Rigid polyurethanes based on allophanate-modified aliphatic and/or cycloaliphatic polyisocyanurates
US5614605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1994 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Dec 19, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/792
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to rigid polyurethanes prepared by reaction, at an isocyanate index of 95 to 110, of PA1 (a) an allophanate-modified aliphatic and/or cycloaliphatic polyisocyanurate; PA1 (b) 20 to 100% by weight, relative to the total of components (b) and (c), of PA2 (i) one or more polyether and/or polyester polyols containing three or more isocyanate-reactive hydroxyl groups and having a molecular weight of 200 to 6000, and PA2 (ii) 0 to 30% by weight, relative to component (b)(i), of one or more isocyanate-reactive compounds other than a polyether or polyester of component (b)(i) and containing two or more isocyanate-reactive hydroxyl groups and having a molecular weight of about 400 to about 10,000, PA1 (c) 0 to 30% by weight, relative to the total of components (b) and (c), of a chain extender and/or crosslinker other than a polyether or polyester and having a molecular weight of from 32 to 399, wherein the amounts of components (b) and (c) total 100% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.