Soft compounds derived from polypropylene grafted disubstituted ethylene- maleimide copolymers

A composition comprising the reaction product of a polyalkylene-grafted copolymer and a sufficient amount of an extender so as to form a gel, said polyalkylene-grafted copolymer being formed by reacting, under substantially dry conditions,

• 1) from about 50 to about 99 weight percent of a copolymer of a maleimide and an olefin having the formula R1R2C═CH2 wherein R1 and R2 independently are unsubstituted or substituted C1-C20 alkyl groups,
• 2) from about 1 to about 50 weight percent of a maleated polyalkylene, and
• 3) from about 0.1 to about 10 weight percent of a diamine,
• said composition optionally further comprising, per 100 parts by weight of said polyalkylene-grafted copolymer, from 1 to 350 parts of an inorganic filler, additive, or compounding ingredient.