POLYURETHANE AND ITS PRODUCTION
    1.
    发明专利

    公开(公告)号:JPH10101758A

    公开(公告)日:1998-04-21

    申请号:JP17844997

    申请日:1997-07-03

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To obtain a polyurethane useful as a material for coating by reacting a specified polyhydric alcohol with an isocyanate. SOLUTION: This polyurethane which is suitable as a material or component of a coating material is obtained by reacting a prepolymer (a) obtained by reacting a polyhydric alcohol having more than one isocyanate-reactive hydroxyl group per molecule with an aromatic or aliphatic polyisocyanate in a ratio of the number of the isocyanatte-reactive hydroxyl groups to the number of the isocyanate groups of below 1 with an isocyanate selected from the group consisting of aromatic or aliphatic polyisocyanates (b) and a chain extender (2) obtained by reacting a polyhydric alcohol (a) with a compound (b) having an epoxy functional group and additionally an alcohol-reactive functional group, a reaction product (b) of the reaction product with an α,β-olefinically unsaturated carboxylic acid, and reacting this reaction product with an amine having a reactive prim. amino group.

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