Phenol-formaldehyde resins containing reduced quantities of 2-functional components and epoxy novolac resins prepared therefrom
US4755543A · kind A · utility
7Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Feb 18, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Phenol-aldehyde novolac resins having reduced quantities of 2-functional material are prepared by removing all or part of the 2-functional material from this product resulting from reacting phenol with an aldehyde. Epoxy novolac resins prepared from the novolac resin containing less 2-functional product exhibit increased Tg values when cured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.