Environment-friendly CPVC (Chlorinated Polyvinyl Chloride) composition with high heat stability

Abstract

The invention discloses an environment-friendly CPVC(Chlorinated Polyvinyl Chloride)composition with high heat stability, belongs to the technical field of plastic processing, and particularly relates to an environment-friendly CPVC composition with high heat stability. The CPVC composition is characterized in that zinc stannate with a hollow molecular sieve structure and a traditional calcium zinc stabilizing agent are used in a united manner as a composite stabilizer. The CPVC composition comprises the following components in parts by weight: 100 parts of a chlorinated polyvinyl chloride resin, wherein the percentage by mass of the chlorinity of the chlorinated polyvinyl chloride resin is 65-68%, 3.0-5.0 parts of a calcium zinc heat stabilizer, 1.0-3.0 parts of the zinc stannate with the hollow molecular sieve structure, 5.0-10.0 parts of an impact modifier, 5.0 parts of a processed flow modified agent, 0.5-1.0 part of an internal lubricating agent, 1.0-1.5 parts of an external lubricating agent, 15 parts of calcium carbonate, and 2.0 parts of titanium dioxide. According to the invention, the initial coloring of products is better restrained, the products can be kept to have higher vicat softening temperature, and the products are environment-friendly and zero-toxic. The size stability of the CPVC composition is good when being heated, and the thermal deformation is small.

Description

technical field [0001] An environment-friendly high thermal stability CPVC composition belongs to the technical field of plastic processing, and in particular relates to an environment-friendly high thermal stability CPVC composition. Background technique [0002] CPVC resin has high chlorine content, high strength, high Vicat softening temperature, acid and alkali corrosion resistance, etc., so that it can be used in hot water transportation, chemical hot acid and alkali transportation and other fields. The thermal stability of CPVC resin is worse than that of PVC resin. The resin itself has a high viscosity and is easier to dechlorinate and decompose. The type and amount of stabilizer used in PVC resin processing are difficult to meet the processing requirements of CPVC resin. This requires the type and amount of stabilizer used to provide sufficient thermal stability to maintain continuous processing of CPVC. [0003] CN 101880429A discloses a high-toughness, heat-resist...

AI Technical Summary

Problems solved by technology

The stabilization efficiency of organotin stabilizers is very high. Properly increasing the amount of organotin stabilizers

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