Benzocyclobutene novolac resin compositions
US5349111A · kind A · utility
7Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Apr 23, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2602/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A novolac resin is prepared by reacting a phenolic compound, an aldehyde or a ketone, and a hydroxyl-substituted benzocyclobutene compound wherein the hydroxyl group is attached to an aromatic ring. The benzocyclobutenes are connected to the phenolic rings through an oxygen or oxyaryl bridge, or the cyclobutene is fused directly to a phenol ring. The novolac resin cures without evolution of volatiles and, when cured, provides a polymer which has a high glass transition temperature and which is essentially insoluble in organic solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.