CN106634756A - 双组份led灌封胶 - Google Patents
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Abstract
本发明公开了一种双组份LED灌封胶,属环氧灌封胶领域。其由A、B两种组分构成,A组分主要包括:环氧树脂、色浆、消泡剂、脱模剂、活性稀释剂、增韧剂;B组分主要包括:酸酐固化剂、二元醇、固化促进剂、抗氧剂。使用时两组份按照A:B=1:1(重量比)混匀即可使用。本发明在酸酐固化剂中添加一定比例的氢化甲基纳迪克酸酐,固化后使LED耐温性和机械性能大大提高,且固化后能大大提高LED的透光率。其制备工艺操作简单,实用性强,节约能源、成本低,无环境污染,具有很好的应用前景。
Description
技术领域
本发明涉及环氧灌封胶领域,特别是涉及一种采用酸酐固化剂制备的双组份LED灌封胶。
背景技术
LED灌封胶是一种LED封装的辅料,具有高折射率和高透光率,可以起到保护LED芯片增加LED的光通量,粘度小,易脱泡,适合灌封及模压成型,使LED有较好的耐久性和可靠性。目前常用的LED灌封胶通产采用环氧树脂灌封材料,其由环氧树脂、固化剂、稀释剂等组成,由于环氧树脂具有多个极性基团和活性很大的环氧基,具有很强的粘合力,因而适合多种材料的粘接与灌封。随着航空航天、船舶、电子等行业的快速发展,灌封器件的高性能化对灌封材料提出越来越高的要求。现有市场上的环氧树脂灌封料材料往往仅具备某种性能,缺乏既耐高温,同时在高温环境中仍然能保持较好机械性能的环氧树脂灌封料。因此,研发具备多种性能的环氧树脂灌封料才能满足目前市场需求。
发明内容
本发明目的在于提供一种成本低、性能好的LED灌封胶,使其在LED应用过程中达到耐高温性、耐腐蚀性、阻燃性好、机械性能和介电性能良好。
本发明解决其技术问题所采用的技术方案是:所述灌封胶由A和B两组分组成,按各组分重量份计,
其中A组分由如下组份组成:
环氧树脂 93-98份
色浆 0.1-0.2份
消泡剂 0.2-0.5份
脱模剂 0.2-0.5份
活性稀释剂 1-3份
增韧剂 1-3份;
所述消泡剂选XP-008(硅氧烷类);所述脱模剂选T-5300(硅氧烷类);所述活性稀释剂选501(缩水甘油醚类);所述增韧剂选DINCH(六氢邻苯二甲酸二异壬酯)。
B组分由如下组份组成:
酸酐固化剂 95-98份
二元醇 1-3份
固化促进剂 1-2份
抗氧剂 0.1-0.5份。
所述酸酐固化剂为六氢邻苯二甲酸酐和氢化甲基纳迪克酸酐,俩者加入重量份比为:70-80:15-25;所述二元醇选新戊二醇;所述固化促进剂选季铵盐(四丁基溴化铵或者四乙基溴化铵或者有机磷盐);所述抗氧剂选2,6-二叔丁基-4-甲基苯酚。
酸酐固化剂LED灌封胶生产工艺具体步骤如下:
A组分:
将环氧树脂加热至70-90℃,投入到反应釜中;
再分别将色浆、消泡剂、脱模剂、活性稀释剂、增韧剂分别加入到反应釜中,并不断搅拌;加热至70-90℃抽真空,得到A组分;
B组分:
将酸酐固化剂、固化促进剂、二元醇、抗氧剂投入到反应釜中,不断搅拌并控制温度50-70℃,至固体完全溶解,得到B组分;
本发明的有益效果是:在酸酐固化剂中添加一定比例的氢化甲基纳迪克酸酐,固化后使LED耐温性和机械性能大大提高,并且制得的LED灌封胶无毒无害,固化后能大大提高LED的透光率。其制备工艺操作简单,实用性强,节约能源、成本低,无环境污染,具有很好的应用前景。
具体实施方式
为了更好的对本发明进行详细说明,举实施例如下:
实施例1
将95份环氧树脂加热至75℃,投入到反应釜中;再分别将0.2份色浆、0.4份消泡剂、0.2份脱模剂、2份活性稀释剂、1份增韧剂分别加入到反应釜中,并不断搅拌;加热至80℃抽真空至少一个小时,得到A组分。
将81.2份甲基六氢邻苯二甲酸酐,15份氢化甲基纳迪克酸酐、1.5份固化促进剂、2份二元醇、0.3份抗氧剂投入到干净的反应釜中,不断搅拌并控制温度在60℃;加热搅拌至固体完全溶解,得到无色透明液体,得到B组分。使用时,将A组分和B组分按照A:B=1:1(重量比)混合均匀灌胶、加热固化即可获得良好耐高温和机械性能的灌装端面。
实施例2
将93份环氧树脂加热至90℃,投入到反应釜中;再分别将0.2份色浆、0.2份消泡剂、0.4份脱模剂、1份活性稀释剂、2份增韧剂分别加入到反应釜中,并不断搅拌;加热至90℃抽真空至少一个小时,得到A组分。
将77.2份甲基六氢邻苯二甲酸酐,20份氢化甲基纳迪克酸酐、2份固化促进剂、3份二元醇、0.1份抗氧剂投入到干净的反应釜中,不断搅拌并控制温度在50℃;加热搅拌至固体完全溶解,得到无色透明液体,得到B组分。使用时,将A组分和B组分按照A:B=1:1(重量比)混合均匀灌胶、加热固化即可获得良好耐高温和机械性能的灌装端面。
实施例3
将98份环氧树脂加热至70℃,投入到反应釜中;再分别将0.2份色浆、0.4份消泡剂、0.4份脱模剂、2份活性稀释剂、2份增韧剂分别加入到反应釜中,并不断搅拌;加热至80℃抽真空至少一个小时,得到A组分。
将71.2份甲基六氢邻苯二甲酸酐,25份氢化甲基纳迪克酸酐、1.5份固化促进剂、1份二元醇、0.5份抗氧剂投入到干净的反应釜中,不断搅拌并控制温度在50℃;加热搅拌至固体完全溶解,得到无色透明液体,得到B组分。使用时,将A组分和B组分按照A:B=1:1(重量比)混合均匀灌胶、加热固化即可获得良好耐高温和机械性能的灌装端面。
表1:实施例1-3制得的灌封胶灌封LED性能测试
实施例1 | 实施例2 | 实施例3 | |
热变形温度/℃ | 205.6 | 212.4 | 219.6 |
弯曲强度(25℃)/MPa | 91.2 | 93.5 | 95.8 |
冲击强度(25℃)/(kJ·m2) | 14.1 | 15.2 | 16.8 |
Claims (3)
1.一种双组份LED灌封胶,其特征在于:所述灌封胶由A和B两组分构成,各组分按重量份计:
其中A组分由如下组份组成:
环氧树脂 93-98份
色浆 0.1-0.2份
消泡剂 0.2-0.5份
脱模剂 0.2-0.5份
活性稀释剂 1-3份
增韧剂 1-3份
B组分由如下组份组成:
酸酐固化剂 95-98份
二元醇 1-3份
固化促进剂 1-2份
抗氧剂 0.1-0.5份;
所述消泡剂选硅氧烷类消泡剂XP-008;所述脱模剂选硅氧烷类脱模剂T-5300;所述活性稀释剂选缩水甘油醚类活性稀释剂501;所述增韧剂选六氢邻苯二甲酸二异壬酯;
所述酸酐固化剂为甲基六氢邻苯二甲酸酐和氢化甲基纳迪克酸酐;所述二元醇选新戊二醇;所述固化促进剂选四丁基溴化铵或者四乙基溴化铵或者有机磷盐;所述抗氧剂选 2,6-二叔丁基-4-甲基苯酚。
2.如权利要求1所述的双组份LED灌封胶,其特征在于:其中A组分由如下组份组成:
其中A组分由如下组份组成:
环氧树脂 98份
色浆 0.2份
消泡剂 0.4份
脱模剂 0.4份
活性稀释剂 2份
增韧剂 2份
B组分由如下组份组成:
酸酐固化剂 96.2份
二元醇 1份
固化促进剂 1.5份
抗氧剂 0.5份。
3.如权利要求1或2所述的双组份LED灌封胶,其特征在于:所述酸酐固化剂甲基六氢邻苯二甲酸酐和氢化甲基纳迪克酸酐俩者加入重量份比为:70-80:15-25。
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Cited By (3)
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CN109280520A (zh) * | 2018-09-26 | 2019-01-29 | 重庆江川化工(集团)有限公司 | 一种电子高压包专用双组份环氧灌封胶的生产工艺 |
CN110408357A (zh) * | 2019-08-27 | 2019-11-05 | 福建泉州三闲家居饰品有限公司 | 一种环氧树脂胶及其使用方法 |
CN111378409A (zh) * | 2018-12-28 | 2020-07-07 | 北京科化新材料科技有限公司 | 透明的耐老化单组份环氧胶组合物和环氧胶粒料及其制造方法和应用 |
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