含硅可水分散多异氰酸酯的制备及性能研究  

Preparation and Properties of Silicon-containing Water-dispersible Polyisocyanates

作　　者：刘中生 曹德榕[1] 杨鹏博 李会宁 LIU Zhongsheng;CAO Derong;YANG Pengbo;LI Huining(School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510641,Guangdong,China;Zhaoqing Rivers New Material Technology Co Ltd,Zhaoqing 526000,Guangdong,China)

机构地区：[1]华南理工大学化学与化工学院,广东广州510641 [2]肇庆千江高新材料科技股份公司,广东肇庆526000

出　　处：《聚氨酯工业》2021年第3期23-26,共4页Polyurethane Industry

基　　金：2019年广州市科技计划项目(201902010063)。

摘　　要：将自制含亚氨基的硅烷偶联剂与六亚甲基二异氰酸酯(HDI)三聚体反应,再与1,3-丙烷磺酸内酯反应使其具有亲水性,最终得到一系列含硅烷和磺酸基的多异氰酸酯固化剂,并采用FT-IR和1H-NMR对改性硅烷偶联剂进行了表征分析。研究结果表明,当改性硅烷偶联剂质量分数为3.0%~4.0%且1,3-丙烷磺酸内酯质量分数为3%时,制备的固化剂固含量约为98%,NCO质量分数在20%~21%范围,其透明性和贮存稳定性好,可良好地分散于水中。将它用作水性羟基聚丙烯酸酯树脂的固化剂,涂膜硬度可达2H,耐水性和耐热性好。A polyisocyanate intermediate was synthesized by hexamethylene diisocyanate(HDI)trimer and self-made imino-containing silane coupling agent,and then it reacted with 1,3-propane sulfone to get hydrophilic.A series of silane and sulfonic-containing polyisocyanate curing agents were obtained,and the modified silane coupling agent was characterized and analyzed by FT-IR and 1H-NMR.The results showed that,when the mass fractions of the modified silane coupling agent was 3.0%to 4.0%and 1,3-propane sulfone was 3%,the solid content of the prepared curing agents was about 98%,and the mass fraction of NCO was 20%~21%.The transparency and storage stability of the curing agents were good and could be dispersed in water well.Used as a curing agent for water-based hydroxy polyacrylate resin,the coating films exhibited high hardness(2H),good water resistance and heat-resistence.

关 键 词：硅烷偶联剂 可水分散多异氰酸酯 亲水改性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]