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. 15, 2016
Filed:
Mar. 29, 2011
Kunihiko Kobayashi, Minato-ku, JP;
Katsuhiko Sakata, Minato-ku, JP;
Tsukasa Iwamoto, Minato-ku, JP;
Nobuhiro Matsuda, Minato-ku, JP;
Osamu Ishikawa, Minato-ku, JP;
Kunihiko Kobayashi, Minato-ku, JP;
Katsuhiko Sakata, Minato-ku, JP;
Tsukasa Iwamoto, Minato-ku, JP;
Nobuhiro Matsuda, Minato-ku, JP;
Osamu Ishikawa, Minato-ku, JP;
JSR Corporation, Tokyo, JP;
Abstract
To provide a copolymer latex having a small particle size, which has a sufficient adhesion strength as a binder and a low viscosity and excellent handling properties in a composition containing a filler and the like, a composition for coating paper using the copolymer latex, and a coated paper having a coating layer formed by the composition. A copolymer latex contains a copolymer comprising: (A) 20 to 80% by mass of a structural unit derived from an aliphatic conjugated diene monomer, (B) 4 to 15% by mass of a structural unit derived from an unsaturated carboxylic acid monomer, and (C) 5 to 76% by mass of a structural unit derived from other copolymerizable monomer, wherein the total of (A), (B) and (C) being 100% by mass, and has a number average particle size of 30 to 80 nm by measurement with a transmission electron microscope, and has a viscosity of 50 to 400 mPa·s at a solid content of 48% by mass.