Polymer composition

 

(57) Abstract:

Usage: composition with high mechanical and rheological properties suitable for repeated processing. The inventive composition containing polystyrene reinforced diene rubber and linear blockcopolymers diene with styrene, polyethylene and block copolymers of a diene with styrene, as it contains polystyrene polystyrene reinforced 5 - 12 % polybutadiene rubber and 0.5 to 5 % linear blockcopolymer mol. m 75,000 containing 25 to 75 % of polystyrene, and as blockcopolymer diene with styrene linear block copolymers of 20 to 80 % polybutadiene (mol. m 5,000 - 150,000 and 80 to 20 % polystyrene (mol. m 5,000 - 150,000 in the following ratio, wt. %: toughened polystyrene 10 - 90; polyethylene 5 - 50; linear block copolymers 5 - 40. table 4.

The invention relates to blends based vinylaromatic polymers having high mechanical characteristics, and preserving properties after processing at temperatures exceeding 200oC.

Composition based on vinylaromatic polymers possess high mechanical and rheological properties and suitable for the production of shaped products with the practical polymers are thermoplastics, recyclable when heated by injection molding or extrusion. These polymers have a pretty good tensile strength, but they are not suitable in the case of requirements for tensile strength combined with good chemical resistance.

Closest to the proposed technical substance is a polymeric composition containing a polyolefin, vinylaromatic polymer and as a compatibility agent between the polyolefin and vinylaromatic polymer, conjugated with vinylaromatic polymer, conjugated with vinylaromatic diene monomer star-shaped block copolymers.

The above mixture is suitable for processing into shaped articles by injection molding, extrusion and/or by forming a sheet of thermoplastics, however, they have some drawbacks that limit their use in such processes.

The main disadvantage of them is that technological waste cannot be reused due to the sharp deterioration of the mechanical properties of the mixture, in particular because of the ability to elastic deformation and relative elongation at break.

The purpose of izobreteny the results achieved thermoplastic polymer composition, contains:

10 to 90 wt. vinylaromatic polymer (A), hardened linear blockcopolymer vinylaromatic monomer and diene and 5 12 polybutadiene rubber;

5 to 50 wt. polyethylene (b) and

5 40 wt. linear blockcopolymer (C) vinylaromatic monomer containing a diene in the range of 20 to 80 wt.

the sum of all three components (A), (b) and (C) is equal to 100.

Preferably the polymer composition according to the present invention contains:

60 to 80 wt. vinylaromatic polymer (A);

10 to 30 wt. polyethylene (b) and

from 5 to 30 wt. linear blockcopolymer (C), the sum of components (A), (b) and (C) is equal to 100.

Vinylaromatic polymer (A) can be obtained by polymerization of a monomer having the General formula

,

in which R denotes a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms, p is 0 or an integer from 1 to 5, and Y denotes a halogen atom or an alkyl radical containing 1 to 4 carbon atoms, in the presence of polybutadiene rubber and linear blockcopolymer using a radical initiator.

Examples vinylaromatic compounds having the above General formula are: styrene, methylsterol, mo is sootvetstvuyushie alphamethylstyrene, such as ortho - and para-methylstyrene, ortho - and parameterstyle, ortho - and para-methyl-alphamethylstyrene.

The monomers can be used in mixtures with each other or with other copolymerizable the comonomers such as maleic anhydride, Acrylonitrile, Methacrylonitrile, complex alkalemia esters with C1-4acrylic or methacrylic acid.

Used Dianova rubber is preferably present in an amount of 7 to 12 wt. and may be a polybutadiene, polybutadiene with a high or medium CIS - and low viscosity.

Linear block copolymers vinylaromatic monomer and the conjugated diene is preferably contained in the range of 2 to 5 wt. and has a molecular mass equal to 75,000.

These linear block copolymers containing 20 to 75 wt. polystyrene and 80 respectively 25 wt. the conjugated diene.

These copolymers can contain arbitrary or cone-shaped polymer segment (B/S) or arbitrary and/or tapered copolymers.

Linear blakolmer of this type available on the market, for example, in the form of "SOLPRENER1205", "SOLPRENER308", and "SOLPRENE 314", manufactured and sold by Phillips petroleum.

Photopolymerization in mass.

The preferred method of preparation consists in carrying out prepolymerisation aromatic monomer in the presence of a radical initiator, a diene rubber and the above blockcopolymer in the first reactor to achieve the conversion of the monomers under 50

The polymerization is completed in one or more subsequent reactors until complete conversion of the monomers. The polymer is then obzharivayut and granularit.

The polyolefin (B) preferably is a polyethylene containing linear low density polyethylene (LLDPE) medium density and high density.

Linear block copolymers (C), used as an agent compatibility in the composition according to the present invention also relates to a known type available on the market. This block copolymers is of type:

(II) S B;

(III) SIB S2;

(IV) BISIB2S2,

where S, S1and S2denotes blocks elastomeres vinylaromatic polymer having a mol. m 5,000 150,000.

B, B1and B2denote blocks of elastomeric polymer based on a conjugated diene, having a mol. m 5,000 150,000.

Linear block copolymers (C) and the FL", or trade name, which is proizvodi and implements the firm "FINA".

Linear blakolmer (C), particularly preferred in the compositions according to the invention has the formula (IV) BISIMB2- S2and a molecular weight of from 30,000 to 150,000 and content polybutadiene 40 to 80 wt. In this example, the average molecular weight of the block INIranges from 0.1 to 0.5 times the weight of block B2and the average molecular weight of the block S1varies from 0.25 to 2.0 times the weight of the block S2. In addition, this preferred polymer includes a copolymer segment formed from a statistically linked diene and links vinylaromatic monomer, between blocks BIand

This linear block copolymers manufactured and sold by the firm ENICHEM ELASTOMERI" under the trade name "EUPOPRENERSOLT 168".

The composition according to the present invention can be prepared by mixing the components at a low temperature in any mixer known type. The mixture is then ekstragiruyut in single-spindle and single-spindle extruders at a temperature of preferably 150 250oC.

These compounds may contain a small amount (typically from 0.1 to 3 wt.) is substances, substances that prevent the combustion of the additive to improve the fluidity, antistatic agents, dyes, pigments, blowing agents for the manufacture of low density and semi-finished products, etc. can be added when mixing the components in amounts of 0.1 to 10 wt.

The mixture according to the present invention is easily handled and exhibit properties that are in General much better than the properties of individual components. For this reason, the mixtures according to the invention are used for manufacturing products with high mechanical and rheological properties combined with high chemical resistance.

Therefore, the mixtures according to the invention can be used for the manufacture of electrical appliances, electronics, films, sheets, tapes, strips, rods, boxes, cups, containers, etc.

These compounds can be used to obtain a foam.

An additional advantage of the mixtures according to the present invention is that they retain almost unchanged all mechanical properties even after repeated technological operations at temperatures equal to or exceeding 200oC. Process waste can utilize drum at room temperature to prepare a mixture, consisting of:

75 wt. including high impact polymer (A) containing 7,75 wt. polybutadiene rubber and 3 linear blockcopolymer "SOLPRENER1205", produced and sold by the company, Phillips petroleum, containing 25 styrene and 75 butadiene and having a mol. m 75,000;

15 wt. including linear polyethylene of low density (LLDPE) (B), having a density of 0,926 g/cm3and a melt flow index (M, G, I.) 0.7 g/10 min;

10 wt. including radial blakolmer (C), containing 70 wt. butadiene and 30 wt. styrene containing silicon as a linking moiety, with each polymer block has a molecular weight of 40,000.

The mixture ekstragiruyut of the single-screw extruder BANOERA TR 45 having a diameter of 45 mm

thermal profile of the extruder between the hopper and the extrusion head is 150, 180, 190 and 215oC.

Grain after the first extruding re ekstragiruyut in the same extruder at 240oWith over 55 C.

The capacity for elastic deformation, elongation and rheological properties of the samples was determined after two, four and six extrusion processes carried out in the same extruder and under the same conditions, the ability to elastic deformation 1/01 c notch, determine if 23oWith according to ASTM d 256 samples for testing, having a thickness of 12.7 mm, obtained injection-molded at 190oS, elongation at break are determined according to 638.

The measured properties are shown in table 1.

Example 2. Analogously to example 1 to obtain a mixture, consisting of:

75 wt. including high impact polymer (A) in example 1;

15 wt. including linear polyethylene of low density (LLDPE) (C) of example 1;

10 wt. including linear blakolmer (C) having the structure (IV), containing 57 wt. butadiene and 43 wt. styrene, sold by the firm ENICHEM ELASTOMERI" under the trade name "EUROPRENE8SOLT 168".

Rheological properties, the ability to elastic deformation Izod and properties relative elongation are given in table. 1.

In table. 2 shows the data of examples 3 and 4, the composition obtained in the conditions of example 1.

Using the conditions of the method according to example 1, the resulting polymer composition are shown in table. 3.

In table. 4 shows the data of examples 8 to 10.

Polymer composition comprising polystyrene, reinforced diene rubber and a linear block copolymer of a diene with styrene, polyethylene and a block copolymer Dandenong rubber and 0.5 to 5% linear block copolymer (mol.m. 75,000 containing 25 to 75% of polystyrene, and as the block copolymer of the diene with styrene linear block copolymer of 20-80% polybutadiene (mol.m. 5,000-150,000 and 80-20% polystyrene (mol.m. 5,000-150,000 in the following ratio, wt.

Toughened polystyrene 10-90

Polyethylene 5-50

Linear block copolymer 5-40

 

Same patents:
The invention relates to an elastic magnetic compositions based on block copolymers of diene and vinylaromatic hydrocarbons and can be used for the manufacture of flexible permanent magnets, which are used as magnetic inserts, valves and seals for various kinds of cameras (including refrigerators)

The invention relates to the field of footwear compositions and can be used for bottom shoes and cast shoes

The invention relates to thermoplastic compositions based on polyolefin and vinylaromatic polymer with an excellent combination of properties, including thermoformable, ductility, thermal stability, modulus of elasticity, the ability to elastic deformation, resistance to organic substances of natural origin, which tend to accelerate the decomposition of some polymers

Polymer composition // 2058986
The invention relates to polymeric compositions based (co) polymers of styrene, in particular to compositions that can be processed by blow-extrusion method in large-sized articles, such as bottles, containers, cans, toys, pushers for electric meat mincers, etc

Polymer composition // 2058343
The invention relates to the production of plastics used in conditions of low temperatures and used for the manufacture of various industrial products in mechanical engineering, electrical engineering, production of pipes and necessities

Lubricating oil // 2045570
The invention relates to polymer chemistry, in particular to polymeric blends that increase when added to the oil's viscosity, in particular at high temperatures

The invention relates to polymer industry, in particular molding composition for shoes, and can be used for injection molding of soles-based thermoplastic elastomers

The invention relates to the production technology of construction materials used in the manufacture of bitumen-polymer waterproofing mastics
The invention relates to light industry, in particular to thermoplastic compositions intended for the manufacture of parts bottom shoes

The invention relates to the field of modification of hydrocarbon binders such as bitumen, asphalts, tars

The invention relates to a method for producing a hydrophilic polymer films, in particular, to a method and apparatus for modification of polymer films by coating photopolimerization solution containing a hydrophilic monomer with a low ability to swell in water, and a UV stabilizer to the surface of the film, pre-processed high frequency, and their subsequent photopolymerization to improve hydrophilic properties, climate resilience and inhibiting properties

FIELD: polymer materials.

SUBSTANCE: composition comprises polyolefin A, containing anhydride function and having viscosity at least 20 g/10 min measured at 190°C and loading 2,16 kg, and epoxy function-containing product B destined for cross-linking polyolefin A. Relative proportions of A and B are such that for each epoxy function there are from 0.1 to 1.5 anhydride functions. Composition can be used in slush molding process, in thermal molding of sheets, or in on-rod casting process.

EFFECT: increased flowability resistance and wear resistance.

6 cl, 1 tbl, 6 ex

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

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

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

5 cl, 19 ex, 3 tbl

FIELD: polymer production.

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

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

2 cl, 2 tbl, 5 ex

FIELD: organic chemistry, polymers.

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

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

20 cl, 4 tbl, 4 ex

FIELD: technological processes.

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

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

15 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to binder for co-extrusion based on a mixture of co-grafted polyolefins, as well as a multilayer structure containing the binder. The binder contains a mixture of at least homo- or copolymer of ethylene (A1), having density 0.940-0.980 g/cm3, and at least one copolymer of propylene (B) containing at least 51 wt % propylene. (Co)polymers of the said mixture are co-grafted with a functional monomer selected from carboxylic acids and their derivatives. The degree of graft polymerisation of the extrusion binder is more than 0.05 wt % and less than 0.5 wt % of the total weight of the said binder. The mixture is possibly diluted in at least a homo- or copolymer of ungrafted ethylene (A2). Said binder has density of 0.940-0.980 g/cm3.

EFFECT: disclosed binder has sufficient fluidity, high resistance to peeling of layers at temperature higher than 80°C, and is meant for use in a multilayer structure for protecting metal surfaces and for making packaging, rigid hollow housings, particularly bubbles or bottles, or flexible reservoirs, as well as multilayer films.

13 cl, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: composition contains the following, %: (A) 9.9-99.8 polycarbonate resin based on bisphenol A; (B) 0.1-90 polyethylene terephthalate, and (C) 0.1-30 grafted rubber, as well as 0.1 pts.wt heat stabiliser, 1 pts.wt dye and 0.7 pts.wt UV absorber. The grafted rubber consists of 30-80% substrate and 70-20% solid graft phase. The graft phase is obtained through copolymerisation of a monomer from a first group consisting of styrene, α-methylstyrene, styrene which is halogenated in the ring and styrene which is alkylated in the ring, and a monomer from a second group containing (meth)acrylonitrile and maleic anhydride, with the weight ratio of said monomers ranging from 90:10 to approximately 50:50. The substrate contains the following, %: (C1) 1-50 core of cross-linked polymerised vinyl monomer and (C2) 50-99 shell of cross-linked polymerised acrylate with glass transition point lower than 0°C.

EFFECT: invention enables to obtain articles characterised by intense lustre, high impact strength and absence of tiger stripes.

8 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: described is a composition for obtaining a binding agent for soaking cellulose fibres. The composition contains polyolefin resin which reacts with 1.6-4.0% maleic anhydride. The composition has less than 1500 ppm free maleic anhydride. The resin has melt flow index at 190°C and 2.16 kg ranging from approximately 0.1 to 500 g/10 min. The composition has yellowing index of 20-70. The polyolefin is polyethylene. Described also is a cellulose composite containing 10-90% cellulose fibre; a first polyolefin resin having melt flow index from 0.1 to 100 g/10 min; 0.1-10 wt % composition for obtaining the binding agent. The maleic anhydride is grafted on the polyethylene.

EFFECT: high binding efficiency of the binder.

12 cl, 8 tbl, 20 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to an improved method of producing polyolefins grafted with acrylic acid, as well as to methods of increasing adhesion of polypropylene polymers to polar materials and to thermoplastic vulcanised elastomers. The improved method of producing polypropylenes involves feeding acrylic acid and peroxide into an extruder further from the point where polypropylene is fed. Acrylic acid is fed at a rate of more than 25 pounds an hour, peroxide is fed at a rate of more than 2 pounds an hour and total weight is more than 500 pounds an hour. The obtained propylene, which is grafted with acrylic acid, has melt flow rate ranging from approximately 100 to approximately 500 dg per min. Methods of increasing adhesion of polypropylene polymers to polar materials and to thermoplastic vulcanised elastomers involves use of said propylene, which is grafted with acrylic acid, as an adhesion promoter.

EFFECT: obtaining improved material for adhesion of propylene-based polyolefins with polar materials and thermoplastic vulcanised elastomers.

16 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a curable sealing resin composition. The curable composition contains at least one anhydride-functionalised polymer in amount of 30-60 wt %, a polyol in amount of 10-25 wt %, an epoxide-functionalised polymer, oligomer or monomer in amount of 15-40 wt %, a urethane polyol-functionalised compound selected from a group consisting of urethane diol, polyurethane diol and combination thereof in amount of 5-15 wt % and a catalyst with respect to total weight of the resin. The resin composition can be cured at room temperature. Components used to prepare and cure the resin composition can be provided in form of two or more parts.

EFFECT: hydrolytic stability, high hardness, flexibility and low cost of production of the sealing resin which can be used to restore insulation and/or for environmental protection of cable joints, sealed articles etc.

13 cl, 4 tbl, 3 ex

Up!