CN113072682B - 一种航天低温贮箱用保温泡沫及其制备方法 - Google Patents
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Abstract
本发明涉及一种航天低温贮箱用保温泡沫及其制备方法。所述保温泡沫包括组分A和组分B,所述组分A包括如下原料:HDI三聚体、聚醚多元醇A;组分B包括如下原料:聚醚多元醇B、聚酯多元醇、泡沫稳定剂、胺催化剂、锡催化剂、发泡剂和水。所述航天低温贮箱用保温泡沫的制备方法,首先分别制备组分A和组分B,再将两者混合后固化即可,得到的保温泡沫经过检测其常温导热系数为0.020~0.029w/m.k,低于对比例的0.037w/m.k,表明保温效果更佳;且经低温‑196℃处理后,实施例所得保温泡沫的导热系数仍保持较低水平,表现出良好的保温性,性能优于对比例。
Description
技术领域
本发明属于高分子材料和航天领域,具体涉及一种航天低温贮箱用保温泡沫及其制备方法。
背景技术
传统的整体喷涂方法加工低温贮箱保温层时,采用的是刚性较强的聚氨酯泡沫配方,而如果改为预制模块的方法,再使用刚性较高的聚氨酯泡沫则并不可行,因为要考虑到保温模块与箱体的贴合度,需要模块具有一定的柔性、韧性和耐低温性能。
通过将传统配方中的聚合MDI(二苯基甲烷二异氰酸酯)用HDI(六亚甲基二异氰酸酯)的三聚体替代,能够实现在不损失其它性能的前提下,提高保温模块的柔韧性和耐低温性能,保证在后期的保温模块铺贴过程中使模块和箱体贴合紧密、牢固,满足保温效果要求,为重复发射利用奠定材料基础。
但目前尚无用HDI三聚体替代聚合MDI来生产聚氨酯保温泡沫的先例,故基于此,提出本发明技术方案。
发明内容
为了解决现有技术存在的问题,本发明提供了一种航天低温贮箱用保温泡沫及其制备方法。所述航天低温贮箱用保温泡沫的制备方法,首先分别制备组分A和组分B,再将两者混合后固化即可,得到的保温泡沫经过检测其常温导热系数为0.020~0.029w/m.k,低于对比例的0.037w/m.k,表明保温效果更佳;且经低温-196℃模拟处理后,实施例所得保温泡沫的导热系数仍保持较低水平,表现出良好的保温性,性能优于对比例。
本发明的方案是,提供一种航天低温贮箱用保温泡沫,包括组分A和组分B,所述组分A包括如下重量份的原料:HDI三聚体15~20份、聚醚多元醇A15~20份;组分B包括如下重量份的原料:聚醚多元醇B 75~80份、聚酯多元醇10~12份、泡沫稳定剂1.8~2.2份、胺催化剂1.6~2份、锡催化剂0.7~0.9份、发泡剂8~10份和水2.2~3份。
其中,聚醚多元醇A、聚醚多元醇B中的“A”、“B”仅用来区分,无实质含义。
优选地,所述组分A包括如下重量份的原料:HDI三聚体15份、聚醚多元醇A 15份;组分B包括如下重量份的原料:聚醚多元醇B 75份、聚酯多元醇10份、泡沫稳定剂1.8份、胺催化剂1.6份、锡催化剂0.7份、发泡剂8份和水2.2份。
优选地,所述聚醚多元醇A为330N,羟值为35mgKOH/g,产自蓝星东大化工。
优选地,所述聚醚多元醇B包括特种聚醚和高活性端氨基聚醚;所述特种聚醚为T403,羟值为380mgKOH/g,产自蓝星东大化工;所述高活性端氨基聚醚为D2000,胺值为56mgKOH/g,产自山东海瑞宝。
优选地,所述聚酯多元醇为SKR-4110,羟值为350mgKOH/g,产自临沂斯科瑞聚氨酯有限公司。
另外,泡沫稳定剂为L580(改性有机硅表面活性剂),供应商为北京北化工程技术有限公司;胺催化剂为33LV(三乙烯二胺的丙二醇溶液),供应商惠州北化工产学研基地有限公司;锡催化剂为T9(辛酸亚锡),供应商为北京化工原料公司;发泡剂为HCFC-141B(一氟二氯乙烷);供应商为北京化工原料公司。
基于相同的技术构思,本发明的再一方案是,提供一种航天低温贮箱用保温泡沫的制备方法,包括如下步骤:
(I)制备组分A,方法为:
(1)将聚醚多元醇A加热并抽真空,进行脱水,得无水精制聚醚多元醇A;
(2)向无水精制聚醚多元醇A中加入HDI三聚体混合搅拌,反应完全即可;
(II)制备组分B,方法为:
(S1)将聚醚多元醇B、聚酯多元醇、泡沫稳定剂混合,升温搅拌,得混合物;
(S2)降至室温后,向混合物中加入胺催化剂、锡催化剂、发泡剂和水,搅拌反应即可;
(III)发泡成型,方法为:
将反应完全的组分A和组分B进行混合固化,完成后即得所述航天低温贮箱用保温泡沫。
优选地,步骤(1)中,于100~110℃条件下脱水;脱水后,所述无水精制聚醚多元醇A含水率小于0.1wt.%。
优选地,步骤(2)中,所述反应的温度为70~90℃,反应的时间为3~4h。
优选地,步骤(S1)中,所述升温至50~70℃,搅拌时间为2~3h。
优选地,步骤(III)中,所述固化的时间为7~10d。
本发明的有益效果为:
本发明所述航天低温贮箱用保温泡沫的制备方法,首先分别制备组分A和组分B,再将两者混合后固化即可,得到的保温泡沫经过检测其常温导热系数为0.020~0.029w/m.k,低于对比例的0.037w/m.k,表明保温效果更佳;且经低温-196℃处理后,实施例所得保温泡沫的导热系数仍保持较低水平,表现出良好的保温性,性能优于对比例。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚,下面将对本发明的技术方案进行详细的描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所得到的所有其它实施方式,都属于本发明所保护的范围。
实施例1
本实施例提供一种航天低温贮箱用保温泡沫的制备方法,包括如下步骤:
(I)制备组分A,方法为:
(1)将150g聚醚多元醇A(330N,35mgKOH/g)加热至100℃并抽真空,进行脱水3h,得含水率小于0.1wt.%的无水精制聚醚多元醇A;
(2)向无水精制聚醚多元醇A中加入150g HDI-100(三聚体)混合搅拌,在70℃条件下反应3h,完全即可;
(II)制备组分B,方法为:
(S1)将650g特种聚醚多元醇T403、100g高活性端氨基聚醚多元醇D2000、100g聚酯多元醇SKR-4110、18g泡沫稳定剂L580进行混合,升温至50℃,搅拌2h,得混合物;
(S2)降至室温后,向混合物中加入16g胺催化剂33LV、7g锡催化剂T9、80g发泡剂HCFC-141B和22g水,搅拌反应3h即可;
(III)发泡成型,方法为:
将反应完全的组分A和组分B分别加入到喷涂机中,并在30℃条件下恒温1h,再按照重量比为1:1进行喷涂混合,室温下固化7d,完成后即得所述航天低温贮箱用保温泡沫。
实施例2
本实施例提供一种航天低温贮箱用保温泡沫的制备方法,包括如下步骤:
(I)制备组分A,方法为:
(1)将200g聚醚多元醇A(330N,35mgKOH/g)加热至110℃并抽真空,进行脱水3h,得含水率小于0.1wt.%的无水精制聚醚多元醇A;
(2)向无水精制聚醚多元醇A中加入200g HDI-100(三聚体)混合搅拌,在90℃条件下反应4h,完全即可;
(II)制备组分B,方法为:
(S1)将700g特种聚醚多元醇T403、100g高活性端氨基聚醚多元醇D2000、120g聚酯多元醇SKR-4110、22g泡沫稳定剂L580进行混合,升温至70℃,搅拌3h,得混合物;
(S2)降至室温后,向混合物中加入20g胺催化剂33LV、9g锡催化剂T9、100g发泡剂HCFC-141B和30g水,搅拌反应3h即可;
(III)发泡成型,方法为:
将反应完全的组分A和组分B分别加入到喷涂机中,并在70℃条件下恒温1h,再按照重量比为1:1进行喷涂混合,室温下固化10d,完成后即得所述航天低温贮箱用保温泡沫。
实施例3
本实施例提供一种航天低温贮箱用保温泡沫的制备方法,包括如下步骤:
(I)制备组分A,方法为:
(1)将175g聚醚多元醇A(330N,35mgKOH/g)加热至105℃并抽真空,进行脱水3h,得含水率小于0.1wt.%的无水精制聚醚多元醇A;
(2)向无水精制聚醚多元醇A中加入175g HDI-100(三聚体)混合搅拌,在80℃条件下反应3.5h,完全即可;
(II)制备组分B,方法为:
(S1)将700g特种聚醚多元醇T403、100g高活性端氨基聚醚多元醇D2000、110g聚酯多元醇SKR-4110、20g泡沫稳定剂L580进行混合,升温至60℃,搅拌2.5h,得混合物;
(S2)降至室温后,向混合物中加入18g胺催化剂33LV、8g锡催化剂T9、90g发泡剂HCFC-141B和26g水,搅拌反应3h即可;
(III)发泡成型,方法为:
将反应完全的组分A和组分B分别加入到喷涂机中,并在50℃条件下恒温1h,再按照重量比为1:1进行喷涂混合,室温下固化8d,完成后即得所述航天低温贮箱用保温泡沫。
对比例
本对比例提供一种航天低温贮箱用保温泡沫的制备方法,与实施例的区别在于,对比例不使用HDI三聚体,而使用聚合MDI(PM-200,烟台万华集团),具体用量如下:
组分A含有:
聚醚多元醇A:150g;
聚合MDI:150g;
组分B含有:
聚醚多元醇T403:650g;
高活性端氨基聚醚D2000:100g;
聚酯多元醇SKR-4110:100g;
泡沫稳定剂L580:18g;
胺催化剂,33LV:16g;
锡催化剂T9:7g;
发泡剂HCFC-141B:80g;
水:25g。
制备方法与实施例一致。
为了检测实施例1~3与对比例所得保温泡沫的性能,进行相关检测,检测结果如表1所示。
表1泡沫性能检测结果
由检测结果可知,实施例所得保温泡沫的导热系数小于对比例,表明其保温性能优于对比例;尤其经-196℃低温条件下处理后,本发明所得保温泡沫的保温性能及压缩强度更优于对比例。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (7)
1.一种航天低温贮箱用保温泡沫,其特征在于,包括组分A和组分B,所述组分A包括如下重量份的原料:HDI三聚体15~20份、聚醚多元醇A15~20份;组分B包括如下重量份的原料:聚醚多元醇B75~80份、聚酯多元醇10~12份、泡沫稳定剂1.8~2.2份、胺催化剂1.6~2份、锡催化剂0.7~0.9份、发泡剂8~10份和水2.2~3份;
所述聚醚多元醇A的羟值为35mgKOH/g;
所述聚醚多元醇B包括特种聚醚和高活性端氨基聚醚;所述特种聚醚羟值为380mgKOH/g;所述高活性端氨基聚醚胺值为56mgKOH/g;
所述聚酯多元醇羟值为350mgKOH/g。
2.根据权利要求1所述航天低温贮箱用保温泡沫,其特征在于,所述组分A包括如下重量份的原料:HDI三聚体15份、聚醚多元醇A15份;组分B包括如下重量份的原料:聚醚多元醇B75份、聚酯多元醇10份、泡沫稳定剂1.8份、胺催化剂1.6份、锡催化剂0.7份、发泡剂8份和水2.2份。
3.权利要求1或2所述航天低温贮箱用保温泡沫的制备方法,其特征在于,包括如下步骤:
(I)制备组分A,方法为:
(1)将聚醚多元醇A加热并抽真空,进行脱水,得无水精制聚醚多元醇A;
(2)向无水精制聚醚多元醇A中加入HDI三聚体混合搅拌,反应完全即可;
(II)制备组分B,方法为:
(S1)将聚醚多元醇B、聚酯多元醇、泡沫稳定剂混合,升温搅拌,得混合物;
(S2)降至室温后,向混合物中加入胺催化剂、锡催化剂、发泡剂和水,搅拌反应即可;
(III)发泡成型,方法为:
将反应完全的组分A和组分B进行混合固化,完成后即得所述航天低温贮箱用保温泡沫。
4.根据权利要求3所述航天低温贮箱用保温泡沫的制备方法,其特征在于,步骤(1)中,于100~110℃条件下脱水;脱水后,所述无水精制聚醚多元醇A含水率小于0.1wt.%。
5.根据权利要求3所述航天低温贮箱用保温泡沫的制备方法,其特征在于,步骤(2)中,所述反应的温度为70~90℃,反应的时间为3~4h。
6.根据权利要求3所述航天低温贮箱用保温泡沫的制备方法,其特征在于,步骤(S1)中,所述升温至50~70℃,搅拌时间为2~3h。
7.根据权利要求3所述航天低温贮箱用保温泡沫的制备方法,其特征在于,步骤(III)中,所述固化的时间为7~10d。
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