Metal-chelating water-based styrene-acrylic emulsion and preparation method thereof

A water-based styrene-acrylic emulsion and metal chelation technology, used in anti-corrosion coatings and other directions, can solve the problems of poor salt spray resistance, easy decomposition, secondary corrosion of metal surfaces, etc., to improve corrosion resistance and salt spray resistance, The effect of improving mechanical strength and excellent environmental performance

Inactive Publication Date: 2016-01-06
佛山市顺德区巴德富实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional water-based styrene-acrylic emulsion has two major technical defects
First, the water-based styrene-acrylic emulsion itself has a low binding force with metal materials, and has extremely high requirements on the surface quality of the metal. On some metal surfaces with rust stains, oxides, etc., the coating film of the styrene-acrylic emulsion is easy to appear. Peeling phenomenon
Therefore, users need to spend a lot of manpower and material resources to remove rust stains and oxides on the metal surface before applying the emulsion, which is very troublesome to use.
Second, the water-based styrene-acrylic emulsion itself has many hydrophilic groups, and its salt spray resistance is extremely poor. It is easy to decompose in places with high salt spray concentration, resulting in foaming and rusting. The traditional water-based styrene-acrylic emulsion The acrylic emulsion will foam or rust within 48-72 hours of salt spray spraying
The decomposition and rust of the emulsion will not only seriously affect the performance of the coating, but also cause secondary corrosion on the metal surface, greatly reducing the surface quality of the metal, and causing the coating film to peel off

Method used

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  • Metal-chelating water-based styrene-acrylic emulsion and preparation method thereof

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preparation example Construction

[0034] The preparation method of the aqueous styrene-acrylic emulsion of metal chelation of the present invention comprises the following steps:

[0035] (1), synthesis stage

[0036] A1: Preparation of pre-emulsion, add 35% formula water and 20% formula emulsifier into the pre-emulsification tank, turn on the mixer, and put in the formula styrene, butyl acrylate, isooctyl acrylate, Acrylic acid and chelating agent, stirring for 15-30 minutes;

[0037] B1: Add 65% of the formula amount of water and 80% of the formula amount of emulsifier into the reactor, stir evenly, and raise the temperature to 80-85°C;

[0038] C1: Continuously and evenly add the persulfate solution of the formula amount dropwise, after 3-8 minutes, continuously and evenly add the pre-emulsion obtained in the step A1, dropwise for 2-4 hours, after the dropwise addition, raise the temperature to 87-90°C, keep warm for 1 -2 hours;

[0039] (2), post-processing stage

[0040] A2: Cool down to 70-75°C;

[...

Embodiment 1

[0048] The water-based styrene-acrylic emulsion of metal chelation of the present invention comprises styrene, butyl acrylate, isooctyl acrylate, acrylic acid, ethylenediaminetetraacetic acid (EDTA), sodium dodecylbenzenesulfonate, potassium persulfate, peroxide Hydrogen, vitamin C and water. The contents of the above components are calculated by mass percentage: styrene 20%, butyl acrylate 10%, isooctyl acrylate 10%, acrylic acid 1%, ethylenediaminetetraacetic acid (EDTA) 5%, dodecylbenzenesulfonate Sodium persulfate 1%, potassium persulfate 0.3%, hydrogen peroxide 0.1-%, vitamin C 0.1%, and the balance is water.

[0049] The water-based styrene-acrylic emulsion preparation method of metal chelation of the present invention comprises the following steps:

[0050] (1), synthesis stage

[0051] A1: Preparation of pre-emulsion, add 35% formula water and 20% formula emulsifier into the pre-emulsification tank, turn on the mixer, and put in the formula styrene, butyl acrylate, i...

Embodiment 2

[0062] The water-based styrene-acrylic emulsion of metal chelation of the present invention comprises styrene, butyl acrylate, isooctyl acrylate, acrylic acid, ethylenediaminetetraacetic acid (EDTA), aminotriacetic acid, diethylenetriaminepentaacetic acid, maleic acid Anhydride, fumaric acid, citric acid (CA), tartaric acid (TA), gluconic acid (GA), hydroxyethylethylenediaminetriacetic acid (HEDTA), dihydroxyethylglycine (DEG), liquiritigenin, isoliquiritigenin , flavonol glycosides, kaempferol, caffeic acid, sodium dodecylbenzenesulfonate, potassium dodecylbenzenesulfonate, allyloxy fatty alcohol oxyethylene ether ammonium sulfate, allyloxy fatty alcohol oxygen Sodium Vinyl Ether Sulfate, Nonylphenol Ethoxylate, Potassium Persulfate, Ammonium Persulfate, Sodium Persulfate, Hydrogen Peroxide, Vitamin C and Water.

[0063] The contents of the above components are calculated by mass percentage: 25% styrene, 15% butyl acrylate, 15% isooctyl acrylate, 5% acrylic acid, 0.5% ethylen...

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Abstract

The invention discloses a metal-chelating water-based styrene-acrylic emulsion. The emulsion is characterized by comprising, in percentage by mass, 20%-25% of styrene, 10%-15% of butyl acrylate, 10%-15% of 2-ethylhexyl acrylate, 1%-5% of acrylic acid, 5%-10% of a chelating agent, 1%-5% of an emulsifier, 0.3%-0.6% of persulfate, 0.1%-0.3% of an oxidizing agent, 0.1%-0.3% of a reducing agent and the balance of water. The metal-chelating water-based styrene-acrylic emulsion has excellent anti-corrosion capacity and convenient to use during construction.

Description

technical field [0001] The invention relates to a water-based styrene-acrylic emulsion and a preparation method thereof, in particular to a corrosion-resistant metal-chelated water-based styrene-acrylic emulsion and a preparation method thereof. Background technique [0002] Water-based styrene-acrylic emulsion is currently a very widely used emulsion for architectural coatings, and is very popular among consumers for its excellent environmental protection performance, extremely low VOC content or even zero VOC. However, traditional water-based styrene-acrylic emulsions have two major technical defects. First, the water-based styrene-acrylic emulsion itself has a low binding force with metal materials, and has extremely high requirements on the surface quality of the metal. On some metal surfaces with rust stains, oxides, etc., the coating film of the styrene-acrylic emulsion is easy to appear. peeling phenomenon. Therefore, users need to spend a lot of manpower and mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F2/26C08F4/40C09D125/14C09D5/08
Inventor 何诚成煬霈罗云罗宇
Owner 佛山市顺德区巴德富实业有限公司
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