PROBLEM TO BE SOLVED: To remove the limitation of work life and improve the initial bond strength, water resistance and heat resistance by blending glyoxal with a vinyl acetate resin-based emulsion of a specific composition.
SOLUTION: This adhesive has 0.05-10 pts.wt. of gloxyal based on 100 pts.wt. of the resin solid content of a vinyl acetate resin-based emulsion which contains an acetoacetylated polyvinyl alcohol (hereinafter referred to as AA-ed PVA). The acetoacetylated PVA preferably has 0.1-15 mol% of residual acetic acid groups, an average degree of polymerization of 500-2,600 and an acetoacetyl group content of 2-8 mol%. The amount of the acetoacetylated PVA used as a protective colloid is suitably 2-20 pts.wt. based on the resin solid content of the vinyl acetate resin-based emulsion. As the vinyl acetate resin-based emulsion, for example, polyvinyl acetate resin-based emulsions, ethylene-vinyl acetate copolymer emulsions, vinyl acetate-acrylate copolymer emulsions and the like can be used.
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