SU681073A1 - Rubber blend based on unsaturated rubber - Google Patents

Description

one

The invention relates to the rubber industry, in particular to the development of a rubber mixture of unsaturated rubber, for the production of rubber products.

A rubber mixture based on unsaturated rubber is known, including toluene diisocyanate blocked by caprolactgm, vulcanization accelerator, carbon black, zinc oxide, sulfur and stearin in a ratio of, for example, 100: 5: 0.7: 40: 7: 2.2: 3: 1.

However, rubber from this mixture have low rigidity and insufficient fatigue properties.

The purpose of the invention is to increase the stiffness and fatigue properties of the rubber of this mixture.

This is achieved by the fact that a rubber mixture based on unsaturated rubber, including toluene diisocyanate, carbon black, zinc oxide, sulfur, stearin, blocked with 6-caprolactam, contains sulfenamide as a vulcanization accelerator and additionally para-nitrosodiphenylamine in the following ratio of components, by weight:

Unsaturated rubber100 Blocked with caprolactam toluene diisocyanate 3-15 Sulfenamide, 0.4-1.6 Soot 35-45 Zinc oxide 3-10 Sulfur 1, 5-3 Stearin 2-4

0 Para-nitrosodiphenylamine 0.3-1 Invention illustrations are examples.

Rubber compounds are prepared for the compositions shown in Table 1. The properties of the vulcanizates are presented in table 2.

As can be seen from table 2, the adhesion of the rubber mixture of the proposed sotsgsha

0 applied to industry; polyamide cord by 35% exceeds the adhesion of rubber from a known mixture, while the vulcanizates are characterized by a high level of stiffness, elastic hysteresis and fatigue properties, while the mixtures possess satisfactory technological properties.

Table 1

100.0 100.0100.0 SKI-3 -2, 12.1 Sulfur2.1 0.90.9 Sulfenamide Z0.9 0.20.2 Lltax 0.27.07 Zinc oxide 7.0 3.03, 0 Stearin technical 3,0 p-Nitrosodiphenyl, 50.5 amy and (JFA) Blocked with a mixture of isomers with caprolactam 2, 4 TDI + 2.6 TDI in the ratio of 65:35 (product TC) 5.0 30.0 30.0 Technical carbon PM-50 30.0 Technical carbon PM-100 Technical carbon DG-100 15.0 15.0 15.0 Blocked 2-mercaptobenethiazole mixture of isomers 2.4 TDI + + 2.6 TDI (known mixture) - 5.0 0.0100 , 0100.0 50.0 100.0 --- 50.0 2.12.12.0 2.2 2.2 0.90.90.90.9 0.20.20.20 0.3 0, 5 7,07,07,0 7,0 7,0 3,03,03,0 3,0 3,0 0,51,01,0 0,5 0,0 15,015,05,0,0 30,030,030,030, 0 - - .15.0-15.0 5.0 15.0-15.0 (О

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Claims (1)

W X 9 Claim of the invention Rubber compound based on non-essential rubber, including E-caprolactam blocked toluene diisocyanate, accelerator of vulkvieieatsii, bend, zinc oxide, sulfur, stearin, which are used to increase the rigidity and ustastochnyh properties of rubber from this mixture, later. as an accelerator, sulfenamide and additional paraMitrozodiphenylamine with a ratio of components, parts by weight; Unsaturated rubber F-caprolactam blocked toluene diisocyanate3-15 Sulfenamidi, 4-1.6 Soot35-45 Zinc oxide 3-10 Sulfur1.5-3 Stearin2-4 Para-nitrosodiphenylamine0, 3-1. Sources of information taken into account in the examination 1. Production of tires, rubber and asbestos products, 1974, № 5, p. 15-16.