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A kind of regulator for emulsion polymerization and preparation method thereof

A technology of emulsion polymerization and regulator, applied in the field of emulsion polymerization, can solve the problems of increased viscosity of the system, hindered polymerization reaction, and cannot be solved well.

Active Publication Date: 2022-04-22
山东京博中聚新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, due to the reduction of emulsification efficiency in the late stage of high-temperature emulsion polymerization, a series of problems such as increased viscosity of the system and reduced conversion rate will occur, which seriously affect the polymerization efficiency and product quality.
Aiming at this problem, the method usually adopted in the prior art is to add an emulsifier, an initiator or a viscosity reducer during the polymerization process. However, there are still certain problems in the above-mentioned method: adding a single additive separately can only act on one side. To a certain effect, and can only have a single effect within a certain period of time, as the reaction progresses, other problems will appear at subsequent time points, such as adding an initiator in the middle of the reaction, there will be a certain rate increase at this stage, but with the As the reaction proceeds, the progress of the polymerization reaction will be hindered due to the increase in viscosity, so it is necessary to reduce the viscosity of the system, and the viscosity reduction will lead to the decline of the emulsified system.
Therefore, the above method cannot better solve the above problems.

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  • A kind of regulator for emulsion polymerization and preparation method thereof
  • A kind of regulator for emulsion polymerization and preparation method thereof
  • A kind of regulator for emulsion polymerization and preparation method thereof

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preparation example Construction

[0038] The invention provides a kind of preparation method of regulator for emulsion polymerization, comprising the following steps:

[0039] a) mixing hydrogen peroxide, electrolyte, co-stabilizer and modifier to obtain a hydrogen peroxide-based modification solution;

[0040] b) After mixing and reacting the hydrogen peroxide-based modification solution with a soluble sodium salt solution, drying to obtain a regulator powder;

[0041] c) Melting the straight-chain saturated fatty acid and mixing it with the conditioner powder, and spray drying to obtain microcapsule conditioner particles.

[0042] The present invention mixes hydrogen peroxide, electrolyte, co-stabilizer and modifier to form a hydrogen peroxide-based modified liquid; then mixes it with a soluble sodium salt solution and dries it to obtain regulator powder; The fatty acid is mixed with the conditioner powder, and the conditioner powder is coated to obtain microcapsule-type conditioner particles with a core-sh...

Embodiment 1

[0078] S1. Take 650g of sodium carbonate, add deionized water, stir and dissolve at 35°C, and obtain a saturated solution of sodium carbonate with a concentration of 45% by hot suction filtration.

[0079] S2. Take 1167g hydrogen peroxide solution (30% concentration), add 150g potassium chloride, 100g sodium phosphate, 1.5g sodium methylene dinaphthalenesulfonate, 0.5g sodium methylnaphthalenesulfonate, 0.5g EDTA-2Na, stir well , to obtain hydrogen peroxide-based modified liquid.

[0080] S3, control the feed rate of the metering pump, the feed rate of saturated sodium carbonate solution is 50mL / min, the feed rate of hydrogen peroxide-based modified liquid is 42mL / min, and enter the three-stage static mixer (single section length 2m, pipeline diameter 1.2 cm), the first stage is 35°C and stays for 3 minutes, the second stage is 25°C and stays for 3 minutes, the third stage is 15°C and stays for 3 minutes. Drying, after being ground by a grinder, passing through a 100-mesh sie...

Embodiment 2

[0086] S1. Take 750 g of sodium carbonate, add deionized water, stir and dissolve at 35° C., and obtain a saturated solution of sodium carbonate with a concentration of 45% through hot suction filtration.

[0087] S2. Take 834g hydrogen peroxide solution (concentration 30%), add potassium chloride 100g, sodium metaphosphate 100g, sodium methylene dinaphthalenesulfonate 0.5g, sodium naphthalenesulfonate 1g, EDTA-2Na 0.5g, EDTA-4Na 0.3 g, stir evenly to obtain a hydrogen peroxide-based modified liquid.

[0088] S3, control the feed rate of the metering pump, the feed rate of saturated sodium carbonate solution is 60mL / min, the feed rate of hydrogen peroxide-based modified liquid is 30mL / min, and enter the three-stage static mixer (single section length 2m, pipeline diameter 1.2 cm), the first stage is 35°C, stay for about 3min, the second stage is 25°C, stay for about 3min, the third stage is 15°C, stay for about 3min, after fully reacting, enter the 12°C low-temperature tank, a...

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Abstract

The invention provides a regulator for emulsion polymerization and a preparation method thereof. The present invention mixes hydrogen peroxide, electrolyte, co-stabilizer and modifier to form a hydrogen peroxide-based modified liquid; then mixes it with a soluble sodium salt solution and dries it to obtain a regulator powder; then utilizes melted linear saturated fatty acid and The conditioner powder is mixed and coated to obtain microcapsule conditioner particles with a core-shell structure. The present invention firstly prepares sodium-based regulator powder with high specific gravity and small particle size, and coats it with straight-chain saturated fatty acid to form microcapsules, which are more uniformly dispersed in the emulsion polymerization system. Under alkaline and heating conditions in the polymerization system, The formation of fatty acid salts plays a re-emulsification role in the polymerization system. At the same time, the released sodium salt decomposes to form free radicals, which plays a secondary initiating role. After the electrolyte is released, the concentration of micelles in the polymerization system is adjusted to play a certain Viscosity-reducing effect, through the synergistic cooperation of the above multiple effects, the polymerization efficiency and product quality are improved.

Description

technical field [0001] The invention relates to the technical field of emulsion polymerization, in particular to a regulator for emulsion polymerization and a preparation method thereof. Background technique [0002] Emulsion polymerization is to disperse the monomer in water to form an emulsion with the aid of an emulsifier and mechanical stirring, and then initiate the polymerization of the monomer under the action of an initiator. The system is usually mainly composed of monomer, water, emulsifier and initiator. This polymerization method is the main method of latex synthesis. Wherein, the high-temperature emulsion polymerization refers to the polymerization whose polymerization temperature is above 40°C. [0003] At present, due to the reduction of emulsification efficiency in the late stage of high-temperature emulsion polymerization, a series of problems such as increased system viscosity and reduced conversion rate will occur, which seriously affect the polymerizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/38C08F2/22C08F2/26C08F236/10B01J13/04
CPCC08F2/38C08F2/22C08F2/26C08F236/10B01J13/043
Inventor 刘清钊王欣郭平云栾波任学斌刘振学
Owner 山东京博中聚新材料有限公司
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