Asahi Kasei Kogyo Kabushiki Kaisha

Yasushi Kishimoto

Hideo Morita

Akira Ide

Koichi Miyamoto

Shinsaku Ogawa

Tetsuo Masubuchi

Yoshikuni Akiyama

Masataka Ikeda

Takeshi Ikematu

Tsunesuke Doi

Ken Mizushiro

Sojiro Matsumoto

Kazurou Komatsu

Kohichi Shohji

A stretchable nonwoven fabric manufactured by using a hydrogenated block copolymer obtained by hydrogenating a block copolymer including polymer blocks A constituted mainly by a vinyl aromatic compound and a polymer block B constituted mainly by a conjugated diene compound, at least one polymer block B being arranged on an end of a polymer chain of the block copolymer, as a raw material. The spinning property and characteristics of the nonwoven fabric can be further improved by adding a polyolefin to the above raw material. The obtained stretchable nonwoven fabric has a superior strength, extension characteristics, i.e., elongation and extension recovery, and weathering resistance, and can be broadly used for many applications due to those characteristics.

Stretchable nonwoven fabric and method of manufacturing the same

A shape memory polymer resin, consisting essentially of a block copolymer having an A-B-A block structure in the polymer chain, and having a weight average molecular weight within the range of 10,000 to 1,000,000, wherein

Shape memory polymer resin, composition and the shape memorizing molded

A composition having a composition containing substantially no other engineering thermoplastic resin and a compression set (JIS K 6301; 100.degree. C..times.22 hours; and compressibility, 25%) of 65% or less as rubber which comprises:

Hydrogenated block copolymer compositions

An olefin hydrogenation catalyst containing as an essential component a compound represented by the formula: ##STR1## The catalyst is capable of selectively hydrogenating the unsaturated double bonds of the diene units of a conjugated diene polymer or copolymer having a number average molecular weight of 500 to 1,000,000, particularly a styrenebutadiene block copolymer comprising at least one polymer block A composed mainly of styrene and at least one polymer block B composed mainly of 1,3-butadiene and/or isoprene. The hydrogenated block copolymer obtained from such selective hydrogenation is useful as an elastomer, a thermoplastic elastomer or a thermoplastic resin having excellent weather resistance and oxidation resistance.

Olefin hydrogenation catalyst, process for hydrogenating polymers with

Selective hydrogenation of unsaturated double bonds in conjugated diene units of a conjugated diene polymer resulting from polymerization of copolymerization of a conjugated diene is effected by a method which comprises hydrogenating the conjugated diene polymer in an inert solvent in the presence of:

Method for hydrogenation of polymer

4-Isocyanate methyl-1,8-octamethylene diisocyanate of the formula (I), ##STR1## and a method of preparing 4-isocyanate methyl-1,8-octamethylene diisocyanate of the formula (I) which comprises reacting 4-aminomethyl-1,8-diaminooctane of the formula (II), ##STR2## or its salt with phosgene at a temperature of about 70.degree. C. to about 220.degree. C. in an inert reaction medium.

Aliphatic triisocyanate, a method for preparing it and the preparation

An isocyanate prepolymer represented by the formula ##STR1## wherein n is an integer of 1 to 6, R', R' and R'', which may be the same or different, each represents a divalent aliphatic, araliphatic, aromatic or acyclic group which may contain a ##STR2## bond, and R' and R'' may contain a ##STR3## bond, and a process for producing the same.

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Kawasaki, Japan

Yasushi Kishimoto