Water base block polyurethane, its preparing method and water-proof, heat insulation and wet permeable material made thereof

Abstract

The present invention features that the water base block polyurethane is prepared with component A as soft phase block prepolymer and component B as hard phase block prepolymer through further reaction in water. The component A is prepared with catalyst, polyether or polyester diol, aromatic or fatty diisocyanate, and chain expander short-chain fatty diol in certain proportion; and the component B is prepared with aromatic diisocyanate, cross-linking agent trihydroxyl polyol, chain expander short-chain fatty diol, hydroxyl radical containing short-chain fatty diol and neutralizer short-chain fatty organic butyl amine in certain proportion. The present invention also provides waterproof, heat insulating and moisture permeating material with the polyurethane. 本发明提供一种水基嵌段聚氨酯及其制备方法，其特征在于它含有由用于形成软段相的(A)组组分的反应产物与用于形成硬段相的(B)组组分的反应产物所形成的预聚物在水中继续反应所得的聚合物。(A)：催化剂0.01-0.2重量份；聚醚或聚酯二元醇30-100重量份；芳香族或脂肪族二异氰酸酯5-30重量份；扩链剂短链脂肪族二元醇2-10重量份；(B)：芳香族二异氰酸酯5-20重量份；交联剂三羟基多元醇0.1-2.0重量份；扩链剂短链脂肪族二元醇2-10重量份；含羧基的短链脂肪族二元醇2-10重量份；短链脂肪族有机叔胺类中和剂2-10重量份。本发明还提供通过施用所述聚氨酯所得的具有防水、保暖、透湿性的材料。