Cyanato-group-containing phenol resin
US4022755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1975 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Jul 21, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L61/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel cyanato-group-containing phenol resin is produced by reacting a cyanogen halide in an inert organic solvent in the presence of a base with a phenol novolak comprising a mixture of polymers represented by the formula, ##STR1## WHEREIN, N IS 0 OR AN INTEGER OF 1 OR MORE; AND R's may be the same or different, and each R represents a hydrogen atom or a methyl group, and containing 50 % by weight or more in total of polymers having the above formula in which n is an integer of 1 to 3, the number average molecular weight of said novolak being at least 300 and less then 600. This phenol resin is suitable for use in the production of a cured resin having outstanding thermal properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.