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US 5,672,653 AGranted
Anionic waterborne polyurethane dispersions
AssigneeElf Atochem North America, Inc.
InventorsKurt C. Frisch, Bhikhubhai P. Suthar, Han X. Xiao
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Abstract
Anionic waterborne polyurethane dispersions made using hydroxyl terminated polybutadiene resins and use of the dispersions to make films and adhesives.
Claims9
An anionic waterborne polyurethane dispersion prepared by a process comprising the following steps:
- (A) forming a prepolymer consisting essentially of a hydroxyl terminated polybutadiene resin, an aliphatic isocyanate, and a diol containing acid groups;
- (B) neutralizing the prepolymer of step (A);
- (C) adding water to form a prepolymer dispersion of the neutralized prepolymer;
- and
- (D) chain extending said prepolymer dispersion with a diamine.
2 more elements
Dependencies are inferred from the claim text.