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Preparation method of heat-resistant PVC (polyvinyl chloride) pipe

A PVC pipe and PVC resin technology, applied in the field of PVC pipe preparation, can solve the problems of low heat resistance and deformation of PVC pipes, and achieve the effects of stable production process, improved stability, and excellent mechanical properties

Inactive Publication Date: 2018-03-16
安徽金昊天塑胶科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC pipe has strong corrosion resistance, easy bonding, low price, and hard texture. However, commercially available PVC pipes generally have low heat resistance. Ordinary PVC pipes will deform at about 50°C.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method for a heat-resistant PVC pipe, comprising the following steps:

[0018] (1) Mix PVC resin and tetrabutylammonium fluoride at a mass ratio of 15:1, heat to 68°C until tetrabutylammonium fluoride is completely melted, mix and stir evenly, and cool to room temperature to prepare Obtain modified PVC resin;

[0019] (2) In parts by weight, 22 parts of polybenzimidazole fiber, 18 parts of polytetrafluoroethylene resin, and 20 parts of acetaldehyde ammonium trimer were mixed and stirred and heated. When the temperature rose to 80 ° C, the Add 4 parts of aluminum borate and 8 parts of zirconia, continue heat preservation and mixing for 15 minutes, and then cool to room temperature to obtain a heat-resistant agent;

[0020] (3) In parts by weight, 94 parts of modified PVC resin, 4 parts of calcium-zinc stabilizer, 11 parts of heat-resistant agent, and 6 parts of calcium carbonate were added to the extruder, extruded, cooled and shaped to obtain finished pr...

Embodiment 2

[0026] A preparation method for a heat-resistant PVC pipe, comprising the following steps:

[0027] (1) Mix PVC resin and tetrabutylammonium fluoride at a mass ratio of 18:1, heat to 70°C until tetrabutylammonium fluoride is completely melted, mix and stir evenly, and cool to room temperature to prepare Obtain modified PVC resin;

[0028] (2) In parts by weight, mix and stir 24 parts of polybenzimidazole fiber, 21 parts of polytetrafluoroethylene resin, and 23 parts of acetaldehyde ammonia trimer, and heat them. When the temperature rises to 80 ° C, add Add 5 parts of aluminum borate and 10 parts of zirconia, continue heat preservation and mixing for 18 minutes, and then cool to room temperature to obtain a heat-resistant agent;

[0029] (3) In parts by weight, 96 parts of modified PVC resin, 5 parts of calcium-zinc stabilizer, 13 parts of heat-resistant agent, and 7 parts of calcium carbonate were added to the extruder, extruded, cooled and shaped to obtain finished product...

Embodiment 3

[0035] A preparation method for a heat-resistant PVC pipe, comprising the following steps:

[0036] (1) Mix PVC resin and tetrabutylammonium fluoride at a mass ratio of 20:1, heat to 72°C until tetrabutylammonium fluoride is completely melted, mix and stir evenly, and cool to room temperature to prepare Obtain modified PVC resin;

[0037] (2) In parts by weight, 26 parts of polybenzimidazole fiber, 23 parts of polytetrafluoroethylene resin, and 25 parts of acetaldehyde ammonium trimer are mixed and stirred and heated. When the temperature rises to 80 ° C, add Add 7 parts of aluminum borate and 11 parts of zirconia, continue heat preservation and mixing for 20 minutes, and cool to room temperature to obtain a heat-resistant agent;

[0038] (3) In parts by weight, 98 parts of modified PVC resin, 7 parts of calcium-zinc stabilizer, 15 parts of heat-resistant agent, and 9 parts of calcium carbonate are added to the extruder, and after extrusion molding, cooling and setting, the o...

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Abstract

The invention discloses a preparation method of a heat-resistant PVC (polyvinyl chloride) pipe. The preparation method includes the operation steps: (1) mixing PVC resin and tetrabutylammonium fluoride, heating mixture to reach the temperature of 68-72 DEG C, uniformly mixing and stirring the mixture after completely melting of the tetrabutylammonium fluoride, and cooling the mixture to reach indoor temperature to prepare modified PVC resin; (2) mixing, stirring and heating polybenzimidazole fibers, polytetrafluoroethylene resin and acetaldehyde ammonia trimers, adding aluminum borate and zirconium oxide when the temperature reaches 80 DEG C, continuing to keep temperature and mix mixture for 15-20 minutes, and cooling the mixture to reach the indoor temperature to prepare heat-resistant agents; (3) adding the modified PVC resin, calcium-zinc stabilizers, the heat-resistant agents and calcium carbonate into a extruding machine, and performing extrusion molding, cooling and sizing to obtain the heat-resistant PVC pipe. The preparation method is stable in production process, continuous mass production can be achieved, the prepared PVC pipe is excellent in mechanical property and particularly has excellent heat resistance, and the quality of the PVC pipe is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of PVC pipe preparation, and in particular relates to a preparation method of a heat-resistant PVC pipe. Background technique [0002] PVC pipe is made of polyvinyl chloride resin, stabilizer, lubricant, etc., and then extruded by hot pressing. It is the earliest plastic pipe to be developed and applied. PVC pipes have strong corrosion resistance, easy bonding, low price, and hard texture. However, commercially available PVC pipes generally have low heat resistance. Ordinary PVC pipes will deform at about 50°C. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for preparing a heat-resistant PVC pipe. [0004] The present invention is achieved through the following technical solutions. [0005] A preparation method for a heat-resistant PVC pipe, comprising the following steps: [0006] (1) Mix PVC resin and tetrabutylammonium fluori...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L79/04C08L27/18C08K13/02C08K5/19C08K3/38C08K3/22C08K3/26
CPCC08L27/06C08K2003/2244C08K2003/265C08K2003/387C08L2201/08C08L2203/18C08L2205/03C08L79/04C08L27/18C08K13/02C08K5/19C08K3/38C08K3/22C08K3/26
Inventor 张鹏
Owner 安徽金昊天塑胶科技发展有限公司
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