A new curing agent for self-curable system of aqueous-based PU dispersion

被引：51

作者：

Wang, Shih-Chieh

Chen, Po-Cheng

Yeh, Jen-Taut

Chen, Kan-Nan ^{[1
]}

机构：

[1] Tamkang Univ, Nanotech Res Ctr, Dept Chem, Tamsui 251, Taiwan

[2] Hubei Univ, Fac Chem & Mat Sci, Wuhan, Peoples R China

来源：

REACTIVE & FUNCTIONAL POLYMERS | 2007年 / 67卷 / 04期

关键词：

azetidine; self-curing; ring-opening; aqueous-based PU; POLYURETHANE DISPERSION; SINGLE-PACK; COPOLYMERIZATION;

D O I：

10.1016/j.reactfunctpolym.2007.01.002

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Anionic aqueous-based polyurethane (PU) dispersion consists of carboxyl group that served as an internal emulsifier stabilizing aqueous PU dispersion and also a reactive site toward curing agent. A model reaction of a mono-azetidine-containing compound and trimethylacetic acid (TMAA) demonstrated that an amino ester bond formation between azetidine and carboxylic acid. A di-azetidine containing compound (HDDA-AZT) was prepared and served as a curing agent, which was synthesized by a Michael addition reaction of azetidine (AZT) to hexanediol diacrylate (HDDA). Anionic aqueous PU dispersion was treated with HDDA-AZT as a latent curing agent and becoming a self-curable aqueous PU system. A cross-linked PU resin was obtained from this self-curing PU system on drying at ambient temperature. The performance properties of these self-cured PU resins proved that cross-linking behaviors with this new curing agent, HDDA-AZT. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：299 / 311

页数：13

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