Dimeric surfactant-containing dispersion powdered compositions

FIELD: chemistry.

SUBSTANCE: invention relates to dispersion powdered compositions re-dispersed in water, a method of preparing said compositions, as well as to their use in construction materials. The composition is prepared based on polymers of one or more ethylene unsaturated monomers. The composition additionally contains one or more dimeric surfactants in form of alkyne derivatives, an one or more protective colloids. Powdered compositions are obtained through emulsion or suspension polymerisation of one or more ethylene unsaturated monomers. The reaction takes place in an aqueous medium followed by drying the obtained aqueous dispersions, while adding one or more dimeric surfactants.

EFFECT: use of obtained powdered compositions in self-levelling filler or fluid solutions for making seamless floors, prevents formation of irregularities, depressions and small pores on the surface, as well as formation of air pockets in the deposited layer.

18 cl, 2 tbl, 12 ex

 

The present invention relates to redispersible in water dispersion powder compositions containing dimeric surfactants (surfactant), the method of production of such powder compositions, and to their use in construction materials, primarily in samarasekara the filler for floors and fluid solutions for the manufacture of seamless floors.

Polymers based on vinyl esters, vinylchloride, Monomeric (meth)acrylates, styrene, butadiene and ethylene, primarily in the form of their aqueous dispersions or holder of polymer powders in water, various applications, such as coatings or adhesives for a variety of foundations. In mortar, for example, on the basis of cement or plaster, use stabilized by a protective colloid dispersion powders to improve the adhesion strength, improve wear resistance, high resistance to scratching or enhance the tensile strength in bending (Tonindustrie-Zeitung 9, 1985, s). Such dispersion powders are described, for example, in DE 2049114, get a spray drying of aqueous dispersions of polymers adding polyvinyl alcohol and other auxiliary components. Thus obtained has good flowability of the powders with a particle size of from 10 to 250 microns at their redispersion in the water again about the will is formed of a dispersion with a particle size of the dispersed phase from 0.1 to 5 μm. Such restored dispersion for the possibility of their application in the above order should remain stable over a long period of time, i.e. they should not be prone to sedimentation (stratification).

One of the important applications of polymer powders are hydraulically setting samarasekara putty for flooring. Such fillers are known from DE 3028559 and DE 10061410 and in General consist of cement or mixtures of different cements, carefully selected combinations of fillers, polymer powders, thinners, and optionally other additives. Samarasekara putty for flooring are usually produced in the form of dry mixtures, which are directly on the site just shut water and the resulting solution is poured Foundation. Applied on the base layer spreads over it, forming a smooth surface, which is either directly used as the exploited cover, or used as the basis for applying other coatings. However, when applying such llers layers of increased thickness can be certain problems. Thus, in particular, on the surface of the applied layer can be formed irregularities, such as depressions (craters), small pores, resembling a pin punctures, or in zdeshnie enable, when the corresponding load on the floor potentially represent its increased wear. To eliminate such defects of the surface has to be subjected to additional processing.

In order to avoid the formation of such irregularities on the surface of the coating to the present time have used the relevant Supplement. Thus, in particular, in EP 0477900 for these purposes, it is recommended to use a fully saponified copolymers of 1-alkylvinyl ethers and vinyl esters. However, such additives are difficult and time consuming to obtain, from the economic point of view is a significant lack of relevant, containing dispersion powder compositions.

In EP 1133456 described an alternative approach to solving this problem, consisting in the use of the dispersion powder based on the product of polymerization vinylaromatic compounds and 1,3-diene. However, in the polymerization of these monomers form volatile by-products (compounds formed by the reaction of the Diels-alder reaction), which cannot be completely removed during polymerization and are therefore highlighted in the subsequent use of polymer powders, respectively derived products. Such volatile substances have an intense odor and therefore lead to a strong Sagatova the property of their locations. This factor is a significant drawback in General, and especially when using product for flooring in large areas.

Based on the foregoing, the present invention was based on the objective to offer an alternative dispersion powder compositions that when used in building materials, especially in samarasekara the product for flooring or fluid solutions for the manufacture of seamless floors, would rule out the formation on the surface of the applied coating irregularities, depressions (craters) or fine pores in the form of a pin punctures, as well as the emergence in the deposited layer of air inclusions.

The object of the invention in accordance with this are redispersible in water dispersion powder compositions based on polymers of one or more ethylene unsaturated monomers, characterized in that they contain one or more dimeric surfactants (surfactant).

Dimeric surfactants form a special class of surface-active substances. Dimeric surfactants consists of two hydrophilic head groups, which are interconnected by a spacer and each of which carries a predominantly hydrophobic tail group.

Dimeric surfactants have a number of advantages over conventional surface-active substances is AMI, have only one hydrophilic head group is associated with one hydrophobic tail group. Dimeric surfactants are used as defoamers or surfactants primarily in coatings of any type on the basis of water (JCT Research, vol. 3, No. 1, 2006, s-85, US 2287290, US 3325425, DE 10326127, DE 102004047118 or DE 19535833).

The preferred dimeric surfactants are askinosie derivatives containing two alcohol groups. To the preferred dimeric surfactants are also Allendale derivatives, in which one of the two alcohol groups or both are substituted polietilenglikolya remains. The preferred dimeric surfactants are further reaction products of epoxides with Allendale derivatives in which one or both alcohol groups can be transformed epoxides.

Particularly preferred dimeric surfactants include alkynes General formula (1)

in which each of R and R1represents a linear or branched, substituted or unsubstituted alkyl, aryl or alkoxyalkyl residue with 1-10 carbon atoms, and

R2represents a hydrogen atom or polietilenglikolya chain of the formula (CH2-CH2-O)n-CH2-CH2Is HE, where n denotes a number from 0 to 50. All of the above substituents in the General formula (1) are not awesime from each other values.

In a preferred embodiment, R represents a hydrocarbon residue with 1-6 carbon atoms, especially isobutyl, butyl or propyl. In a preferred embodiment, R1represents a hydrocarbon residue with 1-6 carbon atoms, especially methyl or ethyl. In a preferred embodiment, R2represents a hydrogen atom.

One of the most preferred dimeric surfactant is alcindoro derivative of the formula (2), also known as Surfynol 104 (trade name of product manufactured by Air Products):

Particularly preferred dimeric surfactants are the reaction products of epoxides with alkynes of General formula (1)in which R2in each case represents a hydrogen atom, and either one or both of an alcohol group can be transformed epoxides.

The most preferred dimeric surfactants are the reaction products of epoxides of the General formula (3)

in which the residues R3independently of one another represent hydrogen atoms or linear or branched, substituted or unsubstituted alkyl residues with 1 to 10 carbon atoms, with alkantiolsul derivative of the formula (2), in which either one or both of an alcohol group can be transformed by the epoxides of General formula ().

Particularly preferred dimeric surfactants are further Allendale derivatives of the General formula (4)

in which R1represents a hydrogen atom or a linear, branched or cyclic alkyl residue with 1-6 carbon atoms,

R2represents a linear, branched or cyclic alkyl residue with 1 to 12 carbon atoms,

R3represents a hydrogen atom or a residue -- CH2OR4,

R4represents a linear, branched or cyclic alkyl, alkanniny, aryl or Uralkaliy balance with 2-30 carbon atoms

and

the sum (n+m) takes the average value from 1 to 100, and

the sum (p+q) takes an average value of from 0.5 to 5.

In a preferred embodiment, R1in the General formula (4) represents a methyl residue, a R2represents a linear, branched or cyclic alkyl residue with 1-6 carbon atoms. Particularly preferably, R1represents a methyl residue, a R2represents a linear, branched or cyclic alkyl residue with 4-5 carbon atoms. Most preferably, R2represents isobutylene or isoamylene the rest.

In a preferred embodiment, R4in the General formula (4) represents a linear is, branched or cyclic alkyl, alkanniny, aryl or Uralkaliy balance with 2-30 carbon atoms, particularly preferably a linear, branched or cyclic alkyl, alkanniny, aryl or Uralkaliy residue with 4 to 12 carbon atoms. As an example, the preferred residues R4can be called ethyl, butylene, hexylene, the, 2-ethylhexyl, modelline, octadecyl, phenyl or kreselnye residues. Particularly preferred residues R4are butylene, 2-ethylhexyl and modelline residues. The sum (n+m) in the preferred embodiment, takes the values from 1 to 50, particularly preferably from 10 to 30. The sum (p+q) in the preferred embodiment, takes the values from 1 to 3, particularly preferably 2.

One of the most preferred dimeric surfactants of General formula (4) is the reaction product obtained by the interaction of two equivalents of oxirane [[(2-ethylhexyl)oxy]methyl] with a simple ester of polyethylene glycol and one equivalent alcindoro derivative of the formula (2). The latter is also known as Surfynol®MD-20 (trade name of product manufactured by Air Products).

The share of dimeric surfactants in the total mass of the dispersion powder composition has from 0.01 to 5.00 wt.%, preferably from 0.1 to 2.0 wt.%, especially predpochtitel is but from 0.1 to 0.8 wt.%.

To the preferred basic polymers for the holder in the water dispersion powder compositions include polymers based on one or more ethylene unsaturated monomers selected from the group comprising vinyl esters of carboxylic acids with 1-15 carbon atoms, methacrylates or acrylates carboxylic acids or an unbranched or branched alcohols with 1-15 carbon atoms, olefins or dieny, vinylaromatic connection and vinylchloride.

To the preferred vinyl esters are vinyl acetate, finalproject, vinylboronate, vinyl 2-ethylhexanoate, vanillaware, 1-methylphenylacetic, vinylbilt and vinyl esters of α-branched monocarboxylic acids 5-13 carbon atoms, for example the products VeoVa9®or VeoVa10®(trade names of products manufactured by Shell). Particularly preferred among the above vinyl esters are vinyl acetate.

For your preferred methacrylates or acrylates are esters of unbranched or branched alcohols with 1-15 carbon atoms, such as methyl acrylate, methyl methacrylate, acrylate, methacrylate, propylacetate, propylbetaine, n-butyl acrylate, n-butylmethacrylate, 2-ethyl hexyl acrylate and norbornylene. Particularly preferred of them are methyl acrylate, methyl methacrylate, n-butyl acrylate and 2-ethyl hexyl acrylate.

For your preferred olefins or Tienam include ethylene, propylene and 1,3-butadiene. As vinylaromatic preferred compounds styrene and vinyltoluene. The preferred vinylchloride is vinyl chloride.

If necessary, the basic polymer can also copolymerizate auxiliary monomers in an amount of from 0.05 to 50 wt.%, preferably from 1 to 10 wt.%, in terms of the total weight of the basic polymer. As such auxiliary monomers can be used, for example, ethylene unsaturated mono - and dicarboxylic acids, preferably acrylic acid, methacrylic acid, fumaric acid and maleic acid, amides and NITRILES of ethylene unsaturated carboxylic acid, preferably acrylamide and Acrylonitrile, mono - and diesters of fumaric acid and maleic acid such as the diethyl and diisopropyl esters, and also maleic anhydride, ethylene unsaturated sulfonic acids, respectively, and their salts, preferably vinylsulfonic and 2-acrylamide-2-methylpropanesulfonate. As other examples are pre-stitched comonomers, such as ethylene polyunsaturated comonomers, such as divinerecipes, diallylmalonate, alismataceae or treelistener or secondary link comonomers, such as acrylamide is glycolic acid (AHAs), methyl ether methylacrylamide acid (MAMAC), N-methylolacrylamide (N-MA), N-methylolmethacrylamide (N-MMA), N-metroselskabet, simple alkalemia esters, such as isobutoxide, or esters of N-methylolacrylamide, N-methylolmethacrylamide and N-methylolacrylamide. For use in these purposes is also suitable comonomers with epoxy functional groups, such as glycidylmethacrylate and glycidylmethacrylate as other examples of the comonomers with silicon functional groups, such as Acrylonitrile(alkoxy)- and methacryloxypropyl(alkoxy)silanes, vinyltriethoxysilane and fenilmetilketil that as alkoxygroup can contain, for example, metoxygroup, ethoxypropan and groups simple ethoxypropionitrile esters. In addition, you can also use monomers with hydroxy or CO groups, for example hydroxyalkyl esters of methacrylic and acrylic acids, such as hydroxyethyl-, hydroxypropyl - or hydroxyethylacrylate or-methacrylate, and also compounds such as diacetonitrile and acetylacetoneiminates or-methacrylate. As other examples can be called forth a simple vinyl esters, such as methyl-, ethyl - or isobutylphenyl esters.

As an example, suitable for use in the above a is x Homo - and copolymers can be called the homopolymers of vinyl acetate, copolymers of vinyl acetate with ethylene, copolymers of vinyl acetate with ethylene and one or more other complex vinyl esters, copolymers of vinyl acetate with ethylene and acrylates, copolymers of vinyl acetate with ethylene and vinyl chloride, copolymers of styrene with acrylates and copolymers of styrene with 1,3-butadiene.

It is preferable to use homopolymers of vinyl acetate, copolymers of vinyl acetate with 1 to 40 wt.% ethylene, copolymers of vinyl acetate with 1 to 40 wt.% ethylene and 1-50 wt.% one or more other comonomers from the group comprising a complex of vinyl ethers with 1 to 12 carbon atoms in the carboxyl residue, such as WikiProject, vanillaware, vinyl esters of α-branched carboxylic acids 5-13 carbon atoms, such as products VeoVa9®, VeoVa10®, VeoVa11®, copolymers of vinyl acetate with 1 to 40 wt.% ethylene and preferably 1-60 wt.% acrylate unbranched or branched alcohols with 1-15 carbon atoms, especially n-butyl acrylate or 2-ethylhexyl acrylate, and copolymers with 30-75 wt.% vinyl acetate, 1-30 wt.% vanillaware or vinyl ester of α-branched carboxylic acid having 5 to 13 carbon atoms, and 1-30 wt.% acrylate unbranched or branched alcohols with 1-15 carbon atoms, especially n-butyl acrylate or 2-ethylhexyl acrylate, which may additionally contain 1-40 wt.% this is Jena, copolymers of vinyl acetate with 1 to 40 wt.% ethylene and 1-60 wt.% vinyl chloride, each of these polymers can additionally contain another, and the above described auxiliary monomers in the stated quantities, as given in wt.% values that define the content of each component in the composition of the corresponding copolymer, the amount in each case add up to 100 wt.%.

It is preferable to use polymers of (meth)acrylates, such as copolymers of n-butyl acrylate or 2-ethylhexyl acrylate or copolymers of methyl methacrylate with n-butyl acrylate and/or 2-hexyl acrylate and under certain conditions, with ethylene, copolymers of styrene and acrylates with one or more monomers from the group comprising methyl acrylate, acrylate, propylacetate, n-butyl acrylate and 2-ethyl hexyl acrylate, copolymers of vinyl acetate and acrylates with one or more monomers from the group comprising methyl acrylate, acrylate, propylacetate, n-butyl acrylate, 2-ethyl hexyl acrylate and under certain conditions, ethylene, and copolymers of styrene with 1,3-butadiene, with each of the polymers can additionally contain another, and the above described auxiliary monomers in the stated quantities, as given in wt.% values that define the content of each component in the composition of the corresponding copolymer, the amount in each case the amount to 100 wt.%.

Monomers, respectively, the mass content of comonomers is selected when this so that the glass transition temperature Twithpolymer, as a rule, were in the range from -50 to +50°C, preferably from -30 to +40°C. the glass transition Temperature Twithpolymers can be defined in the usual way by the method of differential scanning calorimetry (DSC). Approximate values of glass transition temperature Twithyou can also pre-calculated using equation Fox (Fox). In accordance with the method of Fox (T.G. Fox, Bull. Am. Physics Soc. 1, 3, 1956, p.123) the glass transition temperature can be calculated by the following formula:

1/Twith=x1/Tc1+x2/TC2+...+xn/Tcn,

where xndenotes the mass fraction (wt.%/100) of the monomer n, and Tcndenotes expressed in degrees Kelvin glass transition temperature of homopolymer monomer n. The values of glass transition temperature Twithfor homopolymers are listed in Polymer Handbook Handbook, 2nd ed., published by J.Wiley & Sons, New York, 1975.

Another object of the present invention is a method of obtaining a holder in water dispersion powder composition by emulsion or suspension polymerization of one or more ethylene unsaturated monomers in the aqueous medium, followed by drying thus obtained aqueous dispersions, featuring the the action scene, to add one or more dimeric surfactants.

The polymers are preferably obtained by the method of emulsion polymerization. The polymerization is preferably carried out at a temperature in the range from 40 to 100°C., particularly preferably from 60 to 90°C. the Copolymerization of gaseous comonomers such as ethylene, 1,3-butadiene or vinyl chloride, can also be performed under pressure, usually under pressure in the range from 5 to 100 bar.

The initiate polymerization using commonly used in emulsion, respectively, suspension polymerization are soluble in water, respectively, are soluble in the monomers, initiators, or combinations of redox initiators. As an example, water-soluble initiators can be called sodium, potassium and ammonium salts peroxidizing acid, hydrogen peroxide, tert-butylperoxide, tert-butylhydroperoxide, peroxodisulfate potassium tert-butylperoxide, cumonherface, isopropylbenzaldehyde, azobisisobutyronitrile. As an example, are soluble in the monomers, initiators can be called dicetylperoxydicarbonate, dicyclohexylperoxydicarbonate or Dibenzoyl peroxide. These initiators are usually used in amounts of from 0.001 to 0.02 wt.%, preferably from 0.001 to 0.01 wt.%, in each case, in paresce the e on the total weight of the monomers.

As redox initiators used the above initiators in combination with reducing agents. It is suitable for use in this purpose, the reducing agents are the sulfites and bisulfite alkali metals and ammonium, for example sodium sulfite, the derivatives sulfoxylates acid, such as formaldehydeinduced zinc or alkali metals, such as hydroxymethanesulfinic sodium and ascorbic acid. For this purpose, the reducing agent is usually used in amounts of from 0.001 to 0.03 wt.%, preferably from 0.001 to 0.015 wt.%, in each case, calculated on the total weight of the monomers.

To regulate the molecular weight during the polymerization it is possible to apply the so-called growth regulators chain. When using these growth regulators chain they are usually used in amounts of from 0.01 to 5.0 wt.% in terms of the polymerized monomers and injected into the reaction system separately or pre-mixed with other reagents. As examples of such substances can be called n-dodecylmercaptan, tert-dodecylmercaptan, mercaptopropionic acid, methyl ester mercaptopropionic acid, isopropanol and acetic aldehyde.

It is suitable for use in the polymerization of protective colloids are polyvinyl alcohols, polyvinylacetal, polyvinylpyrrolidone, polisaharidy in water-soluble form, such as starches (amylose and amylopectin), celluloses and their carboxymethyl, metal, hydroxyethylene and hydroxyproline derivatives, dextrins and cyclodextrins, proteins, such as casein or Caseinate, soybean protein, gelatin, ligninsulfonate, synthetic polymers, such as poly(meth)acrylic acid, copolymers of (meth)acrylates and comonomeric links with functional carboxyglutamic, poly(meth)acrylamide, polyphenylsulfone acids and their water-soluble copolymers, melamineformaldehyde, naphthaleneformaldehyde, copolymers of styrene with maleic acid, and copolymers simple vinyl ether with maleic acid.

It is preferred for use provided by the invention include partially or completely saponified polyvinyl alcohols with a degree of hydrolysis of from 80 to 100 mol.%, first of all partially saponified polyvinyl alcohols with a degree of hydrolysis of from 80 to 95 mol.%, and with a viscosity determined using a viscometer of Heppler in 4%aqueous solution, from 1 to 30 MPa·s (method for the determination of viscosity using a viscometer of Heppler at a temperature of 20°C., DIN 53015). Preferred partially saponified hydrophobically modified polyvinyl alcohols with a degree of hydrolysis of from 80 to 95 mol.% and with a viscosity determined using a viscometer Hepple is a 4%aqueous solution, from 1 to 30 MPa·S. as examples of such polyvinyl alcohols can be called partially saponified copolymers of vinyl acetate with hydrophobic comonomers, such as isopropenylacetate, vinylbilt, vinylethylene, vinyl esters of saturated α-branched monocarboxylic acids with 5 or 9-11 carbon atoms, diallylmalonate and dialkylphosphate, such as Diisopropylamine and Diisopropylamine, vinyl chloride, simple mineralquelle esters, such as vinylboronic ether, olefins, such as Aten and the mission. The proportion of hydrophobic units should preferably be from 0.1 to 10 wt.% in terms of the total weight of partially saponified polyvinyl alcohol. These polyvinyl alcohols can also be used as mixtures thereof.

The most preferred are polyvinyl alcohols with a degree of hydrolysis of from 85 to 94 mol.% and the viscosity determined using a viscometer of Heppler in 4%aqueous solution, from 3 to 15 MPa·s (method for the determination of viscosity using a viscometer of Heppler at a temperature of 20°C., DIN 53015). These protective colloids can be obtained with known methods and add them to polymerization in number, usually a total of from 1 to 20 wt.% in terms of the total weight of the monomers.

When carrying out the polymerization in the presence of emulsifiers them if estvo must be from 1 to 5 wt.% in recalculation on weight of monomers. It is suitable for use in these purposes the emulsifiers are as anyone and cationic and nonionic emulsifiers, for example anionic surfactants, such as alkyl sulphates with chain length from 8 to 18 carbon atoms, sulfates simple alilovic or alkylaryl esters containing from 8 to 18 carbon atoms in the hydrophobic residue and up to 40 ethylene or propyleneoxide units, alkyl - or alkylarylsulfonates with 8-18 carbon atoms, esters and palefire sulfonterol acids and monohydroxy alcohols or ALKYLPHENOLS, or nonionic surfactants, such as simple alkylpolyglycoside esters or simple alkylarylsulphonate esters with 8-40 ethylenoxide links.

Upon completion of the polymerization of the residual monomers can be removed using known methods additional polymerization, usually by additional polymerization initiated oxidation catalyst-recovery. The remains volatile monomers can also be removed by distillation, preferably under reduced pressure, and, if necessary, by passing through the system or on the system inert carrier gas, such as air, nitrogen or water vapor.

The solids content in the resulting by such aqueous dispersions ranges from 30 to 75 wt.%, preferably from 50 to 60 wt.%.

In some cases, as a protective Collot the species in the polymerization can also be used insoluble in water, film-forming received by polyprionidae and polycondensation polymers, such as polyurethanes, simple and complex polyesters, polyamides, melamine-formaldehyde resin, naphthaleneformaldehyde resin, phenol-formaldehyde resin, under certain conditions - and their oligomeric forproducts.

To obtain holder in water polymer powders, aqueous dispersions, optionally after addition of protective colloids as contributing to the drying auxiliary agents, is dried, for example by drying in the fluidized bed, freeze drying or spray drying. It is preferable to dry the dispersion by spray drying. Spray drying is carried out in the normal intended for these purposes, installations for spraying dispersions can be used one-, two - or multi-component nozzles or centrifugal atomizer (rotating disk). The temperature output depending on the type of installation, the glass transition temperature of the resin and the desired degree of drying is usually chosen in the range from 45 to 120°C, preferably from 60 to 90°C.

Contributing to the auxiliary drying agent (protective colloid) is usually used in a total amount of from 3 to 30 wt.% in terms of the number of polymer components of variance. The more preferable to use sposobem the store drying auxiliary agent in an amount of 5 to 20 wt.% in terms of the number contained in the dispersions of the polymers.

It is suitable for use in the above order to facilitate the drying of the auxiliary agents include partially saponified polyvinyl alcohols, polyvinylpyrrolidone, polysaccharides in water-soluble form such as starches (amylose and amylopectin), cellulose and its carboxymethyl, metal, hydroxyethylene and hydroxyproline derivatives, proteins such as casein or Caseinate, soybean protein, gelatin, ligninsulfonate, synthetic polymers, such as poly(meth)acrylic acid, copolymers of (meth)acrylate and a monomer unit with a functional carboxyglutamic, poly(meth)acrylamide, polyphenylsulfone acids and their water-soluble copolymers, melamineformaldehyde, naphthaleneformaldehyde, copolymers of styrene with maleic acid, and copolymers simple vinyl ether with maleic acid. As conducive to drying auxiliary agents prefer not to use any other protective colloids also polyvinyl alcohols, which are both preferred protective colloids, and preferred to facilitate the drying auxiliary agents.

Dimeric surfactants can be mixed with the ethylene unsaturated monomers to initiate polymerization. In another embodiment, the dimeric surfactant can be added in the process polymerizati the ethylene unsaturated monomers. Equally part dimeric surfactants can be added to the ethylene unsaturated monomers to initiate polymerization, and the rest of the dimeric surfactant should be added during the polymerization of the ethylene unsaturated monomers.

Dimeric surfactants are preferably added after completion of the polymerization process to the corresponding polymer dispersion. This dimeric surfactant is particularly preferably added to the polymer dispersion before drying. To this end one or more dimeric surfactant is added to aqueous dispersions of polymers and then received by such mixture is subjected to the drying methods described above. In one alternative particularly preferred options one or more dimeric surfactants can be added to an aqueous polymer dispersion and process of drying.

In another embodiment, already dried polymer powder can be mixed with one or several dimeric surfactants.

When sprayed in the drying of aqueous dispersions of polymers in the system, it is advisable, as it was installed, add the antifoam in number, reaching a maximum of 3 wt.% in terms of the amount of the basic polymer. To the obtained powders to improve their stability during storage by increasing resistance to caking, which relates to polymeric powders with a low glass transition temperature, t is to add the usual remedy against caking (also known as the anti-sintering) in an amount of preferably up to 30 wt.% in terms of the total weight of polymer components. As examples of such anti-caking can be called calcium carbonate, respectively, magnesium, talc, gypsum, silicic acid, kaolin, metakaolin, calcined kaolin and silica with a particle size predominantly from 10 nm to 100 μm.

Viscosity is subjected to the drying of the mixture shall be determined by regulation of the content of solid substance in such a way that its value was less than 1500 MPa·s (viscosity according to Brookfield at 20 revolutions and 23°C.), preferably less than 500 MPa·s solids Content in the exposed drying of the mixture is more than 35%, preferably more than 40%.

To improve the operational and technical characteristics for dispersion when it is drying, you can optionally add other additives. Such other components of the dispersion powder compositions that are added to them in preferred embodiments of the invention, include, for example, pigments, fillers, foam stabilizers, water-repellent agents or thinners cement.

Proposed in the invention redispersible in water dispersion powder compositions suitable for use primarily in the construction products chemistry. Proposed in the invention of the dispersion powder compositions can be used individually or in combination with conventional dispersions of polymers or dispersion powder is mi, if necessary, together with a hydraulically setting astringent, such as cement (Portland cement, aluminous cement, trass cement, slag Portland cement, magnesia cement, phosphate cement), gypsum and liquid glass, in the manufacture of the flowing mass, construction adhesives, plasters, plaster, mortar for grouting joints, waterproofing slurries or paints. In the case of construction adhesives offer in the invention of the dispersion powder composition preferably used in the manufacture of adhesives for gluing tiles or heat adhesives for fastening elements used to create full insulation. Proposed in the invention of the dispersion powder composition is preferably applied at spreading the masses, among which particularly preferred samarasekara filler for the manufacture of floors and fluid solutions for the manufacture of seamless floors.

For use in spreading the masses offered in the invention of the dispersion powder composition is admixed to the respective formulations. The dispersion powder composition is preferably added in an amount of from 0.5 to 10 wt.%. Such formulations also contain inorganic, hydraulically setting binders, such as cement, gypsum or mixtures thereof, preferably cement, in an amount of 5 to 80 the AC.%. Other components of such formulations are inorganic fillers, such as sand, quartz powder, chalk, limestone, retained by the filter ash or mixtures thereof, in an amount of 5 to 80 wt.%. To further enhance the effective flowing property to the dry mixture, if necessary, you can add conducive to spreading brewed from it solution substances such as casein or thinners cement. All are given in wt.% data on the content of each component in all the cases specified in terms of 100 wt.% dry mass of the formulation of the corresponding spreading mass. Ready for use with the flowing mass is ultimately produced by adding water to the above dry mixture.

Ready to use with the flowing mass can be used to obtain self-leveling coatings. It is preferable to use such a flowing mass as samarasekara filler for floors or fluid solution for the manufacture of seamless floors.

Application of self-leveling coatings allows you to smooth, flatten and smooth out the appropriate basis. With this aim, ready for use with the flowing mass is poured on the appropriate basis, distributed uniformly on him and finally dried. Usually you get layers of thickness from 0.5 to 30.0 mm PR is degema in the invention of technology allows even at the application layer of greater thickness, for example, a layer thickness of 40.0 mm or even 50,0 mm, to obtain a smooth surface with extremely high mechanical strength and hardness.

Below the invention is explained in more detail by way of examples, which, however, do not limit its scope.

Examples

Obtaining the dispersion powder compositions

The powder was obtained by spray drying a mixture consisting of an aqueous dispersion of a copolymer of ethylene with vinyl acetate (solids content 50%), 8 wt.% polyvinyl alcohol with a degree of saponification of 88 mol.% and viscosity by viscometer of Heppler ranging from 4 to 13 MPa·s and not necessarily 0.4 wt.% appropriate additives is given in wt.% the data is specified in terms of the amount of a copolymer of ethylene with vinyl acetate.

The mixture was sprayed through a two-component nozzle with compressed air with a pressure of 4 bar. The resulting droplets were dried in a co-current heated to 125°C air. The obtained dry powder was mixed with 20 wt.% commercially available anti-caking.

Example 1

In this example, the received dispersion powder composition with alkantiolsul derivative of the following formula (2) (also known as Surfynol®104 (trade name of product manufactured by Air Products)) as an additive.

Note the R 2

In this example, the received dispersion powder composition with the product Surfynol®MD-20 (trade name of product manufactured by Air Products) as an additive. Surfynol®MD-20 is a reaction product of two equivalents of oxirane [[(2-ethylhexyl)oxy]methyl] with a simple ester of polyethylene glycol and one equivalent alcindoro derivative of the formula (2).

Comparative example 3

In this example, the received dispersion powder composition with the product Silfoam®SD 860 (trade name of product manufactured by Wacker Chemie) as an additive. Silfoam®SD 860 is sandipanirishi silicone antifoam based on organic components with small relative content organofunctional silicone oil.

Comparative example 4

In this example, the received dispersion powder without any additives.

Experimentally determined properties of the dispersion powder compositions of examples 1-2 and comparative examples 3-4 (see table 1), and investigated their technological and surface properties in samarasekara the filler for floors (see table 2).

Determination of strength of compacted powder (SRP)

To determine the strength of compacted powder of the investigated powder was filled in a steel tube with a screw the new connection, and then to the powder applied pressure due to the metal plunger. The powder was kept under the action of the applied load in an oven for 16 h at 50°C. After cooling to room temperature, the powder was removed from the tube and qualitatively evaluated its resistance to caking crushing unit, in which he had pressed. The resistance of the powder to caking classified as follows:

score 1 - very good resistance to caking,

grade 2 - good resistance to caking,

grade 3 - satisfactory resistance to caking,

point 4 - resistance to caking is missing, the powder after crushing loses flowability.

Characterization of sedimentation (HO)

Characteristics settling again prepared from dispersions of powders serve as a measure of redispersible holder of powders. The variance of the investigated powder with a content of 50 wt.%, prepared by re-dispersing in water when exposed to high shear forces. After that, the characteristics of sedimentation was determined using diluted re-prepared dispersions with solids content of 0.5 wt.%, to which 100 ml of this dispersion was placed in a graduated tube and determines the height of the settled layer of solid fazia settled layer of the solid phase in millimeters was measured after 24 hours Values larger than 7 mm, indicate poor redispersible powder (see table 1).

To study operational and technical properties of the used filler for floors the following composition, wt.%:

Portland20
detained by the electrostatic precipitator ash as filler4
quartz sand50
calcium carbonate as filler22,7
casein0,3

and optional additives specified in the examples according to the invention and in comparative examples.

Of the above components, filler for floors and indicated in the examples according to the invention and in the comparative examples of the additives by intensive mixing to prepare a dry mixture. Then this mixture was mixed with water (16-18 wt.% water to 100 wt.% dry mix) and intensively stirred. Thus obtained solution was poured on the film layer thickness of 4 mm

Example 5

In this example, the received filler for floors, using the dispersion powder composition of example 1 in quality is solid fuel additive (in the amount of 3 wt.% in terms of the total weight of filler for floors).

Example 6

In this example, the received filler for floors, using the dispersion powder composition of example 2 as an additive (in the amount of 3 wt.% in terms of the total weight of filler for floors).

Comparative example 7

In this example, the received filler for floors, using the dispersion powder composition of comparative example 3 as an additive (in the amount of 3 wt.% in terms of the total weight of filler for floors).

Comparative example 8

In this example, the received filler for floors using dispersion 1 powder composition of comparative example 4 as an additive (in the amount of 3 wt.% in terms of the total weight of filler for floors).

Comparative example 9

In this example, the received filler for floors containing 2,988 wt.% the dispersion powder composition of comparative example 4 and a 0.012 wt.% alcindoro derivative of the formula (2) (75%on the media, also known under the trade name Surfynol®104 and manufactured by Air Products) as additives, are given in wt.% content data which is specified in terms of the total weight of filler for floors.

Comparative example 10

In this example, the received filler for floors containing 2,988 wt.% the dispersion powder composition of comparative example 4 and a 0.012 wt.% product Surfynol®D-20 (trade name of product, manufactured by Air Products) as additives, are given in wt.% content data which is specified in terms of the total weight of filler for floors. Surfynol®MD-20 is a reaction product of two equivalents of oxirane [[(2-ethylhexyl)oxy]methyl] with a simple ester of polyethylene glycol and one equivalent alcindoro derivative of the formula (2).

Comparative example 11

In this example, the received filler for floors containing 0.12 wt.% product Surfynol®MD-20 as an additive given in wt.% content data which is specified in terms of the total weight of filler for floors. Surfynol®MD-20 is a reaction product of two equivalents of oxirane [[(2-ethylhexyl)oxy]methyl] with a simple ester of polyethylene glycol and one equivalent alcindoro derivative of the formula (2).

Comparative example 12

In this example, the received filler for floors without any additives.

The study of surface quality (KP)

The surface quality was evaluated visually according to the following scale:

score 1 - very smooth, without defects such as craters and pin punctures,

grade 2 - very smooth, without defects such as craters, a few

defects in the form of a pin punctures,

the grade 3 level, few defects, such as craters, numerous defects in the form of a pin puncture is in,

the grade 4 level, several defects such as craters, numerous defects in the form of a pin punctures.

Test for hardness and resistance to scratching (TSC)

Surface hardness and its resistance to scratching experienced applying scratch with a knife. This technique allows to obtain information about the durability of the filler.

These properties were evaluated by the following scale:

score 1 - very solid, extremely strong adhesion to the base, has a high resistance to scratching,

grade 2 - strong adhesion to the base, resistant to scratching,

grade 3 - medium firm, the average adhesion on the substrate, has a high resistance to scratching,

grade 4 - medium hardness, poor adhesion to the base, has a low resistance to scratching.

The results of tests of dispersion powder compositions, respectively, the dispersion of the powders on the strength of the compacted powder SRP, and determine their characteristics settling HO presented in table 1, and the results of the research the quality of the surface of KP obtained after applying the mortar, and tests of such surface hardness and resistance to scratching TSC presented in table 2.

Table 1:
The dispersion powder compositions
ExampleAdditiveSRPXO
1Surfynol®1042-31,9
2Surfynol®MD-201-21,8
Comparative example
3Silfoam®SD 86021,7
4-22,2

From the data in table 1 it follows that proposed in the invention of the dispersion powder compositions (table 1, examples 1 and 2) and the corresponding standard products (table 1, comparative examples 3 and 4) are comparable among themselves, are at a high level properties.

Its the same operational and technical properties proposed in the invention putty for the sexes (table 2, primary and 6) significantly outweigh putty, containing dispersion powder compositions with traditional additives (table 2, comparative example 7) or without additives (table 2, comparative example 8). Adding dimeric surfactants directly in the preparation of the dry mixture (table 2, comparative examples 9 and 10) to achieve the same high performance and technical properties, which have proposed in the invention putty for the sexes (table 2, examples 5 and 6), it is not possible.

In all cases, when building the solution was not added to the dispersion powder was obtained solutions caused from which the coating had a very poor surface quality and hardness (table 2, comparative examples 11 and 12). Especially poor were operational and technical properties of building a solution from comparative example 12 (table 2), which did not add any dispersion powder or dimeric surfactants.

Table 2:
Samarasekara filler for floors
ExampleThe powder from exampleKPTSC
51 23
6222
Comparative exampleThe powder of comparative example
7332-4
8444
9a)433
10b)433
11b)-33
12-43-4
Notes:
a)to samarasekara putty for floors added product Surfynol®104,
b)to camerastyle is to be filler for floors added product Surfynol ®MD-20.

1. Redispersion in water dispersion powder composition for use in building materials based on polymers of one or more ethylene unsaturated monomers, characterized in that it contains one or more dimeric surfactants (surfactants), which are used askinosie derivatives of the General formula (1)
,
in which each of R and R1represents a linear or branched, substituted or unsubstituted alkyl, aryl or alkoxyalkyl residue with 1-10 carbon atoms, a R2represents a hydrogen atom or polietilenglikolya chain of the formula (CH2-CH2-O)n-CH2-CH2-OH, where n denotes a number from 0.5 to 50, with each of the individual residues R, R1and R2is independent from other values and one or more protective colloids selected from polyvinyl alcohols, polyvinylacetate, polyvinylpyrrolidone, polysaccharides in water-soluble form such as starches, cellulose and their carboxymethyl, methyl, hydroxyethylene and hydroxypropyl derivatives, dextrins and cyclodextrins, proteins such as casein or Caseinate, soybean protein, gelatino, ligninsulfonate, synthetic polymers, such as poly(meth)acrylic the traveler acid, copolymers of (meth)acrylates and comonomeric links with functional carboxyglutamic, poly(meth)acrylamide, polyphenylsulfone acids and their water-soluble copolymers, melamineformaldehyde, naphthaleneformaldehyde, copolymers of styrene with maleic acid and copolymers simple vinyl ether with maleic acid, and ethylene unsaturated monomers selected from the group comprising vinyl esters of unbranched alkylcarboxylic acids with 1-15 carbon atoms, methacrylates and acrylates unbranched or branched alcohols with 1-15 carbon atoms, vinylaromatic compounds, olefins, diene and vinylchloride.

2. The dispersion powder composition according to claim 1, characterized in that for obtaining the polymer is one or more ethylene unsaturated monomers selected from the group comprising vinyl acetate, vinyl acetate, in combination with ethylene, vinyl acetate, in combination with vinyl esters of α-branched monocarboxylic acids 5-13 carbon atoms, vinyl acetate, in combination with a vinyl ether of 2,2-dimethylheptane acid and optionally ethylene, vinyl acetate, in combination with a vinyl ether of 2,2-dimethyloctane acid and optionally ethylene, vinyl acetate, in combination with vanillaware and optional ethylene and ethylene in combination with vinyl esters of α-RA is extensive monocarboxylic acids with 5-13 carbon atoms.

3. The dispersion powder composition according to claim 1, characterized in that for obtaining the polymer is one or more ethylene unsaturated monomers selected from the group comprising acrylate, methacrylate, propylacetate, propylbetaine, n-, ISO - or tert - butylmethacrylate, methyl acrylate, methyl methacrylate, n-, ISO - or tert - butyl acrylate, 2-ethyl hexyl acrylate and norbornylene.

4. The dispersion powder composition according to claim 1, characterized in that as a dimeric surfactants are used Allendale derivatives.

5. The dispersion powder composition according to claim 1, characterized in that as a dimeric surfactants are used Allendale derivatives in which one or both alcohol groups substituted polietilenglikolya remains.

6. The dispersion powder composition according to claim 1, characterized in that as a dimeric surfactants are the products of the reaction between epoxides and Allendale derivatives in which one or both alcohol groups can be transformed epoxides.

7. The dispersion powder composition according to claim 1, characterized in that as a dimeric surfactants are used askinosie derivatives of the General formula (1)in which R represents isobutylene, botilony or through the residue, and R1represents a methyl or ethyl residue.

8. The dispersion powder is first composition according to claim 1, characterized in that as a dimeric surfactants used alcindoro derivative of the formula (2)

or product Surfynol® MD-20, which represents the reaction product of two equivalents of oxirane [[(2-ethylhexyl)oxy]methyl] with a simple ester of polyethylene glycol and one equivalent alcindoro derivative of the formula (2).

9. The dispersion powder composition according to claim 1, characterized in that the proportion of dimeric surfactants in terms of the total weight of the dispersion powder composition has from 0.01 to 5.00 wt.%.

10. A method of obtaining a holder in water dispersion powder composition by emulsion or suspension polymerization of one or more ethylene unsaturated monomers in the aqueous medium, followed by drying thus obtained aqueous dispersions, characterized in that add one or more dimeric surfactants.

11. The method according to claim 10, characterized in that one or more dimeric surfactant is mixed with one or more ethylene unsaturated monomers, which then polimerizuet.

12. The method according to claim 10, characterized in that will polimerizuet one or more ethylene unsaturated monomers during polymerization add one or more dimeric surfactants.

13. The method according to claim 10, characterized in that one or more dimeric PA is mixed with the dried polymer powder.

14. The method according to claim 10, characterized in that one or more dimeric surfactant is mixed with the aqueous dispersions of the polymers and thus obtained mixture is dried.

15. The method according to claim 10, characterized in that the aqueous dispersion of polymer is dried in the drying process add one or more dimeric surfactants.

16. Application of the dispersion powder composition according to one of claims 1 to 9 in products construction chemicals.

17. Application of the dispersion powder composition according to one of claims 1 to 9 in spreading the masses, construction adhesives, adhesives for gluing tiles, thermal insulation adhesives for fastening elements used to create full insulation, plasters, plaster, mortar for grouting joints, waterproofing slurries or colors.

18. Application of the dispersion powder composition according to one of claims 1 to 9 in samarasekara the filler for floors or in fluid solutions for the manufacture of seamless floors.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: mixture contains two different polyolefin and ethylene/α-olefin copolymers. The ethylene/α-olefin copolymer is a block-copolymer containing at least one hard block and at least one soft block. The ethylene/α-olefin copolymer can function as a component which improves compatibility between two polyolefins which may be incompatible. The disclosed polymeric mixtures can be used in making various articles such as tyres, hoses, belts, linings, shoe soles, cast and moulded articles. Said mixtures are especially useful for applications requiring melt strength, such as big articles made by blow moulding, foam and bundled bars.

EFFECT: improved compatibility of mixtures.

27 cl, 10 dwg, 13 tbl, 40 ex

FIELD: chemistry.

SUBSTANCE: composition with multimodal distribution of molecular weight has density between 0.94 and 0.95 g/cm3 at 23°C and melt flow index (MFI190/5) between 1.2-2.1 dg/min in accordance with ISO 1133. The composition contains 45-55 wt % low molecular weight homopolymer A of ethylene, 30-40 wt % high molecular weight copolymer B of ethylene and another olefin containing 4-8 carbon atoms, and 10-20 wt % ultrahigh molecular weight copolymer C of ethylene and another olefin containing 4-8 carbon atoms. The composition has high processibillity and resistance to mechanical loads and breaking, especially at temperatures below 0°C.

EFFECT: flawless coating for steel pips has mechanical strength properties combined with high hardness.

10 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polymer moulding compositions meant for moulding screw fitments. The composition contains a copolymer of ethylene and 1-hexene with density between 0.947 and 0.962 g/cm3 and melt index between 2 and 8 g/10 min and another copolymer of ethylene and 1-hexene with density between 0.912 and 0.932 g/cm3 and melt index between 0.25 and 6 g/10 min. Difference in density of the two polyethylenes is equal to or greater than 0.03 g/cm3. Selection of the components enables to obtain polymer compositions which have sufficient resistance to cracking and impact strength at low production expenses and without loss of other necessary operational properties.

EFFECT: screw fittings made from the said composition have strength which conforms to requirements for maintaining pressure, particularly in bottles with carbonated drinks, as well as plasticity for providing an airtight seal without need for lining and without change in taste or smell of the contents of the bottle.

9 cl, 4 ex, 6 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polyethylene and articles made by injection moulding polyethylene. Polyethylene contains homopolymers of ethylene and/or copolymers with ethylene with molecular weight distribution Mw/Mn between 3 and 30, density of 0.945 - 0.965 g/cm3, average molecular weight Mw between 50000 g/mol and 200000 g/mol, high-load melt index (HLMI) between 10 and 300 g/10 min. The polymer contains 0.1-15 branches/1000 carbon atoms, where 1-15 wt % polyethylene with the highest molecular weight has degree of branching greater than 1 branch of side chains with length greater than CH3/1000 carbon atoms.The polyethylene is obtained using a catalyst composition which contains at least two different polymerisation catalysts, where A) is at least one hafnocene-based polymerisation catalyst (A2), and B) is at least one polymerisation catalyst based on an iron component, having a tridentate ligand which contains at least two ortho-, ortho-disubstituted aryl radicals (B). The disclosed polyethylene can be subjected to processing treatment on standard injection moulding apparatus.

EFFECT: articles obtained through injection moulding is uniform and can further be improved by increasing rate of injection moulding or high melting point.

9 cl, 2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polyolefin compositions which have high decolouration and impact resistance. The composition contains from 50 to less than 70 wt % crystalline propylene homopolymer, 13-28 wt % elastomeric ethylene and propylene copolymer and 10-22 wt % polyethylene. Total amount of the elastomeric copolymer and polyethylene in the composition is more than 30 wt %. The crystalline propylene homopolymer has polydispersity index ranging from 4 to 10 and amount of isotactic pentades (mmmm) measured using 13C-NMR method on a fraction which is insoluble in xylene at 25°C more than 97.5 mol %. The elastomeric ethylene copolymer is partially soluble in xylene at ambient temperature. The polymer fraction which is soluble in xylene has value of inherent viscosity, measured in tetrahydronaphthalene at 135°C, which ranges from 2 to 4 dl/g. Polyethylene has inherent viscosity ranging from 1 to 3 dl/g.

EFFECT: obtained polypropylene compositions have relatively low hardness, high impact resistance and high resistance to decolouration, which enables their use in the motor car industry, particularly in bumpers and interior finishing, packaging and household objects.

5 cl, 4 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: composition contains at least one high-molecular polyethylene and at least one low-molecular polyethylene component. The high-molecular polyethylene component of the composition has molecular weight distribution of approximately 6 to 9, content of short-chain branches less than approximately 2 branches per 1000 carbon atoms of the main chain and Mz - approximately 1100000 or greater. The ratio of weight-average molecular weight of the high-molecular polyethylene component to the weight-average molecular weight of the low-molecular polyethylene component is less than 20. The disclosed composition has density greater than 0.94 g/cm3, resistance to cracking under the influence of the surrounding medium greater than 600 hours and percentage swelling greater than 70%.

EFFECT: improved mechanical strength characteristics, suitable for blow moulding.

22 cl, 1 tbl, 16 ex

FIELD: chemistry.

SUBSTANCE: resin has melt index MI5 from 0.40 to 0.70 g/10 min and contains from 47 to 52 wt % low-molecular polyethylene fraction and from 48 to 53 wt % high-molecular polyethylene fraction, where the high-molecular polyethylene fraction includes a copolymer of ethylene and 1-hexene and 1-octene.

EFFECT: improved hydrostatic properties.

5 cl, 3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polyethylene mixed compositions, intended for film manufacturing, which include two or more different ethylene polymers, each of which has different degree of complexity of long chain branching. Polyethylene composition is practically linear and has average index of branching constituting 0.85 or less. In addition, composition has density 0.935 g/cm3 or less, dullness - 10% or less and stability to falling load impact - 100g/mm or more, determined according to ASTM D-1709 methodology.

EFFECT: polyethylene compositions possess definite combination of required properties and characteristics, good optic properties and strengthening characteristics.

15 cl, 1 dwg, 5 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention refers to making a moulded product for handling clean-room materials, intermediate products or end products, such as a container, a tray and a tool. The moulded product is made of resin compound prepared by mixing in melt cycloolefine polymer (A) 100 weight fractions chosen from the group including bicyclo[2.2.1]-2-heptene and its derivatives, tricyclo [4,3,0,12,5]-3-decene and its derivatives, and tetracyclo[4,4,0,12,5,17,10]-3-dodecene and its derivatives of vitrification temperature within 60 to 200°C, and amorphous or low-crystalline elastic copolymer (B(b1)) 1 to 150 weight fractions. Copolymer (B(b1)) is polymerised from at least two monomers chosen from the group including ethylene and a-olefin with 3 to 20 carbon atoms and vitrification temperature 0°C or lower. The compound contains radical polymerisation initiator 0.001 to 1 weight fractions containing peroxide, and polyfunctional compound (D) 0 to 1 weight fractions. The compound (D) has at least two radical-polymerised functional groups chosen from the group including vinyl group, allylic group, acrylic group and methacrylic group in a molecule.

EFFECT: clean-room moulded product is characterised with good chemical stability, heat resistance and dimensional accuracy, it prevents volatile component release in the surrounding space, has good abrasion resistance and prevents particle formation.

19 cl, 1 tbl, 2 dwg, 12 ex

Polyethylene films // 2349611

FIELD: packing industry.

SUBSTANCE: invention relates to polyethylene films and first of all to bimodal polyethylene compositions designed for the production of films with low impurities content and increased manufacturability. The film contains polyethylene composition with the density of 0.940-0.970 g/cm3 and melt index value (I21) measured according to ASTM-D-1238-F technique 190°C/21.6 kg, from 4 to 20 dg/min. The polyethylene composition contains a high-molecular component with the average molecular weight more than 50000 and a low-molecular component with the average molecular weight less than 50000.

EFFECT: definite combination of the composition polymer characteristics meets the commercial requirements to the production of polyethylene films suitable for manufacturing the films by moulding, blow formation and other methods, the films are characterised by improved operational parameters along with high film quality that is revealed by low gel fraction content and simultaneous retention of strength, flexibility and impact resistance values.

28 cl, 7 dwg, 6 tbl, 12 ex

FIELD: construction.

SUBSTANCE: composition for coats contains isocyanate prepolymer produced by interaction of 4,4'-diphenylmethanediisocyanate and oligodiendiol with molecular weight of 2800-3200, content of hydroxyl groups 0.88-1.3% at the ratio of isolcyanate and hydroxyl groups of 4:1 with content of isocyanate groups in prepolymer of 8.0-9.7%, wt parts - 15-70, base - rubber composition from low-molecular hydroxyl-containing rubber, plasticiser, filler, anti-ageing agent and pigment - 100, catalyst of urethane production - 0.05-0.15 and glycerin 0.7-3.0.

EFFECT: higher strength, hardness and relative extension of coats.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethane composition used as a protective coating. The composition contains the following in pts. wt: 770 - polytetramethylene etherglycol with molecular weight of 1950, 200 - 4,4'-diphenylmethanediisocyanate, 80-100 - dimethylformamide, 36 - hydroxyl-containing compound, 100-120 - methylphosphite borate and 15-18 - glycidalmethacrylate. A prepolymer is synthesised first as an initial component by reacting polytetramethylene etherglycol and 4,4'-diphenylmethanediisocyanate in molar ratio OH:NCO-groups equal to 1:2.

EFFECT: composition has better complex properties, specifically high fire- and heat resistance and good physical and mechanical properties, eg high strength and extensibility.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to technology of obtaining films based on hydroxyl-containing polymers of increased fire resistance, particularly, to composition for obtaining films and can be applied in different areas of industry and agriculture for fireproof modification of materials based on them. Composition includes in weight fraction: 1.0-5.0 polyvinyl alcohol, 95.0-99.0 water, 0.5 methhylphosphate borate and 2.0 plasticiser. As plasticiser applied is glycerin, ethylene glycol or diethylene glycol.

EFFECT: invention ensures obtaining from said composition fire resistance films with increased durability.

2 tbl, 3 ex

FIELD: polymers.

SUBSTANCE: invention relates to methods for preparing powdery hygroscopic polymeric compositions. Invention proposes the powdery hygroscopic polymeric composition comprising a water-absorbing polymer (A) of cross-linked structure prepared by polymerization of unsaturated monomer comprising an acidic group and comprising acrylic acid and/or its salt as the main component. The composition comprises particles of size in limits from less 850 to 150 μm (but not including 850 μm) and their amount is 90 wt.-%, not less, of all material, and it comprises tetra- or the more functional and unmodified polyol (B) representing sugar alcohol showing functionality from 4 to 30, at least, on surfaces and taken in the amount from 0.01 to 20 wt.-%. Invention proposes variants of this composition and a method for its preparing. Invention provides development of powdery hygroscopic polymeric composition showing the low content of fine powder and possessing the excellent penetrability for liquids and ability to absorb liquid.

EFFECT: improved, enhanced and valuable properties of composition.

17 cl, 8 tbl, 3 dwg, 15 ex

FIELD: chemical technology, in particular plasticized composition based on polyvinylchloride for cable plasticate.

SUBSTANCE: claimed composition contains polyvinylchloride, dioctylphtalate, chloroparaffin, tribasic lead sulfate, calcium stearate, antimony trioxide, chalk, diphenylolpropane, carbon black and additionally contains metal-containing lubricant with acidic number at most 30 mg KOH/g. Lubricant is obtained by interaction of alpha-branched saturated monocarboxylic C10-C28-acids with polyhydric alcohol at 180-220°C in molar ratio of 1:(1-2) in presence of bivalent metal oxides: CaO, PbO, ZnO, MgO, BaO or two-component mixture thereof in ratio of 0.25-1:0.5-1, in amount of 0.5-2.0 mass % calculated as total reaction mass. As polyhydric alcohol ethylene glycol, glycerol, polyglycerol, which represents slop from glycerol distillation, are used.

EFFECT: articles with increased extension strength, elongation, heat resistance, improved appearance, decreased brittle point; resin composition assortment expansion.

2 cl, 16 ex, 1 tbl

The invention relates to the oil and gas industry and is used to limit water production through containment casing, the elimination of cross-flows and isolation supply interlayers in oil and gas wells
The invention relates to antifriction self-lubricating compositions based on polyethylene and can be used in various fields of mechanical engineering, instrument engineering, aircraft and shipbuilding, in particular for the manufacture of shell bearings, sliding guides without lubrication in the air

The invention relates to the production of firecells plastics (acrolaw) used in the production of packaging materials with antimicrobial activity, including extrusion and cast film, roll materials, consumer packaging (molded, thermoformed, die-inflatable), and other items in contact with food (grease, bread bins and other)

FIELD: chemistry.

SUBSTANCE: invention relates to a polycarbonate as substrate material for making transparent moulded articles. The polycarbonate is obtained through phosgenation of bisphenols at temperature 0-40°C and 5-17 mol % excess phosgene. The polycarbonate contains carbamate compounds of formula (1) , in which R1 and R2 denote hydrogen or C1-C12alkyl, or R1 and R2 - C4-C12 alkylidene or C4-C5 alkylidene, R3 and R4 denote hydrogen C1-C12 alkyl, mainly C1-C8 alkyl, phenyl, or R3 and R4, bonded to a carbon atom, together form cyclohexyl or trimethylcyclohexyl, R5 denotes hydrogen, C1-C12 alkyl, C5-C12 cycloalkyl, phenyl or cumyl.

EFFECT: invention enables to obtain polycarbonate with low content of carbamate compound impurities equal to 0,2-300 parts per million.

9 cl, 1 tbl, 8 ex

Up!