Patent ID: 7608661
Filing Date: 2009-10-27
Classification: C09D,D21H

Abstract:
1. A water-soluble film useful for coating the surface of paper wherein said film is prepared from a coating composition having an aqueous phase, said aqueous phase comprising a copolymer comprising units of vinyl alcohol, alkyl acrylate, itaconic acid and optionally vinyl acetate, said copolymer comprising i) less than about 5 mol % vinyl acetate units; (ii) about 1 mol % to about 10 mol % itaconic acid units; (iii) at least about 90 mol % vinyl alcohol units and (iv) about 1 mol % to about 9 mol % alkyl acrylate units, wherein said copolymer is completely dissolved in said aqueous phase of the coating composition and the amount of water present in said aqueous phase is such that the concentration of water in the coating composition is less than 40% by weight, based on the total weight of the coating composition.