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Water-based modified acrylic anti-corrosive coating and preparation method thereof

An anti-corrosion coating, water-based modification technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of foaming, easy to block guns, and coarse latex particles.

Active Publication Date: 2019-05-21
MARINE CHEM RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application 201611142412.4 discloses a water-based asphalt coating for containers and its processing technology, aiming to solve the problem of poor bonding effect of water-based asphalt coatings for traditional containers; the key points of the technical solution include the following components: 8-12 parts of asphalt, 1.5-2.5 parts of stone powder, 1-2 parts of zinc phosphate, 10-18 parts of epoxy resin, 2-6 parts of alkyd resin, 1-4 parts of sodium methylcellulose, 1-2 parts of anionic emulsifier
[0005] Most of the existing water-based underframe paint base materials are asphalt emulsion as the main base material, which has the problems of coarse latex particles, poor stability, and easy to block the gun during construction
Due to the large content of emulsifiers, and the use of thickeners such as cellulose or bentonite, they tend to foam on the surface of water-based epoxy zinc-rich primers in humid environments; some are modified with epoxy resins, and have poor storage stability. , low-temperature brittleness; some have better resistance to salt spray, but contain heavy metal substances that are harmful to the environment

Method used

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  • Water-based modified acrylic anti-corrosive coating and preparation method thereof
  • Water-based modified acrylic anti-corrosive coating and preparation method thereof
  • Water-based modified acrylic anti-corrosive coating and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0081] 2. Preparation of protective glue:

[0082] The protective glue preparation formula is shown in Table 3. The properties of the protective glue are shown in Table 4.

[0083] table 3

[0084]

[0085]

[0086] Its preparation process is as follows:

[0087] ①Add propylene glycol methyl ether and dipropylene glycol methyl ether into a reaction vessel equipped with a stirrer, thermometer, condenser, and dropping tank, start stirring, blow nitrogen, raise the temperature to 115-125°C, and maintain a slight boiling state;

[0088] ②Mix acrylic acid, acrylate monomers (No. 2, 4) and styrene with initiator (No. 5), enter the high-level dropping tank, and drop them into the reaction vessel under the protection of nitrogen. The dropping time is about 2-3h, after the addition, keep it warm at 115-125°C for 1-2h.

[0089] ③ Cool down to 60-70°C, add neutralizer (No. 8-9). Gradually add water and stir to obtain a copolymer carboxylate colloidal solution, which is used as...

Embodiment 12

[0109] ① Add 75 grams of propylene glycol methyl ether and 75 grams of dipropylene glycol methyl ether into the reaction vessel, start stirring, blow nitrogen, raise the temperature to 115-125 ° C, and keep a slight boiling state;

[0110] ② Add 50 grams of acrylic acid, 75 grams of maleic anhydride, 75 grams of butyl acrylate, 75 grams of styrene, 100 grams of tertiary nonanoic acid vinyl ester (VeoVa9) and 10 grams of benzoyl peroxide, mix well, and enter the high-level drop Add tank, under the protection of nitrogen, add dropwise to the reaction vessel, the dropwise adding time is about 2-3h, after adding, keep warm at 115-125°C for 1-2h.

[0111] ③ Cool down to 60-70°C, add 100 grams of dimethylethanolamine. Gradually add water and stir to obtain unsaturated carboxylic acid copolymer amine salt dispersant.

[0112] 5. Preparation of coating:

[0113] The coating formula is shown in Table 7:

[0114] Table 7 Examples of paint formulations

[0115]

[0116] Preparatio...

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PUM

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Abstract

The invention discloses a water-based modified acrylic anti-corrosive coating and a preparation method thereof. The water-based modified acrylic anti-corrosive coating is prepared from the following raw materials in parts by weight: 250-400 parts of a core-shell structure acrylic emulsion, 100-250 parts of a soap-free acrylic emulsion, 30-150 parts of pigment, 100-300 parts of filler, 0-50 parts of color paste, 3-10 parts of a dispersing agent, 1-3 parts of a wetting gent, 1-3 parts of a defoaming agent, 5-15 parts of propylene glycol, 0.5-5 parts of multifunctional auxiliaries, 1-3 parts of amildew preservative, 1-3 parts of a preservative, 10-15 parts of a coalescing agent, 5-10 parts of a thickening agent, 1-2 parts of a neutralizer, 1-5 parts of a flatting agent, 5-15 parts of a flasherosion inhibitory agent, 150-200 parts of softened water. The coating disclosed by the invention is low in VOC content, free from benzene series, incombustible, low in smell and low in pollution; the construction can be performed by adopting brush-coating, roll-coating, airless spraying and like methods, the thick spraying is feasible, the drying is fast and the use is safe and convenient. The paint film is high in mechanical strength, strong in adhesive force and good in corrosion resistance.

Description

technical field [0001] The invention belongs to the field of water-based anti-corrosion coatings, in particular to a water-based modified acrylic anti-corrosion coating for container underframes and a preparation method thereof. Background technique [0002] Underframe paint is widely used in container manufacturing for container underframe protection. Traditional underframe paints are generally solvent-based paints, which cause serious environmental pollution and are prone to accidents such as fire and poisoning during construction. In 2017, the Container Industry Association promoted water-based coatings nationwide, so major domestic container manufacturers have an urgent need for environmentally friendly water-based underframe paints. [0003] Traditional underframe paints are mostly solvent-based asphalt paints, which are prepared with petroleum asphalt as the base material, fillers, No. 200 paint solvents, and additives. With its excellent performance and low price, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D5/08C09D7/61C09D7/63C08F220/18C08F220/14C08F212/08C08F220/06C08F212/36
Inventor 王晓侯佩民徐元浩姜信雨秦硕焕陈林
Owner MARINE CHEM RES INST
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