| 摘要 |
A two-package air-drying coating system resistant to strong organic solvents, free from toxic heavy metals and excellent, for example, as a primer for adhering urethanes or epoxy enamels to previously painted steel, is based upon certain relatively low-molecular weight hydroxylated methacrylate or acrylate polymers or polyesters polyols and a polyisocyanate crosslinking agent. |
