| 摘要 |
Plasticized polyvinyl or polyvinylidene chloride compositions are prepared by mixing an aqueous emulsion or dispersion, a dispersion in an organic solvent, or finely-powdered polyvinyl or polyvinylidene chloride, or a copolymer of vinyl chloride and an olefinic monomer, with an organic solvent solution of chlorinated or sulphochlorinated polyethylene, polypropylene, or copolymer of ethylene and propylene, and removing the solvent and water from the mixture. A solution of the polyolefine may be added to an aqueous emulsion of the polyvinyl chloride or vice versa, or alternatively finelypowdered polyvinyl chloride may be added to the polyolefine solution. Polyethylene prepared by the high or low-pressure processes may be used with solvents such as methylene chloride, chloroform, carbon tetrachloride, tetrachlorethane, benzene or toluene or mixtures thereof, with or without anion or cation emulsifiers. The mixtures may be freed of solvent by coagulating with, for example, calcium on lead chloride, by atomizing with steam or inert gas under reduced pressure, or by stirring with hot water. Other plasticizers and dyestuffs may be included in the composition. |
