Thermoplastic foam containing particulate additive

Details Thermoplastic foam containing particulate additive Thermoplastic foam containing particulate additive

C - Chemistry, Metallurgy

08

J

C08J 9/00 (2006.01) C08L 51/06 (2006.01)

Patent

CA 2473611

A cellular thermoplastic polyolefin foam comprising at least one particulate additive in admixture with a polymer matrix is disclosed, along with a process and foamable gel for manufacturing the same, wherein the polyolefin matrix comprises at least one polymer resin graft-modified with at least one polar group selected from the group consisting of acid, acid ester, and acid anhydride, and salts thereof. The invention facilitates the manufacture of macrocellular foams useful for acoustic absorption having increased amounts of particulate additives that provide certain desired properties difficult to achieve without the particulate additives, such as improved flame retardancy.

Cette invention se rapporte à une mousse de polyoléfine thermoplastique cellulaire comprenant au moins un additif particulaire mélangé à une matrice polymère, ainsi qu'à un procédé et à un gel moussant servant à la fabrication de cette mousse. Ladite matrice de polyoléfine contient au moins une résine polymère modifiée par greffe à l'aide d'au moins un groupe polaire choisi dans le groupe constitué par un acide, un ester acide et un anhydride acide, et des sels de ceux-ci. Cette invention facilite la fabrication de mousses macrocellulaires pour l'insonorisation ayant des quantités accrues additifs particulaires pour leur conférer certaines propriétés souhaitées difficiles à atteindre sans les additifs particulaires, telles que le pouvoir ignifuge.

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