CPC C09J 175/08 (2013.01) [C08G 18/10 (2013.01); C08G 18/3206 (2013.01); C08G 18/3885 (2013.01); C08G 18/4812 (2013.01); C08G 18/4825 (2013.01); C08G 18/4829 (2013.01); C08G 18/5084 (2013.01); C08G 18/6696 (2013.01); C08G 18/755 (2013.01); C08G 18/757 (2013.01); C08G 18/758 (2013.01); C08G 18/8054 (2013.01); B32B 7/12 (2013.01)] | 16 Claims |
1. A two-component solventless adhesive composition, comprising:
an isocyanate component comprising an isocyanate-terminated prepolymer; and
an isocyanate-reactive component comprising:
a hydroxy-terminated polyurethane resin which is a reaction product of a polyisocyanate and a polyol component;
a polyether polyol;
a phosphate ester adhesion promoter made from a tri-functional propylene glycol, a polyphosphoric acid, and a polyisocyanate; and
optionally, a bio-based polyol;
wherein the phosphate ester adhesion promoter has a phosphoric acid content of less than 4 weight percent based on the weight of the phosphate ester adhesion promoter; and
wherein the phosphate ester adhesion promoter accounts for 0.5 to 15 percent of the total weight of the isocyanate-reactive component.
|