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Preparation method of water-phase method coating-grade vinylidene chloride resin

A technology of perchlorethylene resin and paint, which is applied in the field of preparation of paint-grade perchlorethylene resin by water phase method, can solve the problems of inability to absorb and reach the chlorine flow rate of paint-grade perchlorethylene resin, and inability to penetrate deeply into chlorination, etc., to achieve Low cost, significant economic benefits, and low equipment investment

Inactive Publication Date: 2020-08-04
上海宝钱新材料技术有限公司
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AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a preparation method of paint-grade perchlorethylene resin by water-phase method, which solves the problem that the existing water-phase method chlorination process cannot absorb the amount of chlorine that reaches paint-grade perchlorethylene resin, and cannot penetrate deeply. Chlorination problem

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] 256 kg of PVC predispersed material, 3,500 kg of water, 1.2 kg of azobisisobutyronitrile and benzoyl peroxide, 6.5 kg of polyvinylpyrrolidone, and 3 Kilograms, after the temperature reaches 60°C, after the air is replaced by nitrogen, keep the temperature and pass chlorine. The amount of chlorine is about 80-120 kg in theory. The initial pressure of the reactor is 0.1Mpa. Control the reaction temperature to 85-92°C to control the reaction temperature to pass chlorine. The initial pressure of the reactor is 0.2Mpa, and the amount of chlorine to pass is about 350-380 kg. When the pressure starts to reach 0.4Mpa, stop the flow of chlorine. After -0.4 kg of benzoyl peroxide, the chlorine flow is started, and after 0.1-0.3 kg of benzoyl peroxide is put into the interlayer, the chlorine flow is stopped, and the chlorine flow is about 120-160 kg, and the temperature is kept for 60 minutes. The total chlorine flow is 600-660 kg, and the reaction time is about 5 hours. After coo...

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Abstract

The invention provides a preparation method of water-phase method coating-grade perchloro-ethylene resin, which comprises the following steps: pre-dispersing PVC resin in advance, chlorinating by using multiple initiators at different temperatures in sections, and adding the initiator for the second time during later-stage sectional chlorination, thereby enabling the PVC resin to completely achieve the properties of solvent method perchloro-ethylene resin.

Description

technical field [0001] The invention relates to the field of perchlorethylene resins, in particular to a preparation method of a coating-grade perchlorethylene resin by an aqueous phase method. Background technique [0002] The chemical name of perchlorethylene resin is chlorinated polyvinyl chloride resin (CPVC for short), which is an important polymer material obtained by chlorination modification of polyvinyl chloride resin (PVC). CPVC produced by solvent method is mainly used in coatings and adhesives. The product is white or yellowish fluffy loose particles. , has excellent heat resistance, acid and alkali resistance, salt spray and oxidant resistance, etc.; and CPVC produced by suspension chlorination in water phase, after chlorination, CPVC resin has the characteristics of high temperature resistance, corrosion resistance and good dielectric properties. Widely used in hot water pipes, power pipes, oil pipes, corrosion-resistant pipes for chemical industry, high-tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/22C08F14/06
CPCC08F8/22C08F14/06
Inventor 杨太山
Owner 上海宝钱新材料技术有限公司
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