Difunctional isocyanate-terminated polyoxyalkylene diamine prepolymers and polymer coatings applications
US4761465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1987 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Jul 27, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/8038
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Diisocyanate and polyoxyalkylene diamine reaction products which contain as the principle reaction component, a diamine having the formula: ##STR1## wherein R' independently represents hydrogen or methyl and x is a number having an average value of at least 1 to about 60 and a diisocyanate of the formula: ##STR2## The products of the invention are obtained by reacting a polyoxyalkylene diamine with an excess of diisocyanate in the presence of a polar solvent to obtain products with the following general structures: ##STR3## where B is alkyl group from diisocyanates. These products and the corresponding blocked isocyanate prepolymer are further used to prepare coatings by reaction with polyoxyalkylene polyamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.