Impact modified poly(vinyl chloride) exhibiting improved...

C - Chemistry – Metallurgy – 08 – L

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C08L 27/06 (2006.01) C08J 3/20 (2006.01) C08L 51/00 (2006.01)

Patent

CA 2224923

Poly(vinyl chloride), when impact modified with a core/shell acrylic impact modifier whose shell is predominantly formed from 50 - 90 parts of polymerized units of methyl methacrylate and 10 - 50 parts of polymeric units of a C2- C8 alkyl acrylate and whose core is a crosslinked copolymer mainly of polymeric units of butyl acrylate, exhibits improved fusion behavior, allowing conversion to an intimate, fused, processable blend at lower temperatures and faster rates, than when the shell of the impact modifier is substantially formed from methyl methacrylate alone.

Poly¢chlorure de vinyle!, modifié par impact à l'aide d'un modificateur par impact de l'âme et de l'enveloppe acrylique, dont l'enveloppe est formée principalement de 50 - 90 parties d'unités polymérisées de méthacrylate de méthyle et de 10 - 50 parties d'unités polymériques d'un acrylate d'alkyle en C2- C8 et dont l'âme est un copolymère réticulé composé surtout d'unités polymériques d'acrylate de butyle, qui présente des caractéristiques améliorées de fusion, de façon à assurer la conversion du produit en un mélange intime, pouvant être fondu et traité à plus basse température et plus rapidement que lorsque l'enveloppe du modificateur par impact est principalement formée de méthacrylate de méthyle seulement.

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