WO2021135722A1

WO2021135722A1 - Coating having sterilization function and preparation method therefor and application thereof

Info

Publication number: WO2021135722A1
Application number: PCT/CN2020/130861
Authority: WO
Inventors: 洪杰; 黄敏阳; 杨泽生; 王志银; 陈辉
Original assignee: 安徽三棵树涂料有限公司
Priority date: 2019-12-31
Filing date: 2020-11-23
Publication date: 2021-07-08
Also published as: CN111171652A

Abstract

A coating having a sterilization function and a preparation method therefor and an application thereof. The coating is mainly prepared from the following components: an acrylic resin, a dispersant, a defoamer, XillaMaya powder, color changing powder, a chloroether resin, a leveling agent, a Korean pine essential oil, a tea polyphenol, and an environmentally friendly solvent, with an HDI curing agent being used in combination. The coating overcomes the shortcomings that no sterilizing agent is added to existing photochromic coatings having a sterilization function, or a wooden article cannot provide a long-lasting antibacterial effect after the coating forms a film even after a sterilizing agent is added. Due to the addition of a Korean pine essential oil, a tea polyphenol, a chloroether resin, XillaMaya powder, and color changing powder, the photochromic coating having a sterilization function can not only kill bacteria inside the wood in the interior decoration to which the coating is applied, remove interior bacteria, and can also change different colors under lighting conditions, making original monotonous colors richer.

Description

Paint with bactericidal function and preparation method and application thereof

Technical field

The invention relates to a paint, in particular to a paint with a sterilization function, and a preparation method and application thereof.

Background technique

In recent years, as people's attention to the living environment has increased, more and more attention has been paid to the environmental protection and color properties of the coatings used in decoration, and the requirements for the functionality of traditional coatings have become higher and higher.

In the Chinese patent with publication number CN109181519A, a water-based UV coating and its preparation method and application process are disclosed, which discloses the use of tea polyphenols, aloe extract, spider plant extract, and agave extract in water-based coatings. It is the main formaldehyde trapping agent, and it cooperates with the effective functional groups in lemongrass essential oil, lavender essential oil, and eucalyptus essential oil to carry out oxidative decomposition and molecular complexation with formaldehyde to reduce the formaldehyde content in the air. The formaldehyde removal effect is good. The special fragrance of lavender essential oil and eucalyptus essential oil is used to mask the pungent smell of formaldehyde and create a fragrance environment. However, this coating does not mention whether it has the function of sterilizing the coating object, and it exists in the form of microcapsules, which limits the space for sterilization.

Summary of the invention

(1) Technical problems to be solved

In order to solve the above-mentioned problems of the prior art, the present invention provides a coating that enables the combination of tea polyphenols and Korean pine essential oil to exert a strong bactericidal function;

Correspondingly, the present invention also provides a method for preparing a coating that enables the combination of tea polyphenols and Korean pine essential oil to exert a strong bactericidal function.

Correspondingly, the present invention also provides the application of a coating that enables the combination of tea polyphenols and Korean pine essential oil to exert a strong bactericidal function in wood or wood products.

(2) Technical solution

In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

A paint with bactericidal function, which comprises the following components: Korean pine essential oil, tea polyphenols and film-forming substances.

Further, it also includes one or more of the following components: curing agent, dispersant, defoaming agent, leveling agent, solvent and chloroether resin.

Further, the components are respectively 0.5-2 parts by weight of Korean pine essential oil, 0.1-1 parts of tea polyphenols, and 50-80 parts of film-forming substances.

Furthermore, it also includes the following components in parts by weight: 2-16 parts of the color-changing combination powder, which is mainly composed of 1-8 parts by weight of Syramaya powder and 1-8 parts by weight of the color-changing powder.

Further, according to parts by weight, it also includes one or more of the following components: 15-25 parts of curing agent, 0.1-1 part of dispersant, 0.1-1 part of defoaming agent, 0.05-0.5 part of leveling agent, 10-20 parts of solvent and 1-8 parts of chloroether resin.

Further, the film-forming substance is acrylic resin,

or

The defoamer is one or a mixture of modified polysiloxane defoamers and modified silicone defoamers;

or

The leveling agent is one or a mixture of organic silicon leveling agents and acrylic leveling agents;

or

The solvent is a mixture of two or more of isobutyl isobutyrate, dimethyl carbonate, and mixed dibasic acid esters;

or

The curing agent is a 90% solid content HDI trimer curing agent.

The present invention provides a method for preparing a paint with a sterilization function, which includes the following steps in sequence: adding a red pine essential oil, tea polyphenols and a solvent to a film-forming substance at a rotation speed of 400-800 rpm, and then adjusting the rotation speed Disperse for 10-15 minutes to 600-800 revolutions/minute to obtain paint.

The present invention provides another method for preparing a coating with sterilization function, which includes the following steps in sequence:

S1 First mixing: Add dispersant and defoamer to the film-forming material, and disperse for 5-8 minutes at a speed of 600-800 rpm to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 600-800 rpm, and adjust the rotation speed to 800-1000 rpm and disperse for 10-15 minutes to obtain a second mixture. material;

S3 third mixing: the second mixture material is added at 400～800 rpm, after adding chloroether resin, leveling agent, Korean pine essential oil, tea polyphenol and solvent, adjust the rotation speed to 600～800 rpm to disperse 10-15 minutes to obtain the paint.

Further, it also includes step S4, filtering the paint obtained in step S3 through an 80-mesh filter.

The present invention provides the application of coatings with sterilization function in wood or wood products in any of the above solutions.

(3) Beneficial effects

The beneficial effects of the present invention are:

1. The present invention uses the combination of Korean pine essential oil and tea polyphenols as a bactericide in the coating, so that it has a strong bactericidal function, especially when applied to the surface of wooden materials, which can realize the bactericidal function from the inside to the outside of the wooden material. Extending the shelf life of wooden materials, it can also have a sterilizing effect on the room in the application scene, and play a role in purifying the air.

2. The invention also adds Shiramaya powder and color-changing powder to make the paint last for a long time after forming a film, and it can also change different colors under light conditions, so that the original monotonous color becomes more abundant.

3. The present invention adopts step-by-step and different dispersion speed control, which can effectively realize the full fusion of the components. After step S1 and step S2, the main materials of the main paint are fully mixed, and then the Korean pine essential oil is added in step S3 With tea polyphenols and other substances, the Korean pine essential oil and tea polyphenols can be better and more stably integrated with the main material in the solvent and at a lower dispersion speed.

4. The photochromic paint with sterilization function prepared by the present invention is more environmentally friendly and is an environment-friendly paint.

Detailed ways

In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments.

The present invention provides a coating with bactericidal function, which comprises the following components: Korean pine essential oil, tea polyphenols and film-forming substances.

Tea polyphenols is the general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols and phenolic acids.

Korean pine essential oil is a plant essential oil extracted from the Korean pine tree, which is available on the market. Studies have found that the combination of tea polyphenols and Korean pine essential oil in paint has a good antibacterial effect. It can kill Clostridium botulinum and its spores and inhibit the activity of bacterial exotoxins.

The paint made of tea polyphenols and Korean pine essential oil of the present invention has a strong bactericidal effect, has a bactericidal effect on the painted object and the space where it is located, can prolong the antibacterial time of the painted object, thereby prolonging the shelf life, and by Sterilization in the air of the space has the effect of air purification. In particular, it can kill bacteria inside the wood used, and can play a long-term sterilization effect after the photochromic paint with sterilization function is formed into a film, thereby killing indoor bacteria and purifying the air. The photochromic paint with sterilization function can be directly brushed to facilitate the construction. And play its comprehensive effect to improve the film-forming effect of the photochromic paint with sterilization function.

Further, it also includes Shiramaya powder and color changing powder.

By adding Shiramaya powder and color-changing powder, the paint can not only kill the bacteria inside the wood in the interior decoration of the paint, remove the bacteria in the room, play a role in purifying the air, but also change different colors under light conditions. , Which makes the original monotonous color richer.

Among them, Shiramaya powder is a special aluminosilicate flake material as the base material, and adopts a variety of oxide superimposed coating processes. Its particle size is 8-30 microns, and under the action of light, it presents a pearlescent three-dimensional visual effect. Powder; the color-changing powder is preferably chameleon pearl powder with a particle size of 15-60 microns. The color-changing powder may also be a temperature-sensitive color-changing powder.

In addition, experiments have shown that when Shiramaya powder and chameleon pearl powder are added, the antiseptic effect of the coating is better. This may be due to the combination of color-changing powder and Syramaya powder, which makes the light show different light colors after being refracted at different angles. The effective active groups of tea polyphenols and Korean pine essential oil are excited under different light colors. It can produce different vigor, so as to achieve killing power to different bacteria at the same time; but other reasons are not excluded.

The invention uses curing agents, dispersants, defoamers, leveling agents, solvents and chloroether resins to ensure that tea polyphenols, Korean pine essential oil, Syramaya powder and chameleon pearl powder can perform sterilization functions and light color change functions. stability.

Experiments have shown that the red essential oil, tea polyphenols and film-forming substances have the best antibacterial effect in the above ratio range.

The present invention adds Syramaya powder and color changing powder in the above ratio, so that the coating has the best sterilization function and can change different colors under light conditions.

Further, the film-forming material is acrylic resin, and the acrylic resin is a high solids (solids=80%) low-viscosity hydroxyl (hydroxyl value=70) acrylic polyol resin. Acrylic resin is a powdery substance available on the market.

Further, the defoaming agent is one or a mixture of modified polysiloxane defoamers and modified silicone defoamers;

Further, the leveling agent is one or a mixture of silicone leveling agents and acrylate leveling agents; it can promote the formation of a smooth, smooth and uniform coating film during the drying and film forming process of the coating. . The use of the above-mentioned leveling agent enables the photochromic paint with sterilization function to have better fluidity and facilitate the construction.

Further, the solvent is a mixture of two or more of isobutyl isobutyrate, dimethyl carbonate, and mixed dibasic acid esters; the combination of these solvents has better solubility properties, can reduce the use of solvents, and more Environmental protection.

Further, the curing agent is an HDI trimer curing agent with a solid content of 90%.

Further, the dispersant is a medium to high molecular weight copolymer high wetting dispersant, the materials can be well dispersed, and the uniformity of the prepared photochromic coating with sterilization function is ensured.

S1 First mixing: Add dispersant and defoamer to the film-forming substance, and disperse at 600-800 rpm for 5-8 minutes and mix uniformly to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 600-800 rpm, and adjust the rotation speed to 800-1000 rpm and disperse for 10-15 minutes until the fineness is less than 55μm to obtain the second mixture material;

The present invention adopts step-by-step and different dispersion speed control, which can effectively realize the full integration of the components. After step S1 and step S2, the main materials of the main paint are fully mixed, and then the Korean pine essential oil and tea are added in step S3. Polyphenols and other substances enable Korean pine essential oil and tea polyphenols to be better and more stable with the main material in the solvent and at a lower dispersion speed.

The invention makes full use of the bactericidal and antibacterial effects of Korean pine essential oil and tea polyphenols, and adds them to the photochromic coating with sterilization function, which effectively improves the effect of the photochromic coating with sterilization function on the applied wood. The sterilization effect and the antibacterial effect on the surrounding environment can achieve long-term sterilization and antibacterial;

The paint prepared by the invention is an environmentally friendly, natural, and environment-friendly photochromic paint with bactericidal function.

The paint in any of the above schemes has a sterilization function. When in use, the paint can be directly painted on wood or wooden products, which is convenient for construction. The application of tea polyphenols and Korean pine essential oil on wood or wood products has a more bactericidal effect than other materials.

The source of each component in the present invention can be in the following ways:

The tea polyphenol is preferably the tea polyphenol produced by Shaanxi Senlang Biochemical Co., Ltd., which is food-grade, with a content of about 98%;

Acrylic resin is preferably 73006-s-80 produced by Changxing Material Industry Co., Ltd.;

The dispersant is BYK-161 produced by BYK Chemicals;

Shiramaya powder is selected from the Shiramaya powder produced by Kuncai Technology;

The color-changing powder is selected from Kuncai Technology Chameleon series pearl powder;

The chloroether resin is preferably MP-45 produced by BASF Chemical;

Korean pine essential oil is selected from Jilin Painuo Biological Company's Korean pine tower essential oil;

HDI curing agent is N3390 produced by Covestro;

The other components are all commonly used raw materials on the market.

Specific embodiment

Example 1

A photochromic coating with sterilization function, which includes the following components in parts by weight:

The above-mentioned components are prepared into a photochromic paint with bactericidal function according to the following preparation method:

S1 First mixing: Add dispersant and modified polysiloxane defoamer to the film-forming material, and disperse at 700 rpm for 7 minutes and mix uniformly to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a speed of 700 revolutions/min, and adjust the speed to 900 revolutions/min. Disperse for 13 minutes until the fineness is less than 55 μm to obtain the second mixture. ；

S3 third mixing: the second mixture is added with chloroether resin, silicone leveling agent, Korean pine essential oil, tea polyphenols, isobutyl isobutyrate and dimethyl carbonate at 900 rpm , Adjust the rotation speed to 700 revolutions/min and disperse for 13 minutes to obtain the third mixture material.

S4 filters the third mixture through an 80-mesh filter to obtain a photochromic paint with sterilization function.

Example 2

S1 First mixing: Add dispersant and modified silicone defoamer to the film-forming material, disperse for 8 minutes at a rotation speed of 600 rpm, and mix uniformly to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 600 rpm, and adjust the rotation speed to 1000 rpm and disperse for 13 minutes until the fineness is less than 55 μm to obtain the second mixture. ；

S3 Third mixing: Add chloroether resin, acrylate leveling agent, Korean pine essential oil, tea polyphenols, isobutyl isobutyrate, dimethyl carbonate and After mixing the dibasic acid ester, adjust the rotation speed to 600 revolutions/min and disperse for 15 minutes to obtain the third mixture material.

Example 3

S1 First mixing: Add dispersant, modified polysiloxane defoamer and modified silicone defoamer to the film-forming substance, and disperse at 800 rpm for 5 minutes and mix uniformly to obtain the first Mixed material

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 800 rpm, and adjust the rotation speed to 1000 rpm and disperse for 10-15 minutes until the fineness is less than 55 μm to obtain the second Mixed material

S3 Third mixing: Add chloroether resin, silicone leveling agent, acrylic leveling agent, Korean pine essential oil, tea polyphenols, dimethyl carbonate and After mixing the dibasic acid ester, adjust the rotation speed to 700 revolutions/min and disperse for 15 minutes to obtain the third mixture material.

Example 4

S1 First mixing: Add dispersant and defoamer to the film-forming material, and disperse for 5 minutes at a speed of 700 revolutions per minute to mix uniformly to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 600 rpm, and adjust the rotation speed to 900 rpm and disperse for 1 minute until the fineness is less than 55 μm to obtain the second mixture. ；

S3 Third mixing: Add chloroether resin, silicone leveling agent, acrylic leveling agent, Korean pine essential oil, tea polyphenols, isobutyl isobutyrate to the second mixture at a speed of 500 rpm After the ester and the mixed dibasic acid ester are mixed, the rotation speed is adjusted to 800 rpm and dispersed for 10 minutes to obtain the third mixture material.

Example 5

S1 First mixing: Add dispersant and defoamer to the film-forming material, disperse for 5 minutes at a rotation speed of 600 rpm and mix uniformly to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 600 rpm, and adjust the rotation speed to 800 rpm and disperse for 10 minutes until the fineness is less than 55 μm to obtain the second mixture. ；

S3 third mixing: the second mixture is added with chloroether resin, acrylate leveling agent, Korean pine essential oil, tea polyphenols, isobutyl isobutyrate and dimethyl carbonate at 400 rpm , Adjust the rotation speed to 600 revolutions/min and disperse for 10 minutes to obtain the third mixture material.

Example 6

S1 First mixing: Add dispersant, modified polysiloxane defoamer and modified polysilicone defoamer to the film-forming substance, and disperse at 800 rpm for 8 minutes and mix uniformly to obtain the first mixture material;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 800 rpm, and adjust the rotation speed to 1000 rpm and disperse for 15 minutes until the fineness is less than 55 μm to obtain the second mixture. ；

S3 Third mixing: Add chloroether resin, silicone leveling agent, Korean pine essential oil, tea polyphenols, isobutyl isobutyrate, dimethyl carbonate and After mixing the dibasic acid ester, adjust the rotation speed to 800 revolutions/min and disperse for 15 minutes to obtain the third mixture material.

Example 7

S1 First mixing: Add dispersant, modified polysiloxane defoamer and modified polysilicone defoamer to the film-forming substance, and disperse at 600 rpm for 8 minutes and mix uniformly to obtain the first mixture material;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a speed of 700 revolutions/min, and adjust the speed to 800 revolutions/min. Disperse for 15 minutes until the fineness is less than 55 μm to obtain the second mixture. ；

S3 Third mixing: Add chloroether resin, leveling agent, Korean pine essential oil, tea polyphenols and solvent to isobutyl isobutyrate, dimethyl carbonate, and mix the second mixture material at a speed of 600 rpm. After mixing the dibasic acid ester, adjust the rotation speed to 600 revolutions/min and disperse for 15 minutes to obtain the third mixture material.

The construction method of the coatings of the examples 1-7 of the present invention is as follows: first apply three-tree European-style white paint for 2-3 times on the ash wooden board, and apply a sterilizing light can be applied after it has dried for 24 hours. Color-changing paint to obtain a uniformly colored coating.

Comparative example 1:

Others are the same as in Example 7, but the difference is that Syramaya powder and discoloration powder are not added to the coating.

Comparative example 2:

A water-based UV coating prepared according to the Chinese patent with publication number CN109181519A.

Comparative example 3:

Others are the same as in Example 7, but the difference is that the red pine essential oil and tea polyphenols are not added to the coating.

Comparative example 4:

Others are the same as in Example 7, but the difference is that the red pine essential oil in the coating is replaced with the same weight of tea polyphenols.

Experimental data:

The coatings of Examples 1-7, Comparative Example 1 and Comparative Example 2 were evenly brushed in a sealed space of 10 square meters according to the above method, and tested using the GB/T 21866-2008 antibacterial coating (paint film) antibacterial property test method .

The results show that the total number of colonies in the space before coating is 34000000cfu/m ³ , and the total number of colonies in the surrounding space 24 hours after the use of the photochromic coating with sterilization function described in Examples 1-4 is as follows, the following data are all The average result of valid experimental data.

具有杀菌功能的光可变色涂料Photochromic paint with sterilization function	空间内的菌落数(cfu/m ³) Number of colonies in the space (cfu/m ³ )
实施例1Example 1	86008600

实施例2Example 2	75007500
实施例3Example 3	69006900
实施例4Example 4	77007700
实施例5Example 5	65006500
实施例6Example 6	68006800
实施例7Example 7	72007200
对比例1Comparative example 1	1000010000
对比例2Comparative example 2	6800068000
对比例3Comparative example 3	260000260000
对比例4Comparative example 4	2100021000

It can be seen from the above table that the specific examples 1-7 and comparative example 1 of the present invention have very good antibacterial and bactericidal effects. Shiramaya powder and color-changing powder can improve the sterilization effect of red pine essential oil and tea polyphenols in the paint. The synergistic bactericidal effect of Korean pine essential oil and tea polyphenols in the present invention is stronger than the effect of only adding tea polyphenols. The bactericidal effect of the coating of the present invention is significantly greater than that of the water-based UV coating prepared in the Chinese Patent Publication No. CN109181519A.

The photochromic paint with bactericidal function and the preparation method thereof of the present invention are not limited to the above-mentioned embodiments. Any improvement or replacement based on the principle of the present invention should fall within the protection scope of the present invention.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A paint with bactericidal function, which is characterized in that it comprises the following components: Korean pine essential oil, tea polyphenols and film-forming substances.
The coating with bactericidal function according to claim 1, characterized in that it further comprises the following components: color-changing combination powder.
The coating with bactericidal function according to claim 1, characterized in that it further comprises one or more of the following components: curing agent, dispersant, defoamer, leveling agent, solvent and chloroether resin.
The paint with bactericidal function according to claim 1, wherein the components are respectively 0.5-2 parts by weight of Korean pine essential oil, 0.1-1 part of tea polyphenol and 50-80 parts of film-forming substance.
The coating with bactericidal function according to claim 4, characterized in that it further comprises the following components by weight: 2-16 parts of color-changing combination powder, said color-changing combination powder is mainly composed of 1-8 parts by weight of Syramaya Powder and 1-8 parts by weight of color-changing powder are mixed.
The coating with bactericidal function according to claim 4, characterized in that, by weight, it also comprises one or more of the following components: 15-25 parts of curing agent, 0.1-1 part of dispersant, defoaming 0.1 to 1 part of agent, 0.05 to 0.5 part of leveling agent, 10 to 20 parts of solvent and 1 to 8 parts of chloroether resin.
The coating with sterilization function according to claim 3, characterized in that:

The film-forming substance is acrylic resin,

or

The defoamer is one or a mixture of modified polysiloxane defoamers and modified silicone defoamers;

or

The leveling agent is one or a mixture of two of silicone-based leveling agents and acrylate-based leveling agents;

or

The solvent is a mixture of more than two of isobutyl isobutyrate, dimethyl carbonate, and mixed dibasic acid esters;

or

The curing agent is an HDI trimer curing agent with a solid content of 90%.
The method for preparing a coating with a sterilization function according to claim 1, characterized in that it comprises the following steps in sequence: adding the red pine essential oil and tea polyphenols to the film-forming substance at a speed of 400-800 revolutions per minute. After mixing with the solvent, the rotation speed is adjusted to 600-800 revolutions per minute and dispersed for 10-15 minutes to obtain the coating.
The preparation method of the coating with sterilization function according to claim 3, characterized in that it comprises the following steps in sequence:

S1 First mixing: Add dispersant and defoamer to the film-forming material, and disperse for 5-8 minutes at a speed of 600-800 rpm to obtain the first mixture;

S2 Second mixing: Add Syramaya powder and color-changing powder to the first mixture at a rotation speed of 600-800 rpm, and adjust the rotation speed to 800-1000 rpm and disperse for 10-15 minutes to obtain a second mixture. material;

S3 third mixing: the second mixture material is added at 400～800 rpm, after adding chloroether resin, leveling agent, Korean pine essential oil, tea polyphenol and solvent, adjust the rotation speed to 600～800 rpm to disperse 10-15 minutes to obtain the coating.
The application of the coating with bactericidal function according to any one of claims 1-9 in wood or wood products.