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. 15, 2009
Filed:
Aug. 15, 2003
Applicant:
Mathias Mehrer, Gablingen, DE;
Inventor:
Mathias Mehrer, Gablingen, DE;
Assignee:
Clariant Produkte (Deutschland) GmbH, Sulzbach, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 401/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
The instant invention relates to a process for the preparation of stabilizers for polymers, especially for polyamides, by condensation of isophthalic acic dichloride (IPC) with sterically hindered amines of the type tetraalkylpiperidine. By using organic solvents or mixtures of organic solvents with water and by an optimized combination of temperature and pressure the yield is much higher than by using water alone. The organic load of the waste water could be significantly reduced.