process for einfaerben of plastic powders, polyvinyl chloride, polyvinyl chloride mischpolymerisaten, nachchloriertem polyvinyl chloride and chlorinated polyaethelen with unloeslichen pigments

摘要

Disperse dyeing of vinyl chloride polymer powder Process involves dyeing (co) PVC, post-chlorinated PVC or chlorinated polyethylene with insol. pigments by suspending the powder in water with or without a plastics-swelling agent and strongly stirring while the pigment is added and continuing, opt. at raised temps., till pigmentation is completed after which the dyed powder is separated and dried.