CN109536125B - 一种有机硅led封装胶及其制备方法 - Google Patents
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Abstract
本发明涉及一种有机硅LED封装硅胶,包含A、B两个组分,A组分、B组分重量比为1:1:A组分包括:乙烯基硅树脂50~60份,增韧剂30~40份、催化剂0.1~0.3份;B组分包括:含氢硅树脂50~60份,含氢硅油30~40份,抑制剂0.4~0.5份,粘接剂4~5份;本发明制备的有机硅LED封装胶具有光衰性能好,耐硫化性能强,密封性能、耐老性能好,耐候性能好,抗黄变,易脱泡,便于操作等优点。
Description
技术领域
本发明涉及一种有机硅LED封装胶及其制备方法,属于封装材料领域。
技术背景
LED作为绿色照明能源,已经进入一个蓬勃发展的时期。对LED的要求也随之不断地提升,封装胶水作为保护芯片的最后一道防线,也面临着越来越多的挑战。光学性能(透光率、折射率)、耐硫化性能、粘接性能、高温光衰等、冷热冲击性能等各个方面的性能,需要做很大的突破才能适应LED行业的飞速发展。
有机硅封装胶的结构直接影响其光学性能及其它老化性能,通过对结构的调整,新型粘接剂的合成,新型增韧剂的加入,才能使胶水的性能有比较大的提升。
发明内容
本发明旨在合成一种有机硅LED封装硅胶,旨在提高对金属、SMC、EMC等新型材料的粘接性,本发明制备的封装胶具有热稳定性高、较好的粘接强度,低光衰等优点。本发明解决上述技术问题的技术方案如下:本发明分为A、B两个组分,A组分、B组分重量比为1:1:A组分为乙烯基硅树脂、催化剂、增韧剂等为主的组合物;B组分为含氢硅树脂、含氢硅树脂、抑制剂、粘接剂为主的组合物;
进一步其特征在于A组分中的乙烯基硅树脂,其分子结构中由M、D、T链节选择性的组合构成主链,其结构如下:(Me3SiO0.5)a(Ph2SiO1)b(ViSiO1.5)c,其中a:(b+c)=1:3~1:5、c=1~1.5;
进一步其特征在于A组分中的催化剂,特征在于所述的催化剂是铂系催化剂;所述铂系催化剂为铂~乙烯基硅氧烷配合物、铂烯烃配合物中的任意一种,其中铂含量为10000~15000ppm。
进一步,A组分中的增韧剂,其特征在于苯基乙烯基硅油,其结构分子结构式为:
其中:e=20-40,f=4-8,j=10-20;
进一步,B组分中含氢硅树脂的结构为:MT型(一),MDT(二)型两种结构中的一种或两种,其分子式分别为:
(HMe2SiO0.5)k(PhSiO1.5)l,其中k:l=1:1.5~1:2
(HMe2SiO0.5)m(PhMeSiO)n(PhSiO1.5)o,其中m:(n+o)=1:1.5~1:2;
进一步,B组分中的含氢硅油的结构为:
其中r=4n,n=1-2;S=10-20;t=10-20;
进一步,B组分的粘接剂,其结构为以下结构中的一种
进一步,B组分中的抑制剂为炔醇类物质、含烯烃基的化合物;
进一步,一种有机硅LED封装胶用粘接剂,按重量份计,制备步骤如下:
所述A组分的制备步骤如下:乙烯基硅树脂50~60份,增韧剂30~40份、催化剂0.1~0.3份,依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述A组分;
所述B组分的制备步骤如下:含氢硅树脂50~60份,含氢硅油30~40份,抑制剂0.4~0.5份,粘接剂4~5份;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述B组分。
与现有技术相比,本发明提供的有机硅LED封装胶具有光衰性能好,耐硫化性能强,密封性能、耐老性能好,耐候性能好,抗黄变,易脱泡,便于操作等优点。
具体实施方式
实施例1
A组分的制备步骤如下:乙烯基硅树脂,50份乙烯基硅树脂其结构如下:(Me3SiO0.5)a(Ph2SiO1)b(ViSiO1.5)c,其中a:(b+c)=1:3c=1;0.1份铂系催化剂为铂~乙烯基硅氧烷配合物10000ppm;30份增韧剂,其结构分子结构式为:
其中:e=20,f=4,j=10;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述A组分;
B组分的制备步骤如下:50份含氢硅树脂的结构为:MT型(一),
(HMe2SiO0.5)k(PhSiO1.5)l,其中k:l=1:1.5;30份含氢硅油的结构为:
其中r=4,S=10;t=10;4份粘接剂,结构
其中x=5,y=10;
0.4份抑制剂,乙炔醇;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述B组分。
实施例2
A组分的制备步骤如下:乙烯基硅树脂,50份乙烯基硅树脂其结构如下:(Me3SiO0.5)a(Ph2SiO1)b(ViSiO1.5)c,其中a:(b+c)=1:5c=1.5;0.3份铂系催化剂为铂~乙烯基硅氧烷配合物10000ppm;40份增韧剂,其结构分子结构式为:
其中:e=40,f=8,j=20;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述A组分;
B组分的制备步骤如下:50份含氢硅树脂的结构为:MT型(一),
(HMe2SiO0.5)k(PhSiO1.5)l,其中k:l=1:1.5;30份含氢硅油的结构为:
其中r=8,s=20;t=20;4份粘接剂,结构
其中l=10,m=10;
0.5份抑制剂,乙炔醇;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述B组分。
实施例3
A组分的制备步骤如下:乙烯基硅树脂,60份乙烯基硅树脂其结构如下:(Me3SiO0.5)a(Ph2SiO1)b(ViSiO1.5)c,其中a:(b+c)=1:4c=1.3;0.1份铂系催化剂为铂~乙烯基硅氧烷配合物15000ppm;35份增韧剂,其结构分子结构式为:
其中:e=35,f=8,j=20;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述A组分;
B组分的制备步骤如下:50份含氢硅树脂的结构为:MDT(二)型两种结构中的一种或两种,其分子式分别为:
(HMe2SiO0.5)m(PhMeSiO)n(PhSiO1.5)o,其中m:(n+o)=1:1.5;
2份粘接剂,结构
其中l=15,m=15;
3份粘接剂,结构
0.45份抑制剂,乙炔醇;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述B组分。
实施例4
A组分的制备步骤如下:乙烯基硅树脂,60份乙烯基硅树脂其结构如下:(Me3SiO0.5)a(Ph2SiO1)b(ViSiO1.5)c,其中a:(b+c)=1:4c=1.3;0.1份铂系催化剂为铂~乙烯基硅氧烷配合物15000ppm;35份增韧剂,其结构分子结构式为:
其中:e=30,f=4,j=150;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述A组分;
B组分的制备步骤如下:30份含氢硅树脂的结构为:MT型(一),
(HMe2SiO0.5)k(PhSiO1.5)l,其中k:l=1:1.5;30份含氢硅油的结构为:
其中r=4,s=10;t=10;
20份含氢硅树脂的结构为:MDT(二)型两种结构中的一种或两种,其分子式分别为:
(HMe2SiO0.5)m(PhMeSiO)n(PhSiO1.5)o,其中m:(n+o)=1:1.5;
2.5份粘接剂,结构
其中l=15,m=15;
2.5份粘接剂,结构
0.45份抑制剂,乙炔醇;依次加入搅拌机内,并充入氮气,混合搅拌均匀,即得所述B组分。
使用时,将所述A组分、B组分按重量比为1:1的配比混合均匀,真空脱泡20分钟,测试粘度和触变指数,随后点胶于待封装件上,先在90℃加热1.5小时,再在150℃加热2.5小时,即可。
本发明考察了硅胶的各种性能,光学性能(透光率、折射率)、耐硫化性能、粘接性能、高温光衰等、冷热冲击性能。
采用紫外可见分光光度计仪按GB/T2410-80测定透光率;
硫化实验的测试方法是:将封装的好的元件,放在封闭的硫化瓶80℃烘烤3-4小时硫化过程中,测试记录数据。
粘接性测试方法是:市售水性红墨水:酒精=1:1,固化后的支架放入其中,120℃,6小时观察有无渗透;
冷热冲击:-65℃~150℃,各15min,为一个循环;结果如下表1
表1
通过数据可以说明,通过本发明在光学性能(透光率、折射率)、耐硫化性能、粘接性能、高温光衰等、冷热冲击性能等各个性能方面都超过了现有的市售胶水,作为新一代的胶水有着很好的性能提升。
本发明制备的有机硅LED封装胶属于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 (1)
1.一种有机硅LED封装硅胶,其特征在于,包含A、B两个组分,A组分、B组分重量比为1:1,A组分包括:乙烯基硅树脂50~60份,增韧剂30~40份、催化剂0.1~0.3份;B组分包括:含氢硅树脂50~60份,含氢硅油30~40份,抑制剂0.4~0.5份,粘接剂4~5份;所述粘接剂其结构为以下结构中的一种,
所述乙烯基硅树脂结构如下:(Me3SiO0.5)a(Ph2SiO1)b(ViSiO1.5)c,其中a:(b+c)=1:3~1:5、c=1~1.5;
所述增韧剂为苯基乙烯基硅油,其结构式为:
其中:e=20-40,f=4-8,j=10-20;
所述含氢硅树脂的结构为:MT型(一),MDT(二)型两种结构中的一种或两种,其分子式分别为:
(HMe2SiO0.5)k(PhSiO1.5)l,其中k:l=1:1.5~1:2,
(HMe2SiO0.5)m(PhMeSiO)n(PhSiO1.5)o,其中m:(n+o)=1:1.5~1:2;
所述含氢硅油的结构为:
其中r=4n,n=1-2,S=10-20,t=10-20;
所述催化剂为铂~乙烯基硅氧烷配合物、铂烯烃配合物中的任意一种,其中铂含量为10000~15000ppm,抑制剂为炔醇类物质、含烯烃基的化合物。
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