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. 17, 2013
Filed:
Jan. 12, 2012
Patrick Fuertes, Lomme, FR;
Hervé Wyart, Cuinchy, FR;
Patrick Fuertes, Lomme, FR;
Hervé Wyart, Cuinchy, FR;
Roquette Freres, Lestrem, FR;
Abstract
A dianhydrohexitol diester composition is obtained by esterifying a dianhydrohexitol composition with a carboxylic acid in the presence of an acid catalyst and hypophosphorous acid. Preferably, the hypophosphorous acid is introduced in an amount between 0.05 and 2 wt. percent of dianhydrohexitol, and in a hypophosphorous acid/acid catalyst weight ratio of less than 1/1. Dianhydrohexitol diester compositions, for example isosorbide diesters, isomannide and/or isoidide rich in diester(s), and having a low yellow index (YI), are useful in numerous industrial applications, in particular in plastic compositions.