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Method for improving machining thermal stability of chlorinated polyvinyl chloride resin

A chlorinated polyvinyl chloride, resin processing technology, applied in the field of chlorinated polyvinyl chloride resin processing, can solve the problem of affecting the Vicat softening point and heat distortion temperature of the blend, loss of CPVC heat resistance, large amount of stabilizer, etc. Problems, to achieve good static and dynamic thermal stability, to meet the effect of thermal stability needs

Inactive Publication Date: 2007-05-30
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] At present, most of the main stabilizers used in the heat stabilization system of CPVC resin processing use organotin and lead stabilizers, but each stabilizer has its own advantages and disadvantages. The Vicat softening point and heat distortion temperature of the material, that is, the biggest feature of losing CPVC-it has good heat resistance compared with PVC; lead and barium / cadmium stabilizers are used in large amounts and are toxic

Method used

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  • Method for improving machining thermal stability of chlorinated polyvinyl chloride resin

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Effect test

Embodiment 1

[0029] 100 parts of CPVC resin, 2 parts of hydrotalcite and 3.5 parts of lubricant (0.5 part of glyceric fatty acid ester, 0.5 part of paraffin wax, 1.0 part of polyethylene wax and 1.0 part of oxidized polyethylene wax) and 8 parts of impact modifier (methyl methacrylate-styrene-butadiene copolymer), mix in a high-speed mixer, heat up to 125°C, then cool to below 50°C and discharge, test static and dynamic thermal stability, test data see table 1.

Embodiment 2

[0031] 100 parts of CPVC resin, 4 parts of hydrotalcite and 3.5 parts of lubricant (0.5 part of glyceric fatty acid ester, 0.5 part of paraffin wax, 1.0 part of polyethylene wax and 1.0 part of oxidized polyethylene wax) and 8 parts of impact modifier (methyl methacrylate-styrene-butadiene copolymer), mix in a high-speed mixer, heat up to 120-130°C, then cool to below 50°C and discharge, test static and dynamic thermal stability, test data See Table 1.

Embodiment 3

[0033] 100 parts of CPVC resin, 6 parts of hydrotalcite and 3.5 parts of lubricant (0.5 part of glyceric fatty acid ester, 0.5 part of paraffin wax, 1.0 part of polyethylene wax and 1.0 part of oxidized polyethylene wax) and 8 parts of impact modifier (methyl methacrylate-styrene-butadiene copolymer), mix in a high-speed mixer, heat up to 120-130°C, then cool to below 50°C and discharge, test static and dynamic thermal stability, test data See Table 1.

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Abstract

The invention discloses a manufacturing heat stability improving method of chlorinated polychloroethylene resin, which is characterized by the following: adding the composition of 3-5% Ca / Zn composite stabilizer and 2-5% hydrotalcite in the CPVC manufacturing course corresponding to 100% chlorinated polychloroethylene resin; replacing present organic tin system and composite lead salt system; possessing excellent static and dynamic heat stability without toxicity.

Description

technical field [0001] The invention relates to a processing method of chlorinated polyvinyl chloride resin, in particular to a thermally stable method for processing chlorinated polyvinyl chloride pipes, pipe fittings and chlorinated polyvinyl chloride alloy materials. Background technique [0002] Chlorinated polyvinyl chloride resin (CPVC) is the product of further chlorination of polyvinyl chloride (PVC), and is an important engineering plastic for general plastic engineering. Theoretically, the highest chlorine content of CPVC can reach 73.2%, and the chlorine content of CPVC generally produced is 61%-68%. When the chlorine content increases to more than 65%, the tensile strength and bending strength of CPVC rise linearly, and the brittleness also increases. [0003] Since the chlorine content of CPVC is higher than that of PVC, the physical and mechanical properties of CPVC, especially weather resistance, aging resistance, corrosion resistance, high temperature resist...

Claims

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Application Information

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IPC IPC(8): C08L27/24C08K5/524C08K3/26C08K5/09C08L91/06
Inventor 潘祥江袁茂全毛季红张良
Owner SHANGHAI CHLOR ALKALI CHEM
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