1980 Volume 37 Issue 7 Pages 457-462
A mixture of 100 parts poly (vinyl chloride) (PVC) (Geon 103 FP), 3 parts magnesia, 2 parts trithiocyanuric acid (TTCA), 1 part stabilizer (RP 101), and 5 parts accelerator, poly (ethylene glycol) with molecular weight of 300, was hot-pressed on a copper plate at 180°C for 20 min to give an adherend with a high peeling strength through the effect of TTCA to couple PVC with the copper surface. By a similar process, a waste soft PVC film used for agricultural greenhouse gave an adherend with a peeling strength of 4.5kgf/cm without the addition of the accelerator. The waste film is degraded by sunlight to yield an activated chloride (allylic chloride), which works as an accelerator. The peeling strength of the adherend increased by the addition of an oil absorptive filler; the peeling strengths of 9.5, 9.7, and 11.4kgf/cm were obtained with carbon black, aluminum silicate, and colloidal silica, respectively. The formulation using magnesia, TTCA, stabilizer (RP 101), and carbon black (Asahi 70H) in the proportion of 3: 2: 1: 10 phr was also useful for binding PVC with brass, aluminum brass, cupro nickel, bronze, and oxidized mild steel.
