Curable composition containing a difunctional epoxy resin, a polyfunctional epoxy resin, a difunctional phenol and a polyfunctional phenol
US5066735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Apr 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31529
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Electrical laminates are prepared from prepreg materials prepared by impregnating a substrate with a laminating varnish comprising a solvent solution of a curable composition comprising (A) a mixture of at least one epoxy resin having an average of more than 1 but not more than 2 vicinal epoxy groups per molecule and at least one epoxy resin having an average of more than 2 vicinal epoxy groups per molecules; (B) a mixture of at least one phenolic hydroxyl-containing compound having an average of more than 1 but not more than 2 phenolic hydroxyl groups per molecule and at least one phenolic hydroxyl-containing compound having an average of more than 2 phenolic hydroxyl groups per molecule; and (C) at least one catalyst for effecting the reaction between (A) and (B).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.