CN1322078C - Inorganic powder texture coating, and its applying method - Google Patents

Abstract

The present invention relates to inorganic powder texture paint and an applying method thereof, and particularly to discloses inorganic powder texture paint. The inorganic powder texture paint is prepared from components of the following weight percentage: 20 to 40% of cement, 30 to 60% of color sand, 2 to 8% of re-dispersing emulsion powder. 0 to 1.5% of water repellent, 0 to 3.0% of inorganic pigment, 5 to 20% lf filling material, etc. The inorganic powder texture paint prepared in the present invention has the characteristics of low VOC, good ornamental performance, easy acquirement of materials, convenient production, easy construction. The paint has favorable binding power and can be firmly bonded with cement base materials to form firm inseparable a coating layer which has the advantages of good weather resistance, ventilation, little possibility of cracking, water prevention, no toxicity, etc. The paint conforms to environment protecting requirements and operation requirements becoming strict day by day and also has a wide application prospect.

Description

A kind of inorganic dry powder texture coating and construction method thereof

technical field

The invention relates to an architectural coating, in particular to an inorganic dry powder texture coating which can be used on the inner and outer walls of buildings.

technical background

Most of the current architectural coatings are organic coatings with synthetic resin as the main film-forming substance. The raw material of synthetic resin mainly comes from petroleum, and petroleum is a non-renewable resource. With the development of society, petroleum as a major energy source and Important chemical raw materials are facing depletion due to massive exploitation, resulting in increasingly tight supply and an oil crisis. Moreover, a certain amount of organic solvents will be used in the process of manufacturing and construction of organic coatings. These organic solvents also come from petroleum, and these organic solvents will be directly discharged into the atmosphere during the production and construction of coatings, which will not only cause resources. A large amount of waste will cause direct or indirect harm to the environment and human body. Inorganic coatings use inorganic substances as the main film-forming substances. The main sources of film-forming substances are natural ores, metal oxides, etc. These raw materials are abundant and easy to obtain on the earth, and most of the inorganic coatings use water as the dispersion medium. The substance itself is non-toxic, and there is no volatile matter such as organic solvents after construction, which fully meets the requirements of environmental protection and sustainable development required by modern society. In particular, inorganic dry powder coatings are easy to produce and do not require a dispersion medium, which avoids the pollution caused by the volatilization of organic solvents into the atmosphere, and eliminates the harm and possible damage to human health during the production, transportation, storage and construction of coatings. fire hazard.

In order to achieve a certain decorative effect, organic coatings have high requirements on the flatness of the substrate and require multiple constructions. The coating usually has defects such as poor adhesion, easy foaming, cracking, and poor durability. Although the color is rich, the surface effect It is mainly flat, and it is difficult to make various three-dimensional or texture effects. The inorganic coating has good bonding performance with the porous inorganic substrate, and the formed coating is breathable, has good weather resistance, high hardness, and has good physical and chemical properties.

Contents of the invention

In order to prevent solvents in organic coatings from harming the environment and human health, realize sustainable social development, save energy, and make up for the simplification of organic coatings, the purpose of the present invention is to provide an inorganic dry powder texture coating that does not contain Organic solvent can better protect the wall surface, make the decoration effect more diversified, and the construction is simple, which can meet the increasingly stringent environmental protection requirements and individual application requirements.

Main technical scheme of the present invention is as follows:

The composition of the inorganic dry powder texture paint is (percentage by weight): 20-40% of cement, 2-8% of redispersible latex powder, 0.1-0.5% of thickener, 0.1-0.5% of anti-cracking agent, and 30-60% of colored sand , 5-20% filler.

In the present invention, water-repellent agent can also be added as required, its weight percentage is 0.0-1.5%, and inorganic pigment can also be added as required, its weight percentage is 0-3.0%.

The inorganic dry powder texture paint of the present invention is mainly composed of inorganic materials such as cement, colored sand, and fillers, supplemented by dispersible latex powder and various additives. With cement as the main binder, the cement is white Portland cement No. 425 or white Portland cement No. 425 mixed with ordinary Portland cement with a strength grade of 42.5R in any proportion. The construction is applied to the cement substrate. A porous coating is obtained on the substrate, which gradually forms a homogeneous layer with the substrate and is firmly bonded together. Redispersible latex powder is a copolymer formed by the reaction of vinyl acetate and any one or more of vinyl tertiary carbonate, ethylene, and acrylate, and the emulsion powder obtained by spray drying has good redispersibility , when in contact with water, it redisperses into an emulsion, and its chemical properties are exactly the same as the initial emulsion, which can improve the cohesive force and cohesion of the material, reduce the water absorption of the material, reduce the elastic modulus of the material, and enhance the flexural strength of the material. Impact resistance, wear resistance and durability, improve the construction performance of the material, generally add redispersible latex powder to the dry-mixed ready-mixed mortar, which can improve various properties of the mortar. The thickener includes hydroxyethyl methylcellulose, hydroxypropyl methylcellulose, etc. Adding the thickener can improve the water retention and construction performance of the inorganic dry powder texture coating. The anti-cracking agent includes wood fiber or artificial fiber, the length of which is 0.02-5 mm in length and 1-100 microns in diameter, which enhances the cracking resistance of the paint film. The selected water-repellent is organic silicon powder and zinc stearate. Colored sand is natural colored sand and artificial colored sand, which are graded according to decorative requirements by 20-40 mesh, 40-80 mesh, 80-120 mesh, etc., and can provide color and three-dimensional effects. The pigment is an inorganic dry powder pigment. Fillers include 200-400 mesh quartz powder or heavy calcium carbonate or wollastonite powder or talcum powder, etc., which can not only fill the gap but also reduce the cost.

The production process of the coating is as follows: put various raw materials into the mixer in proportion, and after mixing evenly, they can be packaged and put into storage.

Inorganic dry powder texture coatings require qualified substrates to be flat, solid, and clean, with no oil, floating dust, loose particles, and no mold, moss, oil, and other pollutants on the surface. During construction, first mix the inorganic dry powder texture paint according to the ratio: paint: water <weight ratio>=100:20~40, stir evenly, adjust the construction viscosity, and then use napping rollers, embossing rollers, special rollers, trowels, One or more of the construction tools such as spray guns and brushes can be used to obtain coatings of different shapes by using any one or more of the construction methods such as roller coating, spray coating, batch scraping, brush coating, etc. It has a good decorative effect, and the special roller refers to a roller designed into a corresponding shape according to the shape of the wall.

Compared with ordinary paints, this paint has the following characteristics:

1. Low VOC, environmental protection; the raw materials used are dry powder, most of which are easily available inorganic materials, the VOC in the coating is almost zero, and has no adverse effects on the human body and the environment.

2. The construction is easy and convenient; it can be directly constructed on qualified substrates without primer, and can be constructed with various construction tools.

3. Unique texture and strong decoration; various construction tools and construction methods can obtain various surface effects, which are highly decorative and can meet individual requirements.

4. Water-resistant, breathable, non-foaming, and non-cracking; the coating formed by inorganic binders, colored sand with different particle size distributions, fillers, etc. is porous, which makes the coating have good air permeability and water resistance. It will not foam, and the addition of various additives makes the coating have a certain toughness and is not easy to crack.

5. The color is rich and natural, and the durability is good; the inorganic material is stable and has good weather resistance, colored sand and inorganic pigments can make the coating color natural and rich.

Detailed ways

Example 1

The composition and percentage by weight of the present embodiment are: 20.0% of No. 425 white cement, 8.0% of redispersible latex powder, 0.2% of hydroxypropyl methylcellulose, 0.3% of water-repellent organic silicon powder, 0.5% of wood fiber, 56.0% of 80-120 mesh colored sand, 15.0% of 325 mesh quartz powder.

Use the inorganic dry powder texture paint that embodiment 1 gains: water=100: 30～35 (weight ratio) cutting; First batch scrape once, after 4 hours, use nap roller roller to coat again, curing seven days, can obtain texture strong, decorative Highly resistant, napped coating.

Example 2

The composition and percentage by weight of the present embodiment are: 28.0% of No. 425 white cement, 6.5% of redispersible latex powder, 0.35% of hydroxypropyl methylcellulose, 0.25% of water-repellent organic silicon powder, 0.4% of wood fiber, Inorganic pigment iron oxide red 0.1%, 80-120 mesh colored sand 54.55%, 325 mesh quartz powder 10.0%.

With the inorganic dry powder texture paint that embodiment 2 gains: water=100: 25～30 (weight ratio) cutting; Batch scraping twice, curing seven days, can obtain the coating that has strong texture, highly decorated artificial stone effect.

Example 3

The composition and weight percent of this embodiment are: No. 425 white cement 35.0%, redispersible latex powder 4.0%, hydroxyethyl methylcellulose 0.3%, water repellent 0.4%, wood fiber 0.2%, inorganic pigment iron oxide Yellow 0.2%, 40-80 mesh colored sand 5%, 80-120 mesh colored sand 46.9%, 325 mesh quartz powder 8.0%.

Use the inorganic dry powder texture coating obtained in Example 3: water=100:25～30 (weight ratio) to cut the material; directly use the embossing roller to coat it once, and maintain it for seven days to obtain a strong texture and a very high decoration with special texture. Textured effect coating.

Example 4

The composition and weight percent of this embodiment are: 36.0% of No. 425 white cement, 4% of 42.5R ordinary Portland cement, 2.0% of redispersible latex powder, 0.1% of hydroxypropyl methylcellulose, and water-repellent organic silicon Powder 0.2% wood fiber 0.5%, 20-40 mesh colored sand 2.0%, 40-80 mesh colored sand 7.0%, 80-120 mesh colored sand 43.2%, 325 mesh quartz powder 5.0%.

Use the inorganic dry powder texture coating obtained in Example 4: water=100:20～25 (weight ratio) to cut the material; directly apply it once with a bare roller, and maintain it for seven days to obtain a strong texture, high decoration and imitation tree. Leather effect coating.

Claims (10)

1, a kind of inorganic powder texture coating is characterized in that the weight percent of its component and each component comprises:

Cement 20～40%,

Redispersable latex powder 2～8%,

Thickening material 0.1～0.5%,

Anti-fissuring agent 0.1～0.5%,

Color sand 30～60%,

Filler 5～20%,

Hydrophober 0～1.5%.

2, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected hydrophober is silicone based powder or Zinic stearas.

3, a kind of inorganic powder texture coating according to claim 1 is characterized in that containing mineral dye in its composition, and its weight percent is 0～3.0%, and selected pigment is inorganic powder pigment.

4, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected cement is that label is the mixture of the arbitrary proportion of the white portland cement of No. 425 white portland cement or No. 425 and the ordinary Portland cement that strength grade is 42.5R.

5, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected color sand is any one or a few the mixing in 20～40 orders, 40～80 orders, 80～120 purpose natural colour sands or the artificial color sand.

6, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected thickening material is hydroxyethylmethyl-cellulose or Vltra tears.

7, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected anti-fissuring agent is wood fibre or regenerated fiber, its length at 0.02～5 millimeter, diameter between 1～100 micron.

8, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected redispersable latex powder is the multipolymer that is generated by any one or a few reaction in vinyl acetate and tertiary ethylene carbonate, ethene, the acrylate.

9, a kind of inorganic powder texture coating according to claim 1 is characterized in that selected filler is any one or a few in 200～400 purpose silica powders or water-ground limestone or wollastonite powder or the talcum powder.

10, a kind of constructional method of a kind of inorganic powder texture coating as claimed in claim 1, it is characterized in that directly on qualified base material, constructing one time or two times, elder generation with the inorganic powder texture coating by weight proportion during construction: coating: water=100: 20～40 allotments, stir, regulate working viscosity, use the plucking cylinder then, impression cylinder, special cylinder, criticize cutter, spray gun, the service tool of one or more in the brush, use roller coat, spraying, criticize and scrape, brush any one or more than one method construction wherein, can obtain the coating of different shaping.