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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.:

US 9745491 B1

PDFFull Text
Date of Patent:
Aug. 29, 2017

Filed:

Dec. 27, 2013

Method for producing crosslinked polymer, crosslinked polymer, and coating composition containing the same

Applicants:

Yumiko Hayashi, Hirakata, JP;

Sachiko Morimoto, Hirakata, JP;

Manabu Yamaoka, Hirakata, JP;

Naoya Yabuuchi, Hirakata, JP;

Inventors:

Yumiko Hayashi, Hirakata, JP;

Sachiko Morimoto, Hirakata, JP;

Manabu Yamaoka, Hirakata, JP;

Naoya Yabuuchi, Hirakata, JP;

Assignee:

NIPPON BEE CHEMICAL CO., LTD., Hirakata, Osaka, JP;

Attorney:

Ladas & Parry LLP

Primary Examiner:

Peter D Mulcahy

Int. Cl.
CPC ...
C08L 33/14 (2006.01); C09D 133/06 (2006.01); C08L 31/00 (2006.01); C08L 33/06 (2006.01); C08L 31/06 (2006.01); C08L 31/02 (2006.01);
U.S. Cl.
CPC ...
C09D 133/066 (2013.01); C08L 31/00 (2013.01); C08L 31/02 (2013.01); C08L 31/06 (2013.01); C08L 33/062 (2013.01); C08L 33/064 (2013.01); C08L 33/066 (2013.01); C08L 33/14 (2013.01); C08L 2312/06 (2013.01);
Abstract

The object of the present disclosure is to provide a method for producing a crosslinked polymer by radical polymerization of a monomer composition, by which method a desired crosslinked polymer can be produced in a high solid content with good productivity (also at a low production cost), and a crosslinked polymer obtained by the production method and a coating composition containing the same. A method for producing a crosslinked polymer having a weight average molecular weight of 15000 to 200000, the method comprising step [I] of obtaining a crosslinked polymer (A) by conducting polymerization of a monomer composition comprising 2 to 30% by weight of a polyfunctional methacrylate having 2 to 4 functional groups (a) and 98 to 70% by weight of one or more polymerizable monomers selected from the group consisting of monofunctional (meth)acrylates, (meth)acrylic acid, and monofunctional vinyl aromatic compounds (b) in an organic solvent in the presence of a radical polymerization initiator in a temperature region where the radical polymerization initiator comes to have a half-life of 4 to 18 minutes.

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