Process for producing internally plasticized phenolic resins
US4209429A · kind A · utility
4Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Aug 28, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/0326
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Internally plasticized phenolic resins suitable for use in preparing laminates and the like excellent in electrical properties, heat resistance, solvent resistance as well as punchability are produced by reacting a phenol-formaldehyde resin containing less than 4% by weight of unreacted free monohydric phenol or phenols with an epoxidized vegetable oil, and if required with formaldehyde, with heating preferably in the presence of one or more secondary and/or tertiary amines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.