Process for the manufacture of films and coatings containing...

Details Process for the manufacture of films and coatings containing... Process for the manufacture of films and coatings containing...

B - Operations, Transporting

05

D

18/1032, 117/199

B05D 1/00 (2006.01) C08F 8/12 (2006.01) C08F 16/06 (2006.01) C08L 29/04 (2006.01) C09D 129/04 (2006.01)

Patent

CA 1090943

Abstract of the Disclosure Polyvinyl alcohol containing films and coatings having a reduced water solubility are prepared from polyvinyl alcohol having an ester number of at most 200 mg of KOH/g. This polyvinyl alcohol being readily soluble in water is submitted in aqueous phase to an after saponification with alkali metal or alkaline earth metal hydroxide rendering it in- soluble at elevated temperature. The alkali or alkaline earth metal ions then are precipitated in the form of compounds difficultly soluble in water by additions of substances containing corresponding anions. The precipitate remains as inert filler in the suspension of polyvinyl alcohol thus prepared. The suspension is applied in form of films or coatings and dried.

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