Kuraray Co., Ltd.

Kuraray Asia Pacific Pte. Ltd.

Konishi Co., Ltd.

Hideki Maki

Masato Nakamae

Masaki Kato

Takeshi Kusudou

Seiji Tanimoto

Masako Kawagoe

Yousuke Kumaki

Yoko Mori

Akira Tsuboi

Toshiki Origuchi

Keishi Hachiya

Yuji Ikemura

The present invention relates to an aqueous emulsion including an ethylenically unsaturated monomer unit-containing polymer as a dispersoid and a polyvinyl alcohol as a dispersant. The content of a free polyvinyl alcohol in the aqueous emulsion is 0.2 to 20 parts by mass relative to 100 parts by mass of the ethylenically unsaturated monomer unit-containing polymer. The free polyvinyl alcohol has a degree of saponification of 80.0 to 99.5 mol % and a viscosity-average degree of polymerization of 200 to 5000, and the free polyvinyl alcohol has a symmetry factor (W/2f) that satisfies the following expression (1) as determined by gradient high-performance liquid chromatography for reversed-phase separation using a water-acetone eluent according to JIS K 0124 (2011).0.85&#x2264;/2&#x2264;1.30&#x2003;&#x2003;(1)(The definitions of the symbols are omitted.)

Aqueous emulsion and adhesive in which same is used

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&#xb0; C. for 1 hour in a sodium hydroxide solution.

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

The present invention provides a halogen-containing resin composition comprising 100 parts by weight of a halogen-containing resin; 0.01 to 2.5 parts by weight of a polyvinyl alcohol having a saponification degree of from 60 to 99.9 mol % and a viscosity-average polymerization degree of from 100 to 1,000; 0.01 to 2.5 parts by weight of a polyol having a molecular weight of 2,000 or less and a hydroxyl content of 10% by weight or more; and 0.01 to 5 parts by weight of a zinc compound.

Halogen-containing resin composition, production process therefor and molded article therefrom

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Kurashiki, Japan

Hideki Maki