摘要
以二羟甲基丁酸(DMBA)为亲水扩链剂,将羟基封端聚二甲基硅氧烷(HTPDMS)作为改性剂引入水性聚氨酯侧链中,制备了一种兼备耐磨和自消光功能的水性聚氨酯(ARSMWPU),并研究了DMBA和HTPDMS用量对WPU涂层消光效果和耐磨性能的影响。结果表明:随着DMBA用量的增加,WPU乳胶粒径减小,涂层消光性能降低;涂层的耐磨性与HTPDMS用量直接相关,随着HTPDMS用量从0增加至3.0%,涂层表面Si元素含量从0增加到9.26%,表面富集的有机硅链段提高了涂层润滑性,从而降低了涂层的摩擦系数,使自消光水性聚氨酯涂层表现出优异的耐磨性。
A waterborne polyurethane(ARSMWPU)with abrasive resistance and selfmatting properties were prepared using 2,2-dimethylolbutanoic acid(DMBA)as a hydrophilic chain extender and hydroxyalkyl-terminated polydimethylsiloxane(HTPDMS)as a modifier.The influences of DMBA and HTPDMS amounts on abrasive resistance and self-matting properties of the WPU coating were investigated.As the results shown,with the increase of DMBA content,the particle size of WPU emulsion decreased and the self-matting performance of the coating reduced.Meanwhile,the abrasive resistance of the coating was directly associated with the HTPDMS amount.With the increase of HTPDMS content from 0 to 3.0 wt%,the silicon element content on the coating surface was increased from 0 to 9.26%.The silicone chains enriched on the surface improved the coating lubricity and reduced the friction coefficient of the coating.Thus,the waterborne polyurethane coating indicated excellent abrasive resistance and self-matting performance.
作者
李恒
范浩军
林智贤
高金岗
李超
高航
李成祥
Li Heng;Fan Haojun;Lin Zhixian;Gao Jingang;Li Chao;Gao Hang;Li Chengxiang(The Key Laboratory for Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China;Suzhou Ruigao New Materials Co.,Ltd.,Suzhou,Jiangsu 215300,China;Zhejiang Demei Boshida Polymer Materials Co.,Ltd.,Lishui,Zhejiang 323000,China)
出处
《涂料工业》
CAS
CSCD
北大核心
2022年第8期1-8,共8页
Paint & Coatings Industry
基金
国家自然科学基金(22178238)
山东省重点研发(重大科技创新工程)项目(2019JZZY010355)。
关键词
羟基聚硅氧烷
水性聚氨酯
皮革涂层
耐磨性
自消光
hydroxyl polysiloxane
waterborne polyurethanes
leather coating
abrasive resistance
self-matting
