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A high-efficiency antibacterial and aldehyde-removing composite additive and its preparation method and application

A compound additive and high-efficiency technology, applied in paints, coatings, anti-fouling/underwater coatings containing biocides, etc., can solve the problems of poor aging resistance of paint films, increased costs, and formation of catalytic sites, etc., to achieve good Anti-aging effect, inhibition of catalytic degradation, effect of increasing catalytic degradation

Active Publication Date: 2022-01-11
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Since titanium dioxide is directly mixed with other components, after drying and forming a film, many titanium dioxide nanoparticles are wrapped, and catalytic sites cannot be formed on the coating surface. Under the premise of achieving the same catalytic efficiency, more titanium dioxide needs to be added , resulting in increased cost
[0007] 2. Titanium dioxide generates free radicals under the excitation of visible light to catalyze the degradation of solid or gas pollution sources, and this degradation is not selective. When titanium dioxide is in direct contact with organic resins, it will also actively degrade the organic matrix, resulting in coatings The pulverization of titanium dioxide nanoparticles and the release of titanium dioxide nanoparticles are harmful to human health
[0008] To sum up, the cold blending of anatase nano-titanium dioxide in the paint formula causes most of the active ingredients to be embedded in the paint film, which cannot maximize its visible light catalysis and antibacterial and aldehyde removal functions;
[0009] The added anatase nano-titanium dioxide is in direct contact with the paint film after film formation, and the free radicals generated under visible light degrade the organic resin non-selectively, resulting in poor aging resistance of the paint film

Method used

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  • A high-efficiency antibacterial and aldehyde-removing composite additive and its preparation method and application

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Embodiment approach 1

[0054] The present invention is applied to materials such as coatings, and titanium dioxide as an additive can be more exposed to the air to improve its catalytic efficiency. Embodiments are provided to provide a high-efficiency antibacterial and aldehyde-removing composite additive, which is a composite particle.

[0055] Composite particles are mainly composed of acrylic acid particles and silica particles, the silica particles are loaded with titanium dioxide, and acrylic acid particles are mainly polymerized from acrylic monomers;

[0056] The key point of this embodiment lies in the poor hydrophilicity of the acrylic particles and the good hydrophilicity of the silica particles, so that the composite particles have a function similar to that of a giant surfactant. And the silica particle end of the supported titanium dioxide tends to migrate to the gas-liquid surface, so that the active component titanium dioxide is more exposed to the air after film formation, thereby imp...

Embodiment approach 2

[0066] The embodiment of the present invention specifically provides a preparation method of a high-efficiency antibacterial and aldehyde-removing composite additive in the embodiment, which includes the following steps: the surface of the acrylic acid particles coated with organic silicon is subjected to monomer swelling, After the method of synthetic treatment, add titanium dioxide to absorb and obtain the composite additive.

[0067] It also includes the steps of:

[0068] Synthesis of acrylic particles coated with silicone on the surface of S1:

[0069] S11 Stir and mix water, S25, FSL 707, acrylic acid, methyl methacrylate and butyl acrylate to obtain the first pre-emulsion;

[0070] S12 Mix water, S25, FSL 707, N-10, acrylic acid, VeoVa10, silicone monomer KH570, methyl methacrylate, butyl acrylate and isooctyl acrylate to obtain the second pre-emulsion;

[0071] S13 Stir and mix water, sodium bicarbonate, S25, and FSL 707, add the first pre-emulsion and ammonium pers...

Embodiment approach 3

[0080] This embodiment also provides the application of the above-mentioned high-efficiency antibacterial and aldehyde-removing compound additive in interior wall paint, and the addition amount of the high-efficiency antibacterial and aldehyde-removing compound additive in the interior wall paint is more than 0.05%.

[0081] It includes the following components by weight:

[0082] 10-20 parts of pure acrylic emulsion;

[0083] 30-50 parts of water;

[0084] High-efficiency antibacterial and aldehyde-removing composite additive 0.1 part;

[0085] 0.1-1 part of pH regulator;

[0086] Coalescing aid 0.5-2 parts.

[0087] Optionally, it also includes more than one of the following components in the following parts by weight:

[0088] Thickener 0.5-2 parts;

[0089] 0.5-2 parts of wetting and dispersing agent;

[0090] 0.1-1 part of defoamer;

[0091] 0.1-1 part of pH regulator;

[0092] 30-60 parts of pigments and fillers;

[0093] Antiseptic bactericide 0.1-1 part.

[0...

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Abstract

The invention relates to the technical field of aldehyde-removing composite additives, in particular to a high-efficiency antibacterial and aldehyde-removing composite additive and its preparation method and application. Among them, the composite particles are mainly formed by connecting acrylic acid particles and silicon dioxide particles, the silicon dioxide particles are loaded with titanium dioxide, and the acrylic acid particles are mainly formed by polymerizing acrylic monomers. The surface of the acrylic particles coated with organic silicon is sequentially processed by monomer swelling and synthetic method, and titanium dioxide is added for adsorption to obtain the composite additive. The beneficial effect is that when a small amount of additive is added to the paint, it can achieve a higher rate of aldehyde removal, and the paint has high aging resistance and thermal stability.

Description

technical field [0001] The invention relates to the technical field of aldehyde-removing composite additives, in particular to a high-efficiency antibacterial and aldehyde-removing composite additive and its preparation method and application. Background technique [0002] In the prior art, the general method of coatings with antibacterial, aldehyde-removing and self-catalytic functions is to add additives with related functions in the formula. In terms of inorganic materials, anatase nano-titanium dioxide is generally selected. The main implementation is cold blending, that is, titanium dioxide and emulsion and other powders and additives for direct mixing. [0003] In the patent CN106978029, it is disclosed that a bismuth oxyhalide catalytic powder and titanium dioxide sol are added to the coating at the same time to prepare a self-cleaning coating for exterior walls. This method greatly increases the catalytic efficiency due to the composite action of the two particles, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/14C09D7/65C09D7/61C09D7/62C09D133/04
CPCC09D5/14C09D7/65C09D7/61C09D7/62C09D7/70C09D133/04C08K2003/2241C08L2205/02C08L2205/14C08L33/12C08K13/06C08K9/10C08K9/12C08K3/36C08K3/22C08L33/08
Inventor 李维亚强志华姜美佳付绍祥洪杰
Owner SKSHU PAINT
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