CN109294216A - 一种聚氨酯自结皮发动机罩盖及其制备方法 - Google Patents
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Abstract
本发明公开了一种聚氨酯自结皮发动机罩盖,涉及汽车零配件制备技术领域。一种聚氨酯自结皮发动机罩盖包括:包括A组份材料65‑75%和B组份材料25‑35%;制备方法包括:步骤1、将A组份材料加入搅拌设备中搅拌混合均匀;步骤2、使用酒精清洗模具,清洗后在模具内喷施脱模剂和喷模内漆;步骤3、将成型材料和B组份材料通过高压机发泡机将原料混合均匀,通过机器人手臂将混合后的原料注入模具中发泡成型;步骤4、对成型冷却后的产品进行外观检测。本发明通过以异氰酸酯和组合聚醚为主体材料,并添加颜料和助剂经混合、发泡成型制得的发动机罩盖,其具有优良的耐高温型、良好的隔音效果以及较强的结构强度。
Description
技术领域
本发明属于汽车零配件制备技术领域,特别是涉及一种聚氨酯自结皮发动机罩盖以及一种聚氨酯自结皮发动机罩盖制备方法。
背景技术
发动机罩盖是一种覆盖在车辆的发动机上的汽车配件,其与发动机接触的面需要具有较好吸音性,从而防止发动机产生的噪音扩散到驾驶舱;其未与发动机接触的面需要具有良好的外观,以便满足使用者的外观感受。
然而,现有的发动机罩盖一般采用塑料材质制成,在实际应用过程中存在以下问题:(1)由于发动机工作时发动机舱内产生高温,发动机罩盖盖在其上,在如此高温条件下,塑料材质易发生变形,从而影响发动机罩盖对发动机的保护效果;(2)塑料材料的吸音功能差,不能对发动机产生的噪音进行有效的隔离,对周围环境造成噪音污染;(3)由于现有的塑料材质的耐热隔音效果差,因此需要在设计发动机罩盖时增加额外的隔热隔音结构和刚性结构来满足发动机罩盖的要求,而这样则不能满足汽车轻量化的要求,浪费能源。
发明内容
本发明的目的在于提供一种聚氨酯自结皮发动机罩盖,通过以异氰酸酯和组合聚醚为主体材料,并添加颜料和助剂经混合、发泡成型制得的发动机罩盖,其具有优良的耐高温型、良好的隔音效果以及较强的结构强度。
为解决上述技术问题,本发明是通过以下技术方案实现的:
本发明为一种聚氨酯自结皮发动机罩盖,以重量百分比计包括A组份材料65-80%和B组份材料20-35%:
其中,所述A组份材料以重量百分比计包括:组合聚醚75-90%、颜料1-10%、助剂5-15%;
其中,所述B组份材料选用异氰酸酯。
进一步地,所述组合聚醚以重量百分比计包括10-45%的具有伯羟基的低不饱和度羟值为33-37mgKOH/g的聚氧化丙烯二醇PPG、10-30%的以丙三醇为起始剂的羟值为450-550mgKOH/g的环氧丙烷环氧乙烷共聚醚、10-30%的烷氧基化多元醇和10-30%的CAPA三元醇。
进一步地,所述异氰酸酯选自二苯基甲烷二异氰酸酯和多苯基多亚甲基多异氰酸酯以及它们的多聚体、预聚物或其组合。
进一步地,所述颜料选用黑色颜料C.I.PB7、白色颜料C.I.PW6、红色颜料C.I.PR146、黄色颜料C.I.PY151和蓝色颜料C.I.PB153中的一种或多种。
进一步地,所述助剂包括有发泡剂、硅油、氧化铝粉、胺类催化剂、聚醚改性硅氧烷匀泡剂。
进一步地,所述异氰酸酯中包含增强材料,所述增强材料使得包含其的异氰酸酯在25℃下的粘度高于300mPa.s。
一种聚氨酯自结皮发动机罩盖的制备方法,包括如下步骤:
步骤1、成型材料制备:将A组份材料加入搅拌设备中搅拌混合均匀;
步骤2、模具清洁:使用干冰清洗模具,清洗后在模具内喷施脱模剂,同时在模具内型腔内喷模内漆;
步骤3、发泡成型:将步骤1制得的成型材料以及B组分材料通过高压机发泡机将原料混合均匀,通过机器人手臂将混合后的原料注入模具中发泡成型;
步骤4、成品检测:对成型冷却后的产品进行外观检测,所述外观检测包括有修边检测,表面检测。
进一步地,所述步骤1成型材料制备过程中最高温度不高于45℃。
进一步地,所述脱模剂选用蜡或硅油。
本发明具有以下有益效果:
本发明通过以异氰酸酯和组合聚醚为主体材料,并添加颜料和助剂经混合、发泡成型制得的发动机罩盖,其具有优良的耐高温型、良好的隔音效果以及较强的结构强度;本发明的制备工艺简单、能够满足汽车工业的轻量化要求,节能环保,且还具有较强的吸音功能。
当然,实施本发明的任一产品并不一定需要同时达到以上所述的所有优点。
具体实施方式
实施例1
一种聚氨酯自结皮发动机罩盖,以重量百分比计包括A组份材料70%和B组份材料30%:
其中,A组份材料以重量百分比计包括:组合聚醚80%、颜料4%、助剂14%;
其中,B组份材料选用异氰酸酯。
优选地,组合聚醚以重量百分比计包括30%的具有伯羟基的低不饱和度羟值为33-37mgKOH/g的聚氧化丙烯二醇PPG、20%的以丙三醇为起始剂的羟值为450-550mgKOH/g的环氧丙烷环氧乙烷共聚醚、25%的烷氧基化多元醇和25%的CAPA三元醇。
优选地,异氰酸酯选用二苯基甲烷二异氰酸酯。
优选地,颜料选用黑色颜料C.I.PB7。
优选地,助剂包括有发泡剂、硅油、胺类催化剂、聚醚改性硅氧烷匀泡剂。
优选地,异氰酸酯中包含增强材料玻璃纤维,增强材料使得包含其的异氰酸酯在25℃下的粘度高于300mPa.s。
一种聚氨酯自结皮发动机罩盖的制备方法,包括如下步骤:
步骤1、成型材料制备:将A组份材料加入搅拌设备中搅拌混合均匀;
步骤2、模具清洁:使用干冰清洗模具,清洗后在模具内喷施脱模剂,同时在模具内型腔内喷模内漆;
步骤3、发泡成型:将步骤1制得的成型材料以及B组分材料通过高压机发泡机将原料混合均匀,通过机器人手臂将混合后的原料注入模具中发泡成型;
步骤4、成品检测:对成型冷却后的产品进行外观检测,外观检测包括有修边检测,表面检测。
优选地,步骤1成型材料制备过程中最高温度不高于45℃。
优选地,脱模剂选用硅油。
实施例2
一种聚氨酯自结皮发动机罩盖,以重量百分比计包括A组份材料80%和B组份材料20%:
其中,A组份材料以重量百分比计包括:组合聚醚90%、颜料3%、助剂7%;
其中,B组份材料选用异氰酸酯。
优选地,组合聚醚以重量百分比计包括40%的具有伯羟基的低不饱和度羟值为33-37mgKOH/g的聚氧化丙烯二醇PPG、10%的以丙三醇为起始剂的羟值为450-550mgKOH/g的环氧丙烷环氧乙烷共聚醚、25%的烷氧基化多元醇和25%的CAPA三元醇。
优选地,颜料选用红色颜料C.I.PR146、黄色颜料C.I.PY151二者的组合物,红色颜料C.I.PR146和黄色颜料C.I.PY151的重量比为2:7。
优选地,助剂包括有发泡剂、硅油、胺类催化剂、聚醚改性硅氧烷匀泡剂。
优选地,异氰酸酯为六亚甲基二异氰酸酯(HDI)和二苯基甲烷二异氰酸酯,六亚甲基二异氰酸酯(HDI)和二苯基甲烷二异氰酸酯质量比为1:1;异氰酸酯中包含增强材料玻璃纤维,增强材料使得包含其的异氰酸酯在25℃下的粘度高于300mPa.s。
一种聚氨酯自结皮发动机罩盖的制备方法,同实施例1。
实施例3
一种聚氨酯自结皮发动机罩盖,以重量百分比计包括A组份材料65%和B组份材料35%:
其中,A组份材料以重量百分比计包括:组合聚醚85%、颜料3%、助剂12%;
其中,B组份材料选用异氰酸酯。
优选地,组合聚醚以重量百分比计包括15%的具有伯羟基的低不饱和度羟值为33-37mgKOH/g的聚氧化丙烯二醇PPG、25%的以丙三醇为起始剂的羟值为450-550mgKOH/g的环氧丙烷环氧乙烷共聚醚、30%的烷氧基化多元醇和30%的CAPA三元醇。
优选地,颜料选用蓝色颜料C.I.PB153。
优选地,助剂包括有发泡剂、硅油、胺类催化剂、聚醚改性硅氧烷匀泡剂。
优选地,异氰酸酯为六亚甲基二异氰酸酯(HDI);
优选地,异氰酸酯中包含增强材料聚酯纤维,增强材料聚酯纤维使得包含其的异氰酸酯在25℃下的粘度高于300mPa.s。
一种聚氨酯自结皮发动机罩盖的制备方法,同实施例1。
实施例4
取样测试实施例1-3,进行性能测试
耐低温实验:将样品放入-40℃的恒温箱中静置24h,取出后在标准环境(30℃、50%RH)静置1h,检查样品外观、形状、颜色及表面特征;
耐高温实验:将样品放入150℃的恒温箱中静置24h,取出后在标准环境(30℃、50%RH)静置1h,检查样品外观、形状、颜色及表面特征;
物性测试:取标准样:长度24.7-25.3cm;宽度5.9-6.1cm;
测量老花前和老化后的拉伸强度和断裂伸长率;
并测量老花前的撕裂强度;
老化条件:150℃*168h;
测试结果如下表一所示;
在本说明书的描述中,参考术语“一个实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节,也不限制该发明仅为所述的具体实施方式。显然,根据本说明书的内容,可作很多的修改和变化。本说明书选取并具体描述这些实施例,是为了更好地解释本发明的原理和实际应用,从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。
Claims (9)
1.一种聚氨酯自结皮发动机罩盖,其特征在于,以重量百分比计包括A组份材料65-75%和B组份材料25-35%:
其中,所述A组份材料以重量百分比计包括:组合聚醚75-90%、颜料1-10%、助剂5-15%;
其中,所述B组份材料选用异氰酸酯。
2.根据权利要求1所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述组合聚醚以重量百分比计包括10-45%的具有伯羟基的低不饱和度羟值为33-37mgKOH/g的聚氧化丙烯二醇PPG、10-30%的以丙三醇为起始剂的羟值为450-550mgKOH/g的环氧丙烷环氧乙烷共聚醚、10-30%的烷氧基化多元醇和10-30%的CAPA三元醇。
3.根据权利要求1所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述异氰酸酯选自二苯基甲烷二异氰酸酯和多苯基多亚甲基多异氰酸酯以及它们的多聚体、预聚物或其组合。
4.根据权利要求1所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述颜料选用黑色颜料C.I.PB7、白色颜料C.I.PW6、红色颜料C.I.PR146、黄色颜料C.I.PY151和蓝色颜料C.I.PB153中的一种或多种。
5.根据权利要求1所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述助剂包括有发泡剂、硅油、氧化铝粉、胺类催化剂、聚醚改性硅氧烷匀泡剂。
6.根据权利要求1所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述异氰酸酯中包含增强材料,所述增强材料使得包含其的异氰酸酯在25℃下的粘度高于300mPa.s。
7.如权利要求1-6任意一所述的一种聚氨酯自结皮发动机罩盖的制备方法,其特征在于,包括如下步骤:
步骤1、成型材料制备:将A组份材料加入搅拌设备中搅拌混合均匀;
步骤2、模具清洁:使用干冰清洗模具,清洗后在模具内喷施脱模剂,同时在模具内型腔内喷模内漆;
步骤3、发泡成型:将步骤1制得的成型材料以及B组分材料通过高压机发泡机将原料混合均匀,通过机器人手臂将混合后的原料注入模具中发泡成型;
步骤4、成品检测:对成型冷却后的产品进行外观检测,所述外观检测包括有修边检测,表面检测。
8.根据权利要求7所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述步骤1成型材料制备过程中最高温度不高于45℃。
9.根据权利要求7所述的一种聚氨酯自结皮发动机罩盖,其特征在于,所述脱模剂选用蜡或硅油。
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