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Preparation method of heat-fusible modified polyvinyl chloride (PVC) pipe

A technology of polyvinyl chloride and polyvinyl chloride resin is applied in the field of preparation of hot-melt-modified polyvinyl chloride pipes, which can solve the problems that PVC pipes cannot be hot-melted, high construction cost, slow speed, etc., and reduce construction costs. , long service life and fast speed

Inactive Publication Date: 2015-01-28
SHANGHAI YUANZHOU PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing heat-melt modified polyvinyl chloride pipes in view of the deficiencies in the prior art. The pipes are prepared by using modified PVC, which greatly improves the performance of heat-melt welding and realizes the heat-melt of PVC pipes. Butt joint, better solve the problem that PVC pipe cannot be hot-melt welded in engineering construction, high construction cost and slow speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The present invention is prepared with the following steps:

[0018] a. Initial mixing

[0019] Dry 8 kg of ethylene bis stearic acid amide (EBS) resin at 70°C for 2 hours with 2.0 kg of bisphenol-A epoxy resin, 0.5 kg of ultraviolet absorber UV531, 1 kg of barium stearate and 1.5 kg of phosphoric acid Add ethylenediamine to the mixer respectively, stir at high speed to 110°C and then cool to 60°C to be the mixture for the next process; the epoxy value of the bisphenol-A epoxy resin is 0.09~0.14eq / 100g, and its organic Chlorine≤0.02mol / 100g.

[0020] b. Blending

[0021] Add 5.0kg of methyl styrene oligomer resin (AMS), 5.5kg of calcium-zinc composite stabilizer and 100kg of polyvinyl chloride resin into the mixer respectively, add 3kg of epoxy soybean oil and prepare in step a above when stirring at high speed to 90°C Continue to stir at high speed to 125°C and then cool to 40°C for extrusion; the epoxy value of the epoxy soybean oil is ≥6.0%, and the iodine value...

Embodiment 2

[0025] The present invention is prepared according to the following steps:

[0026] a. Initial mixing

[0027] Dry 6kg of methyl methacrylate-butadiene-styrene terpolymer resin (MBS) at 80°C for 1 hour and mix with 3.5kg of bisphenol-A epoxy resin and 0.5kg of ultraviolet absorber UV-P , 1kg barium hardate and 2.5kg xylene are added to the mixer respectively, and after being stirred at a high speed to 100° C., it is cooled to 65° C. as a mixture for the next process; the epoxy value of the bisphenol-A epoxy resin is 0.09 ~0.14eq / 100g, its organochlorine≤0.02mol / 100g.

[0028] b. Blending

[0029] Add 9.0kg VC-g-EVA graft copolymer resin, 4.5kg rare earth composite stabilizer and 100kg polyvinyl chloride resin into the mixer, add 3kg epoxy soybean oil and the mixture prepared in step a above when stirring at high speed to 90°C, and continue to Stir to 125°C and cool to 40°C for extrusion; the epoxy value of the epoxidized soybean oil is ≥6.0%, and the iodine value is ≤6; th...

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Abstract

The invention discloses a preparation method of a heat-fusible modified polyvinyl chloride (PVC) pipe. The preparation method is characterized in that the pipe is prepared by mixing 100 parts by weight of PVC resin, 1.5-6.0 parts by weight of a plasticizer, 0.5-4.0 parts by weight of an activator, 3.0-8.0 parts by weight of a toughening agent, 4-10 parts by weight of an impact modifier, 1 part by weight of barium stearate, 0.5 part by weight of an ultraviolet absorber, 2-6 parts by weight of a stabilizer and 1.0-5.0 parts by weight of epoxy resin, stirring, mixing and then extruding for molding. Compared with the prior art, by adopting the preparation method disclosed by the invention, heat-fusible welding is realized, the use of a flare and an adhesive in butting construction of PVC pipes is eliminated, and the production and construction cost is reduced by about 20-30%; and furthermore, the pipe has good impact resistance, high tensile strength, long service life, high welding strength and firm connection, and is particularly suitable for butting of the PVC pipes in trenchless engineering construction.

Description

technical field [0001] The invention relates to the technical field of non-metallic building materials, in particular to a method for preparing heat-melt-modified polyvinyl chloride pipes. Background technique [0002] At present, with the development of my country's economy and urban construction, the construction of urban pipelines is developing very rapidly. Various electric power, cables, wires, and communication optical cables are gradually required to be buried underground from the original overhead laying. The buried overhead cables are generally excavated. Or trenchless technology for laying pipeline construction. The excavation technology is relatively simple, and the construction requirements are low, while the non-excavation technology has high requirements, and the construction is difficult. Since these construction technologies require simple, convenient, fast and reliable construction, the connection method and connection firmness of the pipeline are put forward...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L63/00C08L51/04C08L51/00C08K5/098C08K5/1515C08K5/01B29C47/92B29C48/92
CPCC08L27/06C08L2203/18C08L2205/03C08L2205/035C08L91/00C08L63/00C08K13/02C08K5/20C08K5/098C08L33/12C08L51/06C08K5/01
Inventor 柏占宽周文忠祝正明
Owner SHANGHAI YUANZHOU PIPE
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