阅读说明：本技术 一种内墙保温涂料及其制备方法 (Interior wall heat-insulating coating and preparation method thereof ) 是由 许自荣 于 2020-08-06 设计创作，主要内容包括：本发明涉及保温涂料技术领域,提供一种内墙保温涂料及其制备方法,包括以下重量份的原料：改性苯丙乳液30-40份、硅丙乳液15-30份、磷酸二氢铝5-10份、空心陶瓷微珠10-18份、硅酸铝纤维5-9份、石墨烯3-6份、硅藻土4-8份、硅酸锆3-6份、电气石粉2-5份、麦饭石1-4份、硅烷偶联剂0.8-2份、分散剂1-3份、增稠剂0.5-1.2份、消泡剂0.5-1份、防腐剂0.4-0.8份、水18-32份。解决了现有技术内墙保温涂料功能单一,仅具备保温隔热效果,附着力不足等问题,同时赋予涂层保健的功效。(The invention relates to the technical field of heat-insulating coatings, and provides an interior wall heat-insulating coating and a preparation method thereof, wherein the interior wall heat-insulating coating comprises the following raw materials in parts by weight: 30-40 parts of modified styrene-acrylic emulsion, 15-30 parts of silicone-acrylic emulsion, 5-10 parts of aluminum dihydrogen phosphate, 10-18 parts of hollow ceramic microspheres, 5-9 parts of aluminum silicate fibers, 3-6 parts of graphene, 4-8 parts of diatomite, 3-6 parts of zirconium silicate, 2-5 parts of tourmaline powder, 1-4 parts of medical stone, 0.8-2 parts of silane coupling agent, 1-3 parts of dispersing agent, 0.5-1.2 parts of thickening agent, 0.5-1 part of defoaming agent, 0.4-0.8 part of preservative and 18-32 parts of water. The problems that the interior wall heat-insulating coating in the prior art is single in function, only has heat-insulating effect, insufficient in adhesive force and the like are solved, and the coating has the health-care effect.)

1. An interior wall heat-insulating coating is characterized in that: the paint comprises the following components in parts by weight: 30-40 parts of modified styrene-acrylic emulsion, 15-30 parts of silicone-acrylic emulsion, 5-10 parts of aluminum dihydrogen phosphate, 10-18 parts of hollow ceramic microspheres, 5-9 parts of aluminum silicate fibers, 3-6 parts of graphene, 4-8 parts of diatomite, 3-6 parts of zirconium silicate, 2-5 parts of tourmaline powder, 1-4 parts of medical stone, 0.8-2 parts of silane coupling agent, 1-3 parts of dispersing agent, 0.5-1.2 parts of thickening agent, 0.5-1 part of defoaming agent, 0.4-0.8 part of preservative and 18-32 parts of water;

the synthetic method of the modified styrene-acrylic emulsion comprises the following steps: (1) weighing raw materials in parts by weight respectively for later use, wherein the raw materials comprise 20-25 parts of styrene, 30-38 parts of ethyl acrylate, 0.4-0.6 part of ammonium persulfate, 1.5-2.5 parts of emulsifier, 0.32-0.4 part of sodium bicarbonate, 6-12 parts of waterborne polyurethane and 60-80 parts of water; (2) mixing styrene, ethyl acrylate, ammonium persulfate, an emulsifier, sodium bicarbonate and half of water, and stirring at a high speed for emulsification for 15-30min to obtain a pre-emulsion; (3) adding the waterborne polyurethane and the other half of water into a reactor, introducing nitrogen for protection, heating to 75-85 ℃, then slowly adding the pre-emulsion, reacting for 3.5-5h, cooling and discharging to obtain the polyurethane modified styrene-acrylic emulsion.

2. The interior wall thermal insulation coating material according to claim 1, characterized in that: the emulsifier is formed by mixing sodium dodecyl sulfate and tween-80 in any ratio.

3. The interior wall thermal insulation coating material according to claim 1, characterized in that: the dispersing agent is any one of acrylate block polymer and polyacrylate dispersing agent.

4. The interior wall thermal insulation coating material according to claim 1, characterized in that: the thickening agent is any one of sodium carboxymethylcellulose, polyacrylamide and polyurethane associated thickening agent.

5. The interior wall thermal insulation coating material according to claim 1, characterized in that: the defoaming agent is an organic silicon defoaming agent or a polyether defoaming agent.

6. The interior wall thermal insulation coating material according to claim 1, characterized in that: the preservative is any one of cason and 1, 2-benzisothiazolin-3-one.

7. A method for preparing the interior wall thermal insulation coating according to claim 1, characterized in that: the method comprises the following steps:

s1, mixing hollow ceramic microspheres, aluminum silicate fibers, graphene, diatomite, zirconium silicate, tourmaline powder, medical stone, a silane coupling agent, a dispersing agent, a defoaming agent and water, stirring uniformly, transferring into a grinding cylinder body, and grinding until the fineness is less than or equal to 20 microns;

s2, adding the modified styrene-acrylic emulsion, the silicone-acrylic emulsion, the aluminum dihydrogen phosphate, the thickening agent and the preservative, and stirring and mixing uniformly to obtain the interior wall heat-insulating coating.

Technical Field

The invention relates to the technical field of heat-insulating coatings, in particular to an inner wall heat-insulating coating and a preparation method thereof.

Background

With the increasing severity of energy shortage, how to save energy and reduce consumption becomes a problem facing the whole society. In the field of construction, a national mandatory requirement is that buildings meet certain energy-saving standards. The heat-insulating coating is an important part of building energy conservation, has become a popular subject of industrial research, and is paid attention by countries in the world. The published Chinese patents such as CN107868530A, CN106747221A, CN106587767A and the like are coatings with obvious heat insulation effect on the outer wall of a building, the research focus is mainly on developing the heat insulation coating of the outer wall, and the research on the heat insulation coating of the inner wall is not important enough. The most common indoor heat insulation material is asbestos material, which is a toxic and harmful substance and can release substances harmful to human bodies to directly affect human health, so that the material is forbidden to be used in the field of indoor decoration by the national regulations. However, with the further improvement of the national requirements on the building materials, higher requirements are put forward on the heat preservation effect of the building materials. In recent years, various heat insulating coatings for interior walls have been developed, such as chinese patent No.: 201210578877.X discloses an interior wall thermal insulation coating, which comprises the following components in parts by weight: 5-45 parts of water, 3-25 parts of an auxiliary agent, 3-55 parts of an inorganic filler, 5-55 parts of a coating resin and 1-30 parts of metal powder. The metal powder can reflect the middle far infrared ray at a high level, so when the inner wall heat-insulating coating provided by the invention is adopted, the middle far infrared ray emitted by indoor heating equipment, household appliances, human bodies and the like can be reflected back to the room in a great proportion; and due to the continuity and instantaneity of heat energy emission, most of heat energy absorbed by the surface of the interior wall heat-insulating coating is reflected back to the interior of the room instantly, so that the indoor heat-insulating effect is improved.

The existing interior wall heat-insulating coating has insufficient adhesive force and poor water resistance, most of the interior wall heat-insulating coatings only have the heat-insulating effect, and the interior wall heat-insulating coatings have single function and do not have other performances.

Disclosure of Invention

Therefore, aiming at the content, the invention provides an interior wall heat-insulating coating and a preparation method thereof, and solves the problems that the interior wall heat-insulating coating in the prior art is single in function, only has heat-insulating effect, is insufficient in adhesive force and the like.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an interior wall heat-insulating coating comprises the following components in parts by weight: 30-40 parts of modified styrene-acrylic emulsion, 15-30 parts of silicone-acrylic emulsion, 5-10 parts of aluminum dihydrogen phosphate, 10-18 parts of hollow ceramic microspheres, 5-9 parts of aluminum silicate fibers, 3-6 parts of graphene, 4-8 parts of diatomite, 3-6 parts of zirconium silicate, 2-5 parts of tourmaline powder, 1-4 parts of medical stone, 0.8-2 parts of silane coupling agent, 1-3 parts of dispersing agent, 0.5-1.2 parts of thickening agent, 0.5-1 part of defoaming agent, 0.4-0.8 part of preservative and 18-32 parts of water;

the synthetic method of the modified styrene-acrylic emulsion comprises the following steps: (1) weighing raw materials in parts by weight respectively for later use, wherein the raw materials comprise 20-25 parts of styrene, 30-38 parts of ethyl acrylate, 0.4-0.6 part of ammonium persulfate, 1.5-2.5 parts of emulsifier, 0.32-0.4 part of sodium bicarbonate, 6-12 parts of waterborne polyurethane and 60-80 parts of water; (2) mixing styrene, ethyl acrylate, ammonium persulfate, an emulsifier, sodium bicarbonate and half of water, and stirring at a high speed for emulsification for 15-30min to obtain a pre-emulsion; (3) adding the waterborne polyurethane and the other half of water into a reactor, introducing nitrogen for protection, heating to 75-85 ℃, then slowly adding the pre-emulsion, reacting for 3.5-5h, cooling and discharging to obtain the polyurethane modified styrene-acrylic emulsion.

The further improvement is that: the emulsifier is formed by mixing sodium dodecyl sulfate and tween-80 in any ratio.

The further improvement is that: the dispersing agent is any one of acrylate block polymer and polyacrylate dispersing agent.

The further improvement is that: the thickening agent is any one of sodium carboxymethylcellulose, polyacrylamide and polyurethane associated thickening agent.

The further improvement is that: the defoaming agent is an organic silicon defoaming agent or a polyether defoaming agent.

The further improvement is that: the preservative is any one of cason and 1, 2-benzisothiazolin-3-one.

The invention also provides a preparation method of the interior wall heat-insulating coating, which comprises the following steps:

s1, mixing hollow ceramic microspheres, aluminum silicate fibers, graphene, diatomite, zirconium silicate, tourmaline powder, medical stone, a silane coupling agent, a dispersing agent, a defoaming agent and water, stirring uniformly, transferring into a grinding cylinder body, and grinding until the fineness is less than or equal to 20 microns;

s2, adding the modified styrene-acrylic emulsion, the silicone-acrylic emulsion, the aluminum dihydrogen phosphate, the thickening agent and the preservative, and stirring and mixing uniformly to obtain the interior wall heat-insulating coating.

By adopting the technical scheme, the invention has the beneficial effects that:

the styrene-acrylic emulsion has good adhesive force, and a paint film is transparent and has good water resistance, aging resistance, water resistance and alkali resistance. The waterborne polyurethane has excellent mechanical properties, good elasticity and wear resistance, softness after film forming and good extensibility, and the polyurethane graft modified styrene-acrylic emulsion is obtained through emulsion polymerization, so that the comprehensive properties of the styrene-acrylic emulsion are improved, and the waterborne polyurethane has the characteristics of the styrene-acrylic emulsion and the advantages of the waterborne polyurethane. The silicone-acrylate emulsion is an emulsion polymerized by a core-shell coating process, and combines the high temperature resistance, weather resistance, chemical resistance, hydrophobicity, low surface energy and low pollution resistance of organic silicon and the high color retention, flexibility and adhesiveness of acrylic resin. The modified styrene-acrylic emulsion and the silicone-acrylic emulsion are compounded to be used as a film forming base material, and the formed coating has strong adhesive force, is waterproof and stain resistant, has good toughness and is not easy to crack, so that the service life of the wall is greatly prolonged. The invention ensures the heat preservation and insulation effect of the coating by reducing the heat conductivity coefficient of the coating and improving the light reflectivity. The hollow ceramic microspheres are spherical particles, contain cavities, are added into a coating system, and have special hollow structures, so that heat energy transfer is hindered, and the heat conductivity coefficient of the coating is reduced; the hollow ceramic microspheres also have the advantage of high light reflectivity, and the light reflectivity of the coating can be improved. In addition, the hollow ceramic microspheres can also increase the fluidity of a coating system, so that the coating is easier to apply. The aluminum silicate fiber belongs to a blocking type filler, has the advantages of low heat conductivity coefficient, light volume weight, high elasticity, good thermal stability and chemical stability and the like, is matched with the hollow ceramic microspheres for use, greatly reduces the heat conductivity coefficient of the coating, and realizes effective blocking of heat conduction; meanwhile, the toughness of the coating is improved, so that the coating is not easy to crack. Zirconium silicate has a high refractive index and poor thermal conductivity, and can further improve the light reflectance of the coating. The addition of a certain amount of aluminum dihydrogen phosphate can enhance the bonding force among the components of the coating. The graphene has excellent performance, can form a compact network structure when the coating is dried, enhances the adhesive force between the graphene and a base material, and forms a coating with excellent mechanical property; the silane coupling agent is added, so that the agglomeration phenomenon of graphene can be avoided, and the graphene and other solid components are uniformly dispersed in the emulsion. The diatomite is added, so that the bonding force of the coating can be improved, the drying speed of the coating is accelerated, and the diatomite has the function of strongly adsorbing harmful gases in the air and improving the indoor air quality due to the unique pore structure; the diatomite has low heat conductivity coefficient, and can also enhance the heat preservation and insulation effect of the coating. The spongy porous structure of the medical stone has strong adsorption effect on bacteria; the tourmaline powder has the unique properties of far infrared radiation and negative ion release, so that the coating has the health-care effect. The preparation method of the interior wall heat-insulating coating is simple, and the prepared coating is uniform and stable in property.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.