The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2004
Filed:
Jun. 12, 2001
Applicant:
Inventors:
Stephen M. Hoyles, Lake Jackson, TX (US);
Ramki Subramanian, Pearland, TX (US);
Marcos Franca, Lake Jackson, TX (US);
Assignee:
Dow Global Technologies Inc., Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 5/914 ; C08L 6/300 ; C08L 6/302 ; C08L 6/310 ;
U.S. Cl.
CPC ...
C08G 5/914 ; C08L 6/300 ; C08L 6/302 ; C08L 6/310 ;
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.