Acrylated or methacrylated urethane oligomer without isocyanate
US10221280B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2014 |
| Grant date | Mar 5, 2019 |
| Priority date | — |
| Expiry date | Apr 27, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D175/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a monofunctional or multifunctional acrylated or methacrylated urethane oligomer where said urethane bond is obtained without use of isocyanate and by the carbonate-amine reaction between a cyclic carbonate and a monoamine or polyamine, with subsequently the conversion of the hydroxyls in the β position with respect to the urethane bond into ester-acids by reaction with a cyclic anhydride, which reaction is followed by the conversion of said acid functional groups into acrylated or methacrylated end groups by reaction with a polyepoxide compound in the presence of acrylic or methacrylic acid.The invention also relates to a preparation process. Said oligomer is used as crosslinkable binder for a functionality of at least 2 in coating, molding, leaktightness agent or sealing compositions or, if monofunctional, as macromonomer in polymerizable compositions for the production of grafted polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.