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:
Dec. 10, 2002
Filed:
Sep. 05, 2001
Applicant:
Inventors:
Assignee:
ARCO Chemical Technology, L.P., Greenville, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 6/302 ;
U.S. Cl.
CPC ...
C08G 6/302 ;
Abstract
A two-step process for making reactive unsaturated polyester resins is disclosed. First, an aromatic dicarboxylic acid derivative reacts with 2-methyl-1,3-propanediol (MPD) to produce an ester diol intermediate. The intermediate reacts with maleic anhydride and from about 15 to about 40 mole percent, based on the total glycol requirement, of propylene glycol. By shifting some glycol to the second step, and by using propylene glycol there, resin producers can easily make MPD-based UPR having a fumarate content greater than 85%. The resins give thermosets with improved physical properties, including excellent water resistance.