The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1987
Filed:
Dec. 30, 1985
Virgil Percec, Pepper Pike, OH (US);
The B. F. Goodrich Company, Akron, OH (US);
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 crosslinkable and has high reactivity, but has quite different characteristics.