Flame-retardant CPVC tubular product and preparation method thereof

Abstract

The invention discloses a flame-retardant CPVC tubular product and a preparation method thereof; the flame-retardant CPVC tubular product includes the following components in parts by weight: 90-110 parts of a CPVC powder, 10-20 parts of a polytetrafluoroethylene powder, 5-15 parts of a toughening agent, 6-9 parts of a compound lubricant, 6-10 parts of a stabilizer, 1-5 parts of an AL-PTBBA nucleating agent, 1-3 parts of aluminum hydroxide, 1-3 parts of magnesium hydroxide, 2-6 parts of hydrotalcite, 1-3 parts of active calcium carbonate, 5-10 parts of diisooctyl phenyl phosphite, and 5-10 parts of triisopropyl phosphite. The preparation method of the flame retardant CPVC tubular product includes the steps: S1, weighing the materials; S2, preliminarily mixing to obtain a first mixture; S3,mixing again to obtain a second mixture; and S4, putting the second mixture into a twin-screw extruder, carrying out extrusion molding, and finally obtaining the finished product. The prepared CPVC tubular product has the advantages of slow linear burning rate, excellent flame retardancy and almost no production of burning particles or burning droplets and high tensile strength.

Description

technical field [0001] The invention relates to the field of CPVC pipes, in particular to a flame-retardant CPVC pipe and a preparation method thereof. Background technique [0002] CPVC is a new type of engineering plastic with broad application prospects. CPVC is made by chlorination and modification of PVC (polyvinyl chloride) resin. Corrosive medium can maintain sufficient strength when it does not exceed 100°C, and can be used for a long time under high internal pressure, but the current CPVC pipes are not strong enough in flame retardancy and can only be used in general transportation industries. application is poor. [0003] The Chinese patent with the notification number CN107033507A discloses a CPVC pipe for fire engineering, including the following raw materials in parts by weight: 80-90 parts of CPVC resin, 16-18 parts of ceramic fiber, 7-10 parts of glass fiber, 10-12 parts of magnesium oxide 5-7 parts of calcium oxide, 8-10 parts of calcium carbonate, 2-4 part...

AI Technical Summary

Problems solved by technology

[0004] However, because the CPVC pipe is compounded with a large number of different metal oxides, and the compatibility between the metal oxide and CPVC is not high, when the CPVC pipe is in contact with the flame, the flame will burn the CPVC material in the pipe, resulting in The CPVC is burned out and the metal oxide in the pipe is left, so the CPVC pipe will be perforated and cause the pipe to leak. The flame retardancy of the pipe has not been actually improved and needs to be improved

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