CN106566093A - 一种汽车密封条用密实胶微发泡材料 - Google Patents

一种汽车密封条用密实胶微发泡材料 Download PDF

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CN106566093A
CN106566093A CN201610978699.8A CN201610978699A CN106566093A CN 106566093 A CN106566093 A CN 106566093A CN 201610978699 A CN201610978699 A CN 201610978699A CN 106566093 A CN106566093 A CN 106566093A
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王胜杰
邱德健
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Abstract

一种汽车密封条用密实胶微发泡材料，由以下重量份数原料制成：三元乙丙橡胶：20‑35份，N774炭黑：12‑30份，N550炭黑：18‑30份，环烷油：20‑30份，纳米碳酸钙：8‑12份，煅烧陶土：3‑6份，活性剂：1.8‑2.2份，硬脂酸：0.2‑0.3份，硫化剂2.5‑4.0份，发泡剂：0.8‑2份。本发明提供的密实胶微发泡材料，能满足汽车用门窗车门密封条的应用，材料成本低，微发泡配方技术工艺在汽车减轻重量方面的优势是显而易见，比重0.78‑0.85，比普通密实胶材料低，材料的应用可以减重汽车用的密封条30％‑50％，对汽车减重有积极的意义。

Description

一种汽车密封条用密实胶微发泡材料
技术领域：
本发明属于材料技术领域，具体涉及一种汽车密封条用密实胶微发泡材料。
背景技术：
汽车的密封条是靠密封条的压缩变形来填充构件间的缝隙，密封条安装在钣金止口上，密封条受开闭件钣金或其他零件挤压变形，起到密闭的作用，使车门的内部与外界隔绝，不仅能防风、雨水和尘土等侵入车内，还能提高隔音和隔热性能，保持车内环境，同时还能缓和车门关闭时冲击力和车身在行驶过程中的振动。由于汽车行业高速发展，汽车对排放也要求越来越高，节能减排成为当下主题，对于汽车组件要求高效轻便.目前常见的汽车用的普通密实密封胶条密度1.2-1.4g/cm3，密度大、减震缓冲能力也有限。
密实胶微发泡材料技术，采用闭孔发泡，孔径纳米级别，密度小、质量轻，吸收冲击载荷性好，表现出优异的减震缓冲能力，隔热性强，隔音效果好，耐酸碱、化学稳定性好
发明内容
针对现有汽车密封条胶存在的缺陷，本发明提供了一种汽车密封条用密实胶微发泡材料。
本发明采取的技术方案是：一种汽车密封条用密实胶微发泡材料，由以下重量份数原料制成：三元乙丙橡胶：20-35份，N774炭黑：12-30份，N550炭黑：18-30份，环烷油：20-30份，纳米碳酸钙：8-12份，煅烧陶土：3-6份，活性剂：1.8-2.2份，硬脂酸：0.2-0.3份，硫化剂2.5-4.0份，发泡剂：0.8-2份。
优选的，所述的活性剂为氧化锌。
优选的，所述的硫化剂为硫黄和硫化促进剂BZ、DTPP、TT、DM的混合物，各物质的混合重量比：1.5∶0.8-1.2∶0.8∶0.4∶0.8-1.2。
优选的，所述的发泡剂为OBSH与发泡剂AC3000混合制备，二者重量比为：1∶0.5-1.2
本发明还提供了一种汽车密封条用密实胶微发泡材料的制备方法，具体步骤为：
(1)一段混炼：将20-35份三元乙丙橡胶、1.8-2.2份活性剂和0.2-0.3份硬脂酸投入密炼机中塑炼100-120秒，投入12-30份N774炭黑和入18-30份N550炭黑混炼240-260秒，再投入20-30份环烷油、8-12份纳米碳酸钙和3-6份煅烧陶土混炼320-340秒，下料；其中密炼机工作参数为：进胶温度小于45度、下料温度125-150℃、上顶栓压力为0.6-0.8MPa、冷却水压大于0.1MPa、水温20-26℃、转速30转/分钟、容量70-73KG；
(2)出片：密炼机出料在22寸开炼机翻料2-3分钟出片，在风机冷却至室温后收料，室温度调节4小时；胶料存储条件为温度23±3℃、湿度50±5％，使用期限4小时至30天；
(3)二段混炼：投50％一段母胶与2.5-4.0份硫化剂和0.8-2份发泡剂进密炼机混炼20-30秒，投剩余50％一段母胶继续混炼30秒，80-85℃下料；密炼机工作参数为：压力0.5-0.6MPa，转速30转/分钟，容量63-64KG，进胶温度小于40℃，冷却水压大于0.1MPa，水温14-18℃；
(4)收料：二段混炼胶出料后在22寸开炼机翻料2-3分钟，在风机冷却至室温收料得EPDM与SBR共辊改性密封材料；胶料存储条件为温度在23±3℃、湿度50±5％，使用期限8小时至7天。
本发明的有益效果是：本发明提供的密实胶微发泡材料，能满足汽车用门窗车门密封条的应用，材料成本低，微发泡配方技术工艺在汽车减轻重量方面的优势是显而易见，比重0.78-0.85，比普通密实胶材料低，材料的应用可以减重汽车用的密封条30％-50％，对汽车减重有积极的意义。
具体实施方式
实施例1
一种汽车密封条用密实胶微发泡材料，由以下重量份数原料制成：
所述的硫化剂为硫黄和硫化促进剂BZ、DTPP、TT、DM的混合物，各物质的混合重量比：1.5∶1.2∶0.8∶0.4∶0.8；
所述的发泡剂为OBSH与发泡剂AC3000混合物，二者重量比为1∶0.5。
采用该配方的密实胶微发泡材料的制备方法具体步骤为：
(1)一段混炼：将20份三元乙丙橡胶、1.8份氧化锌和0.2份硬脂酸投入密炼机中塑炼100-120秒，投入12份N774炭黑和入18份N550炭黑混炼240-260秒，再投入20份环烷油、8份纳米碳酸钙和3份煅烧陶土混炼320-340秒，下料；其中密炼机工作参数为：进胶温度小于45度、下料温度125-150℃、上顶栓压力为0.6-0.8MPa、冷却水压大于0.1MPa、水温20-26℃、转速30转/分钟、容量70-73KG；
(2)出片：密炼机出料在22寸开炼机翻料2-3分钟出片，在风机冷却至室温后收料，室温度调节4小时；胶料存储条件为温度23±3℃、湿度50±5％，使用期限4小时至30天；
(3)二段混炼：投50％一段母胶与2.5份硫化剂和0.8份发泡剂进密炼机混炼20-30秒，投剩余50％一段母胶继续混炼30秒，80-85℃下料；密炼机工作参数为：压力0.5-0.6MPa，转速30转/分钟，容量63-64KG，进胶温度小于40℃，冷却水压大于0.1MPa，水温14-18℃；
(4)收料：二段混炼胶出料后在22寸开炼机翻料2-3分钟，在风机冷却至室温收料得EPDM与SBR共辊改性密封材料；胶料存储条件为温度在23±3℃、湿度50±5％，使用期限8小时至7天。
所得密实胶微发泡材料的性能参见表1
表1性能测试数据：
实施例2
一种汽车密封条用密实胶微发泡材料，由以下重量份数原料制成：
三元乙丙橡胶：35份
N774炭黑：30份
N550炭黑：30份
环烷油：30份
纳米碳酸钙：12份
煅烧陶土：6份
氧化锌：2.2份
硬脂酸：0.3份
硫化剂4.0份
发泡剂：2份。
所述的硫化剂为硫黄和硫化促进剂BZ、DTPP、TT、DM的混合物，各物质的混合重量比：1.5∶1.2∶0.8∶0.4∶0.8；
所述的发泡剂为OBSH与发泡剂AC3000混合物，二者重量比为1∶1.2。
按实施例1混炼工艺炼胶，所得密实胶微发泡材料的性能参见表2。
表2性能测试数据：
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。

Claims (5)

1.一种汽车密封条用密实胶微发泡材料，由以下重量份数原料制成：三元乙丙橡胶：20-35份，N774炭黑：12-30份，N550炭黑：18-30份，环烷油：20-30份，纳米碳酸钙：8-12份，煅烧陶土：3-6份，活性剂：1.8-2.2份，硬脂酸：0.2-0.3份，硫化剂2.5-4.0份，发泡剂：0.8-2份。
2.根据权利要求1所述的材料，其特征在于，优选的，所述的活性剂为氧化锌。
3.根据权利要求1所述的材料，其特征在于，所述的硫化剂为硫黄和硫化促进剂BZ、DTPP、TT、DM的混合物，各物质的混合重量比为1.5∶0.8-1.2∶0.8∶0.4∶0.8-1.2。
4.根据权利要求1所述的材料，其特征在于，所述的发泡剂为OBSH与发泡剂AC3000混合制备，二者重量比为：1∶0.5-1.2。
5.一种如权利要求1-4任一项所述的密实胶微发泡材料的制备方法，具体步骤为：
(1)一段混炼：将20-35份三元乙丙橡胶、1.8-2.2份活性剂和0.2-0.3份硬脂酸投入密炼机中塑炼100-120秒，投入12-30份N774炭黑和入18-30份N550炭黑混炼240-260秒，再投入20-30份环烷油、8-12份纳米碳酸钙和3-6份煅烧陶土混炼320-340秒，下料；其中密炼机工作参数为：进胶温度小于45度、下料温度125-150℃、上顶栓压力为0.6-0.8MPa、冷却水压大于0.1MPa、水温20-26℃、转速30转/分钟、容量70-73KG；
(2)出片：密炼机出料在22寸开炼机翻料2-3分钟出片，在风机冷却至室温后收料，室温度调节4小时；胶料存储条件为温度23±3℃、湿度50±5％，使用期限4小时至30天；
(3)二段混炼：投50％一段母胶与2.5-4.0份硫化剂和0.8-2份发泡剂进密炼机混炼20-30秒，投剩余50％一段母胶继续混炼30秒，80-85℃下料；密炼机工作参数为：压力0.5-0.6MPa，转速30转/分钟，容量63-64KG，进胶温度小于40℃，冷却水压大于0.1MPa，水温14-18℃；
(4)收料：二段混炼胶出料后在22寸开炼机翻料2-3分钟，在风机冷却至室温收料得EPDM与SBR共辊改性密封材料；胶料存储条件为温度在23±3℃、湿度50±5％，使用期限8小时至7天。
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