Impact modification of polyimides

Details Impact modification of polyimides Impact modification of polyimides

C - Chemistry, Metallurgy

08

L

C08L 51/08 (2006.01) C08L 79/08 (2006.01)

Patent

CA 2056573

RD-20240 IMPACT MODIFICATION OF POLYIMIDES Abstract The impact resistance of polyimides is improved by the addition of impact modifiers comprising, as a first stage, an elastomeric polydiorganosiloxane optionally polymerized simultaneously with but separately from one or more vinyl monomers, and as at least one grafted subsequent stage a polymer or copolymer of acrylonitrile, methacrylonitrile, a vinyl aromatic compound, (meth)acrylic acid, alkyl (meth)acrylate or (meth)acrylamide monomer. The invention is useful in the extrusion of large parts, where the polyimide must be maintained at a high temperature for a prolonged period of time.

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