Kuraray Co., Ltd.

Atsushi Inatomi

Tadahito Fukuhara

Akio Fujita

Hiroshi Kanbara

Satomi Ohta

Yoshikazu Ueno

Goro Kobayashi

Junya Takai

Kenta Toshinari

Yuki Fujii

Zhaoming Ma

A conjugated diene graft polymer having high transparency, heat resistance and weather resistance, and a method for producing the conjugated diene graft polymer. A method for producing a conjugated diene graft polymer in which a side chain (b) including a polymer including at least one monomer unit selected from a conjugated diene unit and an aromatic vinyl compound unit is bonded to a main chain (a) including a polymer including a conjugated diene unit, via a hetero atom Z serving as a branching point and having a valence of not less than 3, the method including reacting a specific active end polymer and a specific functional group-modified conjugated diene polymer having a functional group in a side chain to thereby produce a conjugated diene graft polymer; and recovering the conjugated diene graft polymer obtained.

Conjugated diene graft polymer and method for producing the same

An oil-resistant film may be provided by an oil-resistant base material that is excellent in the oil resistance even in not only a plane part but also a bent part of a package can be obtained and also to the provision of an oil-resistant base material having the oil-resistant film and an oil-resistant paper having the oil-resistant film. An oil-resistant film may contain a polyvinyl alcohol-based polymer (A) and a polymer particle (B) containing a polymer having a glass transition temperature of 40° C. or lower, wherein the content of the polymer particle (B) is 1 part by mass or more and less than 150 parts by mass based on 100 parts by mass of the polyvinyl alcohol-based polymer (A); and an oil-resistant base material (oil-resistant paper) having the oil-resistant film on a base material (paper).

Grease-resistant film, grease-resistant base material, and grease-resistant paper

The present invention relates to monodisperse hydrogel particles containing a cross-linked product of a vinyl alcohol-based polymer having an ethylenically unsaturated group and an average degree of polymerization of 450 or more, the monodisperse hydrogel particles having an average particle size of 10 to 5,000 μm, and a coefficient of variation of a particle size distribution of 10% or less.

Monodisperse hydrogel particles

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Tsukuba, Japan

Atsushi Inatomi