CN106905899A - 高cti耐湿热的阻燃压敏胶及其制备方法 - Google Patents

高cti耐湿热的阻燃压敏胶及其制备方法 Download PDF

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CN106905899A
CN106905899A CN201710208238.7A CN201710208238A CN106905899A CN 106905899 A CN106905899 A CN 106905899A CN 201710208238 A CN201710208238 A CN 201710208238A CN 106905899 A CN106905899 A CN 106905899A
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金小林
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Abstract

本发明公开了一种高CTI耐湿热的阻燃压敏胶及其制备方法，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂0.1‑1.0份，阻燃剂5‑20份，氢氧化铝5‑10份，钛酸酯偶联剂0.1‑2.0份，溶剂10‑30份；将各组分混合，搅拌20‑30分钟至均相混合液体，涂布成膜，烘烤，控制总厚度在95‑100微米，得到高CTI耐湿热的阻燃压敏胶。本发明助剂添加量低，在具有较高的CTI值的同时具有优异的机械性能、粘接性和耐湿热性能，有效的提高了电子产品的安全可靠性，特别是潮湿环境下使用的绝缘材料的安全可靠性。

Description

高CTI耐湿热的阻燃压敏胶及其制备方法
技术领域
本发明涉及压敏胶带领域，尤其是一种阻燃压敏胶组合物并且具有较高的CTI值和耐湿热性能。
背景技术
由于电气的安全因数，UL对高频变压器用绝缘材料有着较高的安全规定，例如阻燃要求和最小安全爬电距离。相对漏电起痕指数（CTI）是一个指数，用于绝缘材料中，表示在绝缘材料表面或接近其表面放电而引起该绝缘材料表面上局部导电通路破坏的电压值。CTI值可作为选用绝缘材料爬电距离的一个标准，CTI值越高，爬电距离越小，变压器设计尺寸越小。随着现代电子产品的薄型化小型化的发展，该项性能要求对绝缘胶带的要求也越发严格。尤其是对于变压器的挡墙胶带产品，其CTI值的好坏直接影响着最终的绝缘胶带层厚度。
目前常规的提高CTI的方法主要是加入耐漏电起痕指数助剂，主要有氢氧化铝，三聚氰胺等，但不足之处是要想达到满足的CTI值，需要较大的添加量（大于50%），并且严重损害了其他性能（如机械性能，粘接性，耐湿热性能）。为提高电子产品的安全可靠性，特别是潮湿环境下使用的绝缘材料的安全可靠性，开发高CTI耐湿热的胶带产品是重要的市场需求。
发明内容
本发明的目的在于提供一种阻燃压敏胶组合物，用该组合物制备的胶带具有较高的CTI值和耐湿热性能。
为实现上述目的，本发明采用的技术方案为：
一种高CTI耐湿热的阻燃压敏胶，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂0.1-1.0份，阻燃剂5-20份，氢氧化铝5-10份，钛酸酯偶联剂0.1-2.0份，溶剂10-30份。
所述金属盐固化剂为乙酰丙酮铝、乙酰丙酮铜、乙酰丙酮锰或者乙酰丙酮钕中的至少一种。
所述阻燃剂为磷酸类阻燃剂。
所述钛酸酯偶联剂包括异丙基三(二辛基磷酸酰氧基)钛酸酯、双(二辛氧基焦磷酸酯基)乙撑钛酸酯或者双(二辛氧基焦磷酸酯基)乙撑钛酸酯和三乙醇胺的螯合物溶液中的至少一种。
所述溶剂为乙酸乙酯或者甲苯。
所述的一种高CTI耐湿热的阻燃压敏胶，组分及各组分的质量份数优选如下：丙烯酸脂聚合物100份，金属盐固化剂0.3份，阻燃剂7份，氢氧化铝5份，钛酸酯偶联剂0.3份，溶剂25份。
所述磷酸类阻燃剂为聚磷酸三聚氰胺、次磷酸铝、磷酸三苯酯或者磷酸二氢氨中的至少一种。
所述高CTI耐湿热的阻燃压敏胶的制备方法，将丙烯酸脂聚合物、金属盐固化剂、阻燃剂、氢氧化铝、钛酸酯偶联剂以及溶剂混合，搅拌20-30分钟至均相混合液体，涂布成膜，烘烤，控制总厚度在95-100微米，得到高CTI耐湿热的阻燃压敏胶。
所述涂布成膜步骤为在50微米聚酯薄膜上涂布成膜。
所述烘烤温度为100-110度，烘烤5-10分钟。
磷酸盐阻燃剂的使用有效的降低了阻燃剂的添加量并且具有较低的吸湿性，在CTI测试时磷酸盐阻燃剂的分解碳化有利于形成保护层，同时金属盐固化剂和钛酸酯偶联剂的使用增强了树脂固化物的耐热性和树脂和无机填料间的相容性。
有益效果：
本发明提供的阻燃压敏胶，助剂添加量低，在具有较高的CTI值的同时具有优异的机械性能、粘接性和耐湿热性能，有效的提高了电子产品的安全可靠性，特别是潮湿环境下使用的绝缘材料的安全可靠性。
具体实施方式
以下实施例中，所述原料来源及其型号如下：
丙烯酸树脂聚合物，昆山石梅，型号PS8231；乙酰丙酮铝 ,扬州立达树脂厂，型号LD-805；
次磷酸盐阻燃剂，科莱恩中国，型号OP935；双(二辛氧基焦磷酸酯基)乙撑钛酸酯，南京曙光化工厂，型号ND-311；氮吡啶固化剂，帝斯曼，型号CX-100；聚磷酸三聚氰胺，上海美莱珀化工；氢氧化铝，美国雅宝，型号104LEO。
实施例1
一种阻燃压敏胶，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂乙酰丙酮铝0.3份，阻燃剂次磷酸盐阻燃剂OP935 10份，溶剂乙酸乙酯25份。
将各组分混合，搅拌20-30分钟至均相混合液体，在50微米聚酯薄膜上涂布成膜，100-110度下烘烤5-10分钟，控制总厚度在95-100微米，得到阻燃压敏胶。
实施例2
一种高CTI耐湿热的阻燃压敏胶，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂乙酰丙酮铝0.3份，阻燃剂次磷酸盐阻燃剂OP935 7份，氢氧化铝5份，钛酸酯偶联剂双(二辛氧基焦磷酸酯基)乙撑钛酸酯 0.3份，溶剂乙酸乙酯25份。
将各组分混合，搅拌20-30分钟至均相混合液体，在50微米聚酯薄膜上涂布成膜，100-110度下烘烤5-10分钟，控制总厚度在95-100微米，得到高CTI耐湿热的阻燃压敏胶。
实施例3
一种高CTI耐湿热的阻燃压敏胶，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂乙酰丙酮铝0.5份，氮吡啶固化剂CX-100 0.5份，阻燃剂次磷酸盐阻燃剂OP935 7份，氢氧化铝5份，溶剂乙酸乙酯25份。
将各组分混合，搅拌20-30分钟至均相混合液体，在50微米聚酯薄膜上涂布成膜，100-110度下烘烤5-10分钟，控制总厚度在95-100微米，得到高CTI耐湿热的阻燃压敏胶。
实施例4
一种阻燃压敏胶，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，氮吡啶固化剂CX-100 0.5份，氢氧化铝20份，聚磷酸三聚氰胺 10份，溶剂乙酸乙酯30份。
将各组分混合，搅拌20-30分钟至均相混合液体，在50微米聚酯薄膜上涂布成膜，100-110度下烘烤5-10分钟，控制总厚度在95-100微米，得到高CTI耐湿热的阻燃压敏胶。
将各组分混合，搅拌20-30分钟至均相混合液体，在50微米聚酯薄膜上涂布成膜，100-110度下烘烤5-10分钟，控制总厚度在95-100微米，得到阻燃压敏胶。
实施例1-4的压敏胶性能测试结果见表1。
表1
磷酸盐阻燃剂的使用有效的降低了阻燃剂的添加量并且具有较低的吸湿性，在CTI测试时磷酸盐阻燃剂的分解碳化有利于形成保护层，同时金属盐固化剂和钛酸酯偶联剂的使用增强了树脂固化物的耐热性和树脂和无机填料间的相容性。

Claims (10)

1.一种高CTI耐湿热的阻燃压敏胶，其特征在于，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂0.1-1.0份，阻燃剂5-20份，氢氧化铝5-10份，钛酸酯偶联剂0.1-2.0份，溶剂10-30份。
2.根据权利要求1所述的一种高CTI耐湿热的阻燃压敏胶，其特征在于，所述金属盐固化剂为乙酰丙酮铝、乙酰丙酮铜、乙酰丙酮锰或者乙酰丙酮钕中的至少一种。
3.根据权利要求1所述的一种高CTI耐湿热的阻燃压敏胶，其特征在于，所述阻燃剂为磷酸类阻燃剂。
4.根据权利要求1所述的一种高CTI耐湿热的阻燃压敏胶，其特征在于，所述钛酸酯偶联剂包括异丙基三(二辛基磷酸酰氧基)钛酸酯、双(二辛氧基焦磷酸酯基)乙撑钛酸酯或者双(二辛氧基焦磷酸酯基)乙撑钛酸酯和三乙醇胺的螯合物溶液中的至少一种。
5.根据权利要求1所述的一种高CTI耐湿热的阻燃压敏胶，其特征在于，所述溶剂为乙酸乙酯或者甲苯。
6.根据权利要求1所述的一种高CTI耐湿热的阻燃压敏胶，其特征在于，组分及各组分的质量份数如下：丙烯酸脂聚合物100份，金属盐固化剂0.3份，阻燃剂7份，氢氧化铝5份，钛酸酯偶联剂0.3份，溶剂25份。
7.根据权利要求3所述的一种高CTI耐湿热的阻燃压敏胶，其特征在于，所述磷酸类阻燃剂为聚磷酸三聚氰胺、次磷酸铝、磷酸三苯酯或者磷酸二氢氨中的至少一种。
8.权利要求1至7中任意一项所述高CTI耐湿热的阻燃压敏胶的制备方法，其特征在于，将丙烯酸脂聚合物、金属盐固化剂、阻燃剂、氢氧化铝、钛酸酯偶联剂以及溶剂混合，搅拌20-30分钟至均相混合液体，涂布成膜，烘烤，控制总厚度在95-100微米，得到高CTI耐湿热的阻燃压敏胶。
9.根据权利要求8所述的制备方法，其特征在于，所述涂布成膜步骤为在50微米聚酯薄膜上涂布成膜。
10.根据权利要求8所述的制备方法，其特征在于，所述烘烤温度为100-110度，烘烤5-10分钟。
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