Nitrile rubber composition having high modulus

Details Nitrile rubber composition having high modulus Nitrile rubber composition having high modulus

1981-03-13

1982-06-01

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525301, C08F26508

Patent

active

043329187

ABSTRACT:
A method of preparing a nitrile rubber composition having modulus and excellent physical properties and abrasion resistance is disclosed. This composition is prepared by kneading at 120.degree.-160.degree. C. (a) a nitrile rubber, (b) an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, (c) a divalent metal compound, (d) a secondary aryl amine, cooling the kneaded mass below 100.degree. C., adding to the kneaded mass (e) an organic peroxide, and heating and curing the resulting mixture at 110.degree.-180.degree. C. The addition of the secondary aryl amine considerably improves the physical properties of the composition. These compositions have not a tendency of scorching and are superior in the workability as compared with conventional carboxylated nitrile rubber compositions produced by emulsion polymerization.

REFERENCES:
patent: 2724707 (1955-11-01), Brown
patent: 3403136 (1968-09-01), Baker
patent: 3607981 (1971-09-01), Morris

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