Chlorinated polyvinyl chloride modified material and preparation method thereof

Abstract

The invention discloses a chlorinated polyvinyl chloride modified material and a preparation method thereof. The chlorinated polyvinyl chloride modified material is prepared from the following components in parts by weight: 100 parts of chlorinated polyvinyl chloride resin, 1-5 parts of compound lubricating agent, 5-10 parts of complex heat stabilizer, 5-15 parts of filling agent, 5-20 parts of toughening agent, 3-10 parts of processing agent and 0.5-3 parts of pigment. The preparation method comprises the following steps of: weighing various components according to a recipe for later use; pouring the chlorinated polyvinyl chloride resin into a high-speed mixer to be mixed, then filling the complex heat stabilizer, adding the compound lubricating agent, the filling agent, the toughening agent, the processing agent and the pigment to mix until the temperature reaches 105 DEG C-120 DEG C, discharging and cooling; and melting and extruding the cooled mixed material, and hot cutting to obtain the chlorinated polyvinyl chloride modified material. Problems of large melt viscosity and difficult formation machining are overcome through chlorinated polyvinyl chloride modification, and the obtained product has high shock strength, good surface smoothness and high thermal stability.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a chlorinated polyvinyl chloride modified material and a preparation method thereof. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) is obtained by chlorinating polyvinyl chloride (PVC). After chlorination modification, the chlorine content of the material is increased from 56.7% to 63% to 68%, which increases the polarity of the molecular bond, the intermolecular force, and the chemical stability of the material, which improves the mechanical properties and durability of the material. Chemical corrosion performance and flame retardant performance have been greatly improved. Moreover, after chlorination modification, the Vicat softening temperature increased from 72°C to 82°C to 90°C to 125°C, which increased the heat resistance of the material by 20% to 40%. Therefore, chlorinated polyvinyl chloride has excellent chemical corr...

AI Technical Summary

Problems solved by technology

[0003] However, with the increase of chlorine content, while some performances are improved, some performances are also lacking: (1) Due to the high melt viscosity of chlorinated polyvinyl chloride materials and the difficulty in processing and molding, the surface finish of its products Poor, and some mechanical properties (such as impact strength) are low

(2) Although the heat resistance of the material has been improved, the thermal stability is not high

Wherein the embodiment 1,2,4 of Chinese patent literature CN102532763A discloses calcium / zinc composite stabilizer and organotin stabilizer according to the weight ratio of 3: 1, 2: 1, 1: 1 composition composite thermal stabilizer more specifically, Although the calcium / zinc composite stabilizer has a certain thermal stabilizing effect on chlorinated polyvinyl chloride materials, the thermal stabilization effect is not very strong. Composite heat stabilizers are not ideal for improving the thermal stability of chlorinated polyvinyl chloride materials, and their thermal stability time at 200°C is only ≥60min