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Preparation method of efficient anti-sticking kettle coating agent for polyvinyl chloride suspension polymerization

A technology of suspension polymerization and polyvinyl chloride, which is applied in the direction of coating, etc., can solve the problems of increasing the complexity of preparation, and achieve the effects of enhancing storage and use stability, good clarity and transparency, and enhancing anti-oxidation performance

Active Publication Date: 2021-11-19
鄂尔多斯市瀚博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also needs to go through the process of heating up first and then cooling down, which increases the complexity of preparation.

Method used

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  • Preparation method of efficient anti-sticking kettle coating agent for polyvinyl chloride suspension polymerization
  • Preparation method of efficient anti-sticking kettle coating agent for polyvinyl chloride suspension polymerization
  • Preparation method of efficient anti-sticking kettle coating agent for polyvinyl chloride suspension polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 8 parts of 99% refined 1-naphthol, 50 parts of water, and 10 parts of 32% sodium hydroxide solution into the reactor, start stirring, and replace the air in the reactor with nitrogen; heat the reactor until the reaction temperature is stable at 95°C, Slowly add a mixture of 10 parts of sodium sulfoxylate formaldehyde and 10 parts of formaldehyde aqueous solution to the reactor, dropwise for 2 hours, to ensure that the reactor is an alkaline environment, and the pH value is 11-13; After continuing to react for 4 hours, cool to room temperature, add 100 parts of water, 10 parts of benzenesulfonic acid aqueous solution and 10 parts of polyvinyl alcohol aqueous solution, stir for 30 minutes, and let it stand for 10 days to obtain a transparent water-soluble phenolic resin with a specific gravity of 5%-6%. Pale yellow anti-stick kettle coating product.

Embodiment 2

[0051] Add 8 parts of 99% refined 1-naphthol, 50 parts of water, and 15 parts of 32% sodium hydroxide solution into the reactor, start stirring, and replace the air in the reactor with argon; heat the reactor until the reaction temperature is stable at 97°C , slowly drop a mixture of 10 parts of sodium sulfoxylate formaldehyde and 10 parts of formaldehyde aqueous solution into the reactor for 2 hours to ensure that the reactor is an alkaline environment with a pH value of 11-13; After continuing to react for 8 hours, cool to room temperature, add 100 parts of water, 10 parts of benzenesulfonic acid aqueous solution and 10 parts of polyvinyl alcohol aqueous solution, stir for 30 minutes, and let it stand for 12 days to obtain a water-soluble phenolic resin with a specific gravity of 5%-6%. Transparent light yellow anti-stick kettle coating product.

Embodiment 3

[0053]Add 8 parts of 99% refined 1-naphthol, 50 parts of water, and 15 parts of 32% sodium hydroxide solution into the reactor, start stirring, and replace the air in the reactor with nitrogen; heat the reactor until the reaction temperature is stable at 100°C, Slowly add a mixture of 5 parts of sodium bisulfite formaldehyde and 10 parts of formaldehyde aqueous solution to the reactor, dropwise for 1 hour, to ensure that the reactor is an alkaline environment, and the pH value is 11-13; After continuing to react for 8 hours, cool to room temperature, add 100 parts of water, 10 parts of benzenesulfonic acid aqueous solution, 10 parts of polyvinyl alcohol aqueous solution and 5 parts of sodium bisulfite formaldehyde, stir for 20 minutes, and let stand for 13 days to obtain the specific gravity of water-soluble phenolic resin It is a 5%-6% transparent light yellow anti-sticking kettle coating agent product.

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Abstract

The invention discloses a preparation method of an efficient anti-sticking kettle coating agent for polyvinyl chloride suspension polymerization, and relates to the technical field of anti-sticking kettle agents. The preparation method comprises the steps of adding 1-naphthol, water and a sodium hydroxide aqueous solution into a reactor, starting stirring, and replacing air in the reactor; heating the reactor, mixing part or all of the sodium formaldehyde sulfoxylate and the formaldehyde aqueous solution, dropwise adding the mixture into the reactor, and stirring for reaction; cooling, adding water, a benzenesulfonic acid aqueous solution, a polyvinyl alcohol aqueous solution and the balance of sodium formaldehyde sulfoxylate, adjusting the solid content, and stirring to obtain a light yellow phenolic resin aqueous solution product; and standing the obtained product to obtain a light yellow clear anti-sticking kettle coating agent product. The preparation method is simple and easy to operate, the anti-sticking effect is good, the product is a light yellow clear transparent solution, the quality of the resin product is improved, and the storage and use stability of the product is enhanced.

Description

technical field [0001] The invention relates to the technical field of anti-sticking still agent, in particular to a method for manufacturing a high-efficiency anti-sticking still coating agent for polyvinyl chloride suspension polymerization. Background technique [0002] During the polymerization of vinyl chloride, a part of the polymer material will stick to the wall of the polymerization kettle, the agitator, and the baffle, which is called "sticky kettle", which brings great harm to the production of PVC. After the kettle wall is bonded, the heat transfer coefficient of the kettle wall decreases, and the heat of reaction cannot be removed in time, which forces the polymerization rate to be reduced and the polymerization time to be prolonged. The porosity of the sticky material is low, the processing and plasticizing performance is poor, and it is easy to form "fish eyes", which makes PVC products easy to age and affects the quality of products. The cleaning of the kett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/08C09D129/04C09D7/63
CPCC09D161/06C09D7/63C08L29/04C08K5/42
Inventor 赵长森颜艺专张强王会昌牛强
Owner 鄂尔多斯市瀚博科技有限公司
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