皮革用环保型聚氨酯发泡涂层的制备与性能  

Preparation and Performance of Environmentally Friendly Polyurethane Foam Coatings for Leather

作　　者：于国军 赵昭 韩振斌 YU Guojun;ZHAO Zhao;HAN Zhenbin(Jinchang Nickel-Capital Mine Industrial Co,Ltd.,Jinchang 737100,China;Jinchuan Group Copper Co.,Ltd,Jinchang 737100.China)

机构地区：[1]金昌镍都矿山实业有限公司,甘肃金昌737100 [2]金川集团铜业有限公司,甘肃金昌737100

出　　处：《纺织科技进展》2023年第5期9-13,共5页Progress in Textile Science & Technology

摘　　要：以聚酯二醇(PEG-2000)和异佛尔酮二异氰酸酯(IPDI)为主要原料,2,2-二羟甲基丙酸(DMPA)为亲水扩链剂,1,4丁二醇(BDO)为小分子扩链剂,三乙胺(TEA)为中和剂,水合肼(H6N2O)为后扩链剂,采用预聚体分散法合成耐水解聚酯WPU乳液。以硬脂酸铵为外乳化剂,对制备的乳液进行发泡处理,合成了固含量为50%的无溶剂环保型水性聚氨酯发泡涂层。探究反应指数(R,-NCO/-OH)、硬脂酸铵用量对WPU乳液和膜各项性能的影响,结果表明:当R值为1.7,硬脂酸铵用量为3%时,制备的涂层粒径较小、透气性佳,综合性能优良,满足工业化生产的质量要求。With polyester diol(PEG-2000)and isophorone disocyanate(IPDI) as the main raw materials,2,2-dihydroxymethylpropionic acid(DMPA)as the hydrophilic chain extender,1,4-butanediol(BDO)as the small molecule chain extender,triethy-amine(TEA)as the neutralizer,hydrazine bhydrate(H6N2O)as the post chain extender,Hydrolysis resistant polyester WPU emulsion was synthesized by prepolymer dispersion method.Using ammonium stearate as external emulsifier,the emulsion was foamed and a solvent-free environment friendly waterborne polyurethane foam coating with solid content of 50%was prepared.The effects of the reaction index(R,-NCO/-OH)and the amount of ammonium stearate on the properties of WPU emulsion and film were investigated.The results showed that when R value was 1.7 and the amount of ammonium stearate was 3%,the coating had smaller particle size,better air permeability and excellent comprehensive performance,which can meet the quality requirements of industrial production.

关 键 词：水性聚氨酯 环保型 发泡涂层 耐水解 透气性 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]