Primary-tertiary diamines mixed with polyamines as epoxy resin hardeners
US5688905A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Sep 20, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/5053
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An amine hardener composition for curing epoxy resin based coatings and related products comprising (A) from 5 to 75% of a diamine which possesses a vapor pressure less than about 133 Pascals at 20.degree. C., contains both a primary and a tertiary amine and corresponds to either of the structures: ##STR1## where R.sub.1 and R.sub.2 are independently C.sub.1 -C.sub.8 alkyl; X is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 --, or --CH.sub.2 --O--CH.sub.2 --; and n is 2-6, (B) from 5 to 95% of a polyamide, amidoamine, Mannich base or cycloaliphatic amine curing agent; and (C) from 0 to 50% of other active hydrogen containing dismines or polyamines. Coatings based on the composition can be formulated at up to 100% solids, and have an excellent combination of pot life and dry speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.