CN110903808A - 一种环氧改性的高折射率led封装硅胶及其制备方法 - Google Patents
一种环氧改性的高折射率led封装硅胶及其制备方法 Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 35
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical group OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 3
- QOSMNYMQXIVWKY-UHFFFAOYSA-N Propyl levulinate Chemical compound CCCOC(=O)CCC(C)=O QOSMNYMQXIVWKY-UHFFFAOYSA-N 0.000 claims description 3
- 150000008064 anhydrides Chemical class 0.000 claims description 3
- 150000001993 dienes Chemical class 0.000 claims description 3
- 125000003700 epoxy group Chemical group 0.000 claims description 3
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 3
- 239000011976 maleic acid Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 3
- 229910020388 SiO1/2 Inorganic materials 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 abstract description 6
- 239000005022 packaging material Substances 0.000 abstract description 4
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
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- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000004132 cross linking Methods 0.000 description 1
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- HIHIPCDUFKZOSL-UHFFFAOYSA-N ethenyl(methyl)silicon Chemical compound C[Si]C=C HIHIPCDUFKZOSL-UHFFFAOYSA-N 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
本发明属于封装材料技术领域,尤其涉及一种环氧改性的高折射率LED封装硅胶及其制备方法,包括重量比为1:1的A组分和B组分;其中,A组分按照重量份数计包括:环氧改性苯基乙烯基硅树脂60‑70份、乙烯基硅油10‑15份、促进剂10‑20份、扩链剂5‑10份和抑制剂0.5‑1.0份;B组分按照重量份数计包括:乙烯基硅油75‑85份、苯基乙烯基硅树脂10‑20份、粘结剂5‑10份和催化剂0.5‑1.5份。本发明的封装硅胶具有高亮度、高折射率、高透光率、耐高温等特点,且制备工艺简单,易于量产,适用作LED封装硅胶。
Description
技术领域
本发明属于封装材料技术领域,尤其涉及一种环氧改性的高折射率LED封装硅胶及其制备方法。
背景技术
LED寿命长、光效高、无辐射与低功耗,被广泛应用于各种显示屏、汽车灯以及各种电子产品的背光源以及照明用等,其封装材料的选择对LED的性能影响至关重要。但随着LED应用越来越广泛,对LED封装材料的要求也越越高,普通的有机硅高折体系已不能满足日益严苛的可靠性需求。
发明内容
本发明针对上述现有技术存在的不足,提供一种环氧改性的高折射率LED封装硅胶及其制备方法。
本发明解决上述技术问题的技术方案如下:一种环氧改性的高折射率LED封装硅胶,包括重量比为1:1的A组分和B组分;
其中,A组分按照重量份数计包括:环氧改性苯基乙烯基硅树脂60-70份、乙烯基硅油10-15份、促进剂10-20份、扩链剂5-10份和抑制剂0.5-1.0份;
B组分按照重量份数计包括:乙烯基硅油75-85份、苯基乙烯基硅树脂10-20份、粘结剂5-10份和催化剂0.5-1.5份。
进一步,所述环氧改性苯基乙烯基硅树脂的通式为(ViMe2SiO1/2)3(PhSiO3/2)7(C6H11O2)3,其中Me为甲基,Ph为苯基,Vi为乙烯基;其中接入的环氧基团的结构式如下:
采用上述方案的有益效果在于,通过对苯基乙烯基硅树脂进行环氧改性,参与改性的环氧基团为三维结构,能够提高所得硅胶的透光率和耐高温性能。
进一步,A组分和B组分中,所述乙烯基硅油的结构式为:
采用上述方案的有益效果在于,乙烯基硅油能够有效地缓解过度交联造成的内应力过高,能够增加硅胶的整体性能。
进一步,所述促进剂的结构式为:
采用上述方案的有益效果在于,促进剂能够增加柔性链节,平衡硅胶整体的综合性能。
进一步,所述扩链剂为1,4一丁二醇或1,6一己二醇。
进一步,所述抑制剂为乙炔基环己醇、1,1,3-三苯基-2-丙炔-1-醇或马来酸二烯丙脂中的一种或两种以上。
进一步,所述粘接剂的结构式为:
其中,Me为甲基,Et为乙基,Ph为苯基;n1=10-20,n2=10-20,n3=20-40,且n1、n2、n3均为整数。
采用上述方案的有益效果在于,本发明的粘接剂为含有环氧官能团的偶联剂γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(KH560)与丙烯酰氧基官能团的聚合物,该聚合物由带有端羟基的甲基乙烯基硅油、苯基乙烯基硅油与KH560等经脱甲醇反应制得。
进一步,所述催化剂由铂系催化剂与酸酐固化剂按照重量比(1-5):1混合组成。
更进一步,所述铂系催化剂为氯铂酸的醇溶液、铂-甲基苯基聚硅氧烷、铂-烯烃配合物或铂-甲基苯基乙烯基聚硅氧烷中的一种或两种以上,其中铂含量为7ppm;所述酸酐固化剂为芳香族酸酐或脂肪族酸酐。
本发明的第二个目的在于提供上述环氧改性的高折射率LED封装硅胶的制备方法,步骤如下:
(1)取60-70份环氧改性苯基乙烯基硅树脂、10-15份乙烯基硅油、10-20份促进剂、5-10份扩链剂和0.5-1.0份抑制剂,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取75-85份乙烯基硅油、10-20份苯基乙烯基硅树脂、5-10份粘接剂和0.5-1.5份催化剂,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5-10min,在80℃条件下固化30min,在160℃条件下固化60min,完成固化;或,将A组分、B组分按照重量比1:1混合均匀,真空脱泡5-10min,在110℃条件下Molding初固脱模5min,在150℃条件下固化4h后,完成固化。
本发明的特点和有益效果在于:
本发明的封装硅胶具有高亮度、高折射率、高透光率、耐高温等特点,且制备工艺简单,易于量产,适用作LED封装硅胶。
具体实施方式
以下结合实例对本发明的原理和特征进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
实施例1
一种环氧改性的高折射率LED封装硅胶的制备方法,步骤如下:
(1)取60g环氧改性苯基乙烯基硅树脂、12g乙烯基硅油(n=6)、14g促进剂(n=2)、7.2g扩链剂和0.8g乙炔基环己醇,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取78.2g乙烯基硅油(n=5)、15g苯基乙烯基硅树脂、6g粘接剂(n1=15,n2=15,n3=25)、0.6g铂-甲基苯基聚硅氧烷(铂含量7ppm)和0.2g芳香族酸酐,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5min,在80℃条件下固化30min,在160℃条件下固化60min,完成固化。
实施例2
一种环氧改性的高折射率LED封装硅胶的制备方法,步骤如下:
(1)取63g环氧改性苯基乙烯基硅树脂、14g乙烯基硅油(n=6)、13g促进剂(n=1)、7.0g扩链剂和1.0g1,1,3-三苯基-2-丙炔-1-醇,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取79.1g乙烯基硅油(n=5)、14g苯基乙烯基硅树脂、6g粘接剂(n1=15,n2=15,n3=25)、0.7g氯铂酸的醇溶液(铂含量7ppm)和0.2g脂肪族酸酐,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5min,在80℃条件下固化30min,在160℃条件下固化60min,完成固化。
实施例3
一种环氧改性的高折射率LED封装硅胶的制备方法,步骤如下:
(1)取65g环氧改性苯基乙烯基硅树脂、13g乙烯基硅油(n=6)、13g促进剂(n=2)、8.2g扩链剂和0.8g马来酸二烯丙脂,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取80g乙烯基硅油(n=6)、13g苯基乙烯基硅树脂、6g粘接剂(n1=15,n2=15,n3=25)、0.7g铂-甲基苯基乙烯基聚硅氧烷(铂含量7ppm)和0.3g芳香族酸酐,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5min,在110℃条件下Molding初固脱模5min,在150℃条件下固化4h后,完成固化。
实施例4
一种环氧改性的高折射率LED封装硅胶的制备方法,步骤如下:
(1)取68g环氧改性苯基乙烯基硅树脂、11g乙烯基硅油(n=5)、12g促进剂(n=2)、8.0g扩链剂、0.5g乙炔基环己醇和0.5g马来酸二烯丙脂,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取83.2g乙烯基硅油(n=6)、10g苯基乙烯基硅树脂、5g粘接剂(n1=15,n2=15,n3=25)、1.0g铂-甲基苯基聚硅氧烷(铂含量7ppm)和0.2g芳香族酸酐,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5min,在110℃条件下Molding初固脱模5min,在150℃条件下固化4h后,完成固化。
对比例1
一种封装硅胶的制备方法,步骤如下:
(1)取63g苯基乙烯基硅树脂、14g乙烯基硅油(n=6)、13g促进剂(n=1)、7.0g扩链剂和1.0g 1,1,3-三苯基-2-丙炔-1-醇,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取79.1g乙烯基硅油(n=5)、14g苯基乙烯基硅树脂、6g粘接剂(n1=15,n2=15,n3=25)、0.7g氯铂酸的醇溶液(铂含量7ppm)和0.2g脂肪族酸酐,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5min,在80℃条件下固化30min,在160℃条件下固化60min,完成固化。
将实施例1-4和对比例1制得的封装硅胶进行透光率测试,样品厚度为1mm,测试结果见表1。
表1
从表1可以看出,本发明的LED封装硅胶的透光率优异,均在99.3%以上,具有高亮度、高折射率、高透光率的特点。
将实施例1-4和对比例1制得的封装硅胶在3W灯珠、高温120℃(环境温度加上灯珠本身的散热,节温可达到180℃)环境下点亮1000h的光衰程度,测试结果如表2。
表2
从表2可以看出,本发明的LED封装硅胶在高温点亮1000h的光衰小于5%,具有优异的耐高温性能。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (9)
4.根据权利要求1所述的高折射率LED封装硅胶,其特征在于,所述扩链剂为1,4一丁二醇或1,6一己二醇。
5.根据权利要求1所述的高折射率LED封装硅胶,其特征在于,所述抑制剂为乙炔基环己醇、1,1,3-三苯基-2-丙炔-1-醇或马来酸二烯丙脂中的一种或两种以上。
7.根据权利要求1所述的高折射率LED封装硅胶,其特征在于,所述催化剂由铂系催化剂与酸酐固化剂按照重量比(1-5):1混合组成。
8.根据权利要求7所述的高折射率LED封装硅胶,其特征在于,所述铂系催化剂为氯铂酸的醇溶液、铂-甲基苯基聚硅氧烷、铂-烯烃配合物或铂-甲基苯基乙烯基聚硅氧烷中的一种或两种以上,其中铂含量为7ppm;所述酸酐固化剂为芳香族酸酐或脂肪族酸酐。
9.一种权利要求1所述环氧改性的高折射率LED封装硅胶的制备方法,其特征在于,步骤如下:
(1)取60-70份环氧改性苯基乙烯基硅树脂、10-15份乙烯基硅油、10-20份促进剂、5-10份扩链剂和0.5-1.0份抑制剂,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得A组分;
(2)取75-85份乙烯基硅油、10-20份苯基乙烯基硅树脂、5-10份粘接剂和0.5-1.5份催化剂,利用机械混合搅拌均匀,抽真空脱泡,充入氮气,密闭储存,即得B组分;
(3)将A组分、B组分按照重量比1:1混合均匀,真空脱泡5-10min,在80℃条件下固化30min,在160℃条件下固化60min,完成固化;或,将A组分、B组分按照重量比1:1混合均匀,真空脱泡5-10min,在110℃条件下Molding初固脱模5min,在150℃条件下固化4h后,完成固化。
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