Reaction product of phenol-aldehyde with polyamine(-epoxy adduct) and proton donor
US6420496B1 · kind B1 · utility
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6References
8Claims
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Key dates
| Filing date | Oct 8, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Oct 8, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A curing agent for epoxy resins is prepared by (1) reacting a phenol and an aldehyde in the presence of a basic catalyst to form a first reaction product, (2) reacting the first reaction product with a polyamine or a polyamine-epoxy adduct to form a second reaction product containing unreacted primary amine groups, and (3) reacting the second reaction product with a proton donor compound having a pKa value of 11 or less to form the curing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.