Equations of three dimension solubility parameter of alkyd resin calculated from its oillength are derived. The calculated results are close to the practical value.
进而整理出一组随油度改变的醇酸树脂的三维溶度参数的方程序，推算结果与实际相符。
2
With the increase of oillength, water absorption of the film reduces, while electrical strength increases, but water-dispersible was bad, the ideal oillength was 37%;
The influence of the oillength of alkyd resin, the mass ratio of alkyd resin to petroleum resin, the types of solvents, prepare process and et al to the performances of the product is investigated.