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Preparation method for anti-rust soap-free acrylate emulsion

An acrylate and anti-rust emulsion technology, which is applied in anti-corrosion coatings, coatings, etc., can solve the adverse effects of emulsion products on weather resistance, stain resistance, and water resistance. It is difficult to prevent oxygen and moisture from permeating, and polymer coatings Water resistance decline and other problems, to achieve the effect of excellent performance, excellent weather resistance, enhanced wettability and dispersibility

Active Publication Date: 2012-11-21
HUBEI EAST ST SPECIAL COATING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the emulsion polymerization is completed, the traditional emulsifier molecules participating in the reaction still exist in the emulsion in a free state. When the emulsion is dried and formed into a film, the emulsifier remains in the coating film, and itself has a hydrophilic group, making the polymer The water resistance of the coating film decreases, and it is unstable to heat, oxygen, light, and chemicals, which will have a negative impact on the weather resistance, stain resistance, and water resistance of the final emulsion product
The patent with the publication number CN101250365 (the patent application number is 200810024590.6) only introduces phosphate groups into the molecular structure of the polymer in order to form a dense phosphating film with the metal substrate, but the use of its traditional emulsifier will also affect the emulsion On the other hand, there are too few or no cross-linking monomers participating in the reaction, so it is impossible to form a dense coating film with a cross-linking network, it is difficult to prevent the penetration of oxygen and water, and it cannot achieve good anti-rust performance

Method used

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  • Preparation method for anti-rust soap-free acrylate emulsion
  • Preparation method for anti-rust soap-free acrylate emulsion
  • Preparation method for anti-rust soap-free acrylate emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of soap-free acrylate antirust emulsion, comprises the steps (pre-emulsification dropping monomer method):

[0037] 1) The composition and dosage of raw materials are as follows:

[0038]

[0039]

[0040] 2) Mix and dissolve 15.00g deionized water and 1.05g sodium vinyl sulfonate in a pre-emulsification tank, then slowly add the following three kinds under stirring: ① 23.30g methyl methacrylate, 18.00g butyl acrylate ester and 2.10g methacrylic acid, ②21.00g tertiary vinyl carbonate, ③1.40g methacrylic acid polyether phosphate, stirred for 10-15min to obtain monomer pre-emulsion, and set aside;

[0041] 3) add 53.00g deionized water, 0.35g remaining sodium vinyl sulfonate and 0.10g sodium bicarbonate (buffering agent ), stirring and heating up to 80-85°C to obtain the bottom material;

[0042] 4) Take 8.185g of monomer pre-emulsion and add it to the bottom material (that is, in the reactor), stir, add 0.06g of reaction initiator (prelimin...

Embodiment 2

[0054] The preparation method of soap-free acrylate antirust emulsion, comprises the steps (direct drop monomer method):

[0055] 1) The composition and dosage of raw materials are as follows:

[0056]

[0057] 2) Stir and mix 25.00g methyl methacrylate, 17.50g butyl acrylate, 2.10g methacrylic acid, 21.00g tertiary vinyl carbonate and 1.40g methacrylic acid polyether phosphate to prepare monomer mixture for later use;

[0058] 3) Add 68.00g deionized water, 1.40g sodium vinylsulfonate and 0.10g sodium bicarbonate (buffering agent) in the reactor (four-necked flask equipped with condenser, stirrer, thermometer, dropping funnel), Stir and heat up to 80-85°C to obtain the base material;

[0059] 4) Take 6.7g of the monomer mixture and add it to the bottom material (that is, in the reactor), stir, add 0.06g of reaction initiator (preliminary addition of reaction initiator); add 13.00g of deionized water to the remaining 0.21g of reaction initiator Make up the remaining react...

Embodiment 3

[0070] The preparation method of soap-free acrylate antirust emulsion, comprises the steps:

[0071] The composition and consumption of raw materials are as follows:

[0072]

[0073] Concrete steps and process are with embodiment 1.

[0074] Product technical indicators:

[0075] Appearance: milky white, blue light is obvious, emulsion is clear

[0076] Solid content: 45.5%

[0077] Dosage of reactive emulsifier (total amount of monomer): 3%

[0078] Vinyl tert-carbonate content (total amount of monomer): 25%

[0079] Phosphate content (total amount of monomers): 5%.

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Abstract

The invention relates to a preparation method for a base material of an anti-rust coating. The preparation method for an anti-rust soap-free acrylate emulsion is characterized in that a reactive emulsifier is selected, a polymeric monomer comprises (methyl) acrylic acid and an acrylic monomer thereof, a versatic acid vinyl monomer and a crosslinking monomer, a phosphate monomer is taken as a modified monomer, and the emulsion polymerization is carried out through semi-continue process under the action of an initiator, so that the soap-free anti-rust acrylate emulsion adopting water as dispersive medium is synthesized. The preparation method for the anti-rust soap-free acrylate emulsion can not only meet the requirement of environmental protection, but also enhance the rust resistance.

Description

technical field [0001] The invention relates to a preparation method of a base material of an antirust paint, in particular to a preparation method of a soap-free acrylate antirust emulsion. The antirust emulsion can be widely used on various metal substrates for protection. Background technique [0002] At present, in the field of antirust coatings, solvent-based coatings are still the mainstay, but because the solvents of the coatings are volatile, they pollute the environment and harm human health. At the same time, there are safety hazards such as flammability and explosion in construction, storage, and transportation. Water-based anti-rust coatings have the advantages of non-toxic, odorless, non-combustible, less pollution, weather aging resistance, and light aging resistance. However, when water is used instead of valuable organic solvents, various coating properties of water-based coatings are reduced, especially the anti-rust performance is difficult to compare with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F220/14C08F220/18C08F220/32C08F220/06C08F228/02C08F218/04C08F230/08C08F2/24C09D151/08C09D5/08
Inventor 闫福安张洁
Owner HUBEI EAST ST SPECIAL COATING TECH
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