CN112375527A - 电池用发泡聚氨酯密封胶组合料及其制备方法 - Google Patents
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Abstract
本发明涉及聚氨酯密封胶技术领域,具体涉及一种电池用发泡聚氨酯密封胶组合料及其制备方法。本发明所述的电池用发泡聚氨酯密封胶组合料,由A组分和B组分按100:100‑110的重量比混合组成;A组分为:聚酯多元醇、聚醚多元醇A、聚酯醚、氢氧化镁、氢氧化铝、N系列阻燃剂、磷系阻燃剂、小分子聚醚多元醇B、发泡剂、泡沫稳定剂、催化剂;B组分为改性MDI。本发明的电池用发泡聚氨酯密封胶组合料,制备的电池密封胶兼具聚酯和聚醚体系的优点,得到的制品不仅重量轻,而且力学性能优异、耐水解性能好,得到的制品离火自熄、无滴落、烟密度低;本发明还提供其制备方法。
Description
技术领域
本发明涉及聚氨酯密封胶技术领域,具体涉及一种电池用发泡聚氨酯密封胶组合料及其制备方法。
背景技术
聚氨酯材料以其良好的耐高低温性、流动性、电绝缘性、阻燃导热性,广泛应用于无人机、新能源汽车、电动车等电池内部线路的密封中。密封胶对电池内部线路的阻燃保护尤为重要,在许多应用中,密封胶的阻燃性能直接关系到整个电池组件的安全。
随着人们对电池安全、环保以及续航里程的要求越来越高,高阻燃、低发烟密度、轻量化成为电池行业的新的需要。而现有的电池密封胶大部分是使用聚氨酯弹性体来做的,虽然力学性能比较好,但是密度比较大(1.1-1.2g/cm3),影响电池的续航能力。
发明内容
本发明的目的是提供一种电池用发泡聚氨酯密封胶组合料,由该组合料制备的电池密封胶兼具聚酯和聚醚体系的优点,得到的制品不仅重量轻(0.6-0.7g/cm3),而且力学性能优异、耐水解性能好,得到的制品离火自熄、无滴落、烟密度低;本发明还提供其制备方法。
本发明所述的电池用发泡聚氨酯密封胶组合料,由A组分和B组分按100:100-110的重量比混合组成;
以质量百分数计,A组分为:
B组分为改性MDI。
聚酯多元醇的官能度为2,羟值为35-60mgKOH/g,数均分子量为2000-3000;优选山东一诺威聚氨酯股份有限公司的PE2530。
聚醚多元醇A为氧化乙烯封端的聚氧化丙烯三醇,官能度为3,数均分子量为7000-8000;优选山东一诺威新材料有限公司的F822。
聚酯醚的官能度为2,羟值为50-80mgKOH/g,酸值≤0.05mgKOH/g;优选山东一诺威新材料有限公司的2000T。
N系列阻燃剂为三聚氰胺,磷系阻燃剂为TCPP。
小分子聚醚多元醇B的官能度为2,分子量为400-600;优选蓝星东大的DL400。
发泡剂为水。
泡沫稳定剂为低雾化的聚硅氧烷-氧化烯烃嵌段共聚物,优选道康宁的DC2525。
催化剂为延迟性胺类催化剂,优选赢创的8154。
改性MDI为聚酯改性MDI,通过聚酯多元醇跟纯MDI、液化MDI在一定的温度下反应制得,其NCO含量为21-23wt%,优选山东一诺威聚氨酯股份有限公司的DXD-3450B。
本发明所述的电池用发泡聚氨酯密封胶组合料的制备方法,步骤如下:
(1)A组分料:先将基于配方量的聚酯多元醇、聚醚多元醇、聚酯醚、氢氧化镁、氢氧化铝、N系阻燃剂、磷系阻燃剂投入应釜中搅拌,升温到50-60℃,充分研磨后,降低温度到40℃以下,然后依次加入计量好的小分子聚醚多元醇、发泡剂、泡沫稳定剂、催化剂,在室温条件下,转速为40-50转/分钟,搅拌0.5-1.0小时,即得A组份;
(2)B组分料:NCO含量为21-23wt%的聚酯改性MDI;
(3)使用时,将A组分和B组分料按质量比100:100-110混合均匀,注入模具中,合模,30min后开模,即得电池用发泡聚氨酯密封胶。
与现有技术相比,本发明有以下有益效果:
(1)本发明采用聚醚多元醇和聚酯多元醇结合,大分子聚醚多元醇、聚酯醚、小分子聚醚扩链剂相互协同作用,在降低制品重量的同时,保证了其依然具有较好的力学性能和耐水解性能;
(2)本发明充分利用氢氧化镁的碳化功能,氢氧化铝的利烟功能,N、P阻燃剂的协同阻燃作用,得到的制品离火自熄、无滴落、烟密度低;
(3)本发明采用延迟性的胺类催化剂提高了组合料的流动性和操作时间。
具体实施方式
以下结合实施例说明本发明,但不限定本发明。
实施例1
按以下原料配比和方法制备电池用发泡聚氨酯密封胶:
A组分为:
B组分为:
DXD-3250B 110kg。
称取30kg的PE2530,15kg的F822、10kg 2000T、5kg的氢氧化镁、10kg的氢氧化铝、8.5kg的三聚氰胺,5kg的TCPP投入反应釜中搅拌,升温到50℃,充分搅拌后,降低温度到40℃以下,然后分别依次加入15kg的DL400、0.5kg的DC2525、0.8kg的H2O、0.2kg的8154,转速为40转/分钟,搅拌0.5小时,即得A组分;
使用时,将A、B组分料按A:B=100:110的质量比混合均匀,注入模具中,合模,30min后开模,即得电池用发泡聚氨酯密封胶。
实施例2
按以下原料配比和方法制备电池用发泡聚氨酯密封胶:
A组分为:
B组分为:
DXD-3250B 100kg。
称取40kg的PE2530,10kg的F822、10kg 2000T、5kg的氢氧化镁、5kg的氢氧化铝、10kg的三聚氰胺,9.2kg的TCPP投入反应釜中搅拌,升温到50℃,充分搅拌后,降低温度到40℃以下,然后分别依次加入10kg的DL400、0.2kg的DC2525、0.5kg的H2O、0.1kg的8154,转速为40转/分钟,搅拌0.5小时,即得A组分;
使用时,将A、B组分料按A:B=100:100的质量比混合均匀,注入模具中,合模,30min后开模,即得电池用发泡聚氨酯密封胶。
实施例3
按以下原料配比和方法制备电池用发泡聚氨酯密封胶:
A组分为:
B组分为:
DXD-3250B 105kg。
称取35kg的PE2530,12kg的F822、7kg 2000T、8kg的氢氧化镁、7.85kg的氢氧化铝、7kg的三聚氰胺,10kg的TCPP投入反应釜中搅拌,升温到50℃,充分搅拌后,降低温度到40℃以下,然后分别依次加入112kg的DL400、0.4kg的DC2525、0.6kg的H2O、0.15kg的8154,转速为40转/分钟,搅拌0.5小时,即得A组分;
使用时,将A、B组分料按A:B=100:105的质量比混合均匀,注入模具中,合模,30min后开模,即得电池用发泡聚氨酯密封胶。
对比例1
本对比例与实施例3相比,不同点仅在于将A组分中聚醚多元醇F822、聚酯醚2000T全部替换为同等质量的聚酯多元醇PE2530。
对比例2
本对比例与实施例3相比,不同点仅在于将A组分中聚醚多元醇F822全部替换为同等质量的聚酯多元醇PE3520。
对比例3
本对比例与实施例3相比,不同点仅在于将A组分中聚醚多元醇F822替换为同等质量的聚醚多元醇330NG(分子量5000,官能度为3)。
对比例4
本对比例与实施例3相比,不同点仅在于将A组分中聚酯醚2000T替换为同等质量的聚醚多元醇F822。
对比例5
本对比例与实施例3相比,不同点仅在于将A组分中小分子聚醚多元醇DL400替换为同等质量的乙二醇。
对比例6
本对比例与实施例3相比,不同点仅在于将A组分中氢氧化镁,替换为同等质量的氢氧化铝。
对比例7
本对比例与实施例3相比,不同点仅在于将A组分中氢氧化铝,替换为同等质量的氢氧化镁。
对比例8
本对比例与实施例3相比,不同点仅在于将A组分中三聚氰胺,替换为同等质量的TCPP。
对比例9
本对比例与实施例3相比,不同点仅在于将A组分中TCPP,替换为同等质量的三聚氰胺。
将实施例1-3和对比例1-9制得的电池用发泡聚氨酯密封胶进行性能测试,其中芯密度按照GB/T 6343-1995标准检测,断裂伸长率、拉伸强度按照GB/T6344-1996标准检测,撕裂强度按照GB/T10808-2006标准检测,阻燃按照按照UL 94-2013Rev.8-2017第8节方法测试,气味按照VW50180标准检测,烟密度按照GB/T8627-2007标准检测,氧指数按照GB/T2406-2008标准检测,耐水解时间是在温度85℃,湿度85%条件下,力学性能保持在90%以上的时间。
测试结果如表1所示。
表1实施例1-3和对比例1-9制得的电池用发泡聚氨酯密封胶的性能测试结果
从表1可以看出,本发明的实施例1-3兼具了聚醚体系和聚酯体系的优点,在降低制品重量的同时,制品依然具有良好的力学性能和耐水解性能,其制品离火自熄、无滴落、烟密度低;对比例1-5对A组分中的聚醚多元醇、聚酯多元醇、聚酯醚、小分子聚醚多元醇进行了不同的替换,制备的产品在与实施例3密度基本一致的条件下,无法兼具良好的力学性能和耐水解性能;对比例6-7对A组分中氢氧化镁、氢氧化铝、N系列阻燃剂和磷系阻燃剂进行了不同替换,制备的产品无法兼具良好的阻燃性能和较低的烟密度。
Claims (9)
2.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:聚酯多元醇的官能度为2,羟值为35-60mgKOH/g,数均分子量为2000-3000。
3.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:聚醚多元醇A为氧化乙烯封端的聚氧化丙烯三醇,官能度为3,数均分子量为7000-8000。
4.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:聚酯醚的官能度为2,羟值为50-80mgKOH/g,酸值≤0.05mgKOH/g。
5.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:N系列阻燃剂为三聚氰胺,磷系阻燃剂为TCPP。
6.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:小分子聚醚多元醇B的官能度为2,分子量为400-600。
7.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:发泡剂为水;
泡沫稳定剂为聚硅氧烷-氧化烯烃嵌段共聚物;
催化剂为延迟性胺类催化剂。
8.根据权利要求1所述的电池用发泡聚氨酯密封胶组合料,其特征在于:改性MDI为聚酯改性MDI,其NCO含量为21-23wt%。
9.一种权利要求1-8任一项所述的电池用发泡聚氨酯密封胶组合料的制备方法,其特征在于:步骤如下:
(1)A组分料:先将基于配方量的聚酯多元醇、聚醚多元醇、聚酯醚、氢氧化镁、氢氧化铝、N系阻燃剂、磷系阻燃剂投入应釜中搅拌,升温到50-60℃,充分研磨后,降低温度到40℃以下,然后依次加入计量好的小分子聚醚多元醇、发泡剂、泡沫稳定剂、催化剂,在室温条件下,转速为40-50转/分钟,搅拌0.5-1.0小时,即得A组分;
(2)B组分料:NCO含量为21-23wt%聚酯改性MDI;
(3)使用时,将A组分和B组分按质量比100:100-110混合均匀,注入模具中,合模,30min后开模,即得电池用发泡聚氨酯密封胶。
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