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:
Sep. 20, 2016
Filed:
Aug. 18, 2011
Naoshi Kawamoto, Saitama, JP;
Tsuyoshi Urushihara, Saitama, JP;
Kohei Okamoto, Saitama, JP;
Tetsuya Seguchi, Saitama, JP;
Naoshi Kawamoto, Saitama, JP;
Tsuyoshi Urushihara, Saitama, JP;
Kohei Okamoto, Saitama, JP;
Tetsuya Seguchi, Saitama, JP;
ADEKA CORPORATION, Tokyo, JP;
Abstract
Provided is a method of producing a stabilized polymer in which inhibition of polymerization of a monomer having an ethylenically unsaturated bond is suppressed even when a specific phenolic antioxidant is added before or during the polymerization of the monomer. The method of producing a stabilized polymer is characterized by comprising the step of adding at least one phenolic antioxidant which is represented by the following Formula (I), (II) or (III) and masked with an organic aluminum to a catalyst system or a polymerization system before or during polymerization of a monomer having an ethylenically unsaturated bond: