Comb-like polymers and graft copolymers from polyarylene polyether macromonomers
US5091480A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1989 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | May 12, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.