Cure-indicating molding and coating composition
US5583178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1995 |
| Grant date | Dec 10, 1996 |
| Priority date | — |
| Expiry date | Jun 29, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/20
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides novel hydrosilation-curable compositions, the cure of which can be monitored visually, comprising: (1) an ethylenic compound; (2) a compound containing silicon-bonded-hydrogen groups; (3) a hydrosilation catalyst; and (4) one or more cure-indicating dyes with light absorption in the visible spectrum that exhibit a color change in the presence of a silicon-bonded-hydrogen compound and a precious metal hydrosilation catalyst. The cure-indicating dye provides the composition with an initial pre-cure color and a different post-cure color. As a result of this change in color, the state of cure of the composition can be visually monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.