MQ硅树脂对有机硅压敏胶性能的影响  

Influence of MQ Silicone Resin on Properties of Silicone Pressure Sensitive Adhesives

作　　者：齐健康 王军 岳胜武 QI Jiankang;WANG Jun;YUE Shengwu(Shenzhen Kanglibang Technology Co.,Ltd.,Shenzhen 518000,Guangdong)

机构地区：[1]深圳康利邦科技有限公司,广东深圳518000

出　　处：《有机硅材料》2022年第5期40-46,56,共8页Silicone Material

摘　　要：分别以正硅酸乙酯、聚硅酸乙酯和水玻璃作为Q链节来源制得3种MQ硅树脂,依次命名为MQ-A、MQ-B和MQ-C。将MQ硅树脂与甲基乙烯基硅橡胶生胶、交联剂、抑制剂、铂金催化剂混合均匀后制得有机硅压敏胶。表征了MQ硅树脂的摩尔质量及其分布,探讨了MQ硅树脂用量和M链节与Q链节物质的量之比(M/Q值)对有机硅压敏胶性能的影响。结果表明:当M/Q值相同时,平均摩尔质量从小到大依次为MQ-A<MQ-B<MQ-C,摩尔质量分布的均一性由高到低依次为MQ-A>MQ-B>MQ-C。以正硅酸乙酯和聚硅酸乙酯为原料时,MQ硅树脂收率很高,采用水玻璃法制得的MQ硅树脂收率较低;采用MQ-A硅树脂的有机硅压敏胶,当硅树脂用量在50~250份时,随着硅树脂用量的增加,有机硅压敏胶剥离力和初粘力逐渐上升。在硅树脂用量相同的条件下,随着M/Q值从0.65升至0.85,有机硅压敏胶的剥离力逐渐下降,但初粘力逐渐上升;采用MQ-B硅树脂的有机硅压敏胶,当M/Q值为0.75、0.85,硅树脂用量在50~250份时,随着硅树脂用量的增加,有机硅压敏胶的剥离力和初粘力逐渐上升。但当M/Q值降至0.65、硅树脂用量为250份时,有机硅压敏胶几乎无初粘力,剥离力也大幅降低;采用MQ-C硅树脂的有机硅压敏胶,当M/Q值为0.65、硅树脂用量在150~200份时出现剥离力和初粘力下降的拐点,当M/Q值为0.75、硅树脂用量在200~250份时出现剥离力和初粘力下降的拐点,当M/Q值为0.85、硅树脂用量在50~250份时未出现剥离力和初粘力下降的拐点;采用MQ-B3硅树脂制备的有机硅压敏胶兼具较高的初粘力和剥离力,可用于贴合开孔泡棉、网纹膜涂布和替代过氧化苯甲酰固化体系压敏胶。Three types of MQ silicone resin were prepared with ethyl orthosilicate,ethyl polysilicate and sodium silicate as the source of Q chain,which were named as MQ-A,MQ-B and MQ-C in turn.The silicone pressure sensitive adhesive(PSA)was prepared by mixing methyl vinyl silicone rubber,crosslinking agent,inhibitor and platinum catalyst.The molar mass and distribution of MQ silicone were characterized,and the effect of the amount of MQ silicone and the ratio of chain M to chain Q(M/Q value)on the performance of silicone PSA was discussed.The results show that when M/Q value keeps the same,the average molar mass is as follows:MQ-A<MQ-B<MQ-C,and the homogeneity of the molar mass distribution is as follows:MQ-A>MQ-B>MQ-C.With ethyl orthosilicate and polyethyl silicate as raw materials,the yield of MQ silicone resin is high,the yield of MQ silicone resin is low by sodium silicate method.The silicone PSA using MQ-A silicone resin has the increasing peeling force and initial adhesion,when the amount of silicone resin is 50-250 phr.Under the same amount of silicone resin,as the M/Q value increases from 0.65 to 0.85,the peel force of the silicone PSA gradually decreases,conversely the initial adhesion gradually increaseds.The peeling force and initial adhesion force of the silicone PSA prepared with MQ-B silicone resin gradually increases with the increase of the silicone resin when M/Q value is 0.75 and 0.85,50-250 phr silicone resin.However,when M/Q value is 0.65,250 phr of silicone resin,the silicone PSA has almost no initial adhesion and weak peeling force.Using silicone PSA prepared with MQ-C silicone resin,M/Q value of 0.65,there is an inflection point of peeling force and initial adhesion decline when the 150-200 phr silicone resin is used.When M/Q value is 0.75,there is an inflection point of peeling force and initial adhesion decline when the silicone resin is 200-250phr.When M/Q value is 0.85,the amount of silicone resin is 50~250 phr,there is no inflection point of the peeling force and initial tack force decrease.The

关 键 词：MQ硅树脂 有机硅 压敏胶 剥离力 初粘力 

分 类 号：TQ324.21[化学工程—合成树脂塑料工业]