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:
Mar. 27, 1990
Filed:
Nov. 18, 1987
Applicant:
Inventors:
Friedrich-Wilhelm Kupper, Marl, DE;
Heinz-Werner Voges, Dorsten, DE;
Werner Patzold, Gladbeck, DE;
Richard Schaaf, Haltern, DE;
Assignee:
Huels Aktiengesellschaft, Marl, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560067 ; 560075 ; 524219 ;
Abstract
Useful for the stabilization of polymers, especially polypropylene and polyethylene are esters of 3-tert-butyl or 3-tert-butyl-5-alkyl-4-hydroxyphenyl(alkane) carboxylic acids with oxethylates of bis-(4- or 2-hydroxyphenyl) alkanes, oxides, sulfides or sulfones, with oxethylates of tris-(4-hydroxyphenyl) alkanes, or with oxethylates of 1,3,5-tris-(4-hydroxyphenyl isopropylidene) aryls, the oxethylate preferably comprising a hydroxyethoxy group substituted for each hydroxyl group.