万华MDI-50单体固化剂 高纯度低粘度保温发泡PU胶粘剂交联剂 聚氨酯发泡胶黏剂弹性体
万华 WANNATE? MDI-50 为 4,4'-MDI 与 2,4'-MDI 各占约 50% 的液态混合二苯基甲烷二异氰酸酯,纯度≥99.6%,常温透明低粘液体,无低温结晶困扰,投料加工便捷。产品 NCO 含量充足,反应窗口宽,与溶剂型羟基丙烯酸树脂相容性优异,可常温 / 低温烘烤交联,能显著提升金属板材附着力、漆膜韧性与耐盐雾性能;零自带溶剂,适配低 VOC 涂料配方,可替代 TDI 降低废气污染。广泛用于双组分金属工业漆、聚氨酯胶粘剂、弹性体,国产大厂稳定供货,性价比突出。芳香族体系注意户外长期使用易轻微黄变,严禁与水性体系直接混配,储存需隔绝水汽。
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