CN106893544A - 一种适用于led户外灯灌封披覆使用导热双重固化胶 - Google Patents
一种适用于led户外灯灌封披覆使用导热双重固化胶 Download PDFInfo
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Abstract
本发明公开了一种适用于LED户外灯灌封披覆使用导热双重固化胶,其由预聚物、活性稀释剂、包含导热填料、光引发剂、交联剂、抗老化剂、促进剂、稳定剂中的一种或多种组成,并通过搅拌后制成。有益效果在于:本发明较现有技术中的光固化胶具有更好的热稳定性,且粘接强度较高,同时能够在长时间使用后避免发黄,保证了LED灯珠的外观洁净,对LED灯珠的导热性好,提高了LED灯珠的使用寿命。
Description
技术领域
本发明属于导热固化胶配方设计领域,具体涉及一种适用于LED户外灯灌封披覆使用导热双重固化胶。
背景技术
随着人工成本增加和能源低碳化和自动化程度越来越高,户外LED的灯珠的封装人工成本增加和生产效率的提升,急需要改善现有LED封装用高温固化环氧树脂,采用UV和光固化工艺,既可以提升生产效率也可以改善产品质量。
但是目前的UV和湿气双重固化的胶在户外产品均存在一些问题:
1、很容易出现黄变,在户外接触自然环境一段时间后,导热胶会变黄,影响LED灯的外管;
2、产品硬度的提升,传统的固化胶硬度较低,导致LED灯珠强度较低;
3、导热性较差,使用导热性较差的导热胶,在LED灯的使用过程中不能对芯片进行及时散热,导致LED灯使用寿命缩短;
因此,需要一种能够长期保持颜色和性能稳定,同时固化硬度较高密切导热性能好的光固化胶,以解决现有技术中存在的不足。
发明内容
本发明的目的就在于为了解决上述问题而提供一种适用于LED户外灯灌封披覆使用导热双重固化胶。
本发明通过以下技术方案来实现上述目的:
一种适用于LED户外灯灌封披覆使用导热双重固化胶,其由预聚物、活性稀释剂、包含导热填料、光引发剂、交联剂、抗老化剂、促进剂、稳定剂中的一种或多种组成,并通过搅拌后制成。
进一步的,所述预聚物为环氧树脂或有机硅树脂中的一种,且质量分数为100份。
进一步的,所述环氧树脂为包含双酚A型环氧丙烯酸树脂、酚醛环氧丙烯酸树脂、改性环氧丙烯酸树脂中的一种或者多种,所述环氧树脂的粘度在100-10000CS。
进一步的,所述有机硅树脂为包含有丙烯酸单体接枝有机硅羟基硅树脂,有机硅树脂粘度在100-10000CS。
进一步的,所述活性稀释剂为丙烯酸羟乙酯、丙烯酸冰片酯、季戊四醇三丙烯酸酯中的一种或多种,且质量分数为20-25份。
进一步的,所述光引发剂为对紫外线光A波段有吸收作用的偶氮二异丁腈、过氧化苯甲酰、过氧化环己酮、过氧化异丙苯中的一种或多种。
进一步的,所述过氧化物为过氧化苯甲酰、过氧化环己酮、过氧化异丙苯中的一种或多种,所述偶氮类化合物为偶氮二异丁腈。
进一步的,所述稳定剂为对苯二酚,且质量分数为0.1-5份,所述促进剂为安息香丁醚。
进一步的,所述抗老化剂为受阻胺类材料,且质量分数为0.05-0.1份。
进一步的,所述导热填料为二氧化硅、氧化铝、气相白炭黑材料中的一种或多种,且为粒径范围为1-100nm的球形颗粒。
有益效果在于:本发明较现有技术中的光固化胶具有更好的热稳定性,且粘接强度较高,同时能够在长时间使用后避免发黄,保证了LED灯珠的外观洁净,对LED灯珠的导热性好,提高了LED灯珠的使用寿命。
具体实施方式
下面结合实施例对本发明作进一步说明:
实施例一:
一种适用于LED户外灯灌封披覆使用导热双重固化胶,其由采用丙烯酸改性聚硅氧烷材料组成的预聚物100份、采用丙烯酸羟乙酯材料组成的活性稀释剂20份、包含采用气相白炭黑组成的导热填料5份、采用184光引发剂组成的光引发剂1份、采用安息香丁醚组成的促进剂0.1份、采用对苯二酚组成的稳定剂0.1份,并通过搅拌后制成。
性能测试:后经热阻测试仪测试热阻值、在高温烤箱内部120℃条件下30天测试抗老优化性能,观察是否发黄、以铝板的剥离强度测试粘接特性。
经上述性能测试后,按照本实施例配方所制成的固化胶密度较低且热阻率较低。
实施例二:
一种适用于LED户外灯灌封披覆使用导热双重固化胶,其由采用丙烯酸改性双酚A环氧树脂材料组成的预聚物100份、采用丙烯酸羟乙酯材料组成的活性稀释剂20份、包含采用纳米氧化铝组成的导热填料5份、采用1173光引发剂组成的光引发剂0.5份、采用安息香丁醚组成的促进剂0.1份。
性能测试:后经热阻测试仪测试热阻值、在高温烤箱内部120℃条件下30天测试抗老优化性能,观察是否发黄、以铝板的剥离强度测试粘接特性。
经上述性能测试后,按照本实施例配方所制成的固化胶较实施例一粘接强度较高,粘接性能好。
实施例三:
一种适用于LED户外灯灌封披覆使用导热双重固化胶,其由采用丙烯酸改性聚硅氧烷材料组成的预聚物100份、采用丙烯酸羟乙酯材料组成的活性稀释剂25份、包含采用气相白炭黑组成的导热填料3份、采用1173光引发剂组成的光引发剂0.5份、采用安息香丁醚组成的促进剂0.1份、采用对苯二酚组成的稳定剂0.0.2份,并通过搅拌后制成。
性能测试:后经热阻测试仪测试热阻值、在高温烤箱内部120℃条件下30天测试抗老优化性能,观察是否发黄、以铝板的剥离强度测试粘接特性。
经上述性能测试后,按照本实施例配方所制成的固化胶较实施例一粘接强度较高、较实施例二的高温稳定性较强。
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其效物界定。
Claims (10)
1.一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:其由预聚物、活性稀释剂、包含导热填料、光引发剂、交联剂、抗老化剂、促进剂、稳定剂中的一种或多种组成,并通过搅拌后制成。
2.根据权利要求1所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述预聚物为环氧树脂或有机硅树脂中的一种,且质量分数为100份。
3.根据权利要求2所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述环氧树脂为包含双酚A型环氧丙烯酸树脂、酚醛环氧丙烯酸树脂、改性环氧丙烯酸树脂中的一种或者多种,所述环氧树脂的粘度在100-10000CS。
4.根据权利要求2所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述有机硅树脂为包含有丙烯酸单体接枝有机硅羟基硅树脂,有机硅树脂粘度在100-10000CS。
5.根据权利要求1所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述活性稀释剂为丙烯酸羟乙酯、丙烯酸冰片酯、季戊四醇三丙烯酸酯中的一种或多种,且质量分数为20-25份。
6.根据权利要求1所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述光引发剂为对紫外线光A波段有吸收作用的偶氮二异丁腈、过氧化苯甲酰、过氧化环己酮、过氧化异丙苯中的一种或多种。
7.根据权利要求6所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述过氧化物为过氧化苯甲酰、过氧化环己酮、过氧化异丙苯中的一种或多种,所述偶氮类化合物为偶氮二异丁腈。
8.根据权利要求1所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述稳定剂为对苯二酚,且质量分数为0.1-5份,所述促进剂为安息香丁醚。
9.根据权利要求1所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述抗老化剂为受阻胺类材料,且质量分数为0.05-0.1份。
10.根据权利要求1所述的一种适用于LED户外灯灌封披覆使用导热双重固化胶,其特征在于:所述导热填料为二氧化硅、氧化铝、气相白炭黑材料中的一种或多种,且为粒径范围为1-100nm的球形颗粒。
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