Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Japan Elastomer Co., Ltd.

Kosuke Nakatani

Yoshifumi Araki

Nobuaki Kubo

Kenta Shibuya

Takahiro Hisasue

Takeshi Aoyagi

Daisuke Shimizu

Shigeo Nakajima

Tadashi Matsushita

Atsushi Yasumoto

Ippei Kameda

Kazuo Moritou

The adhesive composition according to the invention of the present application contains a block copolymer (a) having a block mainly comprising a vinyl aromatic monomer unit, a tackifier (b) and an oil (c), in which the block copolymer (a) contains a partially hydrogenated block copolymer (a-1), the partially hydrogenated block copolymer (a-1) has a vinyl aromatic monomer unit and a conjugated diene monomer unit, the content of the vinyl aromatic monomer unit is 10 mass % or more and 19 mass % or less based on 100 mass % of the partially hydrogenated block copolymer (a-1), and the hydrogenation ratio of double bonds contained in the conjugated diene monomer unit in the partially hydrogenated block copolymer (a-1) is 15 mol % or more and less than 80 mol % based on the total (amount) of double bonds before hydrogenation.

Adhesive composition and pressure-sensitive adhesive tape

Disclosure provides a block copolymer composition having 20% by mass or more and 90% by mass or less of a component (A) and 10% by mass or more and 80% by mass or less of a component (B), wherein the component (A) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 30,000 or higher and 190,000 or lower; and the component (B) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 60,000 or higher and 500,000 or lower.

Block copolymer and adhesive composition

A hydrogenated block copolymer composition, comprising:

Hydrogenated block copolymer composition and pressure-sensitive adhesive composition

A composition containing an oxide of titanium contains a conjugated dienic polymer and the oxide of titanium, wherein the content of the oxide of titanium is 0.10 to 75 ppm by mass in terms of titanium atom, and the average particle diameter of the oxide of titanium is 1.0 to 100 &#x3bc;m.

Composition containing oxide of titanium, polymer composition, and molded article

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Tokyo, Japan

Kosuke Nakatani