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Method for preparing anti-scale agent used for suspension free-radical polymerization reactor

A technology of polymerization reaction kettle and anti-sticking kettle agent, applied in the direction of coating, etc., can solve the problems that the anti-adhering agent is not transparent enough, the anti-sticking kettle agent is not ideal enough, etc., and can shorten the production cycle, delay the formation of adhesive, The effect of improving production efficiency

Inactive Publication Date: 2010-06-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of some anti-sticking kettle agents is not ideal enough. If the color is too dark, it will affect the color change of the organic polymer product obtained through polymerization during use; during use, it will discharge dark waste water that is easy to cause pollution; The adhesive is not transparent enough in appearance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First add 1000g of deionized water into the reaction vessel, vacuum out the oxygen and fill it with high-purity nitrogen to maintain the inert atmosphere; under the protection of the inert atmosphere, add 63g of 1-naphthol and 120g of sodium hydroxide in sequence, and add vitamin E to the deionized water, The amount of addition is 0.6% of the mass of deionized water; the temperature is raised to 100° C. by external heating while utilizing the exothermic heat of dissolution. After the temperature is stable, add 45g of 37% formaldehyde solution dropwise to the system under an inert atmosphere, keep stirring at 250 rpm, keep the pH at 12, and after constant temperature reaction for 2 hours, add polyvinyl alcohol and polyvinyl acetal to the system to form a film Continue the constant temperature reaction for 1 hour. After the reaction and dissolution, cool the obtained anti-sticking agent to 25°C, add sodium borohydride at 1% by weight under the protection of an inert atmosp...

Embodiment 2

[0028] First add 1000g of deionized water into the reaction container, vacuum out the oxygen and fill it with high-purity nitrogen to maintain the inert atmosphere; under the protection of the inert atmosphere, add 75g of 1-naphthol and 112g of sodium hydroxide in sequence, and add vitamin E to the deionized water, The amount of addition is 0.8% of the mass of deionized water; the temperature is raised to 96° C. by external heating while utilizing the exothermic heat of dissolution. After the temperature is stable, add 63g of 37% formaldehyde solution dropwise to the system under an inert atmosphere, keep stirring at 450 rpm, keep the pH at 12, and after 2 hours of constant temperature reaction, add polyvinyl alcohol film-forming agent to the system and continue the constant temperature reaction 1h, after the reaction and dissolution, the obtained anti-sticking agent is cooled to 25°C, and the reductive stabilizer amine borane is added. -A condensate weight percent content of ...

Embodiment 3

[0030] First add 1000g of deionized water into the reaction container, vacuum out the oxygen and fill it with high-purity nitrogen to maintain the inert atmosphere; under the protection of the inert atmosphere, add 70g of 1-naphthol and 115g of sodium hydroxide in sequence, and add vitamin F to the deionized water, The amount added is 0.5% of the mass of deionized water; the temperature is raised to 106° C. by external heating while utilizing the exothermic heat of dissolution. After the temperature is stable, add 55 g of 37% formaldehyde solution dropwise to the system under an inert atmosphere, keep stirring at 350 rpm, keep the pH at 13, and after constant temperature reaction for 2 hours, add polyvinyl acetal film-forming agent to the system, continue React at constant temperature for 1 hour. After the reaction and dissolution, cool down the obtained anti-sticking agent to 25°C, add the reductive stabilizer Diabai powder, the amount of which accounts for 1% of the weight pe...

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PUM

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Abstract

The invention aims at providing a method for preparing an anti-scale agent. The prepared anti-scale agent continuously captures free radicals adsorbed to the wall of a reactor in the process of the polymerization reaction of vinyl monomer suspension free radicals, but does not affect the behavior of other free radicals in a reaction system, thereby effectively avoiding or weakening the formation of bonding materials on the wall of the reactor, effectively solving the problem of scale formation, obviously shortening the production period of corresponding organic polymer products, improving the production efficiency and reducing the production cost. Because the appearance of the anti-scale agent is in light color, clear and transparent and can avoid the effect of sheddings in dark color, the anti-scale agent is beneficial to relatively improving the quality of the synthetic organic polymer products.

Description

technical field [0001] The invention relates to a method for manufacturing an anti-sticking agent, more specifically, to a method for manufacturing an anti-sticking agent for a suspension radical polymerization reactor. Background technique [0002] When vinylic organic monomers are used for free radical reaction polymerization in a polymerization reactor to produce corresponding organic polymer products, polymers are formed on the reactor wall due to the free radicals adsorbed on the reactor wall initiate monomer polymerization product, will gradually accumulate and form a sticky mass on the walls of the reactor. These binders will occupy the polymerization reaction space in the polymerization reaction kettle, reduce the production capacity of the polymerization reaction kettle, and when they fall into the polymerization reaction system, there is a gap between the molecular structure and the molecular structure of the synthesized polymer product. Obvious differences will l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/14C09D129/04C09D161/08C08G8/08C08F2/18
Inventor 李景庆
Owner TIANJIN UNIV
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