CN104892891B - 高耐醇性、耐黄变的水性聚氨酯分散乳液及其制备方法 - Google Patents

高耐醇性、耐黄变的水性聚氨酯分散乳液及其制备方法 Download PDF

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CN104892891B
CN104892891B CN201510358925.8A CN201510358925A CN104892891B CN 104892891 B CN104892891 B CN 104892891B CN 201510358925 A CN201510358925 A CN 201510358925A CN 104892891 B CN104892891 B CN 104892891B
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耿佃勇
荆晓东
刘俊哲
孙言丛
董伟
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Abstract

本发明属于聚氨酯技术领域，具体涉及一种高耐醇性、耐黄变性的水性聚氨酯分散乳液及其制备方法。所述的水性聚氨酯分散乳液由以下重量份数的原料制成：聚醚多元醇100～200份；聚四亚甲基醚二醇100～200份；异氰酸酯5～20份；扩链剂10～45份；2,2‑二羟甲基丙酸10～50份；三羟甲基丙烷3～8份；三乙胺5～20份；纯水45～100份。本发明的水性聚氨酯分散乳液通过对其改性提高了耐醇性能，耐黄变性能，其综合性能优异，安全环保，能够用于耐黄变的木器漆、织物整理、户外装饰领域。本发明的制备方法简单易行，易于实现。

Description

高耐醇性、耐黄变的水性聚氨酯分散乳液及其制备方法
技术领域
本发明属于聚氨酯技术领域，具体涉及一种高耐醇性、耐黄变性的水性聚氨酯分散乳液及其制备方法。
背景技术
水性聚氨酯是一种聚氨酯粒子分散于水中的二元胶体体系。水性聚氨酯以水为介质，具有安全、不燃烧、无公害的独特优点。在某些国家水性聚氨酯广泛用作涂料、粘合剂、皮革涂饰剂、纺织助剂、造纸工业助剂和电子材料等领域，而且其应用领域还在不断扩大。由于水性聚氨酯胶黏剂的综合性能优越，近年来受到国内外广泛关注，高性能水性聚氨酯胶黏剂的开发研究已成为热点课题。
众所周知，芳香族异氰酸酯制备的聚氨酯易泛黄，不满足清漆、白漆、户外装饰等领域的要求，需用耐黄变的脂肪族多异氰酸酯制备。但由脂肪族多异氰酸酯制备的聚氨酯涂膜硬度低，耐水耐醇性不好。因此，亟需开发一种高耐醇性、耐黄变的水性聚氨酯分散乳液。
发明内容
本发明的目的是提供一种高耐醇性、耐黄变、安全环保的水性聚氨酯分散乳液；本发明同时提供其制备方法。
本发明所述的高耐醇性、耐黄变的水性聚氨酯分散乳液，由以下重量份数的原料制成：
所述的聚醚多元醇以乙二醇或丙二醇为起始剂，与环氧丙烷反应制得，其分子量为1000～3000，羟值为35～120。
所述的异氰酸酯为异佛尔酮二异氰酸酯(IPDI)。
所述的扩链剂为乙二胺(EDA)。
所述的耐醇性、耐黄变的水性聚氨酯分散乳液的制备方法，包括以下步骤：
(1)将聚醚多元醇和聚四亚甲基醚二醇混合均匀并脱水；
(2)脱水后与异氰酸酯反应，制得预聚物；
(3)加入扩链剂和2,2-二羟甲基丙酸反应，制得预聚体；
(4)加入三羟甲基丙烷改性，制得改性预聚体；
(5)将改性预聚体加入溶有三乙胺的水中分散，中和乳化，得到高耐醇性、耐黄变的水性聚氨酯分散乳液。
本发明的有益效果如下：
本发明的水性聚氨酯分散乳液通过对其改性提高了耐醇性能，耐黄变性能，其综合性能优异，安全环保，能够用于耐黄变的木器漆、织物整理、户外装饰领域。本发明的制备方法简单易行，易于实现。
具体实施方式
以下结合实施例对本发明做进一步描述。
实施例1
本实施例的高耐醇性、耐黄变的水性聚氨酯分散乳液，由以下重量份数的原料制成：
实施例中的聚醚多元醇以乙二醇为起始剂，与环氧丙烷反应制得，其分子量为2000，羟值为56。
所述的耐醇性、耐黄变的水性聚氨酯分散乳液的制备方法如下：
(1)将聚醚多元醇和聚四亚甲基醚二醇混合均匀并脱水；
(2)脱水后与异氰酸酯反应，制得预聚物；
(3)加入扩链剂和2,2-二羟甲基丙酸反应，制得预聚体；
(4)加入三羟甲基丙烷改性，制得改性预聚体；
(5)将改性预聚体加入溶有三乙胺的水中分散，中和乳化，得到高耐醇性、耐黄变的水性聚氨酯分散乳液。
实施例2
本实施例的高耐醇性、耐黄变的水性聚氨酯分散乳液，由以下重量份数的原料制成：
实施例中的聚醚多元醇以丙二醇为起始剂，与环氧丙烷反应制得，其分子量为2000，羟值为56。
本实施例制备方法如实施例1。
实施例3
本实施例的高耐醇性、耐黄变的水性聚氨酯分散乳液，由以下重量份数的原料制成：
实施例中的聚醚多元醇以丙二醇为起始剂，与环氧丙烷反应制得，其分子量为2000，羟值为56。
本实施例制备方法如实施例1。

Claims (1)

1.一种高耐醇性、耐黄变的水性聚氨酯分散乳液，其特征在于由以下重量份数的原料制成：
其中，所述聚醚多元醇以丙二醇为起始剂，与环氧丙烷反应制得，其分子量为2000，羟值为56；
制备方法包括以下步骤：
(1)将聚醚多元醇和聚四亚甲基醚二醇混合均匀并脱水；
(2)脱水后与异氰酸酯反应，制得预聚物；
(3)加入扩链剂和2,2-二羟甲基丙酸反应，制得预聚体；
(4)加入三羟甲基丙烷改性，制得改性预聚体；
(5)将改性预聚体加入溶有三乙胺的水中分散，中和乳化，得到高耐醇性、耐黄变的水性聚氨酯分散乳液。
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CN105384907A (zh) * 2015-11-09 2016-03-09 淄博德信联邦化学工业有限公司 低味低毒塑胶地板弹性层乳液及其制备工艺
CN106188476A (zh) * 2016-07-21 2016-12-07 淄博德信联邦化学工业有限公司 油墨用水性聚氨酯及其制备方法
CN106244744B (zh) * 2016-08-22 2018-06-29 福建隆上超纤有限公司 一种用于皮革的改性涂饰剂及其制备方法
CN107177029A (zh) * 2017-06-29 2017-09-19 宝鸡文理学院 一种金属漆用介孔分子筛/水性聚氨酯复合乳液的制备方法
CN107936222A (zh) * 2017-12-04 2018-04-20 安徽精致汽车饰件有限公司 一种延缓皮革汽车装饰件老化黄变速度的方法
CN111978851A (zh) * 2020-08-31 2020-11-24 荆晓东 耐高温耐水的水性聚氨酯涂料及其制备方法

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