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Chlorinated polyvinyl chloride composition and pipe preparation method

A technology of chlorinated polyvinyl chloride and composition, which is applied in the field of polymers, can solve problems such as increasing processing difficulty, and achieve the effects of avoiding adverse effects, easy processing, and improving heat resistance

Active Publication Date: 2018-10-16
CHINA PETROLEUM & CHEM CORP
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

These two methods improve the heat resistance of CPVC pipes, but also increase the difficulty of processing

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] The core layer butadiene-styrene polymer of impact modifier MBS in embodiment 1, wherein butadiene content is 12.5%, and the mass ratio of shell layer methyl methacrylate and butyl methacrylate is 2: 3; the core layer butadiene-styrene polymer of impact modifier MBS in embodiment 2,3, wherein butadiene content is 12%, the quality of shell methyl methacrylate and butyl methacrylate Ratio is 1.7:3.3; The core layer butadiene-styrene polymer of impact modifier MBS in embodiment 4,5, wherein butadiene content is 13.5%, and shell layer methyl methacrylate and methacrylic acid The mass ratio of butyl ester is 2.3:2.7.

[0031] 56%~63% high melting point hindered phenol antioxidant

[0032] Composite antioxidant system hindered phenol antioxidant 330 accounts for 60% in embodiment 1, phosphite antioxidant PEP-36A accounts for 40%, composite antioxidant system hindered phenol antioxidant 330 accounts for 40% in embodiment 2,3 56%, phosphite antioxidant PEP-36A accounts for 44...

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PUM

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Abstract

The invention relates to a chlorinated polyvinyl chloride composition and a pipe preparation method, and belongs to the field of polymers. The chlorinated polyvinyl chloride composition is characterized by comprising the following components in parts by weight: 100 parts of chlorinated polyvinyl chloride (CPVC) resin, 1.5-2.0 parts of a stabilizer, 5-6 parts of an impact modifier, 2-3 parts of a processing aid, 1.5-2.0 parts of a lubricant, 1.5-2.0 parts of an antioxidant, 1.9-2.3 parts of a colorant and 1-5 parts of filler, wherein the CPVC resin is obtained by chlorination modification of mass PVC resin, the impact modifier is methyl methacrylate-butadiene-styrene (MBS) resin with a specific composition, and the antioxidant is a complex antioxidant system of a high-melting-point hinderedphenol antioxidant and a phosphite antioxidant. The preparation method comprises the following steps: mixing the materials at a low speed at the temperature of 100-120 DEG C, and extruding the granules to obtain a pipe. According to the composition provided by the invention, the stability and the heat resistance of the material is improved, so that the prepared chlorinated polyvinyl chloride pipehas good heat resistance and thermal stability, and is easy to process and form.

Description

technical field [0001] The invention discloses a chlorinated polyvinyl chloride composition and a method for preparing a pipe, belonging to the field of macromolecules. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) is the product of polyvinyl chloride (PVC) after chlorination, the mass fraction of chlorine elements is about 65%-71%, its physical properties, mechanical properties, especially heat resistance, solvent resistance , flame retardancy, etc. are all greatly improved compared with PVC, and the Vicat softening temperature is 30°C-40°C higher than PVC. CPVC is widely used in the manufacture of various pipes, plates, profiles, injection molded parts, foam materials, anti-corrosion coatings, etc., and has a large market prospect. [0003] Due to the increase of chlorine content, the molecular defect structure of CPVC increases, the thermal stability becomes worse, and the intermolecular interaction force increases at the same time, the melt viscosi...

Claims

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Application Information

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IPC IPC(8): C08L27/24C08L51/04C08K13/06C08K9/06C08K3/26C08K5/13C08K5/527C08K5/57
CPCC08K2003/265C08K2201/011C08L27/24C08L2201/08C08L2203/18C08L2205/02C08L2205/035C08L51/04C08K13/06C08K9/06C08K3/26C08K5/13C08K5/527C08K5/57
Inventor 贾小波裴小静肖恩琳张新华张学明王晶王秀丽
Owner CHINA PETROLEUM & CHEM CORP
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