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A kind of preparation method of polyvinyl chloride resin with high thermal stability

A technology of polyvinyl chloride resin and high thermal stability, which is applied in the field of preparation of stable polyvinyl chloride resin, can solve the problems of high price, easy yellowing, increased load of stripping and drying process, etc., and achieves low production cost and simple operation. , COD value does not increase the effect

Active Publication Date: 2022-05-13
内蒙古鄂尔多斯电力冶金集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-soluble terminators have the advantages of high safety, stable storage, good heat aging whiteness and low price, but the thermal stability time of the resin is short, and it is easy to yellow at high temperature
Emulsion type terminators have the advantages of high safety, heat aging whiteness and good heat stability time, but they are more expensive, have poor seasonal storage stability and increase the load of the stripping and drying process
Oil-soluble terminators have the advantages of storage stability, thermal aging whiteness and thermal stability time, but are expensive, and the high COD value of centrifuged mother liquor increases the processing load

Method used

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  • A kind of preparation method of polyvinyl chloride resin with high thermal stability
  • A kind of preparation method of polyvinyl chloride resin with high thermal stability
  • A kind of preparation method of polyvinyl chloride resin with high thermal stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add 18kg of water-soluble terminator and 15kg of defoaming heat-stabilizing composite auxiliary agent in the production of polyvinyl chloride resin suspension polymerization.

[0053] The water-soluble terminator has the following composition and mass percentage content: 10% acetone thiosemicarbazone, 10% sodium thiram, 15% sodium perchlorate, 5% monopentaerythritol, 5% sodium citrate, 10% sodium hydroxide, Desalinated 45%.

[0054] The defoaming and heat-stabilizing compound auxiliary agent has the following composition and mass percentage: polyoxypropylene oxide ethylene glyceryl ether 15%, antioxidant 264 15%, monopentaerythritol 5%, epoxidized soybean oil 5%, ethanol 60%.

[0055] The preparation of the water-soluble terminator comprises the following steps:

[0056] (1) Control the temperature of the configuration kettle to 25°C, add desalted water into the configuration kettle, and start stirring;

[0057] (2) Slowly add alkaline substances for about 10 minutes ...

Embodiment 2

[0069] Add 12kg of water-soluble terminator and 10kg of defoaming heat-stabilizing composite auxiliary agent in the production of polyvinyl chloride resin suspension polymerization.

[0070] The water-soluble terminator has the following composition and mass percentage content: 10% acetone thiosemicarbazone, 10% sodium thiram, 15% sodium perchlorate, 5% monopentaerythritol, 5% sodium citrate, 10% sodium hydroxide, Desalinated 45%.

[0071] The defoaming and heat-stabilizing compound auxiliary agent has the following composition and mass percentage: polyoxypropylene oxide ethylene glyceryl ether 15%, antioxidant 264 15%, monopentaerythritol 5%, epoxidized soybean oil 5%, ethanol 60%.

[0072] The preparation of the water-soluble terminator comprises the following steps:

[0073] (1) Control the temperature of the configuration kettle to 40°C, add desalted water into the configuration kettle, and start stirring;

[0074] (2) Slowly add alkaline substances for about 10 minutes ...

Embodiment 3

[0086] Add 24kg of water-soluble terminator and 20kg of defoaming and heat-stabilizing composite auxiliary agent in the production of polyvinyl chloride resin suspension polymerization.

[0087] The water-soluble terminator has the following composition and mass percentage content: 10% acetone thiosemicarbazone, 10% sodium thiram, 15% sodium perchlorate, 5% monopentaerythritol, 5% sodium citrate, 10% sodium hydroxide, Desalinated 45%.

[0088] The defoaming and heat-stabilizing compound auxiliary agent has the following composition and mass percentage: polyoxypropylene oxide ethylene glyceryl ether 15%, antioxidant 264 15%, monopentaerythritol 5%, epoxidized soybean oil 5%, ethanol 60%.

[0089] The preparation of the water-soluble terminator comprises the following steps:

[0090] (1) Control the temperature of the configuration kettle to 10°C, add desalted water into the configuration kettle, and start stirring;

[0091] (2) Slowly add alkaline substances for about 10 minu...

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Abstract

The invention discloses a preparation method of polyvinyl chloride resin with high thermal stability, and relates to the field of polyvinyl chloride production. The method comprises the following steps: coating the wall of the polymerization kettle; sequentially adding buffer, deionized water, monomer, dispersant and initiator into the polymerization kettle to carry out polymerization reaction to obtain a reaction system; adding terminator and defoaming agent to the reaction system in sequence heat-stable composite auxiliary agent, stripping, drying, and packaging to obtain the high-heat-stable polyvinyl chloride resin; wherein, the terminator includes alkaline substances, water-soluble heat stabilizers, water-soluble heavy metal traps, terminating components and desalinated water; the defoaming and heat-stabilizing composite additives include polyether defoaming agents, alcohol-soluble antioxidants, alcohol-soluble heat stabilizers and low-carbon alcohols. The preparation method has the advantages of safety and stability, simple operation, low-temperature use, no increase in the load of the stripping and drying process and no increase in the COD value of the centrifuged mother liquor, and low production cost of polyvinyl chloride.

Description

technical field [0001] The invention relates to the field of polyvinyl chloride production, in particular to a preparation method of high heat stable polyvinyl chloride resin. Background technique [0002] As one of the three major synthetic resins in the world, polyvinyl chloride has the advantages of superior performance, strong versatility, and low price, and is widely used in the world. At present, the domestic production capacity of polyvinyl chloride is 24 million tons, more than 80% of which are produced by calcium carbide suspension polymerization. The whole production process includes three major stages of polymerization, stripping and drying. Vinyl chloride monomer is used as raw material, deionized water is used as water phase medium, dispersant, initiator, terminator, anti-sticking agent, buffer, defoaming agent Agent, liquid caustic soda and gas phase polymerization inhibitor are the main additives. As downstream processing enterprises have increasingly string...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/06C08F2/18C08F2/42C08F2/44C08L27/06C08L71/02C08L91/00C08K5/13C08K5/053
CPCC08F14/06C08F2/18C08F2/42C08F2/44C08L27/06C08L2201/08C08L2205/03C08L71/02C08L91/00C08K5/13C08K5/053
Inventor 赵长森钱荧辉颜艺专
Owner 内蒙古鄂尔多斯电力冶金集团股份有限公司