CN113549280A - 一种耐老化乙丙胶粉基eva热塑性弹性体密封件的制备方法 - Google Patents

一种耐老化乙丙胶粉基eva热塑性弹性体密封件的制备方法 Download PDF

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CN113549280A
CN113549280A CN202110948398.1A CN202110948398A CN113549280A CN 113549280 A CN113549280 A CN 113549280A CN 202110948398 A CN202110948398 A CN 202110948398A CN 113549280 A CN113549280 A CN 113549280A
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ethylene propylene
propylene rubber
thermoplastic elastomer
ethylene
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王艳秋
祝木伟
刘太闯
翁国文
柳峰
臧亚南
靳玲
姚亮
张小萍
徐云慧
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Xuzhou College of Industrial Technology
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Abstract

本发明公开了一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法，在200℃条件下对废旧乙丙橡胶胶粉进行活化30min；在常温下将顺丁橡胶塑炼5min，将活化后的乙丙橡胶精细胶粉与透明乙烯‑醋酸乙烯共聚物在捏合机中分散均匀，在160±5℃下在顺丁橡胶塑炼胶中加入上述混合料合炼均匀得到合炼塑胶；180℃下在双螺杆挤出机中在合炼塑胶中加入硫化剂、相容剂、氧化锌、硬脂酸、抗氧剂1010，分散均匀，胶粉、EVA树脂和各种配合剂进行交联反应，得到乙丙胶粉基EVA水管密封件用热塑性弹性体并模压成片。

Description

一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法
技术领域
本发明涉及高分子材料制备技术领域，具体涉及一种耐老化乙丙胶粉基EVA 热塑性弹性体密封件的制备方法。
背景技术
热塑性弹性体在橡胶制品的应用领域中占有越来越重要的地位，需求量也随之大幅提高。为了降低热塑性弹性体的成本和加大废旧轮胎的回收利用，促进热塑性弹性体推广应用，人们研究开发了胶粉基热塑性弹性体(RPTPE)。胶粉基热塑性弹性体是用胶粉与热塑性树脂共混制备的，其具有加工简单和加工成本较低的优点，加之胶粉的成本较低且其用量较大(一般占总质量的50％～90％),能大幅降低热塑性弹性体的成本。此外，胶粉可由废旧轮胎制得，这为解决废旧轮胎的“黑色”污染问题提供了新的途径，同时由于热塑性弹性体可循环利用，这符合我国可持续发展道路。因此胶粉基热塑性弹性体具有很好的发展前景。
目前胶粉基热塑性弹性体生产中存在以下共性问题：力学性能差；性能稳定性较差；价格昂贵；RPTPE气味大，不适于制作高档产品。
发明内容
本发明的目的是提供一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法，成本低廉，性能优良。
为实现上述目的，本发明采用的技术方案如下：一种耐老化乙丙胶粉基EVA 热塑性弹性体密封件的制备方法，由以下质量份的原料制成：
Figure RE-GDA0003249824530000011
Figure RE-GDA0003249824530000021
其制备方法，按如下步骤进行：
步骤1)在200℃条件下对废旧乙丙橡胶胶粉进行活化30min；
步骤2)在常温下将顺丁橡胶塑炼5min，再将步骤1)活化后的废旧乙丙橡胶胶粉与乙烯-醋酸乙烯共聚物在捏合机中分散均匀，并在160±5℃下加入顺丁橡胶塑炼胶中，再加入再生活化剂和松焦油混炼均匀得到合炼塑胶；
步骤3)180℃下向双螺杆挤出机中加入合炼塑胶、硫化剂、相容剂、氧化锌、硬脂酸、抗氧剂1010，分散均匀，借助动态交联体系和强烈的机械剪切应力进行交联反应，得到乙丙胶粉基EVA水管用热塑性弹性体，并模压成片。
作为本发明所述的一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法的优选方案：所述废旧乙丙橡胶胶粉的粒径为100目及以上。
作为本发明所述的一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法的优选方案：所述乙烯-醋酸乙烯共聚物采用颗粒状固体。
作为本发明所述的一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法的优选方案：所述硫化剂为硫磺。
作为本发明所述的一种耐老化乙丙胶粉基EVA热塑性弹性体密封件的制备方法的优选方案：所述相容剂为双叔丁基过氧化二异丙基苯。
与现有技术相比，本发明具有如下有益效果：
(1)本发明制备的耐老化乙丙胶粉基EVA水管用TPE的拉伸强度达10.5 MPa、扯断伸长率达778％、邵氏硬度为54-59；压缩永久变形17.90-24.53％、耐水性为2.28-4.12％；耐老化性热氧老化性硬度变化+1-+5、强度变化率为 -4.85-5.69％、伸长变化率为4.66-11.18％，耐臭氧老化性能优异均无裂纹。
(2)本发明采用活化后的100目及以上EPDM胶粉，100目以上的精细乙丙胶粉比乙丙橡胶与EVA、顺丁橡胶更容易分散均匀，在动态交联过程中不易粘螺杆，环保无污染，乙丙胶粉基EVA水管用TPE综合性能优异。
(3)本发明充分利用了废旧胶粉易分散的特性，解决了废旧乙丙橡胶直接丢弃而造成的环境污染问题，使废旧乙丙橡胶变废为宝，原材料成本降低了 45-55％，EPDM RP/EVA TPE利润比EPDM/EVA TPE增加了100％以上。
具体实施方式
下面结合具体实施例对本发明作进一步详细说明。
实施例1
将21Kg、100目及以上废旧乙丙橡胶粉在200℃条件下活化30min。
在常温下将4.5Kg、顺丁橡胶塑炼5min，将上述活化后的100目及以上的乙丙橡胶精细胶粉与4.5Kg透明EVA颗粒在捏合机中分散均匀，在160+5℃下在顺丁橡胶塑炼胶中加入上述混合料合炼均匀得到合炼塑胶。
180℃下在双螺杆挤出机中在合炼塑胶中加入0.09Kg、硫磺，0.33Kg、相容剂BIBP，1.5Kg、氧化锌，0.09Kg、硬脂酸，0.09Kg、抗氧剂1010，分散均匀，借助动态交联体系和强烈的机械剪切应力进行交联反应，得到乙丙胶粉基 EVA水管用热塑性弹性体，并模压成片。
实施例2
将21Kg 100目及以上废旧乙丙橡胶粉在200℃条件下活化30min。
在常温下将3.0Kg顺丁橡胶塑炼5min，将上述活化后的100目及以上的乙丙橡胶精细胶粉与6.0Kg透明乙烯-醋酸乙烯共聚物EVA颗粒在捏合机中分散均匀，在160+5℃下在顺丁橡胶塑炼胶中加入上述混合料合炼均匀得到合炼塑胶。
180℃下在双螺杆挤出机中在合炼塑胶中加入0.09Kg硫磺、0.33Kg相容剂 BIBP、1.5Kg氧化锌、0.09Kg硬脂酸、0.09Kg抗氧剂1010等配合剂分散均匀，胶粉、塑料树脂和各种配合剂反应配混时借助动态交联体系和强烈的机械剪切应力进行交联反应，得到乙丙胶粉基EVA水管用热塑性弹性体，并模压成片。
实施例3
将18Kg 100目及以上废旧乙丙橡胶粉在200℃条件下活化30min。
在常温下将6.0Kg顺丁橡胶塑炼5min，将上述活化后的100目及以上的乙丙橡胶精细胶粉与6.0Kg透明EVA颗粒在捏合机中分散均匀，在160+5℃下在顺丁橡胶塑炼胶中加入上述混合料合炼均匀得到合炼塑胶。
180℃下在双螺杆挤出机中在合炼塑胶中加入0.09Kg、硫磺，0.33Kg、相容剂BIBP，1.5Kg、氧化锌，0.09Kg、硬脂酸，0.09Kg、抗氧剂1010，分散均匀，借助动态交联体系和强烈的机械剪切应力进行交联反应，得到乙丙胶粉基 EVA水管用热塑性弹性体，并模压成片。
根据GB/T21874-2008进行性能检测，
表1乙丙胶粉基EVA水管用热塑性弹性体密封件的性能
Figure RE-GDA0003249824530000041
由表1可知，本发明制备的乙丙胶粉基EVA水管用热塑性弹性体的性能指标都远远超过和达到国标GB/T21874-2008《弹性体密封件排水管道接口密封件材料要求热塑性弹性体》的要求。

Claims (5)

1.一种耐老化乙丙胶粉基EVA水管用热塑性弹性体密封件的制备方法，其特征在于：由以下质量份的原料制成：
乙烯-醋酸乙烯共聚物 15-20份，
顺丁橡胶 10-20份，
废旧乙丙橡胶胶粉 60-70份，
再生活化剂510 2.0份，
松焦油 15.0份，
相容剂 0.8-1.3份，
硫化剂 0.3份，
氧化锌 5.0份，
硬脂酸 0.3份，
抗氧剂1010 0.3份；
其制备方法，按如下步骤进行：
步骤1）在200℃条件下对废旧乙丙橡胶胶粉进行活化30min；
步骤2）在常温下将顺丁橡胶塑炼5min，再将步骤1）活化后的废旧乙丙橡胶胶粉与乙烯-醋酸乙烯共聚物在捏合机中分散均匀，并在160±5℃下加入顺丁橡胶塑炼胶中，再加入再生活化剂和松焦油混炼均匀得到合炼塑胶；
步骤3）180℃下向双螺杆挤出机中加入合炼塑胶、硫化剂、相容剂、氧化锌、硬脂酸、抗氧剂1010，分散均匀，借助动态交联体系和强烈的机械剪切应力进行交联反应，得到乙丙胶粉基EVA水管用热塑性弹性体，并模压成片。
2.根据权利要求1所述的一种耐老化乙丙胶粉基EVA水管用热塑性弹性体密封件的制备方法，其特征在于：所述废旧乙丙橡胶胶粉的粒径为100目及以上。
3.根据权利要求1所述的一种耐老化乙丙胶粉基EVA水管用热塑性弹性体密封件的制备方法，其特征在于：所述乙烯-醋酸乙烯共聚物采用颗粒状固体。
4.根据权利要求1所述的一种耐老化乙丙胶粉基EVA水管用热塑性弹性体密封件的制备方法，其特征在于：所述硫化剂为硫磺。
5.根据权利要求1所述的一种耐老化乙丙胶粉基EVA水管用热塑性弹性体密封件的制备方法，其特征在于：所述相容剂为双叔丁基过氧化二异丙基苯。
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CN117209947A (zh) * 2023-09-26 2023-12-12 广州美村橡胶科技股份有限公司 一种水管密封用复合改性三元乙丙橡胶材料及其制备方法

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GB2610017A (en) * 2021-08-18 2023-02-22 Xuzhou College Ind Technology Preparation method of ethylene propylene rubber (EPR) powder-based ethylene-vinyl acetate (EVA) anti-aging thermoplastic elastomer (TPE) seal for water pipe
GB2610017B (en) * 2021-08-18 2023-10-11 Xuzhou College Ind Technology Preparation method of ethylene propylene rubber (EPR) powder-based ethylene-vinyl acetate (EVA) anti-agin thermoplastic elastomer (TPE) seal for water pipe
CN117209947A (zh) * 2023-09-26 2023-12-12 广州美村橡胶科技股份有限公司 一种水管密封用复合改性三元乙丙橡胶材料及其制备方法
CN117209947B (zh) * 2023-09-26 2024-03-15 广州美村橡胶科技股份有限公司 一种水管密封用复合改性三元乙丙橡胶材料及其制备方法

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