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发明公开
CN103254397A 一种耐水、耐候聚酯型水性聚氨酯乳液及其制备方法 无效 - 撤回

一种耐水、耐候聚酯型水性聚氨酯乳液及其制备方法
摘要：
本发明涉及一种耐水、耐候聚酯型水性聚氨酯乳液及其制备方法，按质量百分比由以下原料反应而成：聚酯二元醇8.00%～19.00%，二异氰酸酯3.00%～10.00%，催化剂0.02%～0.04%，扩链剂0.70%～1.70%，有机溶剂5.00%～10.00%，有机硅2.00%～12.00%，中和剂0.60%～1.20%，封端剂0.50%～1.60%，去离子水57.00%～65.00%。制备方法：将二异氰酸酯、催化剂和扩链剂加入脱水后的聚酯二元醇中反应，加入有机溶剂和氨基硅油，得有机硅改性接枝聚氨酯；加入封端剂、中和剂和水反应，即得。本发明的物质存储稳定，涂膜具有理想的硬度、粘附力、耐水性和耐候性。
摘要（英）：

The invention relates to a waterproof and weather-resistant polyester-type waterborne polyurethane emulsion and a preparation method thereof. The waterborne polyurethane emulsion is formed by the reaction of the following raw materials by mass percent: 8.00% to 19.00% of polyester glycol, 3.00% to 10.00% of diisocyanate, 0.02% to 0.04% of a catalyst, 0.70% to 1.70% of chain extender, 5.00% to 10.00% of organic solvent, 2.00% to 12.00% of organic silicon, 0.60% to 1.20% of a neutralizing agent, 0.50% to 1.60% of end-capping reagent and 57.00% to 65.00% of deionized water. The preparation method comprises the following steps: adding the diisocyanate, the catalyst and the chain extender into the dehydrated polyester glycol, reacting and adding the organic solvent and amino silicon oil, thereby obtaining organic silicon-modified grafting polyurethane; and then adding the end-capping reagent, the neutralizing agent and the water and reacting, thereby obtaining the waterproof and weather-resistant polyester-type waterborne polyurethane emulsion. The waterborne polyurethane emulsion provided by the invention is stable in material storage; and a coating film formed by the waterborne polyurethane emulsion is ideal in hardness, adhesive power, water resistance and weather resistance.

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