Adhesives comprising polyvinyl alcohol bearing or mixed with substances bearing carboxyl groups, and a stabilizer

Claim 1

A SHELF-STABLE ADHESIVE COMPOSITION CAPABLE OF FORMING AN ADHERING WATER RESISTANT FILM, COMPRISING A UNIFORMLY DISPERSED SOLUTION, IN WATER, OF (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) DERIVATIVES OF POLYVINYL ALCOHOL BEARING CARBOXYL GROUPS AND (B) A MIXTURE OF POLYVINYL ALCOHOL AND HIGH MOLECULAR WEIGHT SUBSTANCES BEARING CARBOXYL GROUPS; AND (B) A SUSPENSION STABLIZING AMOUNT OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF BENTONITE, CLAY, METAL OXIDES AND METAL HYDROXIDES; THE SAID DERIVATIVES OF POLYVINYL ALCOHOL BEARING CARBOXYL GROUPS (A) BEING SELECTED FROM THE GROUP CONSISTING OF SAPONIFIED PRODUCTS OF VINYL ACETATE-ACRYLATE COPOLYMERS, SAPONIFIED PRODUCTS OF VINYL ACETATE-METHACRYLATE COPOLYMERS, SAPONIFIED PRODUCTS OF VINYL ACETATEACRYLIC AMIDE COPOLYMERS, SAPONIFIED PRODUCTS OF VINYL ACETATE-ACRYLONITRILE COPOLYMERS, POLYVINYL ALCOHOL ETHERIFIED BY GLYCOLIC ACID AND POLYVINYL ALCOHOL ACETALIZED BY GLYOXYLIC ACID; THE SAID MIXTURE OF POLYVINYL ALCOHOL AND HIGH MOLECULAR WEIGHT SUBSTANCES BEARING CARBOXYL GROUPS (B) BEING A MIXTURE OF POLYVINYL ALCOHOL AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYACRYLIC ACID, SAPONIFIED PRODUCTS OF POLYACRYLIC AMIDE AND SAPONIFIED PRODUCTS OF POLYACRYLONITRILE; AND THE METAL IN THE METAL OXIDES AND METAL HYDROXIDES BEING SELECTED FROM THE GROUP CONSISTING OF CALCIUM, MAGNESIUM, ZINC, LEAD, COPPER, ALUMINUM AND IRON; WITH THE PROVISO THAT THE CARBOXYL GROUP CONTENT OF BOTH OF THE ABOVE (A) AND (B) COMPONENTS IS IN THE RANGE OF BETWEEN 5 MOL PERCENT AND 70 MOL PERCENT.