科思创拜耳Desmodur N75固化剂 HDI缩二脲防腐耐黄变耐候双组分 汽车工业漆户外聚氨酯面漆交联剂PU涂料硬化剂
科思创拜耳DesmodurN75 为HDI缩二脲脂肪族固化剂，75%固含PMA 与二甲苯混合溶剂，NCO值16.5%，游离HDI单体含量低，色泽浅、黏度适中。漆膜耐紫外线、长期户外不易黄变，保光保色优异，硬度与柔韧性均衡，耐盐雾、耐水、耐化学品腐蚀。与丙烯酸、聚酯多元醇配伍性极佳，支持常温自干与低温烘烤，广泛用于汽车修补漆、工程机械面漆、轨道交通涂料、户外金属防腐漆与高端耐候塑料涂料。
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