Patent · US Active

Method of forming phenylene ether oligomer

US10259762B2 · kind B2 · utility

0Cited by

18References

15Claims

0Family size

Assignee

SABIC GLOBAL TECHNOLOGIES B.V. · NL

Inventors

Rajesh Chowdhury · Kanchinakote, IN
Eylem Tarkin-Tas · Delmar, US
Xuezhi Jin · Branford, US

Key dates

Filing date	Nov 10, 2016
Grant date	Apr 16, 2019
Priority date	—
Expiry date	Nov 10, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/485
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A phenylene ether oligomer is prepared by a process that includes partially converting 2,6-dimethylphenol to 3,3′,5,5′-tetramethyl-4,4′-dihydroxybiphenyl and/or 3,3′,5,5′-tetramethyldiphenoquinone, converting the residual 2,6 dimethylphenol to poly(2,6-dimethyl-1,4-phenylene ether) and any 3,3′,5,5′-tetramethyl-4,4′-dihydroxybiphenyl to 3,3′,5,5′-tetramethyldiphenoquinone, and reacting the poly(2,6-dimethyl-1,4-phenylene ether) and 3,3′,5,5′-tetramethyldiphenoquinone to form the phenylene ether oligomer. The preparation can be conducted without isolation of intermediates.

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