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:
Aug. 28, 2007
Filed:
Nov. 17, 2003
Daniel Rehm, March, DE;
Johannes Schäfter, Lörrach, DE;
Paul Adriaan Van Der Schaaf, Hagenthal-le-Haut, FR;
Christian Guckel, Bad Säckingen, DE;
Daniel Rehm, March, DE;
Johannes Schäfter, Lörrach, DE;
Paul Adriaan Van Der Schaaf, Hagenthal-le-Haut, FR;
Christian Guckel, Bad Säckingen, DE;
Ciba Specialty Chemicals Corp., Tarrytown, NY (US);
Abstract
The invention relates to a process for preparing solid particles of a phenolic antioxidant from the IRGANOX series in the form of crystals, particularly IRGANOX 1010 and 1098, the crystal particles obtainable by the process, the further processing of the crystal particles, an aqueous dispersion comprising the phenolic antioxidant, novel crystal modifications of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate] (μ-form) and N,N'-hexane-1,6diyl-bis[3-(3,5-di-tert-butyl-4-hydroxypheylpropamide)] (β-form) and aqueous dispersion comprising the new crystal modifications.