Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Hironori Katagawa

Yoshiyuki Asahina

Masakazu Yamauchi

Kazuko Nakajima

Eiko Tanaka

Misa Horinouchi

Kaoru Ueyanagi

The present invention provides a polyisocyanate composition wherein the composition is obtained from an aliphatic diisocyanate unit including 1,6-diisocyanatohexane, and has an isocyanurate group, a uretdione group, a uretonimine group, and an iminooxadiazinedione group, and the molar ratio of the uretonimine group to the isocyanurate group is 0.0010 to 0.0050, and the molar ratio of the iminooxadiazinedione group to the isocyanurate group is 0.00050 to 0.30.

Polyisocyanate composition, coating composition, coating film and method for producing same, and humidity stabilization method

Disclosed is a polyisocyanate composition which is excellent in both curability and drying characteristic. The polyisocyanate composition contains at least one compound selected from aliphatic diisocyanates, at least one compound selected from alicyclic diisocyanates and at least one compound selected from polyols, while satisfying all of the following conditions; i) the diisocyanate monomer concentration is not more than 3 mass %, ii) the polyol component concentration is 1-50 mass %; and iii) the glass transition temperature is from &#x2212;50&#xb0; C. to 0&#xb0; C.

(Block) polyisocyanate composition and coating composition using same

Disclosed is a polyisocyanate composition derived from an aliphatic diisocyanate monomer and an alcohol, which satisfies all the conditions below in a state not containing the aliphatic diisocyanate monomer and a solvent. 1) Isocyanurate trimer concentration: 55-95 mass % 2) Number ratio of allophanate groups derived from the alcohol to isocyanurate groups: 1-20% 3) Urethodione dimmer concentration: 2-25 mass % 4) Viscosity at 25&#xb0; C.: 150-800 mPa&#xb7;s.

Highly crosslinkable low-viscosity polyisocyanate composition and coating composition containing same

The present invention provides an aqueous urethane polyol comprising a hydroxyl group, a urethane group and a hydrophilic groups in a molecule, wherein: an average number of hydroxyl group is 3 to 20; a hydroxyl value is 10 to 200 (mg KOH/g); an equivalent ratio of (urethane group)/(hydroxyl group+hydrophilic group) is 1 to 2; and a number average molecular weight is 1,000 to 20,000.

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Tokyo, Japan

Hironori Katagawa