CN106380575B - 一种空气机械发泡型聚氨酯贝斯专用树脂及其制备方法 - Google Patents

一种空气机械发泡型聚氨酯贝斯专用树脂及其制备方法 Download PDF

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CN106380575B
CN106380575B CN201610837759.4A CN201610837759A CN106380575B CN 106380575 B CN106380575 B CN 106380575B CN 201610837759 A CN201610837759 A CN 201610837759A CN 106380575 B CN106380575 B CN 106380575B
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芮小平
芮洪平
孙永新
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Wuxi City Laeso New Mstar Technology Ltd
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Abstract

本发明公开了一种空气机械发泡型聚氨酯贝斯专用树脂,由以下组份组成:聚醚多元醇、MDI、HDI、1.4丁二醇、DMPA、NMP、TEA、乙二胺和去离子水组成,其中MDI即为二苯基甲烷二异氰酸酯,HDI即为六亚甲基二异氰酸酯,DMPA即为二羟甲基丙酸,TEA即为三乙基胺,NCO值为100g试样所含的异氰酸酯基团的质量。本发明不但简化了工艺、降低了能耗,而且应用在贝斯上解决了贝斯在烘烤成型过程中容易出现开裂,做成贝斯过水揉纹后树脂容易脱落、泛白、耐水解性差、强度差的问题,而且贝斯在压花后揉纹水洗,纹路饱满无变化,手感柔软度可调。

Description

一种空气机械发泡型聚氨酯贝斯专用树脂及其制备方法
技术领域
本发明涉及一种树脂,具体涉及一种空气机械发泡型聚氨酯贝斯专用树脂。
背景技术
目前市场上应用的机械发泡水性PU树脂,大都用聚酯、聚醚作软段脂肪族或芳香族异氰酸酯为硬段,添加亲水性扩链剂,用丙酮稀释成盐后加水分散,脱除丙酮后成50-60%的pu乳液,按此配方工艺生产的机械发泡树脂,一方面需脱丙酮,增加能耗,另外,经国内多家皮革企业试制贝斯后发现如下问题:
1、贝斯在烘烤成型过程中出现开裂现象;
2、做成贝斯过水揉纹后,脱落,泛白、耐水性差,强度差;
3、如做压纹产品,不是热压后纹路反弹严重,就是热压后产品手感僵硬。
发明内容
发明目的:为了克服现有技术中存在的能耗高、烘烤开裂、耐水解性差、强度差、脱落泛白、热压成型性差,手感僵硬的问题,提供一种能耗低、烘烤不易开裂、耐水解性好、热压成型性好、手感柔软度可调的空气机械发泡型聚氨酯贝斯专用树脂。
技术方案:为实现上述目的,本发明提供一种空气机械发泡型聚氨酯贝斯专用树脂,按重量份数由以下组份组成:聚醚多元醇200份、MDI180~207份、HDI12~30份、1.4丁二醇17.5~21份、DMPA26~30份、NMP50~52份、TEA20~22.5份、乙二胺9.5~10份、去离子水437~448份。
进一步地,一种空气机械发泡型聚氨酯贝斯专用树脂,按重量份数由以下组份组成:聚醚多元醇200份、MDI190~195份、HDI15~20份、1.4丁二醇19~20.5份、DMPA27~29份、NMP51~52份、TEA21~22份、乙二胺9.5~9.8份、去离子水440~445份。
进一步地,所述聚醚多元醇的分子量为1000。
一种空气机械发泡型聚氨酯贝斯专用树脂的制备方法,包括以下具体步骤:
1)首先将聚醚多元醇加热升温至107℃~113℃,然后对其进行脱水干燥后降温至45℃;
2)然后向聚醚多元醇中投入HDI和MDI,待自然升温结束后加热至80℃保温2小时;
3)将步骤2)中聚醚多元醇、HDI和MDI的混合物降温至50℃后,向其中加入1.4丁二醇以及DMPA与NMP的混合液进行扩链反应,将温度提升至85℃,保持温度为85℃进行反应,直至NCO值达到理论值后降温至40℃以下,将混合物放入干燥分散釜内;
4)在干燥分散釜的高速搅拌过程中,向其中放入含有TEA的去离子水,中和分散同时进行,待分散开后同时滴加乙二胺的水溶液进行后扩链,在20分钟高速分散后降低转速继续分散1小时;
5)最后进行过滤得到树脂成品,对树脂成品进行包装封存。
进一步地,所述步骤1)中聚醚多元醇加热升温后的温度为110℃。
进一步地,所述步骤5)中树脂成品的剥离强度在2~4KG/3cm。
有益效果:本发明与现有技术相比,具备如下优点:
1)整个制备工艺当中无需添加丙酮进行稀释,所以后期无需对丙酮进行脱除,不但简化了工艺步骤,而且降低了能耗;
2)MDI具有刚性苯环和结晶能力,耐水解能力和强度比TDI好,HDI一方面降低了活化温度,另一方面加强了产品的粘接性能,二种异氰酸酯的配合,充分发挥各自的优势,最后成品树脂的热压成型性、回弹性、耐水解性能和剥离强度都得到显著提高;
3)通过本发明的配方以及工艺制成的成品树脂的剥离强度在2~4KG/3cm,应用在贝斯上不但解决了贝斯在烘烤成型过程中容易出现开裂,做成贝斯过水揉纹后树脂容易脱落、泛白、耐水解性差、强度差的问题,而且贝斯在压花后揉纹水洗,纹路饱满无变化,手感柔软度可调。
具体实施方式
下面结合实施例对本发明作更进一步的说明。
实施例一:
一种空气机械发泡型聚氨酯贝斯专用树脂,按重量份数由以下组份组成:1000分子量的聚醚多元醇200份、MDI180份、HDI12份、1.4丁二醇17.5份、DMPA26份、NMP50份、TEA20份、乙二胺9.5份、去离子水437份。
将DMPA和NMP混合在一起制成DMPA和NMP的混合液,将TEA加入到去离子水中。
首先将聚醚多元醇加热升温至107℃,然后对其进行脱水干燥后降温至45℃,然后向聚醚多元醇中投入HDI和MDI,待自然升温结束后加热至80℃保温2小时,将聚醚多元醇、HDI和MDI的混合物降温至50℃后,向其中加入1.4丁二醇以及DMPA与NMP的混合液进行扩链反应,将温度提升至85℃,保持温度为85℃进行反应,直至NCO值达到理论值后降温至39℃,将混合物放入干燥分散釜内,在干燥分散釜的高速搅拌过程中,向其中放入含有TEA的去离子水,中和分散同时进行,待分散开后同时滴加乙二胺的水溶液进行后扩链,在20分钟高速分散后降低转速继续分散1小时,最后进行过滤得到树脂成品,对树脂成品进行包装封存。
将所得到的树脂成品进行检测,得到剥离强度为2KG/3cm;将所得到的树脂成品放置于10%NAOH溶液内浸泡48小时,树脂无变化,树脂的耐水解性能非常好。
将所得树脂成品应用在贝斯上,贝斯在烘烤成型过程中没有出现开裂现象,做成贝斯过水揉纹后,树脂没有出现脱落、泛白,贝斯在压花后揉纹水洗,纹路饱满无变化,手感柔软舒服、不僵硬。
实施例二:
一种空气机械发泡型聚氨酯贝斯专用树脂,按重量份数由以下组份组成:1000分子量的聚醚多元醇200份、MDI207份、HDI30份、1.4丁二醇21份、DMPA30份、NMP52份、TEA22.5份、乙二胺10份、去离子水448份。
将DMPA和NMP混合在一起制成DMPA和NMP的混合液,将TEA加入到去离子水中。
首先将聚醚多元醇加热升温至113℃,然后对其进行脱水干燥后降温至45℃,然后向聚醚多元醇中投入HDI和MDI,待自然升温结束后加热至80℃保温2小时,将聚醚多元醇、HDI和MDI的混合物降温至50℃后,向其中加入1.4丁二醇以及DMPA与NMP的混合液进行扩链反应,将温度提升至85℃,保持温度为85℃进行反应,直至NCO值达到理论值后降温至38℃,将混合物放入干燥分散釜内,在干燥分散釜的高速搅拌过程中,向其中放入含有TEA的去离子水,中和分散同时进行,待分散开后同时滴加乙二胺的水溶液进行后扩链,在20分钟高速分散后降低转速继续分散1小时,最后进行过滤得到树脂成品,对树脂成品进行包装封存。
将所得到的树脂成品进行检测,得到剥离强度为4KG/3cm;将所得到的树脂成品放置于10%NAOH溶液内浸泡48小时,树脂无变化,树脂的耐水解性能非常好。
将所得树脂成品应用在贝斯上,贝斯在烘烤成型过程中没有出现开裂现象,做成贝斯过水揉纹后,树脂没有出现脱落、泛白,贝斯在压花后揉纹水洗,纹路饱满无变化,手感柔软舒服、不僵硬。
实施例三:
一种空气机械发泡型聚氨酯贝斯专用树脂,按重量份数由以下组份组成:1000分子量的聚醚多元醇200份、MDI195份、HDI20份、1.4丁二醇19.5份、DMPA28份、NMP51份、TEA21份、乙二胺9.8份、去离子水443份。
将DMPA和NMP混合在一起制成DMPA和NMP的混合液,将TEA加入到去离子水中。
首先将聚醚多元醇加热升温至110℃,然后对其进行脱水干燥后降温至45℃,然后向聚醚多元醇中投入HDI和MDI,待自然升温结束后加热至80℃保温2小时,将聚醚多元醇、HDI和MDI的混合物降温至50℃后,向其中加入1.4丁二醇以及DMPA与NMP的混合液进行扩链反应,将温度提升至85℃,保持温度为85℃进行反应,直至NCO值达到理论值后降温至38.5℃,将混合物放入干燥分散釜内,在干燥分散釜的高速搅拌过程中,向其中放入含有TEA的去离子水,中和分散同时进行,待分散开后同时滴加乙二胺的水溶液进行后扩链,在20分钟高速分散后降低转速继续分散1小时,最后进行过滤得到树脂成品,对树脂成品进行包装封存。
将所得到的树脂成品进行检测,得到剥离强度为4KG/3cm;将所得到的树脂成品放置于10%NAOH溶液内浸泡48小时,树脂无变化,树脂的耐水解性能非常好。
将所得树脂成品应用在贝斯上,贝斯在烘烤成型过程中没有出现开裂现象,做成贝斯过水揉纹后,树脂没有出现脱落、泛白,贝斯在压花后揉纹水洗,纹路饱满无变化,手感柔软舒服、不僵硬。
以上所述仅是本发明的优选实施方式,应当指出:对于本技术领域的技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (5)

1.一种空气机械发泡型聚氨酯贝斯专用树脂,其特征在于:按重量份数由以下组份组成:聚醚多元醇200份、MDI180~207份、HDI12~30份、1.4丁二醇17.5~21份、DMPA26~30份、NMP50~52份、TEA20~22.5份、乙二胺9.5~10份、去离子水437~448份,所述聚醚多元醇的分子量为1000。
2.根据权利要求1所述的一种空气机械发泡型聚氨酯贝斯专用树脂,其特征在于:按重量份数由以下组份组成:聚醚多元醇200份、MDI190~195份、HDI15~20份、1.4丁二醇19~20.5份、DMPA27~29份、NMP51~52份、TEA21~22份、乙二胺9.5~9.8份、去离子水440~445份。
3.根据权利要求1所述的一种空气机械发泡型聚氨酯贝斯专用树脂的制备方法,其特征在于:包括以下具体步骤:
1)首先将聚醚多元醇加热升温至107℃~113℃,然后对其进行脱水干燥后降温至45℃;
2)然后向聚醚多元醇中投入HDI和MDI,待自然升温结束后加热至80℃保温2小时;
3)将步骤2)中聚醚多元醇、HDI和MDI的混合物降温至50℃后,向其中加入1.4丁二醇以及DMPA与NMP的混合液进行扩链反应,将温度提升至85℃,保持温度为85℃进行反应,直至NCO值达到理论值后降温至40℃以下,将混合物放入干燥分散釜内;
4)在干燥分散釜的高速搅拌过程中,向其中放入含有TEA的去离子水,中和分散同时进行,待分散开后同时滴加乙二胺的水溶液进行后扩链,在20分钟高速分散后降低转速继续分散1小时;
5)最后进行过滤得到树脂成品,对树脂成品进行包装封存。
4.根据权利要求3所述的一种空气机械发泡型聚氨酯贝斯专用树脂的制备方法,其特征在于:所述步骤1)中聚醚多元醇加热升温后的温度为110℃。
5.根据权利要求3所述的一种空气机械发泡型聚氨酯贝斯专用树脂的制备方法,其特征在于:所述步骤5)中树脂成品的剥离强度在2~4KG/3cm。
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