Abstract: The hardness，gloss and water resistance of waterborne alkyd coating are poorer than those of oilborne alkyd coating，and improving these properties is of great significance for the promotion and application of waterborne alkyd coating. In this study，soybean oil，pentaerythritol and phthalic anhydride were used to synthesize alkyd prepolymers by alcoholysis，and isophorone diisocyanate（IPDI）was introduced to prepare IPDI-modified waterborne alkyd emulsion by phase inversion. The effects of IPDI and neutralizer AMP-95 dosages，and emulsification process on the properties of waterborne alkyd emulsion were studied. The results showed that when the amount of IPDI，AMP-95 and emulsifier was 50%， 0.6% and 5%，respectively，and the stirring speed was 4 000 r/min，the obtained waterborne alkyd film showed the better comprehensive performance with hardness of 2H，gloss of 90. 87， surface dry time of 2 h，and water resistance for 24 hours. 

Key words: IPDI modification, alkyd resin, phase inversion method, neutralizer

摘要： 水性醇酸涂料漆膜的硬度、光泽与耐水性较油性醇酸涂料差，改进这些性能对水性醇酸涂料的推广应用有重要意义。本研究以大豆油、季戊四醇及苯酐为原料，采用醇解法合成醇酸预聚体，并引入异佛尔酮二异氰酸酯（ IPDI）改性，通过相反转法制成 IPDI改性水性醇酸乳液。研究了 IPDI用量、中和剂 AMP-95用量、乳化工艺对水性醇酸乳液性能的影响。结果表明：当 IPDI用量（以苯酐的质量计）为 50%，AMP-95用量（以树脂的质量计）为 0. 6%，乳化剂用量（以树脂的质量计）为 5%，搅拌速度为 4 000 r/min时，所制得的水性醇酸乳液漆膜硬度达 2H，光泽为 90. 87，表干 2h，耐水性 24 h无异常，漆膜综合性能表现良好。

关键词: IPDI改性, 醇酸树脂, 相反转法, 中和剂

CLC Number: 

• TQ637. 81