Low viscosity ethylenically unsaturated polyurethanes containing allophanate groups
US5951911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jan 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to ethylenically unsaturated polyurethanes which are substantially free from isocyanate groups and have PA1 a) a content of .beta.,.gamma.-ethylenically unsaturated ether groups (calculated as C.dbd.C, MW 24) incorporated through allophanate groups of 0.5 to 10% by weight, PA1 b) an allophanate group content (calculated as N.sub.2 C.sub.2 HO.sub.3, MW 101) of 1 to 20% by weight and PA1 c) a total content of ethylenically unsaturated groups of (calculated as C.dbd.C, MW 24) of 1 to 15% by weight. The present invention also relates to ethylenically unsaturated polyisocyanates which contain allophanate groups and have PA1 i) an NCO content of 5 to 25% by weight, PA1 ii) a content of .beta.,.gamma.-ethylenically unsaturated ether groups (calculated as C.dbd.C, MW 24) incorporated through allophanate groups of 0.5 to 15% by weight and PA1 iii) an allophanate group content (calculated as N.sub.2 C.sub.2 HO.sub.3, MW 101) of 1 to 30%. Finally, the present invention relates to one-component coating compositions containing the ethylenically unsaturated polyurethanes according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.