FIELD: polymer materials.
SUBSTANCE: polymer composition suitable for use in various national economy branches, in particular in cable industry, is constituted by, weight parts: chloroprene rubber or its combination with butadiene-nitrile rubber, 100; zinc oxide as vulcanization agent, 1-5; vulcanization accelerator selected from group: sulfur, thiuram, diphenylguanidine, Captax, or a mixture thereof, 1.0-3.25; vulcanization activator selected from group: magnesium oxide and stearic acid, 3.5-10.0; stabilizer: acetonanyl, diaphene FP, naphtam-2, 2-3; dibutyl phthalate as plasticizer, 10-20; paraffin as antiozonant, 2-8; fillers: carbon black 47-52 and kaolin 5-22; polybutadiene as modifier, 0.1-10.0; and, additionally, alumina trihydrate, 50-60.
EFFECT: enabled preparation of composition showing resistance to flame propagation, low fume evolution, high frost and oil resistance with physico-mechanical characteristics preserved.
2 cl, 3 tbl
The invention relates to polymeric compositions that are used as protective shells cable products.
Known compositions based on synthetic rubbers, including as a filler in natural hydrates aluminosilicates: kaolin and bentonite (Koshelev FF and other General technology of rubber. Chemistry, 1978, pp.261).
However, such compositions have a high enough rate of vulcanization, thermal stability and mechanical properties.
Also known compositions in which to accelerate vulcanization and improvement of physico-mechanical characteristics are modified fillers (UK Patent No. 1265898, CLS 1A, epubl; application 59-109541, Japan, Appl. 15.12.82, No. 57-221052, epubl, MKI 08 L 11/00, 08 R 3/22).
However, these compositions do not possess the necessary resistance to spread of flame and have a high degree of smoke when burning.
Known composition with increased resistance on the basis of liquid chloroprene and silicone rubber containing as a filler alumina trihydrate. However, such compositions have insufficient resistance resistance to spread of flame and increased smoke emission during combustion (Application 57-209980, Japan, Saul, No. 56-95115, epubl. MCI 09 To 3/28, From 09 To 3/10).
Closest offer UEMOA composition and which we have adopted for the prototype is the composition, used for cable sheath, based on chloroprene rubber and includes a vulcanization accelerator, a vulcanization activator, thermo stabilizer, antiozonant, vulcanizing agent, a plasticizer, a product of dehydration of bentonite, polymethylsiloxanes liquid (AV. St-in 1048522, N 01 3/28, BI No. 38, 1983, SW VNIIKP).
The disadvantage of this composition is that it has low resistance to flame spread, high smoke emission and does not provide the required frost and oil resistance.
The task consisted in developing composition having improved resistance to flame propagation, low smoke emission, frost and oil resistance while maintaining high physical-mechanical properties.
To solve this problem developed composition based on chloroprene rubber (or its mixture with on BNR rubber containing vulcanizing agent, a vulcanization accelerator, a vulcanization activator, stabilizer, plasticizer, antiozonant, filler, alumina trihydrate and as a modifier of butadiene rubber in the following ratio of components, parts by weight of: rubber - 100; vulcanizing agent 1-5; vulcanization accelerator 1-3,25; a vulcanization activator 3,5-10,0; stabilizer 2-3,0; plasticizer 10-20; antiozonant 2-8; carbon 47-52; kaolin 5-22; rehydrate alumina 50-60; polybutadiene 0.1 to 10.
As use rubber chloroprene rubber (or its mixture with on BNR rubber in the ratio 1:1); as a vulcanizing agent, zinc oxide and accelerator of sulfur vulcanization, thiuram, diphenylguanidine, captax (2-mercaptobenzthiazole); as a vulcanization activator magnesium oxide, stearic acid; as a stabilizer deafen OP (N-isopropyl-N-phenyl-p-phenylenediamine), acetonyl N (polymer of 2,2,4-trimethyl-1,2-dihydroquinoline), naphthas-2(phenyl-β-naphtylamine); as the plasticizer dibutyl phthalate; as antiozonant paraffin.
The proposed composition allows to obtain a polymer coating for electrical cable having improved resistance to flame propagation, low smoke emission, frost and oil resistance while maintaining high physical-mechanical properties.
All components included in the composition, are known and are products produced by domestic or foreign industry. Manufacture and processing of the composition is carried out on standard equipment.
Composition composition is shown in table 1 were manufactured as follows.
On rollers resultatives rubber or mixture of rubbers), introduced polybutadiene, then enter the small sample with 50% of napolnitel and 50% of plasticizer, then enter 50% of plasticizer and 50% filler, at the end of the mixing enter the vulcanizing agent (zinc oxide) and roll the mixture for 1-2 minutes Total time of manufacture of the rubber on the rollers 12-14 minutes
The mode of manufacturing rubber samples for testing: 143°when the pressure in the press 100 psi for 40 minutes
Table 2 shows the physico-mechanical properties of the compositions, their frost - and oil resistance, oxygen index, the coefficient of the smoke.
Table 3 shows the results of tests for resistance to flame propagation in cables made with the shell of the proposed composition.
Tables 1, 2, 3 are listed after the text part of the description.
From the data presented in table 2, it is necessary that the developed composition according to the physical-mechanical properties is at the level of the prototype, and frost and oil resistance, oxygen index, the ratio dimostrazione significantly superior to the composition of the prototype.
Electric cable made of the proposed composition, has passed the test for resistance to flame spread in the beam by category Century trial of the electrical cable exposed to the flame was carried out according to IEC 60332-3-22. The spread of flame on a vertically placed bundles of cables. Category C
The tests were carried out according to the following procedure./p>
Test method cable on flame spread in the beam.
Trial electric cable exposed to the flame is carried out according to IEC 60332-3-22. The spread of flame on a vertically placed bundles of cables. Category C
The test sample consists of several segments of cable length of at least 3.5 m each, selected from one building length. The total number of cable sections in the sample must be such that the total nominal amount of non-metallic materials on the 1 meter sample was 3.5 liters
Sample disassemble and weigh each non-metallic material.
The number of segments in the sample to be tested is calculated by the formula
where V is the volume of non-metallic material, DM3;
Mi is the mass of each non-metallic material, kg;
ρIthe density of each material, kg/DM3;
l is the sample length, m
The calculated number of segments of the cable is fastened to the front side of the ladder one layer with a gap between adjacent segments, equal to half the diameter of the cable, but not more than 20 mm.
The maximum width of the sample for the standard of the stairs shall be 300 mm, and for the wide stairs - 600 mm
The flame is applied for 40 min, after which it must be extinguished.
The magnitude distribution of the flame take on the inu damaged parts. It is measured in meters (with precision up to the second decimal place) from the bottom edge of the burner until the end of charred parts defined as follows.
On the surface of the cable hit a sharp object such as a knife blade. The place is fixed, the change in the elastic surface of the sample on the fragile, consider the end of the charred parts.
For the category In the length of the charred part of the sample, measured from the bottom edge of the burner, should be no more than 2.5 meters
Thus, the developed polymer composition allows to obtain electrical cable with high rates of fire.
The spread of flame on a vertically positioned beam cable
|Indicators||Track||Norm IEC 60332-3-22||The placeholder|
|The length of the charred portion of the test beam cable, m||1,85||1,93||Not more than 2.5||More than 2.5|
1. Polymer composition comprising rubber, a vulcanizing agent is zinc oxide, a vulcanization accelerator, a vulcanization activator - magnesium oxide is stearic acid, stabilizer, a plasticizer is dibutyl phthalate, antiozonant - paraffin, the filler is carbon black and kaolin, modifier, characterized in that the composition contains as rubber, chloroprene rubber, or a combination of on BNR rubber, as an accelerator of vulcanization accelerator selected from the group of sulfur, thiuram, diphenylguanidine, captax or a combination thereof, as a stabilizer - acetonyl, deafen OP, naphthas-2 as a modifier - polybutadiene and additionally contains alumina trihydrate in the following ratio of components, parts by weight:
|The vulcanization accelerator||1,0-3,25|
|The vulcanization activator||3,5-10,0|
|Kaolin||a 5.0 to 22.0|
|The alumina trihydrate||50,0-60,0|
2. The composition according to claim 1, characterized in that the polychloroprene and on BNR KAU the arms taken in 1:1 ratio.
FIELD: preparation of compositions for cables filling.
SUBSTANCE: the invention is pertaining to preparation of compositions for filling the cables used in the field of a distant data transmission. Prepare a composition containing (in mass %): a mineral or a synthetic oil - 70-90, the hydrogenated block of styrene and butadiene copolymer with radial structure - 2-15, polyethylene wax - up to 12. The block of the copolymer can be synthesized using silicon tetrachloride or stannic chloride. The technical result of the invention consists in improvement of the index of compositions drops-protection and a stability augmentation.
EFFECT: the invention ensures improvement of the index of compositions drops-protection and a stability augmentation.
7 cl, 2 tbl, 3 ex
FIELD: polymer materials.
SUBSTANCE: friction material composition relates to the area of creating novel composites with polymer matrix. Composition is destined for use in oil-cooled arrangements of mobile machines and process equipment. Composition contains synthetic rubber, curing group, phenol-formaldehyde resin, layered silicate, polysulfone fiber, and dispersed fillers in the form of oxides and sulfates of metals selected from barium, zinc, titanium, copper, iron, magnesium, and calcium.
EFFECT: increased wear resistance and coefficient of friction of friction material in an oil medium, and stabilized coefficient of friction in transition processes.
FIELD: rubber industry.
SUBSTANCE: in particular, invention relates to rubber compound for manufacturing butadiene/nitrile rubber-based insertion-type rubber products for fuel and oil systems of motor transport. Rubber compound containing 30.00 wt parts of paraffinate butadiene/nitrile rubber and 0.30 wt parts of high-saturation hydrogenated (degree of hydrogenation 93-99%) butadiene/nitrile rubber having 18% of acrylonitrile additionally includes, wt parts: sulfur 0.30, magnesium oxide 2.00, zinc oxide 5.00, carbon black P-803 50.00, carbon black P-514 25.00, dibutyl sebacate 10.00, Peroxymon F-40 10.00, Diaphen FP 1.50, and acetoanyl R 1.00. Such composition of rubber compound provides effective oil, frost, and heat resistances to rubber and resistance thereof to ozone and thermal ageing, which makes it possible for hose-shaped rubber products to have long-term (up to 15 years) service durability.
EFFECT: improved consumer's property of rubber.
FIELD: rubber industry, medicine.
SUBSTANCE: invention proposes the composition for making medicinal technique articles comprises the following components, mas. p. p.: food butadiene-nitrile rubber, 100; polyvinyl chloride resin, 40.0-55.0; highly dispersed amorphous silica, 10.0-15.0; chalk, 40.0-60.0; dibutylphthalate, 35.0-40.0; zinc white, 1.0-1.5; stearic acid, 1.0-1.5; sulfur, 1.5-2.0; thiuram D, 0.35-0.4; thiazole 2MBT, 0.2-0.3 and diphenylguanidine, 0.2-0.3. The composition comprises additionally the following components that are thermodynamically incompatible with rubber, mas. p. p.: polymethylsiloxane liquid, 1.0-1.5; paraffin, 1.0-1.5, and technical carbon as a dye, 0.05-0.1. The composition provides preventing the release of components on the surface that effect pH value, turbidity change, oxidizing capacity and dry residue of the extract. Invention can be used in making articles of medicinal technique - rubber stoppers for sealing glass containers with infusion solutions, blood, blood substitutes and medicinal preparations for internal and external using prepared by industry and in pharmacy.
EFFECT: improved and valuable properties of composition.
4 tbl, 1 ex
FIELD: polymer materials.
SUBSTANCE: invention relates to olefin thermoplastic elastomers obtained by the method of "dynamic" vulcanization of ethylene-propylene-diene or butadiene-nitrile rubber jointly with polyolefins, which elastomers can be used in manufacture of technical rubber products as well as in fabrication of articles in automotive, cable, and shoe industries. Thermoplastic elastomer composition is made up of, wt %: isotactic polypropylene 20-40, synthetic rubber 44.9-73.2, organic peroxide 0.2-2.0, mineral oil 1-10. filler 0.4-5.0, melt flow-improving additive 0.5-1.0, 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid pentaerythrityl ester (Irganox 1010), propionic acid 3,3-thio-bis(dioctadecyl) ester (Irganox PS 802), and 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2,2-(3-(3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl)-1-oxopropyl) hydrazide (Irganox 1024). Composition contains low-density polyethylene with fluidity index between 7.0 and 100.0 g/10 min at 190°C and loading 2.16 kg as melt flow-improving additive. As cross-linking co-agent, composition may contain methacrylate or vinyl butyrate.
EFFECT: increased surface strength of molded products, improved abrasive resistance, and reduced scratch of products.
2 cl, 2 tbl, 18 ex
FIELD: rubber composition for production of cup-type seals.
SUBSTANCE: claimed butadiene-nitrile rubber composition contains (mass pts): powdered fluoroplastic as antiwear additive 10-18; sulfur 2.5; altax 2.7; zinc white 7.5; diphenylguanidine 0.25; aldol-α-naphthylamine 4.0; neozone D 1.0; furnace carbon black 120; dibutilsibacinate 20; santoflex IP 1.0; stearic acid 1.0.
EFFECT: cup-type seals with increased abrasive resistance, durability and reduced friction coefficient.
FIELD: rubber industry; methods of production of rubber mix on base of chloroprene rubber for preparation of cold-setting adghesives.
SUBSTANCE: chloroprene rubber of NYRIT KPHT grade is subjected to steam heating before mixing with zinc oxide and magnesium oxide; steam heating is continued for an hour at temperature of 100°C, after which mix is subjected to rolling till rubber sheet is formed. Then, diphenyl guanidine is introduced and mix is rolled, after which modifying agent is introduced; modifying agent is obtained preliminarily through interaction of epoxy diane resin and stillage waste of aniline process at mass ratio of 2:1 and content of aniline of 15-18 parts by mass. Rubber mix is used for making adhesive composition with the use of solvent and resin 101K. This adhesive composition enhanced quality of attachment of rubber to rubber and to metal.
EFFECT: utilization of petrochemical process waste - aniline.
4 tbl, 1 ex
FIELD: glues, rubber industry.
SUBSTANCE: invention relates to chloroprene rubber-base gluing composition. The gluing composition comprises polychloroprene rubber Nairit DP, butylphenolformaldehyde resin 101K, water, zinc oxide, magnesium oxide, organic solvent representing a mixture of ethyl acetate and nefras and comprises methacrylic acid glycide ester as a modifying agent and vat waste in aniline manufacturing with the content of aniline 15-18 mas. p. p. Proposed gluing composition provides the enhanced strength in gluing. Invention can be used in rubber industry in gluing vulcanized rubber.
EFFECT: improved and valuable technical properties of composition.
FIELD: gluing compositions.
SUBSTANCE: invention relates to chloroprene rubber-base gluing compositions and can be used in rubber industry in gluing vulcanized rubber. The gluing composition comprises polychloroprene rubber neoprene AS, butylphenolformaldehyde resin 101 K, water, zinc oxide, magnesium oxide and organic solvent representing a mixture of ethyl acetate and nefras. The composition comprises methacrylic acid glycide etser as a modifying agent and vat waste in manufacturing aniline with the aniline content 15-18 mas. p. p. The gluing composition provides enhanced gluing strength.
EFFECT: improved and valuable properties of composition.
FIELD: rubber industry, in particular chloroprene resin-based adhesive compositions.
SUBSTANCE: claimed composition contains nairitic adhesive, epoxy dianic resin and still waste from aniline production. Composition of present invention is useful in adhesion of vulcanized rubber surfaces or rubber and metal surfaces.
EFFECT: composition of improved adhesion strength.
3 tbl, 1 ex