摘要
以甲苯为溶剂,以过氧化苯甲酰(BPO)引发由苯乙烯(St)、甲基丙烯酸酯类(包括MMA、BMA、IBMA和IBOMA)、含氟甲基丙烯酸酯类(包括甲基丙烯酸三氟乙酯(3F)、甲基丙烯酸六氟丁酯(6F)和甲基丙烯酸十二氟庚酯(12F))和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)组成的反应体系,在80-85℃下,分别采用一步加料法和分步加料法工艺,合成了含氟涂料清漆。聚合物的IR图表明,在744-748cm-1间出现了C-F的特征谱带,在1000-1100cm-1间出现了Si-O键吸收峰。讨论了合成工艺、不同的共聚单体对漆膜的水接触角、表面性能和吸水性的影响。结果表明:分步加料法为最佳工艺;IBMA和IBOMA为甲基丙烯酸酯类单体中的优选共聚单体;含氟单体中,随着含氟量的增加,水接触角增大;以粘度为3000cs的羟基硅油为改性剂,可以提高漆膜的水接触角和硬度,其耐蚀性(包括耐水性、耐盐水性、耐碱性、耐洗刷性和耐污染性等)良好。
The reaction system consisting of styrene （ St）, metacrylic acid esters （including MMA, BMA, IBMA and IBOMA） , metacrylic acid esters containing fluorine （including Trifluoro-ethyl methacrylate （ 3 F ） , hexafluoro-butyl methacrylate （6F） and dodecafluoro-heptyl methacrylate （12F） ） and γ-propyl methacryloxy trimethoxy silane （KH570） was initiated by BPO （benzoyl peroxide） in the solvent of toluene. And the coating varnish containing fluorine was synthesized with technics of adding raw materials in one step and in two steps respectively at a temperature of 80 -85℃. IR spectra shows that the C-F characteristic spectra line of polymer exist in range of 744 -748 cm^-1, and the absorption peak of Si-O exist in range of 1 000 - 1 100 cm^-1 Influences of synthesis technics and different comonomers on water contact angle, surface performance and water absorption of lacquer film were discussed. Results show that adding raw materials in two steps is the optimal technics. IBMA and IBOMA are the best comonomers for metacrylic acid esters. Among monomer containing fluorine, the water contact angle was increased with increasing fluorine amount. Water cantact angle and hardness of lacquer film were improved with hydroxyl silicon oil having a viscosity of 3 000 cs as modified agent. And its corrosion resistance （including water resistance, salt water resistance, base resistance, washing resistance and contamination resistance） is good.
出处
《电镀与涂饰》
CAS
CSCD
2005年第10期24-27,共4页
Electroplating & Finishing
关键词
含氟硅涂料
共聚物
甲基丙烯酸酯
水接触角
吸水率
coating containing fluorine and silicon
copolymer
metacrylic acid ester
water contact angle
waterabsorption
