Crosslinkable rigid-rod benzobisazole copolymer
US5003035A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Jul 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There are provided para-ordered aromatic heterocyclic copolymers having repeating groups of the following formulas: ##STR1## wherein a, b, c, d, and e are positive integers, each representing an average number of the respective different recurring units present in the repeating group, m and n are 1 or 2, R and R' are alkyl groups having 1 to 4 carbon atoms, and Q is a benzobisazole group of the formula: ##STR2## wherein Y is --O--, --S--, or --NH--. In the copolymers wherein m or n is 2, the R or R' groups can be the same or different. In copolymer I, the ratio a:b can be about 1:1 to 99:1. In copolymer II, the ratio c:(d+e) can be about 1:1 to 99:1, and the ratio d:e can be aobut 1:99 to 99:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.