Flame retardant electrical laminate
US4990409A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1988 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jul 28, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31964
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A flame retardant electrical laminate prepared by impregnating a base material with a halogen-containing unsaturated polyester resin which is prepared by dissolving a halogen-containing unsaturated polyester into a polymerizable monomer; and then curing the halogen-containing unsaturated polyester resin; wherein the halogen-containing unsaturated polyester has a molecular weight per 1 mole of unsaturated group of 350 to 1,000, and the cured halogen-containing unsaturated polyester resin has a glass transition temperature of 30.degree. to 90.degree. C. Such electrical laminates not only have excellent flame redardancy but also excellent puching quality at wide temperature range including room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.