Extrudable polyvinyl alcohol compositions

Details Extrudable polyvinyl alcohol compositions Extrudable polyvinyl alcohol compositions

C - Chemistry, Metallurgy

08

F

402/503, 18/768,

C08F 16/06 (2006.01) B29B 9/02 (2006.01) C08L 29/04 (2006.01)

Patent

CA 2024038

A method for extruding polyvinyl alcohol which comprises adding sufficient energy to the polyvinyl alcohol to both melt it and essentially eliminate the crystallinity in the melt, and simultaneously removing energy from the melt at a rate sufficient to avoid decomposition of the polyvinyl alcohol. Rapidly cooling the extruded melt reduces the heat history and improves the resulting color of the extrudable polyvinyl alcohol.

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