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采用醚-碳酸酯共聚物和氨基醇扩链剂合成的具有定制压敏粘附性能的新型水性聚氨酯-脲

New Waterborne Polyurethane-Urea Synthesized with Ether-Carbonate Copolymer and Amino-Alcohol Chain Extenders with Tailored Pressure-Sensitive Adhesion Properties.

作者信息

Fuensanta Mónica, Khoshnood Abbas, Rodríguez-Llansola Francisco, Martín-Martínez José Miguel

机构信息

Adhesion and Adhesive Laboratory, University of Alicante, 03080 Alicante, Spain.

UBE Corporation Europe, Polígono El Serrallo, 12100 Grao Castellón, Spain.

出版信息

Materials (Basel). 2020 Jan 31;13(3):627. doi: 10.3390/ma13030627.

DOI:10.3390/ma13030627
PMID:32023838
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7040638/
Abstract

New waterborne polyurethane-urea dispersions with adequate adhesion and cohesion properties have been synthesized by reacting isophorone diisocyanate, copolymer of ether and carbonate diol polyol and three amino-alcohols with different number of OH groups chain extenders using the prepolymer method. The waterborne polyurethane-urea dispersions were characterized by pH, particle-size distribution, and viscosity, and the polyurethane-urea films were characterized by attenuated total reflectance infrared (ATR-IR) spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and plate-plate rheology (temperature and frequency sweeps). Polyurethane-urea pressure-sensitive adhesives (PUU PSAs) were prepared by placing the waterborne polyurethane dispersions on polyethylene terephthalate (PET) films and they were characterized at 25 °C by creep test, tack and 180° peel test. The waterborne polyurethane-urea dispersions showed mean particle sizes between 51 and 78 nm and viscosities in the range of 58-133 mPa·s. The polyurethane-urea films showed glass transition temperatures (T) lower than -64 °C, and they showed a cross of the storage and loss moduli between -8 and 68 °C depending on the number of OH groups in the amino-alcohol chain extender. Different types of PUU PSAs (removable, high shear) were obtained by changing the number of OH groups in the amino-alcohol chain extender. The tack at 25 °C of the PUU PSAs varied between 488 and 1807 kPa and the 180° peel strength values ranged between 0.4 and 6.4 N/cm, and their holding times were between 2 min and 5 days. The new PUU PSAs made with amino-alcohol chain extender seemed very promising for designing environmentally friendly waterborne PSAs with high tack and improved cohesion and adhesion property.

摘要

通过采用预聚物法，使异佛尔酮二异氰酸酯、醚与碳酸酯二元醇的共聚物以及三种带有不同数量羟基的氨基醇作为扩链剂进行反应，合成了具有足够粘附力和内聚力的新型水性聚氨酯 - 脲分散体。通过pH值、粒度分布和粘度对水性聚氨酯 - 脲分散体进行表征，并用衰减全反射红外光谱（ATR - IR）、差示扫描量热法（DSC）、热重分析（TGA）和平板流变仪（温度和频率扫描）对聚氨酯 - 脲薄膜进行表征。将水性聚氨酯分散体置于聚对苯二甲酸乙二酯（PET）薄膜上制备聚氨酯 - 脲压敏胶粘剂（PUU PSA），并在25℃下通过蠕变试验、粘性和180°剥离试验对其进行表征。水性聚氨酯 - 脲分散体的平均粒径在51至78nm之间，粘度在58 - 133mPa·s范围内。聚氨酯 - 脲薄膜的玻璃化转变温度（T）低于 - 64℃，并且根据氨基醇扩链剂中羟基的数量，其储能模量和损耗模量在 - 8至68℃之间出现交叉。通过改变氨基醇扩链剂中羟基的数量，获得了不同类型的PUU PSA（可移除型、高剪切型）。PUU PSA在25℃下的粘性在488至1807kPa之间变化，180°剥离强度值在0.4至6.4N/cm之间，其保持时间在2分钟至5天之间。用氨基醇扩链剂制成的新型PUU PSA对于设计具有高粘性以及改善内聚力和粘附性能的环保型水性PSA似乎非常有前景。

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