Alkylene oxide modified poly(2,6-dimethyl-p-oxyphenylene)
US5019631A · kind A · utility
2Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Aug 21, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/5223
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A modified poly(2,6-dimethyl-p-oxyphenylene) with a glass transition temperature in the range of 180.degree.-220.degree. C. is described in which on the average between 10 and 60% of the macromolecules carry: PA1 a) an ##STR1## unit; or b) an ##STR2## unit. Said modified poly(2,6-dimethyl-p-oxyphenylene) is useful as a material in the preparation of flat membranes, in particular asymmetric membrane, for gas separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.