be used as the sole initiators or mixtures thereof. In the preferred case, they are used in quantities of from 0.05 to 3.0 wt.% based on the total weight of the monomers at an appropriate stage.

Stabilization of the reaction mass is carried out using emulsifiers and/or protective colloids. Preference is given to stabilization with the help of emulsifiers in order to obtain a dispersion with low viscosity. In the preferred case, the total amount of emulsifier is from 0.1 to 5 wt.%, in particular from 0.5 to 3 wt.%, based on the total weight of monomers a) to C). Particular preference is given to anionic or nonionic emulsifier and their mixtures, in particular

the alkyl sulphates, in the preferred case, the alkyl sulphates with the number of carbon atoms in Ala is flax residue from eight to eighteen, the sulfates of ethoxylated alcohols and ethoxylated alkyl phenols with the number of carbon atoms in the alkyl residue of from eight to eighteen and the number ethylenoxide structural units from one to fifty;

- sulfonates, in the preferred case, the alkyl sulphonates with the number of carbon atoms in the alkyl residue of from eight to eighteen, alkylarylsulfonates with the number of carbon atoms in the alkyl residue of from eight to eighteen, esters and partial esters sulfonterol acid with a monohydroxy alcohols or alkyl phenols with the number of carbon atoms in the alkyl residue of from four to fifteen; in appropriate cases, these alcohols or ALKYLPHENOLS may also be ethoxylated and include from one to forty ethylenoxide structural units;

- partial esters of phosphoric acid, and their salts with alkali metals and ammonium salts, in the preferred case, the alkyl and alkylaryl-phosphates with the number of carbon atoms in the alkyl or, respectively, in alcylaryl residue from eight to twenty and the number ethylenoxide structural units from one to five;

- alkylbis esters of polyglycols, in the preferred case, with the number of carbon atoms in the alkyl residue of from eight to twenty and the number ethylenoxide structural units from eight to forty;

- alkylammonium EPE is am of polyglycols, in the preferred case, with the number of carbon atoms in the alkyl and, accordingly, in alcylaryl residue from eight to twenty and the number ethylenoxide structural units from eight to forty;

- copolymers of ethylene oxide and propylene oxide, in the preferred case of block copolymers, in the optimal case number ethylenoxide and, accordingly, propylenoxide structural units from eight to forty.

In accordance with the invention, preference is given to using mixtures of anionic emulsifier and a nonionic emulsifier. This is best proven mixture of full or partial ester sulfonterol acid with a monohydroxy alcohols or alkyl phenols with the number of carbon atoms in the alkyl residue of from four to fifteen as anionic emulsifier and alilovic ethers of polyglycols with the number of carbon atoms in the alkyl residue in the preferred case from eight to twenty and the number ethylenoxide structural units from eight to forty as a nonionic emulsifier when the mass ratio from 8:1 to 1:8.

In appropriate cases, the emulsifiers can be used in a mixture with protective colloids. In a number of suitable protective colloids are, along with other partially the saponified polyvinyl acetate, polyvinylpyrrolidone, ka is boxymethyl-, methyl-, hydroxyethyl-, hydroxypropyl-cellulose, starches, proteins, poly(meth)acrylic acid, poly(meth)acrylamide, polyphenylsulfone acid, melamineformaldehyde the sulfonates, naphthaleneformaldehyde the sulfonates, copolymers of styrene and maleic acids and copolymers of vinyl ethers and maleic acid. In the case of protective colloids them in the preferred case, take in the amount of from 0.01 to 1.0 wt.% based on the total amount of monomers a) to C). Protective colloids may be added at the beginning of the polymerization or can be added gradually in the course.

The initiator can be added to the original mixture or it can be added gradually. In addition, you can also part of the initiator to be added to the initial mixture, and the residue is added gradually.

In the preferred case, the polymerization begin heating the initial mixture to the polymerization temperature and adding the initiator, which in the preferred case is in the form of a solution in water. The addition of emulsifier and monomer can be performed separately or as a mixture thereof. Adding mixtures of emulsifier and monomer is conducted so that the emulsifier and monomer pre-mixed, passing through prior to the polymerization reactor mixer. In the preferred case, the remainder of the emulsifier and the remainder of the monomer,which were not loaded at the beginning, after the start of polymerization is served separately. In the preferred case, adding begin within 15-35 minutes after the start of polymerization.

In addition, for purposes of the present invention, particularly preferably, when the initial download contains the so-called "seed" latex, which in the preferred case can be obtained by polymerization of alkyl(meth)acrylates; in the optimal case, the radius of its particles is in the range from 3.0 to 20.0 nm, in the preferred case in the range from 5.0 to 20.0 nm. These small radii can be calculated after a certain polymerization on the surface of particles of the seed latex, which around the particles of the seed latex is formed shell, and thus particles measure the radius by way of Coulter. This is known from literary sources method of determining particle size based on the measurement of electrical resistance characteristic which is modified with the passage of the particles through a narrow calibrated hole. Other details can be gathered, for example, from work Nachr. Chem. Tech. Lab.43, 553-566 (1995).

The monomers constituting parts of the kernel, that is, the first composition is added to the seed latex under conditions which prevent the formation of new particles. As a result of this about is azushima in the first phase of the polymerization product is deposited in the form of a shell around the seed latex. By analogy with these monomers, which represents a constituent material of the first shell (the second part)is added to the product of emulsion polymerization under such conditions that prevent the formation of new particles. In the result generated by the second stage, the polymerization product is deposited in the form of a shell around the existing kernel. The methodology of the process should accordingly be repeated to obtain each new shell.

In accordance with another preferred implementation of the present invention corresponding to the invention of nuclear-shell particles obtained by emulsion polymerization method, the implementation of which instead of the seed latex in the initial stage load in emulsified form long-chain aliphatic alcohol, in the preferred case, it contains from twelve to twenty carbon atoms. In the preferred implementation of this method as a long chain aliphatic alcohol use stearyl alcohol. Nuclear shell structure receive by analogy with the above methodology of the process in the stepwise addition and polymerization of the corresponding monomers, when precluded the formation of new particles. Other details of the method of polymerization of SPE is ialist can be found on the materials of patents Germany No. 3343766, No. 3210891, No. 2850105, No. 2742178 and No. 3701579.

And yet regardless of the specific method of carrying out the process of the present invention the best results are obtained by adding the second and third of the mixture of monomers as they are spending.

Adjustment of the lengths of the chains, in particular, the products (co)polymerization of the second shell (third part) may be carried out by polymerization of a monomer or mixture of monomers in the presence of regulators of molecular masses, as, in particular, is known in this area mercaptans, for example, n-butylmercaptan, n-dodecylmercaptan, 2-mercaptoethanol or 2-ethylhexylacrylate, pentaerythritoltetranitrate, and in General regulators of molecular masses used in quantities of from 0.05 to 5 wt.% based on the mixture of monomers, in the preferred case in the amount of from 0.1 to 2 wt.%, in the most preferred case, in quantities of from 0.2 to 1 wt.% based on the mixture of monomers (see, for example, N. Rauch-Puntigam, Th. Völker, "Acryl - und Methacrylverbindungen", Springer, Heidelberg, 1967; Houben-Weyl, Methods der organischen Chemie, T. XIV/1. p.66, Georg Thieme, Heidelberg, 1961, or Kirk-Othmer, Encyclopedia of Chemical Technology, T.1, str and SL, J.Wiley, new York, 1978). In the preferred case, as the regulator of molecular masses using n-dodecylmercaptan.

To remove residual monomers after polymerization can be and is used known methods of depolymerization, for example initiated depolymerization.

As appropriate, the invention methods can be used primarily to obtain aqueous dispersions with a high solids content greater than 50 wt.% based on the total weight of the aqueous dispersion, the relative proportions of all substances are chosen so that the total mass of component a) to K) above to 50.0 wt.% based on the total weight of the aqueous dispersion, it is advisable, when it exceeds 51,0 wt.%, in the preferred case, it is more 52,0 wt.%. To take into account in this connection, the substances along with the monomers a) to C) are all other used substances such as water, emulsifier, initiator, regulator and protective colloids, if they were used, and others

In addition, for persecuted by the present invention purposes especially preferably, when the relative proportions of the component is chosen so as to achieve a nuclear-shell particles with a common radius, measured according to the method of Coulter, ranging from 150,0 to less 250,0 nm, in the preferred case within 170,0 to 220,0 nm.

Get the relevant invention is a method of aqueous dispersions have a low content of coagulate, which in the preferred case should not be more than 5.0 wt.% based on the total weight of the aqueous dispersion, it is reasonable, when it is less than 3.0 wt., in particular, when it is less than 1.5 wt.%. In accordance with the most preferred implementation of the present invention aqueous dispersion contains less than 1.0 wt.% the coagulate is based on its total weight, in a preferred case, less than 0.5 wt.%, more preferably, when it is less than 0.25 wt.%, in particular, when it is 0.1 wt.% or even less.

The concept of "coagulate" in this context refers to a water-insoluble constituent parts, which in the preferred case can be separated by filtering the dispersion through the corresponding filter cuff, covered a filter cloth No. 0.90 according to DIN 4188.

Corresponding to the invention of nuclear-shell particles can be obtained from the dispersion, for example, by drying with a spray coagulation by freezing, precipitation by addition of electrolyte or through the use of mechanical or thermal loads, as represented, for example, in the patent application Germany No. 2750682 A1 or in U.S. patent No. 4110843 using a degassing extruder. Most often used method of drying by spraying, although other mentioned methods have the advantage that with their help from the product of polymerization of at least partially separated water-soluble excipients used in the polymerization.

Appropriate and the attainment of a nuclear-shell particle is used to improve the toughness on the sample with a cut solid thermoplastic plastics with the solid phase to which it is compatible, in the preferred case, this is a poly(meth)acrylic molding material, in particular polymethylmethacrylate.

Poly(meth)acrylic molding material in the preferred case contain other polymers in order to appropriately modify their properties. These include, in particular, polyacrylonitrile, polystyrenes, polyethers, polyesters, polycarbonates, and PVC. These polymers can be used individually or as mixtures, all in the most preferred embodiments of the present invention to the forming mass type copolymers, which are derivatives of the above polymers. In particular, these include the styrene-Acrylonitrile copolymers, which in the preferred case, add to the molding masses up to 45 wt.%.

Particular preference is given to styrene-Acrylonitrile, the copolymer that can be obtained by polymerization of mixtures of

from 70,0 to 92,0 wt.% styrene,

from 8.0 to 30.0 wt.% Acrylonitrile and

from 0.0 to 22.0 wt.% other comonomers, in each case based on

the total weight of polymerizable monomers.

As a rule, to 100 parts of the modified molding material admixed from 10 to 60 parts tools, modifying UDA the relative viscosity.

In accordance with the invention, the most preferred molding masses containing:

A) from 1.0 to 50.0 wt.% at least one type of nuclear-shell particles corresponding to at least one of the p.p. of the claims from 1 to 9;

B) from 1.0 up to 99.0 wt.% at least one (meth)acrylic polymer;

B) from 0.0 to 45,0 wt.%, in the preferred case from 1.0 to 45,0 wt.%, styrene-Acrylonitrile copolymers and

D) from 0.0 to 10.0 wt.% other additives

in each case based on the total weight, with the weight percent total 100.0 wt.%.

In the preferred case, the (meth)acrylic polymer includes in each case based on its total weight

a) to 50.0 to 100.0 wt.%, in the appropriate case, by 60.0 to 100.0 wt.%, in a particularly preferred case of 75.0 to 100.0 wt.%, in particular from 85.0 to 99.5 wt.% alkylmethacrylamide recurring structural units with the number of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in the appropriate case, from one to eight, in particular from one to four;

b) from 0.0 to 40.0 wt.%, in the preferred case from 0.0 to 25.0 wt.%, in particular from 0.1 to 15.0 wt.% alkylacrylate recurring structural units with the number of carbon atoms in the alkyl residue of from one to twenty, in predpochtite the flax case from one to twelve, in the appropriate case, from one to eight, in particular one to four, and

C) from 0.0 to 8.0 wt.% styrene recurring structural units of the General formula (I),

the percentage mass of total 100.0 wt.%.

In accordance with the most preferred implementation of the present invention (meth)acrylic polymer contains, based on its total weight is not less than 50.0 wt.%, in the appropriate case, by 60.0 wt.%, in the preferred case of 75.0 wt.%), in particular not less 85,0 wt.% methyl methacrylate repeating structural units.

In addition, (meth)acrylic polymer in the preferred case has srednekovoi value of molecular weight in the range from 1000 to 100000000 g/mol, more preferred in the range from 10000 to 1000000 g/mol, in particular in the range from 50,000 to 500,000 g/mol. When this molecular weight may be determined for example by gel permeation chromatography with calibration by polystyrene.

Such mixtures can be obtained in various ways. You can, for example, mixing the dispersion of nuclear-shell particles with an aqueous dispersion of an adulterated components and to coagulate the mixture, to separate the aqueous phase and to fuse coagulate into the molding composition. In this way, a particularly uniform mixture of the two masses. Components can also be is received and allocated to each separately, mixed in the form of their melts, or in the form of powders or in the form of granulates and homogenized using mnogochastichnogo extruder or roller mixer.

Other additives can be mixed at any suitable stage of processing. To them, among others, include dyes, pigments, fillers, reinforcing fibers, means for facilitating the sliding means to protect from UV radiation and other

Under the most preferred embodiments of the present invention, the molding composition contains from 0.1 to 10.0 wt.%, in the preferred case from 0.5 to 5.0 wt.%, in particular from 1.0 to 4.0 wt.%, in each case, based on its total weight, another product of polymerization (AR), which in comparison with (meth)acrylic polymer is superior in not less than 10% of the mass-average molecular weight, in the preferred case, it is more on not less than 50%, in particular less than 100%. When this molecular weight may be determined for example by gel permeation chromatography with calibration by polystyrene.

In accordance with the invention, the most suitable products of polymerization (AR) include, in each case based on their total weight, in the preferred case

a) to 50.0 to 100.0 wt.%, in the appropriate case, by 60.0 to 100.0 wt.%, in a particularly preferred the equipment case of 75.0 to 100.0 wt.%, in particular from 85.0 to 99.5 wt.% alkylmethacrylamide recurring structural units with the number of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in the appropriate case, from one to eight, in particular one to four,

b) from 0.0 to 40.0 wt.%, in the preferred case from 0.0 to 25.0 wt.%, in particular from 0.1 to 15.0 wt.%, alkylacrylate recurring structural units with the number of carbon atoms in the alkyl residue of from one to twenty, in the preferred case, from one to twelve, in the appropriate case, from one to eight, in particular one to four, and

C) from 0.0 to 8.0 wt.% styrene recurring structural units of the General formula (I),

the percentage mass of total 100.0 wt.%.

In accordance with the most preferred implementation of the present invention the product of polymerization (AR) contains based on its total weight is not less than 50.0 wt.%, in the appropriate case, by 60.0 wt.%, in the preferred case of 75.0 wt.%, in particular not less 85,0 wt.% methyl methacrylate repeating structural units.

In addition, the product of polymerization (AR) in the preferred case has srednekovoi value of molecular weight ranging from 10,000 to 100000000 g/mol, more preferred in the range from 50000 is about 5000000 g/mol, in the appropriate case in the range from 100000 to 1000000 g/mol, in particular in the range from 250,000 up to 600,000 g/mol. When this molecular weight may be determined for example by gel permeation chromatography with calibration by polystyrene.

A mixture of nuclear-shell particles, in particular polymethyl methacrylate, suitable, in particular, to obtain molded bodies, which expedient if the wall thickness exceeds 1 mm, for example extruded strips with a thickness of 1 to 10 mm, which is well processed by stamping and can be successfully used, for example, for the manufacture of screens with overprint for appliances or to obtain injection molded bodies of high quality, such as glass for vehicles. Of them can be obtained and a thinner film thickness of, for example, 50 μm.

Molded articles obtained in accordance with the invention, different

in the preferred case, Vicat-softening temperature ISO 306 (50) not less than 85°With, in the preferred case, at least 90°and in the most preferred case, at least 93°C

in the preferred case of toughness on the sample with a cut on Charpy (ISO 179) at 23°not below 6.0 kJ/m2in the preferred case not less than 2.5 kJ/m2in particular not less than 2.5 kJ/m2at -10°,/p>

in the preferred case, the modulus of elasticity to ISO 527-2 at less than 1500 MPa,

in the preferred case, the blushing according to ASTM D 1003 (1997) is preferably not more than 2.5%,

in the preferred case, the melt viscosity according to DIN 54811 (1984) more than 2000 PA·and preferably not more than 4,500 PA·C

in the preferred case, the transmittance (D 65/10°) according to DIN 5033/5036 not less than 88.5 percent, and

in the preferred case, the ability to extrude according to DIN 54811 (1984) in the range from 0 to 20%.

In particularly preferred embodiments of the present invention corresponding to the invention molded product is used as enclosures mirrors or spoilers of the car, as a pipe, as cladding or structural element of the refrigerator.

The following examples and comparison examples are intended to illustrate the present invention, therefore, they cannot serve as a basis for restricting the concept of the invention.

I. Nuclear-shell particles

A. obtaining a seed latex

The seed latex is obtained by emulsion polymerization of the composition of the monomers containing 98 wt.% ethyl acrylate and 2 wt.% illimitability. The content of these particles with a diameter of about 20 nm in water is about 10 wt.%.

B. Obtaining nuclear shell particles

Synthesis of nuclear-shell particles, the characteristic is cteristic which is given hereinafter, carried out in accordance with the method of obtaining A (corresponding to the invention of examples B1 and B2), B (comparison examples SB and SB), (examples of comparison swod and SB in accordance with U.S. patent No. 3793402) or G (examples comparison SB, SB and SB in accordance with the Federal Republic of Germany patent No. 4136993). Used are shown in table 1 emulsion I to III.

B1. The method of obtaining A (corresponding to the invention of examples)

At 83°C (the temperature in the reactor) in the reactor for polymerization under stirring download 19,416 kg of water. Then added 16.2 g of sodium carbonate and 73 g of the seed latex. Then add the emulsion within one hour. 10 minutes after completion of addition, the emulsion I in for about two hours, add the emulsion II. Finally after about 90 minutes after the addition of emulsion II for about one hour is added to the emulsion III. 30 minutes after completion of addition, the emulsion III is cooled to 30°C.

For the Department of nuclear-shell particle dispersion in two days frozen at -20°C, then thawed and separated coagulated dispersion by filtration through cloth. Drying of solids is carried out at 50°in a drying Cabinet (approximately three days). Other details are presented in table 1.

The size of the nuclear-shell particles (see table 2)measured using an instrument Coulter N4, the measurement is performed on the particles in dispergirovannom condition.

B2. Methods of obtaining B (comparison examples SB and SB)

At 52°C (the temperature in the reactor) in the reactor for polymerization under stirring download 20,129 kg of water and added 1.18 g of acetic acid, 0.04 g of iron sulfate (II), and 12.9 g of disulfit sodium and to 121.5 g of the seed latex. Then for 1.5 hours add emulsion I. After 10 minutes after addition of the emulsion I add the solution to 38.8 g of disulfit sodium in 1176 g of water and approximately 2.5 hours add emulsion II. Finally after about 30 minutes after the addition of emulsion II was added a solution of 12.9 g of disulfit sodium 588,2 g of water and within about 1.5 hours add emulsion III. 30 minutes after completion of addition, the emulsion III is cooled to 30°and adding sodium carbonate establish a pH value of 8. Higher solids content in the resulting dispersion than 48% can not be reached, because otherwise there is the formation of an increased number of coagulate (more than 1 wt.% from the dispersion).

For the Department of nuclear-shell particle dispersion over two days frozen at -20°C, then thawed and separated coagulated dispersion by filtration through cloth. Drying of solids is carried out at 50°in susil the Ohm Cabinet (approximately three days). Other details are presented in table 1.

The size of the nuclear-shell particles (see table 2) measured using an instrument Coulter N4, the measurement is performed on the particles in dispergirovannom condition.

B3. The method of obtaining (examples of comparison in accordance with U.S. patent No. 3793402)

Obtaining examples of comparison SB and SB occurs mainly by analogy with example 1 of U.S. patent No. 3793402. The only difference is that the ratio of the monomers of the first shell consistent with the respective invention examples and the variance obtained using three load ("triple-batch"), that is, monomers for the core, for the first and the second shell in each case immediately download and then conduct the polymerization. Other details of the synthesis are shown in tables 3 to 6. The data on the solids content and coagulate collected in table 7. To determine the content of coagulate in all of its dispersion was filtered through filter cuff VA with a stretched her filter cloth No. 0.90 DIN 4188. The precipitate is washed with water until, until it becomes transparent. The resulting coagulate press with a spatula, transferred into pre-weighed chemicals glass and weighed on a laboratory balance with an accuracy of up to 0.1, the Filtrate is weighed on a laboratory weight is x with an accuracy of up to 1, The weight of the entire dispersion is determined by the sum of the masses of coagulate and filtrate.

The coagulate (wt.%) = 100 × [mass formed coagulate (g)]/[weight of the entire dispersion (g)]

The radii obtained nuclear-shell particles and the distribution of their particle sizes are shown in table 8. In this case, for characterization of particle size was used as an instrument Coulter N4, and the analytical ultracentrifuge. In addition, using analytical ultracentrifuge determine the distribution of particle sizes. In table 8 the data have the following values:

R10, R50, R90 is the radius of the nuclear shell particles contained in the dispersion in amounts of less than 10, 50 and, respectively, 90 wt.%,

U80=(R90-R10)/R50 - a measure of uniformity in the distribution of particle sizes, this value includes 80 wt.% nuclear-shell particles.

B4. The method of obtaining G (examples of comparison in accordance with the Federal Republic of Germany patent No. 4136993)

Obtaining examples of comparison SB, SB and SB carried out basically in accordance with example 1 of the Federal Republic of Germany patent No. 4136993. However, the number of loaded emulsions decreased from 30 to 20 wt.% in order to install the same particle size in the dispersions, and the respective invention examples. In addition, at the last stage is added an aqueous solution of the initiator. Other details of the synthesis are given in alizah 3 - 6, the characteristic exponents are summarized in tables 7 and 8, the results of their comparison with the product of polymerization B1.

C. Obtain a mixed dispersion

The mixed dispersion (solids content about 50 wt.%) produced by emulsion polymerization, the composition of monomers composed of 95 wt.% of methyl methacrylate and 5 wt.% ethyl acrylate. The particle size is 260 nm in diameter (determination carried out on the instrument Coulter N4), and the value of J (a measure of molecular weight) is 203 ml/g (determination carried out in chloroform at a temperature of 25°C, DIN ISO 1628-6).

II. The molding material

A. Mixing molding masses

Molding on polymetylmetacrylate basis, PLEXIGLAS® 7N (manufactured by Rohm GMBH & Co. KG, Darmstadt) are mixed with the corresponding nuclear-shell particles in the extruder. The compositions according to the individual examples and the comparison examples are shown in tables 3-8.

B. Tests molding masses

From the obtained mixture molding masses receive samples for testing. The molding material and the corresponding samples of experience in the following techniques:

the melt viscosity ηs (220°C/5 MPa) according to DIN 54811 (1984),

- the ability to extrude In: DIN 54811 (1984),

- Vicat-softening temperature (16 hours, 80° (C) according to DIN ISO 306 (August 1994),

- impact strength of the sample with the cut And the ode ISO 180 (1993),

- impact strength of the sample with a cut on Charpy ISO 179 (1993),

- modulus of elasticity to ISO 527-2,

- transmission (D 65/10°) according to DIN 5033/5036,

- blushing (Hazemeter BYK Gardner Hazegard plus) no ASTM D 1003 (1997).

The test results are also given in table 2.

It clearly demonstrates the benefits relevant to the invention mixed compositions a, B, C and D compared with conventional molding masses with the modified toughness (SA and SB).

When comparing the contents of the nuclear-shell particles (less than 40 wt.%) the impact strength of the sample with a cut on Charpy at 23°relevant to the invention molding masses lies significantly higher than the molding masses according to the comparison examples, and at -10°they are on a comparable level. This applies also to the optical properties (blushing, transmission), rheological properties (viscosity, the ability to extrude) and mechanical properties (modulus of elasticity)that are also at a comparable level.

Water
Table 1

The composition of individual emulsions (all figures in grams)
SBSBB1B2
Emulsion I
8823,58823,58109,658109,65
The sodium persulfate8,248,24
The potassium persulfate9,49,4
Aerosol FROM 7582,482,465,8865,88
The methyl methacrylate8622,08276,114216,7214216,72
The methacrylate345,9593,60593,60
Allylacetate25,925,929,6829,68
Emulsion II
Water714071407081,187081,18
The sodium persulfate18,5918,59
The potassium persulfate28,228,2
Aerosol FROM 7582,482,484,7184,71
The acrylate144381443815454,815454,8
the Tyrol 3004,23004,23453,483453,48
Alismataceae229,74229,74171,72171,72
Emulsion III
Water4542,44542,42992,592992,59
The sodium persulfate8,248,24
The potassium persulfate8,88,8
Aerosol FROM 7515,315,310,5910,59
The methyl methacrylate10828,810828,876327632
The acrylate451,2451,2848848
Dodecylmercaptan39,539,5

Table 2
The results of the tests modified for toughness molding masses.
Mixed compositionSAT AndSS BAndBIn G
Nuclear-shell particlesSBSBB1B1B2B2
The radius of the particle [nm]188188164164
The contents of the nuclear-shell particles in Plexiglas® 7N [wt.%]39,939,338,435,738,438,4
Viscosity ηs [PA·]212027803210306032103600
The ability to extrude In [%]21,411,0the 3.86,95,612,6
Vicat-softening temperature [°]99,895,595,696,294,995
Impact strength Izod
23°With: [kJ/m2]6,26,16,46,0
-10°With: [kJ/m2]4,13,5 3,63,7
Impact strength Charpy
23°With: [kJ/m2]5,26,07,46,7
-10°With: [kJ/m2]2,02,9a 3.92,7
Modulus of elasticity [MPa]2180180516601900
Transmittance [%]of 89.188,790,590,790,9
Blushing
23°With: [%]1,21,32,32,01,81,6
40°With: [%]5,435,395,85,8the 4.7the 4.7
* With mixed dispersion (3 wt.% solids in the mixed dispersion is based on the solid in the dispersion).

Table 3
The structure of the nuclear shell particles
SBSBSBSBSBB1
Core25,0525,0520202035
The first shella 50.5a 50.550505045
The second shell252530303020

0,2
Table 4
The kernel
SBSBSBSBSBB1
The methyl methacrylate99,899,898,698,698,695,8
MMA0,870,870,87
The acrylate4,0
Alismataceae0,20,520,520,520,2

Table 5
The first shell
SBSBSBSBSBB1
The acrylate81,181,180,180,180,181,0
Styrene17,917,918,918,918,918,1
Alismataceae1,01,01,01,01,00,9

Table 6
The second shell
SBSBSBSBSBB1
The methyl methacrylate96,096,096969690
The acrylate4,04,044410
Dodecylmercaptan

1Ultracentrifuge.
Table 8
The radii of the particles
SBSBSBSBSBB1
R101[nm]172113133165
R501[nm]163123145180
R901[nm]166145168202
U8010,080,260,250,21
The radius of the particles2[nm]191128162188
The radius of the particles2the seed latexes and, respectively, participating in polymerizatio original emulsion [nm]596410
2The measurement is carried out on the instrument Coulter N4

1. A method of obtaining a water dispersion, according to which

a) take water and emulsifier,

b) add from 25.0 to 45.0 parts by weight of the first composition containing

A) to 50.0 to 99.9 parts by weight of alkyl methacrylates with the number of carbon atoms in the alkyl residue of from one to twenty,

B) from 0.0 to 40 parts by weight of alkylacrylate with the number of carbon atoms in

the alkyl residue of from one to twenty,

C) from 0.1 to 10.0 parts by weight of the monomers forming intermolecular

communication, and

D) from 0.0 to 8.0 parts by mass of styrene monomers of the General formula (I)

moreover, the remains of R1to R5in each case, independently of one another mean a hydrogen atom, halogen, alkyl group with carbon atoms of from one to six or alkenylphenol group with the number of carbon atoms from two to six and the remainder R6means a hydrogen atom or alkyl group with carbon atoms of from one to six,

and polimerizuet to the degree of conversion is not less 85,0 wt.% based on the total weight of component a), B), C) and D),

C) add from 35.0 to 55.0 parts by weight of the second composition, soteriades the

D) from 80,0 to 100.0 parts by mass of alkyl(meth)acrylate,

E) from 0.05 to 10.0 parts by weight of the monomers forming intermolecular bonds, and

W) from 0.0 to 20.0 parts by mass of styrene monomers of the General formula (I),

and polimerizuet to the degree of conversion is not less 85,0 wt.% based on the total weight of component D), (E) and (F),

g) added from 10.0 to 30.0 parts by weight of the third composition containing

3) to 50.0 to 100.0 parts by mass of alkyl methacrylates with the number of carbon atoms in the alkyl residue of from one to twenty,

S) from 0.0 to 40.0 parts by mass of alkylacrylate with the number of carbon atoms in the alkyl residue of from one to twenty and

K) from 0.0 to 10.0 parts by weight of styrene monomers of the General formula (I), and polimerizuet to the degree of conversion is not less 85,0 wt.% based on the total weight of component 3), And)),

moreover, these parts weight compounds b), C) and d) add up to 100.0 parts by mass,

characterized in that

d) each polymerization is carried out in the temperature range from more than 60 to less than 90°and

e) the relative content of all substances are chosen so that the total mass of component a) to K) based on the total weight of the aqueous dispersion was more to 50.0 wt.%.

2. The method according to claim 1, characterized in that the receiving water dispersion containing less than 5.0 wt.% the coagulate from the of asceta on its total mass.

3. The method according to claim 1, characterized in that as the original mix download from 90,00 to 99.99 parts by weight of water and from 0.01 to 10.00 parts by weight of emulsifier, and these parts of the mass to a total of 100 parts of the mass.

4. The method according to claim 1, characterized in that the use of anionic or nonionic emulsifiers.

5. The method according to claim 1, characterized in that the source water emulsion further comprises a seed latex.

6. The method according to claim 5, characterized in that the loaded seed latex has a particle radii, measured according to the method of Coulter, in the range from 5.0 to 20.0 nm.

7. The method according to claim 1, characterized in that the source water emulsion contains alkilany alcohol with the number of carbon atoms in the alkyl residue of from twelve to twenty.

8. The method according to claim 1, characterized in that the polymerization in stages from b) to d) initiate using peroxodisulfate, in the preferred case of using peroxodisulfate ammonium and/or alkali metal.

9. The method according to claim 1, characterized in that the relative content of all substances is chosen so as to achieve a nuclear-shell particles with a common radius, measured according to the method of Coulter, ranging from 150,0 to less 250,0 nm.

10. The method according to one of claims 1 to 9, characterized in that the second and third mixtures of monomers are added as they are spending.

11. Nuclear is about the ochechnogo particles, obtained from the aqueous dispersion by the method according to any one of claims 1 to 10 by drying with a spray coagulation by freezing, precipitation by addition of electrolyte or through the use of mechanical or thermal load.

12. Molding composition containing in each case based on its total weight

A) from 1.0 to 50.0 wt.% at least one nuclear-shell particles according to claim 11;

B) from 1.0 up to 99.0 wt.% at least one (meth)acrylic polymer;

B) from 0.0 to 45,0 wt.% styrene-Acrylonitrile copolymers and

D) from 0.0 to 10.0 wt.% additives, such as dyes, pigments, fillers, reinforcing fibers, means for facilitating the slide, and means for protection against UV radiation

the percentage mass of total 100.0 wt.%.

13. Molding composition according to item 12, wherein the (meth)acrylic polymer includes, in each case based on its total weight,

a) is 60.0 to 100.0 wt.% alkylmethacrylamide recurring structural units with the number of carbon atoms in the alkyl residue of from one to twenty,

b) from 0.0 to 40.0 wt.% alkylacrylate recurring structural units with the number of carbon atoms in the alkyl residue of from one to twenty and

C) from 0.0 to 8.0 wt.% styrene recurring structural units of the General formula (I),

the percentage mass of total 100.0 wt.%.

14. Molding composition according to item 12, wherein the molding composition contains a styrene-Acrylonitrile copolymers, and styrene-Acrylonitrile copolymers obtained polymerization mixture consisting of

from 70 to 92 wt.% styrene, from 8 to 30 wt.% Acrylonitrile and

from 0 to 22 wt.% other comonomers, in each case based on the total weight of polymerizable monomers.

15. Molding composition according to one of PP - 14, characterized in that based on its total weight, it contains from 0.1 to 10.0 wt.% another product of polymerization, Brednikova molecular weight compared with the (meth)acrylic polymer (b) above is not less than 10%.

16. The moldings produced from the molding composition according to one of p - 15.

17. Molded product according to item 16, wherein the molded product is characterized by Vicat-softening temperature ISO 306 (50) not less than 85, in the preferred case, not less than 90 and in the most preferred case, at least 93°With toughness on the sample with a notch (Charpy 179/1eA) no ISO 179 not below 6.0 kJ/m2at 23°and not less than 2.5 kJ/m2at -10°C, the modulus of elasticity to ISO 527-2 at less than 1500 MPa, blushing according to ASTM D 1003 (1997) no more than 2.5%, the transmittance (D 65/10°) according to DIN 5033/5036 not less than 88.5 percent.



 

Same patents:

FIELD: technological processes.

SUBSTANCE: present invention relates to the technology of modifiers production on the basis of nuclear-shell type particles used for production of molding such as films, pipes, mirror housings etc. from poly(meth)acrylates. The nuclear-shell type particle consists of a nucleus, the first shell and, if required, the second shell that on every single case consist of alkylmetacrylate and styrene recurring units with minimum glass-transition temperature of 30°C. The said particles are produced by multistage emulsion polymerisation.

EFFECT: invention ensures implementation of the process with minimum labour costs and small investments for commercial deployment.

15 cl, 2 tbl

FIELD: polymer materials.

SUBSTANCE: invention relates to silicon-acrylic shock strength modifier having layered structure and to thermoplastic resin composition containing it and, more specifically, to silicon-acrylic shock strength modifier consisting of (i) silicon rubber seed containing one or more vinyl copolymers; (ii) acryl rubber core surrounding seed; and (iii) shell containing one or more vinyl copolymers enveloping acryl rubber core; and to thermoplastic resin composition containing shock strength modifier.

EFFECT: improved shock strength and coloration ability of thermoplastic resin.

19 cl, 1 tbl, 24 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to sulfoxides or sulfones grafted on polymers, polymeric compositions, a method for grafting and method for stabilization of polymers. Invention describes polymers comprising a grafted compound of the formula (I): [R1-SOm]n-R-SOp-R2 (I) wherein total symbols have values given in cl. 1 of the invention claim and represents a composition comprising thereof, a method for grafting compound of the formula (I) on polymers and a method for stabilization of polymers. Polymers comprising grafted sulfoxides or sulfones possess high stability against oxidative, thermal, dynamic destruction caused by the light effect and/or destruction caused by ozone effect.

EFFECT: improved preparing method, improved and valuable properties of polymers.

14 cl, 14 tbl, 24 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to acryl-silicone hybrid modifying agent with impact viscosity, a method for their preparing and compositions based on vinyl chloride resins comprising above said materials. Acryl-silicone hybrid modifying agent with impact viscosity comprises the following components: (a) from 0.01 to 10 parts by mass of seed charge-forming agent prepared by mechanism of emulsion copolymerization of vinyl monomers and hydrophilic monomers; (b) from 64 to 94 parts by mass of hybrid acryl-silicone rubber core covering a seed charge-forming agent wherein phase of polyorganosiloxane rubber is dispersed locally on internal part and core surface made of acryl rubber, and (c) from 6 to 40 parts by mass of envelope covering abovementioned rubber core and comprising alkylmethacrylate polymers. Thermoplastic resins comprising abovementioned materials being especially added to vinyl chloride resin acquire the excellent impact stability, resistance to weather and high luster.

EFFECT: improved preparing method, valuable technical properties of materials.

18 cl, 5 tbl, 27 ex

FIELD: polymers.

SUBSTANCE: disclosed are acrylic impact resistance modifier having multilayered structure and containing a) seeding agent obtained by emulsion copolymerization vinyl and hydrophilic monomers; b) seeding agent-enclosing rubber-like core including C2-C8-alkylacrylate polymer; and c) rubber-like core-enclosing shell including C1-C4-alkylmethacrylate polymer, as well as method for production such agent and thermoplastic resin containing the same.

EFFECT: impact resistance modifiers providing increased impact resistance and coloring ability to plastics.

12 cl, 40 ex, 7 tbl

FIELD: organic chemistry, polymers.

SUBSTANCE: invention relates to polymers additives for lubricant oils improving viscosity index and representing dispersers. Disperser-additive improving viscosity index is prepared by a method involving grafting in solution on hydrocarbon polymer prepared from at least one (C2-C28)-polymerizing hydrocarbon wherein abovementioned polymer has an average molecular mass value in the range from about 5000 Da to about 500000Da, compounds of ethylene-unsaturated type comprising from 3 to 10 carbon atoms and at least one group of carboxylic acid or anhydride group, or nitrogen-containing monomer of ethylene-unsaturated type comprising from 6 to 30 carbon atoms and from 1 to 4 nitrogen atoms and with using free-radical initiator wherein the process is carried out in the presence of ester as oil corresponding to the formula: wherein R1, R2, R3, R4, R5 and R6 are chosen independently from the group consisting of hydrogen atom, -COOR7, -COOR8, -COOR9, -COOR10, -COOR11 and -COOR12 under condition that 5 radicals (not above) among R1, R2, R3, R4, R5 and R6 represent hydrogen atom, and R7, R8, R9, R10, R11 and R12 are chosen independently from the group consisting of alkyl and alkyl esters. Disperser-additive improved viscosity index of lubricant oils and elicits dispersing capacity providing suspending sediment that can form in the process of exploitation or using lubricant and prevents carbon formation in engines. Method shows the improved qualities in grafting in solution of unsaturated fragments on hydrocarbon polymer by carrying out the grafting reaction in solution medium containing at least one aromatic ester.

EFFECT: improved preparing method, valuable technical properties of additive.

20 cl, 4 tbl, 4 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a method for preparing thermoplastic polyvinyl chloride molding composition modified with the impact viscosity elastomer-containing modifying agent with improved impact-strength, resistance against bending and improved optical properties by using the impact viscosity modifying agent. Impact viscosity modifying agent consists of core and envelope wherein a core consists of polyvinyl chloride or vinyl chloride copolymer, and an envelope consists of crossed-linked homo- or copolymer of alkylacrylate or alkylmethacrylate. A modifying agent is prepared by emulsion polymerization for two stages wherein at the first stage a core is prepared and at the second stage an envelope is prepared in the presence of a core. Vinyl chloride monomer is subjected for the grafting co-polymerization by suspension method in the presence of indicated impact viscosity modifying agent.

EFFECT: improved preparing method.

12 cl, 1 tbl, 4 ex

FIELD: cosmetics, chemical technology.

SUBSTANCE: invention relates to polymers with the branched block-polymer structure that are used for treatment of keratin-containing substrates, mainly, in cosmetic compositions, such hair lacquers, hair conditions, lotions for fixing hair stacking, creams and so on that comprise polymers. Block-copolymer for keratin-containing substrates is prepared by polymerization of polyfunctional monomer or monomers comprising at least two functional groups and wherein the reaction ability of one functional group is higher as compared with another functional group, the first unsaturated monomer or monomers based on ethylene and comprising from 2 to 30 carbon atoms that are polymerized preferably with functional group of a bifunctional monomer possessing the higher reaction ability to form A block, and the second unsaturated monomer or monomer based on ethylene and comprising at least one carboxyl group that are polymerized with functional group of a bifunctional monomer possessing the less reaction ability to form B block. Block A shows higher hydrophobic properties as compared block B and copolymer is characterized by at least two different vitrification temperature points. Using the proposed block-copolymer allows optimizing the required properties of compositions for hair stacking, such as light spreading on hair, prevention of hair wave falling, retention of stacking under conditions of high moisture, stickiness, rigidity, resistance against deposition for layers, capacity for stacking recovery, increase of hair volume and washing out from hair. Copolymer can be used for its incorporation in compositions for hair stacking with the low content of VOC based on an aqueous-alcoholic base that satisfy requirements by limitation of the VOC content.

EFFECT: improved preparing method, improved and valuable properties of polymer.

68 cl, 7 dwg, 11 tbl, 12 ex

FIELD: polymer production.

SUBSTANCE: in the first step of two-step polymer-polyol preparation, polyether, notably Laprol 5003 or Laprol 5003/Laprol 3003 mixture, is combined with polymer selected from group, including polystyrene, styrene-acrylonitrile copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene plastic, and mixtures thereof, at temperature 100°C. In the second step, at 90°C and pressure 0.2 MPa, monomer selected from group including acrylonitrile, styrene, acrylate, vinylidene chloride, and mixtures thereof is added before addition of catalyst. Resulting mixture is stirred at 100-110°C and pressure 0.25 MPa.

EFFECT: enabled preparation of stable dispersion, reduced process cycle time, and lowered power consumption.

2 cl, 2 tbl, 5 ex

FIELD: polymers, in particular composition for molded articles useful in building materials.

SUBSTANCE: claimed composition contains (A) 100 mass pts of vinyl chloride-based resin; (B) from 1 to 30 mass pts of graft copolymer obtained by graft polymerization; (C) from 0.1 to 5 mass pts of methylmethacrylate-based polymer obtained by two-step method in presence of polymer, wherein 0.1 g of said polymer in 100 ml of chloroform has intrinsic viscosity (ηsp) at 30°C of 0.7 or more and contains 0-50 mass % of methylmethacrylate repeated units, and 0.1 g of in two step obtained polymer in 100 ml of chloroform has intrinsic viscosity (ηsp) at 30°C of 0.5 or more; and (D) from 1 to 20 mass pts of calcium carbonate.

EFFECT: articles with high processibility, whether resistance, impact resistance and luster.

5 cl, 19 ex, 3 tbl

FIELD: composite polymer biomedicine materials containing polymer binder, biocompatible filler and carbon reinforcing filler.

SUBSTANCE: claimed composition contains polymer binder, namely mixture of polymethylmethacrylate or methylmethacrylate copolymer with methylacrylate and monomer methylmethacrylate in ratio of polymer part to monomer from 1:0.3 to 1:0.5 mass pts (50-72 mass pts); peroxide initiator (0.05-0.5 mass pts): carbon continuous fibers of 200-1000 filaments made of hydratcellulose fiber of polyacrylonitrile fiber (2-10 mass pts); and hydroxyapatite as filler (25-40 mass pts). Method for production of material from claimed composition useful in manufacturing of jowl implants also is disclosed.

EFFECT: polymer material having natural bone-like properties.

3 cl, 10 ex, 1 tbl

FIELD: organic chemistry, impregnating compositions.

SUBSTANCE: invention relates to composition used for impregnation of a polishing disk. The composition for impregnation of polishing disk comprises a binding agent aqueous solution representing a mixture of an aqueous emulsion of co-polymer prepared by emulsion polymerization of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic acid amide with the content of basic substance 50 ± 5%, liquid water glass and oxyethylated lanolin in the following ratio of components, mas. p. p.: copolymer of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic acid amide as measure for dry residue, 15-50; liquid water glass, 3-12; oxyethylated lanolin, 1-6, and water, 45-105. Invention provides enhancing stability and to reduce cost in making the polishing disk.

EFFECT: improved and valuable properties of composition.

2 tbl, 4 ex

FIELD: polishing materials.

SUBSTANCE: invention relates to manufacturing cotton polishing disks based on friction effect. The composition for making polishing disks comprises a binding agent aqueous solution wherein an aqueous emulsion of copolymer 15-50% of its total mass is used and prepared by emulasion polymerization of butyl acrylate, ethyl acrylate, methyl methacrylate and acrylic acid amide in the ratio, mas. p. p.: butyl acrylate, 140-160; ethyl acrylate, 140-160; methyl methacrylate, 205-231; acrylic acid amide, 17-19. Invention provides enhancing durability of polishing disks and to reduce cost in their making. Invention can be used for polishing table dishware and their parts made of stainless, devices for dental practice, jewelry articles, watches and so on.

EFFECT: improved and valuable properties of composition.

2 tbl, 9 ex

FIELD: polymer materials.

SUBSTANCE: composition contains, wt %: vinylidene fluoride 20-40, methyl methacrylate homopolymer or copolymer, acryl elastomer 5-18, and UV-absorbing substance 1-4. Invention also discloses jointly extruded films (options) and substrates covered by these films. Invention enables preparing composition with not rising UV-absorbing substances and manufacturing films showing high mechanical strength and providing high-quality adhesion to substrate while being resistant to radiation.

EFFECT: improved consumer's properties of films.

14 cl, 7 ex

The invention relates to a device for receiving the sheet of polymeric materials in vertical forms

The invention relates to a method and apparatus for receiving a sheet of polymeric materials in vertical forms

The invention relates to polymeric compositions based on acrylic resins designed for fixing anchor bolts in concrete and bonding of concrete and reinforced concrete structures

The invention relates to compositions for coextrusion with poly (vinylidene fluoride) - based poly (vinylidene fluoride) (PVDF), polyalkylacrylate and acrylic and/or methacrylic elastomer, providing adhesion PVDF polymer incompatible polymer resin

FIELD: chemistry.

SUBSTANCE: invention relates to impregnation and hermetisation of porous products with thermally hardened compositions based on (meth)acrylic monomers. Claimed is thermally hardened composition for impregnation and hermetisation of porous products, containing (in mass fraction): 100 (meth)acrylic monomer, 0.1-0.5 nitronitrile, 0.01-0.04 hydrohynone, 0.004-0.03 disodium salt of ethylendiaminetetraacetic acid, 0.001-0.03 2,2,6,6-tetramethyl-4-oxopiperidin-1-oxyl and 0.5-5.0 non-ionogenic emulsifying agent. Method of impregnation and hermetisation of porous products includes their vacuum processing with further impregnation under vacuum and atmospheric pressure with abovementioned composition and hardening at temperature ≥90°C. Thermally-hardened composition has higher serviceability and allows to increase productivity of impregnation and hermetisation method essentially.

EFFECT: increasing productivity of method of impregnation and hermetisation of porous products by means of thermally-hardened compositions.

2 cl, 1 tbl, 15 ex

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