Compatible blends of chlorinated polyvinyl chloride resins...

C - Chemistry – Metallurgy – 08 – L

Patent

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400/6546

C08L 27/24 (2006.01) C08L 25/02 (2006.01) C08L 35/06 (2006.01)

Patent

CA 1167590

ABSTRACT A flame retardant blend of thermoplastic polymers comprises a blend of 1-99 percent by weight of a chlorinated polyvinyl chloride resin and 1-99 percent by weight of a copolymer of styrene and an ethylenically unsaturated dicarboxylic acid monomer, the blend having a heat distor- tion temperature in excess of 200°F., and a single glass transition property. Such blends which contain at least 40 percent by weight of said chlorinated polyvinyl chloride resin and an oxygen index of at least 0.25 also exhibit flame retardant properties.

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