Method of producing frictional polymer materials

FIELD: chemistry.

SUBSTANCE: method involves pretreatment of butadiene or butadiene nitrile rubber on plasticising equipment with further addition of vulcanising agents - sulphur, thiuram, 2-mercaptobenzothiazole, and then powdered filler, fibrous filler saturated with water-soluble epoxy resin, which is a product of the reaction of a mixture of diane and aliphatic resin with glycols or derivatives thereof. The ratio of the fibre to resin ranges from 95-5 to 60-40. A special additive of 1-5% emulsion of a liquid transition metal carbonyl in triethanolamine is then added. The material contains the following in pts.wt: rubber 100, sulphur 1-15, thiuram 0.04-0.2, 2-mercaptobenzothiazole 0.3-4.0, powdered filler 10-100, saturated fibrous filler 15-1000, metal carbonyl emulsion 0.5-10.0.

EFFECT: invention improves strength properties and wear resistance of frictional polymer materials, improves labour conditions when mixing components.

2 tbl, 7 ex

 

The invention relates to a method for producing a friction polymeric materials and can be used in the manufacture of brake pads in rail and road transport, cranes, clutches, as well as damping and vibration-absorbing materials and other purposes.

Known friction polymeric materials and the way they are received on the basis of butadiene rubber containing vulcanizing additives are sulfur, thiuram and other sulfur-containing compounds and include mineral powders, inorganic fibers and metal shavings (see encyclopedia of polymer. V.3. The edition of the Soviet encyclopedia, M.: 1977, str-788. Similar to 1).

The disadvantages of this method are the low strength properties of the material due to poor adhesion of rubber to fibers, dust from the fibers, particularly asbestos, hazardous to health personnel, and insufficient high frictional properties.

There is also described a method of improving the frictional properties of the friction properties of the product due to the preliminary destructive impact on reinforcing (mainly polymer) fiber (see patent RU 2.114.332 (13) C1 Analogue 2).

A destructive impact on fiber although somewhat improves the adhesion of the rubber to the surface, but it certainly leads to a decrease in bursting strength of the floor is dimensional fibers and to the destruction of fragile inorganic fibers, first of all glass. Therefore, this method can significantly increase the strength characteristics of the friction products.

A more efficient way to obtain friction polymer material described in the next prototype (see patent RU 2.175.335 C2 from 27.04.1999 year). It is the introduction in the process of softening of the rubber component epoxy - solid alloy epoxy resins with 4,4' - dioxideemissions and phenol-formaldehyde resin. The above method can improve the strength characteristics and durability of the brake mates.

The lack of material made in accordance with the nearest prototype is not sufficiently uniform distribution of the epoxy component on the boundary of the fiber-rubber and, as a consequence, incomplete implementation of the adhesion effect.

During operation of the friction materials containing sulphur, the latter diffuses into the surface of the pairing, and can result in negative segregation phenomena that cause degradation of the surface of the railway wheel.

The aim of the proposed method is a significant improvement in strength characteristics and durability of the friction polymeric materials, excluding education fibrous dust and improve working conditions in the process of mixing the components, as well as neutralizaci is formed during operation of sulfur.

This objective is achieved in that a method of obtaining a friction polymeric material is carried out by pre-treatment on plastification equipment butadiene or on BNR rubbers with the further introduction of vulcanizing additives, sulfur, turama, 2-mercaptobenzthiazole, then powder filler, fibrous filler impregnated water-soluble epoxy resin, which is a product of the interaction of the mixture Dianov and aliphatic resins with glycols or their derivatives, with a ratio of fiber to resin is from 95÷5 to 60÷40 and special additives 1-5% emulsion of liquid carbonyl transition metal triethanolamine, and the material contains in parts by weight:

Rubber100
Sulfur1÷15
Thiuram0,04÷2
2-Mercaptobenzthiazole0,3÷4
Powder filler10÷100
Impregnated fibrous filler15÷100
The emulsion of the metal carbonyl in triethanolamine 0,5÷10

Example 1

Preparation of water-soluble epoxy resin brand etal AK-732.

In the solution with heating and stirring, download 50 parts by weight of epoxy Dianova resin brand ED-20, 30 parts by weight of aliphatic epoxy resin brand TAG-1 (diglycidyl ether of triethylene glycol) and 20 parts by weight of diethylene glycol. The interaction of the components occurs as a result of their mixing at 30°C for 60 minutes After this product was added 100 parts by weight of distilled water and at 80°C and stirred for 40 minutes the resulting product is poured into the vessel and before using adjusted to the desired concentration.

The impregnated fiber

In a paddle mixer load 200 parts by weight of the dissolved epoxy resin constituting the triple product of the interaction of the mixture Dianov and aliphatic resins with glycols and their derivatives, brand AK-732 (TU 2241-824-18826195-06) with a dry matter content of 30%. Later in the mixer load 200 parts by weight of chopped glass fiber (TU 5952-061-05763895-2003) and stirred for 10 minutes. The mixture is discharged on a baking sheet and dried to a residual water content less than 0.5%.

Obtaining friction material

In the rubber mixer type RSVD 140-20 loaded 100 parts by weight of butadiene rubber stamps SKD-2 (GOST 14924), 8 parts by weight of sulfur, technical ground natural varieties 9995, 1 parts by weight of teorama (GOST 740), 2 MASC-mercaptobenzthiazole (GOST 739), 45 parts by weight of the powder filler consisting of a mixture of the alumina (GOST 30558), crystalline graphite (GOST 5279), crumb hard-shelled roasted (TU 5761-003-25310144-99), barite concentrate (GOST 4682) in equal proportion. Later in the rubber mixer load 60 parts by weight of fiberglass impregnated with water-soluble epoxy resin, in a ratio of fiberglass + resin 75÷25. Stirring is carried out at 80°C for 25 minutes, and then downloaded 5 parts by weight of liquid PENTACARBONYL iron in the form of a 2% emulsion in triethanolamine (TU 6-02-982-75).

Examples 2÷7 carried out analogously to example 1, but with the change of the composition in accordance with table 1.

Properties of the obtained friction material are shown in table 2.

The inventive method allows to significantly improve the strength characteristics of the resulting friction material (see table 2) and to neutralize mainly released during operation of the sulfur. Fibers impregnated with an aqueous solution of epoxy resin, in contrast to covered much better preserved in the process of mixing with the rubber. For example, glass fiber on rollers or rubber mixer collapses to the size of a length less than 0.5 mm and impregnated practically retains its original size, which is a major factor in increasing the reinforcing effect.

No less important is the elimination of p is neobrazovana when using an aqueous solution of epoxy resin.

Introduction to the composition of the material of epoxy resin significantly improves the adhesion of rubber to fiber and metal frame brake pads.

Table 2
The properties of the products obtained from the friction of polymeric materials according to examples 1÷7 in comparison with analogue and prototype
No.Name of indicatorValue
1234567Similar 1 encyclopedia of polymersThe prototype EN 2.175.335
1Flexural strength, MPa1009010598981001081565
2 The tensile strength, MPa768085888690923537
3The coefficient of friction according to GOST 107910,540,520,530,520,520,520,490,380,56
4Wear GOST 107910,070,060,060,070,060,070,060,110,05
5The content of free sulphur after 6 months of operation, % by weight of material<0,001<0,001<0,001<0,001<0,001<0,001 <0,001-0,2

The way to obtain friction polymeric materials, which consists in pre-treatment on plastification equipment butadiene or on BNR rubbers with the further introduction of vulcanizing additives, sulfur, turama, 2-mercaptobenzthiazole, then powder filler, fibrous filler impregnated water-soluble epoxy resin, which is a product of the interaction of the mixture Dianov and aliphatic resins with glycols or their derivatives, with a ratio of the fiber-resin from 95-5 to 60-40 and special additives 1-5% emulsion of liquid carbonyl transition metal triethanolamine, and the material contains, in parts by weight:

rubber100
sulfur1-15
thiuram0,04-2,0
2-mercaptobenzthiazole0,3-4,0
powder filler10-100
impregnated fibrous filler15-100
emulsi the carbonyl metal triethanolamine 0.5 to 10.0



 

Same patents:

FIELD: chemistry.

SUBSTANCE: rubber mixture based on butadiene-nitrile rubber BNKS-18 is prepared. 2-5 pts.wt synthetic magnesium nano-spinel with particle size less than 100 nm is added to 10 pts.wt powdered ultra-high molecular weight polyethylene per 100 pts.wt rubber and then mixed for 2-3 minutes in a blade mixer. The obtained composition is added to the rubber mixture on rollers or rubber mixer. The rubber mixture also contains natural rubber, sulphur, N,N-diphenylguanidine, di-(2-benzothiazolyl)-disulphide, zinc oxide, aldol-α-naphthylamine, N-(4-hydroxyphenyl)-naphthylamine-2, N-(1,3-dimethylbutyl)-N-phenylenediamine-1,4, technical carbon P803, stearic acid, dibutyl phthalate.

EFFECT: invention enables to obtain rubber with given level of operational properties with high and stable complex of operational characteristics.

2 tbl

FIELD: chemistry.

SUBSTANCE: sludge formed during lime treatment and coagulation crude water on the water treatment installation of thermal power plants, having chemical composition CaCO3+ MgO + Mg(OH)2 +SiO2 +Fe(OH)3 +Al(OH)3 is used as mineral filler for rubber based on vinylsiloxane, butadiene-nitrile synthetic rubber and butadiene-α-methylstyrene rubber in amount of up to 50% of the weight of the rubber.

EFFECT: invention widens the range of rubber filler materials, lowers the cost of rubber, and solves the problem of recycling thermal power plant wastes.

3 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing frictional polymer materials and can be used in making brake shoes of railway wagons and locomotives, for motor transport, cranes, clutch plates and other articles. The method is realised by processing butadiene or butadiene-nitrile rubber on plastification equipment and mixing the rubber with curing agents, with fibre and powdered filling materials. Aromatic polyamine is simultaneously added with curing additives. The aromatic polyamine is an aniline-formaldehyde condensate consisting of 75% isomers of diaminodiphenylmethane and 3-4 benzene-nuclear primary amines bound by methylene bridges. The fibre filler is pre-saturated for 15 minutes with aqueous solution of epoxy resin which is a product of reacting a mixture of diane and aliphatic epoxy resins with glycols or derivatives thereof, in ratio A:B between 95:5 and 60:40, and then dried to moisture not higher than 1%. The composition of the material contains the following in pts. wt: rubber 100, aromatic polyamine 2-20, sulphur 1-15, thiuram 0.04-2.0, 2-mercaptobenzothiazole 0.3-4.0, fibre filler 15-100, powdered filler 10-100.

EFFECT: invention improves strength characteristics of frictional polymer materials and increases labour safety.

2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: unsaturated polyketone which contains carbonyl groups and double carbon-carbon bonds is added to the rubber mixture. Unsaturated polyketone has average molecular weight of 19000-120000. Unsaturated polyketone is added to the rubber mixture in amount of 51-100 wt % of the total amount of high-molecular weight carbon-chain rubber and unsaturated polyketone in the mixture. Unsaturated polyketone is obtained through oxygenation of diene rubber with nitrogen monoxide. The rubber mixture is vulcanised.

EFFECT: method increases bonding strength between coating rubber and metal cord and fatigue strength of the rubber.

5 cl, 11 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of industrial rubber articles which are used in conditions with heavy mechanical loads, friction, aggressive media and severe climatic conditions and can be used to make sealing devices for flexible and fixed joints of the type of rings, cuffs and linings, as well as for making actuating devices for membrane converters of pressure changes into linear displacements and components of braking systems of railway vehicles. The polymer composition contains the following components in pts. wt: paraffin butadiene nitrile rubber 90-100, butadiene methylstyrene rubber 0-10, technical sulphur 0.5-1.5, tetramethylthiuram disulphide 1-2, N,N'-dithiodimorpholine 1.5-2.5, N-cyclohexyl-2-benzthiazolyl-sulphenamide 1.0-2.5; zinc oxide 4-8, phenyl-β-naphthylamine 0.5-2.5, technical carbon 100-150, dibutylphthalate 20-40, dibutyl sebacate 20-40 and stearic acid 0.5-2.5.

EFFECT: invention enables to obtain articles which can work in aggressive media at temperature as low as minus 60°C, are stable under periodic dynamic loads and have high operational reliability and a guaranteed long useful life.

6 cl, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: rubber composition contains the following in pts. wt: synthetic nitrile rubber SKN-26 or SKN-26 ASM 100, suphur 0.5-2.5; an acceleration group: thiuram D 0.5-2.5, N,N'-dithiomorpholine 2-4, vulcanisation activator: zinc oxide 1.5-5.0; filler: technical carbon P-514 15-30, technical carbon T 900 55-75, white soot BS-100 5-20, plasticiser: dibutyl sebacate 5-15, polyvinyl chloride EP-6602s 10-25, diaphene FP 1-3, stearic acid 0.5-2.5.

EFFECT: composition prolongs life of the ready article due to high restorability after compression.

2 tbl

FIELD: chemistry.

SUBSTANCE: rubber mix is prepared from butadiene-nitrile rubber BNKS-18 AMN with addition of powdered ultra-high-molecular-weight polyethylene (UHMWPE) in the following ratio of components, wt %: BNKS-18 AMN butadiene-nitrile rubber 40-46.3; SKMS-10 RKP rubber 19.0; stearine 0.54; zinc white BT-M 1.63; sulphur 0.54; diaphene FP 0.54; paraffin 0.54; dibutylphthalate 3.2; technical rubber P-701 25-31.3; UHMWPE 1.63; sulfenamide T 0.54; thiuram 0.54.

EFFECT: high oil and moisture resistance and frost resistance of cushion pads.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to rubber industry and a rubber mixture for tyres working in deflated state. The tyre which works in deflated state is made from a rubber mixture which contains a rubber component containing butadiene-styrene rubber which contains 5-60 wt % syndiotactic crystalline 1, 2-polybutadiene and natural rubber and/or polyisoprene rubber. The rubber mixture contains soot, sulphur or sulphur compounds. The rubber mixture preferably contains petroleum resin based on C5-hydrocarbons, having average molecular weight between 300 and 10000, which is obtained through polymerisation of petroleum hydrocarbons based on C5-hydrocarbons, in amount of 0.5-10 pts. wt per 100 pts. wt of the rubber component.

EFFECT: high wear resistance after perforation, longer distance of travel and speed.

3 cl, 13 ex, 1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining friction polymer materials and can be used in making brake shoes of railway wagons and locomotives, for motor transport, cranes, structural articles in machine building and other articles. The method of producing friction polymer materials involves processing butadiene or butadiene-nitrile rubber on plastification equipment with their subsequent mixture with a vulcanising agent in form of organic peroxides (A) in form of mixtures with powder (B) and solid phenol-formaldehyde resin (C) in ratio A:B:C ranging from 2:96:2 to 8:70:22. Further, a water-soluble epoxy component is added, which is a product of reacting diane resin with glycol and an aliphatic expoxy resin in form of impregnation of an aqueous solution of the resin on fibre filler with subsequent drying at resin content of 4-30% in terms of the dry product. Fine mineral or metal powder is used. The material contains the following in pts. wt: rubber - 100, vulcanising agent - 30-100, saturated fibre material - 20-120.

EFFECT: improved strength characteristics with simultaneous prevention of diffusion penetration of sulphur into the steel surface of touched article, as well as increased labour safety when mixing components on the plastification equipment - rolls, rubber mixers etc.

2 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in the rubber industry for making vulcanised butadiene-nitrile based rubber with high thermal-oxidative resistance. The polymer anti-ageing paste contains polyvinyl chloride, plasticiser, stearic acid, molten mass of anti-ageing agents containing N-isopropyl-N-phenyl-n-phenylenediamine, polymer of 2,2,4-trimethyl-1,2-dihydroquinoline ε-caprolactam.

EFFECT: reduced viscosity of the paste which simplifies its further processing on rubber mixing equipment, increased thermal-oxidative resistance of the rubber.

3 tbl

FIELD: wood industry.

SUBSTANCE: invention may be used to extract, recycle and process wood wastes in process of fibreboards production. The method includes supplying waste waters downstream pouring-forming machine into an accumulating-balancing reservoir, its pumping along a bypass pipeline into a disperser with simultaneous air supply from atmosphere into the bypass pipeline, formation of air and water mixture passing through the disperser, supply of air and water mixture into a dynamic absorber to create floating complexes, their supply into a receiving chamber of a flotation plant, separation into foam sent to the pouring-forming machine and treated water supplied to the accumulator. The system for method realisation comprises an accumulating-balancing reservoir for collection of waste waters, a bypass pipeline and a disperser to create air and water mixture, a dynamic absorber to form floating complexes, a floatation plant with a receiving chamber, a foam-producing mechanism and a foam-collecting pocket to separate caught fibre in the form of foam and an accumulator of treated water.

EFFECT: inventions ensure simple and cheap technology for extraction, recycling and processing of internal fibreboard production wastes with the possibility of secondary wood fibre catching and return directly into the process cycle without its additional treatment.

2 cl, 1 dwg, 2 tbl, 1 ex

FIELD: construction.

SUBSTANCE: method of rolled bitumen-containing material production includes impregnation of a base with a bituminous composition, prepared by melting and dehydration of the mixture of oil road viscous bitumen with oil construction or insulating bitumen, softening temperature of which is at least 70°C. The melt is cured at the temperature of 120-170°C for 4-8 hours. In process of the composition preparation its softening temperature is evaluated, results of which are used to correct the composition of by addition of one of the components, which provides the composition softening temperature corresponding to the range from 50°C to 71°C. At the same time the bituminous composition is characterised by the following ratio of components, wt %: oil road viscous bitumen - 5-88, oil construction or insulation bitumen - 9-80, plasticising oil - 1-28, such as industrial oil or flax polymerised oil. Also a rolled material is proposed.

EFFECT: finished self-adhesive rolled bitumen-containing material is characterised by improved physical and mechanical properties.

11 cl

FIELD: chemistry.

SUBSTANCE: rubber mixture is obtained by mixing 1-60 pts.wt low-molecular polymer based on conjugated dienes (B), having weight-average molecular weight measured using gel-penetrating chromatography per molecular weight of polystyrene from more than 30000 to not more than 200000, and content of vinyl bonds on the section of the diene compound with conjugated double bonds of not less than 40% per 100 pts.wt rubber component (A) which is mixed with (B). The rubber component (A) contains natural rubber and/or polyisoprene rubber and, if needed, at least one rubber selected from a group consisting of rubber based on a copolymer of butadiene and styrene, polybutadiene rubber and isobutylene isoprene rubber. The low-molecular polymer based on conjugated dienes (B) is obtained via anionic polymerisation, and the overall content of styrene links in the low-molecular polymer based on conjugated dienes (B) is less than 5 wt %.

EFFECT: disclosed composition has excellent processability during production and heat ageing resistance, high storage modulus and loss tangent.

10 cl, 6 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: rubber mixture is obtained by mixing 1-60 pts.wt low-molecular polymer based on conjugated dienes (B), having weight-average molecular weight measured using gel-penetrating chromatography per molecular weight of polystyrene from more than 30000 to not more than 200000, and content of vinyl bonds on the section of the diene compound with conjugated double bonds of not less than 40% per 100 pts.wt rubber component (A) which is mixed with (B). The rubber component (A) contains natural rubber and/or polyisoprene rubber and, if needed, at least one rubber selected from a group consisting of rubber based on a copolymer of butadiene and styrene, polybutadiene rubber and isobutylene isoprene rubber. The low-molecular polymer based on conjugated dienes (B) is obtained via anionic polymerisation, and the overall content of styrene links in the low-molecular polymer based on conjugated dienes (B) is less than 5 wt %.

EFFECT: disclosed composition has excellent processability during production and heat ageing resistance, high storage modulus and loss tangent.

10 cl, 6 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: rubber mixture for lateral rubber contains 35-55 pts.wt filler which contains at least soot with dibutylphthalate absorption coefficient not lower than 105 mg/100 g and nitrogen adsorption specific surface area of not less than 40 m2/g per 100 pts.wt rubber component consisting of at least two or more of natural rubber, synthetic polyisoprene rubber and another diene-based synthetic rubber. The rubber mixture additionally contains a curing agent and the amount of said soot in the mixture is between 15 and 55 pts.wt and tan δ at 25°C and total amount of filler in the mixture satisfies the following relationship (I): tan δ/total amount of filler in the mixture ≤ 0.0025 …(I).

EFFECT: disclosed rubber mixture has good processability and low hysteresis loss without deterioration of longevity of the side rubber and the pneumatic tyre has low rolling resistance.

4 cl, 3 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a rubber mixture based on oil-filled butadiene-α-methylstyrene rubber and can be used to make industrial rubber articles for different industries - oil refining, pipeline transport, railway transport, as well as household articles. The rubber mixture is prepared by mixing the following components in pts.wt: oil-filled butadiene-α-methylstyrene rubber - 100, sulphur - 2, dibenzthiazole disulphide -1.5, diphenylguanidine - 0.3, zinc oxide - 5, stearic acid - 2, technical carbon - 50 and 0.05-0.5 sodium alginate. Sodium alginate is pre-mixed with powdered ingredients in a powder mixer.

EFFECT: invention increases fatigue endurance of rubber during multiple stretching and reduces heat build-up at constant strain amplitude.

3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: rubber mixture for tyres contains (B): 5-50 pts.wt silicon dioxide per 100 pts.wt (A), containing (a): 10-60 wt % butadiene rubber containing 2.5-20 wt % 1,2-syndiotactic polybutadiene crystals, (b): 5-60 wt % modified diene rubber, (c): 20-75 wt % diene rubber different from (a) and (b), and sulphur. Content of vinyl in the modified butadiene rubber (b) is not higher than 35 wt %.

EFFECT: rubber mixture for tyres has low heat release and high crack resistance.

3 cl, 2 dwg, 2 tbl, 17 ex

FIELD: oil and gas production.

SUBSTANCE: procedure consists in heating raw stock to 440-450°C, in successive treatment of stock with air and in thermal cracking. Further light oil products and gaseous hydrocarbons are separated from produced bitumen. Before treatment of raw stock air is heated to temperature of stock. Flow rate of air amounts to 60-70 m3/t of stock; average time of raw stock treatment with air is 10-15 min. As raw stock there can be used oil tar; in this case it is processed at pressure 3-4 at, or black oil treated at pressure 6-10 at.

EFFECT: accelerated production of bitumen with simultaneous production of light oil products; considerably reduced dimensions of used equipment at comparable volumes of bitumen production.

3 cl, 4 ex

FIELD: construction.

SUBSTANCE: invention relates to a bitumen-rubber mastic, containing the following components: road bitumen BND 60/90, rubber crumbs and plasticising additive made of building lime and mineral powder, differing by the fact that additionally it contains a polymer additive from rubber thermoplastic elastomer RTEP at the following ratio of components, wt %: bitumen BND 60/90 - 68-78; rubber crumbs - 9-13; rubber thermoplastic elastomer RTEP 5-7; plasticising additive at the ratio of building lime - mineral powder making 3:7 8-12.

EFFECT: production of mastic with improved physical-chemical parameters, reduced brittleness temperature, increased elasticity and tensile strength.

1 ex, 3 tbl

FIELD: chemistry.

SUBSTANCE: rubber mixture based on butadiene-nitrile rubber BNKS-18 is prepared. 2-5 pts.wt synthetic magnesium nano-spinel with particle size less than 100 nm is added to 10 pts.wt powdered ultra-high molecular weight polyethylene per 100 pts.wt rubber and then mixed for 2-3 minutes in a blade mixer. The obtained composition is added to the rubber mixture on rollers or rubber mixer. The rubber mixture also contains natural rubber, sulphur, N,N-diphenylguanidine, di-(2-benzothiazolyl)-disulphide, zinc oxide, aldol-α-naphthylamine, N-(4-hydroxyphenyl)-naphthylamine-2, N-(1,3-dimethylbutyl)-N-phenylenediamine-1,4, technical carbon P803, stearic acid, dibutyl phthalate.

EFFECT: invention enables to obtain rubber with given level of operational properties with high and stable complex of operational characteristics.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used to fill articles for radio- and electrical purposes which work under high humidity and mechanical effects. The composition contains the following in pts.wt: epoxy diane resin ED-20 75-85, ethyl silicate-40 4.0-4.5, acetone 0.15-0.17, mixture of triglycidyl esters of polypropylene triol Laproxide703 and Laproxide 301 in ratio 4:1 53-61, ethylene diaminomethyl phenol AF-2 30-40, foam regulator Penta-483 1.5-1.7, catalyst K-1 type A 1.5-1.7, oligomethylhydride siloxane Penta-804 3.5-5.0.

EFFECT: composition has low water absorption, high mechanical strength and improved radio engineering properties under normal conditions and after exposure to high humidity.

2 tbl, 3 ex

Up!