CN105601877A - 一种水性聚氨酯的制备方法 - Google Patents

一种水性聚氨酯的制备方法 Download PDF

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CN105601877A
CN105601877A CN201610187253.3A CN201610187253A CN105601877A CN 105601877 A CN105601877 A CN 105601877A CN 201610187253 A CN201610187253 A CN 201610187253A CN 105601877 A CN105601877 A CN 105601877A
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李水金
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Abstract

本发明公开了一种水性聚氨酯的制备方法，该制备的水性聚氨酯，优化了配方中的各组分，有效提高水性聚氨酯的整体性能，另外加入了适量的纳米纤维素显著地改善了水性聚氨酯薄膜的硬度和力学性能。水性聚氨酯复合薄膜拉伸强度达到26.3MPa，？相对于纯水性聚氨酯膜提高283%。

Description

一种水性聚氨酯的制备方法
技术领域
本发明涉及聚氨酯领域，具体涉及一种水性聚氨酯的制备方法。
背景技术
水性聚氨酯以水替代有机溶剂作为分散介质，除具有溶剂型聚氨酯优异性能外，而且耐油、耐低温、耐屈挠、耐化学品、安全可靠、施工过程不易燃易爆、无毒、无环境污染，产品成功应用于轻纺、皮革、木材加工、建筑、造纸等行业。但是由于水作介质的表面张力太大且热焓高，导致水性聚氨酯成膜与基材复合差，力学性能降低。
发明内容
本发明目的在于，提供一种具有良好力学性能，适应性强，化学稳定性高的水性聚氨酯，本发明所采用的技术方案是：
一种水性聚氨酯的制备方法，其特征在于，由以下步骤制成：
A:在500mL的四口烧瓶中，加入28.14g聚四氢呋喃醚二醇，在磁力搅拌的条件下于110℃抽真空1-1.5h；
B:冷却后，接上冷凝管，在氮气保护下缓慢搅拌，在反应温度下缓慢加入22.23g异氟尔酮二异氰酸酯，反应1h；
C:将2.25g二羟甲基丙酸用小量N-甲基吡咯烷酮溶解后加入四口烧瓶，反应1h；
D:加入3.66g1,4-丁二醇，并滴加4-5滴二月桂酸二丁基锡催化剂，用适量丙酮调节粘度，继续反应4h；
E:降温至40℃后，在快速搅拌的条件下加入1.70g三乙胺中和；
F:降至室温，高速搅拌的条件下，加入纳米纤维素，快速搅拌乳化30min，加入去离子水，继续搅拌后，减压蒸馏回收丙酮，得到水性聚氨酯乳液。
进一步地，所述步骤B的反应温度在58-62℃。
进一步地，所述步骤F中加入的纳米纤维素的质量是水性聚氨酯质量的5%-8%。
进一步地，所述步骤F中的纳米纤维素的长度在0.2-0.3um。
本发明相对于现有技术的有益效果是：本发明的制备的水性聚氨酯，通过优化配方中的各组分，有效提高水性聚氨酯的整体性能，另外加入了适量的纳米纤维素显著地改善了水性聚氨酯薄膜的硬度和力学性能。水性聚氨酯复合薄膜拉伸强度达到26.3MPa，相对于纯水性聚氨酯膜提高283%。
具体实施方式
以下将结合实施例对本发明的构思及产生的技术效果进行清楚、完整地描述，以充分地理解本发明的目的、特征和效果。显然，所描述的实施例只是本发明的一部分实施例，而不是全部实施例，基于本发明的实施例，本领域的技术人员在不付出创造性劳动的前提下所获得的其他实施例，均属于本发明保护的范围。
实施例1：一种水性聚氨酯的制备方法，其特征在于，由以下步骤制成：
A:在500mL的四口烧瓶中，加入28.14g聚四氢呋喃醚二醇，在磁力搅拌的条件下于110℃抽真空1-1.5h；
B:冷却后，接上冷凝管，在氮气保护下缓慢搅拌，在反应温度下缓慢加入22.23g异氟尔酮二异氰酸酯，反应1h；
C:将2.25g二羟甲基丙酸用小量N-甲基吡咯烷酮溶解后加入四口烧瓶，反应1h；
D:加入3.66g1,4-丁二醇，并滴加4-5滴二月桂酸二丁基锡催化剂，用适量丙酮调节粘度，继续反应4h；
E:降温至40℃后，在快速搅拌的条件下加入1.70g三乙胺中和；
F:降至室温，高速搅拌的条件下，加入纳米纤维素，快速搅拌乳化30min，加入去离子水，继续搅拌后，减压蒸馏回收丙酮，得到水性聚氨酯乳液。
其中，上述制备方法步骤B的反应温度在58-62℃。步骤F中加入的纳米纤维素的质量是水性聚氨酯质量的5%-8%。而且步骤F中加入的纳米纤维素的长度在0.2-0.3um。
以上对本发明的较佳实施方式进行了具体说明，但本发明创造并不限于所述实施例，熟悉本领域的技术人员在不违背本发明精神的前提下还可作出种种的等同变型或替换，这些等同的变型或替换均包含在本申请权利要求所限定的范围内。

Claims (4)

1.一种水性聚氨酯的制备方法，其特征在于，由以下步骤制成：
A:在500mL的四口烧瓶中，加入28.14g聚四氢呋喃醚二醇，在磁力搅拌的条件下于110℃抽真空1-1.5h；
B:冷却后，接上冷凝管，在氮气保护下缓慢搅拌，在反应温度下缓慢加入22.23g异氟尔酮二异氰酸酯，反应1h；
C:将2.25g二羟甲基丙酸用小量N-甲基吡咯烷酮溶解后加入四口烧瓶，反应1h；
D:加入3.66g1,4-丁二醇，并滴加4-5滴二月桂酸二丁基锡催化剂，用适量丙酮调节粘度，继续反应4h；
E:降温至40℃后，在快速搅拌的条件下加入1.70g三乙胺中和；
F:降至室温，高速搅拌的条件下，加入纳米纤维素，快速搅拌乳化30min，加入去离子水，继续搅拌后，减压蒸馏回收丙酮，得到水性聚氨酯乳液。
2.根据权利要求1所述的水性聚氨酯的制备方法，其特征在于，所述步骤B的反应温度在58-62℃。
3.根据权利要求1所述的水性聚氨酯的制备方法，其特征在于，所述步骤F中加入的纳米纤维素的质量是水性聚氨酯质量的5%-8%。
4.根据权利要求1所述的水性聚氨酯的制备方法，其特征在于，所述步骤F中的纳米纤维素的长度在0.2-0.3um。
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107325601A (zh) * 2017-06-27 2017-11-07 天长市巨龙车船涂料有限公司 一种耐紫外线防水改性涂料
CN107955363A (zh) * 2017-12-06 2018-04-24 陕西科技大学 一种ZnO@NCC复合粒子改性生物基水性聚氨酯乳液的方法及其产品
CN108102532A (zh) * 2017-12-22 2018-06-01 谢涛 一种透明的在活化期内性能稳定的水性聚氨酯组合物
CN110387028A (zh) * 2019-05-21 2019-10-29 江南大学 一种羧基化纳米纤维素晶须改性水性聚氨酯的制备方法
CN113652008A (zh) * 2021-09-18 2021-11-16 安徽乐朗环保新材料有限公司 一种可降解淀粉塑料组合物及其制备方法和应用

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CN101906201A (zh) * 2010-07-01 2010-12-08 东华大学 一种采用纳米纤维素改性制备聚氨酯整理剂的方法
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CN101906201A (zh) * 2010-07-01 2010-12-08 东华大学 一种采用纳米纤维素改性制备聚氨酯整理剂的方法
CN103320003A (zh) * 2013-07-12 2013-09-25 东北林业大学 一种木材表面纳米纤维素复合水性聚氨酯漆膜的制备方法

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107325601A (zh) * 2017-06-27 2017-11-07 天长市巨龙车船涂料有限公司 一种耐紫外线防水改性涂料
CN107955363A (zh) * 2017-12-06 2018-04-24 陕西科技大学 一种ZnO@NCC复合粒子改性生物基水性聚氨酯乳液的方法及其产品
CN107955363B (zh) * 2017-12-06 2020-10-16 陕西科技大学 一种ZnO/NCC纳米复合粒子改性生物基水性聚氨酯乳液的方法及其产品
CN108102532A (zh) * 2017-12-22 2018-06-01 谢涛 一种透明的在活化期内性能稳定的水性聚氨酯组合物
CN110387028A (zh) * 2019-05-21 2019-10-29 江南大学 一种羧基化纳米纤维素晶须改性水性聚氨酯的制备方法
CN110387028B (zh) * 2019-05-21 2021-12-03 江南大学 一种羧基化纳米纤维素晶须改性水性聚氨酯的制备方法
CN113652008A (zh) * 2021-09-18 2021-11-16 安徽乐朗环保新材料有限公司 一种可降解淀粉塑料组合物及其制备方法和应用

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Application publication date: 20160525