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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 9751968 B1

PDFFull Text
Date of Patent:
Sep. 05, 2017

Filed:

Sep. 11, 2014

Vinyl alcohol polymer, thickening agent, stabilizer for emulsion polymerization, stabilizer for suspension polymerization, coating agent, coated article, sizing agent for fibers, sized yarn, and production method of textile

Applicant:

Kuraray Co., Ltd., Kurashiki-shi, JP;

Inventors:

Masaki Kato, Kurashiki, JP;

Hideki Maki, Kurashiki, JP;

Keishi Hachiya, Kurashiki, JP;

Masako Kawagoe, Kurashiki, JP;

Yoko Mori, Osaka, JP;

Assignee:

KURARAY CO., LTD., Kurashiki-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Hui Chin

Int. Cl.
CPC ...
C08L 29/04 (2006.01); C08F 216/06 (2006.01); B41M 5/337 (2006.01); C08F 16/00 (2006.01); C08F 8/12 (2006.01); C09D 129/04 (2006.01); D06M 15/333 (2006.01); D21H 19/20 (2006.01); B65D 65/42 (2006.01); D21H 27/00 (2006.01); D21H 27/10 (2006.01); D21H 17/36 (2006.01); D21H 19/60 (2006.01); D21H 21/16 (2006.01); B41M 5/52 (2006.01);
U.S. Cl.
CPC ...
C08F 216/06 (2013.01); B41M 5/337 (2013.01); B41M 5/5254 (2013.01); B65D 65/42 (2013.01); C08F 8/12 (2013.01); C08F 16/00 (2013.01); C09D 129/04 (2013.01); D06M 15/333 (2013.01); D21H 17/36 (2013.01); D21H 19/20 (2013.01); D21H 19/60 (2013.01); D21H 21/16 (2013.01); D21H 27/001 (2013.01); D21H 27/10 (2013.01); B41M 2205/02 (2013.01); B41M 2205/32 (2013.01);
Abstract

Provided by the present invention is a PVA having highly harmonized adequate water solubility, thickening property and coating film strength, and having superior storage stability in terms of the viscosity in an aqueous solution. A vinyl alcohol polymer having a ratio (Mw (A)/Mn (A)) of the weight average molecular weight (Mw (A)) to the number average molecular weight (Mn (A)) of 3 or greater and 8 or less, and being capable of giving a vinyl alcohol polymer having a ratio (Mw/Mn) of a weight average molecular weight (Mw) to a number average molecular weight (Mn) of 2 or greater and less than 3 when treated at 40° C. for 1 hour in a sodium hydroxide solution.

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