Novel fluorine-containing cyclic polymer
US4897457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1988 |
| Grant date | Jan 30, 1990 |
| Priority date | — |
| Expiry date | Aug 10, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F16/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A fluorine-containing thermoplastic resinous polymer which consist essentially of a group (a) of repeating units of a cyclic structure to be represented by the following general formula: ##STR1## (where: n is an integer of 1 to 2); the polymer having a molecular weight such that the intrinsic viscosity thereof may become at least 0.1. A fluorine-containing thermoplastic resinous polymer which consists essentially of: PA0 (i) a group (a) of repeating units to be represented by the following general formula: ##STR2## (where: n is an integer of 1 or 2), and (ii) a group (b) of repeating units to be represented by the following general formula: EQU --CF.sub.2 --CFX)-- (where: X is selected from fluorine, chlorine. O--CF.sub.2 CF.sub.2 CF.sub.3, O--CF.sub.2 CF(CF.sub.3)OCF.sub.2 CF.sub.2 SO.sub.2 F, and O--CF.sub.2 CF.sub.2 CF.sub.2 COOCH.sub.3) PA0 the polymer containing therein at least 80% by weight of the group of repeating units (a), and having a molecular weight such that the intrinsic viscosity thereof may be become at least 0.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.