Hot and cold water redispersible polyvinyl acetate adhesives
AssigneeBorden, Inc.
InventorPeter S. Columbus
Life of this patent
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Abstract
This invention relates to polyvinyl acetate adhesives redispersible in hot and cold water in the dried film form.The adhesives comprise an emulsion of a polyvinyl acetate, an anti-coalescing polyvinylpyrrolidone and a non-volatile, water-soluble plasticizer for said anti-coalescing agent that is immiscible with the polyvinyl acetate resin, said plasticizer being present in amount to impart flexibility to the dried adhesive film and the ratio of polyvinyl acetate to anti-coalescing agent not exceeding about 8 parts by weight for each part by weight of agent.
Claims9
A polyvinyl acetate adhesive redispersible in hot and cold water when in dried film form, consisting essentially of an emulsion of a polyvinyl acetate;
- an anti-coalescing polyvinylpyrrolidone and a non-volatile, water-soluble plasticizer for said anti-coalescing agent that is immiscible with the polyvinyl acetate resin, said plasticizer being present in amount to impart flexibility to the dried adhesive film and the ratio of polyvinyl acetate to anti-coalescing agent not exceeding from about 8 parts by weight of acetate for each part by weight of polyvinylpyrrolidone.
A polyvinyl acetate adhesive redispersible in hot and cold water when in dried film form consisting essentially of an emulsion of a polyvinyl acetate;
- an anticoalescing polyvinylpyrrolidone which is not copolymerized with polyvinyl acetate;
- and a nonvolatile, water-soluble plasticizer for said anti-coalescing agent that is immiscible with the polyvinyl acetate resin;
- said plasticizer being present in amount to impart flexibility to the dried adhesive film and the ratio of polyvinyl acetate to anti-coalescing agent not exceeding from about 8 parts by weight of acetate for each part by weight of polyvinylpyrrolidone.
A polyvinyl acetate adhesive redispersible in hot and cold water when in dried film form consisting essentially of an aqueous emulsion of an unhydrolyzed polyvinyl acetate;
- and anti-coalescing polyvinylpyrrolidone agent which is not copolymerized with polyvinyl acetate;
- and a non-volatile, water-soluble plasticizer for said anti-coalescing agent that is immiscible with the polyvinyl acetate resin;
- the plasticizer being selected from the group consisting of glycerol, sorbitol, ethylene glycol, propylene glycol, diethylene glycols and mixtures thereof, said plasticizer being present in amount sufficient to impart flexibility to the dried adhesive film and the ratio of polyvinyl acetate to polyvinylpyrrolidone not exceeding from about 8 parts by weight of acetate for each part by weight of polyvinylpyrrolidone.
Dependencies are inferred from the claim text.