阅读说明：本技术 一种多彩涂料及其制备方法 (Multicolor paint and preparation method thereof ) 是由 侯进全 邱永兰 于 2020-03-23 设计创作，主要内容包括：本发明涉及一种多彩涂料及其制备方法,多彩涂料包括保护胶溶液、基础漆及清漆混合构成；保护胶溶液包括去离子水、保护胶；基础漆包括去离子水、分散剂、纯丙乳液、颜料、成膜助剂、消泡剂；清漆包括去离子水、纯丙乳液、成膜助剂、阻燃剂、消泡剂、增稠剂；制备方法包括首先分别通过将相应组分混合得到保护胶溶液、基础漆及清漆；再将含有不同颜料的基础漆加入至保护胶溶液中,均匀造粒后,得到多彩色粒；最后将清漆缓慢加入至多彩色粒中并混合均匀,即得到多彩涂料。与现有技术相比,本发明具有制备方法简单、条件温和、所用组分中不含有毒有害及高污染性物质、安全环保、耐火隔热性良好等优点。(The invention relates to a multicolor paint and a preparation method thereof, wherein the multicolor paint comprises a protective glue solution, a base paint and a varnish which are mixed; the protective glue solution comprises deionized water and protective glue; the base paint comprises deionized water, a dispersant, a pure acrylic emulsion, a pigment, a film-forming assistant and a defoaming agent; the varnish comprises deionized water, pure acrylic emulsion, a film-forming additive, a flame retardant, a defoaming agent and a thickening agent; the preparation method comprises the steps of firstly, respectively mixing corresponding components to obtain a protective adhesive solution, a base paint and a varnish; adding base paint containing different pigments into the protective glue solution, and uniformly granulating to obtain colorful granules; and finally, slowly adding the varnish into the colorful granules and uniformly mixing to obtain the colorful coating. Compared with the prior art, the invention has the advantages of simple preparation method, mild conditions, no toxic, harmful and high-pollution substances contained in the used components, safety, environmental protection, good fire resistance and heat insulation, and the like.)

1. A multicolor paint is characterized in that the multicolor paint is formed by mixing a protective glue solution, a base paint and a varnish according to the mass ratio of (1-3) to (2-5) to (2-4);

the protective glue solution comprises the following components in percentage by weight:

100 parts of deionized water and 5-20 parts of protective adhesive;

the base paint comprises the following components in percentage by weight:

100 parts of deionized water, 0.1-0.3 part of dispersant, 30-50 parts of pure acrylic emulsion, 1-5 parts of pigment, 1-3 parts of film-forming assistant and 0.2-0.6 part of defoaming agent;

the varnish comprises the following components in percentage by weight:

100 parts of deionized water, 150 parts of acrylic emulsion, 200 parts of film-forming additive, 10-20 parts of flame retardant, 0.05-0.2 part of defoaming agent and 0.3-0.9 part of thickening agent.

2. The multicolor paint of claim 1, wherein the protective glue is one of GS-type protective glue, GTS-type protective glue, and L acetonitrile S-482 type protective glue.

3. The multicolor paint according to claim 1, wherein said dispersant is one of alkyl polyoxyethylene ether, trisodium phosphate, and silicate.

4. The multicolor paint according to claim 1, wherein the pigment is at least one of carbon black, titanium dioxide, iron oxide yellow, iron oxide red, lead chrome green, phthalocyanine blue and permanent violet.

5. The multicolor paint according to claim 1, wherein said film-forming assistant is one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol butyl ether, lauryl alcohol, dipropylene glycol methyl ether, and dipropylene glycol butyl ether.

6. A multicolor paint according to claim 1, characterized in that said flame retardant is prepared by the following steps: sequentially adding methyl guanamine and melamine with the mass ratio of 1 (10-20) into deionized water, uniformly mixing, dropwise adding concentrated phosphoric acid, stirring and reacting at the temperature of 85-100 ℃ at the rotating speed of 3000-5000rpm for 1-2h, and sequentially filtering, washing and drying to obtain the flame retardant.

7. The multicolor paint as claimed in claim 1, wherein said defoaming agent is one of polydimethylsiloxane, polyether-modified polydimethylsiloxane, and fluorosilicone; the thickener is one of ASE-60, TT-935 and rM-8W.

8. A method for producing a multicolor paint as claimed in any one of claims 1 to 7, characterized in that it comprises the following steps:

1) preparing a protective glue solution, namely slowly adding the protective glue into deionized water, and stirring and dispersing at the rotating speed of 800-;

2) preparing a base paint, namely adding the pigment and the film-forming auxiliary agent into deionized water in sequence, stirring and dispersing at the rotating speed of 800rpm of 500 plus materials for 3-5min, then adding the pure acrylic emulsion and the defoaming agent in sequence, stirring and dispersing at the rotating speed of 1200rpm of 800 plus materials for 5-15min, standing for 2-4min, then adding the dispersing agent, and stirring at the rotating speed of 1200rpm of 800 plus materials for 3-5min to obtain the base paint;

3) preparing color particles, namely sequentially and slowly adding base paints of different pigments into the protective glue solution, and uniformly granulating through a 20-40-mesh screen; obtaining colorful grains;

4) preparing varnish, namely adding styrene-acrylic emulsion, a film-forming additive, a defoaming agent and a thickening agent into deionized water in sequence, and stirring at the rotating speed of 500-800rpm for 8-15min to obtain the varnish;

5) and (3) preparing the colorful coating, namely slowly adding the varnish into the colorful granules and uniformly mixing to obtain the colorful coating.

Technical Field

The invention belongs to the technical field of building materials, and relates to a multicolor paint and a preparation method thereof.

Background

The colorful coating is a coating which can obtain high-grade decorative materials such as imitated natural marble, granite and the like by one-time coating, is different from the traditional architectural coating product with monotonous color, not only has the spraying effect of gorgeous color, unique pattern and vivid effect, but also has the advantages of reducing the building bearing capacity, being convenient to construct, low in cost, environment-friendly, non-toxic and the like, and is widely applied to the field of decoration of internal and external walls of buildings. However, most of such coatings are flammable coatings, and with the occurrence of serious indoor fire accidents in recent years, fire safety is more emphasized, and the requirements of multicolor coatings are not only decorative and construction properties, but also better protection of building structures in case of fire or high temperature is desired to be achieved by using the applied coatings as a fire-resistant and heat-insulating coating.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a multicolor paint and a preparation method thereof.

The purpose of the invention can be realized by the following technical scheme:

a multicolor paint is formed by mixing a protective adhesive solution, a base paint and a varnish according to the mass ratio of (1-3) to (3-5) to (2-4);

the protective glue solution comprises the following components in percentage by weight:

100 parts of deionized water and 5-20 parts of protective adhesive;

the base paint comprises the following components in percentage by weight:

100 parts of deionized water, 0.1-0.3 part of dispersant, 30-50 parts of pure acrylic emulsion, 1-5 parts of pigment, 1-3 parts of film forming assistant and 0.2-0.6 part of defoaming agent;

the varnish comprises the following components in percentage by weight:

100 parts of deionized water, 150 parts of acrylic emulsion, 200 parts of film-forming additive, 10-20 parts of flame retardant, 0.05-0.2 part of defoaming agent and 0.3-0.9 part of thickening agent.

The protective glue is mainly composed of magnesium lithium silicate with a trioctahedron layered structure, crystal unit structures of the magnesium lithium silicate are nano-scale tiny thin sheets, the surfaces of the thin sheets are negatively charged, end faces of the thin sheets are positively charged, the thin sheets are rapidly separated under the influence of water molecules after being added into water, and the end faces of the thin sheets and the thin sheets attract each other to be beneficial to forming a three-dimensional cabin structure on the surfaces of color grains, so that the protective glue has a good protective effect on the color grains and improves the color and permeation resistance of the multicolor paint.

Furthermore, the dispersing agent is one of alkyl polyoxyethylene ether, trisodium phosphate and silicate, and is used for being adsorbed on the surface of the pigment particles and generating steric hindrance and charge repulsion, so that the dispersibility of the pigment particles is improved, and the agglomeration of the pigment particles is avoided.

Further, the pigment is at least one of carbon black, iron oxide yellow, iron oxide red, lead chromium green, phthalocyanine blue and permanent violet.

Further, the film-forming assistant is one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol butyl ether, dodecyl alcohol, dipropylene glycol methyl ether and dipropylene glycol butyl ether. The addition of the film-forming additive is beneficial to enhancing the rapid film formation of the colorful coating and reducing the construction time of the coating.

Further, the preparation method of the flame retardant comprises the following steps: sequentially adding methyl guanamine and melamine with the mass ratio of 1 (10-20) into deionized water, uniformly mixing, dropwise adding concentrated phosphoric acid, stirring and reacting at 85-100 ℃ at the rotating speed of 3000-5000rpm for 1-2h, and sequentially filtering, washing and drying to obtain the flame retardant, wherein the concentration of the concentrated phosphoric acid is 85%, and the molar ratio of the melamine to the phosphoric acid is 1 (0.5-1). The prepared flame retardant is a nitrogen-phosphorus intumescent flame retardant, and is dispersed in the finished coating through hydrogen bonds formed between P-OH on the flame retardant and water molecules and carboxyl and hydroxyl groups on the acrylic emulsion, and can be uniformly distributed on the surface and inside of the coating in the coating spraying process to form a fireproof colorful coating.

Further, the defoaming agent is one of polydimethylsiloxane, polyether modified polydimethylsiloxane and fluorosilicone, and is used for reducing bubbles generated in the stirring and mixing process and preventing color particles from floating on the surface of a dispersion medium under the influence of the bubbles; the thickener is one of ASE-60, TT-935 and rM-8W.

The preparation method of the multicolor paint comprises the following steps:

1) preparing a protective glue solution, namely slowly adding the protective glue into deionized water, and stirring and dispersing at the rotating speed of 200-400rpm for 20-40min to obtain the protective glue solution;

2) preparing a base paint, namely adding the pigment and the film-forming auxiliary agent into deionized water in sequence, stirring and dispersing at the rotating speed of 800rpm of 500 plus materials for 3-5min, then adding the pure acrylic emulsion and the defoaming agent in sequence, stirring and dispersing at the rotating speed of 1200rpm of 800 plus materials for 5-15min, standing for 2-4min, then adding the dispersing agent, and stirring at the rotating speed of 1200rpm of 800 plus materials for 3-5min to obtain the base paint;

3) preparing color particles, namely sequentially and slowly adding base paints of different pigments into the protective glue solution, and uniformly granulating through a 20-40-mesh screen; obtaining colorful grains;

4) preparing varnish, namely adding styrene-acrylic emulsion, a film-forming additive, a defoaming agent and a thickening agent into deionized water in sequence, and stirring at the rotating speed of 800-;

5) and (3) preparing the colorful coating, namely slowly adding the varnish into the colorful granules and uniformly mixing to obtain the colorful coating.

Compared with the prior art, the invention has the following characteristics:

1) the flame retardant used in the invention has higher expansion rate, an expansion layer can be formed when being heated, the inside of the expansion layer is surrounded by a large amount of gas, and the gas is a poor heat conductor, so that the contact between a fire source and a burnt object is prevented, a better flame retardant effect is achieved, the fireproof and flame retardant properties of the coating are improved, and the fireproof and heat insulation properties of the coating are further improved by introducing a methyl guanamine group;

2) compared with the common multi-component composite flame retardant, the nitrogen-phosphorus intumescent flame retardant contains an acid source, a carbon source and a gas source, and effectively avoids the problem of unsatisfactory flame retardant performance caused by poor cooperativity of components due to poor multi-component dispersibility;

3) the main components of the protective glue are all composed of magnesium lithium silicate with a trioctahedral lamellar structure, the crystal unit structure of the magnesium lithium silicate is a nano-scale tiny thin sheet, the sheet surface is negatively charged, the end surface is positively charged, the sheets are rapidly separated under the influence of water molecules after being added into a water body, and the sheet surface mutually attract to be beneficial to forming a three-dimensional cabin structure on the surface of the color grains, so that the protective glue has a good protective effect on the color grains and improves the color impermeability of the multicolor paint;

4) the preparation method is simple, the conditions are mild, and the used components do not contain toxic, harmful and high-pollution substances, so that the preparation method is safe and environment-friendly.

Detailed Description

The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.