CN112778959B - 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 PDFInfo
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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
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:
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
表2
表3
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:
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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