Remoistenable adhesive compositions
AssigneeNational Starch and Chemical Corporation
InventorsDonald M. Wacome, Christopher T. Fazioli, Vincent A. Lauria
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Abstract
Remoistenable adhesive compositions are prepared from ethylene vinyl acetate resin latices which have been polymerized utilizing dextrin as the protective colloid. In a preferred embodiment of the invention, remoistenable adhesives characterized by superior adhesion to difficult stocks are prepared by post-addition of dextrin to the dextrin-emulsified ethylene vinyl acetate resin latex.
Claims7
Remoistenable adhesive compositions comprising:
- (a) 55-99.5% of an ethylene vinyl acetate resin latex having a T.sub.g of 15.degree. to -10.degree. C., the latex having been emulsified in an aqueous solution of dextrin;
- (b) 0.5-5% of a humectant;
- and
- (c) 0-40% dextrin.
In a method for the preparation of a remoistenable adhesive composition comprising ethylene vinyl acetate resin latices and humectants, the improvement which comprises prolymerizing the ethylene vinyl acetate in the presence of an aqueous solution of dextrin as a protective colloid.
In a method for the preparation of a remoistenable adhesive composition comprising ethylene vinyl acetate resin latices and humectants, the improvement which comprises polymerizing the ethylene vinyl acetate in the presence of an aqueous solution of dextrin as a protective colloid and post-adding up to 40% additional dextrin to the adhesive thereby providing an adhesive characterized by superior adhesion to difficult stocks.
Dependencies are inferred from the claim text.