Title:
EPOXY RESING AND PROCESS FOR MAKING THE SAME
Document Type and Number:
WIPO Patent Application WO2002000755
Kind Code:
A3
Abstract:
An epoxy or phenolic functional polyester/polyether oligomer or polymer having a functionality of greater than 2 and comprising moieties derived from diglycidyl ethers or diglycidyl esters, anhydrides and dihydric phenols. The oligomer or polymer is prepared by (1) reacting a liquid epoxy resin (LER), along with a dihydric phenol, with a cyclic anhydride, in the presence of a catalyst, the cyclic anhydride being employed in an amount sufficient to achieve the desired functionality but insufficient to form gels in the anhydride-modified epoxy resin.
Inventors:
HOYLES STEPHEN M
SUBRAMANIAN RAMKI
FRANCA MARCOS
SUBRAMANIAN RAMKI
FRANCA MARCOS
Application Number:
PCT/US2001/018906
Publication Date:
May 23, 2002
Filing Date:
June 12, 2001
Export Citation:
Assignee:
DOW CHEMICAL CO (US)
International Classes:
C08G59/02; C08G59/42; C08G63/19; C09D5/03; C09D163/00; C08G59/00; C09D163/02; (IPC1-7): C08G59/42; C08G59/02; C08G59/62; C09D163/00; C09D5/03
Foreign References:
| US4214068A | 1980-07-22 | |||
| GB1389937A | 1975-04-09 | |||
| US2970983A | 1961-02-07 |
Other References:
DATABASE CHEMABS [online] Chemical Abstracts Service, Columbus, Ohio, US; TANAKA, YOSHIO ET AL.: "Epoxy compounds. II Gelation point of the epoxy resin acid anhydride system", XP002186894, Database accession no. 60:31679
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