CN110643231A - 一种增强柔性玻璃基材表面附着力的预涂液及其应用方法 - Google Patents

一种增强柔性玻璃基材表面附着力的预涂液及其应用方法 Download PDF

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CN110643231A
CN110643231A CN201910976101.5A CN201910976101A CN110643231A CN 110643231 A CN110643231 A CN 110643231A CN 201910976101 A CN201910976101 A CN 201910976101A CN 110643231 A CN110643231 A CN 110643231A
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曾金栋
陆留斌
林海
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Abstract

本发明属于柔性玻璃技术领域,具体涉及一种增强柔性玻璃基材表面附着力的预涂液及其应用方法,预涂液由如下重量份的各组分组成:多羟基聚合物10‑90份、硅烷偶联剂0‑20份、无机溶胶10‑90份、溶剂500‑2000份。本发明中的多羟基聚合物和无机溶胶中都含有大量羟基,可以与柔性玻璃基材之间形成牢固的氢键,固化后,预涂层表面仍然能够保留一定数量的羟基,有助于增加预涂层与UV硬化层之间的附着力,从而提高UV硬化层与柔性玻璃基材之间的结合力,有效提高柔性玻璃硬化膜的综合形成,延长使用寿命;在柔性玻璃基材与UV硬化层之间增加预涂层,可在保证总的涂层厚度前提下减小UV硬化层厚度,不仅能有效避免UV硬化层过厚而容易开裂的问题,还可以达到保护和防飞溅效果。

Description

一种增强柔性玻璃基材表面附着力的预涂液及其应用方法
技术领域
本发明属于柔性玻璃技术领域,具体涉及一种增强柔性玻璃基材表面附着力的预涂液及其应用方法。
背景技术
近年来,随着电子信息产业及其原材料行业的蓬勃发展,柔性可折叠手机和其它柔性电子设备成为产业界研发的重点。这就要求其盖板玻璃能够到达可折叠的要求,玻璃厚度必须降低至100μm以下,成为可弯折、柔韧性好的柔性玻璃,如此薄的柔性玻璃难以抵挡外力冲击,易碎易飞溅的特点,因此,必须得到有效的保护。
目前的保护方法是在柔性玻璃表面涂覆一层硬化涂层,获得柔性玻璃硬化膜,为达到保护和防飞溅效果,硬化涂层的厚度一般需要大于20-35μm。但是,一般用于手机屏幕保护的UV硬化涂层通常在玻璃上附着困难,而且涂层厚度越大越易开裂,从而使UV硬化涂层无法在柔性玻璃上得到更好的应用。而传统的热固化涂料存在固化时间长、浪费能源等问题。因此,有必要开发一种预涂液,提高柔性玻璃与UV硬化涂层之间的附着力,使UV硬化涂层可以更好地应用到对柔性玻璃的保护和防飞溅中。
发明内容
为了解决UV硬化层在柔性玻璃表面附着力差的问题,本发明公开了一种增强柔性玻璃基材表面附着力的预涂液及其应用方法,该预涂液可以有效增强柔性玻璃基材表面的附着力,使UV硬化层牢固地结合在柔性玻璃基材表面,长期使用后仍能保持良好的附着力,有效改善柔性玻璃硬化膜的综合性能,延长使用寿命。
为了实现上述目的,本发明采用如下技术方案:
一种增强柔性玻璃基材表面附着力的预涂液,由如下重量份的各组分组成:
Figure BDA0002233684290000011
作为优选,上述多羟基聚合物为纤维素、淀粉、聚乙烯醇、聚乙烯醇缩甲醛中的一种或几种。
作为优选,上述硅烷偶联剂为具有环氧基的硅烷偶联剂、具有氨基的硅烷偶联剂、具有双键的硅烷偶联剂中的一种或几种。
作为优选,上述硅烷偶联剂为γ-缩水甘油醚氧丙基三甲氧基硅烷、氨丙基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷中的一种或几种。
作为优选,上述无机溶胶为硅溶胶、铝溶胶中的一种或两种;所述无机溶胶的粒径为2-50nm。
作为优选,上述溶剂为醇类、水或醇水混合物。
作为优选,上述增强柔性玻璃基材表面附着力的预涂液,由如下方法制备而成:按比例称取各组分,将多羟基聚合物、硅烷偶联剂和无机溶胶加入溶剂中,加热到40-90℃,搅拌均匀即得预涂液。
一种增强柔性玻璃基材表面附着力的预涂液的应用方法,包括如下步骤:
(1)将预涂液均匀涂布到柔性玻璃上,热固化得到预涂层;
(2)在预涂层表面均匀涂布一层UV硬化液,固化得到UV硬化层,待UV硬化层冷却后贴合保护膜即可。
作为优选,上述步骤(1)中的热固化温度为80-200℃,时间为1-30min。
作为优选,上述预涂层的厚度为0.5-35μm,所述UV硬化层的厚度为2-35μm。
本发明具有如下的有益效果:
(1)本发明的预涂液所添加的多羟基聚合物和无机溶胶中都含有大量羟基,可以与柔性玻璃基材之间形成牢固的氢键,固化后,预涂层表面仍然能够保留一定数量的羟基,有助于增加预涂层与UV硬化层之间的附着力,从而提高UV硬化层与柔性玻璃基材之间的结合力,有效提高柔性玻璃硬化膜的综合形成,延长使用寿命;
(2)所添加的硅烷偶联剂水解后可以与无机溶胶中的溶胶粒子键合,一方面,键合后得到较大的结构,可以产生较大的空间位阻,利于将溶胶粒子分散开来,另一方面,键合后的结构中既含有极性的羟基等基团,也含有非极性的烃基等基团,使得溶胶粒子在乙醇、水或醇水混合物中均能良好的分散,使溶胶粒子均匀分布于预涂液中,提高预涂液的均匀性,进一步提高预涂层与基材层之间以及预涂层与UV硬化层之间的附着力;
(3)在柔性玻璃基材与UV硬化层之间增加预涂层,可以在保证总的涂层(预涂层+UV硬化层)厚度的前提下减小UV硬化层的厚度,不仅能有效避免UV硬化层过厚而容易开裂的问题,还可以达到保护和防飞溅效果;
(4)本发明通过在柔性玻璃基材与UV硬化层之间涂布预涂液获得预涂层的方法来提高UV硬化层的附着力,不会影响UV硬化层的光学透明性、硬度、耐磨性等综合性能,而且基材、预涂层和UV硬化层的透明性均较高,从而使柔性玻璃硬化膜具有较高的整体透明度。
具体实施方式
现在结合实施例对本发明作进一步详细的说明。
增强柔性玻璃基材表面附着力的预涂液,由如下方法制备而成:按比例称取各组分,将多羟基聚合物、硅烷偶联剂和无机溶胶加入溶剂中,加热到40-90℃,搅拌均匀即得预涂液。
其中,无机溶胶的粒径为2-50nm。
增强柔性玻璃基材表面附着力的预涂液的应用方法,包括如下步骤:
(1)将预涂液均匀涂布到柔性玻璃上,热固化得到预涂层;
(2)在预涂层表面均匀涂布一层UV硬化液,固化得到UV硬化层,待UV硬化层冷却后贴合保护膜即可。
其中,步骤(1)中的热固化温度为80-200℃,时间为1-30min。所获得的预涂层的厚度为0.5-35μm,UV硬化层的厚度为2-35μm。步骤(2)中的UV硬化液可以直接选用市售的柔性玻璃用UV硬化液,具体固化条件都以所选择市售UV硬化液的要求为准。
实施例1-5和对比例1-4的预涂液所用各组分及其用量及固化参数见表1。
表1
Figure BDA0002233684290000031
对比例5与实施例4基本相同,不同之处在于,对比例5未在柔性玻璃基材上涂布预涂液。
用实施例1-5和对比例1-4所制备预涂液制备的柔性玻璃硬化膜以及对比例5的柔性玻璃硬化膜的各项性能测试结果见表2。
表2
Figure BDA0002233684290000041
由于预涂液是涂覆在柔性玻璃基材与表面硬化层之间,所以不会对硬化层的光学透明性硬度、耐磨性、耐黄变性能等产生影响。
以上述依据本发明的理想实施例为启示,通过上述的说明内容,相关工作人员完全可以在不偏离本项发明技术思想的范围内,进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容,必须要根据权利要求范围来确定其技术性范围。

Claims (10)

1.一种增强柔性玻璃基材表面附着力的预涂液,其特征在于:由如下重量份的各组分组成:
多羟基聚合物 10-90份
硅烷偶联剂 0-20份
无机溶胶 10-90份
溶剂 500-2000份。
2.如权利要求1所述的增强柔性玻璃基材表面附着力的预涂液,其特征在于:所述多羟基聚合物为纤维素、淀粉、聚乙烯醇、聚乙烯醇缩甲醛中的一种或几种。
3.如权利要求1所述的增强柔性玻璃基材表面附着力的预涂液,其特征在于:所述硅烷偶联剂为具有环氧基的硅烷偶联剂、具有氨基的硅烷偶联剂、具有双键的硅烷偶联剂中的一种或几种。
4.如权利要求3所述的增强柔性玻璃基材表面附着力的预涂液,其特征在于:所述硅烷偶联剂为γ-缩水甘油醚氧丙基三甲氧基硅烷、氨丙基三甲氧基硅烷、γ-甲基丙烯酰氧基丙基三甲氧基硅烷中的一种或几种。
5.如权利要求1所述的增强柔性玻璃基材表面附着力的预涂液,其特征在于:所述无机溶胶为硅溶胶、铝溶胶中的一种或两种;所述无机溶胶的粒径为2-50nm。
6.如权利要求1所述的增强柔性玻璃基材表面附着力的预涂液,其特征在于:所述溶剂为醇类、水或醇水混合物。
7.如权利要求1-6任一项所述的增强柔性玻璃基材表面附着力的预涂液,其特征在于:由如下方法制备而成:按比例称取各组分,将多羟基聚合物、硅烷偶联剂和无机溶胶加入溶剂中,加热到40-90℃,搅拌均匀即得预涂液。
8.一种如权利要求7所述增强柔性玻璃基材表面附着力的预涂液的应用方法,其特征在于:包括如下步骤:
(1)将预涂液均匀涂布到柔性玻璃上,热固化得到预涂层;
(2)在预涂层表面均匀涂布一层UV硬化液,固化得到UV硬化层,待UV硬化层冷却后贴合保护膜即可。
9.如权利要求8所述的增强柔性玻璃基材表面附着力的预涂液的应用方法,其特征在于:所述步骤(1)中的热固化温度为80-200℃,时间为1-30min。
10.如权利要求8所述的增强柔性玻璃基材表面附着力的预涂液的应用方法,其特征在于:所述预涂层的厚度为0.5-35μm,所述UV硬化层的厚度为2-35μm。
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