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Preparation method of anti-aging PVC plastic template

A plastic formwork and anti-aging technology, which is applied in the field of building materials, can solve the problems of physical and mechanical performance degradation, poor stability, and small branching degree, and achieve the effects of light weight, improved heat aging resistance, and improved impact strength

Inactive Publication Date: 2021-01-15
界首市晟翔新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PVC is a white powder with an amorphous structure, the degree of branching is small, the relative density is about 1.4, the glass transition temperature is 77~90°C, it begins to decompose at about 170°C, and it has poor stability to light and heat. When exposed to sunlight, it will decompose to produce hydrogen chloride, and further autocatalyze the decomposition, causing discoloration and rapid decline in physical and mechanical properties. Therefore, it is necessary to improve the performance of building templates made of polyvinyl chloride resin to improve their aging resistance.

Method used

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  • Preparation method of anti-aging PVC plastic template

Examples

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preparation example Construction

[0037] A method for preparing an aging-resistant PVC plastic formwork, comprising the following steps:

[0038] (1) Preparation of complex phosphate ester:

[0039] Add phosphate ester and sodium silicate to the reaction kettle, stir and mix together, heat to 70-75°C, keep warm for 20 minutes, then add propyltrimethoxysilane, dimethyl sulfate, carbon nanotubes, and continue stirring for 30 minutes , then pass nitrogen gas, exhaust air, then heat to 180°C, keep warm for 12 hours, let stand for 40min, then cool to 35°C, then use ether to wash, then carry out suction filtration, and dry to constant weight, that is ;

[0040] (2) Preparation of composite stabilizer:

[0041] Mix hexamethylenediamine piperidine, adipoyl chloride, and cetyl alcohol maleate monoester for a mixed reaction, then add dropwise an alkali solution to continue the reaction, and distill and dry after the reaction to obtain the product;

[0042] The alkaline solution is potassium hydroxide solution;

[00...

Embodiment 1

[0083] A method for preparing an aging-resistant PVC plastic formwork, comprising the following steps:

[0084] (1) Preparation of complex phosphate ester:

[0085] Add phosphate ester and sodium silicate to the reaction kettle, stir and mix together, heat to 70°C, keep warm for 20 minutes, then add propyltrimethoxysilane, dimethyl sulfate, carbon nanotubes, continue stirring for 30 minutes, and then Introduce nitrogen, discharge air, then heat to 180°C, keep warm for 12 hours, let stand for 40 minutes, then cool to 35°C, then use ether to wash, then carry out suction filtration, and dry to constant weight to obtain; The mixed molar ratio of phosphoric acid ester, propyltrimethoxysilane and dimethyl sulfate is 4:2:1; the weight ratio of phosphoric acid ester and sodium silicate is 3:1; the weight ratio of phosphoric acid ester and carbon nanotube The portion ratio is 10:1. The carbon nanotubes are surface-treated: add the carbon nanotubes to a nitric acid solution with a mas...

Embodiment 2

[0093] A method for preparing an aging-resistant PVC plastic formwork, comprising the following steps:

[0094] (1) Preparation of complex phosphate ester:

[0095] Add phosphate ester and sodium silicate to the reaction kettle, stir and mix together, heat to 70°C, keep warm for 20 minutes, then add propyltrimethoxysilane, dimethyl sulfate, carbon nanotubes, continue stirring for 30 minutes, and then Introduce nitrogen, discharge air, then heat to 180°C, keep warm for 12 hours, let stand for 40 minutes, then cool to 35°C, then use ether to wash, then carry out suction filtration, and dry to constant weight to obtain; The mixed molar ratio of phosphoric acid ester, propyltrimethoxysilane and dimethyl sulfate is 4:2:1; the weight ratio of phosphoric acid ester and sodium silicate is 3:1; the weight ratio of phosphoric acid ester and carbon nanotube The portion ratio is 10:1. The carbon nanotubes are surface-treated: add the carbon nanotubes to a nitric acid solution with a mas...

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Abstract

The invention discloses a preparation method of an anti-aging PVC plastic template. The method relates to the technical field of building materials and comprises the following steps: (1) preparing composite phosphate; (2) preparing a compound stabilizer; (3) performing vacuum premixing; and (4) performing extrusion molding; a building template prepared by the method has the advantages of high strength, light weight, corrosion resistance, aging resistance and the like, the processing and forming method is simple and convenient, different requirements can be met, the building template can be repeatedly used, and resources are greatly saved. The building template is easy to manufacture, low in cost, convenient to machine, good in mechanical property and capable of being conveniently recycleddue to the fact that plastic materials are adopted.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a method for preparing an aging-resistant PVC plastic formwork. Background technique [0002] Architectural plastic formwork is an energy-saving and environmentally friendly product. The promotion and application of plastic formwork, "replacing wood with plastic", is an important measure to save resources and protect the environment, and it is the key to implementing "green construction" in formwork projects links. Polyvinyl chloride, referred to as PVC (Polyvinyl chloride), is an initiator of vinyl chloride monomer (VCM) in peroxides, azo compounds, etc.; or under the action of light and heat according to the mechanism of free radical polymerization aggregated polymers. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. [0003] PVC is a white powder with an amorphous structure, the degree of branching i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/06C08K13/06C08K9/02C08K3/04C08K5/098C08K3/26C08K3/34C08K5/521
CPCC08K2003/265C08K2201/011C08L27/06C08L2201/08C08L23/06C08K13/06C08K9/02C08K3/041C08K5/098C08K3/26C08K3/34C08K5/521
Inventor 朱鹏飞
Owner 界首市晟翔新型建材有限公司
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