Cationic CO_(2)-based Waterborne Polyurethane with High Solid Content and Excellent Ageing Resistance

作     者：Hong-Ming Zhang Guang-Ping Han Wan-Li Cheng Shun-Jie Liu Xian-Hong Wang Hong-Ming Zhang;Guang-Ping Han;Wan-Li Cheng;Shun-Jie Liu;Xian-Hong Wang

作者机构：Key Laboratory of Bio-based Material Science and Technology(Ministry of Education)Northeast Forestry UniversityHarbin 150040China Key Laboratory of Polymer EcomaterialChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 13022China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2022年第40卷第10期

页      面：1183-1192,I0008页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Natural Science Foundation of China(No.32071686) 

主　　题：Cationic waterborne polyurethane CO_(2)-polyol High solid content Hydrolysis/oxidation resistance 

摘      要：High solid content CO_(2)-based cationic waterborne polyurethanes(CWPUs)were prepared using CO_(2)-polyols as soft segment and Nmethyl diethanolamine(MDEA)as hydrophilic *** resulting stable aqueous dispersion displayed a high solid content of 52%with a low MDEA loading of 3.52 wt%.This novel structural CWPU can provide excellent adhesive strength,whose T-peel strength could reach 173.48N/5cm,20%higher than that of ester-based cationic waterborne polyurethane(87.55 N/5cm).The CO_(2)-based CWPU film showed only 2 wt%swelling percentage after 240 min immersion in water,and no change was observed during its immersion in 5 wt%sodium hydroxide *** tensile strength of CO_(2)-WPUs dropped slowly to 91.2%after 480 min immersion in a 5 wt%sodium hydroxide solution,whereas that of esterbased CWPUs dropped quickly to 32%after 240 min and their mechanical properties were lost after 360 min ***,the retention of the tensile strength of the CO_(2)-CWPUs was 81.5%even after 720 min immersion in 10 wt%H_(2)O_(2) solution,while it was only ca.38%for the ester-based *** results indicated that the cationic CO_(2)-based CWPU may be promising waterborne adhesive with outstanding ageing resistance due to its synergistic effect from carbonate and ether groups of CO_(2)-polyol structure.