阅读说明：本技术 一种水性涂料 (Water-based paint ) 是由 赵立军 于 2021-07-15 设计创作，主要内容包括：一种水性涂料,包括粉料和乳液,其中,粉料包括白水泥、石灰石、增稠剂、减水剂、憎水剂、含羟基有机羧酸。本申请所提供的涂料,应用于墙体表面,可以具有30年使用寿命,不会出现起皮开裂、泛碱、发霉等问题,可以用水清洗而不影响涂层性能。本申请所提供的水性涂料,可以二次打磨抛光翻新,并且可以根据喜好或需要增加颜色,制成艺术墙面,所制成的涂层,硬度高,不会轻易产生划痕。(The water paint includes powder material and emulsion, and the powder material includes white cement, limestone, thickener, water reducing agent, water repellent and hydroxyl group containing organic carboxylic acid. The application provides a coating is applied to the wall body surface, can have 30 years life, peeling crack, salt efflorescence, moldy scheduling problem can not appear, can wash with the water and do not influence the coating performance. The water-based paint provided by the application can be polished and refurbished for the second time, and can be added with colors according to the preference or needs to be made into an artistic wall surface, and the made coating is high in hardness and cannot scratch easily.)

1. The water paint is characterized by comprising powder and emulsion, wherein the powder comprises white cement, limestone, a thickening agent, a water reducing agent, a water repellent and hydroxyl-containing organic carboxylic acid.

2. The water-based paint as claimed in claim 1, wherein the emulsion is selected from one or more of pure acrylic emulsion, silicone acrylic emulsion, styrene acrylic emulsion and vinyl acetate acrylic emulsion.

3. An aqueous coating according to claim 1 or 2, characterized in that the emulsion has a solids content of 20 to 50 wt.%.

4. The aqueous coating of claim 1, wherein the thickener is selected from the group consisting of cellulosic thickeners.

5. The aqueous coating of claim 1, wherein the water repellent is an organosilicon water repellent.

6. The water-based paint of claim 1, wherein the water reducing agent is any one or more of lignosulfonate, naphthalene sulfonate formaldehyde polymer and polycarboxylic acid water reducing agent.

7. The aqueous coating according to claim 1, characterized in that the hydroxyl-containing organic carboxylic acid is preferably an α -hydroxy organic carboxylic acid, as shown below:

wherein R is¹And R²Independently preferably, the alkyl group is absent, or a saturated alkyl group of C1-C6, a cycloalkyl group of C3-C6, an aromatic alkyl group of C5-C10, or a combination thereof.

8. The aqueous coating composition of claim 1, wherein the powder comprises, by weight of powder one ton: 120 kg of limestone, 450 g of cellulose, 600g of water reducing agent, 700 g of water reducing agent, 1-2.5kg of water repellent, 800g of hydroxyl-containing organic carboxylic acid and the balance of white cement.

9. The aqueous coating composition of claim 8, wherein the weight ratio of the emulsion to the powder is 1: 2-5.

10. A method of making a coating on a wall surface, comprising: mixing the emulsion of the water-based paint of claim 1 with powder to form slurry, applying the slurry to the surface of a wall at 0-50 ℃, and drying.

Technical Field

The invention relates to a coating, in particular to a water-based coating with good durability and weather resistance.

Background

Coatings (including paints) are applied to the surface of an object to be protected or decorated and form a continuous film which is firmly attached to the object to be coated. The definition of the coating from the coating technology book which is relatively authoritative in the Chinese coating world is as follows: the paint is a material which can be coated on the surface of an object by different construction processes to form a continuous solid film with firm adhesion and certain strength. The film thus formed is generally called a coating film, also called a paint film or a coating. "

The water-based paint has good environmental protection performance, but has certain difference in functionality compared with the traditional solvent-based paint. The development of water-based coatings is one of the important directions for the development of water-based coatings. Durability is particularly important for architectural coatings, including weatherability, stain resistance, water resistance, alkali resistance, water resistance, and the like. The coating is exposed in the atmosphere all the year round, is subject to climate change all the year round, and is easy to crack, pulverize, discolor, bubble, drop, stain and the like under the external action of cold, heat, oxidation, humidity and the like, so that the original decorative effect and protective function of the coating are lost.

Disclosure of Invention

The application provides a water-based paint, wherein a coating layer of the water-based paint has a longer service life and can be used as an interior and exterior wall paint.

The first aspect of the application provides a water-based paint which comprises powder and emulsion, wherein the powder comprises white cement, limestone, a thickening agent, a water reducing agent, a water repellent and hydroxyl-containing organic carboxylic acid.

In a preferred embodiment, the emulsion can be any one or more selected from pure acrylic emulsion, silicone acrylic emulsion, styrene acrylic emulsion and vinyl acetate acrylic emulsion.

In a preferred embodiment, the emulsion preferably has a solids content of 20 to 50 wt.%.

It should be understood that the limestone includes both conventional limestone and limestone heavy calcium powder.

In a preferred embodiment, the thickener is preferably a polymeric thickener, in particular a cellulose thickener, a polyacrylic acid thickener, a polyoxyethylene ether thickener, a polysaccharide thickener, or a protein thickener.

In a preferred embodiment, the thickener is particularly preferably a cellulosic thickener, such as methyl cellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl ethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, hydroxybutyl methyl cellulose and the like.

In a preferred embodiment, the water reducing agent is preferably any one or more of lignosulfonate, naphthalene sulfonate formaldehyde polymer, polycarboxylic acid water reducing agent.

In a preferred embodiment, the water repellent is preferably an organosilicon water repellent.

In a preferred embodiment, the hydroxyl-containing organic carboxylic acid is preferably an α -hydroxy organic carboxylic acid, as shown below:

or

Wherein R is¹And R²Independently preferably, the alkyl group is absent, or a saturated alkyl group of C1-C6, a cycloalkyl group of C3-C6, an aromatic alkyl group of C5-C10, or a combination thereof.

Specifically, the organic carboxylic acid containing a hydroxyl group may be any one or more of α -hydroxy lactic acid, tartaric acid, 2, 3-dihydroxypropionic acid, 2-hydroxypropionic acid, 2-hydroxybutyric acid, malic acid, hydroxymalonic acid, malic acid, and gluconic acid.

In a preferred embodiment, the powder comprises, by weight of one ton of powder: 120 kg of limestone, 450 g of cellulose, 600g of water reducing agent, 700 g of water reducing agent, 1-2.5kg of water repellent, 800g of hydroxyl-containing organic carboxylic acid and the balance of white cement.

More preferably, the powder comprises, by weight of one ton of powder: 170-250kg of limestone, 500-560g of cellulose, 850-1000g of water reducing agent, 1.2-1.8kg of water repellent, 600g of hydroxyl-containing organic carboxylic acid and 450-g of white cement.

In a preferred embodiment, the weight ratio of emulsion to powder is 1: 2-5, more preferably 1: 3-3.5.

In a second aspect, the present application provides a method of making a coating on a wall surface, comprising: mixing the emulsion with powder to form slurry, coating the slurry on the surface of a wall at 0-50 ℃, and drying.

In a preferred embodiment, after drying, the method further comprises the steps of grinding and polishing.

The application provides a water based paint, be applied to the wall body surface, can have 30 years life, skinning fracture, salt pan, moldy scheduling problem can not appear, can not influence the coating performance with water washing.

The water-based paint provided by the application can be used for polishing and renewing for the second time. And the color can be added according to the favor or the requirement to manufacture the artistic wall surface.

The water-based paint prepared by the method has high hardness and cannot easily generate scratches.

Detailed Description

Example 1

The water-based paint component comprises:

firstly, emulsion:

acrylic emulsion (acrylic emulsion) with a solids content of 40 wt.%,

second, powder material (per ton)

And (3) mixing the emulsion and the powder in a weight ratio of 1:3, blade-coating the emulsion and the powder on the surface of a wall at room temperature, drying, and polishing to form a matte or bright coating.

Example 2

The water-based paint component comprises:

firstly, emulsion:

acrylic emulsion (acrylic emulsion) having a solid content of 35% by weight,

second, powder material (per ton)

And (3) mixing the emulsion and the powder in a weight ratio of 1:3, blade-coating the emulsion and the powder on the surface of a wall at room temperature, drying, and polishing to form a matte or bright coating.

Example 3

The water-based paint component comprises:

firstly, emulsion:

acrylic emulsion (styrene-acrylic emulsion) with a solid content of 25 wt%,

second, powder material (per ton)

And (3) mixing the emulsion and the powder in a weight ratio of 1:3, blade-coating the emulsion and the powder on the surface of a wall at room temperature, drying, and polishing to form a matte or bright coating.

Example 4

The water-based paint component comprises:

firstly, emulsion:

acrylic emulsion (silicone-acrylic emulsion) with a solid content of 30 wt%,

second, powder material (per ton)

And (3) mixing the emulsion and the powder in a weight ratio of 1:3, blade-coating the emulsion and the powder on the surface of a wall at room temperature, drying, and polishing to form a matte or bright coating.

The exterior wall coating prepared by the application is subjected to an aging test (GB/T1865-.

Table 1 shows the properties of the exterior wall coatings prepared by the above embodiments of the present application

	Example 1	Example 2	Example 3	Example 4
					Bubbling device	Level 0	Level 0	Level 0	Level 0
Peeling and cracking	Level 0	Level 0	Level 0	Level 0
					Degree of powdering	Level 0	Level 0	Level 0	Level 0
Alkali resistance	Without abnormality (without efflorescence)	No abnormality	No abnormality	No abnormality
					Grade of mold growth	Level 0	Level 0	Level 0	Level 0
Washing and brushing resistance	Not less than 2000 times	Not less than 2000 times	Not less than 2000 times	Not less than 2000 times
					Hardness of	5H	4H	4H	5H

The water-based paint is applied to the surface of an external wall of a certain building in the Shanghai for the first time, has the history of 30 years, and still has no phenomena of peeling, cracking, bubbling, mildewing and saltpetering at present.

The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.