Propylene-base random copolymer particles and production...

Details Propylene-base random copolymer particles and production... Propylene-base random copolymer particles and production...

C - Chemistry, Metallurgy

08

J

402/601, 18/639,

C08J 3/12 (2006.01) C08J 3/00 (2006.01) C08J 9/18 (2006.01) C08J 9/20 (2006.01) C08L 23/16 (2006.01)

Patent

CA 1257744

Abstract PROPYLENE-BASE RANDOM COPOLYMER PARTICLES AND PRODUCTION PROCESS THEREOF Disclosed herein are propylene-base random copolymer particles suitable for use in the production of pre-foamed particles. The copolymer particles are obtained by heating starting copolymer particles to the crystallization temperature thereof and then quenching them in a medium of (the crystallization temperature - 30°C) or lower. Processes for obtaining the copolymer particles are also disclosed. Pre-foamed particles produced using the copolymer particles contain large cells. They can thus provide foamed moldings which are substantially free of shrinkage and have good flexibility.

493974

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