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:
Jan. 16, 1979
Filed:
Sep. 30, 1977
Applicant:
Inventors:
Hans Feichtinger, Dinslaken, DE;
Siegfried Lutze, Gelsenkirchen, DE;
Hans-Walter Birnkraut, Oberhausen, DE;
Werner Kluy, Bochum-Stiepel, DE;
Assignee:
Ruhrchemie Aktiengesellschaft, Oberhausen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
260848 ; 260 / ; 260 / ;
Abstract
A phenol/formaldehyde condensation product of a 4,4'-thio-bis-(dialkylphenol) and formaldehyde having a molecular weight of 1,000 to 4,000; a process for preparing such a condensation product by contacting 4,4'-thio-bis-(dialkylphenol) and a source of formaldehyde in the presence of a protonic acid catalyst; and the use of such a condensation product as an antioxidant in an olefin polymer or copolymer composition.