Method of emulsion polymerisation rubber stabilisation
SUBSTANCE: N (4-anilinophenyl)amide of alkenylsuccinic acid of general formula , where n=6-18 is used as a stabiliser of phenylenediamine type. The stabiliser is introduced into latex in amount 0.1-1.5 weight fractions per 100 weight fractions of rubber as aqueous alkaline liquor. While using the stabiliser of low content of ballast substance less than 3% and high content of fragments of phenylenediamine type, is suitable to be introduced into latex.
EFFECT: maintained effective stabilisation and eliminated odour nuisance.
4 tbl, 12 ex
The invention relates to the stabilization of unsaturated elastomers, in particular rubber emulsion polymerization.
Known method of stabilizing unsaturated elastomers by introducing them at the stage of obtaining rubber or vulcanizates N,N'-diphenylethylenediamine-1,4 (diafana FF) (Chemical additives to polymers. The Handbook. - M.: Chemistry, 1984, p.28). Deafen FF is used in dosages of 0.5-1% rubber. The disadvantages of this method are related to poor solubility of diafine FF in polymers and difficulties of introducing it into the rubber emulsion polymerization, as a result this method is not used in industry to stabilize rubber emulsion polymerization and latex.
There is also known a method of stabilization of rubbers and rubbers using as an antioxidant N-isopropyl-N'-phenyl-n-phenylenediamine (diafana AF) by entering it into the rubber at the stage of selection of rubber or rubber mixture during its preparation on rollers or rubber mixer (Handbook of reinsta. - M.: Chemistry, 1971, s). Deafen AF is used in dosages of 0.5-1.5%, usually in combination with other antioxidants. The disadvantages of this method are its high volatility and high solubility of the resulting oxidant in acidic aqueous solutions, as a consequence, its application to the stabilization of rubbers, emulsi is authorized polymerization is limited when coagulation it is largely washed out from the rubber and into the waste water.
There is also known a method of stabilization of synthetic polymers by introducing them to the product of the interaction of a copolymer of maleic anhydride with ethylene or α-olefins or styrene, or octadecanol, or methylviologen ether with compounds containing both hydrazide or amine group and grouping spatially constrained phenol or space-constrained Amin and other groups responsible for the stabilizing effect (US No. 4863999, MKI T08F 8/30, 05.09.1989). The disadvantage of this method is the poor compatibility of the obtained antioxidants with most mass rubbers, such as butadiene-styrene, polybutadiene, polyisoprene.
There is also known a method of stabilizing, according to which an antioxidant, which is a product of interaction epoxidizing linseed oil with an aromatic amine, such as naphtylamine, aniline, toluidine, anisidine injected into a natural or synthetic rubber (..Badran, A.F.Youman, e.a. High - M.W. material as antioxidant and antiradiations agent. Elastomerics, V.122, no. 2. p.26-33, 1990). The antioxidant is introduced into the rubber compound in the amount of 2-3 parts by weight per 100 parts by weight of rubber. The disadvantages of this method are that the antioxidant to be used in large enough quantities 2-3 wt.%); in the synthesis of antioxidant parallel reactions intermolecular crosslinking, leading to trudnoperevarivaema increasing molecular weight and poor technological properties of the obtained product; it is also difficult introduction of the obtained product in the latex rubber emulsion polymerization because of the difficulties of preparing stable emulsions.
The closest is the method of stabilization of rubbers by using as an antioxidant product interaction malaysiaand tall oil containing resin and fatty acids in a weight ratio of 1-2:1, respectively, with a mass fraction of bound maleic anhydride from 10 to 30%, n-aminodiphenylamine when the mass ratio maledizione tall oil: n-aminodiphenylamine 100:18-54 supplied in quantities of 1.5 to 5.0 parts by weight per 100 parts by weight of rubber in the form of an aqueous-alkaline solution (RU # 2130031, IPC 6 SA 6/14, 236/10, 236/12, SL 5/20, 25.12.1996). The disadvantages of this method are the following:
1. The content in the product fragments phenylenediamine, responsible for stabilizing the action is 15-30%, which necessitates the use of a stabilizer in a high enough dosage to effectively protect rubber from aging: typically 1.5 to 5.0 wt.% on the rubber.
2. Maledizione tall oil may contain up to 20% neutral what's substances, who are the "ballast" - a product that did not protect the elastomer from aging.
3. The disadvantage is an unpleasant odor containing tall oil products.
The task of the invention is to develop a method of stabilizing rubber emulsion polymerization, does not require high dosages of the stabilizer, but still retaining its effectiveness on the same level as the known methods.
The technical result consists in the use of antioxidant with a high content of fragments phenylenediamine type, with a low content of ballast substances and impurities, and does not cause odors them stable rubber emulsion polymerization.
The technical result is achieved by the method of stabilization of rubbers emulsion polymerization provides an introduction to latex stabilizer phenylenediamine type N(4-anilinophenol)amide alkenylamine acid of General formula:
in an amount of 0.1 to 1.5 parts by weight per 100 parts by weight of rubber in the form of an aqueous-alkaline solution.
Used according to the claimed method stabilizer, N - (4-anilinophenol)amide alkenylamine acid is characterized by the content of the basic substance is not less than 97%, it contains a small number of "ballast" in the Yessei. Also, the content of the stabilizer phenylendiamine fragment responsible for the stabilizing effect varies depending on the length of the hydrocarbon radical from 35,5 49.0%, and thus significantly higher than in the known method. Because of this stabilizer is used in small doses: 0.1 to 1.5% rubber (best of 0.2-0.6%, depending on the type of rubber). In addition, stabilized according to the claimed method rubber emulsion polymerization does not have an unpleasant odor.
Table 1 presents data about the properties of rubber Nitrilase-26M, stabilized by various antioxidants (examples 1, 2).
Table 2 presents data on the properties of rubber Nitrilase 18M, stabilized by different antioxidants (examples 3-8).
Table 3 presents data on the properties of rubber BNX-AN and its vulcanizates, stabilized by various antioxidants (examples 9-10).
Table 4 presents data on the properties of rubber SKS-ARKM-27 and its vulcanizates, stabilized by various antioxidants (examples 11-12).
For the introduction of an antioxidant in the rubber from it is prepared 15-25%water-base emulsion. The emulsion is mixed with the latex in all respects. It does not reduce aggregate stability of the latex. When selecting the rubber of l is Tex antioxidant remains in the rubber and not washed away with the waste water. The selection can be done in various ways: 1) use for coagulation of a mixture of electrolytes: salt (sodium chloride)+acid, 2) the use of salt-free coagulant (Quaternary ammonium base, a protein) in combination with acid, 3) use as coagulants salts of polyvalent metals (calcium chloride, magnesium chloride, aluminum sulfate).
In accordance with this method may be carried out to stabilize any rubber emulsion polymerization; for example, butadiene-nitrile, butadiene-styrene (methylstyrene), polybutadiene, as well as commodity latexes.
During implementation of the invention used the following test methods:
Physico-mechanical properties of rubbers and vulcanizates was evaluated by the following methods:
Rubber nitrile butadiene;
Nitrilase - TU 38.40.350-99
Synthesis of stabilizer is carried out in accordance with the following General method:
In a reactor equipped with a stirrer, jacketed for coolant, download alchemistry anhydride or a mixture alchemistry anhydrides and n-aminodiphenylamine when the molar ratio of the components is 1:1. The process is conducted under stirring at a temperature of 65-75°C. for 1.5 hours. The product has the appearance of a dark, viscous, oily the liquid. For the introduction of the stabilizer in the rubber from it is prepared of 20±5%concentration aqueous alkaline emulsion with a pH of 9-11.
Synthesis of stabilizer may also be carried out in a solvent. In this case, after preparation of the emulsion, the solvent is distilled from it.
The invention is illustrated by examples of specific performance.
The coagulation apparatus, equipped with a mechanical stirrer and a jacket for heating, serves 5 kg of the latex of butadiene-nitrile rubber Nitrilase-26M (rubber production JSC "Voronezhsintezkauchuk", mass fraction of bound Acrylonitrile in the rubber - 27,5%). The dry matter content in the latex to 18.5%, a pH of 10.3. Include a mixer and serve him 14.0 g of 20%aqueous-alkaline solution of N - (4-anilinophenol)amide dodecanesian acid (dosage stabilizer of 0.3 parts by weight per 100 parts by weight of rubber). The mixture is stirred for 10 min, heated to 50°C., poured 1250 g of sodium chloride solution in water (concentration of 24%), resulting flocculate poured a 0.3%solution of sulfuric acid to pH 3.0. Released crumb rubber is separated from the serum, three times washed with softened water, wring out moisture on the worm Assembly (moisture content of 7.2%) and dried in an air dryer at a temperature of 80-100°C. the volatile content in the rubber of 0.25%).
To test the stabilizing properties of the product, rubber machining is to provide testing under conditions of accelerated aging:
1. Heat treatment in an air thermostat, t=150°C, time : 60 min Estimate the solubility of the rubber before and after aging.
2. Rubber is prepared rubber compound, mixture vulcanized and vulcanizer is subjected to thermal ageing in air thermostat (t=100°C, the ageing time - 120 hours). Conduct a comparative evaluation of physical and mechanical properties of the vulcanizate before and after aging. The results are given in table 1.
Example 2 (prototype)
All operations carried out analogously to example 1. The stabilizer uses the product of the interaction malaysiaand tall oil with n-aminodiphenylamine (mass ratio malaysiaand tall oil and n-aminodiphenylamine 100:20) in an amount of 1% rubber. The rubber vulcanizer obtained on its basis, analyze analogously to example 1. The properties of the rubber vulcanizate are shown in table 1.
All operations is carried out in accordance with example 1. Use latex rubber Nitrilase-18 (the content of the linked Acrylonitrile - 18,6%). As the stabilizer, use N(4-anilinophenol)amide alkenylamine acid with different hydrocarbon radicals, and vary the dosage of stabilizer is from 0.1 to 1.5 parts by weight per 100 parts by weight of rubber. The results are given in table 2.
Example 8 (prototype)
All operations is carried out in accordance with examples 3-8. At the same time as antioxidant use the product of the interaction malaysiaand tall oil with n-aminodiphenylamine with a ratio of 100:20. The results are given in table 2.
Thus, example 1-2, it follows that stabilized the claimed method the antioxidant effectively protects butadiene-nitrile rubbers and vulcanizates based on them from aging, not giving this a known method.
Analogously to example 1, a latex rubber BNX-ANN (the content of the linked Acrylonitrile - 29%) injected emulsion N(4-anilinophenol)amide alkenylamine acid (a mixture of amides with n=12 and n=14 in the ratio of 70:30) at the rate of 0.35 parts by weight of stabilizer per 100 parts by weight of rubber. The mixture is stirred for 10 min, heated to 55°C and served in it a solution of calcium chloride. The resulting crumb rubber is separated from the serum, washed with softened water, press on the worm Assembly and dried in an air dryer. The rubber vulcanizer on its basis are tested on aging. The test results are shown in table 3.
Example 10 (prototype)
Analogously to example 10 get rubber stabilized in a known manner, using the product of the interaction malaysiaand tall oil with n-aminodiphenylamine (aspect] is the solution components 100:20). The test results of rubber and its vulcanizate are shown in table 3, from which it follows that declared stable by the way the rubber is not inferior to the properties of the rubber, stabilized in a known manner. Thus the dosage of stabilizer in the first embodiment are almost three times less.
Examples 11 and 12
Get samples of oil-filled styrene butadiene rubber SKS-ARKM-27, stable known and stated ways. To do this in latex rubber with a dry matter content of 21.2% of the injected emulsion by known and declared the ways in dosages respectively to 1.7 and 0.4 parts by weight per 100 parts by weight of rubber. In the known method uses the product of the interaction malaysiaand tall oil with n-aminodiphenylamine mass ratio of 100:20, in the proposed method alkanolamide succinic acid with n=12 - 14 (ratio 70:30). The latex is heated to 60°C, serves sodium chloride, the resulting flocculate enter the oil-filler MO-6 in the amount of 16.5 wt.% (the oil content in the finished rubber), acidified with sulfuric acid to a pH of 3.2. Crumb rubber is separated, washed with water, wring out, dry up. The rubber vulcanizer analyze methods of accelerated aging. The results are shown in table 4.
The method of stabilization of rubbers emulsion polymerization by introducing a stabilizer phenylendiamine type, N(4-anilinophenol) amide alkenylamine acid of General formula:
served in the latex in an amount of 0.1 to 1.5 parts by weight per 100 parts by weight of rubber in the form of an aqueous-alkaline solution.
SUBSTANCE: method involves reacting derivative of maleic anhydride with n-aminodiphenylamine while heating to temperature not above 90°C. The derivative of maleic anhydride used is alkenyl succinic anhydride or a mixture of alkenyl succinic anhydrides of general formula: , where n=6,8,10,12,14,16,18 with molar ratio of maleic anhydride links to n-aminodiphenylamine equal to 1.0-1.05:1.0.
EFFECT: improved processing characteristics of antioxidant, characterised by low dropping point, high efficiency for emulsion-polymerised rubber and latex, protection of said rubber from thermal-oxidative ageing.
1 tbl, 7 ex
SUBSTANCE: invention relates to compositions for making objects, for example tyres, tyre threads. This composition contains (a) natural or synthetic elastomer, subject to oxidative, thermal, dynamic, light and/or ozone induced decomposition, (b) white reinforcing filler and (c) linking agent. Component (c) used is at least one formula (I) compound: or oligomeric product from hydrolysis of formula (I) compound. Also described is a method of binding the white reinforcing filler with the elastomer composition, reinforced with white filler, involving introduction of at least one formula (I) linking agent into the elastomer and subsequent vulcanisation of the composition. Tyres made from the proposed composition have high tractive resistance.
EFFECT: improved final mechanical characteristics of elastomer, such as breaking extension, compression set and heat release.
18 cl, 7 ex, 4 tbl
SUBSTANCE: invention relates to a gaseous barrier layer in elastomer inflated objects, which contain gas, such as air, under pressure. In particular, the barrier layer can include a bus for preventing migration of oxygen and other gaseous components through the bus. The barrier layer is made from at least one elastomer, laminar mineral particles, which reduce permeability, reinforcing filler, cross-linking agent and from 1 to 50 wt pts terpenic hydrocarbon resin per 100 parts of elastomer. Glass transition temperature of the terpenic resin is almost 50°C higher and softening temperature is lower by almost 170°C.
EFFECT: improved manufacturability of the composition and improved permeability properties of the barrier layer.
37 cl, 1 dwg, 8 tbl, 11 ex
SUBSTANCE: invention relates to field of polymer materials science, namely to electroconductive materials with positive temperature resistance coefficients, and can be applied for production of electric heating elements, which are applied for heating of pipelines, intended for transportation of highly viscous products, for instance, oil and oil products. Material by invention contains, wt %: rubber mixture of mark B-14 - 50-55, superhighlymolecular polyethylene -15-20, coke -30-35. Coke is preliminarily mixed with superhighlymolecular polyethylene.
EFFECT: obtaining electroconductive composition material with using cheap and available ingredients.
1 dwg, 1 tbl
SUBSTANCE: invention relates to field of elastomer compositions, in particular to quickly hardened compositions of rubber mixtures, for rubber products, such as tyres, tyre breakers, hoses and tyre treads. Composition of rubber mixture contains diene caoutchouc, vulcanisation ultra-accelerator and from 3 to 10 phr (per 100 weight parts of caoutchouc by mass) the following compound: R1-NHphenyl-NH-R2, where amine fragments occupy 1st and 4th positions in phenyl cycle and R1 and R2 are selected from group including: H, C1-C3-alkyl groups with straight or branched chain, C4-C5-alkyl groups with straight or branched chain and C6-C15-alkyl groups with straight or branched chain, and where R1 and R2 can be similar or different; and where increased stability during storing is expressed in that value t90 of time required for 90% completion of hardening, isothermal at 125°C, after 28 days of ageing at 40°C constitutes within the limit of 30% of isothermal t90 value for unaged composition. Invention also includes method of tyre tread recovering using said composition as binding rubber mixture and method of tyre repair.
EFFECT: prevention of premature hardening of rubber mixture.
16 cl, 2 dwg, 7 tbl, 5 ex
SUBSTANCE: invention relates to field of polymer material science, namely to electroconductive materials with positive temperature coefficient of resistance, and can be applied for production of electric heating elements, used for heating of pipelines, intended for transportation of highly viscous products, for instance, oil and oil-products. In invention method mixing of components, pressing with following milting of obtained semi-product to powder-like condition is performed. Composition of material consists of, wt %: 50-55 of rubber mixture B-14, 15-20 superhigh molecular polyethylene, 30-35 coke. First coke is mixed with superhigh molecular polyethylene. Then mixture is pressed under 15 MPA, milted and introduced in raw rubber mixture B-14. Extrusion of composite is carried out at 140-145°C, in head - 150°C, time - 20-25 min.
EFFECT: simplification of method and obtaining of material using available and cheap ingredients.
1 dwg,1 tbl
SUBSTANCE: proposed composition of vulcanisation promoter contains modified calcium carbonate (A), treated on the surface of a fatty acid or rosin acid, as well as silic acid, inorganic filler (B), with oil adsorption from 50 to 300 ml/100g and a vulcanisation promoter component (C), which is liquid at room temperature. The ratio (A):(B) lies between 30:70 and 95:5, and content of (C) ranges from 30 to 80%, of the total composition of the promoter. The rubber composition, in which the powdered white composition of vulcanisation promoter and precipitated silica are added to rubber, contain the vulcanisation promoter (C) from 1 to 40 wt pts per 100 wt pts of precipitated silica.
EFFECT: composition is stable during storage and provides for resistance of its mixture with rubber or something similar to heat build-up.
6 cl, 3 tbl, 5 ex
SUBSTANCE: invention concerns asbestos-free polymer friction compositions and can be applied in production of brake shoes. Composition includes, wt %: linking agent out of high-molecular unsaturated hydrocarbon rubbers 19-24; mineral fillers of concentrated barite 18-25 and alumina 6-8; asbestos-free fibrous filler of kevlar pulp 1.5-3.0, arselon pulp 1.5-3.0, and wollastonite 2-5; carbon fillers of Carbon black 6.95-15.0, and graphite 24-30; curing group of sulphur 1-3, 2-mercaptobenzothiazol 0.5-0.9, and thiuram 0.03-0.15.
EFFECT: enhanced durability, friction rate stability of products manufactured on the basis of claimed composition, reduced product cost and emission of hazardous substances to environment.
SUBSTANCE: destruction of sulphur bridges and recovery of sulphur is ensured by bioprocessing of rubber particles in a medium containing mesophilous, anaerobic and/or mesophilous, optionally anaerobic and/or mesophilous microaerophilic bacteria and/or one or more enzyme system of the specified bacteria in environment appropriate for the specified bacteria living.
EFFECT: improved vulcanisation ability of processed rubber particles, and better quality of rubber products provided.
23 cl, 1 tbl
SUBSTANCE: invention relates to the method of modifying general- and special-purpose rubber mixes and rubbers built around high-molecular carbon-chain polymers. Modification of rubber mixes and rubbers is carried out with the help of low-molecular unsaturated polyketones incorporating carbonyl groups and double C=C bonds statistically distributed over the polymeric chain. Modification is effected by adding 0.5 to 50 wt % of low-molecular unsaturated polyketones to the rubber mix, the aforesaid percentage being related to the total content of high-molecular polymer and low-molecular unsaturated polyketone. Note that unsaturated polyketones used for modification contain 0.1 to 16 wt % of oxygen in the form of carbonyl groups and feature a number average molecular weight of 500 to 100000.
EFFECT: improved of technical characteristics of rubber mixes and increased strength characteristics of rubbers produced by vulcanisation of such rubber mixes.
7 cl, 11 tbl, 8 ex
SUBSTANCE: invention relates to improved method of preparing solid particles used as phenolic antioxidants and including in, in fact, crystal form compound of formula: in which one of R1 and R2 independently on each other represent hydrogen atom or C1-C4alkyl, and the other one represents C3-C4alkyl; x represents zero (direct bond) or number from one to three; and Y represents C8-C22alkoxy or groups of incomplete formulas
or in which one of R1' and R2' independently on each other represent hydrogen atom or C1-C4alkyl, and the other one represents C3-C4alkyl; x represents zero (direct bond) or number from one to three; y represents number from two to ten; and z represents number from two to six, in which homogeneous water dispersion is prepared, which includes compound (I) or mixture of such compounds, where R1, R2, R1' R2', Y, x, y and z have values given above, by addition of incomplete ether of fatty acid polyoxyethylene sorbitan and inoculating crystals, and obtained crystals are separated from dispersion and process is carried out until solid particles are obtained. Invention also relates to novel crystal forms pentaerythrite tetrakis-[3-(3,5-ditret-butyl-4-hydroxyphenyl)propionate], (µ-form) of pentaerythrite tetrakis 3-(3,5-ditret-butyl-4-hydroxyphenyl)propionate], crystal form of N,N'-hexane-1,6-diyl-bis-[3-(3,5-ditret-butyl-4-hydroxyphenyl propionamide)], crystal form of N,N'-hexane-1,6-diyl-bis-[3-(3,5-ditret-butyl-4-hydroxyphenyl propionamide)] and crystal modification (β-form) of N,N'-hexane-4,6-diylbis-[3-(3,5-ditret-butyl-4- hydroxyphenyl propionamide)].
EFFECT: elaboration of improved method of preparing solid particles used as phenolic antioxidants.
10 cl, 2 ex
SUBSTANCE: proposed composition contains a) synthetic polymer and b) one or several compounds of formula or where R1, R2 and R3 or Y1, Y2 and Y3, or Z1, Z2 and Z3 represent, for example branched C3-C20alkyl.
EFFECT: possibility of significantly reducing blushing of polymers.
41 cl, 10 tbl, 90 ex
SUBSTANCE: invention refers to making butyral resin sheet for laminated nonshattering glass. Polymer sheet is made of plasticised butyral resin containing fatty acid amide as anti-blocking additive. Sheet is made by extrusion of the melt. Produced laminated safety glass contains two glass sheets and plasticised butyral resin interlayer of blocking intensity at least 50% less than that of polymer sheet composed the same, but not containing fatty acid amide, of opacity 3% less and adhesion value within 20% of deviation of adhesion value of polymer sheet composed the same, but not containing fatty acid amide.
EFFECT: designed improved laminated safety glass.
18 cl, 4 ex, 4 tbl
SUBSTANCE: stabilising composition is described, containing (A) compound of 2,4-bis-(4-phenylphenyl)-6-(2-hydroxyphenyl)-1,3,5-triazine series by formula (I), and (B) one or more compounds chosen from group, which include benzotriazoles by formula (IIa), 2-hydroxybenzophenones by formula (IIb), oxanilides by formula (IIc), 2-hydroxyphenyltriazines by formula (IId), cinnamates by formula (IIe), and benzoates by formula (IIf). There are also described: composition, containing stabiliser composition and organic material; method for organic material stabilisation; and application of stabiliser composition to organic material stabilisation.
EFFECT: increase in efficiency of labile organic materials stabilisation.
17 cl, 19 tbl, 24 ex
FIELD: inorganic chemistry.
SUBSTANCE: invention refers to production of nanocomposites using olefinic polymeric matrix and smectite clay. Polyolefine nanocomposite is made by melt mixing (a) polyolefine and (b) smectite clay with at least one intercalating agent occurrence. Ratio of intercalating agent and clay is at least 1:3, assuming ash content rate of specified clay. Hydroxide-substituted esters of carboxylic acid, amides, hydroxide-substituted amides and oxidated polyolefines solid at room temperature are used as intercalating agent. Method versions enable to produce nanocomposites with improved mechanical and barrier properties and high economic indicator "cost-effectiveness".
EFFECT: production of nanocomposites with improved mechanical properties and economic indicators.
32 cl, 1 dwg, 8 tbl, 7 ex
SUBSTANCE: invention relates to production of elastomeric composition based on butadiene-nitrile rubbers used for preparing molded thickening rubber-technical articles working in contact with different automobile oils and lubricants at temperatures below 130°C. Proposed elastomeric composition comprises the following components, mas. p. p.: butadiene-nitrile rubber, 5-70; partially hydrogenated butadiene-nitrile rubber with the residual content of double bonds from 1.0 to 5.5%, 30-95; bis-(tert.-butyl-peroxyisopropyl)-benzene as a vulcanizing agent, 4-8; triallyl isocyanurate as a coagent of peroxide vulcanization, 0.5-2.0; technical carbon, 40-60; stearic acid, 1-3, and antioxidant, 1-3. Composition is prepared by conventional methods. Invention provides enhancing resistance to oil and gasoline, resistance to atmosphere and resistance against accumulation of relative residual deformation at increased temperatures.
EFFECT: improved and valuable properties of composition.
5 cl, 2 tbl
FIELD: biologically active polymer materials.
SUBSTANCE: invention relates to polypropylene compositions showing bactericidal activities and intended for manufacture of any products through molding and extrusion while being suitable for fabrication of polypropylene fibers for water and air filters used in various industry fields and in medicine. Bactericidal polymer composition of invention is composed of polymer and bactericidal additive, said polymer being. in particular, polypropylene in amount 97.00 to 99.92% and said additive (0.03-1.00%) being silver phosphate, silver thiosulfate, or silver stearate. Composition further contains 0.05 to 2.00% of oleic acid amide (Finawax O).
EFFECT: imparted high bactericidal activity extending functional qualities of composition allowing use thereof in various industry fields.
4 cl, 2 dwg, 4 tbl, 4 ex
FIELD: biologically active polymer materials.
SUBSTANCE: invention relates to polyethylene compositions showing bactericidal activities and intended for manufacture of various products through molding and extrusion while being suitable for fabrication of nontoxic packing materials for foods and medical tools, for fabrication of medical- and sanitary-destination molding equipment, toys, furniture, plates and dishes, fibers, and textile articles. Composition according to invention comprises high-pressure polyethylene (71.00-99.04%) and bactericidal additive, the former containing 0.10 to 5.00% silver phosphate, silver thiosulfate, or silver stearate. Composition further contains 0.06 to 1.00% of oleic acid amide (Finawax O), 0.20-2.00% calcium carbonate (Omyacarb 2XKA), 0.50-20.00% ethylene/vinyl acetate copolymer, and 0.10-1.00% silica.
EFFECT: imparted high bactericidal activity extending functional qualities of composition allowing use thereof in various industry fields.
3 cl, 5 tbl, 4 ex
FIELD: organic chemistry, chemistry of polymers.
SUBSTANCE: invention relates to using compounds of the general formula (I): as an initiating agent in seed charge formation of β-form for polypropylene resin. Values of radicals R1, R2 and R3 for compound of the general formula (I) are similar and mean (C1-C20)-alkyl, (C5-C12)-cycloalkyl, (C5-C12)-cycloalkyl substituted with 1, 2 or 3 groups of (C1-C10)-alkyl, cyclohexylmethyl, cyclohexylmethyl substituted with 1, 2 or 3 groups of (C1-C10)-alkyl, phenyl substituted with 1, 2 or 3 groups of (C1-C10)-alkyl or (C7-C9)-phenylalkyl. Films prepared by using compound of the formula (I) are characterized by the dullness value above 62% but preferably above 70% or 80% and the content of crystalline β-form above 15%. Also, invention disclosed monoaxial-oriented or biaxial-oriented films, fibers and multiplayer systems.
EFFECT: valuable properties of materials.
4 cl, 2 tbl, 8 ex
FIELD: polymer materials.
SUBSTANCE: biocyde composition containing polystyrene and biocyde additive is characterized by further including stearic acid amide and in that said biocyde additive contains silver phosphate at following proportions of components: 99.85-99.20% polystyrene, 0.10-0.30% stearic acid amide, and 0.05-0.50% silver phosphate. Composition containing silver thiocyanate and silver stearate as biocyde additive are also described.
EFFECT: enhanced bactericidal activity, expanded functional possibilities when used in various industrial fields in manufacture of materials employing molding and extrusion techniques.
3 cl, 1 dwg, 4 tbl, 4 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to preparing aqueous cationic latexes with hollow polymeric particles serving as multifunctional additives used when preparing polymer compositions, paintwork materials, coatings (including paper coatings), and in other applications as white pigment and filler reducing density of material and internal stresses arising during formation of coatings or polymer materials. Process comprises at least three following stages: (A) preparing functional core copolymer, (B) preparing particles with core-shell morphology, and (C) ionization of functional groups of core copolymer. All process stages are carried out as a series of consecutive transformations in the same reactor without discharge of intermediate products. As monomer containing functional groups in stage A, vinylbenzyl chloride is used, and stage C represents amination of vinylbenzyl chloride units with tertiary aliphatic amines, pyridine, or derivatives of the latter.
EFFECT: improved and simplified technology and improved characteristics of cationic latex.
10 cl, 6 ex