Polyisocyanate blends with improved compatibility with coreactants
US4788262A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1986 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/901
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to polyisocyanates which have improved compatibility with polyester coreactants and improved solubility in apolar solvents, the polyisocyanates containing, based on solids, PA0 (a) about 15 to 85 wt. % of an isocyanurate group-containing polyisocyanate based on hexamethylene diisocynate and PA0 (b) about 15 to 85 wt. % of a biuret group-containing polyisocyanate based on hexamethylene diisocyanate. The present invention is additionally directed to two-component polyurethane coating compositions based on the above polyisocyanates and branched polyester polyols. Finally, the present invention is directed to a process for preparing the polyisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.