Crosslinkable difunctionalized poly(phenylene oxide) and process for preparation thereof
US4665137A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1985 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Dec 30, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/48
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process is disclosed for converting .alpha.,.omega.-bis(2,6-dimethylphenol)poly(2,6-dimethyl-1,4-phenylene oxide) ("PPO--2OH" for brevity), and the corresponding thiophenol-poly(phenylene sulfide) ("PPS--2SH"), by the oxidative copolymerization of 2,6-dimethylphenol (DMP) with 2,2'-di)4-hydroxy-3,5-dimethylphenyl propane ("TMBPA"), or, of 2,6-dimethylthiophenol (DMTP) with 2,2-di(4-thiol-3,5-dimethylthiophenyl propane ("TMBTPA") respectively. Specifically, a mixture of water-methanol or chlorobenzene-methanol is used as the medium in which the reaction of DMP with TMBPA is carried out. By using a particular range of ratios of DMP to TMBPA and different solvent mixtures, the molecular weight of the PPO--2OH is tailored to be in the range from about 1000 to about 5000. The PPO--2OH is then difunctionalized at its chain ends, so that in the first instance, there is provided a reactive double bond (for example, a vinylbenzyl group) at each end of the PPO--2OH; and, in the second instance, a triple bond (benzylethynyl group) at each end of the PPO--2OH. The thermal polymerization of the PPO--2VB has exceptionally desirable characteristics. The corresponding PPS--2VB is also crosslinka…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.