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Preparation method of acrylic acid organic silicon soap-free copolymerization emulsion

A technology of copolymerization emulsion and silicone, which is applied in the field of polymer emulsion preparation, can solve the problems of reduced polymer film compactness, reduced polymer performance, and low polymer purity, and achieves reduced water absorption, improved water resistance, and low Effect of Film Formation Temperature

Inactive Publication Date: 2016-06-01
江苏三瑞生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is the main problem to be overcome by emulsion polymerization in recent years. Because of the use of emulsifier in ordinary emulsion polymerization, the purity of the final polymer is low, resulting in a greatly reduced compactness of the polymer film, which has a significant impact on the performance of the polymer. reduce

Method used

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  • Preparation method of acrylic acid organic silicon soap-free copolymerization emulsion
  • Preparation method of acrylic acid organic silicon soap-free copolymerization emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 120kg deionized water, 10.8kg allyl alkyl alcohol ether sulfate SR-1025, 2kg acrylamide into the pre-emulsification tank (A), then add 2.4kg methacrylic acid (AA), 55kg butyl acrylate (BA ), 130kg methyl methacrylate (MMA) were dispersed at a high speed to obtain pre-emulsion A.

[0032] Add 48.5kg deionized water, 2.34kg allyl alkyl alcohol ether sulfate SR-1025, 1.04kg methacrylamide isopropyl sulfonate AMPS-2404, 1.2kg diacetone acrylamide into the emulsification tank (B) (DAAM), 72.1kg isooctyl acrylate (2-EHA), 31.2kg methyl methacrylate (MMA), 0.78 methacrylic acid, 5.72kg γ-methacryloxypropyltrimethoxysilane (A- 174), the shell layer pre-emulsion (B) was obtained.

[0033] Add 304.2kg of deionized water and 4.2kg of SR-1025 into the reaction kettle, and then heat it to 82-84°C. Prepare 12.5kg of pre-emulsion (A) and 0.44kg of initiator potassium persulfate (KPS) + 8.3kg The deionized water solution is added into the reaction kettle, the reaction temperature...

Embodiment 2

[0039] Add 120kg deionized water, 10.8kg allyl alkyl alcohol ether sulfate SR-1025, 2kg acrylamide into the pre-emulsification tank (A), then add 2.4kg methacrylic acid (AA), 55kg butyl acrylate (BA ), 130kg methyl methacrylate (MMA) were dispersed at a high speed to obtain pre-emulsion A.

[0040] Add 48.5kg deionized water, 2.34kg allyl alkyl alcohol ether sulfate SR-1025, 1.04kg methacrylamide isopropyl sulfonate AMPS-2404, 1.2kg diacetone acrylamide into the emulsification tank (B) (DAAM), 72.1 kg isooctyl acrylate (2-EHA), 31.2 kg methyl methacrylate (MMA), 0.78 methacrylic acid, 5.72 kg vinyltrimethoxysilane (A-171) to prepare the shell Pre-emulsion (B).

[0041] Add 304.2kg of deionized water and 4.2kg of SR-1025 into the reaction kettle, and then heat it to 82-84°C. Prepare 12.5kg of pre-emulsion (A) and 0.44kg of initiator potassium persulfate (KPS) + 8.3kg The deionized water solution is added into the reaction kettle, the reaction temperature is kept at 84-86° C.,...

Embodiment 3

[0047] Add 120kg deionized water, 10.8kg allyl alkyl sulfosuccinate M-12S, 2kg acrylamide to the pre-emulsification tank (A), then add 2.4kg methacrylic acid (AA), 55kg butyl acrylate (BA), 130kg methyl methacrylate (MMA) carry out high-speed dispersion, make pre-emulsion A.

[0048] Add 48.5kg deionized water, 2.34kg allyl alkyl sulfosuccinate M-12S, 1.04kg methacrylamide isopropyl sulfonic acid AMPS-2404, 1.2kg diacetone to the emulsification tank (B) Acrylamide (DAAM), 72.1kg isooctyl acrylate (2-EHA), 31.2kg methyl methacrylate (MMA), 0.78 methacrylic acid, 5.72kg γ-methacryloxypropyltrimethoxysilane ( A-174), make the shell layer pre-emulsion (B).

[0049] Add 304.2kg of deionized water and 4.2kg of allyl alkyl sulfosuccinate M-12S into the reaction kettle, then heat to 82-84°C, prepare 12.5kg of pre-emulsion (A) and 0.44 Add kg initiator sodium persulfate + 8.3kg deionized aqueous solution into the reactor, keep the reaction temperature at 84-86°C, and control the reac...

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Abstract

The invention discloses a preparation method of acrylic acid organic silicon soap-free copolymerization emulsion. Unsaturated monomers, organic silicon, a reactive emulsifier, an initiator and water are adopted as raw materials, temperature of a reaction kettle is controlled by virtue of core-shell polymerization and soap-free polymerization technologies, then treatment is carried out for removing residual monomers, and a neutralizing agent is added for neutralization, so that emulsion is obtained. By virtue of the soap-free polymerization technology, better water white resistance can be realized with less expensive organic silicon monomer, and water absorption of a paint film is reduced. By virtue of the core-shell polymerization technology, a core layer with high glass transition temperature and a shell layer with lower glass transition temperature are obtained, so that synthetic emulsion has lower film formation temperature under the condition that the average glass transition temperature is the same with a homopolymerization technology, usage amount of a coalescing agent is reduced, and influence of solvent volatilization on atmospheric environment is reduced. The acrylic acid organic silicon soap-free copolymerization emulsion product does not contain a free emulsifying agent, so that influence of the acrylic acid organic silicon soap-free copolymerization emulsion product on the environment is greatly reduced, and the acrylic acid organic silicon soap-free copolymerization emulsion product is environmentally friendly; and the acrylic acid organic silicon soap-free copolymerization emulsion has excellent weather resistance, water resistance and pollution resistance.

Description

technical field [0001] The invention relates to a preparation method of a polymer emulsion, in particular to a preparation method of an acrylic organosilicon soap-free copolymerization emulsion. Background technique [0002] The research and development of emulsion polymerization technology started in the early 20th century, and the emulsion polymerization technology similar to the current production formula appeared in the late 1920s. A more complete definition of emulsion polymerization can be considered as follows: emulsion polymerization is to generate isolated latex particles according to the mechanism of micelles or oligomers in the emulsion with water or other liquids as the medium, and carry out free radical addition polymerization or Ionic addition polymerization is a polymerization method to produce high polymers. [0003] The main characteristics of emulsion polymerization production: 1) fast polymerization speed and high molecular weight; 2) water as medium, low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/56C08F228/02C08F220/58C08F222/38C08F230/08
CPCC08F220/14C08F220/1804C08F220/06C08F220/56C08F228/02C08F220/585C08F222/385C08F220/1808C08F230/08
Inventor 唐冬勤叶洲
Owner 江苏三瑞生物技术有限公司
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