SU503892A1 - Rubber compound - Google Patents

Description

one

The invention relates to rubber mixtures based on synthetic rubbers.

One of the main requirements for rubber products is their satisfactory frost resistance, 5 For this purpose, a plasticizer is introduced into the composition of rubber compounds.

Known rubber mixture containing ethylene-propylene rubber and, as a plasticizer, alkyl benzene, obtained

alkylation of benzene with propylene tetramers.

This alkynbenzene contains 20% dialkyl-substituted with the number of carbon atoms in the alkyl and x and x are equal to l 24..15

Such a product is not compatible with the p-: rubber rubbers and its use is limited to non-polar polymers,

To | eome addition, the use of alklbenzo. and in 20, the force of branching of its structure does not allow obtaining the required cold resistance of rubber.

The aim of the shadow shade is to increase the frost resistance of rubber.25

This is achieved by using a monosubstituted alkylbenzene with (ALB) side chain of normal structure containing 10-13 carbon atoms as a plasticizer for the rubber compound. This alkyl benzene obtained by alkylation of benzene with olefics (paraffins are used as raw materials for the production of 5C-opefins). Alkylir (vanke, produced at a temperature of 30 ° C and atmospheric pressure using AtCL as a catalyst. The product obtained is characterized by the following properties:

Molecular weight

230-250

Density at 2O С

0.86 O Viscosity of kinematics with

Z.Osst

at 100 ° C

1.2 eats Anilinova POCHKR10-16 Limits of boil down

280-340 ° C GOST 2174-66

Plast-fixer in the rubber mixture is contained in the dosage of 5-60 weight, h. on 3. OOves.ch ;, rubber. In the example 4 "| eicomechanical properties of rubber compounds based on rubber nairite rubber and ett-leprogtolenovy SPEP. Example 1. Rubber mixture on the x axis; oroprenokhakh rubber (airnta B is prepared according to the following recipe, parts by weight. Nairit B1OO Stearic1 Magnesium oxide 7 Soot TL -1540 Pl1stfiksdtor Oksi-ts.ois Table 2. Example 2. Rubber mixtures on the HOBR of the double ethylene-propylene rubber VPCR grade A are prepared according to the following recipe, weight.: type EPD A1OO Zinc oxide 5 Soot. , 20 Vulk1 ipization is performed at 150 ° C for 40 min. of the above dlpnih cm tpbl. 3) prodllgg emyP plasticizer (ALU) has a greater plasticizing effect than the branched chain alkyl benzene. ALB significantly increases the frost resistance of rubbers based on ethylene-propylene rubber while maintaining relatively high strength properties of rubbers. In addition, the introduction of ALB reduces the viscosity of wet fin mixtures and increases the elasticity of vulcanizates. The use of ALB makes it possible to obtain rubber mixtures of new polar rubbers that are characterized by frost resistance, somewhat superior frost resistance of rubber mixtures with dibutyl sebacate (two) and at the same time high strength properties. The data characterizing the dependence of the glass transition temperature of plasticized polychloroprene (a factor determining the cold resistance of rubber) on the dosages of the plasticizer are given in Table ... 1, Thus, plastic ALB is a universal effective plasticizer that can be used to plasticize rubber mixtures as a base. rnny and nilol rykh rubbers.

Glass transition temperature of polychlo-soda plastroprene, plasticized fixative, parts by weight

Table 1.

503892

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 pm u lann 3 about the breach of rubber. D as a plasticizer she

Rubber compound, containing synthetic-contains Mons: ame valuable .. oh, pkilbenaol with

com rubber, plasticizer and other lateral chain of normal structure, with additive for additives, characterized by living 1 O-13 carbon atoms in quantity, which, in order to increase frost-resistance, 5–5 weight 5-60 weight, h