Method of multilayer co-extrusion

FIELD: process engineering.

SUBSTANCE: invention relates to protection of articles from thermoplastic polymer against scratches. Proposed method comprises application of protective layer by co-extrusion, or extrusion, or multi-moulding, and, at least, one thermoplastic polymer. Said protective layer comprises acrylic polymer including the following components in wt %: 80 - 99.8% of methyl methacrylate (MMA); 0 - 20%, of, at least, one copolymer capable of radical copolymerisation with MMA, and 0.2 - 10% of toxilic anhydride, or acrylic and/or methacrylic acid and, not obligatorily, anhydride groups of the following formula: wherein R1 and R2 stand for H- or methyl radical.

EFFECT: improved impact strength.

13 cl, 1 tbl, 6 ex

 

The present invention relates to a method of protecting a thermoplastic polymer through an acrylic polymer. The invention relates also to a multilayer structure comprising a thermoplastic polymer and an acrylic polymer, and uses this multilayer structure.

Some thermoplastic polymers, such as vysokozharoprochnyh polystyrene (HIPS), ABS (Acrylonitrile-butadiene-styrene) resin and PVC (PVC), are widely used in the manufacture of moldings, which are often encountered in everyday life (panel houses-trailers or mobile homes, extruded sections for Windows, doors or shutters and the like). Although these polymers have an acceptable level of mechanical strength and relatively inexpensive, they have poor resistance to aging (in the broadest sense, i.e. resistance to light, to scratching, to solvents and chemicals and so on). That is why today it is common practice to cover these plastic protective layer (surface layer)made of acrylic.

The applicant has discovered that certain acrylic polymers improve the resistance to scratching of the protective layer. In addition, when the protective layer should be resistant to impacts, it is common practice to add to acrylic polymer modifier impact strength, but this modifier impact strongly the ti has the effect of reducing resistance and scratch in the presence of the selected acrylic polymers. The applicant has found that it is possible to improve impact strength, while maintaining at the same time, good scratch resistance.

Prior art

US 5318737 and EP 0458520 A2 describe how co-extrusion (extrusion) of thermoplastic polymer with an acrylic resin ("Capstock" process), and this resin consists of MMA and C1-C4alkylacrylate, such as acrylate.

EP 1174465 B1 describes a "Capstock" a process in which acrylic resin used for the surface layer comprises from 10 to 95% emission spectra obtained for pure, from 0 to 60% of the impact strength modifier and from 5 to 40% acrylic additives. Emission spectra obtained for pure can be a polymer of MMA With1-C16alkylacrylate.

EP 1109861 B1 describes a "Capstock" a process in which acrylic resin used for the surface layer comprises from 50 to 99% of MMA and 1 to 50% of alkylacrylate, such as methyl-, ethyl - or butyl acrylate.

EP 1013713 A1 describes a "Capstock" a process in which acrylic resin used for the surface layer has a basis ester or amide of acrylic or a-alkylacrylate acid.

EP 0476942 A2 describes a "Capstock" the process in which the resin used for the surface layer is a mixture of acrylic resin and PVDF. The acrylic resin may be a copolymer of MMA/alkylacrylate.

EP 1350812 A2 describes a "Capstock" the process in which the resin used for the surface layer, predstavljaet a copolymer of MMA and C1-C4 alkylacrylate.

None of these documents describes a method according to the present invention.

BRIEF description of the INVENTION

The invention relates to a method of protecting a thermoplastic polymer, including the imposition of this order coextrusions, hot pressing or multivitamin forming:

the protective layer (I)comprising an acrylic polymer comprising by weight (the total is 100%):

- from 80 to 99.8% of methyl methacrylate (MMA);

from 0 to 20%, of at least one of the co monomer capable of radical copolymerization with MMA; and

from 0.2 to 10%:

maleic anhydride

or

acrylic and/or methacrylic acid and optionally anhydrous groups of the formula:

in which R1and R2denote H or a methyl radical;

layer of at least one thermoplastic polymer (II).

The invention also relates to a multilayer structure comprising a protective layer (I) and the layer of thermoplastic polymer (II), and to the use of multilayer structures for the manufacture of items and products for everyday use, such as:

housing or covers lawn mowers, chain saws, water bikes, household items;

- cover the trunks of cars, parts of the body structure;

- car registration plates;

panel exterior walls of houses-trailers, mobile the houses;

- the exterior panels of refrigerators;

panel showers;

the doors of buildings;

- window moldings;

- facing panels;

- doors equipment for domestic use (for example, the kitchen door).

The invention will be best understood by reading the detailed description below.

DETAILED description of the INVENTION

Definition

Tarticlemeans the glass transition temperature of the polymer. By extension, Tarticlehomopolymer obtained by radical polymerization of the monomer will be denoted as Tarticlethe specified monomer. For simplicity, the term methacrylate referred to as acrylate or methacrylate.

Meth(acrylic) monomer means a monomer, which may be:

acrylic monomer, such as alkylacrylate, preferably1-C10alkyl-, cycloalkyl or ailability, such as methyl-, ethyl-, propyl-, n-butyl-, isobutyl-, tert-butyl, 2-ethyl hexyl acrylate, hydroxyethylacrylate, such as 2-hydroxyethylacrylate, avialbility, such as 2-methoxyethylamine, alkoxy or aryloxypropanolamine, such as methoxypolyethyleneglycol or ethoxytrimethylsilane, aminoalkylsilane, such as 2-(dimethylamino)acrylate, silylation acrylates, glycidylmethacrylate;

methacrylic monomer, such as alkyl methacrylates, predpochtite the flax, With 1-C10alkyl-, cycloalkyl or allocability, such as methyl-, ethyl-, propyl-, n-butyl-, isobutyl-, tert-butyl, 2-ethylhexylacrylate, hydroxyethylmethacrylate, such as 2-hydroxyethylmethacrylate, firearmrelated, such as 2-methoxyethylamine, alkoxy or aryloxypropanolamine, such as methoxypolyethyleneglycol or ethoxypropionitrile, aminoalkylsilane, such as 2-(dimethylamino)ethyl methacrylate, silylation the methacrylates, glycidylmethacrylate.

Relative to the protective layer (I): it contains an acrylic copolymer comprising (by weight):

from 80 to 99.8% of methyl methacrylate (MMA);

from 0 to 20% and preferably from 0 to 10% of at least one of the co monomer capable of radical copolymerization with MMA;

from 0.2 to 10% of acrylic and/or methacrylic acid,

with a total value of 100%.

Preferably, the acrylic copolymer comprises (by weight):

from 80 to 99% of methyl methacrylate (MMA);

from 0 to 10% of at least one of the co monomer capable of radical copolymerization with MMA;

from 1 to 10% of acrylic and/or methacrylic acid,

with a total value of 100%.

Preferably capable of copolymerization monomer is a methacrylic monomer or vinylaromatic monomer, such as, for example, p is the roll, substituted styrene, alpha-methylsterol, monoliteral, tert-butalbiral.

Even more preferably, the acrylic copolymer comprises (by weight):

from 90 to 99% of methyl methacrylate (MMA);

from 1 to 10% of acrylic and/or methacrylic acid,

with a total value of 100%.

Two adjacent acid groups can interact by dehydration, giving anhydrite group of the formula:

in which R1and R2mean H or methyl radical. Dehydration can occur when during extrusion heat the copolymer. Therefore, the copolymer contains acrylic and/or methacrylic acid and, optionally, the above-described anhydrite group (formed from the group of acrylic and/or methacrylic acid by intramolecular dehydration).

According to one variant of the acrylic copolymer comprises maleic anhydride instead of acrylic and/or methacrylic acid.

The acrylic copolymer can be obtained by radical polymerization, carried out by a method in mass, in solution in a solvent or, alternatively, in the dispersion medium (suspension or emulsion). When using the method of polymerization in aqueous suspension of acrylic polymer is extracted in the form of beads that are approximately spherical. Part of the water is removed, then the polymer e is traderoute in the form of pellets, using a degassing extruder.

Impact strength of acrylic copolymer can be improved by at least one modifier impact strength. The extruder is mainly used to obtain a mixture. The impact strength modifier may be, for example, acrylic elastomer. Acrylic elastomer may be a block copolymer having at least one elastomeric block. They may, for example, be a styrene-butadiene-methylmethacrylate copolymer or a methyl methacrylate-butyl acrylate-methylmethacrylate copolymer. The impact strength modifier may also be in the form of small multi-layered particles (particles of core-shell), having at least one elastomeric (or soft) layer, i.e. a layer formed from a polymer having a Tarticlebelow -5°C, and at least one hard (or rigid) layer, i.e. formed from a polymer having a Tarticleabove 25°C.

Preferably the polymer with Tarticlebelow -5°C is obtained from a mixture of monomers comprising from 50 to 100 parts of at least one1-C10alkylmethacrylamide, from 0 to 50 parts capable of copolymerization monounsaturated co monomer, from 0 to 5 parts capable of copolymerization of a crosslinking monomer and 0 to 5 parts capable of copolymerization grafting monomer.

Preferably the polymer with TSt above 25°C is prepared from a mixture of monomers comprising from 70 to 100 parts of at least one1-C4alkylmethacrylamide, from 0 to 30 parts capable of copolymerization monounsaturated co monomer, from 0 to 5 parts capable of copolymerization of a crosslinking monomer and 0 to 5 parts capable of copolymerization grafting monomer.

With1-C10amylmetacresol is preferably butyl acrylate, 2,6-hexyl acrylate or octylacrylate. With1-C4alkylmethacrylamide preferably is methyl methacrylate. Copolymerization monounsaturated monomer can be1-C10the alkyl(meth)acrylate, styrene, alpha-methylsterol, butalbiral, Acrylonitrile. Preferably is styrene or acrylate. Grafting monomer may be allyl(meth)acrylate, diallylmalonate, crotyl(meth)acrylate. Cross-linking monomer may be diethylene glycol dimethacrylate, dimethacrylate of 1,3-butyleneglycol, dimethacrylate of 1,4-butyleneglycol, divinylbenzene, triacrylate of trimethylolpropane (TMRCA).

Multi-layered particles may have different morphology. For example, it is possible to use particles of the following types:

- "soft-hard"having an elastomeric core (inner layer) and a hard shell (outer layer), as described, for example, in European application EP 1061100 A1;

- "hard-soft-t is ardoe", having a hard core, a soft intermediate layer and the hard shell, as described, for example, in applications US 3793402 or US 2004/0030056 A1;

- "soft-hard-soft-hard", in that order elastomeric core, a hard intermediate layer, another elastomeric intermediate layer and the hard shell, as described, for example, in French patent application FR-A-2446296 describing examples of such particles.

The particle size is typically less than 1 μm and is mostly between 50 and 300 nm. Particles obtained by polymerization in emulsion in several stages. During the 1st stage formed the nucleus around which layers should be formed. The final particle size is determined by the number of nuclei that were formed on the 1st stage. During each of the subsequent stages by polymerization of the mixture given a new layer sequentially formed around the nuclei or particles of the preceding stage. At each stage polymerization is carried out in the presence of a radical initiator, surfactant and, optionally, the agent migration. Use, for example, sodium persulfate, potassium or ammonium. After forming particles are removed by coagulation or spray. To prevent agglomeration of the particles can be applied to prevent clumping agent.

The proportion of impact modifier strength in the acrylic copolymer ranges from 0 to 6 parts, mostly from 1 to 69 parts, preferably from 5 to 40 parts, more preferably from 10 to 30 parts per 100 parts of the acrylic copolymer.

Supplements

A protective layer or protective layers may, optionally, include one or more additives chosen from:

of thermal stabilizers;

lubricants;

agents for fire;

UV stabilizers;

antioxidants;

matting agents which can be mineral fillers, for example talc, calcium carbonate, titanium dioxide, zinc oxide or magnesium oxide, or organic fillers such as cross-linked beads based on styrene and/or MMA (examples of such beads are given in EP 1174465);

pigments and/or dyes.

The proportion of additives (additives) varies from 0 to 10 parts, mainly from 0.2 to 10 parts, preferably from 0.5 to 5 parts additives (additives) to 100 parts of the acrylic polymer.

The list of UV stabilizers that can be used can be found in the document "Plastics Additives and Modifiers", chap. 16 Environmental Protective Agents", J. Edenbaum, Ed., Van Nostrand, pages 208-271, which is incorporated into the present application by reference. Preferably the UV stabilizer is a compound of the class HALS, triazines, benzotriazoles or benzophenone. For best resistance to UV radiation can be used in combination with UV-stabilizers. As an example, UV-C is abilization, which can be used, mention can be made of TINUVIN 770, TINUVIN 328, TINUVIN P or TINUVIN 234.

As for thermoplastic polymer, it can be selected from the following polymers:

saturated polyester (PET, RHT, etc.);

ABS;

SAN (styrene-Acrylonitrile copolymer);

ASA (acrylic-styrene-Acrylonitrile copolymer);

polystyrene (crystal or vysokozharoprochnyh);

polypropylene (PP);

polyethylene (PE);

polycarbonate (PC);

PPO;

the polysulfone;

PVC;

chlorinated PVC (PVCC);

foamed PVC.

It may also comprise a mixture of two or more polymers from the above list. For example, it may be a mixture of PPO/PS or PC/ABS.

Way

The invention relates to a method of protecting a thermoplastic polymer, including the imposition in the order specified by joint extrusion, hot pressing or multivitamin molding

the protective layer (I)comprising an acrylic polymer as defined above:

layer of at least one thermoplastic polymer (II).

According to one variant, another protective layer comprising an acrylic copolymer, put on a layer of thermoplastic polymer (the side opposite to the first layer of acrylic polymer), i.e. we can say that the layer of thermoplastic polymer (II) is placed between two layers (Ia) and (Ib), each of motorycles acrylic copolymer, or otherwise, that the layer of thermoplastic polymer (II) is placed in a sandwich between the protective layer (I) and other protective layer. Overlay so they conduct joint extrusion, hot pressing or multivitamin forming in this order:

a protective layer (A)comprising an acrylic polymer as defined above:

layer, at least one thermoplastic polymer (II);

a protective layer (Ib)comprising an acrylic polymer as defined above.

Hot pressing of the layers is one method that can be used. The method of co-casting or multilation molding can also be used. Method multilineage molding includes molding melts, forming each of the layers, in the same form. According to the 1st method multilineage molding the melt poured into the form at the same time. According to the 2nd method in the form put the sliding insert. Using this paste, in the form of pouring the melt, then the sliding insert remove and pour the second melt.

The preferred method is the joint extrusion, which is based on the use of so many extruders, how many layers should be extruded more details, see the working Principles of Polymer Processing, of Z. Tadmor, published in Wiley 1979). Layers of molten polymers are combined at the outlet of the extruder, forming Mogol is you structure. This method is more flexible than the methods mentioned above, and allows you to get even multilayer structures with complicated geometries, such as profiles. It also provides excellent mechanical uniformity. The method of co-extrusion is a well known method for processing thermoplastics (see, for example, "Precises de matieres plastiques, Structures-Proprietes [Review on plastics. Structure-properties], 1989, mise en oeuvre et normalisation [application and standardization], 4th Edition, Nathan, R. 126). The document US 5317737 describes an example of co-extrusion of thermoplastic polymers. You can also refer to the documents US 3476627, US 3557265 or US 3918865.

Multilayer structure

The multilayer structure includes, in this order:

the protective layer (I)comprising an acrylic copolymer as defined above;

layer, at least one thermoplastic polymer (II)

moreover, the layers are arranged one on top of another.

According to one variant, the layered structure includes, in this order:

a protective layer (A)comprising an acrylic copolymer as defined above;

layer, at least one thermoplastic polymer (II);

a protective layer (Ib)comprising an acrylic copolymer as defined above.

The layers are extruded together, obtained by hot pressing or multivitamin molding and preferably are owls the local extruded.

Preferably the protective layer has a thickness between 10 and 1000 μm, preferably between 50 and 200 microns.

The APPLICATION

Multi-layered structure, namely the one that received one of the methods described above may be used for the manufacture of items and products for everyday use, such as:

housing or covers lawn mowers, chain saws, water bikes, household items;

- cover the trunks of cars, parts of the body structure;

- car registration plates;

panel exterior walls of houses-trailers, mobile homes;

- the exterior panels of refrigerators;

panel showers;

the doors of buildings;

- window moldings;

- facing panels;

- doors equipment for domestic use (for example, the kitchen door).

PVC is used mainly as a thermoplastic polymer in the manufacture of products that are designed for exterior applications, such as doors of buildings, drainage systems, moldings, Windows or cladding panels. ASS is used mainly as a thermoplastic polymer in the manufacture of housings or casings, in particular domestic electrical appliances, licence plate, the outer panels of refrigerators or parts of structures housing.

Preferably in the case of PVC multilayer structure is facing panel is. Preferably in the case of ABS multilayer structure is part of the hull structure.

EXAMPLES

The following examples illustrate the invention according to the best option implementation provided by the authors of the invention. They are illustrative only and do not limit the scope of the invention.

A two-layer structure was obtained by way of compression molded and then evaluated using a standardized test for resistance to scratching by Erichsen. In these different structures have changed only the nature of the protective layer (I).

Compounds of various structures

For structure 1 (for comparison) a protective layer was ALTUGLAST MI7T. ALTUGLAST MI7T is an acrylic copolymer containing from 20 to 39% impact strength modifiers "hard-soft-hard", which is defined in the patent US 3793402.

For structure 2 (according to the invention) a protective layer was ALTUGLAS T HT 121. ALTUGLAS T HT 121 is an acrylic copolymer which comprises from 3 to 7% of methacrylic acid and optionally anhydrous functional groups on 97-93% MMA.

For structure 3 (according to the invention) a protective layer was PLEXIGLAST FT15. PLEXIGLAST FT15 is a product supplied by the company Roehm.

Structure 4 (according to the invention) a protective layer consisted of a mixture, a mixture of 1, contains 92.5% ALTUGLAST HT121 and 7.5% modifier at the ary strength "hard-soft-hard", as it is described in patent application US 3793402.

Structure 5 (according to the invention) a protective layer consisted of a mixture, the mixture 2 containing 89,0% ALTUGLAS HT121 and 11.0% of the impact strength modifier of "hard-soft-hard", as it is described in patent application US 3793402.

For the structure of 6 (according to the invention) a protective layer consisted of a mixture, the mixture 3 containing 76.5% of ALTUGLAS HT121 and 23.5% of the impact strength modifier of "hard-soft-hard", as it is described in patent application US 3793402.

Getting the protective layer (I)

- The conditions for obtaining mixtures 1, 2 and 3, containing emission spectra obtained for pure and impact strength modifiers using Buss extruder:

temperature profile: GC1 and GC2: 215°; GC3: 210°C, the head: 220°C.

- The conditions for obtaining extruded film constituting the protective layer (I):

the temperature profile of extruder (°C):

- the temperature of the substance at the entrance and in the center: 220°C;

- the temperature of the substance, leaving the head: 225°C;

the extrusion speed: 5.5 m/min;

the auger speed: 38 rpm;

- cooling temperature: 80°C; and

- thickness: 100 μm.

Conditions for obtaining a two-layer structures (ABS II)/protective layer (I) by pressing in a hot press

Operating parameters:

frame: 3.1 mm;

temperature: 180°C;

preheating: 3 minutes;

exposure: 3 minutes at 100 bar; and

thickness: 3,2 mm

Characteristics of structures

Resistance to caraparu various structures has been evaluated, using standardized test for resistance to scratching by Erichsen. For these various structures were also carried out by fast bend test (see table 1).

For testing the resistance to scratches

The test conditions are obtained by the method Erichsen in accordance with standard NFT 51113:

cutting edge tungsten carbide;

number of turns: 1

rotation speed: 10.5 mm/min;

observations: optical microscope;

method: 10 reflections in polarized light;

used load: 10 N;

measured value: the width of the scratches in microns.

For a quick bend test

Stiffness (Re), expressed in kJ/m2measured on test samples of ABS that were or were not protected acrylic protective layer. Hardness was measured using a fast bend test. The test sample was subjected to bending in the middle with a constant speed. During the test measured the load applied to the subject sample. The bend test was performed at a constant speed on the servo-hydraulic MTS device-831. The force was measured using a piezoelectric element built into the head of the striker, in the interval before 569,4 N. The displacement of the specimen during impact was measured by the LVDT sensor on the cylinder with an interval of 50 mm

During the test were recorded effort (expressed in N) and displacement UD is Mika (in mm). From the experimental curves was calculated area under the curve, which represents the force as a function of displacement until failure of the specimen or to limit bias to the slide (estimated at 20 mm). This area, expressed in joules is the energy consumed by the system during loading. The force curve, denoted as Re, represents the energy at the fault attributed to the Central cross section of the bar, expressed in j/m2.

Table 1
StructureResistance scratch on Erichsen (µm)Re (kJ/m2)
Only ABS (EUR.)160
1 (EUR.): ABS/M17T9933,2±1,6
2 (Fig): ABS/HT 1218314,0±1,7
3 (Fig): ABS/FT 158813,8±1,5
4 (image): ABS/92,5% HT 121+7,5% IM9119,6±0,9
5 (Fig.): ABS/89% HT 121+11% IM27,5±1,6
6 (Fig.): 76.5% of ABS/76,5% HT 121+23,5% IM10035,1±1,3

ABS: MAGNUM 3904 from Dow: the melt flow index of 1.5 g/10 min at 230°C/3.8 kg, 3 mm thick

IM: the impact strength modifier.

Thus it is established that the structure according to the invention have good resistance to scratches. Furthermore, the addition of impact strength modifiers to acrylic polymer makes it possible to improve impact strength, while at the same time, good resistance to scratches.

1. The way to protect products from thermoplastic polymer from scratch, which impose the following order coextruding, or hot pressing, or multivitamin forming:
the protective layer (I)containing acrylic copolymer containing, by mass (the total is 100%):
from 80 to 99.8% of methyl methacrylate (MMA);
from 0 to 20%, of at least one of the co monomer capable of radical copolymerization with MMA;
from 0.2 to 10%:
maleic anhydride
or
acrylic and/or methacrylic acid and optionally anhydrous groups of the formula:

in which R1and R2mean H or methyl radical;
layer of at least one thermoplastic polymer (II), and thermoplastic polymer wybir who is from the group consisting of: unsaturated polyester, ABS (Acrylonitrile-butadiene-styrene), SAN (styrene-Acrylonitrile copolymer), ASA (acrylic-styrene-Acrylonitrile copolymer), crystalline or high impact polystyrene, polypropylene, polyethylene, PPO (polyphenyleneoxides), polysulfone, PVC (polyvinyl chloride), chlorinated PVC or foamed PVC.

2. The method according to claim 1, characterized in that the acrylic copolymer of the protective layer (I) comprises from 0 to 10%, of at least one of the co monomer capable of radical copolymerization with MMA.

3. The method according to any one of claims 1 or 2, characterized in that the acrylic copolymer contains by weight (the total is 100%):
from 80 to 99% of methyl methacrylate (MMA);
from 0 to 10%, of at least one of the co monomer capable of radical copolymerization with MMA;
from 1 to 10%:
maleic anhydride
or
acrylic and/or methacrylic acid and optionally anhydrous groups of the formula:

in which R1and R2mean H or methyl radical.

4. The method according to claim 1, characterized in that the co monomer capable of radical copolymerization with MMA, is a (meth)acrylic monomer or vinylaromatic monomer.

5. The method according to claim 1, characterized in that vinylaromatic monomer is styrene and/or alpha-methylsterol.

6. The method according to claim 1, otlichayushiesya, what acrylic copolymer comprises by weight (the total is 100%):
from 90 to 99% of methyl methacrylate (MMA) and
from 1 to 10%:
maleic anhydride
or
acrylic and/or methacrylic acid and optionally anhydrous groups of the formula:

in which R2and R2mean H or methyl radical.

7. The method according to claim 1, characterized in that the impact strength of acrylic copolymer improve by at least one of the impact strength modifier.

8. The method according to claim 7, characterized in that the proportion of impact modifier strength in the acrylic copolymer ranges from 0 to 60 parts, predominantly from 1 to 60 parts, preferably from 5 to 40 parts, more preferably from 10 to 30 parts per 100 parts of the acrylic copolymer.

9. The method according to claim 1, characterized in that the protective layer (I) contains one or more additives selected from: thermal stabilizers, lubricants, agents for fire resistance, UV stabilizers, antioxidants, antistatic additives, matting agents, pigments and dyes.

10. The method according to claim 1, wherein another protective layer comprising an acrylic copolymer obtained according to any one of the preceding paragraphs is superimposed on the layer of thermoplastic polymer (II), and the layer of thermoplastic polymer (II) is located between the protective layer (I) and the l is provided with a protective layer.

11. A multilayer structure comprising in the following order:
the protective layer (I)obtained by the method according to any one of claims 1 to 9;
layer, at least one thermoplastic material (II),
moreover, the layers are arranged one on top of another.

12. The multilayer structure according to claim 11, characterized in that an additional protective layer containing acrylic copolymer obtained according to any one of claims 1 to 9, superimposed on the layer of thermoplastic polymer (II).

13. The multilayer structure according to any one of § § 11 and 12 for the manufacture of items and products for everyday use, such as:
the housing or housings lawn mowers, chain saws, water bikes, household items;
cover the trunks of cars, parts of the body structure;
the number plates of vehicles;
panel exterior walls of houses-trailers and mobile homes;
the exterior panels of refrigerators;
panel showers;
the doors of the buildings;
window moldings;
cladding panels;
doors equipment for domestic use (for example the kitchen door).



 

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1 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: there is disclosed application of inorganic IR-reflecting pigments for dark-coloured moulding compounds containing mixed polymethyl(meth)acrylate and adjugated matrix to 45 wt % containing (wt %): styrene (70-92), acrylonitrile (8-30), additional comonomers (0-22) and inorganic pigments. A moulded piece made of these moulding compounds is characterised with heating rate 50°C/20 min and less. In addition, there is disclosed application of the declared moulded piece over the other moulded piece with using conventional methods.

EFFECT: development of well processed, stable opaque-coloured IR-reflecting moulding compounds.

7 cl, 3 dwg, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: present invention pertains to compositions, with low coefficient of friction for use in friction units of living organisms. Proposal is given of an antifriction composition, containing, as polymer binding mixture (with ratio of components in the binder): methyl methacrylate monomer (27-36 mass units), polymethyl methacrylate polymer powder (72-64 mass units), initiator - benzoyl peroxide 1 mass units (polymer binder A); or a mixture (with ratio of components in the binder): methyl methacrylate (27-36 mass units), copolymer powder (72-64 mass units) with the following content of components: methyl methacrylate - 89 mass units, ethyl methacrylate - 8 mass units, methyl methacrylate - 2 mass units, as well as initiator-benzoyl peroxide - 0.6-1.5 mass units (polymer, binder B) and ultrahigh-molecular polyethylene with 1·106 - 12·106 dalton molecular weight, in powder form (2-15 mass units per 85-98 mass units of polymer binder). Compared to the prototype, the value of coefficient of friction decreases by 2-4 times.

EFFECT: design of a composition, which reduces friction in the maxillotemporal joint of a polymer implant.

3 cl, 4 tbl

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.

17 cl, 8 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: chemistry.

SUBSTANCE: invention relates to an adhesive film for road surface. The adhesive film contains a carrier substrate which is a polymer film, a surface layer on the substrate surface made from a polymer film and a layer of pressure-sensitive hot-melt adhesive. The polymer film is based on polyvinyl chloride, polyamide, acrylic resins, high-density polyethylene, polypropylene and polyethylene vinyl acetate. The surface layer contains resinous non-asphalt material or material which contains about 50% or more resinous non-asphalt component and about 50% or less asphalt component. The surface layer can form a bond with the adjoining layer of asphalt road material when the surface layer is heated to about 120°C or higher at pressure which is applied to the material of the adhesive film on the side of superimposed layer of asphalt road material. The layer of asphalt road material has thickness of about 3.8 cm or more. The surface layer is not adhesive at temperature of about 20°C and pressure of about 1 atm. The adhesive film for road surface can be used particularly for repairing old road surfaces without tack coat.

EFFECT: improved technical properties of the adhesive film for road surface.

2 tbl, 3 ex, 15 dwg

Laminated sheet // 2443564

FIELD: process engineering.

SUBSTANCE: invention relates to laminated sheet. Laminated sheet comprises glass fibers of woven and nonwoven materials fixed by binder and fluorine-containing film laid one onto another. Said binder comprises copolymer A with recurrent links a1 and a2. Recurrent links a1 represent, at least, one fluorine-containing monomer selected from group consisting of tetrafluoroethylene, chlorotrifluoroethylene and hexafluoropropylene. Recurrent links a2 represent, at least, one monomer not containing fluorine and selected from the group consisting of vinyl ether, vinyl ester, isopropenyl ether, isopropenyl ester, allyl ether and allyl ester.

EFFECT: higher translucence, longer life.

12 cl, 3 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: granules contain plasticised polyvinyl butyral and an antiblocking agent - a fatty acid amide.

EFFECT: invention simplifies treatment of polyvinyl butyral granules, reduces labour input in cooling and does not deteriorate optical properties of the material.

15 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of obtaining elastomeric materials and particularly to processing surfaces of elastomer films in order to prevent creating in a roll. The method involves forming a film layer from an elastomeric polymer from a block-copolymer of vinyl arylene and conjugated diene monomers, which can be stretched by at least 150% of the initial size and then shrink to not more than 120% of the initial size. An anti-crease coating layer is applied on the first surface of the film. The coating consists of a solvent and an anti-crease coating component selected from lacquer and a surfactant. The film is rolled into a roll, the anti-crease coating component being in contact with the second surface of the film.

EFFECT: efficient method of processing surfaces of elastomer films to prevent creasing in a roll.

18 cl, 5 dwg, 2 ex

Laminate // 2428315

FIELD: process engineering.

SUBSTANCE: invention relates to laminate used in glass panels, lenses etc. Proposed laminate comprises base made up of polycarbonate resin, first layer resulted from hardening acrylic resin hardening, second layer produced by thermal hardening of organosiloxane resin. Acrylic resin composition comprises (A) acrylic copolymer containing at least 70 mol % of repeating link of formula (A)

,

where X is hydrogen or methyl, Y is methyl, ethyl, cycloalkyl or hydroxyalkyl with the number of atoms of 2 to 5, or residue of UV radiation absorber based on triazine; blocked polyisocyanate compound; hardening catalyst; and (D) UV radiation absorber based on triazine. Note here that total content of UV radiation absorber based on triazine in formula (A) and as component (D) varies from 1 to 40 wt %. Composition of organosiloxane resin in proposed laminate comprises (E) colloidal silicon dioxide and (F) hydrolytic condensate of alkoxy silane. Invention covers also window glass made based on said laminate.

EFFECT: higher strength and longer life.

25 cl, 15 tbl, 50 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of polymer film labels. Label consists of polymer film (A) containing styrene components with top and bottom surface and features water vapor penetration rate varying from about 15 to 150 g/m2/day, and water-based adhesive component in contact with film bottom surface. Said labels are applied on glass, metal or plastic substrate by side containing water-based adhesive component, and, thereafter, dried.

EFFECT: higher efficiency of production.

25 cl, 2 tbl, 15 ex

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer polycarbonate article, e.g. plate, film or 3D extruded part used for glasing. Proposed article comprises first layer A protecting against UV light and made from polyalkyl methacrylate with thickness of 1 to 2 mcm, containing 0.01 to 20 wt % of biphenyl-substituted triazine of formula (I) as UV stabiliser , where X stands for OR1 or OCH(R2)COOR3. Note here that R1 is alkyl with the number of hydrogen atoms varying from 4 to 12, R2 is alkyl with the number of carbon atoms varying from1 to 6, and R3 stands for alkyl residue with the number of carbon atoms varying from 1 to 12. Note also that second layer B comprises polycarbonate.

EFFECT: higher light stability as compared with similar products containing other UV stabilisers.

12 cl, 1 tbl, 8 ex

FIELD: process engineering.

SUBSTANCE: invention relates to interlayer for wind glass and method of its production. Interlayer comprises polymer sheet made from plastified poly(vinyl butyral) containing 40-90 pph of plastifier that features vitrification temperature lower than 25°C. Note here that said intermediate layer features wedge-like shape and has first and second edges. First edge thickness makes, at least, 0.38 mm while that of second edge exceeds the formed by, at least, 0.13 mm. Said sheet ups noise isolation by, at least, 2 dB as compared with equivalent polymer sheet with vitrification temperature of 30 to 33°C.

EFFECT: improved isolation properties of instrumentation panels.

32 cl, 4 tbl, 1 dwg

FIELD: process engineering.

SUBSTANCE: proposed multilayer oriented thermosetting film comprises one surface layer that contains polystyrene material that comprises one inner layer that comprises polyolefin layer. Films are preferably oriented in either lengthwise or crosswise directions. Said films are ideally suitable for use as thermosetting labels that may be applied in the form of collar setting in crosswise direction, or applied in using reel method.

EFFECT: total density smaller than 1,0 g/cm3 that facilities processing for reuse.

23 cl, 4 dwg, 6 tbl, 5 ex

FIELD: process engineering.

SUBSTANCE: invention relates to polymer interlayer of multilayer glass panel and to such panel made from multilayer glass. Proposed interlayer comprises three polymer sheets made from plastified poly(vinyl butyral). Amount of plastifier in plastified poly(vinyl butyral) of second polymer sheet exceed by, at least, 10 parts per 100 parts of polymer, the amount of plastifier in plastified poly(vinyl butyral) of first polymer sheet. Residual amount of hydroxyl groups in second polymer sheet is smaller by, least, 20 wt % than that in first polymer sheet. First and second polymer sheets are arranged back-to-back. Residual content of acetates in both first and second polymer sheets make less than 5 mole per cent. Third and second polymer sheets are arranged back-to-back. Amount of plastifier in plastified poly(vinyl butyral) of second polymer sheet exceed by, at least, 10 parts per 100 parts of polymer, the amount of plastifier in plastified poly(vinyl butyral) of third polymer sheet.

EFFECT: improved noise isolation properties of proposed panels.

36 cl, 3 tbl

FIELD: chemistry.

SUBSTANCE: method of producing membranes involves the following steps: mixing molten polyethylene and a membrane-forming solvent, extrusion of the obtained melt and cooling the extrudate with formation of a gel form, biaxial stretching at crystallisation temperature ranging from crystallisation temperature of the polyethylene dispersion to melting point of polyethylene +10°C, removing the solvent, repeated stretching of the membrane in the transverse direction at temperature 100-120°C.

EFFECT: obtaining microporous polyolefin membranes having excellent compression strength.

4 cl, 1 tbl, 7 ex

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