Acrylonitrile polymers stabilized against thermal...

Details Acrylonitrile polymers stabilized against thermal... Acrylonitrile polymers stabilized against thermal...

C - Chemistry, Metallurgy

08

L

400/9223

C08L 33/20 (2006.01) C08K 5/04 (2006.01) C08K 5/109 (2006.01)

Patent

CA 1076737

ABSTRACT OF THE DISCLOSURE The Specification describes polymer materials comprising (8) a homopolymer of acrylonitrile or a copolymer of acrylonitrile and at least one further copolymerisable monomer, the copolymer containing at least 20% by weight of units of acrylonitrile; and (b) a dialkyl pyrocarbonate in an amount sufficient to inhibit or prevent thermal discoloration. The anti- discoloration additive can be incorporated into a monomer composition from which the homopolymer or copolymer is formed or can be admixed with the formed polymer.

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