Low viscosity, ethylenically unsaturated polyurethanes containing allophanate groups
US5767220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1997 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Aug 25, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/671
- 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 total content of (meth)acryloyl groups (calculated as C=C, MW 24) of 1 to 20% 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) an isocyanurate group content (calculated as N.sub.3,C.sub.3,O.sub.3, MW 126) of up to 18% by weight, in which the allophanate and isocyanurate groups are prepared from aliphatic polyisocyanates. The present invention also relates to a one-component coating composition containing these ethylenically unsaturated polyurethanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.