Olefinic copolymer compositions

Abstract

A composition comprising 90 to 20 % by might of at least one diene rubber or butyl rubber and 10 to 80 % by weight of halogen-containing, sulfur-curable, normally amorphous quadripolymer produced by contacting a mixture of (1) ethylene, (2) an .alpha.-olefin having the formula, R--CH=CH.sub.2 , wherein R is a hydrocarbon radical having 1 to 20 carbon atoms, (3) a hydrocarbon compound having a plurality of non-conjugated unsaturated bonds capable of polymerizing with a coordinated catalyst, and (4) a halogenated norbornene compound represented by the formula, ##SPC1## Wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrogen atoms, hydrocarbon radicals having 1 to 20 carbon atoms, halogen atoms, or halogenated hydrocarbon radicals having 1 to 20 carbon atoms and containing at least one halogen atom as substituent, provided that R.sub.1, R.sub.2, R.sub.3 and R.sub.4 have as a whole at least one halogen atom, with a coordinated catalyst comprising an organoaluminum compound of the formula, AlR'.sub.n X.sub.3.sub.-n, wherein R' is a hydrocarbon radical having 1 to 20 carbon atoms, X is a halogen atom, and n is any number of from 1.5 to 3, and a transition metal compound selected from the group consisting of vanadium compounds and titanium compounds, the molar ratio of said organoaluminum compound to said transition metal compound being from 5 : 1 to 0.5 : 1. The rate of vulcanization of the said quadripolymer is freely controllable by varying the non-conjugated diene content thereof.

Dependencies are inferred from the claim text.