Mitsui Chemicals, Inc.

Masakazu Kageoka

Satoshi Yamasaki

Daisuke Hasegawa

Goro Kuwamura

Toshihiko Nakagawa

Hirokazu Morita

Daisuke Nishiguchi

Toshiaki Moriya

Masumi Saruwatari

Naoki Shinohara

Hiroaki Tago

Wataru Aoki

Katsumi Inaoka

In a polyurethane gelincluding a gel layerand a coat layercovering the gel layerthe gel layeris produced by allowing at least aliphatic polyisocyanate having an average functionality of more than 2.0 to react with polyol having an average functionality of 3.0 or less, and the coat layeris produced by allowing at least aliphatic diisocyanate and/or alicyclic diisocyanate to react with bifunctional active hydrogen compound.

Polyurethane gel and production method thereof

A method for producing a polyurethane resin includes a reaction step of obtaining a primary product by reacting a polyisocyanate component containing a bis(isocyanatomethyl)cyclohexane with a polyol component containing a low molecular weight polyol having a number average molecular weight of 400 or less and a high molecular weight polyol having an average molecular weight of 2500 or more and 4000 or less under the presence of a bismuth catalyst, and a heat treatment step of heat treating the primary product to obtain a polyurethane resin. The bismuth catalyst content in the polyurethane resin is 0.1 ppm or more and 1000 ppm or less, and the heat treatment conditions in the heat treatment step are 50&#xb0; C. or more and 100&#xb0; C. or less and three days or more and ten days or less.

Producing method of polyurethane resin, polyurethane resin, and molded article

A foaming thermoplastic polyurethane resin is a reaction product of a polyisocyanate component containing a bis(isocyanatomethyl)cyclohexane and a polyol component. In a peak of chromatogram obtained by measurement of the foaming thermoplastic polyurethane resin with gel permeation chromatography, the area of a high molecular weight component having a weight average molecular weight of 400,000 or more with respect to the total area of the peak is 25% or more and 60% or less.

Foaming thermoplastic polyurethane resin, producing method thereof, and molded article

A foam polyurethane material is a reaction-foaming-product of a composition containing a polyisocyanate (a), an isocyanate-terminated prepolymer (b) containing 0.3 mass % or more and less than 5 mass % of an isocyanate group, a polyol (c), and a catalyst.

Foam polyurethane material, molded article, and method for producing foam polyurethane material

A low-resilience polyurethane foam is produced by allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), and blowing agent (d) to react. The polyisocyanate (a) contains bis(isocyanatomethyl)cyclohexane, and the polyol (b) contains 5 to 30 mass % of polyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and 70 to 95 mass % of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g.

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Kawasaki, Japan

Masakazu Kageoka