Processes for preparing thermoplastic elastomers

Details Processes for preparing thermoplastic elastomers Processes for preparing thermoplastic elastomers

C - Chemistry, Metallurgy

08

J

400/2020

C08J 3/24 (2006.01) C08F 299/00 (2006.01)

Patent

CA 2015302

Abstract Proposed herein is a process for preparing thermoplas- tic elastomers, which comprises bringing polymer particles, each composed of a portion comprising a crystalline olefin polymer and portions comprising an amorphous olefin polymer, in contact with a crosslinking agent optionally in the presence of a crosslinking auxiliary and/or a mineral oil softening agent a temperature below the higher one of the melting point of the crystalline olefin polymer and the glass transition temperature of the amorphous olefin polymer to obtain a thermoplastic elastomer crosslinked within the particles. Also proposed herein is a process for preparing thermoplastic elastomers, which comprises bringing polymer particles, each composed of a portion comprising a crystalline olefin polymer and portions comprising an amorphous olefin polymer, in contact with a radical initiator and a graft modifier optionally in the presence of a crosslinking agent, a crosslinking auxiliary, a swelling solvent and/or a mineral oil softening agent at a temperature below the higher one of the melting point of the crystalline olefin polymer and the glass transition temperature of the amorphous olefin polymer to obtain a thermoplastic elastomer graft modified and crosslinked within the particles.

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