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High-temperature resistant modified CPVC chemical tubing special-purpose material

A technology of copolymerization modification and plastic, applied in the field of modified polymer materials, can solve the problems of narrow processing temperature range, high melt viscosity, low impact strength of products, etc.

Inactive Publication Date: 2012-03-14
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, with the increase of chlorine content, some of its properties are improved, and CPVC has some problems in some aspects, mainly because of its narrow processing temperature range (180°C-190°C), high melt viscosity, and difficult processing and molding. The impact strength is low, so it must be modified

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: first 100 mass parts PVC, 0.5 mass parts dicumyl peroxide, 10 mass parts grafting monomer MMA and 3 mass parts composite stabilizers, 1.5 mass parts lubricants are fully mixed in a high-speed mixer, Then use two rollers to masticate at 185°C for 7 minutes and then release the sheet to obtain the final CPVC graft copolymerized modified plastic.

Embodiment 2

[0012] Embodiment 2: first 100 mass parts PVC, 0.8 mass parts dicumyl peroxide, 10 mass parts grafting monomer MMA and 3 mass parts composite stabilizer, 1.5 mass parts lubricant are fully mixed in high-speed mixer, Then use two rollers to masticate at 185°C for 7 minutes and then release the sheet to obtain the final CPVC graft copolymerized modified plastic.

Embodiment 3

[0013] Embodiment 3: first 100 mass parts PVC, 0.8 mass parts dicumyl peroxide, 10 mass parts grafting monomer MMA and 3 mass parts composite stabilizers, 1.5 mass parts lubricants are fully mixed in a high-speed mixer, Then use two rollers to masticate at 190°C for 7 minutes and then release the sheet to obtain the final CPVC graft copolymerized modified plastic.

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PUM

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Abstract

A preparation method of modified CPVC by graft copolymerization. The invention is characterized in that the modified CPVC material by graft copolymerization makes up and improves the defect that raw material processing property is reduced with the heat resistance of the material, maintains high heat resistance and high strength of CPVC, and has workable characteristic of general PVC materials. The invention can be used to prepare special-purpose CPVC resin of pipelines for transporting corrosive and high-temperature medium.

Description

technical field [0001] The invention relates to the technical field of modified polymer materials, in particular to a special material for chlorinated polyvinyl chloride saline-alkali chemical pipelines resistant to high temperatures above 105°C. Background technique [0002] Salt-alkali industry chemical pipeline is an important part of the pipeline industry. Due to the special purpose of this type of pipeline, the transmission medium is corrosive, and the use environment needs to be carried out under high temperature and high pressure, so higher requirements are put forward for the material and product performance of the chemical pipeline in the saline-alkali industry. Most of the traditional pipes are stainless steel metal pipes. However, many years of practice have proved that this kind of metal pipes are not resistant to corrosion and are prone to "running, popping, dripping, leaking" and other phenomena. Especially for salt and alkali chemical enterprises, since pipel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08F259/04
Inventor 揣成智
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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