Environmentally-friendly air-drying water-based anti-corrosion coating
An anti-corrosion coating and air-drying technology, which is applied in the direction of anti-corrosion coatings and coatings, can solve the problems of strong product odor, many residual monomers, and low gloss of the paint film
Active Publication Date: 2018-01-09
MARINE CHEM RES INST CO LTD
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Problems solved by technology
The first disadvantage is that the acrylic acid and the alkyd are connected by an ester bond, and the storage stability is not ideal
Second, the particle size of the emulsion is large, and the gloss of the paint film is low
However, due to the inhibition of oleic acid to a certain extent, the reaction time in the free radical polymerization stage is longer, the residual monomers are more, and the product smells larger.
Method used
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[0064] Waterborne Alkyd Resin Synthesis
[0065] Effect of Acrylic (Ester) and Vinyl Monomer Amounts on Properties of Modified Alkyd Emulsion
[0066] Acrylic acid and vinylic monomers (hereinafter referred to as unsaturated monomers) are grafted with alkyd resins to form copolymers through free radical polymerization. The resin synthesis formulas with different amounts of unsaturated monomers are shown in Table 6.
[0067] Table 6 emulsion formula:
[0068]
[0069]
[0070] Emulsion properties are shown in Table 7
[0071] Table 7: The effect of the amount of unsaturated monomers on the properties of modified alkyd emulsions
[0072]
[0073] It can be seen from Table 7 that in the acrylic modified alkyd resin, it is necessary to introduce enough acrylate and vinyl monomers to form a sufficient shell to wrap the alkyd core and form a stable core-shell structure after self-emulsification. Microemulsion; if the unsaturated monomer is less than 20% of the total soli...
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Abstract
The invention relates to the field of anti-corrosion coatings, in particular to a preparation method of an environment-friendly air-drying water-based anti-corrosion coating. In the invention, partially unsaturated dibasic acid is used to replace saturated dibasic acid and vegetable oil, polyalcohol hydrolyzate is esterified to prepare alkyd resin, and then radical graft copolymerization is carried out with acrylic acid and vinyl monomer. The copolymer resin is neutralized with organic amine or ammonia water, and dispersed with water to obtain a core-shell structure emulsion. In this process, acrylic acid and vinylic monomers are grafted and copolymerized on the double bond of unsaturated dibasic acid, which has high grafting efficiency and small polymerization inhibition effect. Hydrolysis will occur. After the copolymer is self-emulsified by adding neutralizer and water, an emulsion with high mechanical stability and storage stability, uniform particle size and delicate appearance can be obtained. The emulsion is used as a base material to make a water-based anti-corrosion coating with pigments, fillers, additives, water, etc., which has low VOC content, little environmental pollution, and no fire and safety hazards.
Description
technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a preparation method of an environment-friendly air-drying water-based anti-corrosion coating. Background technique [0002] With its irreplaceable excellent characteristics, alkyd resin has always occupied a considerable proportion in the field of traditional coatings. With the continuous enhancement of people's awareness of environmental protection and the increasingly stringent national environmental protection regulations, the development of water-based alkyd paints that can replace solvent-based alkyd resin paints has always been a major effort in the coatings industry. The key to the research and development of water-based alkyd paint lies in the research and development of water-based alkyd resin. This has gone through the following three stages: The first stage is to emulsify the solvent-based alkyd resin with an emulsifier. Due to the influence of the added emuls...
Claims
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IPC IPC(8): C08F283/01C08F220/18C08F220/06C08F212/08C08F220/14C09D151/08C09D5/08
Inventor 侯佩民徐元浩王晓卢伟赵君于杰
Owner MARINE CHEM RES INST CO LTD