Mitsui Chemicals, Inc.

Toyota Jidosha Kabushiki Kaisha

Toyota Boshoku Kabushiki Kaisha

Mitsui Chemicals & Skc Polyurethanes Inc.

Kazuto Usaka

Hiroyuki Utsumi

Yoshiyuki Murata

Hideaki Otsuka

Takashi Inoh

Koichi Sano

Tsuguyoshi Sakai

Satoshi Yamasaki

Hiroaki Sakaguchi

Goro Kuwamura

Takashi Abe

Daisuke Nishiguchi

Kaoru Ueno

Hisashi Kawanabe

Kouichi Sano

Yusuke Maruoka

Takuya Chikamoto

Changha Park

Sungho Lee

Yasuhiro Matsuzaka

An object of the invention is to provide molded urethane foam pads and vehicle seats that can contribute to the reduction of environmental load and have appropriate impact resilience and hardness and excellent durability with good balance, and also have high comfort. A molded urethane foam pad for vehicle seats including a polyurethane is obtainable by foaming and curing materials including a plant-derived polyol (A), a non-plant-derived polyol (B), water, a catalyst, a foam stabilizer and a polyisocyanate, and has a core density of 55 to 65 kg/mas measured in accordance with JIS K6400; the plant-derived polyol (A) is a polyol which is obtained by condensing a polyhydric alcohol of 6 hydroxyl groups with a plant-derived, C15 or higher hydroxycarboxylic acid and which has a hydroxyl value of 45 to 55 mg KOH/g; the non-plant-derived polyol (B) is a polyol having a hydroxyl value of 18 to 26 mg KOH/g, and/or a polymer-dispersed polyol in which fine particles of a polymer of a compound having an unsaturated bond are dispersed in the polyol; and the polyurethane contains a plant-derived molecular structure and the content of the plant-derived molecular structure is 15 to 20 wt % based on 100 wt % of the molded urethane foam pad.

Molded urethane foam pad for vehicle seats, vehicle seat, and processes for the production thereof

It is an object of the invention to provide a vibration damping and sound absorbing material containing a plant-derived polyol which material largely contributes a decrease of environmental load and has excellent vibration damping and sound absorbing properties, and it is another object of the invention to provide a production process of the material. Specifically, disclosed is a vibration damping and sound absorbing material which is suitably used for cars. A vibration damping and sound absorbing material comprises a polyurethane foam which comprises, as raw materials, a polyol and/or a polymer-dispersed polyol in which polymer fine particles obtainable by polymerizing an unsaturated bond-containing compound are dispersed in a polyol, and water, a catalyst and a polyisocyanate, wherein the polyol comprises (A) a plant-derived polyol produced using a raw material obtainable by a plant.

Vibration damping and sound absorbing material and production process thereof

The two-component type polyurethane composition according to the present invention is obtained from a principal component containing a compound having an isocyanate group and a curing agent containing a compound having active hydrogen, and is characterized in that both the principal component and the curing agent contain substantially no thixotropic agent, the mixture of the principal component and the curing agent has a specific thixotropy-developing time and a specific slump, the active hydrogen compound has a specific flash point, and that the mass change of the two-component type polyurethane composition before/after boiling in boiling water under specific conditions is in a specific range. The two-component type polyurethane composition according to the present invention develops excellent thixotropy immediately after mixing the principal component and the curing agent, thereby enables its application under a variety of conditions such as mechanical-application and hand-application, and has excellent sag resistance and other physical properties suitable for sealing materials.

Two-component type polyurethane composition and process of preparing the same

Microcellular polyurethane elastomer, and method of producing the same

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Chiba, Japan

Kazuto Usaka