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Composition for preparing ultrahigh-Vicat CPVC (chlorinated polyvinyl chloride) pipe

A CPVC pipe and composition technology, applied in the field of chlorinated polyvinyl chloride pipe material formulation, to achieve the effect of reducing cost and improving Vicat softening point

Inactive Publication Date: 2018-01-16
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application of CPVC, some customers still require a higher Vicat formulation to adapt to more stringent conditions of use

Method used

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  • Composition for preparing ultrahigh-Vicat CPVC (chlorinated polyvinyl chloride) pipe
  • Composition for preparing ultrahigh-Vicat CPVC (chlorinated polyvinyl chloride) pipe
  • Composition for preparing ultrahigh-Vicat CPVC (chlorinated polyvinyl chloride) pipe

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Experimental program
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Effect test

Embodiment 1～8

[0021] The proportioning ratio of each component is shown in the table below, wherein, the consumption of each component is parts by weight

[0022]

[0023] The impact modifier is MBS. The chemical name is methyl methacrylate, butadiene, and styrene terpolymer, and the finished product with the brand name 564 of Zhongyuan Company in Japan is used;

[0024] The filler uses talcum powder whose surface has been modified and the pH value is 8-9. The preparation method:

[0025] Store the talc powder in an alkaline buffer solution for 2-4 days, and then dry it at 75-85°C to obtain the surface-modified talc powder with a pH value of 8-10;

[0026] Described alkaline buffer solution is selected from disodium hydrogen phosphate, sodium phthalate mutual coordination system;

[0027] Perform performance tests on extruded pipes. The specific test methods and performance all refer to the national standard GB / T18998.2-2003. Among them, the Vicat softening point test method in this ...

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Abstract

The invention discloses composition for preparing an ultrahigh-Vicat CPVC (chlorinated polyvinyl chloride) pipe. The composition is prepared from components in parts by weight as follows: 100 parts ofCPVC, 0.5-1.5 parts of a heat stabilizer, 2-5 parts of an auxiliary stabilizer, 1-3 parts of a lubricant, 4-10 parts of an impact modifier, 10-30 parts of filler and 5-10 parts of titanium dioxide. According to the formula of the ultrahigh-Vicat CPVC pipe, high-melting-point external lubrication is improved by adjusting proportion of solid and liquid stabilizers; the whole Vicat softening temperature of the material is increased by adding proper filler. The filler adopts talcum powder which is modified on surface and has the pH being 8-9. The talcum powder as the filler can bond better with CPVC resin while not producing great influence on other properties of the material. Meanwhile, the talcum powder is an inorganic substance, so that the Vicat softening temperature of the material can be increased to a certain degree, and cost can be reduced substantially. The Vicat softening temperature of the material can reach 116 DEG C which is 6 DEG C higher than that specified in the nationalstandard, while other physical properties are not affected.

Description

technical field [0001] The invention discloses a new chlorinated polyvinyl chloride (CPVC) pipe material formula with ultra-high Vicat softening point temperature. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) is a polymer formed by chlorination of PVC resin. It has the characteristics of corrosion resistance, aging resistance, flame retardant and good electrical performance. CPVC hard products can be used for a long time at a temperature close to 100°C, and at higher temperatures, they still have good acid resistance, alkali resistance, and chemical resistance, and can maintain good mechanical properties. The overall performance is far better than PVC and other resins can fully meet the special requirements for equipment and pipelines in chemical production. Because CPVC is not affected by residual chlorine in tap water, there will be no cracks and leaks, and it is also very suitable for civil cold and hot water pipe systems. Major developed countrie...

Claims

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Application Information

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IPC IPC(8): C08L27/24C08L51/04C08L23/06C08L23/30C08K13/06C08K9/02C08K9/04C08K3/34C08K3/22C08K3/26C08K5/57
Inventor 郑皓
Owner SHANGHAI CHLOR ALKALI CHEM
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