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Preparation and Film Properties of Aliphatic Polycarbonate-Containing Polyisocyanate
Author(s): Liao Yu, Lv Xiayang, Li Huining, Cao Derong
Pages: 16-
19
Year: 2013
Issue:
5
Journal: Polyurethane Industry
Keyword: water-dispersible polyisocyanate; polycarbonate diols; waterborne silicon-containing acrylic resin;
Abstract: 采用脂肪族聚碳酸酯二元醇(APC)和三羟甲基丙烷(TMP)组成的混合多元醇与甲苯二异氰酸酯(TDI)反应,合成了可水分散的多异氰酸酯固化剂(WDLCP),并与硅改性的水性丙烯酸树脂(WSA)配制成水性聚氨酯-硅改性水性丙烯酸酯(PUA)水性清漆.考察了混合多元醇中nOH(TMP)∶noH(APC)对WDLCP在WSA中的分散性能及成膜性能的影响,并与采用聚醚多元醇(PE2000)合成的多异氰酸酯固化剂(WDP)成膜后性能进行对比.结果表明,WDLCP与WSA具有良好的相容性,当nOH(TMP)∶nOH(APC) =0.5∶0.5时,PUA的成膜性较好,相较于WDP,WDLCP合成的涂料的涂膜性能大幅提升.
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