CN107759885A - 一种耐热变形的聚乙烯发泡塑料及其制备方法 - Google Patents
一种耐热变形的聚乙烯发泡塑料及其制备方法 Download PDFInfo
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Abstract
本发明提供一种耐热变形的聚乙烯发泡塑料及其制备方法,该聚乙烯发泡塑料由以下原料通过模压发泡制得:双酚A型环氧树脂4、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾、偶氮二甲酰胺、低密度聚乙烯。
Description
本申请为分案申请,原案专利号为:201610290775.6,申请日为2016年4月29日,发明名称为:一种耐热变形的聚乙烯发泡塑料及其制备方法。
技术领域
本发明涉及聚乙烯发泡塑料,尤其涉及一种耐热变形的聚乙烯发泡塑料及其制备方法。
背景技术
聚乙烯发泡塑料作为一种保温材料,具有很多的优点:质轻、密度小,容重约为20~40kg/m3;导热系数小,一般在0.017~0.027(w/m·k)之间;吸水率低,具有较强的防水性。由于聚乙烯发泡塑料具有以上优点,因此比较适用于空调***的保温,特别是洁净度要求高的空调***,不允许用玻璃棉等易产生纤维屑的材料作风管***的保温材料,那么价格适中的聚乙烯发泡塑料便是很好的代用品。
但是聚乙烯发泡塑料不宜在高温下使用,当温度超过70℃后,聚乙烯发泡塑料管套会出现融缩变形,从而发生与管道空离的现象,也即聚乙烯发泡塑料管套与管道分离,这样会影响聚乙烯发泡塑料的保温效果。
发明内容
本发明的主要目的在于提供一种耐热变形的聚乙烯发泡塑料及其制备方法,从而可以解决现有技术中聚乙烯发泡塑料在高温下使用时与管道分离的现象。
为达到以上目的,本发明提供一种耐热变形的聚乙烯发泡塑料,由以下重量百分比含量的原料制得:双酚A型环氧树脂4~5%、聚乙烯缩丁醛0.5~1.0%、二乙烯三胺0.6~0.9%、环氧改性有机硅树脂3~4%、乙酸钾0.2~0.5%、偶氮二甲酰胺6~8%,余量为低密度聚乙烯。
所述聚乙烯发泡塑料通过以下步骤制备:
(1)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯按照上述比例加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(2)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(3)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
本发明提供的聚乙烯发泡塑料容重约为23~28kg/m3,导热系数为0.020~0.024(w/m·k),能够在100℃环境下24小时不会出现融缩变形,从而解决了背景技术中提到的聚乙烯管套与管道空离的现象,而且改性后的聚乙烯发泡塑料无污染,力学性能也达到了保温材料的使用要求。
聚乙烯发泡塑料中加入的双酚A型环氧树脂固化后具有良好的物理、化学性能,制品尺寸稳定性好、硬度高,同时也有利于提高聚乙烯发泡塑料的耐热性;加入聚乙烯缩丁醛可以对双酚A型环氧树脂进行改性,提高双酚A型环氧树脂的抗冲击柔性,同时还可以提高双酚A型环氧树脂与低密度聚乙烯的相容性;二乙烯三胺为双酚A型环氧树脂和环氧改性有机硅树脂的固化剂,使用二乙烯三胺作为固化剂,可以使双酚A型环氧树脂在140℃以上不变形;加入环氧改性有机硅树脂有利于提高聚乙烯发泡塑料的耐热性,同时环氧改性有机硅树脂与双酚A型环氧树脂很好的相容;加入乙酸钾可以降低环氧改性有机硅树脂的固化温度。
具体实施方式
以下描述用于揭露本发明以使本领域技术人员能够实现本发明。以下描述中的优选实施例只作为举例,本领域技术人员可以想到其他显而易见的变型。
实施例1:
提供一种聚乙烯发泡塑料,通过以下步骤制备:
(1)按照质量百分比称取各原料:双酚A型环氧树脂4%、聚乙烯缩丁醛0.8%、二乙烯三胺0.9%、环氧改性有机硅树脂3%、乙酸钾0.5%、偶氮二甲酰胺6%、余量为低密度聚乙烯;
(2)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(3)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(4)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
实施例2:
提供一种聚乙烯发泡塑料,通过以下步骤制备:
(1)按照质量百分比称取各原料:双酚A型环氧树脂4.8%、聚乙烯缩丁醛0.6%、二乙烯三胺0.7%、环氧改性有机硅树脂3.2%、乙酸钾0.2%、偶氮二甲酰胺7%、余量为低密度聚乙烯;
(2)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(3)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(4)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
实施例3:
提供一种聚乙烯发泡塑料,通过以下步骤制备:
(1)按照质量百分比称取各原料:双酚A型环氧树脂5%、聚乙烯缩丁醛1.0%、二乙烯三胺0.6%、环氧改性有机硅树脂4%、乙酸钾0.4%、偶氮二甲酰胺8%、余量为低密度聚乙烯;
(2)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(3)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(4)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
实施例4
提供一种聚乙烯发泡塑料,通过以下步骤制备:
(1)按照质量百分比称取各原料:双酚A型环氧树脂4.5%、聚乙烯缩丁醛0.5%、二乙烯三胺0.8%、环氧改性有机硅树脂3.5%、乙酸钾0.3%、偶氮二甲酰胺7%、余量为低密度聚乙烯;
(2)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(3)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(4)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
对比例1:
提供一种聚乙烯发泡塑料,通过以下步骤制备:
(1)按照质量百分比称取各原料:双酚A型环氧树脂4.5%、聚乙烯缩丁醛0.5%、二乙烯三胺0.4%、乙酸钾0.3%、偶氮二甲酰胺7%、余量为低密度聚乙烯;
(2)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(3)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(4)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
对比例2:
提供一种聚乙烯发泡塑料,通过以下步骤制备:
(1)按照质量百分比称取各原料:聚乙烯缩丁醛0.5%、二乙烯三胺0.4%、环氧改性有机硅树脂3.5%、乙酸钾0.3%、偶氮二甲酰胺7%、余量为低密度聚乙烯;
(2)将聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(3)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(4)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
表2为以上各实施例和对比例的聚乙烯发泡塑料的导热系数与耐热性的测试结果。
表2
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的范围内。本发明要求的保护范围由所附的权利要求书及其等同物界定。
Claims (2)
1.一种耐热变形的聚乙烯发泡塑料,其特征在于,由以下原料通过模压发泡制得:双酚A型环氧树脂4、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾、偶氮二甲酰胺、低密度聚乙烯;
以上各原料的质量百分比为:双酚A型环氧树脂4~5%、聚乙烯缩丁醛0.5~1.0%、二乙烯三胺0.6~0.9%、环氧改性有机硅树脂3~4%、乙酸钾0.2~0.5%、偶氮二甲酰胺6~8%,余量为低密度聚乙烯。
2.根据权利要求1所述的聚乙烯发泡塑料,其特征在于,通过以下步骤制备所述聚乙烯发泡塑料:
(1)将双酚A型环氧树脂、聚乙烯缩丁醛、二乙烯三胺、环氧改性有机硅树脂、乙酸钾和低密度聚乙烯加入密闭式炼胶机中,于140~150℃混炼均匀,然后再加入偶氮二甲酰胺,于155~160℃混炼均匀后出料,得到混炼料;
(2)将所述混炼料装入模具,再送入平板硫化机进行交联发泡,温度为160~175℃,压力为10~12MPa,保压时间为15~20min;
(3)保压完成后,压力骤降,完成发泡,得到所述聚乙烯发泡塑料。
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CN114479259A (zh) * | 2022-03-31 | 2022-05-13 | 淄博市临淄六顺新材料有限公司 | 发泡聚烯烃复合材料及其制备方法 |
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CN114479259A (zh) * | 2022-03-31 | 2022-05-13 | 淄博市临淄六顺新材料有限公司 | 发泡聚烯烃复合材料及其制备方法 |
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