CN105968313A - 一种pet薄膜用高粘结水性聚氨酯树脂的制备方法 - Google Patents

一种pet薄膜用高粘结水性聚氨酯树脂的制备方法 Download PDF

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CN105968313A
CN105968313A CN201610512049.4A CN201610512049A CN105968313A CN 105968313 A CN105968313 A CN 105968313A CN 201610512049 A CN201610512049 A CN 201610512049A CN 105968313 A CN105968313 A CN 105968313A
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刘都宝
陶杰
刘藏
鲍俊杰
赵洪涛
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Abstract

一种PET用高粘结水性聚氨酯树脂的制备方法，是将30～45摩尔份脂肪族异氰酸酯、5～10摩尔份聚酯多元醇、5～15摩尔份聚醚多元醇和1～5摩尔份含氟多元醇溶于丙酮中，70～90 ℃反应1.5～3 h后，得到预聚体；再升温至70～75 ℃，加入1～5摩尔份二羟甲基丙酸和1～5摩尔份乙二醇，扩链反应0.5～1.0 h，降至室温后，在高速搅拌下加入2～5摩尔份三乙胺，加水乳化，减压蒸馏脱去丙酮，得到PET用高粘结水性聚氨酯树脂。本发明在水性聚氨酯树脂中引入氟官能团，增加了水性聚氨酯树脂和PET薄膜的附着力，用于PET薄膜材料表面，具有无毒、成膜性好、高粘结力和高附着力等优点，成功地解决了水性聚氨酯油墨和水性聚氨酯粘胶剂在PET薄膜上的粘结附着问题。

Description

一种PET薄膜用高粘结水性聚氨酯树脂的制备方法
技术领域
本发明属于水性聚氨酯技术领域，具体地说是一种PET薄膜用高粘结水性聚氨酯树脂的制备方法。
背景技术
PET聚酯薄膜因为其优异的耐温性、耐久性、耐溶剂性和高透明度得到了日益广泛的使用。但是，PET薄膜属于非吸收性承印材料，表面张力比较低， 油墨和粘胶剂常常不能同PET底材有效结合，易引起脱墨或脱胶，影响产品质量。虽然电晕处理能够提高PET薄膜的表面张力，但电晕处理过的材料表面张力稳定性差，且某些PET薄膜无法用电晕处理。因此，包装和印刷工业一直在寻找一个高效、稳定的PET薄膜表面附着力解决方案。同时，随着社会大众对绿色健康的需求日益高涨及国家环保法规的日益严苛，水性油墨和水性粘合剂的使用已成为必然趋势。水性聚氨酯具有环保、无毒、成膜性能优异等特点，广泛应用于涂料、油墨、粘合剂等领域。但用于未经电晕处理的PET材料表面时，水性聚氨酯的粘结力和附着力较差，从而限制了水性聚氨酯在PET材料上的应用。
发明内容
本发明的目的在于提供一种PET薄膜用高粘结水性聚氨酯树脂的制备方法，该方法制备的水性聚氨酯树脂在用于PET薄膜表面，具有无毒、不含重金属、高粘结和高附着力等优点，成功地解决了水性聚氨酯油墨和水性聚氨酯粘胶剂在PET聚酯薄膜上的粘结附着问题。
为实现上述目的，本发明提供了一种PET薄膜用高粘结水性聚氨酯树脂的制备方法，包括以下步骤：
（1）将30～45摩尔份脂肪族异氰酸酯、5～10摩尔份聚酯多元醇、5～15摩尔份聚醚多元醇和1～5摩尔份含氟多元醇溶于15～40摩尔份丙酮中，升温至70～90 ℃，反应1.5～3 h后，得到预聚体；
（2）将步骤（1）得到的预聚体升温至70～75 ℃，然后加入1～5摩尔份二羟甲基丙酸和1～5摩尔份乙二醇，扩链反应0.5～1.0 h；
（3）降至室温后，在高速搅拌下加入2～5摩尔份三乙胺，加水乳化，减压蒸馏脱去丙酮，得到PET薄膜用高粘结水性聚氨酯树脂。
所述的脂肪族异氰酸酯是六亚甲基二异氰酸酯或异佛尔酮二异氰酸酯；聚酯多元醇是分子量为2000～2500的聚酯二元醇（CAS：68082-28-0），所述的聚醚多元醇是聚醚二元醇，含氟多元醇是含氟二元醇（DAF）、含氟聚醚二元醇或全氟烷基醇（FOH）。
本发明在水性聚氨酯树脂中引入特殊的官能团（—F），增加了水性聚氨酯树脂和PET薄膜的附着力，用于PET薄膜材料表面，具有无毒、成膜性好、高粘结力和高附着力等优点，成功地解决了水性聚氨酯油墨和水性聚氨酯粘胶剂在PET聚酯薄膜上的粘结附着问题。
具体实施方式
以下结合实施例进一步说明发明。
实施例1
PET薄膜用高粘结水性聚氨酯树脂的制备方法，包括以下步骤：
（1）将30 mol异佛尔酮二异氰酸酯、5 mol分子量为2000～2500的聚酯二元醇、10 mol聚醚二元醇和1 mol含氟二元醇溶于25 mol丙酮中，升温至70 ℃，反应3 h后，得到预聚体；
（2）将步骤（1）得到的预聚升温至75 ℃，然后加入2 mol二羟甲基丙酸和2 mol乙二醇，扩链反应0.5 h；
（3）降至室温后，在高速搅拌下加入2 mol三乙胺，加水乳化后减压蒸馏脱去丙酮，得到PET用高粘结水性聚氨酯树脂。
实施例2
PET薄膜用高粘结水性聚氨酯树脂的制备方法，包括以下步骤：
（1）将40 mol六亚甲基二异氰酸酯、10 mol分子量为2000～2500的聚酯二元醇、5 mol聚醚二元醇和3 mol含氟聚醚二元醇溶于30mol丙酮中，升温至90 ℃，反应1.5 h后，得到预聚体；
（2）将步骤（1）得到的预聚体降温至70 ℃，然后加入5mol二羟甲基丙酸和1mol乙二醇，扩链反应1.0 h；
（3）降至室温后，在高速搅拌下加入5 mol三乙胺，加水乳化后减压蒸馏脱去丙酮，得到PET用高粘结水性聚氨酯树脂。
实施例3
PET薄膜用高粘结水性聚氨酯树脂的制备方法，包括以下步骤：
（1）将45 mol异佛尔酮二异氰酸酯、5 mol分子量为2000～2500的聚酯二元醇、10 mol聚醚二元醇和5 mol全氟烷基醇溶于40 mol丙酮中，升温至75 ℃，反应2.5 h后，得到预聚体；
（2）将步骤（1）得到的预聚降温至75 ℃，然后加入3 mol二羟甲基丙酸和5 mol乙二醇，扩链反应1 h；
（3）降至室温后，在高速搅拌下加入3 mol三乙胺，加水乳化后减压蒸馏脱去丙酮，得到PET薄膜用高粘结水性聚氨酯树脂。
按照GB-T7124-2008 胶粘剂拉伸剪切强度的测定方法对实施例1～3制得的PET薄膜用高粘结水性聚氨酯树脂进行测试，并测试实施例1～3制得的PET用高粘结水性聚氨酯树脂对PET薄膜自身粘结性能，结果表1所示：
表1 实施例1～3制得的PET薄膜高粘结水性聚氨酯树脂的拉伸强度和断裂力测试结果：
实施例 拉伸强度/MPa 断裂力/N
1 32.30 26.25
2 40.98 31.65
3 45.36 34.27
结果表明本发明制备的水性聚氨酯树脂与PET薄膜的粘结力较强（断裂力≥26.25 N），而且具有较好的成模性（拉伸强度≥32.30 MPa），成功地解决了水性聚氨酯油墨和水性聚氨酯粘胶剂在PET聚酯薄膜上的粘结附着问题。

Claims (2)

1.一种PET薄膜用高粘结水性聚氨酯树脂的制备方法，其特征在于，包括以下步骤：
（1）将30～45摩尔份脂肪族异氰酸酯、5～10摩尔份聚酯多元醇、5～15摩尔份聚醚多元醇和1～5摩尔份含氟多元醇溶于15～40摩尔份丙酮中，升温至70～90 ℃，反应1.5～3 h后，得到预聚体；
（2）将步骤（1）得到的预聚体升温至70～75 ℃，然后加入1～5摩尔份二羟甲基丙酸和1～5摩尔份乙二醇，扩链反应0.5～1.0 h；
（3）降至室温后，在高速搅拌下加入2～5摩尔份三乙胺，加水乳化，减压蒸馏脱去丙酮，得到PET薄膜用高粘结水性聚氨酯树脂。
2.根据权利要求1所述的PET薄膜用高粘结水性聚氨酯树脂的制备方法，其特征在于：所述的脂肪族异氰酸酯是六亚甲基二异氰酸酯或异佛尔酮二异氰酸酯；聚酯多元醇是分子量为2000～2500的聚酯二元醇，所述的聚醚多元醇是聚醚二元醇，含氟多元醇是含氟二元醇、含氟聚醚二元醇或全氟烷基醇。
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Cited By (5)

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CN106554712A (zh) * 2016-11-15 2017-04-05 汕头市鑫源化工科技有限公司 一种转移膜的制作方法
CN106700883A (zh) * 2016-11-15 2017-05-24 汕头市鑫源化工科技有限公司 一种信息涂料及其制备方法
CN110845921A (zh) * 2019-11-21 2020-02-28 深圳市高域化学材料有限公司 一种塑胶用水性高性能涂料
CN111808257A (zh) * 2020-06-16 2020-10-23 合肥科天水性科技有限责任公司 含氟改性室温磷光生物基水性聚氨酯的制备方法和用途
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Application publication date: 20160928