SU897794A1 - Rubber mixture based on butadienenitrile rubber - Google Patents

Description

(54) RUBBER MIXTURE BASED ON BUTADIUM The invention is fire-resistant to the rubber industry and can be used to make flexible connectors, especially gao cuffs, and rubber-megaline bearings for pumps and propeller shafts operating in a particularly complex dynamic mode. causing a change of individual elements and the entire array of peairaoBoro products. Under these conditions, you use / you- (toj-C еооo) "B1-o- (СООВ where is the number of hydroxyl groups substituted by acrylic acid residues; t-1-2 is the polymerization coefficient of the olymphobic block; X -J, I , - residue of glycol or polyol; as in tetra- and polyfunctional lucizing agent. Oligoether acrylates of general formula t; 10) n - (yo-s; (111g) n Dosage of oligoether acrylate is 1O, O-6O, Oh math. on UO ma.ch. rubber. Such rubber mixtures have high strength, resistance to aging, in a relaxed state and impact of fuel oils. The disadvantage of these rubber compounds is that they do not satisfy

38977S44

requirements,

presented to rubber-nitrile rubber 2, containing + technical products m, working in the mode of re-shaping.

Known rubber compound based on

Nz - (ioo

enz

bNg c1 - COO

lightening as a vulcanizing agent oligoether acrylate

(UAE) forSNz

dH2-cioo-ci CIS

Sn

enz

с1Нг-СОО-с1 СН2

and the initiator of polymerization cLscL "is-tert-butyl peroxide megaparaisopropylbenzene, for example in the ratio, parts by weight: 100: 13: 2,9 2 .. Used OEA is called tetramethacrylate {bis-glycerol) phtalag (TMGF-I). This rubber mixture is highly resistant to aging in the stressed state at elevated temperatures and is used for the manufacture of rubber technical products operating in mobile and stationary wedge Jc in aggressive environments and in the environment of oils of petroleum origin at temperatures from -tO ° C to + 9 ° C. The disadvantage of this rubber compound is that it has low strength, modulus and hardness. In addition, it does not satisfy the currently increasing heat resistance requirements; stress state for parts operating under specified conditions. The disadvantage is that the TMGP-11 product contained therein is synthesized using the deficient city of pitserin used in the food industry. The purpose of the invention is to reduce the time of vulcanization of the mixture, increase the strength and stiffness of rubber from this mixture. The goal is achieved by the fact that a rubber mixture based on a butadiene nitrile caoutchouc, including a vulcanizing agent and a peroxide polymerization initiator, as a vulcanizing agent contains 2,3,4-trimethacrylate glucosane at a ratio of components, May., H: rubber 1OO; -2, 3.4 trimetacryle-glucosane 5-45, polymerization initiator 2.5-3.0 The specified vulcanizing agent has the formula I-° CJ-0- /; RZ - / O o 0-i H3C-C C-en.z jHg bNg On is an ether based on anhydrosaccharide compound of levoglucosane. The raw material for the production of this product is cheap levoglucosane, obtained from waste wood, logging and agricultural products. Rubber mixtures of these components may contain and. other target components: fillers (technical carbon), stabilizers I aromatic amine), dispersants (stearic acid, etc.). The compositions of the proposed rubber mixture, wt.h. in comparison with the known are presented in table. 1. The manufacture of mixtures is carried out on ordinary rubber production equipment. The mixtures are vulcanized at 17 ° C for 1O minutes. The conditions for the extrusion of the mixture and the properties of rubber from this mixture are presented in Table. 2. The test results are given in table. 2 show that rubber mixtures containing 2,3,4-trimethacrylate glucosane have increased strength by 25%, by 30% by a static compression modulus and by 2% of heat resistance.

kagyu in a stressful state, and the time of training up reain is reduced by 2 times compared with the known rubber mixture.

The use of 2,4,3-trimegakriplevoglucosan will provide a reduction in the consumption of the scarce food raw material - glyiperine.

Table I 7 Formula of the Invention A rubber compound based on butadiene nitrile rubber, comprising a vulcanizing agent and a peroxide polymerization initiator I, characterized in that, in order to shorten the vulcanization time of the mixture and improve the strength and hardness of the rubber from it, it keeps as a vulcanizing agent 2,3,4-trimethacryle glucosane with the following ratio of components, parts by weight .: Butadiene-nitrile rubber SO 8 48 2,3,4 -; - grimetacryle glugoeco 5-45 Polymerization initiator polymerization 2,5-3,0 Sources of information received In Niemann for the examination 1. Copyright svidetelsgvo USSR number 411 097, Cl. From 08 9 / OO. 1972. 2. A rubber compound based on divi-nitrile rubber. Technological regulations No. 51-40132. L., 1975 (prototype).

Claims (2)

Φ op mula of the invention A rubber mixture based on nitrile butadiene rubber, including a curing agent and a peroxide polymerization initiator 5, characterized in that, in order to reduce the vulcanization time of the mixture and increase the strength and stiffness of the rubber from it, the mixture contains, as the curing agent ^{, 0} and 2, 3,4-grimetacryllevoglucosan in the following ratio of components, parts by weight: Nitrile butadiene rubber 100 2,3,4-> trimethacry levoglucosan 5-45 Peroxide polymerization initiator 2.5-3.0