CN106928829A - 一种水性聚氨酯皮革涂饰剂制备方法 - Google Patents

一种水性聚氨酯皮革涂饰剂制备方法 Download PDF

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CN106928829A
CN106928829A CN201710133469.6A CN201710133469A CN106928829A CN 106928829 A CN106928829 A CN 106928829A CN 201710133469 A CN201710133469 A CN 201710133469A CN 106928829 A CN106928829 A CN 106928829A
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王波
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Abstract

本发明公开了一种水性聚氨酯皮革涂饰剂制备方法，包括以下步骤：将聚酯多元醇和聚醚多元醇进行脱水处理后，控制温度在65～80℃加入二异氰酸酯、亲水扩链剂、三羟甲基丙烷(TMP)交联剂和二丁基二月桂酸锡有机锡催化剂，所述的亲水扩链剂为二羟甲基丙酸(DMPA)，控制温度在65～80℃进行预聚反应，直至‑NC浓度达到理论值，得到预聚物；将预聚物用丙酮溶解后，向预聚体中加入去离子水乳化，再加入乙二胺二元胺扩链剂进行进一步的扩链反应20～30min，然后抽真空脱去丙酮得到聚酯聚醚型水性聚氨酯皮革涂饰剂。本方法制备的水性聚氨酯皮革涂饰剂具有拉伸强度高、断裂伸长率高且吸水率低的优点。

Description

一种水性聚氨酯皮革涂饰剂制备方法
技术领域
本发明涉及一种皮革涂饰剂制备方法，具体是一种水性聚氨酯皮革涂饰剂制备方法，属于皮革涂饰剂技术领域。
背景技术
皮革涂饰剂是用于皮革表面涂饰保护和美化皮革的一类皮革助剂的统称，通常由成膜剂、着色材料、溶剂及助剂按照一定比例配制而成，其中成膜物质是皮革涂饰剂的基础；皮革涂饰剂在皮革制造中有非常重要的作用，可以增加皮革美观、延长皮革使用时间、显著提高皮革制品的质量和档次，进而增加皮革制品的商业价值。
水性聚氨酯皮革涂饰剂是以水为分散介质的二元胶体体系，与溶剂型聚氨酯相比，具有无毒、不易燃烧、不污染环境等优点，近年来，随着人们环境意识的增强，水性聚氨酯逐渐成为皮革涂饰剂的主力军。
水性聚氨酯按照原料可分为聚酯型水性聚氨酯和聚醚型水性聚氨酯，利用聚酯多元醇为原料合成的水性聚氨酯皮革涂饰剂涂膜外观好、有较好的力学性能，而其耐水性能较差；采用聚醚多元醇为原料合成水性聚氨酯皮革涂饰剂涂膜柔韧性和耐水性较好，但其力学性能较差。因此，采用聚酯二元醇和聚醚二元醇混合为原料制备水性聚氨酯皮革涂饰剂，可以使二者的优势互补，改善和提高水性聚氨酯皮革涂饰剂的性能。
现有技术中的水性聚氨酯皮革涂饰剂多侧重于针对耐黄性能，而涂饰剂本身的拉伸强度、断裂伸长率等机械性能通常较低，另外，通常无法在保证机械性能的前提下同时实现较高的耐水性能。
发明内容
针对上述现有技术存在的问题，本发明提供一种水性聚氨酯皮革涂饰剂制备方法，能够使水性聚氨酯皮革涂饰剂在实现拉伸强度高、断裂伸长率高的前提下实现较低的吸水率。
为了实现上述目的，本水性聚氨酯皮革涂饰剂制备方法所制备的水性聚氨酯皮革涂饰剂由10～50％的聚酯多元醇、12～60％的聚醚多元醇、68～78％的聚酯多元醇+聚醚多元醇、18～25％的二异氰酸酯、0.2～0.5％的交联剂、2.8～5.8％的亲水扩链剂、0.6～0.9％的二元胺扩链剂、0.03～0.05％的有机锡催化剂组成；
制备方法具体包括以下步骤：
a.将聚酯多元醇和聚醚多元醇进行脱水处理后，控制温度在65～80℃加入二异氰酸酯、亲水扩链剂、三羟甲基丙烷(TMP)交联剂和二丁基二月桂酸锡有机锡催化剂，所述的亲水扩链剂为二羟甲基丙酸(DMPA)或1，2-二羟基-3-丙磺酸钠(DHPA)，控制温度在65～80℃进行预聚反应，直至-NC浓度达到理论值，得到预聚物；
b.将预聚物用丙酮溶解后，向预聚体中加入去离子水乳化，再加入乙二胺二元胺扩链剂进行进一步的扩链反应20～30min，然后抽真空脱去丙酮得到聚酯聚醚型水性聚氨酯皮革涂饰剂。
作为本发明的进一步改进方案，所述的聚酯多元醇为聚己二酸乙二醇。
作为本发明的进一步改进方案，所述的二异氰酸酯为二苯基甲烷二异氰酸酯(MDI)。
作为本发明的进一步改进方案，所述的聚醚多元醇为聚四氢呋喃醚二醇(PTMEG)。
与现有技术相比，本发明的有益效果在于本发明提供了能满足拉伸强度高，断裂伸长率高且吸水率低此三重要求的水性聚氨酯皮革涂饰剂。
具体实施方式
实施例1：在四口烧瓶中投入200g的DP-2000和200g的聚己二酸乙二醇，高温抽真空脱水2h后降温至80℃，然后加入145g的MDI、20g的1，2-二羟基-3-丙磺酸钠、2g的三羟甲基丙烷和4滴二丁基二月桂酸锡，于65～80℃反应至-NCO浓度达到理论值后加入150g丙酮溶解；将预聚体倒入分散釜中降温至30℃、并高速搅拌同时加入500g去离子水后再加入4g乙二胺，高速搅拌20～30min；最后低压抽真空脱丙酮后得到水性聚氨酯乳液。
得到的水性聚氨酯乳液进行测试，拉伸强度：40.5MPa；断裂伸长率：500％；吸水率：12.9％。
实施例2：在四口烧瓶中投入50g的DP-2000和300g的聚己二酸乙二醇，高温抽真空脱水2h后降温至80℃，然后加入145g的MDI、20g的1，2-二羟基-3-丙磺酸钠、2g的三羟甲基丙烷和4滴二丁基二月桂酸锡，于65～80℃反应至-NCO浓度达到理论值后加入150g丙酮溶解；将预聚体倒入分散釜中降温至30℃、并高速搅拌同时加入500g去离子水后再加入4g乙二胺，高速搅拌20～30min；最后低压抽真空脱丙酮后得到水性聚氨酯乳液。
得到的水性聚氨酯乳液进行测试，拉伸强度：50.5MPa；断裂伸长率：590％；吸水率：15.5％。
实施例3：在四口烧瓶中投入300g的DP-2000和100g的聚己二酸乙二醇，高温抽真空脱水2h后降温至80℃，然后加入145g的MDI、20g的1，2-二羟基-3-丙磺酸钠、2g的三羟甲基丙烷和4滴二丁基二月桂酸锡，于65～80℃反应至-NCO浓度达到理论值后加入150g丙酮溶解；将预聚体倒入分散釜中降温至30℃、并高速搅拌同时加入500g去离子水后再加入4g乙二胺，高速搅拌20～30min；最后低压抽真空脱丙酮后得到水性聚氨酯乳液。
得到的水性聚氨酯乳液进行测试，拉伸强度：35.9MPa；断裂伸长率：550％；吸水率：11.5％。
实施例4：在四口烧瓶中投入350g的DP-2000和50g的聚己二酸乙二醇，高温抽真空脱水2h后降温至80℃，然后加入145g的MDI、20g的1，2-二羟基-3-丙磺酸钠、2g的三羟甲基丙烷和4滴二丁基二月桂酸锡，于65～80℃反应至-NCO浓度达到理论值后加入150g丙酮溶解；将预聚体倒入分散釜中降温至30℃、并高速搅拌同时加入500g去离子水后再加入4g乙二胺，高速搅拌20～30min；最后低压抽真空脱丙酮后得到水性聚氨酯乳液。
得到的水性聚氨酯乳液进行测试，拉伸强度：26.9MPa；断裂伸长率：650％；吸水率：9.5％。
实施例5：在四口烧瓶中投入100g的DP-2000和300g的聚己二酸乙二醇，高温抽真空脱水2h后降温至80℃，然后加入145g的MDI、20g的1，2-二羟基-3-丙磺酸钠、2g的三羟甲基丙烷和4滴二丁基二月桂酸锡，于65～80℃反应至-NCO浓度达到理论值后加入150g丙酮溶解；将预聚体倒入分散釜中降温至30℃、并高速搅拌同时加入500g去离子水后再加入4g乙二胺，高速搅拌20～30min；最后低压抽真空脱丙酮后得到水性聚氨酯乳液。
得到的水性聚氨酯乳液进行测试，拉伸强度：47.9MPa；断裂伸长率：360％；吸水率：14.5％。

Claims (4)

1.一种水性聚氨酯皮革涂饰剂制备方法，所制备的水性聚氨酯皮革涂饰剂由10～50％的聚酯多元醇、12～60％的聚醚多元醇、68～78％的聚酯多元醇+聚醚多元醇、18～25％的二异氰酸酯、0.2～0.5％的交联剂、2.8～5.8％的亲水扩链剂、0.6～0.9％的二元胺扩链剂、0.03～0.05％的有机锡催化剂组成；
其特征在于，制备方法具体包括以下步骤：
a.将聚酯多元醇和聚醚多元醇进行脱水处理后，控制温度在65～80℃加入二异氰酸酯、亲水扩链剂、三羟甲基丙烷(TMP)交联剂和二丁基二月桂酸锡有机锡催化剂，所述的亲水扩链剂为二羟甲基丙酸(DMPA)或1，2-二羟基-3-丙磺酸钠(DHPA)，控制温度在65～80℃进行预聚反应，直至-NC浓度达到理论值，得到预聚物；
b.将预聚物用丙酮溶解后，向预聚体中加入去离子水乳化，再加入乙二胺二元胺扩链剂进行进一步的扩链反应20～30min，然后抽真空脱去丙酮得到聚酯聚醚型水性聚氨酯皮革涂饰剂。
2.根据权利要求1所述的一种水性聚氨酯皮革涂饰剂制备方法，其特征在于，所述的聚酯多元醇为聚己二酸乙二醇。
3.根据权利要求1所述的一种水性聚氨酯皮革涂饰剂制备方法，其特征在于，所述的二异氰酸酯为二苯基甲烷二异氰酸酯(MDI)。
4.根据权利要求1所述的一种水性聚氨酯皮革涂饰剂制备方法，其特征在于，所述的聚醚多元醇为聚四氢呋喃醚二醇(PTMEG)。
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Cited By (2)

* Cited by examiner, † Cited by third party
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CN112062925A (zh) * 2020-09-08 2020-12-11 清远市腾翔皮革有限公司 一种皮革表面防水用料及其制备方法
CN114437307A (zh) * 2020-10-30 2022-05-06 长兴化学工业(中国)有限公司 水性聚氨酯分散体、涂料组合物及其应用

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112062925A (zh) * 2020-09-08 2020-12-11 清远市腾翔皮革有限公司 一种皮革表面防水用料及其制备方法
CN114437307A (zh) * 2020-10-30 2022-05-06 长兴化学工业(中国)有限公司 水性聚氨酯分散体、涂料组合物及其应用
CN114437307B (zh) * 2020-10-30 2024-01-26 长兴化学工业(中国)有限公司 水性聚氨酯分散体、涂料组合物及其应用

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