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:
Oct. 23, 2007
Filed:
Jul. 27, 2005
Wayne R. Pretzer, Wheaton, IL (US);
Geraldine N. Mcdonald, Homer Glenn, IL (US);
Wayne R. Pretzer, Wheaton, IL (US);
Geraldine N. McDonald, Homer Glenn, IL (US);
Flint Hills Resources, S.a.r.l., Wichita, KS (US);
Abstract
The present invention relates to trimellitic anhydride imide ester, a method of making it, and polyesters or polyamides that can be modified with trimellitic anhydride (TMA) to provide better heat resistance and mechanical properties. With the present invention, there are two processes for making TMA-ester. The first process is by charging into a reactor equimolar amounts of trimellitic anhydride and primary hydroxyalkylamine, primary carboxylalkylamine or primary carboxylarylamine, with an excess of alcohol or diol. The second process for producing the imide ester is to react two moles of TMA with one mole of a diamine of the formula HN—X—NHwith an excess of alcohol or diol; where X is an aliphatic, alicyclic, or aromatic group. Generally the reactor contains water as a dispersant for the reactants. The reaction time is from about 1-8 hours. The reaction temperature is from about 160° C. to about 220° C. After the cessation of water/alcohol production, the reaction is finished and the contents of the reactor can be cooled to cause the desired solid product to precipitate our. The solid is then separated by filtration or centrifugation.