Color indicator for completion of polymerization for thermosets
US6017983A · kind A · utility
6Cited by
4References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1998 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Jan 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2363/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An indicator for complete polymerization and cure of base-catalyzed epoxy thermoset resin systems is disclosed. In particular, the present invention makes use of an diazo dye having amino groups which forms a salt or complex with hardeners used in various epoxy resin systems. Upon full polymerization and consumption of the hardener, a chromophoric shift of the dye can be observed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.