Preparation of Water-Tolerant UV-Curable SixOy(OH)z/PA Aqueous Dispersion Films

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• 作者：Chenting Cai ; Zhihua Xu ; Xiling Niu ; Jinshan Guo ; Zhendong Zhang ; Lunguo Kang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：October 30, 2013
• 年：2013
• 卷：52
• 期：43
• 页码：15124-15130
• 全文大小：386K
• 年卷期：v.52,no.43(October 30, 2013)
• ISSN：1520-5045

文摘

In this experiment, silicon oxide groups (Si_xO_y(OH)_z) and carbon鈥揷arbon double bonds (C鈺怌) were introduced onto the PA molecular chains. In the first step, acrylic resins (PA), grafted by organosilicon groups, were prepared by solution polymerization. In the second step, UV curable Si_xO_y(OH)_z/PA aqueous dispersions, with a high silicon content, were prepared by hydrolyzation and condensation of PA and silane coupling agents (KH-570). Aqueous dispersions possess certain stability when the KH-570 consumption ranges from 0 wt % to 30.0 wt %. With increased content of C鈺怌, the water absorption of UV cured Si_xO_y(OH)_z/PA aqueous dispersion films soaked in the water for 24 h was decreased from 78% to 0%. Furthermore, heat curing further improved the water tolerance of the UV cured aqueous dispersion films. The water absorption change of the films caused by heat curing could reach up to 17%.