环氧树脂蓖麻油双重改性水性聚氨酯皮革涂饰剂的合成与性能  

Synthesis and Properties of Waterborne Polyurethane Modified with Epoxy Resin and Castor Oil for Leather Finishing

作　　者：李海涛[1,2] 廖兵[1] 李朋娟[1,2] 戴永强[1,2] 庞浩[1] 

机构地区：[1]中国科学院广州化学研究所中国科学院纤维素化学重点实验室,广东广州510650 [2]中国科学院大学,北京100049

出　　处：《精细化工》2015年第5期565-570,共6页Fine Chemicals

基　　金：佛山市精细高分子及复合材料创新平台(2011A091000007)~~

摘　　要：以聚氧化丙烯二醇(PPG)和异佛尔酮二异氰酸酯(IPDI)为原料,蓖麻油(CO)和环氧树脂(E-44)为交联剂,采用预聚体分散法合成了一系列用于皮革涂饰的环氧树脂蓖麻油双重改性水性聚氨酯(ECOWPU)。采用FTIR、TEM、DSC、TGA对聚合物结构及膜的性能进行了分析。FTIR表明聚合物中引入了蓖麻油和环氧树脂,羟基和环氧基均参与反应。通过TEM可观察乳液颗粒呈球形,粒径较为均匀。DSC表明,改性后胶膜的微相分离程度增大。TGA表明,环氧树脂和蓖麻油的加入提高了聚氨酯的热稳定性。蓖麻油、E-44含量的增加,均使胶膜拉伸强度逐渐增大,断裂伸长率、吸水率降低。当蓖麻油添加量为4.9%,E-44添加量为7%时,胶膜的综合性能最佳。A series of stable waterborne polyurethane for leather finishing modified with epoxy resin and castor oil （ECOWPU） were prepared by the prepolymer process using polypropylene glycol （PPG） and isophorone diisoeyanate（IPDI） as raw materials, castor oil （ CO ） and epoxy resin （ E - 44 ） as the coupling agent. The structure of the polymer and the properties of the resulting films were analyzed by PTIR, TEM, DSC and TGA. FTIR shows that the castor oil and epoxy resin were chemically incorporated into the copolymer. Both hydroxyl groups and epoxy groups of epoxy resin participated in the reaction. TEM shows that the particle morphology was spherical, and the particle size was relatively uniform. DSC indicates that the degree of micro-phase separation in the modified films increased. TGA reveals that the thermal properties were better when the castor oil and epoxy resin were incorporated. With the increase of the content of castor oil and E -44, the tensile strength increased asymptotically, and the elongation at break and the water absorption decreased. The comprehensive properties of the cast film can be best when the content of castor oil and E -44 are 4.9% and 7% ,respectively.

关 键 词：水性聚氨酯 蓖麻油 环氧树脂 皮革涂饰剂 

分 类 号：TS529.5[轻工技术与工程—皮革化学与工程]