双组分聚氨酯用胶粘剂

研制出一种具有较高初粘性的双组分胶粘剂,并对其配比,涂胶时间和温度、涂胶次数等影响粘结强度的因素进行了研究,将到其适应宾配比为ω（Ａ）：ω（Ｂ）＝１００：５－１０（最好为１００：７－８）,活化条件４０－６０℃,活化时间１０ｍｉｎ－１５ｍｉｎ。在此条件下,该胶粘剂对各种鞋用材料的粘合均显示出较高的初粘性（剥离度大于１００Ｎ／２．５ｃｍ）及终粘力。用此胶粘剂进行帮底粘接后,其剥强度在１ｈ内即右国家ＧＦ     

双组分醇溶型聚氨酯胶粘剂的研制

通过分子结构设计,利用异佛尔酮二异氰酸酯（IPDI）预聚物与异佛尔酮二胺（IPDA）扩链反应,合成端氨基聚氨酯主胶,再以环氧树脂为固化剂、乙醇为溶剂,成功制备了双组分醇溶型聚氨酯胶粘剂。研究了第二层膜复膜时间对固化后包装膜形貌的影响,得出在第二层复膜时要充分挥发溶剂。通过测定不同配方的固化时间,发现预聚物分子链越长,固化越慢。同时,比较了自制样品与通用聚氨酯胶粘剂产品的粘度与剥离强度,证实了自制双组分醇溶型聚氨酯胶粘剂的性能与市场上的产品相当,且可通过加大固化剂的添加比例来提高力学性能。     

醇溶性聚氨酯胶粘剂的现状与发展

醇溶性聚氨酯胶粘剂是一种新型的环保型产品,有着比水性聚氨酯更优异的性能,与无溶剂型胶粘剂一样,也代表着复膜胶粘剂行业发展的方向。本文归纳了醇溶性聚氨酯胶粘剂的优点和使用局限性,并对聚氨酯发展趋势进行了分析。     

双组分聚氨酯鞋用胶粘剂

研制出一种具有较高初粘性的双组分胶粘剂,并对其配比、涂胶时间和温度、涂胶次数等影响粘结强度的因素进行了研究,找到其适宜的配比为ω(A):ω(B)=100:5～10(最好为100:7～8),活化条件40℃～60℃,活化时间10min～15min。在此条件下,该胶粘剂对各种鞋用材料的粘合均显示出较高的初粘性(剥离强度大于100N/2.5cm)及终粘力。用此胶粘剂进行帮底粘接后,其剥离强度在1h内即达国标GB1002的要求。     

聚氨酯改性环氧胶粘剂的研究

聚氨酯预聚体通过催化剂与环氧树脂接枝反应合成了蒙氨酯改性环氧树脂。该树脂在改性胺和催化剂作用下，具有良好的施工性能和较高的强度，对极性基材和非极性PE材料具有良好的粘接性能。     

聚碳酸酯二醇型水性聚氨酯胶粘剂的研究

采用预聚体分散法制备了一系列聚碳酸酯二醇(PCDL)型水性聚氨酯(WPU)胶粘剂,并借助傅里叶变换红外光谱(FT-IR)法来跟踪预聚体的合成过程,同时还考察了该WPU胶粘剂的粘度、热稳定性和初粘强度等性能。实验结果表明,PCDL的结构和相对分子质量对该WPU胶粘剂的性能影响很大;以PCDLT-6002为原料制备的WPU胶粘剂,其粘度最低(175 mPa.s)、热稳定性最好、软链段玻璃化转变温度(Tg)最低(-33.97℃)、有软段结晶熔融峰且初粘强度最高(81N/25 mm,此时活化温度为70℃)。     

无溶剂型双组分环氧封端聚氨酯胶粘剂的制备及性能

用液化改性二苯基甲烷-4,4'-二异氰酸酯(MDI)、蓖麻油和环氧树脂(E-51)为主要原料,在特定的反应条件下首先合成以-NCO封端的聚氨酯(PU)预聚体,再与环氧树脂E-51反应,然后将PU预聚体接枝到E-51,制成无溶剂型环氧封端聚氨酯.探究了不同活性稀释剂的加入对PU/EP体系黏度的影响以及不同固化剂的PU/E...     

环氧树脂改性醇溶性聚氨酯胶粘剂的制备与性能

醇溶性聚氨酯胶粘剂是一种新型的环保型产品,有着比水性聚氨酯更优异的性能。本实验采用聚醚210、甲苯二异氰酸酯（TDI）为主要原料,在特定条件下合成聚氨酯预聚体,然后加入交联剂三羟甲基丙烷（TMP）,扩链剂二羟甲基丙酸（DMPA）和一缩二乙二醇（DEG）,再加入成盐剂三乙胺,乙醇做分散介质制成醇溶聚氨酯乳液。将乳液制成胶膜,然后通过对胶膜进行力学强度、拉仲剪切强度、吸水率、红外光谱（IR）、差示扫描量热法（DSC）透射电子显微镜（TEM）等测试,探讨了异氰酸酯基（-NCO）与羟基（-OH）的摩尔比对涂膜力学性能的影响;羧基（-COOH）含量对乳液性能及胶膜力学性能的影响,结果表明了环氧树脂参与了反应达到改性的目的。     

废聚酯醇解制备聚氨酯胶粘剂的研究

以聚醚多元醇(PPG)和4,4′-二苯基甲烷二异氰酸酯(MDI-100LL)为原料制备了含有-NCO的聚氨酯(PU)胶粘剂的A组分,将废聚酯(PET)通过醇解、酯化和缩聚等步骤制得含有-OH的PU胶粘剂的B组分,讨论了反应条件对A组分和B组分性能的影响。结果表明:制备A组分时,反应温度80℃,反应时间3 h;制备B组分时,废PET醇解温度195～210℃(反应时间3.5 h),酯化温度140～150℃(反应时间60 min),缩聚温度190～210℃(反应时间30 min)。调节双组分的配比,可以制备出满足不同施工要求的胶粘剂,当n(A组分)∶n(B组分)=1.30∶1时,胶粘剂的粘接效果最佳;固化后PU胶膜的玻璃化转变温度(Tg)达到-31℃。     

发泡型单组分聚氨酯胶粘剂

发泡型单组分聚氨酯胶粘剂(MPU胶)是通过空气中潮气或水而固化的一种胶粘剂。其特点是单组分、无溶剂、使用工艺简单、贮存运输方便、性能优异,固化后具有类似橡胶的弹性、又具有与塑料相近的高强度、同时也具有良好的耐低温性能、耐油、耐水、耐化学腐蚀、耐冲击、耐臭氧、电绝缘性好等特点。     

光固化聚氨酯丙烯酸酯胶粘剂的制备

以聚醚二元醇、甲苯二异氰酸酯(TDI)和丙烯酸羟丙酯(HPA)为原料,合成了聚氨酯丙烯酸酯树脂.并以此为主体树脂,通过添加光引发剂、活性稀释剂、增塑剂和偶联剂等助剂制备光固化聚氨酯丙烯酸酯胶粘剂.研究了HPA用量、活性稀释剂用量和n(-NCO):n(-OH)比值等因素对胶粘剂性能的影响.实验结果表明,当w(活性稀释剂)=50%～60%、w(HPA)=10%～15%、w(偶联剂)=3%～5%、w(光引发剂)=0.2%～0.5%、w(增塑剂)=1S%～20%和,n(-NCO):n(-OH)=0.95:1时,胶粘剂的综合性能较好.     

Preparation and properties of waterborne polyurethane adhesives modified by polystyrene

Waterborne polyurethane (WPU) adhesives modified by polystyrene (PS) were prepared through a prepolymer mixing process from diisocyanates, an anionic polyester, internal emulsifiers, a neutralizer, a chain extender, and PS dispersions. The latter was preformed via the in situ polymerization of styrene in poly(1,4‐butanediol adipate) diol. Transmission electron microscopy, Fourier transform infrared spectroscopy, and ¹H‐NMR techniques were used to characterize the PS dispersions and polyurethane (PU)–PS prepolymer. Experimental results with respect to the performance of the PU–PS adhesives indicate that suitable PS/polyester diol weight ratios improved the mechanical properties, thermal stability, water resistance, and initial adhesive strength of the pristine WPU adhesives. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Preparation and characterization of one-component polyurethane powder adhesives by the solution polymerization technology

A new technology integrating the synthesis and granulation was adopted to prepare the one-component polyurethane powder adhesives (PPAs) by the solution polymerization. The influence of R_total, neutralization, and types of dispersion solution on the properties of PPAs was investigated. It was found that the initial melting temperature increased and storage stability decreased with increasing R_total. The neutralization reaction between the carboxylic group and amino group made the reduction of the sizing temperature and the increase of the T-peel adhesion strength. The granulation behaviors of the polyurethane (PU) prepolymer under different dispersion solutions showed that the PU prepolymer can be effectively blocked by the 20–30 wt % NaHSO₃ or n-butyl alcohol. Furthermore, the blocked polymers formed small particles with the ideal sizing temperature and peel strength. The excellent adhesive property and thermal stability of PPAs could meet the requirements of the industrial gluing in the fields of packaging, lining, and footwear. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47898.     

水性聚氨酯胶粘剂

介绍了水性聚氨酯胶粘剂的合成方法、粘接原理和其发展方向。     

纳米SiO_2改性水性聚氨酯胶粘剂的制备及性能

以PBA(聚酯二元醇)、IPDI(异佛尔酮二异氰酸酯)、DMPA(2,2-二羟甲基丙酸)和BDO(1,4-丁二醇)为原料,DBTDL(二月桂酸二丁基锡)为催化剂,TEA(三乙胺)为中和剂,乙二胺为扩链剂,水为介质,采用共混法和原位聚合法合成了纳米SiO_2(纳米二氧化硅)改性WPU(水性聚氨酯)胶粘剂。研究结果表明:纳米SiO_2能有效提高WPU胶膜的热稳定性,并且采用原位聚合法制得的纳米SiO_2改性WPU胶粘剂之性能优于共混法;当w(纳米SiO_2)=2.0%、w(DMPA)=4.7%(均相对于预聚体质量而言)和R=n(—NCO)/n(—OH)=3.0时,采用原位聚合法制得的纳米SiO_2改性WPU胶粘剂的综合性能相对最佳。     

Survey of polyurethane adhesives

Polyurethane chemistry provides a means to ‘tailor’ adhesives to specific needs. This is being achieved by polyurethane technology at a cost of more sophisticated application/bonding equipment and a need for better control of raw materials and adhesive processing conditions.     

高性能水性聚氨酯胶粘剂

综述了国内外水性聚氨酯进展概况 ,指出亲水性单体引入聚氨酯预聚体后自乳化是目前制备水性聚氨酯的主要方法。结合作者一些实际工作经验探讨了改进和提高水性聚氨酯性能的途径和方法 ,最后对发展我国高性能水性聚氨酯胶粘剂进行了展望     

Preparation of waterborne polyurethane adhesives based on macromolecular-diols containing different diisocyanate

ABSTRACT

Three different macromolecular diols were synthesized by the reaction of Poly(1,4-butanediol adipate) diol (PBA) and diisocyanate (Isophorone diisocyanate (IPDI), Hexamethylene diisocyanate (HDI) and Methylene-bis(4-cyclohexylisocyanate)(HMDI)) at the ratio of 2:1. Based on these macromolecular diols, waterborne polyurethane (WPU) adhesives were prepared. The structure and molecular weights of the WPU were characterized by Nuclear magnetic resonance spectroscopy (¹H NMR), Fourier Transform Infrared Spectroscopy (FTIR) and Gel permeation chromatography (GPC) respectively. Furthermore, the hydrogen bonding interaction of WPU were analyzed by the deconvolution FTIR spectra. The results showed that the hydrogen bonded NH was increased when carbamate was in the soft segment. The crystallinity of WPU was tested by X-ray diffraction (XRD) and Differential scanning calorimetry (DSC). The results showed that the crystallinity of WPU2 (HDI) and WPU3 (HMDI) were enhanced, especially for WPU2. Meanwhile, the Tg,s as well as the mechanical strength, storage modulus, the contact angle and thermo-stability were increased with the introduced carbamate into soft segment. The T-peel tests of plasticized PVC/WPU/plasticized PVC joints and lap-shear tests of wood/WPU adhesive/wood joints were carried out. The results indicated that the carbamate in the soft segment could significantly enhance the adhesion of WPU at an appropriate activation temperature.     

单组分湿固化聚氨酯胶粘剂

概述了单组分湿固化聚氨酯胶粘剂在预聚体、改性剂及其它助剂等方面的研究现状,并指出了该类胶粘剂将向环保型胶粘剂发展的趋势。