Patent · US Expired

Thermoplastic polyarylene ethers

US4889909A · kind A · utility

19Cited by

6References

7Claims

0Family size

Assignee

Rohm Co., Ltd. · JP

Inventors

Sigmund Besecke · Seeheim-Jugenheim, DE
Joachim Knebel · Zwingenberg, DE
Guenter Schroeder · Olching, DE
Werner Ude · Darmstadt, DE

Key dates

Filing date	Jul 19, 1988
Grant date	Dec 26, 1989
Priority date	—
Expiry date	Jul 19, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/4012
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

High-temperature-resistant, thermoplastically processable polyarylene ethers with repeating structural units of the general formula ##STR1## wherein A represents 4,4'- or 4,4"-benzophenone units of the formula ##STR2## with z being 0 or 1, B represents 9,9-bis(4'-phenyl)fluorene units of the formula ##STR3## and C represents 2,2-bis(4-phenyl)propane units of the formula ##STR4## which are linked to one another in etherlike fashion through oxygen atoms, the composition of the polyarylene ethers being determined by m and n, the molar ratio of which ranges from 30:70 to 90:10, and wherein the sequence of the segments containing B or C may be random.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.