RF curable Type I wood adhesive composition comprising vinyl acetate/NMA copolymer emulsions containing tetramethylol glycoluril
AssigneeAir Products and Chemicals, Inc.
InventorsJohn G. Iacoveillo, David W. Horwat
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Abstract
An aqueous vinyl acetate/N-methylolacrylate copolymer emulsion for RF curable Type I wood adhesive compositions prepared by the polymerization of vinyl acetate and N-methylolacrylamide in the presence of 1 to 5 wt% tetramethylol glycoluril and a stabilizing system consisting essentially of 3 to 5 wt% polyvinyl alcohol, the weight percentages being based upon vinyl acetate monomer.
Claims20
In an aqueous vinyl acetate/N-methylolacrylamide copolymer emulsion for RF curable Type I wood adhesive compositions, the improvement which comprises a copolymer emulsion prepared by the aqueous emulsion polymerization of the vinyl acetate and N-methylolacrylamide in the presence of 1 to 5 wt % tetramethylol glycoluril and a stabilizing system consisting essentially of 3 to 5 wt % polyvinyl alcohol, wt % based upon vinyl acetate monomer.
An aqueous vinyl acetate/N-methylolacrylamide copolymer emulsion for RF curable Type I wood adhesive compositions prepared by the aqueous emulsion polymerization of sufficient vinyl acetate and N-methylolacrylamide to yield a copolymer containing 90 to 98 wt % vinyl acetate and 2 to 10 wt % N-methylolacrylamide, the emulsion polymerization being performed in the presence of 1 to 5 wt % tetramethylol glycoluril and a stabilizing system consisting essentially of 3 to 5 wt % polyvinyl alcohol which is 70 to 91 mole % hydrolyzed and has a DPn of 150 to 2000, wt % based upon vinyl acetate monomer.
An aqueous vinyl acetate/N-methylolacrylamide copolymer emulsion for RF curable Type I wood adhesive compositions prepared by the aqueous emulsion polymerization of sufficient vinyl acetate and N-methylolacrylamide to yield a copolymer containing 92 to 98 wt % vinyl acetate and 2 to 8 wt % N-methylolacrylamide, the emulsion polymerization being performed in the presence of 1 to 3 wt % tetramethylol glycoluril and a stabilizing system consisting essentially of 3 to 5 wt % polyvinyl alcohol which is 85 to 89 mole % hydrolyzed and has a DPn of 150 to 2000, wt % based upon vinyl acetate monomer.
Dependencies are inferred from the claim text.