What is Chlorinated polyvinyl chloride

Chlorinated polyvinyl chloride (CPVC) is a product of further chlorination modification of polyvinyl chloride (PVC). Its chlorine content is generally 65%~72% (volume fraction). In addition to many excellent properties of PVC, CPVC has a greater improvement in corrosion resistance, heat resistance, solubility, flame retardancy and mechanical strength than PVC. Therefore, CPVC is a new material with excellent performance and is widely used in construction, chemical industry, metallurgy, shipbuilding, electricity, textile and other fields, with a broad application prospect.


Chlorinated polyvinyl chloride is a new type of engineering plastics, which is prepared by chlorination of polyvinyl chloride (PVC) resin. The product is white or light yellow odorless, odorless, non-toxic loose particles or powder. After chlorination, the irregularity and polarity of the molecular chain arrangement of PVC resin increase, which increases the solubility and chemical stability of the resin, thus improving the heat resistance of the material and the corrosion resistance of acid, alkali, salt and oxidant. The mechanical properties of the heat deformation temperature of the resin are improved, the chlorine content is increased from 56.7% to 63-69%, the Vicat softening temperature is increased from 72-82 ℃ to 90-125 ℃, the maximum service temperature is 110 ℃, and the long-term service temperature is 95 ℃. Therefore, CPVC is a new engineering plastic with broad application prospects.

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