Curing system and coatings obtained thereof
US8597734B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 11, 2008 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Oct 28, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D163/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A peroxide-free curing system comprising 20-89.5% by weight of a compound having at least one epoxide group, 0.5-30% by weight of a polyamine, and 10-50% by weight of a co-curing agent is presented. The co-curing agent has formula (I):and/or its tautomeric formulae IIa and/or IIb:and/or formula (III):or a tautomer and/or an oligomer thereof; wherein D stands for branched (CR1R2)n orwherein p is independently 0 or 1, and X is CH2, O, or SO2 andstands for a meta- or para-benzene group; R is independently H or C1-C4 alkyl; R1 and R2 are independently H or (CH2)mCH3; wherein at least one group R2 is (CH2)mCH3 and m being 0 to 2; n being 1 to 10; and n+m is 4 to 14; R′—CH2 is R; and P stands for phenyl, or unsubstituted or hydroxy-substituted C1-6 alkyl or C2-6 alkenyl; with the proviso that at least one of R is C1-4 alkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.