Method of protection from ozone deterioration for rubber

Details Method of protection from ozone deterioration for rubber Method of protection from ozone deterioration for rubber

1975-11-05

1977-10-04

Hoke, V.P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08K 517

Patent

active

040523632

ABSTRACT:
Rubbers are prevented from ozone deterioration without discoloring or staining by the addition of a nitrile of the formula, ##STR1## wherein R.sub.1 and R.sub.2 are each hydrogen, C.sub.1 - C.sub.24 aliphatic, C.sub.5 - C.sub.7 alicyclic or aryl, or R.sub.1 and R.sub.2 may form together with the adjacent nitrogen atom a heterocyclic group which may further contain oxygen, and R.sub.3 and R.sub.4 are each hydrogen or lower alkyl.

REFERENCES:
patent: 2930777 (1960-03-01), Leeper et al.
patent: 3008921 (1961-11-01), Kline
patent: 3413259 (1968-11-01), Blumel
ASTM Special Technical Publication No. 229, Symposium on Effect of Ozone on Rubber.

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