Polyarylene polyethers with pendant vinyl and ethynyl groups and process for preparation thereof
US4806601A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Dec 31, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/23
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the synthesis of polyarylene polyether (PAPE) oligomers with pendant vinyl groups is presented. Aromatic polyether sulfone (APS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) backbones are used for specific examples. Terminal vinyl groups may also be provided on the APS by forming the .alpha., .omega.-di(benzyl)APS before the first step of a synthesis to form a pendant groups which step involves the chloromethylation of APS and PPO to provide oligomers with chloromethyl groups. PPO containing bromomethyl groups was obtained by radical bromination of the PPO methyl groups. Both chloromethylated and bromomethylated starting materials are converted to their phosphonium salts, and then subjected to a phase transfer catalyzed Wittig reaction to provide the pendant vinyl groups. An APS containing pendant ethynyl groups is prepared by bromination of the APS with pendant vinyl groups, followed by a phase transfer catalyzed dehydrobromination. Differential scanning calorimetry analysis of the thermal curing of the oligomers containing pendant vinyl groups, and, ethynyl groups, showed that the curing reaction is much faster for the former. The resulting network polymers were …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.