双组分聚氨酯涂料用改性醇酸树脂的研究

采用不同改性的短油度醇酸树脂作甲组分,异氰酸酯预聚物作乙组分,配制双组分聚氨酯涂料,探讨甲组分对双组分聚氨酯涂料性能的影响。结果表明,椰子油改性短油度醇酸树脂,颜色水白、耐黄变性能和丰满度好,可以作为高档的亮光清面漆、耐黄变的面漆用树脂;蓖麻油改性短油度醇酸树脂,颜色较深、丰满度较好、干燥速度慢及柔韧性好,可以作为普通的亮光面漆用树脂;豆油改性短油度醇酸树脂,干燥速度较快,应用于底漆和哑光面漆;合成脂肪酸改性短油度醇酸树脂,颜色水白、流平好、干燥速度慢、丰满度高及硬度高,可以作为高档的亮光面漆用树脂。

Research of Modified Alkyd Resin for Two-Component Polyurethane Coatings

The two-component polyurethane coatings were compounded with modified short oil alkyd resin as A component and isocyanate prepolymers as B component. The effect of A component on two-component polyurethane coatings were investigated. The results showed that coconut oil modification short oil alkyd resin could be used as gloss paint, yellowing resistance finish for its pure white color, yellowing resistance properties and good fullness. Castor oil modification short oil alkyd resin could be used as ordinary finish painted resin for its deep color, good fullness, lower drying rate and excellent flexility. Soybean oil modification short oil alkyd resin could be used as primer and matte paint for its fast drying rate. Synthetic fatty acid modification short oil alkyd resin could be used as high-grade finish painted resin for the pure while color, good level ability, slow-speeded drying, nice fullness and high hardness.