Preparation and Properties of Two-Component and Double-Crosslinking Waterborne Polyurethane-Acrylic Dispersions

• 作者: Nan Gao Qingzhi Dong Zhuo Zhang
• 来源期刊: 有机高分子材料期刊(英文)
• 学科: 化学
• 关键词: Waterborne Polyurethane-Acrylic DISPERSIONS TWO-COMPONENT Double-Crosslinking
• 年，卷（期）: yjgfzclqkyw,（2）
• 页码范围: 27-33
• 页数: 7页
• 分类号: O6

摘要

In this paper, isophorone diisocyanate (IPDI), polyethylene glycol (PEG), dimethylolpropionic acid (DMPA) and internal crosslinking agent trimethylolpropane (TMP) were used to prepare waterborne polyurethane. And then double-crosslinked polyurethane-acrylic composite aqueous dispersion was prepared in which polyacrylate was adopted to modify waterborne polyurethane and some special external crosslinking agents were added including silicone and trifunctional aziridine. The influence of the amounts of internal and external crosslinking agents, emulsifier, initiator on the particle size, particle size distribution, viscosity, molecular weight, as well as water adsorption ratio were studied.