羟基氢化松香衍生物改性氟碳涂料的制备及性能研究

Preparation and Properties of Fluorocarbon Coatings Modified by Hydroxyl Hydrogenated Rosin Derivative

为改善氟碳涂料硬度低、附着力差等问题,拓宽其在海洋防腐领域的进一步应用,以可再生资源氢化松香为原料,与环氧氯丙烷反应合成了羟基氢化松香衍生物,通过酸值、羟值测定,GC-MS、FT-IR等方法对其结构进行表征;并用其对氟碳涂料进行改性,探讨了羟基氢化松香衍生物添加量对改性氟碳涂料性能的影响。研究结果表明:羟基氢化松香衍生物为3-氢化松香酰氧-2-羟丙基氯以及3-氢化松香酰氧-1,2-二羟基丙二醇的混合物,其酸值为4.7 mg/g,羟值为243.1 mg/g。随着羟基氢化松香衍生物添加量的增加,改性氟碳涂料表干时间增加,硬度及附着力增大,弯曲及抗冲击性能符合标准要求,耐酸性与耐碱性较好(在酸、碱溶液中浸泡10 d无异常);其中羟基氢化松香衍生物添加量为15%时,涂膜的综合性能较优,表干时间为5.8 min,硬度为4H,涂膜附着力为15.5 MPa,2 mm轴弯曲合格,50 cm冲击合格。

To improve the low hardness and poor adhesion of fluorocarbon coatings,and expand their further application in the marine antifouling field,hydroxyl hydrogenated rosin derivative was synthesized by reacting renewable resource hydrogenated rosin with epichlorohydrin.The structure of the derivative was characterized using acid value,hydroxyl value determination,as well as GC-MS and FT-IR techniques.The obtained product was used to modify fluorocarbon coatings,and the influence for the addition amount of hydroxyl hydrogenated rosin derivative on the performance of the modified fluorocarbon coatings was studied.The results showed that hydroxyl hydrogenated rosin derivative was a mixture of 3-hydrogenated rosin acyloxy-2-hydroxypropyl chloride and 3-hydrogenated rosin acyloxy-1,2-dihydroxy-propane.The acid value of derivative was 4.7 mg/g,and the hydroxyl value was 243.1 mg/g.With the increase of hydroxyl hydrogenated rosin derivative amount,the drying time,the pencil hardness and the adhesion strength of the modified fluorocarbon coatings increased,and the flexibility and impact resistance met the standard requirements.The coatings also exhibit good acid and alkali resistance(no abnormalities was found after it was immersed in acid and alkali solutions for 10 days).When the addition of the hydroxyl hydrogenated rosin derivative was 15%,the comprehensive performance of the coating was optimal,with drying time of 5.8 minutes,pencil hardness of 4H,coating adhesion strength of 15.5 MPa,and qualified results for 2 mm shaft bending and 50 cm impact test.