CN105969302A - 一种耐黄变led封装硅胶的制备方法 - Google Patents
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Abstract
本发明涉及一种耐黄变LED封装硅胶的制备方法,属于胶体制备技术领域。本发明以盐酸催化水解自制甲基硅增粘剂,将增粘剂和硅树脂混合经生物改性脱除氨基得混合基胶,再将基胶与含氢硅油加成反应,辅以抗氧化剂,交联固化后即得耐黄变LED封装硅胶。本发明制备的LED封装硅胶经生物酶改性后,脱除部分氨基,抗氧化性变强使其耐黄变性能增强,同时粘性提高,具有广阔的应用前景。
Description
技术领域
本发明涉及一种耐黄变LED封装硅胶的制备方法,属于胶体制备技术领域。
背景技术
节能可持续发展已不再是一个选择性的问题,而是当今世界未来发展的必行之路。以 LED 为代表的新光源照明取代传统光源,正引发照明行业的一场巨大变革。这种新光源照明产品正在创新技术的驱动下不断实现更新换代,由白炽灯到节能灯、卤素灯到 LED 灯照明产品实现了节能升级的同时,在舒适度上也得到更好的提升,照明效果也更加的多样化。作为绿色节能光源的代表,LED照明成为最具市场潜力的行业热点。
传统LED 封装使用环氧树脂作为封装材料,环氧树脂PPA(聚对苯二酰对苯二胺)粘接力非常好,热膨胀系数与PPA相近,封装后LED具有很高的可靠性,但这些封装胶内的交联剂和增粘剂中带有“氨基”,氨基是极容易引起发黄的,存在耐黄变性差的问题。
发明内容
本发明所要解决的技术问题:针对以环氧树脂为主要原料的封装胶中的交联剂和增粘剂中带有“氨基”,氨基是极容易引起发黄的,存在耐黄变性差的问题,提供了一种以盐酸催化水解自制甲基硅增粘剂,将增粘剂和硅树脂混合经生物改性脱除氨基得混合基胶,再将基胶与含氢硅油加成反应,辅以抗氧化剂,交联固化后即得耐黄变LED封装硅胶的方法。本发明制备的LED封装硅胶经生物酶改性后,脱除部分氨基,抗氧化性变强使其耐黄变性能增强,同时粘性提高,具有广阔的应用前景。
为了解决上述技术问题,本发明采用如下所述的技术方案:
(1)向带有搅拌器和回流装置的三口烧瓶中按体积比为2:3:1:5:3依次加入甲基三乙氧基硅烷、二甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、去离子水和浓度为0.5mol/L盐酸,将烧瓶移入50~70℃的水浴锅中,启动搅拌器搅拌反应3~5h;
(2)待上述反应结束,对烧瓶抽真空脱水1~2h,再加入反应物质量5~10%的复合硅烷偶联剂和反应物体积1/2的无水甲醇,升高水浴温度至80~85℃,继续保温搅拌反应4~6h,再将反应产物移入旋转蒸发器,在50~60℃下旋蒸浓缩至产物原体积的1/3,得到自制甲基硅增粘剂;所述的复合硅烷偶联剂为KH560和KH570按质量比为2:1复配制得;
(3)按质量比为80:1,称取苯基乙烯基硅树脂和上述自制甲基硅增粘剂混合均匀,得底物并装入陶瓷罐中,再向罐中加入底物总质量10~12%脱氨酶,用搅拌棒搅拌均匀,将陶瓷罐移入35~40℃恒温箱中,保温改性过夜,出料,得混合基胶;
(4)称取400~500g上述制得的混合基胶放入带有搅拌器和温度计的三口烧瓶中,按Si-H/Si-Vi比为1.4/1.0向烧瓶中加入浓度为7.5mmol/L苯基含氢硅油,再加入混合基胶总质量8~10%氯铂酸异丙醇作催化剂,放入恒温箱,在85~95℃下交联反应1~2h;
(5)待上述交联反应结束后,再向反应产物中加入产物质量20~25%抗坏血酸,混合搅拌10~20min后,得粘稠胶状物,将其注入聚四氟乙烯模具中,注模厚度为2~4cm,最后将模具放入烘箱先于70~80℃下预干燥40~60min,再在140~150℃下干燥2~3h后取出,拆模即得耐黄变LED封装硅胶。
本发明制备的耐黄变LED封装硅胶其拉伸强度为7.5~8.2MPa,断裂伸长率为195~240%,硬度达到75A以上,透光率达到95%以上,粘度达到5000~7500MPa·s。
本发明与其他方法相比,有益技术效果是:
(1)本发明制备的耐黄变LED封装硅胶不含“氨基”并加入抗氧化剂,使其耐黄变性提高17~25%,不易发黄;
(2)本发明制备的耐黄变LED封装硅胶粘度系数高,达到5000~7500MPa·s;
(3)本发明制备步骤简单,所需成本低。
具体实施方式
首先向带有搅拌器和回流装置的三口烧瓶中按体积比为2:3:1:5:3依次加入甲基三乙氧基硅烷、二甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、去离子水和浓度为0.5mol/L盐酸,将烧瓶移入50~70℃的水浴锅中,启动搅拌器搅拌反应3~5h;待上述反应结束,对烧瓶抽真空脱水1~2h,再加入反应物质量5~10%的复合硅烷偶联剂和反应物体积1/2的无水甲醇,升高水浴温度至80~85℃,继续保温搅拌反应4~6h,再将反应产物移入旋转蒸发器,在50~60℃下旋蒸浓缩至产物原体积的1/3,得到自制甲基硅增粘剂;所述的复合硅烷偶联剂为KH560和KH570按质量比为2:1复配制得;再按质量比为80:1,称取苯基乙烯基硅树脂和上述自制甲基硅增粘剂混合均匀,得底物并装入陶瓷罐中,再向罐中加入底物总质量10~12%脱氨酶,用搅拌棒搅拌均匀,将陶瓷罐移入35~40℃恒温箱中,保温改性过夜,出料,得混合基胶;接着称取400~500g上述制得的混合基胶放入带有搅拌器和温度计的三口烧瓶中,按Si-H/Si-Vi比为1.4/1.0向烧瓶中加入浓度为7.5mmol/L苯基含氢硅油,再加入混合基胶总质量8~10%氯铂酸异丙醇作催化剂,放入恒温箱,在85~95℃下交联反应1~2h;待上述交联反应结束后,再向反应产物中加入产物质量20~25%抗坏血酸,混合搅拌10~20min后,得粘稠胶状物,将其注入聚四氟乙烯模具中,注模厚度为2~4cm,最后将模具放入烘箱先于70~80℃下预干燥40~60min,再在140~150℃下干燥2~3h后取出,拆模即得耐黄变LED封装硅胶。
实例1
首先向带有搅拌器和回流装置的三口烧瓶中按体积比为2:3:1:5:3依次加入甲基三乙氧基硅烷、二甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、去离子水和浓度为0.5mol/L盐酸,将烧瓶移入70℃的水浴锅中,启动搅拌器搅拌反应5h;待上述反应结束,对烧瓶抽真空脱水2h,再加入反应物质量10%的复合硅烷偶联剂和反应物体积1/2的无水甲醇,升高水浴温度至85℃,继续保温搅拌反应6h,再将反应产物移入旋转蒸发器,在60℃下旋蒸浓缩至产物原体积的1/3,得到自制甲基硅增粘剂;所述的复合硅烷偶联剂为KH560和KH570按质量比为2:1复配制得;再按质量比为80:1,称取苯基乙烯基硅树脂和上述自制甲基硅增粘剂混合均匀,得底物并装入陶瓷罐中,再向罐中加入底物总质量12%脱氨酶,用搅拌棒搅拌均匀,将陶瓷罐移入40℃恒温箱中,保温改性过夜,出料,得混合基胶;接着称取500g上述制得的混合基胶放入带有搅拌器和温度计的三口烧瓶中,按Si-H/Si-Vi比为1.4/1.0向烧瓶中加入浓度为7.5mmol/L苯基含氢硅油,再加入混合基胶总质量10%氯铂酸异丙醇作催化剂,放入恒温箱,在95℃下交联反应2h;待上述交联反应结束后,再向反应产物中加入产物质量25%抗坏血酸,混合搅拌20min后,得粘稠胶状物,将其注入聚四氟乙烯模具中,注模厚度为4cm,最后将模具放入烘箱先于80℃下预干燥60min,再在150℃下干燥3h后取出,拆模即得耐黄变LED封装硅胶。经检测本发明制备的耐黄变LED封装硅胶不含“氨基”并加入抗氧化剂,使其耐黄变性提高25%,不易发黄;且胶粘度系数高,达到7500MPa·s。
实例2
首先向带有搅拌器和回流装置的三口烧瓶中按体积比为2:3:1:5:3依次加入甲基三乙氧基硅烷、二甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、去离子水和浓度为0.5mol/L盐酸,将烧瓶移入50℃的水浴锅中,启动搅拌器搅拌反应3h;待上述反应结束,对烧瓶抽真空脱水1h,再加入反应物质量5%的复合硅烷偶联剂和反应物体积1/2的无水甲醇,升高水浴温度至80℃,继续保温搅拌反应4h,再将反应产物移入旋转蒸发器,在50℃下旋蒸浓缩至产物原体积的1/3,得到自制甲基硅增粘剂;所述的复合硅烷偶联剂为KH560和KH570按质量比为2:1复配制得;再按质量比为80:1,称取苯基乙烯基硅树脂和上述自制甲基硅增粘剂混合均匀,得底物并装入陶瓷罐中,再向罐中加入底物总质量10%脱氨酶,用搅拌棒搅拌均匀,将陶瓷罐移入35℃恒温箱中,保温改性过夜,出料,得混合基胶;接着称取400g上述制得的混合基胶放入带有搅拌器和温度计的三口烧瓶中,按Si-H/Si-Vi比为1.4/1.0向烧瓶中加入浓度为7.5mmol/L苯基含氢硅油,再加入混合基胶总质量8%氯铂酸异丙醇作催化剂,放入恒温箱,在85℃下交联反应1h;待上述交联反应结束后,再向反应产物中加入产物质量20%抗坏血酸,混合搅拌10min后,得粘稠胶状物,将其注入聚四氟乙烯模具中,注模厚度为2cm,最后将模具放入烘箱先于70℃下预干燥40min,再在140℃下干燥2h后取出,拆模即得耐黄变LED封装硅胶。经检测本发明制备的耐黄变LED封装硅胶不含“氨基”并加入抗氧化剂,使其耐黄变性提高17%,不易发黄;且胶粘度系数高,达到5000MPa·s。
实例3
首先向带有搅拌器和回流装置的三口烧瓶中按体积比为2:3:1:5:3依次加入甲基三乙氧基硅烷、二甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、去离子水和浓度为0.5mol/L盐酸,将烧瓶移入60℃的水浴锅中,启动搅拌器搅拌反应4h;待上述反应结束,对烧瓶抽真空脱水1h,再加入反应物质量7%的复合硅烷偶联剂和反应物体积1/2的无水甲醇,升高水浴温度至82℃,继续保温搅拌反应5h,再将反应产物移入旋转蒸发器,在55℃下旋蒸浓缩至产物原体积的1/3,得到自制甲基硅增粘剂;所述的复合硅烷偶联剂为KH560和KH570按质量比为2:1复配制得;再按质量比为80:1,称取苯基乙烯基硅树脂和上述自制甲基硅增粘剂混合均匀,得底物并装入陶瓷罐中,再向罐中加入底物总质量11%脱氨酶,用搅拌棒搅拌均匀,将陶瓷罐移入37℃恒温箱中,保温改性过夜,出料,得混合基胶;接着称取450g上述制得的混合基胶放入带有搅拌器和温度计的三口烧瓶中,按Si-H/Si-Vi比为1.4/1.0向烧瓶中加入浓度为7.5mmol/L苯基含氢硅油,再加入混合基胶总质量9%氯铂酸异丙醇作催化剂,放入恒温箱,在90℃下交联反应2h;待上述交联反应结束后,再向反应产物中加入产物质量22%抗坏血酸,混合搅拌15min后,得粘稠胶状物,将其注入聚四氟乙烯模具中,注模厚度为3cm,最后将模具放入烘箱先于75℃下预干燥50min,再在145℃下干燥2h后取出,拆模即得耐黄变LED封装硅胶。经检测本发明制备的耐黄变LED封装硅胶不含“氨基”并加入抗氧化剂,使其耐黄变性提高20%,不易发黄;且胶粘度系数高,达到6000MPa·s。
Claims (1)
1.一种耐黄变LED封装硅胶的制备方法,其特征在于具体制备步骤为:
(1)向带有搅拌器和回流装置的三口烧瓶中按体积比为2:3:1:5:3依次加入甲基三乙氧基硅烷、二甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、去离子水和浓度为0.5mol/L盐酸,将烧瓶移入50~70℃的水浴锅中,启动搅拌器搅拌反应3~5h;
(2)待上述反应结束,对烧瓶抽真空脱水1~2h,再加入反应物质量5~10%的复合硅烷偶联剂和反应物体积1/2的无水甲醇,升高水浴温度至80~85℃,继续保温搅拌反应4~6h,再将反应产物移入旋转蒸发器,在50~60℃下旋蒸浓缩至产物原体积的1/3,得到自制甲基硅增粘剂;所述的复合硅烷偶联剂为KH560和KH570按质量比为2:1复配制得;
(3)按质量比为80:1,称取苯基乙烯基硅树脂和上述自制甲基硅增粘剂混合均匀,得底物并装入陶瓷罐中,再向罐中加入底物总质量10~12%脱氨酶,用搅拌棒搅拌均匀,将陶瓷罐移入35~40℃恒温箱中,保温改性过夜,出料,得混合基胶;
(4)称取400~500g上述制得的混合基胶放入带有搅拌器和温度计的三口烧瓶中,按Si-H/Si-Vi比为1.4/1.0向烧瓶中加入浓度为7.5mmol/L苯基含氢硅油,再加入混合基胶总质量8~10%氯铂酸异丙醇作催化剂,放入恒温箱,在85~95℃下交联反应1~2h;
(5)待上述交联反应结束后,再向反应产物中加入产物质量20~25%抗坏血酸,混合搅拌10~20min后,得粘稠胶状物,将其注入聚四氟乙烯模具中,注模厚度为2~4cm,最后将模具放入烘箱先于70~80℃下预干燥40~60min,再在140~150℃下干燥2~3h后取出,拆模即得耐黄变LED封装硅胶。
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CN108329475A (zh) * | 2018-01-30 | 2018-07-27 | 广东省石油与精细化工研究院 | 一种甲基苯基硅油的合成方法 |
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CN108329475A (zh) * | 2018-01-30 | 2018-07-27 | 广东省石油与精细化工研究院 | 一种甲基苯基硅油的合成方法 |
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