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Novel efficient anti-sticking kettle agent for PVC suspension polymerization production and preparation method of novel efficient anti-sticking kettle agent

A technology of anti-sticking agent and suspension polymerization, applied in the direction of coating, etc., can solve the problems of difficult to meet the production requirements of PVC polymerization, poor anti-sticking effect, poor wall coating effect, etc., and achieve synergistic effect, good wall coating effect, Effect of improving anti-stick performance

Active Publication Date: 2021-01-26
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-adhesive effect of the existing anti-adhesive kettle agent, and the poor wall coating effect, so that it is difficult to meet the shortage of PVC polymerization production requirements, and to provide a new type of high-efficiency anti-adhesive for PVC suspension polymerization production Kettle agent and preparation method thereof

Method used

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  • Novel efficient anti-sticking kettle agent for PVC suspension polymerization production and preparation method of novel efficient anti-sticking kettle agent

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preparation example Construction

[0033] The present invention provides a preparation method of the above-mentioned novel 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 recipe 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 warm at 70-75°C for 2.5-3 hours.

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

Embodiment 1

[0044] The composition and ratio of the anti-sticking pot 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 completely 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 3 hours. The temperature of the reactor was raised to 90°C, and 2% of 1-naphthol-4-carboxylic acid, 1% o...

Embodiment 2

[0047] The composition and ratio of the anti-sticking pot agent are: o-hydroxybenzaldehyde 1%, 1, 4, 5, 8-tetrahydroxynaphthalene 6%, 1-naphthol-4-carboxylic acid 3%, formaldehyde sodium 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-carboxyli...

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Abstract

The invention discloses a novel efficient anti-sticking kettle agent for PVC suspension polymerization production and a preparation method of the novel efficient anti-sticking kettle agent, which belong to the technical field of PVC polymerization production. The anti-sticking kettle agent comprises 1%-6% of o-hydroxybenzaldehyde, 1%-6% of 1, 4, 5, 8-tetrahydroxy naphthalene, 1%-3% of 1-naphthol-4-carboxylic acid, 1%-4% of sodium formaldehyde sulfoxylate, 1%-3% of a film-forming agent, 1%-2% of a catalyst, 1%-2% of a reduction protective agent, 5%-15% of methanol and the balance deionized water. The preparation method comprises the following steps of adding 1, 4, 5, 8-tetrahydroxy naphthalene and sodium hydroxide into a reaction kettle, dropwise adding a mixed solution of o-hydroxybenzaldehyde, sodium formaldehyde sulfoxylate and deionized water, and carrying out heat preservation, dropwise adding a mixed solution of 1-naphthol-4carboxylic acid, sodium hydroxide and deionized water, carrying out heat preservation twice, adding polyvinyl alcohol, a reduction protective agent, methanol and the balance of deionized water, and stirring to room temperature. The anti-sticking kettle agent disclosed by the invention is good in anti-sticking effect, good in wall coating effect, simple in production process, low in cost and convenient for industrial popularization and application.

Description

technical field [0001] The invention belongs to the technical field of PVC polymerization production, and more specifically relates to a novel 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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