Kuraray Co., Ltd.

Shizuo Iwata

Koji Hirai

Hisao Yoneda

Tetsuya Ashida

Kimio Nakayama

Michihiro Ishiguro

Shinya Katoh

Shinya Kato

Disclosed are thermoplastic polyurethanes obtainable by reacting (a) a polyester-polyol that satisfies all the following requirements (1) to (4):

Thermoplastic polyurethanes and molded articles comprising them

A laminate comprising a layer formed by melt molding a thermoplastic polyurethane and a fibrous base layer, a film or sheet melt molded from the thermoplastic polyurethane, and a thermoplastic polyurethane composition comprising the thermoplastic polyurethane and tin compound in an amount of 0.3 to 15 ppm (in terms of tin atom) based on the thermoplastic polyurethane; the thermoplastic polyurethane being a thermoplastic polyurethane obtained from a polymeric diol (a) having a number average molecular weight of 1,500 to 4,000, an organic diisocyanate (b) and a chain extender (c) and having an inherent viscosity of at least 0.9 dl/g and a retention of long-chain hard segments when heat melted of at least 80%, the polymeric diol (a) having a crystallization enthalpy (.DELTA.H) of not more than 70 J/g and having low molecular diol units comprising at least 30 mole % of 1,9-nonanediol units. These articles are excellent in resistance to abrasion melting and abrasion and resistance to bleed/whitening and also good in tensile strength and like mechanical properties, durability and cold resistance, as well as softness and flexibility, so that they can be used for leather-like products and other various purposes.

Laminate comprising a polyurethane layer

Disclosed are thermoplastic polyurethanes obtainable by reacting (a) a polyester-polyol that satisfies all the following requirements (1) to (4): (1) its ester group content (number of ester bonds/number of all carbon atoms) is from 0.08 to 0.17; (2) it has hydroxyl groups of from 2.01 to 2.08 per one molecule; (3) it has a number average molecular height of from 1000 to 7000; and (4) it has a crystallization enthalpy (.DELTA.H) of 70 J/g or less, (b) an organic diisocyanate and (c) a chain extender at a ratio that satisfies the following numerical formula (i):

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Saijou, Japan

Shizuo Iwata