Polyurethane adhesive of epoxy resin, polyisocyanate, phosphorus oxy acid, and carboxylic acid
First Claim
1. A polyurethane adhesive composition having improved storage stability which comprises an organic polyisocyanate, a polyol from about 0.01% by weight of an oxy acid of phosphorus or a derivative thereof, from about 0.01-20% by weight carboxylic acid or an anhydride thereof and from about 0.1-50% by weight of an epoxy resin, all percentages based on the weight of the whole composition, wherein the ratio of the number of NCO groups of the organic polyisocyanate to the number of active hydrogen groups of the polyol, oxy acid of phosphorus or a derivative thereof and epoxy resin (NCO/H) is about 1.2-20:
- 1 for a one-can adhesive or 0.4-10;
1 for a two-can adhesive.
1 Assignment
0 Petitions
Accused Products
Abstract
A polyurethane adhesive composition containing an oxy acid of phosphorus or a derivative thereof, a carboxylic acid or an anhydride thereof and an epoxy resin can serve as an adhesive for manufacturing food packaging materials, for instance, giving bonds having very good bond strength, heat resistance and hot water resistance between a metal foil and a plastic film.
32 Citations
8 Claims
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1. A polyurethane adhesive composition having improved storage stability which comprises an organic polyisocyanate, a polyol from about 0.01% by weight of an oxy acid of phosphorus or a derivative thereof, from about 0.01-20% by weight carboxylic acid or an anhydride thereof and from about 0.1-50% by weight of an epoxy resin, all percentages based on the weight of the whole composition, wherein the ratio of the number of NCO groups of the organic polyisocyanate to the number of active hydrogen groups of the polyol, oxy acid of phosphorus or a derivative thereof and epoxy resin (NCO/H) is about 1.2-20:
- 1 for a one-can adhesive or 0.4-10;
1 for a two-can adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 1 for a one-can adhesive or 0.4-10;
Specification