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A kind of high-efficiency anti-sticking kettle agent for production of pvc suspension polymerization and preparation method thereof

An anti-adhesive kettle agent and suspension polymerization technology, applied in the direction of coating, etc., can solve the problems of difficult to meet the production requirements of PVC polymerization, poor wall coating effect, poor anti-sticking effect, etc. Good effect, the effect of improving the anti-sticking performance

Active Publication Date: 2021-08-31
乌鲁木齐市华泰隆化学助剂有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the relatively poor anti-sticking effect of the existing anti-sticking kettle agent, and the wall-coating effect is poor, so that it is difficult to meet the shortage of PVC polymerization production requirements, and to provide a high-efficiency anti-sticking kettle for PVC suspension polymerization production Agents and their preparation methods

Method used

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  • A kind of high-efficiency anti-sticking kettle agent for production of pvc suspension polymerization and preparation method thereof

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preparation example Construction

[0033] The present invention provides a method for preparing the above-mentioned high-efficiency anti-sticking agent. The method has the characteristics of simple production process, easy-to-obtain raw materials, low product use cost, and convenient industrialization and application. It specifically includes the following steps:

[0034] (1) Add water to the reaction kettle first, start stirring, the stirring speed is 2500~3000r / min, and the stirring time is 15~30min. The temperature was raised to 65~70°C, and nitrogen gas was continuously purged.

[0035] (2) Add the 1, 4, 5, 8-tetrahydroxynaphthalene and sodium hydroxide in the prescribed amount into the kettle, and stir until they are completely dissolved.

[0036] (3) Mix and dissolve o-hydroxybenzaldehyde, sodium formaldehyde sulfoxylate and part of deionized water, add it dropwise to the reaction kettle, and keep it warm at 70~75°C for 2.5~3h.

[0037] (4) The temperature of the reaction kettle is raised to 90°C, and 1-na...

Embodiment 1

[0044] The composition and ratio of the anti-sticking agent are: 5% o-hydroxybenzaldehyde, 5% 1, 4, 5, 8-tetrahydroxynaphthalene, 2% 1-naphthol-4-carboxylic acid, sodium formaldehyde sulfoxylate 2%, polyvinyl alcohol 2%, sodium hydroxide 2%, sodium sulfite 1%, methanol 10%, and the balance is deionized water.

[0045] The preparation method of the anti-sticking pot agent: first add 20% water to the reaction kettle, start stirring, the stirring speed is 2500r / min, and the stirring time is 25min; the temperature is raised to 70°C, and nitrogen is continuously purged. Then add 5% tetrahydroxynaphthalene and 1% sodium hydroxide into the kettle and stir until all are dissolved. Continue to mix 5% o-hydroxybenzaldehyde, 2% sodium formaldehyde sulfoxylate and 10% deionized water to prepare and dissolve, then add dropwise to the reaction kettle, and keep warm at 70°C for 3h. The temperature of the reaction kettle was raised to 90°C, and 2% of 1-naphthol-4-carboxylic acid, 1% of sodiu...

Embodiment 2

[0047] The composition and ratio of anti-sticking agent are: 1% o-hydroxybenzaldehyde, 6% 1, 4, 5, 8-tetrahydroxynaphthalene, 3% 1-naphthol-4-carboxylic acid, sodium formaldehyde sulfoxylate 1%, polyvinyl alcohol 3%, potassium hydroxide 2%, sodium bisulfite 1% methanol 15%, and the balance is deionized water.

[0048] The preparation method of the anti-sticking pot agent: first add 20% water to the reaction kettle, start stirring, the stirring speed is 2600r / min, and the stirring time is 15min; the temperature is raised to 70°C, and nitrogen is continuously purged. Then add 6% of 1, 4, 5, 8-tetrahydroxynaphthalene and 1% of potassium hydroxide into the kettle, and stir until completely dissolved. Continue to mix 1% o-hydroxybenzaldehyde, 1% sodium formaldehyde sulfoxylate and 10% deionized water to prepare and dissolve, then add dropwise to the reaction kettle, and keep warm at 70°C for 2.5h. The temperature of the reactor was raised to 90°C, 3% of 1-naphthol-4-carboxylic aci...

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Abstract

The invention discloses a high-efficiency anti-sticking agent for PVC suspension polymerization production and a preparation method thereof, belonging to the technical field of PVC polymerization production. The anti-sticking still agent of the present invention comprises o-hydroxybenzaldehyde 1%-6%, 1,4,5,8-tetrahydroxynaphthalene 1%-6%, 1-naphthol-4-carboxylic acid 1%-3% , sodium formaldehyde sulfoxylate 1%-4%, film-forming agent 1%-3%, catalyst 1%-2%, reduction protection agent 1%-2%, methanol 5%-15%, and the balance is deionized water . Its preparation method is: add 1, 4, 5, 8-tetrahydroxynaphthalene and sodium hydroxide in the reaction kettle; dropwise add o-hydroxybenzaldehyde, sodium formaldehyde sulfoxylate and deionized water mixed solution and keep warm; dropwise add 1- The mixture of naphthol‑4‑carboxylic acid, sodium hydroxide and deionized water is kept warm for two times, then polyvinyl alcohol, reducing protective agent, methanol and the remaining amount of deionized water are added, and stirred to normal temperature. The anti-sticking kettle agent of the present invention has good anti-sticking effect and good wall-coating effect, and has simple production process, low cost and is convenient for industrialized popularization and application.

Description

technical field [0001] The invention belongs to the technical field of PVC polymerization production, and more specifically relates to a high-efficiency anti-sticking agent for PVC suspension polymerization production and a preparation method thereof. Background technique [0002] Since its industrialization, polyvinyl chloride (PVC) has been in the forefront of the world's plastic consumption for a long time, and its output still accounts for more than a quarter of the total plastic output. PVC is usually prepared by free radical addition polymerization, wherein the polymerization methods are mainly divided into suspension polymerization, emulsion polymerization and bulk polymerization. Industrial production is mainly based on suspension polymerization, accounting for about 80% of the total PVC output. The main steps of the method are: adding pure water, liquefied VCM monomer, and dispersant to the reaction kettle, and then adding initiator and other additives. After the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D161/14C08G8/04C08G8/28
CPCC08G8/04C08G8/28C09D161/14
Inventor 闫世友马豪杰宋桂林魏琪琪冯文辉魏坪赵世航明欧阳
Owner 乌鲁木齐市华泰隆化学助剂有限公司
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