POLYURETHANE RESIN FORMING COMPOSITION, AND WATER-SEALING MATERIAL FOR STEEL SHEET PILES

WIPO Patent Application WO/2011/061908

A1

Provided is a polyurethane resin forming composition which exhibits excellent curability, heat resistance, water-swelling/water-sealing properties, and easy handling properties when used as a water-swelling/water-sealing material. Also provided is a water-sealing material for steel sheet piles using said polyurethane resin forming composition. Said polyurethane resin forming composition is characterized in that a polyurethane resin is obtained by reacting, at a combination ratio of 2:1 to 8:1 (isocyanate group: hydroxyl group), a prepolymer (A) having isocyanate groups at both terminals, the content of the isocyanate group being 0.5 to 15 mass%, with an amine polyol (B) having a nominal average functionality of 3 to 6, wherein the prepolymer (A) having isocyanate groups at both terminals comprises an organic polyisocyanate (a1) and a polyether polyol (a2) containing 50 to 100 mass% of an oxyethylene group.

HIGASHIKUBO, Ichiro (Ltd. Central Research Laboratory440,Akiba-cho,Totsuka-ku, Yokohama-sh, Kanagawa 52, 〒2450052, JP)
東久保　一郎 (〒52 神奈川県横浜市戸塚区秋葉町４４０番地　日本ポリウレタン工業株式会社総合技術研究所内 Kanagawa, 〒2450052, JP)

JP2010/006642

May 26, 2011

November 11, 2010

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NIPPON POLYURETHANE INDUSTRY CO.,LTD. (1-23, Shiba-4-Chome Minato-K, Tokyo 14, 〒1080014, JP)
日本ポリウレタン工業株式会社 (〒14 東京都港区芝四丁目１番２３号 Tokyo, 〒1080014, JP)
HIGASHIKUBO, Ichiro (Ltd. Central Research Laboratory440,Akiba-cho,Totsuka-ku, Yokohama-sh, Kanagawa 52, 〒2450052, JP)

C08G18/10; C08G18/48; C09K3/10; E02D5/14

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