Aromatic polyethersulphones having --OCH.sub.2 COR end groups
US4296217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1979 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Feb 22, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31504
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic polyethersulphones that are particularly useful as adhesives and coatings having end groups of formula --OCH.sub.2 COR, where R is alkyl or alkoxy. Preferred examples are --OCH.sub.2 COCH.sub.3 and --OCH.sub.2 COOC.sub.2 H.sub.5. Such polymers may be made by heating polyethersulphones made from halophenates or bisphenate/dihalide mixtures, in the presence of a reagent of formula XCH.sub.2 COR (X is halogen, preferably chlorine), such as chloroacetone or ethyl chloroacetate, for a short period of time. Such polymers of molecular weight (RV<0.25) are of particular use in coating compositions comprising a dispersion of a fluorocarbon polymer dispersed in a solution or dispersion of the polyethersulphone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.