CN104419082A - 耐热乙丙绝缘橡皮 - Google Patents

耐热乙丙绝缘橡皮 Download PDF

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CN104419082A
CN104419082A CN201310408675.5A CN201310408675A CN104419082A CN 104419082 A CN104419082 A CN 104419082A CN 201310408675 A CN201310408675 A CN 201310408675A CN 104419082 A CN104419082 A CN 104419082A
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rubber
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ethylene propylene
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余望野
何文芳
虞洪济
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SHANGHAI MINING CABLE FACTORY CO Ltd
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract

一种耐热乙丙绝缘橡皮，由乙丙橡胶、氧化锌、微晶石蜡、硬脂酸、汽缸油、二氧化硅、滑石粉、轻质碳酸钙、2-硫醇基苯并咪唑、过氧化二异丙苯、乙烯基三（β-甲氧基乙氧基）硅烷、三聚氰酸三烯丙脂、三盐基性硫酸铅、二盐基性亚磷酸铅组成。本发明还提供了上述耐热乙丙绝缘橡皮的制备方法。本发明采用经硅氧烷改性乙丙橡胶来提高其耐热性，加入抗氧剂可使经聚硅氧烷改性的三元乙丙橡胶的耐高温性能进一步提高。实验证明，本发明长期工作温度可达到125℃，最低敷设温度为-40℃，解决了现有技术中用于矿山的电缆护套极易老化、造成绝缘破坏的技术问题。同时，电缆可在受矿物油和燃料油污染的场合使用。本发明具有低烟无卤、成束阻燃的特性。

Description

耐热乙丙绝缘橡皮
技术领域:
本发明涉及化学领域，尤其涉及制作电缆护套的橡胶材料，特别是一种耐热乙丙绝缘橡皮。
背景技术:
橡胶制品容易老化。橡胶分子结合了少量的氧后，会使橡胶制品的物理性能严重下降。同时，热量能极大地提高氧与橡胶分子之间的反应速率；温度每升高10℃，反应速率就会提高一倍。当温度从室温升到70℃时,该反应速率会有大约50倍的增幅。用于矿山的电缆护套采用橡胶材料制作，经常暴露在阳光和高温下，因此极易老化，造成绝缘破坏，引发安全事故。
发明内容：
本发明所要解决的技术问题是提供一种耐热乙丙绝缘橡皮，所述的这种耐热乙丙绝缘橡皮要解决现有技术中用于矿山的电缆护套极易老化、造成绝缘破坏的技术问题。
本发明的这种耐热乙丙绝缘橡皮，由乙丙橡胶、氧化锌、微晶石蜡、硬脂酸、汽缸油、二氧化硅、滑石粉、轻质碳酸钙、2-硫醇基苯并咪唑、过氧化二异丙苯、乙烯基三（β-甲氧基乙氧基）硅烷、三聚氰酸三烯丙脂、三盐基性硫酸铅、二盐基性亚磷酸铅组成，所述的乙丙橡胶在所述的橡皮中的质量百分比为45%，氧化锌在所述的橡皮中的质量百分比为3.5-5.5%，微晶石蜡在所述的橡皮中的质量百分比为1.2-2.0%，硬脂酸在所述的橡皮中的质量百分比为0.35-0.55%，汽缸油在所述的橡皮中的质量百分比为3.0-4.0%，二氧化硅在所述的橡皮中的质量百分比为3.5-5.5%，滑石粉在所述的橡皮中的质量百分比为18-25%，轻质碳酸钙在所述的橡皮中的质量百分比为5-12%，2-硫醇基苯并咪唑在所述的橡皮中的质量百分比为1.0-1.5%，过氧化二异丙苯在所述的橡皮中的质量百分比为1.2-1.8%，乙烯基三（β-甲氧基乙氧基）硅烷在所述的橡皮中的质量百分比为0.35-0.45%，三聚氰酸三烯丙脂在所述的橡皮中的质量百分比为0.5-0.8%，三盐基性硫酸铅在所述的橡皮中的质量百分比为0.5-2.5%，二盐基性亚磷酸铅在所述的橡皮中的质量百分比为1.8-3.8%。
本发明还提供了一种制备上述耐热乙丙绝缘橡皮的方法，包括如下步骤：
A：混料
1）                   加入乙丙橡胶于密炼机中，5-15分钟密炼；
2）                   将三聚氰酸三烯丙脂加入步骤（1）的粗料中，混合2-3分钟；
3）                   将二氧化硅、过氧化二异丙苯、乙烯基三（β-甲氧基乙氧基）硅烷、三盐基性硫酸铅、二盐基性亚磷酸铅、硬脂酸加入步骤（2）的粗料中，混合2-3分钟；
4）                   将轻质碳酸钙、微晶石蜡、汽缸油加入步骤（3）的粗料中，混合3-4分钟；
5）                   将滑石粉加入步骤（4）的粗料中，混合3-4分钟；
6）                   将上述混合后的粗料从密炼机中排入开炼机内，密炼机排胶温度控制在100-110℃；
7）                   在开炼机上对上述混合后的粗料拉薄通，拉薄通时的辊距为2-5mm；
8）                   待胶料温度低于95℃，加入氧化锌、2-硫醇基苯并咪唑于开炼机中，混合3-5分钟，混合时的辊距控制在5-10mm；
B、挤橡
   采用二台挤橡机对挤，挤橡机加料口温度控制在30-40℃，挤橡机一段温度控制在40-50℃，挤橡机二段温度控制在40-50℃，挤橡机三段温度控制在50-60℃，挤橡机机头温度控制在60-70℃；
C、硫化
将上述挤出料进缸硫化，硫化蒸汽压力为0.3-0.5Mpa，进气时间不超过12-15分钟，保温时间为40-60分钟，放气时间控制在40-80分钟。
本发明和已有技术相比较，其效果是积极和明显的。本发明采用经硅氧烷改性乙丙橡胶来提高耐热性，加入了抗氧剂使经聚硅氧烷改性的三元乙丙橡胶的耐高温性能进一步提高。实验证明，本发明可以长期工作的温度达到125℃，最低敷设温度为-40℃，解决了现有技术中用于矿山的电缆护套极易老化、造成绝缘破坏的技术问题。同时，可在受矿物油和燃料油污染的场合使用。本发明具有低烟无卤、成束阻燃的特性。
 具体实施方式：
实施例1:
本发明一种耐热乙丙绝缘橡皮，由乙丙橡胶、氧化锌、微晶石蜡、硬脂酸、汽缸油、二氧化硅、滑石粉、轻质碳酸钙、2-硫醇基苯并咪唑、过氧化二异丙苯、乙烯基三（β-甲氧基乙氧基）硅烷、三聚氰酸三烯丙脂、三盐基性硫酸铅、二盐基性亚磷酸铅组成，所述的乙丙橡胶在所述的橡皮中的质量百分比为45%，氧化锌在所述的橡皮中的质量百分比为3.5-5.5%，微晶石蜡在所述的橡皮中的质量百分比为1.2-2.0%，硬脂酸在所述的橡皮中的质量百分比为0.35-0.55%，汽缸油在所述的橡皮中的质量百分比为3.0-4.0%，二氧化硅在所述的橡皮中的质量百分比为3.5-5.5%，滑石粉在所述的橡皮中的质量百分比为18-25%，轻质碳酸钙在所述的橡皮中的质量百分比为5-12%，2-硫醇基苯并咪唑在所述的橡皮中的质量百分比为1.0-1.5%，过氧化二异丙苯在所述的橡皮中的质量百分比为1.2-1.8%，乙烯基三（β-甲氧基乙氧基）硅烷在所述的橡皮中的质量百分比为0.35-0.45%，三聚氰酸三烯丙脂在所述的橡皮中的质量百分比为0.5-0.8%，三盐基性硫酸铅在所述的橡皮中的质量百分比为0.5-2.5%，二盐基性亚磷酸铅在所述的橡皮中的质量百分比为1.8-3.8%。
本发明还提供了上述耐热乙丙绝缘橡皮的制备方法，其包括如下步骤：
A：混料
1）                   加入乙丙橡胶于密炼机中，5-15分钟密炼；
2）                   将三聚氰酸三烯丙脂加入步骤（1）的粗料中，混合2-3分钟；
3）                   将二氧化硅、过氧化二异丙苯、乙烯基三（β-甲氧基乙氧基）硅烷、三盐基性硫酸铅、二盐基性亚磷酸铅、硬脂酸加入步骤（2）的粗料中，混合2-3分钟；
4）                   将轻质碳酸钙、微晶石蜡、汽缸油加入步骤（3）的粗料中，混合3-4分钟；
5）                   将滑石粉加入步骤（4）的粗料中，混合3-4分钟；
6）                   将上述混合后的粗料从密炼机中排入开炼机内，密炼机排胶温度控制在100-110℃；
7）                   在开炼机上对上述混合后的粗料拉薄通，拉薄通时的辊距为2-5mm；
8）                   待胶料温度低于95℃，加入氧化锌、2-硫醇基苯并咪唑于开炼机中，混合3-5分钟，混合时的辊距控制在5-10mm；
B、挤橡
   采用二台挤橡机对挤，挤橡机加料口温度控制在30-40℃，挤橡机一段温度控制在40-50℃，挤橡机二段温度控制在40-50℃，挤橡机三段温度控制在50-60℃，挤橡机机头温度控制在60-70℃；
C、硫化
将上述挤出料进缸硫化，硫化蒸汽压力为0.3-0.5Mpa，进气时间不超过12-15分钟，保温时间为40-60分钟，放气时间控制在40-80分钟。

Claims (2)

1.一种耐热乙丙绝缘橡皮，其特征在于：由乙丙橡胶、氧化锌、微晶石蜡、硬脂酸、汽缸油、二氧化硅、滑石粉、轻质碳酸钙、2-硫醇基苯并咪唑、过氧化二异丙苯、乙烯基三硅烷、三聚氰酸三烯丙脂、三盐基性硫酸铅和二盐基性亚磷酸铅组成，所述的乙丙橡胶在所述的橡皮中的质量百分比为45%，所述的氧化锌在橡皮中的质量百分比为3.5-5.5%，所述的微晶石蜡在橡皮中的质量百分比为1.2-2.0%，所述的硬脂酸在橡皮中的质量百分比为0.35-0.55%，所述的汽缸油在橡皮中的质量百分比为3.0-4.0%，所述的二氧化硅在橡皮中的质量百分比为3.5-5.5%，所述的滑石粉在橡皮中的质量百分比为18-25%，所述的轻质碳酸钙在橡皮中的质量百分比为5-12%，所述的2-硫醇基苯并咪唑在橡皮中的质量百分比为1.0-1.5%，所述的过氧化二异丙苯在橡皮中的质量百分比为1.2-1.8%，所述的乙烯基三硅烷在橡皮中的质量百分比为0.35-0.45%，所述的三聚氰酸三烯丙脂在橡皮中的质量百分比为0.5-0.8%，所述的三盐基性硫酸铅在橡皮中的质量百分比为0.5-2.5%，所述的二盐基性亚磷酸铅在橡皮中的质量百分比为1.8-3.8%。
2.一种制备权利要求1所述的耐热乙丙绝缘橡皮的方法，其特征在于：包括如下步骤：
A：混料
1)加入乙丙橡胶于密炼机中，5-15分钟密炼；
2)将三聚氰酸三烯丙脂加入步骤（1）的粗料中，混合2-3分钟；
3)将二氧化硅、过氧化二异丙苯、乙烯基三硅烷、三盐基性硫酸铅、二盐基性亚磷酸铅、硬脂酸加入步骤（2）的粗料中，混合2-3分钟；
4)将轻质碳酸钙、微晶石蜡、汽缸油加入步骤（3）的粗料中，混合3-4分钟；
5)将滑石粉加入步骤（4）的粗料中，混合3-4分钟；
6)将上述混合后的粗料从密炼机中排入开炼机内，密炼机排胶温度控制在100-110℃；
7)在开炼机上对上述混合后的粗料拉薄通，拉薄通时的辊距为2-5mm；
8)待胶料温度低于95℃，加入氧化锌、2-硫醇基苯并咪唑于开炼机中，混合3-5分钟，混合时的辊距控制在5-10mm；
B、挤橡
   采用二台挤橡机对挤，挤橡机加料口温度控制在30-40℃，挤橡机一段温度控制在40-50℃，挤橡机二段温度控制在40-50℃，挤橡机三段温度控制在50-60℃，挤橡机机头温度控制在60-70℃；
C、硫化
将上述挤出料进缸硫化，硫化蒸汽压力为0.3-0.5Mpa，进气时间不超过12-15分钟，保温时间为40-60分钟，放气时间控制在40-80分钟。
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