Monofunctional or multifunctional urethane acrylate oligomers without isocyanates
US11396491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2015 |
| Grant date | Jul 26, 2022 |
| Priority date | — |
| Expiry date | Nov 28, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2190/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An acrylated and/or methacrylated urethane oligomer obtained by reaction of a specific polyamine with a cyclic carbonate compound carrying m cyclic carbonate groups, giving an intermediate product carrying m formed urethane groups which carry residual reactive amine —NH— groups, and subsequently an addition reaction of each of the residual reactive amine groups of the intermediate product with an acrylate group of a compound carrying, in addition to the acrylate group, p additional acrylate and/or methacrylate groups, with each residual reactive amine —NH— group of the intermediate product being thus converted into a carbon-nitrogen bond carrying the acrylate and/or methacrylate groups, and thus production of the urethane oligomer, with the urethane oligomer carrying m urethane groups and m hydroxyl groups and having a functionality in acrylates and/or methacrylates ranging from m*p(n−1) to m*p(2n−2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.