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    • 18. 发明公开
    • 3급 카르바메이트 결합을 갖는 히드록실 관능성 우레탄
    • 具有苛性碳酸酯键的羟基官能团
    • KR1020020008058A
    • 2002-01-29
    • KR1020010043084
    • 2001-07-18
    • 이 아이 듀폰 디 네모아 앤드 캄파니
    • 휘브렛츠,요셉
    • C08G18/38C07C211/00C08G18/72
    • C09D175/04C07C271/16C08G18/10C08G18/3831C08G18/44C08G18/4854C08G18/792
    • PURPOSE: Provided are a method for preparing highly branched hydroxy functional urethane adducts with a controlled molecular weight distribution and essentially free from primary carbamate and urea groups, and coating compositions with a good combination of low solution viscosity (low VOC), excellent chemical resistance, mechanical properties and outdoor durability. CONSTITUTION: The hydroxy functional urethane compound comprises the reaction product of: a) a hydroxy functional urethane intermediate containing a tertiary carbamate group prepared by reaction of a cyclic 5-ring carbonate with a beta-hydroxy functional, secondary amine, said intermediate represented by the formula: wherein R1 and R2 = hydrogen, alkyl, cycloalkyl or a residue R6-O- or R6-CO-O-; R6 = an alkyl, cycloalkyl or benzylic group having up to 18 carbon atoms; R4 and R5 = hydrogen or alkyl group containing eventually a hydroxyl group; and R3 = alkyl, cycloalkyl or benzylic group eventually containing an ether linkage and/or a hydroxyl group, or HO-CH(R1)-CH(R2)-; with b) a compound having at least 2 isocyanate groups.
    • 目的:提供具有受控分子量分布且基本上不含伯氨基甲酸酯和脲基团的高度支化的羟基官能氨基甲酸酯加合物的方法,以及具有低溶液粘度(低VOC),优异的耐化学性, 机械性能和户外耐久性。 构成:羟基官能化氨基甲酸酯化合物包括以下物质的反应产物:a)含有通过环状5-环碳酸酯与β-羟基官能的仲胺反应制备的叔氨基甲酸酯基的羟基官能氨基甲酸酯中间体,所述中间体由 式:其中R 1和R 2 =氢,烷基,环烷基或残基R6-O-或R6-CO-O-; R6 =具有至多18个碳原子的烷基,环烷基或苄基; R4和R5 =氢或最终含有羟基的烷基; 和R3 =最终含有醚键和/或羟基的烷基,环烷基或苄基,或HO-CH(R 1)-CH(R 2) - ; 其中b)具有至少2个异氰酸酯基团的化合物。