The method of obtaining the thermo - and light-stabilized polycaproamide
(57) Abstract:Thermo - and light-resistant polycaproamide is produced by polymerization of caprolactam in the presence of 1,2,3-benzotriazole copper formula I in amounts of from 0.005 to 0.1% by weight of the monomer and inhibitor deposition of copper - gl26N2On or AS36N2About the number of a 0.012 to 0.1% by weight of monomer. The invention improves the heat and light resistance of the filaments of stable polycaproamide. table 2. The invention relates to the manufacture of polycaproamide fibres and can be used for stabilizing cord, chords and technical yarns.A method of obtaining thermo - and light-stabilized polycaproamide by the polymerization of caprolactam in the presence of the stabilizer - copper complex of ortho-phthalic acid with Ethylenediamine (ISS-21), taken in an amount of 0.005 - 0.5% by weight of the monomer and inhibitor deposition of copper iodide of potassium or magnesium chloride, taken in an amount of 0.05 - 0.1% by weight of monomer [SU 1525175].The disadvantage of this method is the low solubility of ISS-21 caprolactam, and as a consequence the impossibility of obtaining a polymer concentrate, and low temperature started is totalcost threads, and fatigue strength of filaments of stable polycaproamide.This object is achieved in that in the method for production of thermo - and light-stabilized polycaproamide by the polymerization of caprolactam in the presence of the stabilizer is an organic copper complex and the inhibitor deposition of copper as an organic copper complex using 1.2.3-benzotriazole copper formula
< / BR>in the amount of 0.005-0.1% by weight of monomer, and as an inhibitor deposition of copper using MgCl26H2O or AlCl36H2O in the amount of 0.012-0.1% by weight of monomer.Example 1. The way thermo-svetozarauladocy polycaproamide by the introduction of the stabilizer in the polymer before the polymerization.In this case, is not required prior complex, the latter is obtained in situ from prefabricated components - chloride of copper and 1,2,3-benzotriazole. To prevent release of elemental copper in the process of polymerization and degassing of polycaproamide is added magnesium chloride or aluminum chloride. In pot-stirrer to prepare the reaction mixture is loaded caprolactam melt with a temperature of 90oC, is added to the controller with many brand after which the mixture is stirred for 30 minutes. Then in 3 liters of distilled water, taken from the volume required as activator, dissolve CuCl22H2O in the amount of 0.01% by weight of caprolactam and MgCl26H2O or AlCl36H2O in the amount of 0.05% by weight of caprolactam. When this dosage is reached the concentration of the stabilizer 0.02%. The prepared solution is added to the reaction mixture, and then enter the remaining volume of water. The mixture is stirred for 30 minutes, and then subjected to polymerization, evacuation, then the process goes according to schedule. The result is a fiber linear density 1870 decitex strength 71 mn/dtex and elongation 14.5%. After soaking for 2 hours at 200oC strength is reduced to 92% of the initial elongation is reduced to 11.2%. After exposure to fluorescent lamp daytime running light (DTC-30) for 750 hours strength is reduced to 88% of the initial elongation is reduced to 12.0%. In the case of unstabilized fiber strength decreases with heat treatment to almost zero (thread "burns") and when the processing up to 11% of the original values.Example 2. The way thermo-svetozarauladocy polycaproamide using polymer concentrate is stable the ski characteristics of polycaproamide, it can be introduced into the polymer, including the pigment of the desired color to produce the polymer concentrate in an amount up to 1.0% by weight of the polymer. For example, a mixture of granules of PA-6 with a stabilizer in the amount of 1.0% by weight of the polyamide is processed on dvuhserijnom the extruder. The obtained granulate-concentrate with a relative viscosity of 2.4-2.6 is introduced into the polymer in the amount of 0.5-10.0% by weight of the polymer, which corresponds to the stabilizer content in the final product 0.005-0.1%. There is another way: in a pot-stirrer is loaded molten caprolactam, stabilizer, pigment and stirred for 1-3 h; then the mixture is transferred to depolymerization where it is mixed with a ratio of 1:1 (by volume) with water-oligomeric mass. After 5-8 h of polymerization at a temperature of 230-250oC is obtained polymer concentrate containing pigment to 15% and stabilizer to 1.0%. Viscosity, the content of the NMS, the melt flow index of the polymer concentrate with the addition of the stabilizer is virtually indistinguishable from the performance of the concentrate without stabilizer.Since the proposed stabilizer performs 2 functions: thermo - and sitosterolemia, these limits are dictated by the requirements of our needs for the proposed thermo-sitosterolemia are shown in table 1.Comparative test results stabilizers N-1 (spatial hindered amine-2,2(phenylmethoxy)diethyl ether), ISS-21 and 1,2,3-benzotriazole copper are shown in table 2. The method of obtaining thermo - and light-stabilized polycaproamide by the polymerization of caprolactam in the presence of the stabilizer is an organic copper complex and the inhibitor deposition of copper, wherein the organic copper complex using 1,2,3-benzotriazole copper II formula
< / BR>in the amount of from 0.005 to 0.1% by weight of monomer, and as an inhibitor deposition of copper MgCl26H2O or ll36H2O number 0,012 - 0,1% by weight of monomer.
FIELD: methods of production of electret items, electret filters and respirators.
SUBSTANCE: the invention presents a method of production of electret items, electret filters and respirators with heightened resistivity to the oil mist. The invention falls into production processes of electret items, electret packed beds and respirators, and may be used for removal of corpuscles from gases, especially for removal of aerosols from air. The method provides for: formation of a melted material consisting of a mixture of a polymer composed of a mixture of a polymer representing a non-current-conducting thermoplastic resin with a specific resistivity exceeding 1014 Ohms·cm with a fluorine compound as an additive compound; shaping it to the required form and quenching it up to the temperature lower than the melting point of the polymer. The material is calcined and treated with an electric charge to give it electret properties. The invention improves the capability of filtering oily aerosols.
EFFECT: the invention improves the capability of filtering oily aerosols.
19 cl, 16 tbl, 19 dwg, 23 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to technology of fabricating polyolefin fibers used for woven and nonwoven materials, in particular to imparting wettability to the latter, and can be used in manufacture of hygienic appliances, filters, accumulator battery separators, and the like. Elementary threads and two-component fibers are made from molten mixture of polyolefin and at least one compound of formula: R1-hydrophilic oligomer, wherein R1 denotes straight-chain or branched C22-C40-alkyl and hydrophilic oligomer is homo- or cooligomer comprising 2-10 monomer units derived from monomers selected from group including ethylene oxide, propylene oxide, ethylene glycol, propylene glycol, epichlorohydrin, acrylic acid, methacrylic acid, ethyleneimine, caprolactone, vinyl alcohol, and vinyl acetate.
EFFECT: achieved excellent prolonged wettability of fibers and textiles.
15 cl, 4 ex
FIELD: polymer materials and composites.
SUBSTANCE: composite granulate, consisting of cylindrical granules 1-2 mm in diameter and 3-4 mm in height possessing residual magnetization 0.4-0.5 mTl, contains: (i) high-pressure polyethylene or polypropylene; (ii) filler dispersed in granulate functioning as modifying additive and being represented by powdered magnetically hard strontium ferrite in concentration 5-25%; and dioctyl phthalate as plasticizing agent with residual magnetization 0.4-0.52 mTl (2%).
EFFECT: improved adsorption properties of filter materials based on fibers made from composite granulate of invention.
2 tbl, 2 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to manufacture of polymer materials and, in particular, micro- and nanofibers showing elevated strength and durability, which can be employed in a variety of technical fields, including their use in various filters. Composition of fine fiber having diameters between 0,001 and 2 μm contains addition or condensation polymer and aromatic-nature resinous additive with molecular weight 500 to 3000, which additive may be disposed on the surface of fiber. Preparation method comprises exposure of polymer solution to electric field to form accelerated solution strands. Subsequent vaporization of solvent provides formation of fine fiber. Fibers are collected on a substrate and subjected to heat treatment at temperature not superior to melting point of polymer. From thus obtained fiber, fine-fiber material is manufactured.
EFFECT: manufacture of high-durability and high-strength fibers.
31 cl, 21 dwg, 5 tbl, 18 ex
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to novel chemical compounds that can be used for protection of textile materials from biodamages, and to a method for their synthesis. Invention proposes antibacterial oligoethoxy-(4-organocarboxyphenyloxy)-tetrasiloxanes. These compounds are able to protect textile materials from biodamages and not to be washed off from surface of their fibers in multiple launderings and chemical cleansings. Invention proposes a method for synthesis of claimed oligoethoxy-(4-organocarboxyphenyloxy)-tetrasiloxanes by the condensation reaction of 1 g-mole of decaethoxytetrasiloxane with a desired amount of g-moles of the corresponding 4-organocarboxyphenol representing 4-hydroxybenzoic acid ester in the presence of catalytic amount of tetrachlorosilane at heating and stirring and with simultaneous distillation of formed ethyl alcohol.
EFFECT: improved method of synthesis.
3 cl, 1 dwg, 3 tbl, 7 ex
FIELD: process for producing of fully aromatic polyamide fibers comprising filler, in particular, aluminous mineral.
SUBSTANCE: fully aromatic polyamide fiber contains 100 weight parts of fully aromatic polyamide and from 0.05 to 20 weight parts of particles of aluminous mineral having laminated structure, such as hectorite, saponite, stevensite, beidellite, montmorillonite, and swelling mica.
EFFECT: improved mechanical properties of fibers, which may be provided with technological stability at fiber forming stage.
17 cl, 1 dwg, 3 tbl, 7 ex
SUBSTANCE: invention relates to using zinc sulfide in articles possessing N antibacterial and antifungal activity. In particular, it can be used in preparing any product able to interact with microorganisms and/or fungi, such as dress, carpets, curtains, bed affiliations and textile materials used for medicinal aims.
EFFECT: valuable properties of articles.
6 cl, 8 tbl, 7 ex
FIELD: chemistry of polymers, chemical technology.
SUBSTANCE: invention relates to technology for preparing chemical fibers, in particular, polypropylene threads and articles made of them, for example, unwoven materials for goods and hygiene articles. Proposed thermoplastic molding composition comprises the following components, wt.-%: polypropylene, 97.00-99.95, and carbon nanotubes as an additive, 0.05-3.0. Prepared polypropylene threats possess the improved hygienic properties.
EFFECT: improved and valuable properties of composition.
1 tbl, 8 ex
FIELD: technological processes.
SUBSTANCE: invention is related to technology of production of polycaproamide fibers and may be used in production of cord and technical threads for their stabilisation. Method of production of thermally-light-stabilised polycaproamide thread includes melting of polycaproamide granulated material and thread spinning. Prior to spinning via polymer concentrate multi-component thermal light stabiliser is introduced, which is taken in the following ratio: granulated material "ПА"-6 - 90-92%, multi-component thermal light-stabiliser - 8-10%. The latter consists of the following: - univalent copper salt 0.6-0.7%, potassium halogenide 2.4-5.6%), auxiliary additive: organic component from triazols class, plasticisers on the basis of stearates, phenol anti-oxidant 3.7-5%, optical bleach from class of benzoxazole 0-0.05%.
EFFECT: increase of thermal light resistance of cord and technical threads; preservation of strength properties after impregnation, thermal treatment and vulcanisation and reduction of elementary copper depositing on internal surfaces of technological equipment and draw die sets.
4 tbl, 3 ex
SUBSTANCE: fibre or a film with an ion exchanger is dipped into bactericidal active metal ions and/or ions of pharmaceutical active substances such that, a depot of these active substances is formed in the article.
EFFECT: when using such articles in aqueous solutions, they separate active substances in a period of time at the level corresponding to equilibrium concentration.
13 cl, 10 tbl, 10 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to polymer composition based on granulated polycaproamide, which contains polycaproamide, oligomers, water, titanium dioxide, and, additionally, complex modifying additive constituted by 1,1,5-trihydroperfluoripentanol and N,N-bis(2,2,6,6-yrytamethyl-4-piperidiniyl) 1,3-benzenedicarbamide.
EFFECT: increased engineering and thermal resistance of granulate, reduced appearance of low-molecular oligomer compounds during formation, and improved essential properties of thread such as thermal resistance and resistance against oxidative UV destruction.