Japan Synthetic Rubber Co., Ltd.

Yoshiharu Hashiguchi

Kunio Goshima

Toshio Teramoto

Yasuhiko Takemura

Tooru Shibata

Noboru Oshima

Hozumi Sato

Takashi Ishida

Takashi Nishioka

Katsuo Koshimura

Takayoshi Tanabe

Minoru Hasegawa

Hideo Katsumata

Hiroyuki Sasanuma

Motokazu Takeuchi

Yoshiyuki Higuchi

A water-developable photosensitive resin composition which exhibits a small swelling, small reduction in strength and small dimension change when developed with water and which has an excellent balance of characteristics. Said composition comprises (1) a oarboxyl group-containing diene polymer, (2) a hydrogenated diene block polymer in which at least 80% of the double bonds in the recurring unit consisting of conjugated diene has been hydrogenated, (3) a photopolymerizable ethylenically unsaturated monomer, (4) an amino group-containing compound and (5) a photopolymerization initiator.

Photosensitive resin composition comprising a carboxyl group-containing

A hydrogenated block copolymer or hydrogenated block copolymer mixture consisting essentially of (a) hydrogenation product of a star-branched block copolymer represented by the structural formula (A-B).sub.n X wherein A is a polybutadiene block having a 1,2-vinyl content of less than 25% by weight and B is a copolymer block containing 50% by weight or more of a conjugated diene compound whose vinyl content is 25% by weight or more, X is a coupling agent residue and n is an integer of 3 or more, and (b) a hydrogenation product of a straight chain block copolymer represented by the structural formula A-B wherein A and B are as defined above, the weight ratio of the component (a) to the component (b) being 100/0 to 5/95, and a hydrogenated block copolymer composition comprising (I) 1 to 99 parts by weight of said hydrogenated block copolymer or hydrogenated block copolymer mixture and (II) 99 to 1 part by weight of a thermoplastic resin and/or a rubbery polymer. Said hydrogenated block copolymer or hydrogenated block copolymer mixture can be pelletized and is excellent in the improving effect on impact resistance, heat resistance, stiffness, processibility and appearance of molded article when used as a quality-improving agent for a thermoplastic resin. Said hydrogenated block copolymer composition is a composition having excellent balance of impact resistance, heat resistance, stiffness, processibility and appearance of molded article or a thermoplastic elastomer having excellent mechanical properties.

Hydrogenated block copolymer and hydrogenated block copolymer compositon

A hydrogenated diene block copolymer having a polystyrene-reduced number-average molecular weight of 50,000-600,000 which is a hydrogenation product of an (A)-(B) block copolymer in which (A) means an alkenyl aromatic compound polymer block and (B) means a conjugated diene homopolymer block wherein the vinyl content of the conjugated diene portion is more than 60%, or an alkenyl aromatic compound-conjugated diene random copolymer block wherein the vinyl content of the conjugated diene portion is 15% or more, an (A)-(B)-(C) block copolymer in which (A) and (B) are as defined above and (C) means an alkenyl aromatic compound-conjugated diene copolymer tapered block wherein the proportion of the alkenyl aromatic compound increases gradually, or an (A)-(B)-(A) block copolymer in which (A) and (B) are as defined above. Said hydrogenated diene block copolymer is useful as a modifier for polar resins, non-polar resins or both of them.

(Modified) hydrogenated diene block copolymer and composition comprising

A hydrogenated diene block copolymer having a polystyrene-reduced number-average molecular weight of 50,000-600,000 which is a hydrogenation product of an (A)-(B) block copolymer in which (A) means an alkenyl aromatic compound polymer block and (B) means a conjugated diene homopolymer block wherein the vinyl content of the conjugated diene portion is more than 60%, or an alkenyl aromatic compound-conjugated diene random copolymer block wherein the vinyl content of the conjugated diene portion is 15% or more, an (A)-(B)-(C) block copolymer in which (A) and (B) are as defined above and (C) means an alkenyl aromatic compound-conjugated diene copolymer tapered block wherein the proportion of the alkenyl aromatic compound increases gradually, or an (A)-(B)-(A) block copolymer in which (A) and (B) are as defined above and in which hydrogenation product at least 80% of the double bonds of the conjugated diene portion is saturated by the hydrogenation. Said hydrogenated diene block copolymer is useful as a modifier for polar resins, non-polar resins or both of them.

Hydrogenated diene block copolymer and composition comprising the same

A catalyst composition comprising: (a) a bis(cyclopentadienyl) transition metal compound, (b) at least one polarized compound selected from the group consisting of carbonyl group-containing compounds and epoxy group containing compounds, and (c) an organic lithium compound. It has a high hydrogenation activity and is useful for hydrogenating olefinically unsaturated polymers for providing the olefinically unsaturated polymers with excellent characteristics as superior weatherability, good heat resistance, superb oxidation resistance, and the like.

Catalyst composition for hydrogenating olefinically unsaturated polymers

A hydrogenated diene block copolymer having a polystyrene-reduced number-average molecular weight of 50,000-600,000 which is a hydrogenation product of an (A)--(B) block copolymer in which (A) means an alkenyl aromatic compound polymer block and (B) means a conjugated diene homopolymer block wherein the vinyl content of the conjugated diene portion is more than 60%, or an alkenyl aromatic compound-conjugated diene random copolymer block wherein the vinyl content of the conjugated diene portion is 15% or more, an (A)--(B)--(C) block copolymer in which (A) and (B) are as defined above and (C) means an alkenyl aromatic compound-conjugated diene copolymer tapered block wherein the proportion of the alkenyl aromatic compound increases gradually, or an (A)--(B)--(A) block copolymer in which (A) and (B) are as defined above, in which block copolymer

A hydrogenation catalyst composition comprising, as essential components, (a) at least one bis(cyclopentadienyl)transition metal compound represented by general formula (i): ##STR1## and (b) at least one member selected from the group consisting of complex compounds represented by general formulas (ii) and (iii): ##STR2## and further comprising, if necessary, (c) at least one polar compound selected from the group consisting of ether compounds, thioether compounds, ketone compounds, sulfoxide compounds, carboxylic acid ester compounds, lactone compounds, amine compounds, amide compounds, nitrile compounds and oxime compounds and/or (d) an alkali compound represented by general formula (iv):

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Yokkaichi, Japan

Yoshiharu Hashiguchi