Polymer dyed composition

FIELD: chemistry.

SUBSTANCE: disclosed is a polymer dyed composition which contains high- or low-pressure polyethylene and a pigment - sarcinaxanthine yellow pigment preparation, obtained from Micrococcus luteus biomass in form of a product of its alkaline hydrolysis or extract of the product of alkaline hydrolysis of said biomass with a polar organic solvent, in amount of 5.0-20.0 wt %.

EFFECT: dyeing uniformity with low content of pigment in polyethylene concentrates, preservation of physical and mechanical properties of polyethylene, wider raw material base for producing microbial dyes and the range of dyed compositions.

5 cl, 2 tbl, 11 ex

 

The invention relates to pigmented polymer compositions based on polyethylene concentrates of pigments (PCP), polyethylene of high and low pressure. In recent years, in the manufacturing process of various types and modifications of the colored polymer products increased technical requirements and, as a consequence, the need for the introduction of new advanced materials.

Organic yellow dyes used for various polymer products on the world market are sold at high prices due to relatively expensive raw material.

In the process of producing colored polymer compositions yellow, designed for insulation of wires and cables in the recipe PCP, apply yellow 301, 307, 302, isoindoline 109, 110, irgasan, benzidine yellow for polystyrene and other pigment yellow colored composition of 0.6 wt.%. The quality of the composition is determined in accordance with the scientific and technical documentation.

The present invention relates to the production of new dyes. The aim of the invention is the expansion of the range of the painted compositions and raw materials for their production due to the use of microbial pigment preparation in technology of dyeing of polyolefins.

This object is achieved in that the colored polymer composition comprises a polyol is in the dye - microbial yellow pigment preparation carcinosin.

Depending on the nature of the yellow pigments produced by chemical and microbial synthesis, such as carotenoids. Identification of carotenoid pigments is based on the absorption spectra of carotenoids. Modern analytical method for quantitative determination of carotenoids described [Kaiser Ph., Surmann P., Valentin G., Fuhrmann H. A small-scale method for quantitation of carotenoids in bacteria and yeasts. J.Microbiol. Methods, 2007, v.70, p.142-149]. There is a method for isolation of carotenoids from the culture of Sarcina lutea trichloroacetic acid followed by extraction with methanol [M.M. Mathews, W.R. Sistrom Intracellular location of carotenoid pigments and some respiratory enzymes in Sarcina lutea. J.Bacteriol. 1959, v.78, N 6, p.778-787]. Due to thermal sensitivity of the selected pigment, this method is unsuitable for technology of dyeing of polymers.

Microbial pigments are very diverse in structure connection. Their biosynthesis and the maximum accumulation is carried out during the stationary phase of growth. In the process of biosynthesis of microbial pigments as the final target product does not metabolize, which enables to obtain a required volume of biomass feedstock to retrieve them. Extraction of biological pigment biomass represents a specific biotechnological developments in the production process of the final product.

The immediate technical is eskay entities the prototype is a colored polymer composition concentrate described in the patent of Russian Federation № 219136 "Polymer ink composition is a concentrate-based red pigment - prodigiosin.

The present invention includes the following developed stage dyeing of polymers: the accumulation of microbial biomass allocation of biomass yellow pigment preparation carcinosarcoma, manufacture of polymer compositions, painted yellow pigment preparation.

The invention uses the producer of yellow pigment carcinosarcoma Micrococcus luteus (Sarcina lutea), cell culture spherical, Gram-positive, resulting in the characteristic division in three planes form packages (V.B.D. Skerman, McGowan V. And P.H.A. Sneath (ed.): Approved lists of Bacterial Names. Int.J.Syst.Bacteriol., 1980, 30, 225-420). The pigment preparation is isolated from a culture of Micrococcus luteus, ethanol has three maximum absorption 416, 439, 469 nm, characteristic for bacterial50carotenoid carcinosarcoma yellow pigment (Handbook of biochemistry. Kiev, Naukova Dumka, 1976, s; Britton, Biochemistry of natural pigments. - M.: Mir, 1986, p.57).

In this invention the method of the extraction of the biomass of the culture of Micrococcus luteus yellow pigment preparation carcinosarcoma, which is as follows: a suspension culture grown on agar medium (mastopathy AG the R - MPA), used as inoculum. The amount of inoculum for seeding is 0.2-0.5% of the volume of the nutrient medium. The optimum culture growth at 28 to 34°C. the Maximum concentration of the pigment is achieved during stationary phase of growth at 60-72 h of incubation. The cells are then separated from the culture fluid and biomass as the raw material for selection of the pigment. The biomass is treated with an ionic detergent, such as dodecyl sulfate (DDS) at the rate of 0.5 to 2.0% by wet weight. At the next stage, carry out the alkaline hydrolysis of biomass: make NaOH (KOH) based 4,0-20,0 g/kg of biomass. Microbial biomass is thoroughly stirred for 2-4 hours at a temperature of 18-23°C. extraction of the yellow pigment from processed biomass exercise polar organic solvent, for example ethanol.

In the process of dyeing polymers yellow pigment preparation carcinosin used in the form of one of the two alternative important forms: the product of the alkaline hydrolysate of the specified biomass or product extract alkaline hydrolysate of the specified biomass polar organic solvent, for example ethanol.

The concentration carcinosarcoma expected at 450 nm, averaged specific absorption rate for carotenoids 2500 (A1701 cm, 450) (M.M. Mathews, W.R. Sistrom Intracellular location of carotenoid pigments and some respiratory enzymes in Sarcina lutea. J. Bacteriol. 1959, v.78, 6, p.778-787).

Painted yellow pigment drug carcinosarcoma polymers are made on the basis of the basic grades of polyethylene GOST 16337-77, quality dyed polyethylene was determined by properties in accordance with specifications on plastic concentrates of pigments (TU 6-05-1565-83 Polyethylene concentrates of pigments (PCP)" reg. No VIPS 2383592, THE 2243-171-00203335-2007, THE 2243-175-00203335-2007).

The invention is illustrated by the following examples of specific performance for polyethylene of high and low pressure.

Example 1 (the prototype)

In the mixer, providing intensive mixing ("mixer"), injected polyethylene brand 10803-020 to 90.0 wt.% and dye - pigment preparation prodigiosin in the amount of 10.0 wt.%, obtained by processing biomass of 0.2% VAT followed by extraction of the pigment ethanol, and served on the stage coloring polyethylene. In the coloring process is uniform mixing of the dye with polyethylene. The granulation product is carried out on the molten polymer mass.

Example 2

In the mixer injected polyethylene marks 153-C to 90.0 wt.% and dye-pigment preparation carcinosin extracted from the alkaline hydrolysate of biomass ethanol 10.0 wt.%, served on the stage color of the specified polymer. The painting process of the polyethylene of example 1.

Example 3

The MCA is Italy injected polyethylene brand 10803-020 95,0 wt.% and dye - the pigment preparation carcinosin 5.0 wt.% in biomass after alkaline hydrolysis. The painting process of the polyethylene of example 1.

Example 4

In the mixer injected polyethylene marks 153-C 80,0 wt.%, dye - pigment preparation carcinosin extracted from the alkaline hydrolysate of biomass ethanol and 19.8 wt.%, and stabilizer - chimassorb 81 in the amount of 0.2 wt.%. The painting process of the polyethylene of example 1.

Example 5

In the mixer injected polyethylene marks 153-C to 90.0 wt.% and dye - pigment preparation carcinosin, the product of the alkaline hydrolysis of biomass 1 0.0 wt.%. The painting process of the polyethylene of example 1.

Example 6

In the mixer injected polyethylene marks 153-C to 90.0 wt.% and dye - pigment preparation carcinosin extracted from the alkaline hydrolysate of biomass ethanol 10.0 wt.%. The painting process of the polyethylene of example 1.

Example 7

In the mixer injected polyethylene marks 153-K 95,0 wt.% and dye - pigment preparation carcinosin, the product of the alkaline hydrolysis of biomass 5.0 wt.%. The painting process of the polyethylene of example 1.

Results comparison of colored polyethylene according to examples 1-7 are shown in table 1.

Example 8

In the mixer injected polyethylene mark 80B-277 89,7 wt.%, the pigment preparation carcinosin 10.0 wt.% (pigment 0,045), the stabilizer Irganox-225 0.3 wt.%. The process is paint polyethylene of example 1.

Example 9

In the mixer injected polyethylene mark 80B-277 89,7 wt.%, the pigment preparation carcinosin 10.0 wt.% (pigment 0,06), the stabilizer Irganox-225 0.3 wt.%. The painting process of the polyethylene of example 1.

Example 10

In the mixer injected polyethylene brand NT of 89.7 wt.%, the pigment preparation carcinosin 10.0 wt.% (pigment 0,06), the stabilizer Irganox-225 0.3 wt.%. The painting process of the polyethylene of example 1.

Example 11

In the mixer injected polyethylene brand NT 89,64 wt.%, the pigment preparation carcinosin 10.0 wt.% (pigment 0,06), the stabilizer Irganox-225 0.3 wt.% and Dynamar 0.06 wt.%. The painting process of the polyethylene of example 1.

The results of the comparison of figures painted low pressure polyethylene of examples 8-11 are shown in table 2. The amount of pigment indicated in examples 8-11, and mass fraction of the pigment preparation of the alkaline extract of hydrolyzed biomass ethanol is 10 wt.%

In table 1 the results of the comparison criteria of the colored polymer base polyethylene grades correspond to the technical conditions for polyethylene concentrates song and a slightly different figures from the prototype. Polyethylene, painted as yellow pigment drug carcinosarcoma extracted from biomass ethanol after alkaline hydrolysate and pigment prep is ratom in biomass retains heat resistance and lightfastness according to the technical conditions for polyethylene concentrates THE 6-05-1565-83. In polyethylene film, painted yellow pigment preparation extracted from biomass, there are no agglomerates, as well as the migratory ability of the pigment of the polymer.

The results presented in table 2 show that at the optimum ratio of components in the colored resin composition (examples 8,10) on basic stamps PE 80B-227 and PE NT indicators meet the standards THAT 2243-171-00203335-2007 and THE 2243-175-00203335-2007. We offer colored polymer composition is characterized by high raspadaemosti in high-molecular organic compounds - olefins, provides a uniform coloration of polymers. Using biological dye - microbial pigment carcinosarcoma colored polymer composition does not alter the physico-mechanical properties of polyethylene.

A significant advantage of microbial yellow pigment preparation carcinosarcoma is low pigment content in polyethylene concentrates, up to 0.1 wt.%, compared with the organic dye used in modern chemical technology, Microlaena yellow 3G, where its content in the concentrate is 4-10 wt.%, and in polyethylene compositions is 0.2 - 0.6 wt.%.

Based on the e use of biological dye - yellow pigment carcinosarcoma assortment colored polymer compositions that meets modern innovation in the chemical industry and ecology.

1. Polymer colored composition comprising a high-pressure polyethylene and pigment, characterized in that as a pigment it contains yellow pigment preparation carcinosin derived from biomass Micrococcus luteus as the product of its alkaline hydrolysis or extract product of alkaline hydrolysis of the specified biomass polar organic solvent, in the following ratio, wt.%:

specified yellow pigment preparation5,0-20,0
the specified polyethylenerest

2. The composition according to claim 1, characterized in that the biological content of the yellow pigment carcinosarcoma in colored plastic compositions of 0.02-0.1 wt.%.

3. Polymer colored composition comprising low density polyethylene and pigment, characterized in that as a pigment it contains yellow pigment preparation carcinosin derived from biomass Micrococcus luteus as the product of its alkaline hydrolysis is whether the extract product of the alkaline hydrolysis of the specified biomass polar organic solvent, in the following ratio, wt.%:

specified yellow pigment preparation with
pigment content of 0.045-0.06 wt.%10,0
the specified polyethylenerest

4. Composition according to claims 1, 3, characterized in that it contains
a) yellow pigment preparation carcinosin isolated from microbial biomass Micrococcus luteus, processed with alkali, followed by extraction of the pigment from biomass polar solvent,
b) yellow pigment preparation carcinosin contained in the treated alkali biomass.

5. Composition according to claims 1, 3, characterized in that the alkaline hydrolysis is carried out by introducing into biomass NaOH based 4,0-20,0 g/kg of biomass.



 

Same patents:

FIELD: food industry.

SUBSTANCE: proposed is a synthetic food colorant in the form of a dispersed system containing an emulsifier and a dispersed phase comprising the synthetic food colorant within a dispersed medium represented by a liquid fat substance. The dispersed phase is represented by water solution of at least one water-soluble synthetic food colorant and food solvent, the quantity ratio of components of the synthetic food colorant (wt %) being as follows: water-soluble synthetic colorant - at least 4, water solution of synthetic food colorant - 6-10, emulsifier - 33-37, liquid fat substance - balance. Additionally, one describes a method for production of the specified food colorant involving dissolution of the water-soluble synthetic food colorant in water solution of food solvent, its further stirring with the emulsifier and mixture with the liquid fat substance to produce the dispersed system.

EFFECT: enhanced colouring ability in fat-containing products.

11 cl, 1 ex

FIELD: food industry.

SUBSTANCE: method envisages milling the original raw stock represented by anthocyan hybrid form of the cultivated flint corn (Zea mays L) plant, extracting colourants with anthocyan water at a temperature of 20°-40°C during 10 min - 1 hour with continuous agitation. Exclusion of the necessity of chemical reagents application enhances environmental friendliness of the colouring agent production process.

EFFECT: enhanced degree of anthocyans solubility in the extragent, improved productivity and reduced technological process duration, increased colouring agent yield, energy saving.

3 ex

FIELD: chemistry.

SUBSTANCE: carminic acid lacquer and use thereof in food products such as yoghurt, fruit additives, drinks and other various food products which need a stable red colour, and in cosmetics.

EFFECT: high output of carminic acid in lacquer and high quality of the lacquer.

10 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: water sample containing synthetic food dyes is mixed with ammonium sulphate until achieving its concentration in the solution of 43 wt %. The mixture is extracted with a mixture of acetone - 2-propanol solvents in ratio of 60:40 wt % in volume ratio of the mixture of solvents to the aqueous solution equal to 1:10. The extract is separated. The mixture of dyes separated through thin layer chromatography on Silufol plates. The mobile phase used is a mixture of acetone-isobutyl alcohol-potassium hydroxide solution with concentration of 0.1 mol/dm3 in volume ratio of 0.5:1:0.5-0.7. Chromatographic separation takes not more than 60 minutes. The dyes are identified from colour and/or shift factor which is calculated using the formula: Rf = X/Xf, where X the shift front of the identified dye; Xf is the shift front of the solvent.

EFFECT: proposed method enables identification of six synthetic dyes E102 Tartrazine, E110 Sunset Yellow, E122 Azorubine, E124 Ponceau 4R, E129 Allura red, E132 Indigo Carmine separately or in a mixture using less toxic solvents and reduction of the detection level.

1 cl, 1 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention describes a method of detecting red natural carmine dye in the presence of synthetic dye E122 in an aqueous solution, involving addition of crystalline sodium chloride to the aqueous solution of the mixture of carmine and synthetic dye E122 until attaining salt concentration of 35 wt % in the solution, ethyl acetate is added in volume ratio of solvent to aqueous salt solution equal to 1:10 and extracted after 10 minutes on vibromixer. Further, the organic phase which contains synthetic dye E122 is extracted. Optical density A of the equilibrium aqueous salt solution is measured and content of carmine is calculated using the formula: C = A / ℓ· k, where k is light absorption coefficient, dm3/(mol·cm); ℓ is thickness of the light absorbing layer (ℓ = 1 cm); C is concentration of carmine dye, mol/dm3.

EFFECT: method enables selective extraction of red synthetic dye E122 from a saturated sodium chloride solution through extraction with ethyl acetate (R=96%) in 10 minutes, red natural carmine dye is virtually not extracted in these conditions (R=0%).

FIELD: chemistry.

SUBSTANCE: invention relates to analytical chemistry of organic compounds and can be used to concentrate sulfoazo dye E102 during analytical inspection of aqueous media and food products. The invention describes a method of concentrating sulfoazo dye E102 from an aqueous solution, involving addition of crystalline ammonium sulphate to the aqueous solution of sulfoazo dye E102 until achieving 42-43 wt % salt concentration in the solution and adding polyethylene glycol PEG-5000 in amount of 1% of the weight of the initial solution. The obtained mixture is weighed (mtot), extracted for 10 minutes, centrifuged for 30 minutes at 2000 rpm and the dye concentrate is separated from the aqueous phase (morg). The concentration coefficient (under the condition of virtually complete extraction R=96-99%) is calculated as a ratio: K=maq./torg., where maq. and morg. are mass of the aqueous and organic phase respectively.

EFFECT: method provides virtually complete extraction of sulfoazo dye E102 from an aqueous solution through single-step extraction and its 50-times concentration using environmentally safe polyethylene glycol PEG-5000.

1 cl, 1 ex

FIELD: chemistry.

SUBSTANCE: described is a method of producing a concentrate of anthocyan dye from aqueous solutions through extraction with an organic reagent - water-soluble poly-N-vinylcaprolactam in amount of 0.1-0.5 wt % of the initial solution, a salting-out agent - sodium chloride in amount of 26.5 wt % of the initial solution. The organic phase is heated to 32-37°C and the dye concentrate is separated from the precipitated poly-N-vinylcaprolactam.

EFFECT: increased purity of the obtained concentrate of anthocyan dye which is free from the organic reagent, with reduction of the cost of the end product.

1 cl, 2 ex

FIELD: food industry.

SUBSTANCE: method involves cleaning the vegetable raw material, extracting it with 0.1 hydrochloric acid solution, filtration, sorption by means of sorbent with clay content of 10% minimum. After sorption the sorbent with anthocyanins from the mother solution is centrifugally separated, the mother solution is removed and the following desorption is performed with a solvent which is 1% hydrochloric acid solution in ethanol centrifugally separating re-extract from the sorbent.

EFFECT: invention enables to simplify the method, improve the target product quality and increase storage stability.

1 tbl, 2 ex

FIELD: food products.

SUBSTANCE: invention can be used for dying food products in yellow. Method provides for extract of colouring matter by water-soluble poly-N-vinylpyrrolidone in presence of 40% ammonium sulfate.

EFFECT: invention allows to intensify the process of obtaining carotinoid colouring matter concentrate.

2 ex

FIELD: technological processes; chemistry.

SUBSTANCE: method of cedar bark integrated processing is described, which includes extraction of bark with nonpolar dissolvent with extraction of coniferous wax, further extraction of anthocyanidin colouring agent from bark and processing of bark remains into active coal, at that after preparation of anthocyanidin colouring agent bark remains are subjected to extraction with 0.4-1.0% aqueous solution of ammonium oxalate at the temperature of 95-100°C with extraction of pectin.

EFFECT: suggested method provides achievement of practically complete utilisation of cedar bark with preparation of coniferous wax; anthocyanidin colouring agent; pectin and active coal and makes it possible to increase pectin output and its quality.

1 dwg, 3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention describes multimodal polyethylene which is suitable for use as a film, as well as a pipe. The polyethylene is characterised by density between 0.940 and 0.965 g/cm3, flow melt index l21 between 4 and 20 dg/min. The polyethylene contains a low-molecular ethylene copolymer, having weight-average molecular weight between 5000 and 50000 amu, characterised by short-chain branching index between 2.5 and 4.5; and high-molecular ethylene copolymer, having weight-average molecular weight between 60000 and 800000 amu, characterised by short-chain branching index between 2 and 2.5. The invention also describes multimodal polyethylene, where the weight ratio of the high-molecular ethylene copolymer in terms of the overall multimodal composition is between 0.3 and 0.7. The ratio of branching indices of the low- and high-molecular ethylene copolymers is between 1.2 and 6.0.

EFFECT: balance of short-chain branches makes multimodal polyethylene suitable for use in making films, pipes, in fields using centrifugal moulding and blow moulding.

23 cl, 5 dwg, 6 tbl, 4 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of microporous polyethylene membranes to be used in storage battery separators. Membrane is produced by mixing polyethylene resin melt and membrane-forming solvent to prepare solutions of polyethylene resin A with concentration of 25-50% by wt and with that B of 10-30% by wt. Note here that concentration of A exceeds that of B. Melts are simultaneously extruded through spinneret, extrudate is cooled to produce gel-like sheet wherein resins A and B are laminated and membrane-forming solvent is removed. Solutions of resins A and B may be extruded through separate spinnerets with removal of membrane-forming solvent from obtained gel-like sheets A and B, formation of microporous polyethylene membranes A and B and their lamination in controlling mean diametre of pores over membrane depth.

EFFECT: microporous polyethylene membranes with balances mechanical properties, permeability, anti-shrinking properties, resistance to compression, absorption capacity, and pore mean diametre varying over membrane depth.

5 cl, 2 tbl, 16 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a biodegradable thermoplastic composition used in making films and various hot-moulded articles in form of consumer packaging. The composition contains polyethylene, a copolymer of ethylene and vinylacetate, starch, nonionic surfactant and schungite.

EFFECT: composition has good rheological characteristics and is biodegradable under the effect of light, moisture and soil microflora.

2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: composition contains crystalline propyelen polymer, elastomeric copolymer of ethylene and propylene and polyethylene. When combined with components with certain values of polydispersity index and characteristic viscosity in given ratios, the composition exhibits high hardness, impact resistance and resistance to bleaching under loading. The composition has flexural modulus higher than 1300 MPa, resistance to bleaching during impact corresponding to diametre of the bleaching area not greater than 1.7 cm, caused by a die falling from a height of 76 cm and diametre of the bleaching area not greater than 1.2 cm, caused by a die falling from a height of 20 cm, and Izod impact resistance at 23°C greater than 14 kJ/m2 and at least equal to 6.5 kJ/m2 at -20°C.

EFFECT: composition has good balance of mechanical properties, is suitable for making articles through pressure casting, such as casings of batteries and consumer goods, and during hot shaping processes.

2 cl, 4 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: composition contains polyethylene production and/or household wastes, beet pulp and bentonite as a processing additive.

EFFECT: disclosed composition has rheological characteristics which meet requirements for polymeric materials for their possible processing on conventional equipment, as well as required operational characteristics, including biodegradability.

4 ex, 2 tbl

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: process engineering.

SUBSTANCE: invention relates to multilayer microporous polyethylene membrane and storage battery made thereof. Proposed membrane has at least two microporous layers. One layer (a) of polyethylene resin A contains high-density polyethylene A with 0.2 and more end vinyl groups per 10 000 carbon atoms defined by IR-spectroscopy. Second microporous layer (b) of polyethylene resin B contains high-density polyethylene A with smaller than 0.2 end vinyl groups per 10 000 carbon atoms defined by IR-spectroscopy. Said membrane is produced by two methods. First method comprises simultaneous extrusion of solutions of polyethylene resins A and B through spinneret, cooling of extrudate, removing of solvent and laminating. Second method comprises extrusion of said solutions through different spinnerets. Said membrane is used to produce storage battery separator.

EFFECT: well-balanced characteristics of melting and cutting-off, good forming property of film and separator and anti-oxidation properties.

4 cl, 1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: moulding method involves heating thermoplastic material higher than melting point, forcing the obtained melt through a die at 10-100°C higher than melting point of the thermoplastic material and cooling the product to temperature lower than melting point. The composition of thermoplastic material includes a thermoplastic polymer and a complex additive for improving moulding. The complex additive used is a reactive composition containing at least one polyether polyol and at least one thickening component selected from a group comprising polybasic organic acids, anhydrides of polybasic organic acids, fatty acids containing 8-18 carbon atoms, as well as mixtures thereof.

EFFECT: method cuts on induction time, increases rate of flawless moulding thermoplastic material, reduces power consumption and moulding temperature, lowers pressure in the equipment when moulding high molecular weight polymers, simplifies and lowers the cost of moulding articles from thermoplastic polymer materials.

12 cl, 11 dwg, 14 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing composite nanomaterials for antifrictional purposes. The materials can be used in systems working under high deformation loads and in friction assemblies. The method involves mechanical activation of powder filler in form of sheet silicate in a ball mill in high-speed mode. Further, the powder filler is then mixed with powdered ultra-high molecular weight polyethylene for 10-60 minutes in a high-energy mill combined with mechanical activation.

EFFECT: obtained mixture is starting material from which articles with improved tribological characteristics, high mechanical strength and elasticity are moulded.

2 cl, 9 dwg, 2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to polymer materials meant for making articles via rotational moulding. The rotational moulding polymer material contains particles of a thermoplastic polymer or a mixture of thermoplastic polymers on whose surface there are silicon oxide particles whose size ranges between 1 and 1000 nm in amount of 0.001-0.1% of the total weight of the polymer material.

EFFECT: obtained material cuts on moulding time without considerable overheating of the molten mass with simultaneous removal of bubbles, as well as high mechanical strength of the articles.

5 cl, 36 dwg, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to substances for improving processing characteristics for elastomeric mixtures. The method of preparing the elastomeric mixture involves contact between an elastomer with a substance for improving processing properties, which contains a reaction product of a functionalised polymer having an anhydride group in contact with a polyamine which contains a primary amine. The elastomer is halogenated rubber, starry rubber or a random copolymer of isobutylene styrene and methylstyrene. The functionalised polymer includes a star formed from C2-C12 α-olefin or from C4-C10 isoolefin. Elastomeric mixtures are used in articles such as inner linings and in other tyre components.

EFFECT: invention improves processing properties of the elastomeric mixture, reduces permeability of the tyre component.

18 cl, 10 tbl

Up!