阅读说明：本技术 一种除甲醛涂料及其制备方法 (Formaldehyde removal coating and preparation method thereof ) 是由 王霞 邢净 肖文韬 陈红霞 魏红岩 张晓菲 冉秀云 于 2019-01-30 设计创作，主要内容包括：本申请公开一种除甲醛涂料,按重量份计,包含：水26～30份、填料22～32份、沸石5～20份、甲醛消除剂1～2份、硅藻土负载纳米TiO<Sub>2</Sub>1～5份、颜料12～20份、分散剂0.8～1.2份,润湿剂0.2～0.3份、防冻剂0.5～1份、增稠剂0.8～1.1份、消泡剂0.6～0.7份、pH调节剂0.2～0.4份、乳液15～30份、成膜助剂0.7～1份、防霉剂0.1～0.2份。本申请还提供所述除甲醛涂料的制备方法。所述除甲醛涂料的甲醛净化效果提高,同时保持较好的漆膜性能。(The application discloses remove formaldehyde coating contains according to parts by weight: 26-30 parts of water, 22-32 parts of filler, 5-20 parts of zeolite, 1-2 parts of formaldehyde remover and diatomite-loaded nano TiO 2 1-5 parts of pigment, 12-20 parts of dispersing agent, 0.8-1.2 parts of wetting agent, 0.2-0.3 part of antifreezing agent, 0.8-1.1 parts of thickening agent, 0.6-0.7 part of defoaming agent, 0.2-0.4 part of pH regulator, 15-30 parts of emulsion, 0.7-1 part of film-forming assistant and 0.1-0.2 part of mildew preventive. The application also provides a preparation method of the formaldehyde-removing coating. The formaldehyde removing coating has the advantages that the formaldehyde purifying effect is improved, and meanwhile, the good performance of the paint film is kept.)

1. The formaldehyde-removing coating comprises the following components in parts by weight: 26-30 parts of water, 22-32 parts of filler, 5-20 parts of zeolite, 1-2 parts of formaldehyde remover and diatomite-loaded nano TiO₂1-5 parts of pigment, 12-20 parts of dispersing agent, 0.8-1.2 parts of wetting agent, 0.2-0.3 part of antifreezing agent, 0.8-1.1 parts of thickening agent, 0.6-0.7 part of defoaming agent, 0.2-0.4 part of pH regulator, 15-30 parts of emulsion, 0.7-1 part of film-forming assistant and 0.1-0.2 part of mildew preventive.

2. The formaldehyde-removing coating according to claim 1, wherein the zeolite has a specific surface area of 800m²/g～1000m²/g。

3. The formaldehyde-removing coating according to claim 1, wherein the formaldehyde scavenger is an amine compound selected from any one or more of acrylamide, urea, melamine, and dicyandiamide.

4. The formaldehyde-removing coating according to claim 1, wherein the diatomite is loaded with nano TiO₂Of TiO2₂35 to 40 weight percent of load and TiO₂The average grain size is 11 to 12 nm.

5. The method for preparing the formaldehyde-removing coating of claim 1, comprising:

(1) sequentially adding water, a filler, a pigment, a dispersing agent, a wetting agent, an antifreezing agent, a thickening agent, a defoaming agent, zeolite, a formaldehyde remover and diatomite-loaded nano TiO2 into a mixing container, and stirring to obtain uniform slurry;

(2) and (2) sequentially adding a pH regulator, an emulsion, a film-forming auxiliary agent, a mildew preventive, a thickening agent, a defoaming agent and water into the slurry obtained in the step (1) under stirring, and uniformly stirring to obtain the formaldehyde-removing coating.

6. The preparation method according to claim 5, wherein the formaldehyde eliminating agent is present in an amount of 1 to 3 parts by weight based on 100 parts by weight of the formaldehyde removing coating.

7. The method according to claim 5, wherein in the step (1), the stirring is carried out for 30 to 40min at a speed of 1000 to 1500 r/min.

8. The method according to claim 5, wherein in the step (2), the stirring is carried out for 20 to 30min within a range of 300 to 500 r/min.

Technical Field

The application relates to the field of building materials, in particular to a formaldehyde-removing coating and a preparation method thereof.

Background

Formaldehyde is a colorless gas with pungent smell, and the excessive content of formaldehyde seriously harms respiratory systems, blood, nerves, skin and other systems of human bodies. In the process of home decoration, artificial boards such as wood floors and furniture and decoration materials such as various adhesives may contain formaldehyde, and the formaldehyde can be released slowly all the time, and the release amount can reach 10-15 years. How to continuously and effectively eliminate indoor formaldehyde becomes the focus of attention of people. The formaldehyde-removing coating with the function of removing formaldehyde has attracted people's selection interest because it has the functions of absorbing and decomposing formaldehyde while decorating the indoor walls of buildings. The coating with the function of eliminating formaldehyde is used as a choice for purifying indoor environment, has the advantages of low cost, large indoor coating area and no secondary pollution, and has great development potential. At present, the coating products with the function of eliminating formaldehyde on the market are various, the product quality is good, particularly, the paint film performance is good, and the coating products which can quickly eliminate formaldehyde and effectively eliminate formaldehyde for a long time are rare.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The application provides a formaldehyde-removing paint, wherein zeolite, a formaldehyde remover and diatomite-loaded nano TiO are added into the formaldehyde-removing paint₂To eliminate formaldehyde. The zeolite has larger specific surface area and can quickly adsorb formaldehyde; the formaldehyde remover and formaldehyde are subjected to chemical reaction, so that the formaldehyde is degraded; diatomite loaded nano TiO₂Improves the utilization rate of visible light and solves the problem of nano TiO₂The agglomeration and the coating can also improve the durability of the formaldehyde purification effect.

Specifically, the application provides a formaldehyde-removing coating, which comprises the following components in percentage by weight: 26-30 parts of water, 22-32 parts of filler, 5-20 parts of zeolite, 1-2 parts of formaldehyde remover and diatomite-loaded nano TiO₂1-5 parts of pigment, 12-20 parts of dispersing agent, 0.8-1.2 parts of wetting agent, 0.2-0.3 part of antifreezing agent, 0.8-1.1 parts of thickening agent, 0.6-0.7 part of defoaming agent, 0.2-0.4 part of pH regulator, 15-30 parts of emulsion, 0.7-1 part of film-forming assistant and 0.1-0.2 part of mildew preventive.

In the application, the formaldehyde-removing coating comprises, by weight, 26-30 parts of water, 22-32 parts of filler, 5-20 parts of zeolite, 1-2 parts of formaldehyde remover and diatomite-loaded nano TiO₂1-5 parts of pigment, 12-20 parts of dispersing agent, 0.8-1.2 parts of wetting agent, 0.2-0.3 part of antifreezing agent, 0.8-1.1 parts of thickening agent, 0.6-0.7 part of defoaming agent, 0.2-0.4 part of pH regulator, 15-30 parts of emulsion, 0.7-1 part of film-forming assistant and 0.1-0.2 part of mildew preventive.

In the present application, the formaldehyde-removing coating comprises, by weight: 28.5 parts of water, 30 parts of filler, 15 parts of zeolite, 2 parts of formaldehyde remover and diatomite-loaded nano TiO₂3 parts, 15 parts of pigment, 1 part of dispersing agent, 0.2 part of wetting agent, 0.5 part of antifreezing agent, 0.9 part of thickening agent, 0.7 part of defoaming agent, 0.3 part of pH regulator, 25 parts of emulsion, 0.8 part of film-forming additive and 0.15 part of mildew preventive.

In the application, the formaldehyde-removing coating comprises, by weight, 28.5 parts of water, 30 parts of filler, 15 parts of zeolite, 2 parts of formaldehyde remover and diatomite-loaded nano TiO₂3 parts, 15 parts of pigment, 1 part of dispersing agent, 0.2 part of wetting agent, 0.5 part of antifreezing agent, 0.9 part of thickening agent, 0.7 part of defoaming agent, 0.3 part of pH regulator, 25 parts of emulsion, 0.8 part of film-forming additive and 0.15 part of mildew preventive.

In the present application, the zeolite may have a specific surface area of 800m²/g～1000m²/g。

In the present application, the formaldehyde scavenger may be an amine compound, and the amine compound may be selected from any one or more of acrylamide, urea, melamine, and dicyandiamide.

In the present application, the diatomaceous earth is loaded with nano TiO₂Of TiO2₂The load can be 35 w% -40 w%, TiO₂The average grain size is 11 nm-12 nm.

Diatomite loaded nano TiO₂Improve the utilization rate of visible light and ensure that TiO₂Can form tight combination with diatomite after direct crystallization on diatomite raw soil, thereby greatly inhibiting TiO₂Agglomeration on the surface of diatomaceous earth and in micropores.

In the present application, the filler may be any one or more of calcium carbonate, barium sulfate, talc, bentonite, and quartz powder.

In the present application, the pigment may be any one or more of, for example, DuPont titanium dioxide R-706/902, Metallitic titanium dioxide R-595, and Kemeji titanium dioxide CR-828.

In the present application, the dispersant may be a sodium polyacrylate salt, an ammonium polyacrylate salt.

In the present application, the wetting agent may be a non-ionic wetting agent, for example X-405, PE-100, WE LL.7100.

In the present application, the antifreeze agent may be ethylene glycol, propylene glycol.

In the present application, the thickener may be, for example, 8W, TT-935 of Dow chemical, HBR-250 of Sustanlong, USA.

In the present application, the defoamer may be of the silicone type, mineral oils, such as defoamer DP 206.

In the present application, the pH adjuster may be an organic amine, sodium hydroxide, for example pH adjuster AMP-95.

In the present application, the emulsion may be a formaldehyde-free neat emulsion, such as EF718 from wacker, SF018 from dow, bardif RS 939.

In the present application, the coalescent may be, for example, Eschmann's OE300, a calamine chemical decaglycol ester.

In the present application, the antifungal agent may be 1, 2-Benzisothiazolin-3-One (1, 2-beziosathiazolin-3-One, BIT), 5-Chloro-2-methyl-4-isothiazolin-3-One/2-methyl-4-isothiazolin-3-One (5-Chloro-2-methyl-4-isothiazolin-3-One/2-methyl-4-isothiazolin-3-One, CMIT/MIT).

The application also provides a preparation method of the formaldehyde-removing coating, which comprises the following steps:

(1) sequentially adding water, a filler, a pigment, a dispersing agent, a wetting agent, an antifreezing agent, a thickening agent, a defoaming agent, zeolite, a formaldehyde remover and diatomite-loaded nano TiO2 into a mixing container, and stirring to obtain uniform slurry;

(2) and (3) sequentially adding a pH regulator, the emulsion, the film-forming assistant, the mildew preventive, the thickening agent, the defoaming agent and water under stirring, and uniformly stirring to obtain the formaldehyde-removing coating.

In the preparation method, in the step (1), stirring is carried out within the range of 1000 r/min-1500 r/min.

In the preparation method, in the step (1), stirring is carried out for 30-40 min.

In the preparation method, in the step (1), stirring is carried out for 30-40 min within the range of 1000 r/min-1500 r/min.

In the present application, in the step (2), the stirring is carried out at a rate of 300 to 500 r/min.

In the application, in the step (2), stirring is carried out for 20-30 min.

In the application, in the step (2), stirring is carried out for 20-30 min within the range of 300 r/min-500 r/min.

Compared with the existing coating, the formaldehyde removal coating prepared by the method has the advantages that the formaldehyde purification rate and the formaldehyde purification durability are both obviously improved and are higher than the standard in JC/T1074-2008 'indoor air purification function coating material purification performance', and the paint film performance of the formaldehyde removal coating prepared by the method is excellent.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Detailed Description

Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.