Hardenable composition with a particular combination of characteristics
US6638567B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A curable epoxy resin composition comprising(a) a cycloaliphatic epoxy resin that is liquid at RT and, suspended therein, a core/shell polymer,(b) a polycarboxylic anhydride and(c) fillers,wherein the composition is flame-retardant because two different fillers (c1) and (c2) are present, the nature of filler (c1) being such that, starting at RT, it is able to release water as the temperature rises, the total proportion of fillers (c1) and (c2) is from 58 to 73% by weight, based on the total amount of components (a), (b), (c1) and (c2), and the ratio by weight of the fillers (c1):(c2) is from 1:3 to 1:1, is suitable as a casting resin, especially in the impregnation of electrical coils and in the production of electrical components, such as air-cooled transformers, bushings, insulators, switches, sensors, converters and cable end seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.