CN112778959A - 一种高强度耐湿热双组分pu胶黏剂及其制备方法 - Google Patents

一种高强度耐湿热双组分pu胶黏剂及其制备方法 Download PDF

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CN112778959A
CN112778959A CN202011622135.3A CN202011622135A CN112778959A CN 112778959 A CN112778959 A CN 112778959A CN 202011622135 A CN202011622135 A CN 202011622135A CN 112778959 A CN112778959 A CN 112778959A
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李贯中
林志秀
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Xintai Yonghe Yantai New Material Co ltd
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Abstract

本发明公开了一种高强度耐湿热双组分PU胶黏剂，包括A组分和B组分，A组分由以下重量份的物质组成：多元醇50份、填料25份和催化剂0.01份；B组分为改性异氰酸酯固化剂。本发明的有益效果是：本发明高强度耐湿热双组分PU胶黏剂具有良好的耐湿热性能，与其他树脂相容性好且对不同材质均具有较高的粘接强度；且具有高强度，耐湿热性，良好的导热阻燃性能，尤其适合在轨道交通内饰上的应用，并广泛应用汽车装饰、笔记本电脑、机器人和智能家居等不同的领域。

Description

一种高强度耐湿热双组分PU胶黏剂及其制备方法
技术领域
本发明涉及胶黏剂领域，尤其涉及一种高强度耐湿热双组分PU胶黏剂及其制备方法。
背景技术
用于轨道交通的耐湿热型双组分聚氨酯胶粘剂，要求高强度，高韧性，阻燃性和耐湿热性，适合不同材质的粘接；具有高强度，耐溶剂和耐高温等特点。与传统胶粘剂相比，耐湿热型双组分PU胶粘剂具有耐高温和更强的耐水的特性，可在高温高湿的情况下保持高强度并且阻断水汽，且具有良好的韧性，在轨道交通上的应用上具有独特的优势，可以解决传统固化胶粘剂面临的一些局限性。双组分聚氨酯胶黏剂具有高强度，性能优异，物性广泛、粘接适用范围广的特点，广泛应用于各种领域。但是在一些特殊场景除了对高强度的要求外还需要耐湿热老化性能。耐湿热型双组分PU胶粘剂弥补了这些不足，大大提高了新轨道交通的安全和可靠性。
发明内容
本发明针对上述目的，提供一种高强度耐湿热双组分PU胶黏剂，包括A组分和B组分，所述A组分由以下重量份的物质组成：多元醇50份、填料25份和催化剂0.01份；所述B组分为改性异氰酸酯固化剂，具有如式Ⅰ-式Ⅲ的结构：
Figure BDA0002878552800000021
其中，
R为异氰酸酯为TDI、MDI、HMDI、HDI、IPDI或PAPI反应后的残留基团；
R’为聚醚胺、聚醚多元醇或聚酯多元醇反应后的残留基团；
R”为γ-氨丙基三乙氧基硅烷、γ-(2,3-环氧丙氧)丙基三甲氧基硅烷、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷、乙烯基三(β-甲氧基乙氧基)硅烷、乙烯基三甲氧基硅烷或乙烯基三乙氧基硅烷反应后的残留基团；
n、m和m’为1-200的常数。
进一步，所述多元醇选自PPG1000、PPG2000、PPG3000、PTMEG1000、PTMEG2000、PTMEG3000、PCL1000、PCL2000、PCL3000、XCP-2000IPS、蓖麻油及其衍生物、1,4丁二醇、1,3丙二醇或1,6己二醇中的一种或多种；所述聚醚胺为D400、D2000、ED600或ED900中的一种或几种；所述聚醚多元醇为PPG1000、PPG2000、PPG3000、PTMEG1000、PTMEG2000或PTMEG3000中的一种或多种；所述聚酯多元醇为PCL1000、PCL2000、PCL3000或XCP-2000IPS中的一种或多种；所述填料为碳酸钙和/或分子筛；所述催化剂为有机铋催化剂或/和有机锌催化剂。
本发明高强度耐湿热双组分PU胶黏剂的制备方法，包括以下步骤：
1)制备A组分：按重量份称取各物质，混合物搅拌均匀，脱泡，密封保存；
2)制备改性异氰酸酯固化剂：将聚醚胺加热至100-120℃，真空脱水2h后降至20-30℃，加入异氰酸酯，冰浴，真空脱泡，缓慢搅拌反应2h，得预聚体；将聚醚多元醇加热至110-120℃，真空脱水2h后降至40-60℃，加入硅系偶联剂和预聚体，缓慢升温至70-90℃，真空脱泡反应2h，即得。
步骤2)中，以所述异氰酸酯为100重量份计，所述聚醚胺为10-160重量份；所述聚醚多元醇为10-160重量份；所述硅系偶联剂0.1-5重量份。
本发明的有益效果是：本发明高强度耐湿热双组分PU胶黏剂具有良好的耐湿热性能，与其他树脂相容性好且对不同材质均具有较高的粘接强度；且具有高强度，耐湿热性，良好的导热阻燃性能，尤其适合在轨道交通内饰上的应用，并广泛应用汽车装饰、笔记本电脑、机器人和智能家居等不同的领域。
具体实施方式
以下结合实例对本发明进行描述，所举实例只用于解释本发明，并非用于限定本发明的范围。
一、制备改性异氰酸酯固化剂
1、称取80g的D400置于三口瓶中，升温至110℃真空脱水2小时后，降温至25℃以下，加入130g PAPI，冰浴，真空脱泡的条件下，缓慢搅拌反应2小时得预聚体；称取20g的PPG2000，置于三口瓶中，升温至110℃真空脱水2小时后，降温至50℃以下，加入0.5gγ-氨丙基三乙氧基硅烷和200g预聚体缓慢升温至80℃，在真空脱泡的条件下反应2小时得改性异氰酸酯固化剂A。
2、称取160g的ED900置于三口瓶中，升温至100℃真空脱水2小时后，降温至20℃以下，加入100g的MDI，冰浴，真空脱泡的条件下，缓慢搅拌反应2小时得预聚体；称取10g的PTMEG1000，置于三口瓶中，升温至100℃真空脱水2小时后，降温至60℃以下，加入硅系偶联剂5g乙烯基三(β-甲氧基乙氧基)硅烷和300g预聚体缓慢升温至70℃，在真空脱泡的条件下反应2小时得改性异氰酸酯固化剂B。
3、称取15g的D2000置于三口瓶中，升温至120℃真空脱水2小时后，降温至30℃以下，加入150g HDI，冰浴，真空脱泡的条件下，缓慢搅拌反应2小时得预聚体；称取100g的PTMEG3000，置于三口瓶中，升温至100℃真空脱水2小时后，降温至40℃以下，加入硅系偶联剂2g乙烯基三乙氧基硅烷和100g预聚体缓慢升温至90℃，在真空脱泡的条件下反应2小时得改性异氰酸酯固化剂C。
实施例1-3高强度耐湿热双组分PU胶黏剂的配方如表1-表3所示。
表1
Figure BDA0002878552800000041
表2
Figure BDA0002878552800000051
表3
Figure BDA0002878552800000052
实施例1-3中，A组分的制备为：按重量份称取各物质，混合物搅拌均匀，脱泡，密封保存。
对实施例1-3所得高强度耐湿热双组分PU胶黏剂进行相关指标检测，如表4所示。测试结果表明：本发明的改性异氰酸酯固化剂具有良好的柔韧性，与其他多元醇相容性好且对不同材质均具有较高的粘接强度。
表4.实施例1-3胶黏剂指标检测数据
实施例1 实施例2 实施例3
混合粘度(cp) 20000 25000 23000
初固时间(min) 10 10 10
邵氏硬度(D) 50 45 55
剪切强度PC/PC(MPa) 6 6 7
剪切强度AL/AL(MPa) 8 7.5 8.5
85℃RH851000h 良好 良好 良好
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (7)

1.一种高强度耐湿热双组分PU胶黏剂，包括A组分和B组分，其特征在于，
所述A组分由以下重量份的物质组成：多元醇40-60份、填料20-30份和催化剂0.005-0.015份；
所述B组分为改性异氰酸酯固化剂，具有如式Ⅰ-式Ⅲ的结构：
Figure FDA0002878552790000011
其中，
R为异氰酸酯为TDI、MDI、HMDI、HDI、IPDI或PAPI反应后的残留基团；
R’为聚醚胺、聚醚多元醇或聚酯多元醇反应后的残留基团；
R”为γ-氨丙基三乙氧基硅烷、γ-(2,3-环氧丙氧)丙基三甲氧基硅烷、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷、乙烯基三(β-甲氧基乙氧基)硅烷、乙烯基三甲氧基硅烷或乙烯基三乙氧基硅烷反应后的残留基团；
n、m和m’为1-200的常数。
2.根据权利要求1所述的高强度耐湿热双组分PU胶黏剂，其特征在于，所述多元醇选自PPG1000、PPG2000、PPG3000、PTMEG1000、PTMEG2000、PTMEG3000、PCL1000、PCL2000、PCL3000、XCP-2000IPS、蓖麻油及其衍生物、1,4丁二醇、1,3丙二醇或1,6己二醇中的一种或多种。
3.根据权利要求1所述的高强度耐湿热双组分PU胶黏剂，其特征在于，所述聚醚胺为D400、D2000、ED600或ED900中的一种或几种；所述聚醚多元醇为PPG1000、PPG2000、PPG3000、PTMEG1000、PTMEG2000或PTMEG3000中的一种或多种；所述聚酯多元醇为PCL1000、PCL2000、PCL3000或XCP-2000IPS中的一种或多种。
4.根据权利要求1所述的高强度耐湿热双组分PU胶黏剂，其特征在于，所述填料为碳酸钙和/或分子筛。
5.根据权利要求1所述的高强度耐湿热双组分PU胶黏剂，其特征在于，所述催化剂为有机铋催化剂或/和有机锌催化剂。
6.一种如根据权利要求1-5任一项所述的高强度耐湿热双组分PU胶黏剂的制备方法，其特征在于，包括以下步骤：
1)制备A组分：按重量份称取各物质，混合物搅拌均匀，脱泡，密封保存；
2)制备改性异氰酸酯固化剂：将聚醚胺加热至100-120℃，真空脱水2h后降至20-30℃，加入异氰酸酯，冰浴，真空脱泡，缓慢搅拌反应2h，得预聚体；将聚醚多元醇加热至110-120℃，真空脱水2h后降至40-60℃，加入硅系偶联剂和预聚体，缓慢升温至70-90℃，真空脱泡反应2h，即得。
7.根据权利要求6所述的方法，其特征在于，步骤2)中，以所述异氰酸酯为100重量份计，所述聚醚胺为10-160重量份；所述聚醚多元醇为10-160重量份；所述硅系偶联剂0.1-5重量份。
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