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:
Feb. 25, 1992
Filed:
May. 12, 1989
Virgil Percec, Pepper Pike, OH (US);
The B. F. Goodrich Company, Akron, OH (US);
Abstract
Oligomers of polyarylene polyethethers (PAPE) having a mol wt Mn in the range from 1000 to about 10,000 are converted to monofunctionalized macromers, so as, in the first instance, to provide a reactive double bond (for example, a vinylbenzyl group) at only one end of the PAPE; and, in the second instance, to provide a triple bond (benzylethynyl group) at only one end of the PAPE. The macromer may be a polysulfone, a polyketone, or a copolymer containing both sulfone and ketone-containing units; or, the macromer may be monofunctionalized PPO. The synthesis of macromers with terminal double bonds is carried out with a fast and quantitative modified Williamson etherification of the PAPE with an electrophilic haloalkyl reactant ('HAR') such as chloromethylstyrene ('C1MS') in the presence of a major molar amount (more than 50 mol % based on the number of moles of OH group originally present in the oligomer) of a phase transfer catalyst such as tetrabutylammonium hydrogen sulfate ('TBAH'). The vinyl groups at the end of the marcomer may then be converted to an ethynyl group by bromination of the macromer in CH.sub.2 Cl.sub.2 or CHCl.sub.3, followed by dehydrobromination in the presence of potassium-tert-butoxide ('K-t-Bu'). The glass transition temperature (T.sub.g) of the comb-like polymer produced from (monostyrenated) macromer after curing, is unexpectedly higher than that of the terminally halogenated macromer which the comb-like polymer is derived.