有机硅改性水性聚酯的制备与性能  

Preparation and properties of silicone-modified waterborne polyester resin

作　　者：崔建东[1] 李培礼 罗闯[1] 张长川 朱广军[1] CUI Jian-dong;LI Pei-li;LUO Chuang;ZHANG Chang-chuan;ZHU Guang-jun(School of Chemical Engineering, Nanjing University of Science ＆ Technology, Nanjing 210094, China)

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《现代化工》2018年第4期160-164,共5页Modern Chemical Industry

摘　　要：以新戊二醇(NPG)、三羟甲基丙烷(TMP)、间苯二甲酸(IPA)、己二酸(AA)、偏苯三酸酐(TMA)等为主要原料,通过熔融法制备端羟基水性聚酯树脂(HWPR),再以有机硅单体甲基三乙氧基硅烷(MTES)为改性剂,合成有机硅改性水性聚酯树脂(Si-HWPR),并与高甲醚化氨基树脂(HMMM)固化剂配制成有机硅改性水性聚酯烘漆。利用FT-IR、~1H-NMR与XRD、TGA分别对聚合物结构与性能进行表征,研究了不同MTES质量分数对水性聚酯和Si-HWPR涂膜性能的影响。结果表明,随着MTES质量分数的增加,Si-HWPR的黏度逐渐降低,粒径逐渐增大,涂膜的吸水率和拉伸强度逐渐降低,水接触角和断裂伸长率不断增大。当体系中MTES质量分数为10%时,涂膜的综合性能最佳,耐热耐水性能显著提高。Firstly,hydroxyl terminal waterborne polyester resin（ HWPR） is prepared by melting process using neopentyl glcol（ NPG）,trimethylol propane（ TMP）,isophthalic acid（ IPA）,adipic acid（ AA） and trimellitic anhydride（ TMA） as main raw materials,and then reacts with methyl triethoxysilane（ MTES） to obtain silicone-modified waterborne polyester resin（ Si-HWPR）.Finally,silicone modified waterborne polyester baking paint is formed by mixing Si-HWPR with high methylated melamine resin,a curing agent.The structure and properties of polymer are characterized by FTIR,～1HNMR,XRD and TGA.The effects of MTES content on the performance of Si-HWPR and Si-HWPR coating film are studied. The results show that with the increase of MTES content,the viscosity of Si-HWPR decreases,the particle size in dispersion increases,both the water absorption rate and tensile strength of coating film decrease and both the water contact angle and elongation at break of coating film increase. The coating film has the best comprehensive performance and the significantly-improved heat and water resistances when the mass fraction of MTES is 10%.

关 键 词：有机硅 水性 聚酯树脂 烘漆 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]