Polyarylene ether sulfone (PAES) polymers
US9868825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Apr 30, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y10/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A poly(arylether sulfone) polymer [(t-PAES) polymer, herein after], wherein more than 70% moles of the recurring units are recurring units (Rt) of formula (St): -E-Ar1—S02-[Ar2-(T-Ar3)n—SO2]m-Ar4— (formula St) wherein: n and m, equal to or different from each other, are independently zero or an integer of 1 to 5, each of Ar1, Ar2, Ar3 and Ar4 equal to or different from each other and at each occurrence, is an aromatic moiety, T is a bond or a divalent group optionally comprising one or more than one heteroatom; -E is of formula (Et), wherein each of R′, equal to or different from each other, is selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; j′ is zero or is an integer from 1 to 4, and said (t-PAES) polymer having a number average molecular weight (Mn) ranging from 41 000 to 90 000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.