Process for grafting maleic anhydride onto unsaturated polyolefinic elastomers by mass reaction
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United States of America Patent
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Oct 6, 1992
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N/A
app pub date -
Aug 1, 1989
filing date -
Aug 2, 1988
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Expired
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Abstract
Maleic anhydride is grafted onto unsaturated elastomeric terpolymers consisting of monomeric units coming from at least two different monomers having the formula R--CH.dbd.CH.sub.2 (R=hydrogen or an alkyl group containing from 1 to 6 carbon atoms) and from a conjugated or non-conjugated dienic monomer by mass reaction, which is carried out by heating at 120.degree.-350.degree. C. a mixture of said maleic anhydride with the terpolymer in the presence of a catalyst consisting of a compound having the formula: M.sub.n X.sub.z wherein: M=a metal of group VIII of the periodic system, and in particular Rh and Ru; X=a counterion, N=valence of the counterion; and Z=valence of the metal.
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