CN107245317A - 湿气固化型聚氨酯热熔胶及其制备方法 - Google Patents

湿气固化型聚氨酯热熔胶及其制备方法 Download PDF

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CN107245317A
CN107245317A CN201710447965.9A CN201710447965A CN107245317A CN 107245317 A CN107245317 A CN 107245317A CN 201710447965 A CN201710447965 A CN 201710447965A CN 107245317 A CN107245317 A CN 107245317A
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田耕
张念椿
杨露明
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GUANGZHOU QIANSHUN INDUSTRIAL MATERIAL Co Ltd
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Abstract

本发明涉及一种湿气固化型聚氨酯热熔胶及其制备方法。该湿气固化型聚氨酯热熔胶包括以下重量份的原料：20～30份的聚乙二醇200、1,4‑丁二醇10～20份、多异氰酸酯10～30份、乙基三氯硅烷5～10份、三氯化铈0.5～3份、增塑剂5～12份、稳定剂2～6份、抗氧剂0.1～2份、着色剂0～18份、催化剂10～20份以及填料0～20份，其中所述多异氰酸酯选自MDI和/或HDI，所述催化剂选自纳米钛白粉和/或纳米碳酸钙。本发明的湿气固化型聚氨酯热熔胶整体上具有初粘力强、粘接强度高和韧性好的特性，同时具有极强的渗透性和亲和力，能够耐高温，能够适用于金属、塑料、玻璃等基材的牢固粘结。本发明的湿气固化型聚氨酯热熔胶的制备方法简单、可靠，施胶方便。

Description

湿气固化型聚氨酯热熔胶及其制备方法
技术领域
本发明涉及电子胶黏剂领域，特别是涉及一种湿气固化型聚氨酯热熔胶及其制备方法。
背景技术
热熔胶是一种可塑性的粘合剂，在一定温度范围内其物理状态随温度改变而改变，而化学特性不变，其无毒无味，属环保型化学产品。其中湿气固化型聚氨酯热熔胶受到了广泛应用。但是现有的湿气固化型聚氨酯热熔胶的粘接强度和韧性依然需要提高。
发明内容
基于此，有必要提供一种能够粘接强度高且柔韧性好的湿气固化型热熔胶及其制备方法。
一种湿气固化型聚氨酯热熔胶，包括以下重量份的原料：
其中，所述多异氰酸酯选自4,4'二苯基甲烷二异氰酸酯(MDI)和/或己烷-1,6-二异氰酸酯(HDI)，所述催化剂选自纳米钛白粉和/或纳米碳酸钙。
在其中一个实施例中，所述多异氰酸酯为重量比7～9:19～21的MDI和HDI。
在其中一个实施例中，所述增塑剂选自邻苯二甲酸二正辛酯，邻苯二甲酸丁苄酯、邻苯二甲酸二仲辛酯和邻苯二甲酸二环己酯中的至少一种。
在其中一个实施例中，所述抗氧剂选自4-羟基十八烷酸酰替苯胺、4，4'-硫代双(3-甲基-6-叔丁基苯酚)和2，2'-甲撑双(4-甲基-6-叔丁基苯酚)中的至少一种。
在其中一个实施例中，所述稳定剂选自2-乙基乙酸铅、水杨酸铅、三盐基硬脂酸铅和二盐基邻苯二甲酸铅的至少一种。
在其中一个实施例中，所述着色剂选自硫酸钡、氧化钛或硫酸铁。
在其中一个实施例中，所述填料为炭黑。
上述湿气固化型聚氨酯热熔胶的制备方法，其特征在在于，包括如下步骤：
按照上述湿气固化型聚氨酯热熔胶的组分称取各原料；
将聚乙二醇200、1,4-丁二醇、乙基三氯硅烷、三氯化铈和多异氰酸酯混合后在保护气的条件下，在温度30℃～60℃条件下反应4～6h，获得分子量为10～20万的含Si-O聚氨酯，然后加入所述增塑剂、所述稳定剂和所述抗氧化剂混合，均匀分散，形成半成品基料；
将所述半成品基料中加入所述催化剂、所述填料和所述着色剂，均匀分散，脱泡，即得。
本发明具有如下有益效果：
本发明的湿气固化型聚氨酯热熔胶通过选用聚乙二醇200、1,4-丁二醇、乙基三氯硅烷和多异氰酸酯，配以特定比例的增塑剂、催化剂、填料和抗氧化剂，并配合三氯化铈的稀土协同催化，使整个配方体系能够提高固化速率，同时提高可操作性，使整体上获得的湿气固化型聚氨酯热熔胶为含Si-O聚氨酯，具有初粘力强、粘接强度高和韧性好的特性，同时具有极强的渗透性和亲和力，能够耐高温，能够适用于金属、塑料、玻璃等基材的牢固粘结。尤其催化剂筛选为纳米钛白粉和/或纳米碳酸钙，比表面积大，表面活性好，具有较好的催化活性，同时也可以作为填料提高湿气固化型聚氨酯热熔胶的韧性和色泽，提高固含量，便于施胶。本发明的湿气固化型聚氨酯热熔胶的制备方法简单、可靠，施胶方便。
进一步地，本发明的湿气固化型聚氨酯热熔胶通过筛选增塑剂、催化剂、填料、抗氧化剂和着色剂的具体种类和配比，在湿气固化型聚氨酯热熔胶用量少的情况下，整体的粘合强度比同样条件下的常规胶粘剂高，能够显著降低胶粘剂的使用量。通过本发明的湿气固化型聚氨酯热熔胶施胶方便、熔点低，110℃即可施胶，与湿气中的水分反应，完全固化后的湿气固化型聚氨酯热熔胶具有非常高的耐冲击性，能够广泛应用于手机、平板计算机窄边框等电子产品中。
具体实施方式
下面结合具体实施例对本发明的湿气固化型聚氨酯热熔胶及其制备方法做进一步详细地说明。
实施例1
本实施例提供一种湿气固化型聚氨酯热熔胶，包括表1中的重量份的原料。本实施例的湿气固化型聚氨酯热熔胶制备方法包括如下步骤：
按照表1中的湿气固化型聚氨酯热熔胶的组分称取各原料。
将聚乙二醇200、1,4-丁二醇、乙基三氯硅烷、三氯化铈和多异氰酸酯在保护气的条件下，在40℃条件下反应5h，获得分子量范围为10～20万的含Si-O聚氨酯，然后加入增塑剂、稳定剂和抗氧化剂混合，均匀分散，形成半成品基料。将半成品基料中加入催化剂、填料和着色剂，均匀分散，脱泡，即得。
表1实施例1的湿气固化型聚氨酯热熔胶的组成
实施例2
本实施例提供一种湿气固化型聚氨酯热熔胶，包括表2中的重量份的原料。本实施例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表2实施例2的湿气固化型聚氨酯热熔胶的组成
实施例3
本实施例提供一种湿气固化型聚氨酯热熔胶，包括表3中的重量份的原料。本实施例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表3实施例3的湿气固化型聚氨酯热熔胶的组成
实施例4
本实施例提供一种湿气固化型聚氨酯热熔胶，包括表4中的重量份的原料。本实施例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表4实施例4的湿气固化型聚氨酯热熔胶的组成
实施例5
本实施例提供一种湿气固化型聚氨酯热熔胶，包括表5中的重量份的原料。本实施例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表5实施例5的湿气固化型聚氨酯热熔胶的组成
对比例1
本对比例提供一种湿气固化型聚氨酯热熔胶，包括表6中的重量份的原料。本对比例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表6对比例1的湿气固化型聚氨酯热熔胶的组成
对比例2
本对比例提供一种湿气固化型聚氨酯热熔胶，包括表7中的重量份的原料。本实施例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表7对比例2的湿气固化型聚氨酯热熔胶的组成
对比例3
本对比例提供一种湿气固化型聚氨酯热熔胶，包括表8中的重量份的原料。本对比例的湿气固化型聚氨酯热熔胶制备方法与实施例1的方法相同。
表8对比例3的湿气固化型聚氨酯热熔胶的组成
性能测试
将实施例1至5及对比例1至3的湿气热固型聚氨酯热熔胶的性能进行测试，结果见表9。
表9实施例1至5及对比例1至3的湿气热固型聚氨酯热熔胶的性能
由表9可以看出，与对比例1～3相比，实施例1至5的湿气固化型聚氨酯热熔胶，在施工用料较少或相同的情况下，具有良好的粘接强度和抗冲击强度，同时也具有耐高温的特性。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (8)

1.一种湿气固化型聚氨酯热熔胶，其特征在于，包括以下重量份的原料：
其中，所述多异氰酸酯选自MDI和/或HDI，所述催化剂选自纳米钛白粉和/或纳米碳酸钙。
2.根据权利要求1所述的湿气固化型聚氨酯热熔胶，其特征在于，所述多异氰酸酯为重量比7～9:19～21的MDI和HDI。
3.根据权利要求1或2所述的湿气固化型聚氨酯热熔胶，其特征在于，所述增塑剂选自邻苯二甲酸二正辛酯、邻苯二甲酸丁苄酯、邻苯二甲酸二仲辛酯和邻苯二甲酸二环己酯中的至少一种。
4.根据权利要求1或2所述的湿气固化型聚氨酯热熔胶，其特征在于，所述抗氧剂选自4-羟基十八烷酸酰替苯胺、4，4'-硫代双(3-甲基-6-叔丁基苯酚)和2，2'-甲撑双(4-甲基-6-叔丁基苯酚)中的至少一种。
5.根据权利要求1或2所述的湿气固化型聚氨酯热熔胶，其特征在于，所述稳定剂选自2-乙基乙酸铅、水杨酸铅、三盐基硬脂酸铅和二盐基邻苯二甲酸铅的至少一种。
6.根据权利要求1或2所述的湿气固化型聚氨酯热熔胶，其特征在于，所述着色剂选自硫酸钡、氧化钛或氧化铁。
7.根据权利要求1或2所述的湿气固化型聚氨酯热熔胶，其特征在于，所述填料为炭黑。
8.一种权利要求1至7中任一项所述的湿气固化型聚氨酯热熔胶的制备方法，其特征在在于，包括如下步骤：
按照权利要求1至7中任一项所述的湿气固化型聚氨酯热熔胶的组分称取各原料；
将聚乙二醇200、1,4-丁二醇、乙基三氯硅烷、三氯化铈和多异氰酸酯混合后在保护气的条件下，于温度30℃～60℃条件反应4～6h，获得分子量为10～20万的含Si-O聚氨酯，然后加入所述增塑剂、所述稳定剂和所述抗氧化剂混合，均匀分散，形成半成品基料；
将所述半成品基料中加入所述催化剂、所述填料和所述着色剂，均匀分散，脱泡，即得。
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