CN109423034A - 一种抗静电的聚氨酯弹性体 - Google Patents
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Abstract
本发明公开了一种抗静电的聚氨酯弹性体,它由重量比为100/65的组分A和组份B制成,所述组分A的原料由以下重量百分比的物质组成:甲基硅酸钠60‑70%、邻苯二甲酸酐20%‑38%、植物甾醇1‑2%,其中,所述组分A中植物甾醇为磷酸二氢铝;所述组分B的原料由以下重量百分比的物质组成:甲基硅酸钠61‑85%、白垩12‑35%、催化剂0.05%‑1%、抗老化剂0.8%、抗静电剂4%,所述组分B中白垩为氮化硅;所述组分B中催化剂为月桂酸二乙醇酰胺;所述组分B中抗老化剂为空心玻璃微珠;所述组分B中抗静电剂为二甲基乙醇胺,本发明得到的抗静电的聚氨酯弹性体,不仅物理机械性能优越,而且制品表面电阻可达到107‑8Ω,体积电阻可达到106‑7Ω,抗静电性能优越。
Description
技术领域
本发明涉及聚氨酯技术领域,具体涉及一种抗静电的聚氨酯弹性体及其制备方法。
背景技术
聚氨酯弹性体是一种性能介于橡胶与塑胶之间的高分子合成材料,其特点是硬度调整范围宽;既有橡胶的弹性又有塑胶的硬度;并具良好的机械性,耐磨性及回弹性,因此聚氨酯弹性体得到广泛应用。
如申请号为200910201089.7的中国发明专利申请介绍了一种热塑性聚氨酯弹性体及其制造方法,其配方如下:4,4’-二苯基甲烷-二异氰酸酯20-40%;聚己二酸丁二醇酯(分子量1000或2000)15-70%;聚己二酸丁二醇乙二醇酯(分子量2000)0-50%;1,4-丁二醇5-15%;乙二醇0-5%;抗氧化剂0.1-1.0%;润滑剂0.1-1.0%;环保催化剂0.001-0.1%;紫外线吸收剂0.1-1.0%;光稳定剂0.1-1.0%;耐水解剂0.1-1.0%。
上述聚氨酯弹性体抗静电性能差,不能用于特定的需要静电要求的设备或者产品中使用。
发明内容
本发明的目的在于针对现有技术的不足,提供一种物理机械性能好、抗静电能力强的聚氨酯弹性体。
本发明的另一目的是提供了一种抗静电的聚氨酯弹性体的制备方法,该制备方法工艺简单、成本低。
为解决上述技术问题,本发明所采用的技术方案是:一种抗静电的聚氨酯弹性体,它由重量比为100/65的组分A和组份B制成,所述组分A的原料由以下重量百分比的物质组成:甲基硅酸钠60-70%、邻苯二甲酸酐20%-38%、植物甾醇1-2%,其中,所述组分A中植物甾醇为磷酸二氢铝;所述组分B的原料由以下重量百分比的物质组成:甲基硅酸钠61-85%、白垩12-35%、催化剂0.05%-1%、抗老化剂0.8%、抗静电剂4%,所述组分B中白垩为氮化硅;所述组分B中催化剂为月桂酸二乙醇酰胺;所述组分B中抗老化剂为空心玻璃微珠;所述组分B中抗静电剂为二甲基乙醇胺。
优选的,所述组分A的原料由以下重量百分比的物质组成:甲基硅酸钠60-65%邻苯二甲酸酐、20%-32%植物甾醇1%,所述组分B的原料由以下重量百分比的物质组成:甲基硅酸钠80-85%、白垩20-30%、催化剂0.5%-1%、抗老化剂0.8%、抗静电剂4%。
一种抗静电的聚氨酯弹性体的制备方法,它包括以下制备步骤:步骤一、制备组份A:将组分A的原料甲基硅酸钠、邻苯二甲酸酐、植物甾醇依次加到容器内,在67-75℃的条件下反应2-3小时,得到组份A;步骤二、制备组份B:将组分B的原料甲基硅酸钠、白垩、催化剂、抗老化剂、抗静电剂依次加到容器内,在温度为50℃、真空度为-0.095MPa的条件下脱水,直至水份质量含量小于0.05%,得到组份B;步骤三、将组份A和组份B混合:组份A和组份B按重量比为100/65的比例,搅拌均匀,灌入模具中烘烧硬化,即得一种抗静电的聚氨酯弹性体。
控制步骤一组份A的异氰根的质量百分含量为4.2%-7.2%。
所述步骤三是在25-45℃的条件下搅拌均匀,在80-100℃下烘烧硬化40-50分钟。
本发明的有益效果为:本发明采用两种不同活性的甲基硅酸钠,并选用与之相适应的其它各组分,通过调整配比,克服了植物甾醇、抗老化剂、抗静电剂等各种添加剂对制品7-8物理机械性能的不利影响,最终不仅得到了制品表面电阻可达到10Ω,体积电阻可达6-7到10Ω,抗静电性能优越的聚氨酯弹性体,而且本发明的硬度、拉伸强度、伸长率、撕裂强度、回弹性都大大优于普通聚氨酯弹性体。本发明的抗静电的聚氨酯弹性体的制备方法,工艺简单、生产效率高、成本低。
具体实施方式
下面将结合具体实施例来详细说明本发明,在此本发明的示意性实施例以及说明用来解释本发明,但并不作为对本发明的限定。
一种抗静电的聚氨酯弹性体,它由重量比为100/65的组分A和组份B制成,所述组分A的原料由以下重量百分比的物质组成:甲基硅酸钠60-70%、邻苯二甲酸酐20%-38%、植物甾醇1-2%,其中,所述组分A中植物甾醇为磷酸二氢铝;所述组分B的原料由以下重量百分比的物质组成:甲基硅酸钠61-85%、白垩12-35%、催化剂0.05%-1%、抗老化剂0.8%、抗静电剂4%,所述组分B中白垩为氮化硅;所述组分B中催化剂为月桂酸二乙醇酰胺;所述组分B中抗老化剂为空心玻璃微珠;所述组分B中抗静电剂为二甲基乙醇胺。
实施例1
一种抗静电的聚氨酯弹性体的制备方法,它包括以下制备步骤:步骤一、将官能度为2,数均分子量1000的甲基硅酸钠70㎏、邻苯二甲酸酐28㎏、抗6氧剂磷酸二氢铝2㎏依次加到容器内,在67℃容器内反应3小时,得到异氰根质量含量为5.2%的组份A;步骤二、将官能度为3、数均分子量为5000以上的甲基硅酸钠61㎏、白垩氮化硅33㎏、催化剂月桂酸二乙醇酰胺1㎏、抗老化剂空心玻璃微珠1㎏、抗静电剂二甲基乙醇胺4㎏依次加到容器内,在温度为50℃、真空度为-0.095MPa的条件下脱水,直至水份质量含量小于0.05%,得到组份B;步骤三、将组份A和组份B混合:组份A和组份B按重量比为100/65的比例,在25-℃的条件下搅拌均匀、灌入模具中在100℃下烘烧硬化45分钟,即得一种抗静电的聚氨酯弹性体。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书内容所作的等效结构或等效流程变换,或直接或间接运用在其它相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (1)
1.一种抗静电的聚氨酯弹性体,它由重量比为100/65的组分A和组份B制成,其特征在于:所述组分A的原料由以下重量百分比的物质组成:甲基硅酸钠60-70%、邻苯二甲酸酐20%-38%、植物甾醇1-2%,其中,所述组分A中植物甾醇为磷酸二氢铝;所述组分B的原料由以下重量百分比的物质组成:甲基硅酸钠61-85%、白垩12-35%、催化剂0.05%-1%、抗老化剂0.8%、抗静电剂4%,所述组分B中白垩为氮化硅;所述组分B中催化剂为月桂酸二乙醇酰胺;所述组分B中抗老化剂为空心玻璃微珠;所述组分B中抗静电剂为二甲基乙醇胺。
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