Rubber toughened polyvinyl alcohol film compositions

Details Rubber toughened polyvinyl alcohol film compositions Rubber toughened polyvinyl alcohol film compositions

C - Chemistry, Metallurgy

08

L

400/1130, 220/12

C08L 29/04 (2006.01) C11D 17/04 (2006.01) C08L 21/00 (2006.01)

Patent

CA 1249688

Abstract Polymer compositions are provided which may be cast as thin, self-supporting films, useful in forming sealed envelopes or pouches containing granulated pulverulent or non-aqueous liquid materials. The cast films comprise a polymeric matrix, having at least about 50 weight percent polyvinyl alcohol, and a plurality of microdomains dispersed throughout the polymeric matrix. The films have good resistance to breakage at low temperatures and low relative humidities.

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