CN117143556A - 一种扬声器用耐高温uv胶及其制备方法 - Google Patents
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Abstract
本发明公开了一种扬声器用耐高温UV胶及其制备方法,其包括按重量份计的如下组分:光固化树脂30%~80%;活性稀释剂15%~55%;光引发剂3%~8%;附着力促进剂2%~7%,通过将树脂、活性稀释剂、光引发剂以及附着力促进剂在室温下,进行混合并搅拌,搅拌均匀即得UV胶粘剂,上述制备方法在非介入式均质机进行,上述的搅拌中,搅拌的转速为公转:自转=1200:600,搅拌时间为10min,搅拌环境为真空环境。本发明提供的扬声器用耐高温UV胶具有高粘接性、快速成型、高耐温的特性,能在扬声器组装中对音圈音膜部件保持较好的粘接性能,并且施工简单,瞬间固化,符合节能减排的趋势,适合大规模的生产制造。
Description
技术领域
本发明涉及胶粘剂技术领域,具体为一种扬声器用耐高温UV胶及其制备方法。
背景技术
宋麦丽,傅利坤.SiC先驱体——聚碳硅烷的应用研究进展[J].中国材料进展,2013,32(04):243-248。
文献中对聚碳硅烷的合成、研究以及应用等相关信息做出了阐述,目前主要应用于陶瓷、纤维等材料当中,其耐热性能优异,目前尚未发现用于改性聚氨酯丙烯酸树脂当中。目前用于改性聚氨酯的有机硅高分子主要是硅烷偶联剂、氨基硅烷等等。
UV胶粘剂以其环保、节能减排、固化快以及操作简单方便等优点被应用于多个领域。其主要是由树脂、单体以及光引发剂组成,后续可根据性能要求添加各类助剂。UV胶粘剂在合适的紫外光波长下引发自由基的生成,从而完成固化,整个过程仅需几秒钟。正因优点众多且符合环保理念,UV胶粘剂的应用越来越广泛。
在扬声器的组装过程中,部件粘接是很重要的一个环节,而对于粘接扬声器中心部位(音圈、纸盆和弹簧板)的中心胶更是要求甚高。扬声器根据其功率不同,振动强度不同,发热的程度也不相同,其对中心胶的耐高温性能要求更高。中心胶主要粘接基材为Al和PI材料,而目前使用的中心胶大多为AB胶,其节能减排效果差;对于Al等金属材料粘接力不够;气味比较大且难闻;耐温性上也达不到很高的温度。
发明内容
(一)解决的技术问题
鉴于此,本发明提供了一种扬声器用耐高温UV胶及其制备方法,其解决了现有中心胶无法同时兼顾耐高温、节能减排以及对Al等金属粘接力不佳的技术问题。
(二)技术方案
本发明解决技术问题,采用如下技术方案:
一种扬声器用耐高温UV胶,包括包括按重量份计的如下组分:
光固化树脂30%~80%;
活性稀释剂15%~55%;
光引发剂3%~8%;
附着力促进剂2%~7%。
优选的,所述光固化树脂的制备方法,包括如下步骤:S1:在装有聚四氟搅拌桨、温度计以及真空泵的三口烧瓶中加入适量的聚丙二醇,在温度范围110℃-120℃、真空度≥-0.095MPa的条件下,搅拌脱水1.5h-2h。
S2:在装有聚四氟搅拌桨、恒压漏斗、蛇形冷凝管及氮气管道的四口烧瓶中,加入20%-70%的聚丙二醇(已真空脱水)及5%-20%的聚碳硅烷,通入氮气,在氮气环境下,设置温度范围为55-75℃,在恒压漏斗中缓慢滴加30%-80%液化MDI,反应2-5h,合成含聚碳硅烷的由异氰酸酯基封端的聚氨酯预聚体。
S3:持续通入氮气,将温度设置为60-80℃,按照顺序依次添加20%-70%的甲基丙烯酸羟乙酯和0.01%-0.04%的催化剂二月桂酸二丁基锡,反应1.5-3h,制得聚碳聚氨酯丙烯酸树脂。
优选的,所述光固化树脂包含上述的聚碳聚氨酯丙烯酸树脂,根据本发明的一个优选改进方面,光固化树脂的重量百分比为40%~70%。
优选的,所述光固化树脂中聚碳聚氨酯丙烯酸树脂与其他树脂的质量比为4:1,其他光固化树脂为纯丙烯酸树脂、环氧丙烯酸树脂、聚氨酯丙烯酸树脂、聚酯丙烯酸树脂、聚醚丙烯酸树脂中的一种或多种以任意比例混合。
优选的,所述活性稀释剂的重量百分比为20%~50%。
优选的,所述活性稀释剂选自丙烯酸异冰片酯、乙氧基乙氧基乙基丙烯酸酯、丙烯酰吗啉、3,5,5-三甲基己基丙烯酸酯、N,N-二甲基乙酰基乙酰胺、月桂酸丙烯酸酯、异癸基丙烯酸酯、异壬基丙烯酸酯中的一种或多种以任意比例混合,所述光引发剂的重量百分比为3%~5%。
优选的,所述光引发剂为自由基光引发剂,选自二苯基(2,4,6-三甲基苯甲酰基)氧化膦、1-羟环己基苯酮、安息香缩甲醚、2,4,6-三甲基苯甲酰基膦酸乙酯中的一种或多种以任意比例混合。
优选的,所述附着力促进剂选自磷酸酯丙烯酸酯、丙烯酸、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、β-丙烯酰氧基丙酸中的一种或多种以任意比例混合。
一种扬声器用耐高温UV胶制备方法,根据权利要求1-8任意一条所述的用于扬声器耐高温UV胶的制备方法包括以下步骤:将树脂、活性稀释剂、光引发剂以及附着力促进剂在室温下,进行混合并搅拌,搅拌均匀即得UV胶粘剂。
优选的,上述制备方法在非介入式均质机进行,上述的搅拌中,搅拌的转速为公转:自转=1200:600,搅拌时间为10min,搅拌环境为真空环境。
(三)有益效果
本发明具有以下有益效果:本发明在UV胶粘剂体系中加入了聚碳硅烷,可以有效地提高耐温性,并保证胶粘剂的粘接力以及稳定性。本发明提供的用于扬声器的耐高温UV胶具有高粘接性、快速成型、高耐温的特性,胶粘剂拉伸强度为25MPa,断裂伸长率为237%,能够在保持柔韧性的同时,实现PC片和铝片粘接后剪切强度达到6.3MPa,并且在高温也能保持较好的粘接强度。
具体实施方式
下面将结合本发明的实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例一:一种光固化树脂的制备方法,包括如下步骤:
1.在装有聚四氟搅拌桨、温度计以及真空泵的三口烧瓶中加入适量的聚丙二醇,在温度范围120℃、真空度≥-0.095MPa的条件下,真空脱水2h。
2.在装有聚四氟搅拌桨、恒压漏斗、蛇形冷凝管及氮气管道的四口烧瓶中,加入30%的聚丙二醇(已真空脱水)及10%的聚碳硅烷,通入氮气,在氮气环境下,设置温度为75℃,在恒压漏斗中缓慢滴加60%液化MDI,反应2h,合成含聚碳硅烷的由异氰酸酯基封端的聚氨酯预聚体。
3.持续通入氮气,将温度设置为80℃,按照顺序依次添加30%的甲基丙烯酸羟乙酯和0.02%的催化剂二月桂酸二丁基锡,反应2h,制得聚碳聚氨酯丙烯酸树脂。
一种用于扬声器的耐高温UV胶,由以下重量百分比的原料组成:在非介入式均质机的搅拌容器中加入实施例1制备的32%的聚碳聚氨酯丙烯酸树脂以及8%的聚酯丙烯酸树脂,然后再加入丙烯酰吗啉35%和3,3,5-三甲基己基丙烯酸酯20%,再向其中加入3%光引发剂1-羟环己基苯酮以及2%的附着力促进剂β-丙烯酰氧基丙酸,搅拌温度为常温,搅拌环境为真空环境,设置搅拌速度为公转:自转=1200:600,搅拌时间为10min。最终制得UV胶粘剂。
实施例二:一种用于扬声器的耐高温UV胶,由以下重量百分比的原料组成:在非介入式均质机的搅拌容器中加入实施例1制备的40%的聚碳聚氨酯丙烯酸树脂以及10%的环氧丙烯酸树脂,然后再加入丙烯酰吗啉35%和乙氧基乙氧基乙基丙烯酸酯10%,再向其中加入3%光引发剂二苯基(2,4,6-三甲基苯甲酰基)氧化膦以及2%的附着力促进剂丙烯酸,搅拌温度为常温,搅拌环境为真空环境,设置搅拌速度是公转:自转=1200:600,搅拌时间为10min。最终制得UV胶粘剂。
实施例三:一种用于扬声器的耐高温UV胶,由以下重量百分比的原料组成:在非介入式均质机的搅拌容器中加入实施例1制备的56%的聚碳聚氨酯丙烯酸树脂以及14%的聚醚丙烯酸树脂,然后再加入丙烯酸异冰片酯15%和乙氧基乙氧基乙基丙烯酸酯10%,再向其中加入3%光引发剂2,4,6-三甲基苯甲酰基膦酸乙酯以及2%的附着力促进剂磷酸酯丙烯酸酯,搅拌温度为常温,搅拌环境为真空环境,设置搅拌速度是公转:自转=1200:600,搅拌时间为10min。最终制得UV胶粘剂。
对比例1
市售UV胶1,上海某公司产品紫外光固化胶,MSDS(化学品安全说明书)表明,该UV胶包含聚氨酯丙烯酸树脂,聚酯丙烯酸树脂、丙烯酰吗啉、3,3,5-三甲基己基丙烯酸酯等。
对比例2
市售AB胶,广东某公司产品,专门用于扬声器中音圈、弹波、鼓纸的粘接。
上述实施例1-3各组分及含量请见表1,上述实施例1-3和对比1-2综合性能对比参数请见表2。
带温粘接强度测试:测试仪器拉力机(HZ-1003C),将铝片与PC片以10mm×20mm的粘接面积进行搭接,分别测试在常温以及高温情况下的剪切强度。
高温老化试验:测试仪器马弗炉(YZ788),将粘接好的Al/PC样品置于温度为120℃的马弗炉中烘烤100h,取出后测试样品的粘接强度。
冷热冲击试验:测试仪器快速温变箱,设置条件为-40至80℃,变温速率20℃/min,每个循环1h,将粘接好的Al/PC样品置于箱中,总计100h,取出后测试样品的粘接强度。
高温高湿试验:设置试验箱条件为85℃、85%RH,将粘接好的Al/PC样品置于箱中,试验100h,取出后测试样品的粘接强度。
表1
表2
通过对比发现:对比例1、对比例2对于Al的粘接强度均低于实施例。市售的UV胶(对比例1)以及AB胶(对比例2),不耐高温,在高温时出现粘接力下降的现象;市售的扬声器用AB胶(对比例2),在固化工艺上,耗时太长、耗能太大,不符合节能减排的趋势。本发明提供的扬声器用耐高温UV胶,能在扬声器组装中对音圈音膜部件保持较好的粘接性能。并且施工简单,瞬间固化,符合节能减排的趋势,适合大规模的生产制造。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (10)
1.一种扬声器用耐高温UV胶,其特征在于,包括包括按重量份计的如下组分:
光固化树脂30%~80%;
活性稀释剂15%~55%;
光引发剂3%~8%;
附着力促进剂2%~7%。
2.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述光固化树脂的制备方法,包括如下步骤:
S1:在装有聚四氟搅拌桨、温度计以及真空泵的三口烧瓶中加入适量的聚丙二醇,在温度范围110℃-120℃、真空度≥-0.095MPa的条件下,搅拌脱水1.5h-2h。
S2:在装有聚四氟搅拌桨、恒压漏斗、蛇形冷凝管及氮气管道的四口烧瓶中,加入20%-70%的聚丙二醇(已真空脱水)及5%-20%的聚碳硅烷,通入氮气,在氮气环境下,设置温度范围为55-75℃,在恒压漏斗中缓慢滴加30%-80%液化MDI,反应2-5h,合成含聚碳硅烷的由异氰酸酯基封端的聚氨酯预聚体。
S3:持续通入氮气,将温度设置为60-80℃,按照顺序依次添加20%-70%的甲基丙烯酸羟乙酯和0.01%-0.04%的催化剂二月桂酸二丁基锡,反应1.5-3h,制得聚碳聚氨酯丙烯酸树脂。
3.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述光固化树脂包含上述的聚碳聚氨酯丙烯酸树脂,根据本发明的一个优选改进方面,光固化树脂的重量百分比为40%~70%。
4.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述光固化树脂中聚碳聚氨酯丙烯酸树脂与其他树脂的质量比为4:1,其他光固化树脂为纯丙烯酸树脂、环氧丙烯酸树脂、聚氨酯丙烯酸树脂、聚酯丙烯酸树脂、聚醚丙烯酸树脂中的一种或多种以任意比例混合。
5.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述活性稀释剂的重量百分比为20%~50%。
6.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述活性稀释剂选自丙烯酸异冰片酯、乙氧基乙氧基乙基丙烯酸酯、丙烯酰吗啉、3,5,5-三甲基己基丙烯酸酯、N,N-二甲基乙酰基乙酰胺、月桂酸丙烯酸酯、异癸基丙烯酸酯、异壬基丙烯酸酯中的一种或多种以任意比例混合,所述光引发剂的重量百分比为3%~5%。
7.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述光引发剂为自由基光引发剂,选自二苯基(2,4,6-三甲基苯甲酰基)氧化膦、1-羟环己基苯酮、安息香缩甲醚、2,4,6-三甲基苯甲酰基膦酸乙酯中的一种或多种以任意比例混合。
8.根据权利要求1所述的一种扬声器用耐高温UV胶,其特征在于:所述附着力促进剂选自磷酸酯丙烯酸酯、丙烯酸、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、β-丙烯酰氧基丙酸中的一种或多种以任意比例混合。
9.一种扬声器用耐高温UV胶制备方法,其特征在于:根据权利要求1-8任意一条所述的用于扬声器耐高温UV胶的制备方法包括以下步骤:将树脂、活性稀释剂、光引发剂以及附着力促进剂在室温下,进行混合并搅拌,搅拌均匀即得UV胶粘剂。
10.根据权利要求9所述的一种扬声器用耐高温UV胶制备方法,其特征在于:上述制备方法在非介入式均质机进行,上述的搅拌中,搅拌的转速为公转:自转=1200:600,搅拌时间为10min,搅拌环境为真空环境。
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