Patent ID: 6326438
Filing Date: 2001-12-04
Classification: B60C,C08K

Abstract:
A rubber compound having improved reversion resistance comprising:(a) a rubber selected from the group consisting of natural rubber, a rubber derived from a diene monomer and mixtures thereof,(b) from about 0.1 to about 10 phr of a bismaleimide compound of the general formula: ##STR6##wherein R is a divalent acyclic aliphatic group having from about 2 to 16 carbon atoms, cyclic aliphatic group having from about 5 to 20 carbon atoms, aromatic group having from about 6 to 18 carbon atoms, or alkylaromatic group having from about 7 to 24 carbon atoms, wherein these divalent groups may contain a hetero atom selected from O, N and S; X is 0 or an integer of from 1 to 3 and Y is hydrogen or --CH.sub.3 ; and(c) from about 0.1 phr to about 10 phr of a compound of the general formula: ##STR7##where R.sup.1 is selected from the group consisting of alkylene radicals having from 1 to 20 carbon atoms, cycloalkylene radicals having from 6 to 24 carbon atoms and arylene radicals having from 6 to 18 carbon atoms, alkarylene radicals having from 7 to 25 carbon atoms and divalent radicals of the formula:.paren open-st.R.sup.1.paren close-st.O.paren open-st.R.sup.1.paren close-st..