| 摘要 |
This invention relates to a novel polyaldimine, preparation process of the polyaldimine, moisture curable polyurethane composition containing the polyaldimine and use of the composition. The polyaldimine of this invention is represented by the formula (I), (I) ¢wherein R1, R2 and R3 may be the same or different and are halogen, hydrogen, alkoxy having 1 to 4 carbon atoms or alkyl having 1 to 5 carbon atoms; R4 is hydrogen or methyl; Y is -N=CH-C(R5)3 or -N=CH-C(CH3)2-CH2-O-CO-R6 (wherein R5 is an alkyl group having 1 to 4 carbon atoms, R6 is alkyl having 1 to 16 carbon atoms, anilino, benzylamino or alkylamino having 1 to 16 carbon atoms); ? is an integer of 1 or 2: m is an integer of 1 to 3; and n is an integer of 0 to 300!. The polyaldimine is prepared by condensation of the corresponding aromatic polyamine and aldehyde. A moisture curable polyurethane composition is prepared from the above polyaldimine and an organic polyisocyanate. Sealing materials, wall covering materials, water proof materials and flooring materials can be prepared by blending a thiotropic agent or a filler with the polyurethane composition. These materials have very good storage stability and are rapidly cured by atmospheric moisture and cured polyurethane resin having excellent properties can be obtained.
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