Method of protection from ozone deterioration for rubber
AssigneeSumitomo Chemical Company, Limited
InventorsShuichi Kanagawa, Shozo Tanimura, Seiji Sagawa
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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.
Claims8
A method for inhibiting ozone deterioration of rubber which comprises adding to the rubber an effective antiozonant amount of a nitrile of the formula ##STR16## wherein R'.sub.2 is alkyl of 6-18 carbon atoms.
A composition comprising rubber and a nitrile of the formula ##STR17## wherein R'.sub.2 is alkyl of 6-18 carbon atoms.
Dependencies are inferred from the claim text.