SU1237681A1 - Rubber mix - Google Patents

Description

.112376812

The invention relates to rubber mass 2740; the content of nitroso groups of industrial activity, namely, to rubber 10 wt.%. mixtures based on isoprene rubber SKI-3, and can be used

garlic products used in ar-i ressive media.

The purpose of the invention is to increase the resistance to heat aging and those Example. Rubber compounds, the composition of which is given in Table 1, the manufacturer of tires and rubber and rubber technology by mixing components in a laboratory rubber mixer for 8 minutes, followed by treatment on rollers for 5 minutes.

Vultcanization of the mixtures is carried out after being subjected to aggression in the press for 15 minutes. of vulcanized media. The properties of the vulcanizates are given

, in table 2, in which for comparison

This rubber mixture as a quality is given the properties of the vulcanizer from the polymer modifier contains a well-known rubber mixture, including the product of the interaction of industrial 5 Shchi as a modifier 1 wt.h. low molecular weight r-noro-divinyl-piperylene-modifier - product of interacting rubber with n-troresorcin (SKDPN-NR). This product has the following characteristics: molecular

N-cyclohexyl-2-benzthiazolylsulfenamide

Zinc oxide

Stearin

Technical carbon PM-ZO

RU-1

ARE-1-4

Nitrosodiphenylamine

Aerosil

Rubrax

Cyc- (2-benzthiazolyl) di-sulfide

SKDPN-NR

VIA of low molecular weight divinyl piperylene rubber with 4-nitrosophenol.

Heat aging coefficient (, 72 h):

strength at

stretching 0.88 0.99

by relative

lengthening 0.72 0.85

Heat resistance coefficient at 100 С:

strength at

stretching 0.75 0.97 0.86 0.89 0.7A 0.83

by relative

an elongation of 0.88 1.00 1.21 1.12 0.87 0.91

After extraction with sea water for 20 days.

Coefficient:

on strength at. .

0.82 1.03 0.97 1.05 1.00

by relative extension

0.99 0.91 1.16 1.00 1.00

Thermal aging coefficient (,

72 h):

strength at

0.88 0.91 0.86 0.95 0.65 0.84

relative elongation 0.82 0.79 0.89 0.76 0.52 0.73

table 2

0.88 0.80 0.79

0.88 0.71 0.66

0.82 0.75 0.75 0.71

0.65 0.88

0.86 0.96

0.77 0.87

0.76 0.66

Properties

.

0.98 0.82 0.89 0.73

1.06 1.13 1.13 0.89

extraction with acidified water for 20 days.

.

Editor M. Bandura Order 3259/30

Compiled by, Balgin

Tehred O. Sopko Proofreader And, Erdeyi

Circulation 470 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Continued table. 2

0.82 1.0

0.64 0.86

Claims (1)

RUBBER MIXTURE, including isoprene rubber, sulfur, N-cyclo- -hexyl-2-benzthiazolylsulfenamide, zinc oxide, stearin, furnace carbon black, a complex of resorcinol with hexamethylenetetramine. or an alkylresorcinol formaldehyde resin with an epoxy content of 3 to 6 wt.% and a modifier based on divinylpiperylene rubber, characterized in that aging and heat resistance after exposure to aggressive environments of the vulcanizate, the mixture contains as a modifier the product · the interaction of low molecular weight divinylpiperylene rubber with nitroresorcinol and optionally contains N-nitrosodiphenylamine, aerosil, rubrax and di- (2benzothiazolyl) disulfide in the following ratio of components, parts by weight: Isoprene rubber Sulfur N-cyclohexyl-2benzothiazolylsulfenamide Zinc oxide Stearin Technical carbon furnace Resorcinol complex 3-6 wt.% N-nitrosodiphenylamine Aerosil Rubrax Di- (2-benzthiazolyl) disulfide The product of the interaction of low molecular weight divinyl — piperylene rubber with nitroresorcinol