CN108641631A - 一种自粘型隔音膨胀胶及其制备方法 - Google Patents
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Abstract
本发明提供一种自粘型隔音膨胀胶,其按重量份的组成为:丁基橡胶100份,填料碳酸钙300~500份,加工油30~50份,聚异丁烯70~100份,增粘树脂10~30份,防老剂2~5份,炭黑10~20份,膨胀微珠10~15份,钴盐2‑4份。其制备方法为:将丁基橡胶和部分填料碳酸钙在捏合机中捏合10分钟后,加入聚异丁烯、防老剂、炭黑、加工油和剩余的填料碳酸钙,捏合30分钟;加入增粘树脂和钴盐,继续捏合30分钟;加入膨胀微珠,捏合1小时;通过螺杆挤出机挤出、压延和覆膜,得到自粘型隔音膨胀胶。其与其他部件接触时初粘性良好;不发生交联,可以在高温条件下持续保持优异的粘结性。
Description
技术领域
本发明属于膨胀胶技术领域,具体涉及一种自粘型隔音膨胀胶及其制备方法。
背景技术
传统的汽车用隔音膨胀胶大多采用EPDM(三元乙丙橡胶)作为主体,加入各种助剂、填料、交联剂,通过密炼、成型而成,在使用过程需要通过胶黏剂或者粘结层与汽车部件结合。现有技术具有以下缺陷和不足:
1.目前的隔音膨胀胶和汽车部件粘结主要依靠胶黏剂,首先,胶黏剂成本较高,同时在生产过程中增加了数道生产工序,增加了加工成本和作业难度;其次,使用过程中可能产生胶黏剂与膨胀胶的结合失效问题,降低了使用安全性。
2.膨胀胶生产过程中增加粘结层也可以起到粘结效果,但是两者配方差异较大,生产设备不同,大大增加了同时生产的难度和成本,在使用过程中也容易产生粘结层和膨胀胶脱落的问题。
发明内容
本发明的目的是提供一种工艺简单、产品失效风险低的自粘型隔音膨胀胶,以解决隔音膨胀胶和汽车部件的粘接问题。
本发明提供了如下的技术方案:
本发明的自粘型隔音膨胀胶按重量份的组成为:
丁基橡胶 100份
填料碳酸钙 300~500份
加工油 30~50份
聚异丁烯 70~100份
增粘树脂 10~30份
防老剂 2~5份
炭黑 10~20份
膨胀微珠 10~15份
钴盐 2-4份
优选地,加工油为环烷基油或者石蜡基油。
优选地,增粘树脂为C5石油树脂或者萜烯树脂或者203树脂或者癸酸钴树脂。
优选地,防老剂为N-苯基-β-萘胺(即防老剂D)。
优选地,膨胀微珠为MSH-550。
本发明提供一种自粘型隔音膨胀胶的制备方法,具体如下:
1、将丁基橡胶和100-200份的填料碳酸钙进行捏合,在捏合机中分散10min后,加入聚异丁烯、防老剂、炭黑、加工油和200-400份的填料碳酸钙,捏合30min,捏合温度不超过60℃;
2、加入增粘树脂和钴盐,继续捏合30min;
3、加入膨胀微珠,捏合1h;
4、通过螺杆挤出机挤出、压延和覆膜,得到自粘型隔音膨胀胶。
本发明的有益效果是:
1、本发明的自粘型隔音膨胀胶,添加增粘树脂和钴盐,使自粘型隔音膨胀胶在与其他部件接触时粘性远远大于普通的非自粘型膨胀胶;同时不发生交联,可以使膨胀胶在高温等条件下均保证优异的粘结性,产品粘接失效风险低。
2、配方中添加膨胀微珠MSH-550,使得配方在保持体系和加工方法不变动的情况下,可以有效地膨胀,并且可以随时调整膨胀微珠用量以满足不同的使用条件。
3、通过选择丁基橡胶,气密性好,耐热、臭氧老化,耐腐蚀性好,能够在使用过程中提供优良的抗老化性能,提升产品的稳定性和使用寿命。
4、本发明的自粘型隔音膨胀胶制备方法将各组分多次捏合并挤出,工艺简单。
具体实施方式
自粘型隔音膨胀胶以丁基橡胶为主料,并混有填料、增粘剂、膨胀剂、加工油、防老剂,利用捏合机多次捏合、最后利用螺杆挤出机挤出而成。
实施例一、本实施例的自粘型隔音膨胀胶的配方为:
组分 配合比(重量份)
丁基橡胶 100份
填料碳酸钙 300份
加工油 30份
聚异丁烯 70份
增粘树脂 10份
防老剂 2份
炭黑 20份
膨胀微珠 10份
钴盐 2份。
其中,加工油为环烷基油,增粘树脂为C5石油树脂,防老剂为N-苯基-β-萘胺,膨胀微珠为MSH-550。
实施例二、本实施例的自粘型隔音膨胀胶的配方为:
组分 配合比(重量份)
丁基橡胶 100份
填料碳酸钙 500份
加工油 50份
聚异丁烯 100份
增粘树脂 30份
防老剂 5份
炭黑 15份
膨胀微珠 15份
钴盐 4份。
其中,加工油为环烷基油,增粘树脂为萜烯树脂,防老剂为N-苯基-β-萘胺,膨胀微珠为MSH-550。
实施例三、本实施例的自粘型隔音膨胀胶的配方为:
组分 配合比(重量份)
丁基橡胶 100份
填料碳酸钙 400份
加工油 450份
聚异丁烯 90份
增粘树脂 25份
防老剂 4份
炭黑 10份
膨胀微珠 13份
钴盐 4份。
其中,加工油为石蜡基油,增粘树脂为203树脂或者癸酸钴树脂,防老剂为N-苯基-β-萘胺,膨胀微珠为MSH-550。
本发明的自粘型隔音膨胀胶的制备方法如下:
1、将丁基橡胶和100-200份的填料碳酸钙进行捏合,在捏合机中分散约10min后,加入聚异丁烯、防老剂、炭黑、加工油和200-400份的填料碳酸钙,捏合约30min,捏合温度不超过60℃;
2、加入增粘树脂和钴盐,继续捏合30min;
3、加入膨胀微珠,捏合1h;
4、通过螺杆挤出机挤出、压延和覆膜,得到自粘型隔音膨胀胶。
对传统的隔音膨胀胶以及以上各实施例的隔音膨胀胶进行检测对比,结果如表1:
表1
由表1可见,实施例一至实施例三的自粘型隔音膨胀胶相比于传统的胶黏剂型膨胀胶和粘结层型膨胀胶:首先,具有更好的初粘性,从而与汽车上的其他部件接触时,其粘性和粘贴品质远远优于传统的膨胀胶;其次,在破坏性的极限高温测试中可长时间不脱落,从而保证了在实际的高温使用环境中(通常不超过80℃),保持良好的粘贴效果;再次,具有更高的膨胀倍率,实施例一至实施例三的自粘型隔音膨胀胶的膨胀倍率至少是传统的膨胀胶的1.45倍。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。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 (6)
1.一种自粘型隔音膨胀胶,其特征在于,所述自粘型隔音膨胀胶按重量份的组成为:
2.根据权利要求1所述的自粘型隔音膨胀胶,其特征在于,所述加工油为环烷基油或者石蜡基油。
3.根据权利要求1所述的自粘型隔音膨胀胶,其特征在于,所述增粘树脂为C5石油树脂或者萜烯树脂或者203树脂或者癸酸钴树脂。
4.根据权利要求1所述的自粘型隔音膨胀胶,其特征在于,所述防老剂为N-苯基-β-萘胺。
5.根据权利要求1所述的自粘型隔音膨胀胶,其特征在于,所述膨胀微珠为MSH-550。
6.权利要求1至5中任一项所述的自粘型隔音膨胀胶的制备方法,其特征在于,步骤一:将配方量的丁基橡胶和100-200份的填料碳酸钙进行捏合,在捏合机中分散10min后,加入配方量的聚异丁烯、防老剂、炭黑、加工油和200-400份的填料碳酸钙,捏合30min,捏合温度不超过60℃;步骤二:加入配方量的增粘树脂和钴盐,继续捏合30min;步骤三:加入配方量的膨胀微珠,捏合1h;步骤四:通过螺杆挤出机挤出、压延和覆膜,得到所述自粘型隔音膨胀胶。
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CN112521885A (zh) * | 2020-11-18 | 2021-03-19 | 科建高分子材料(上海)股份有限公司 | 一种高从形性通讯电缆用半导电自粘带 |
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