Chlorinated polyvinyl chloride (PVC) is a new type of engineering plastic produced by chlorination modification of polyvinyl chloride (PVC) resin. Commonly known as perchloroethylene, abbreviated as CPVC, this product is a white or light yellow, odorless, non-toxic loose particle or powder. After chlorination, the irregularity and polarity of the molecular chain arrangement of PVC resin increase, leading to an increase in the solubility and chemical stability of the resin, thereby improving the material's heat resistance and corrosion resistance to acids, alkalis, salts, oxidants, etc. Improved the mechanical properties of the resin's thermal deformation temperature. Therefore, CPVC is a new type of engineering plastic with broad application prospects. Polymer compounds are obtained by chlorinating polyvinyl chloride. According to the degree of polymerization, high viscosity, medium viscosity, and low viscosity types can be produced. High viscosity type has good resistance to counterfeiting, chemical corrosion, and elasticity. Low viscosity type is more soluble in vegetable oils. Powdered polyvinyl chloride is prepared by swelling with an appropriate solvent and conducting aqueous suspension chlorination at temperatures below 50 ℃. According to the degree of polymerization, it can be made into high viscosity, medium viscosity, and low viscosity types. High viscosity type has good resistance to counterfeiting, chemical corrosion, and elasticity. Low viscosity type is more soluble in vegetable oils. Used for producing corrosion-resistant paints, adhesives, and synthetic fibers.