| US 7,576,157 B2 | ||
| Aqueous dispersions of polyurethane compositions with ketone-hydrazide | ||
| Anthony D. Pajerski, Broadview Heights, Ohio (US) | ||
| Assigned to Lubrizol Advanced Materials, Inc., Cleveland, Ohio (US) | ||
| Filed on Jul. 27, 2007, as Appl. No. 11/829,390. | ||
| Claims priority of provisional application 60/820835, filed on Jul. 31, 2006. | ||
| Prior Publication US 2008/0027168 A1, Jan. 31, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C08G 18/06 (2006.01); C08G 18/08 (2006.01); C08F 283/04 (2006.01) | ||
| U.S. Cl. 524—589 [524/591; 525/453] | 20 Claims |
| 1. An aqueous dispersion of polyurethane comprising:
a) a urethane polymer or prepolymer,
b) a ketone functional molecule derived from reacting a C3-C20 ketone or aldehyde containing carboxylic acid with 1) an epoxidized
triglygeride or 2) an epoxidized polyester, said ketone functional molecule being characterized by having a number average
molecular weight from about 500 to about 20,000 Daltons and having at least one ketone or aldehyde functional moiety,
c) at least one molecule having at least one hydrazine moiety co-reactive with said ketone functional molecule, and
d) water.
|