SU973562A1 - Vulcanized rubber stock - Google Patents

Description

The invention relates to the rubber industry and relates to the development of a rubber mixture based on chain-chain rubbers.

Known rubber compounds based on chain-chain rubbers include target additives and CA-hexachloro-m-xylene and pentachloro-o-xylene, o) -octachloro-4, 4-dimethyldiphenylmethane 1J as vulcanizing agents.

However, these compounds are inactive, and their use in mixtures. prevents the preparation of high strength vulcanizates.

A rubber compound based on chain-chain rubber, vulcanizable with sulfur or fenol-formaldehyde resin, and containing hexachloro-p-xylene (HCPC) 2j as an additive.

However, this mixture is prone to vulcanisation and does not allow to obtain vulcanizates with improved strength properties.

The purpose of the invention is to increase the strength of rubber and the resistance of mixtures to scorch.

The goal is achieved that the vulcanizable rubber mixture based on chain-chain rubber, including vulcanizing agents

contains as vulcanizing agents, oLjoi -bis (cyclopentadienyl) -2, 3, 5, 6-tetrachloro-p-xylene and magnesia in the following ratio, Research Institute of Components, May, including: Carbon chain rubber 100

C, (cyclopentadienyl) - 10 -2, 3, 5, 6-tetrachloro-p-xylene 3-6 magnesium oxide 3-10

The invention is illustrated by examples of a specific implementation (see Table 1). Mixtures 1-4 are vulcanized in x 50 min mode, mixtures 5 and 6 are in mode 150s x 30 min. The properties of rubber compounds and volcanics 20 are presented in Table. 2. From these data it can be seen that the experienced rubbers have higher rates of conditional tensile strength (25-28 MPa for 2-4 rubbers versus 25 20 MPa for control rubber 1 and 31 MPa for experienced rubber 6 as compared to 27 MPa for control rubber 5). In addition, experienced raw rubber compounds have better durability.

30 to scorch (Tu 35-40 min

experimental mixtures 2-4 versus 26 minutes at the control mixture, 1 and 30 minutes at

Composition, recipes, ma.ch.

experienced rubber mixture 6 versus 18 min in the control mixture 5).

Table 1

Butadiene-styrene rubber SKS-30

ARKM-15

Butadiene-nitrile rubber SKN-40

Carbon black

Properties of rubber mixtures and vulcanizates of BpeirUi munky vulcanization, T, at 120 ° C, min. Conventional tensile strength, MPa Relative elongation at break,% Residual elongation after rupture,% Aging coefficient 0.88 in strength at relative 0.51 elongation

Claims (1)

Vulcanizable rubber compound based on chain-chain rubber, including vulcanizing agents, so that, in order to increase the strength of rubbers and the stability of mixtures to vulcanisation. 100,100 100 100,100 Table 2 the mixture contains oL rcL -bis Sciclopentadienes 1 | -2, 3, 5, 6-tetrachloro-p-xylene and magnesia as the VU of the punctual agents oL rcL in the following ratio of components, wt.h .: Carbon chain rubber 100 50 18 25 27 500 -510 550 16 16 1 0.89 0.88 0.90 0.92 6 0.52 0.53 0.61 0.65 5973562 6 o1 "-bis (cyclo-1. Wloch GD, Organic Ectopentadienyl) -2, rubber vulcanization trackers, L ,, 3, 5, b-tetrachloro-chem, 1972, p. 133, 147-148. β-xylene β-b2. Schwartz A.G., Tokareva L.G., Magnesium oxide 3-10Pakhomova E.A. Vulcanizing agents Sources of information, cich rubber compounds. Rubber and reprints taken into account when expertise, 12, 1970, p. 3-4 (prototype) 5 for high temperature volcanic