阅读说明：本技术 一种耐水透气型水性乳液涂料及其制作方法 (Water-resistant breathable water-based emulsion coating and preparation method thereof ) 是由 陈前 孙广春 赵太航 于 2020-07-31 设计创作，主要内容包括：本发明涉及一种耐水透气型水性乳液涂料及其制作方法,包括以下重量份的组分：去离子水25～40,硅藻土15～35,环保乳液10～20,钛白粉8～23,成膜助剂10～20,硅藻岩粉8～18,重钙5～10,二氧化硅气凝胶纳米颗粒3～6,润湿剂0.1～0.2,分散剂1～2,流平剂0.2～0.5,消泡剂1.6～2.5,增稠剂1.3～2,防霉剂0.5～0.8,抗菌剂0.5～0.8。与现有技术相比,本发明产品具有调湿透气性能优异、隔热性能好等优点。(The invention relates to a waterproof breathable water-based emulsion paint and a preparation method thereof, wherein the waterproof breathable water-based emulsion paint comprises the following components in parts by weight: 25-40 parts of deionized water, 15-35 parts of diatomite, 10-20 parts of an environment-friendly emulsion, 8-23 parts of titanium dioxide, 10-20 parts of a film forming additive, 8-18 parts of diatomite powder, 5-10 parts of heavy calcium carbonate, 3-6 parts of silica aerogel nanoparticles, 0.1-0.2 part of a wetting agent, 1-2 parts of a dispersing agent, 0.2-0.5 part of a flatting agent, 1.6-2.5 parts of a defoaming agent, 1.3-2 parts of a thickening agent, 0.5-0.8 part of a mildew preventive and 0.5-0.8 part of an antibacterial agent. Compared with the prior art, the product has the advantages of excellent humidity-regulating and air-permeable performance, good heat-insulating performance and the like.)

1. The waterproof breathable water-based emulsion coating is characterized by comprising the following components in parts by weight: 25-40 parts of deionized water, 15-35 parts of diatomite, 10-20 parts of an environment-friendly emulsion, 8-23 parts of titanium dioxide, 10-20 parts of a film forming additive, 8-18 parts of diatomite powder, 5-10 parts of heavy calcium carbonate, 3-6 parts of silica aerogel nanoparticles, 0.1-0.2 part of a wetting agent, 1-2 parts of a dispersing agent, 0.2-0.5 part of a flatting agent, 1.6-2.5 parts of a defoaming agent, 1.3-2 parts of a thickening agent, 0.5-0.8 part of a mildew preventive and 0.5-0.8 part of an antibacterial agent.

2. The water-resistant breathable water-based emulsion coating according to claim 1, wherein the diatomite has a fineness of 500-800 meshes and a bulk density of 0.2-0.4 g/cm³The specific surface area is 30 to 100m²/g。

3. The water-resistant breathable water-based emulsion coating according to claim 1, wherein the environment-friendly emulsion is an odorless styrene-acrylic emulsion.

4. The water-resistant breathable water-based emulsion paint according to claim 1, wherein the titanium dioxide is rutile titanium dioxide.

5. The water-resistant breathable water-based emulsion coating of claim 1, wherein the coalescent is dicyclopentenyloxyethyl acrylate.

6. The water-resistant breathable water-based emulsion coating as claimed in claim 3, wherein the fineness of the diatomite powder is 600-1000 meshes, and the tap bulk density is 0.40-0.65 g/cm³The specific surface area is 45-90 m²/g；

The fineness of the coarse whiting is 800-1200 meshes and the bulk density is 1.3g/cm³The specific surface area is 2.5-5.0m²/g。

7. The water-resistant breathable aqueous emulsion coating of claim 1, wherein said water-resistant breathable aqueous emulsion coating is characterized byThe fineness of the silicon dioxide aerogel nano particles is 300-600 meshes, and the specific surface area is 600-800m²A porosity of 90-95%, a pore size of 5-10nm, and a density of 200kg/m³。

8. The water-resistant breathable water-based emulsion paint of claim 1, wherein the wetting agent is a silanol nonionic surfactant, the dispersing agent is a polycarboxylate sodium salt 5040, the leveling agent is acrylic resin, the defoaming agent is a polyether modified defoaming agent, the thickening agent is a polyurethane thickening agent, the mildew preventive is an OIT water-based emulsion mildew preventive, and the antibacterial agent is an electrolytic silver ion solution.

9. A method of making the water-resistant breathable aqueous emulsion coating of claim 1, comprising the steps of:

(1) preparing materials: weighing 25-40 parts by weight of deionized water, 15-35 parts by weight of diatomite, 10-20 parts by weight of environment-friendly emulsion, 8-23 parts by weight of titanium dioxide, 10-20 parts by weight of film-forming additive, 8-18 parts by weight of diatomite powder, 5-10 parts by weight of triple superphosphate, 3-6 parts by weight of silica aerogel nanoparticles, 0.1-0.2 part by weight of wetting agent, 1-2 parts by weight of dispersing agent, 0.2-0.5 part by weight of flatting agent, 1.6-2.5 parts by weight of defoaming agent, 1.3-2 parts by weight of thickening agent, 0.5-0.8 part by weight of;

(2) adding deionized water, a wetting agent, a dispersing agent, a flatting agent and a defoaming agent into a stirring tank of a high-speed dispersion machine, and stirring and dispersing for 5-7 min at the rotating speed of 600-800 r/min;

(3) adjusting the rotating speed of a stirring tank of the high-speed dispersion machine to 200 r/min-300 r/min, adding the diatomite powder, the silica aerogel nanoparticles, the diatomite, the titanium dioxide and the triple superphosphate, increasing the rotating speed to 1400 r/min-1800 r/min, and grinding and dispersing for 30 min-50 min;

(4) adjusting the rotating speed to 300 r/min-400 r/min, adding the environment-friendly emulsion, the antibacterial agent, the mildew preventive and the film forming auxiliary agent, and dispersing and stirring for 10 min-12 min;

(5) adding thickener to adjust viscosity, and filtering to obtain the final product.

10. The method for preparing a water-resistant breathable water-based emulsion coating according to claim 9, wherein the fineness of the product in the step (5) is less than 50 μm.

Technical Field

The invention relates to the technical field of water-based paint, in particular to a water-resistant breathable water-based emulsion paint and a preparation method thereof.

Background

The water-based emulsion coating takes water as a diluent, does not contain an organic solvent, mainly comprises water, pigment, emulsion, filler and various auxiliaries, does not contain toxic substances such as benzene, formaldehyde and the like, has excellent non-adhesiveness and durability, can be used on various materials such as woodware, metal, plastic, glass, building surfaces and the like, and is broken in the aspects of health and environmental protection after the development of many years.

Patent application CN201110421400.6 discloses an anionic aqueous emulsion coating comprising the following components in weight percent: 30-40% of water-based emulsion, 7-13% of filler, 13-26% of pigment, 0.2-2% of thickener, 0.05-0.2% of tripolyphosphate, 0.1-1% of mildew preventive, 5-7% of negative ion material, 0.5-2% of film-forming assistant, 0.1-1% of hydroxyethyl cellulose, 0.3-3% of auxiliary assistant and the balance of water, wherein the filler is superfine heavy calcium carbonate and/or talcum powder. The coating can emit negative ions and oxygen ions, and absorb various harmful substances such as benzene, formaldehyde, uranium and the like, so that the indoor environment is effectively purified.

However, the water-based paint mainly uses heavy calcium carbonate, talcum powder and the like as functional fillers, so that the porosity is low, the humidity-adjusting and air-permeable functions are not ideal, and the comfort level of a use space is not high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a waterproof breathable water-based emulsion coating with excellent humidity-adjusting and breathability performances and a preparation method thereof.

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

a water-resistant breathable water-based emulsion coating comprises the following components in parts by weight: 25-40 parts of deionized water, 15-35 parts of diatomite, 10-20 parts of an environment-friendly emulsion, 8-23 parts of titanium dioxide, 10-20 parts of a film forming additive, 8-18 parts of diatomite powder, 5-10 parts of heavy calcium carbonate, 3-6 parts of silica aerogel nanoparticles, 0.1-0.2 part of a wetting agent, 1-2 parts of a dispersing agent, 0.2-0.5 part of a flatting agent, 1.6-2.5 parts of a defoaming agent, 1.3-2 parts of a thickening agent, 0.5-0.8 part of a mildew preventive and 0.5-0.8 part of an antibacterial agent.

The diatomite has a fineness of 500-800 meshes and a bulk density of 0.2-0.4 g/cm³The specific surface area is 30 to 100m²(ii) in terms of/g. Main component SiO₂The coating has the characteristics of large porosity, strong absorptivity, stable chemical property, wear resistance, heat resistance and the like, and can provide excellent surface performance, capacity increase, thickening and adhesion improvement for the coating. Because of its large pore volume, the coated film can be dried more quicklyTime. The dosage of the resin can be reduced, and the cost is reduced. The diatomite has a unique porous particle structure, so that a smooth coating is highly rough, a gloss reducing effect is generated, and the bonding force between the coating and a base surface can be adjusted and balanced.

The environment-friendly emulsion is odorless styrene-acrylic emulsion, has the solid content of 40-50 wt%, is prepared by copolymerizing styrene and an acrylate monomer through emulsion, and has the advantages of good adhesive force, transparent adhesive film, water resistance, oil resistance, heat resistance and good aging resistance. The invention uses a German basf ECO338 AP odorless emulsion/ECO 559 AP odorless emulsion.

The titanium dioxide is rutile titanium dioxide, and the main component is TiO₂The white inorganic pigment has the density of 3.8-4.3, is non-toxic and non-transparent, has high whiteness and brightness, strong adhesion, acid and alkali resistance, high refractive index, good covering power, good chemical stability, good weather resistance, lower oil absorption and the like.

The film-forming assistant is tripropylene glycol n-butyl ether, and has the characteristics of safety, no toxicity, small addition amount, high drying speed and good film-forming effect.

The diatomite powder is light shale opal consisting of cristobalite, quartz phosphate and opal, white powder with the fineness of 600 meshes and the tap bulk density of 0.40-0.65 g/cm³The specific surface area is 45-90 m²(ii) in terms of/g. The diatomite is soft, rich in bedding and extremely low in strength, is earthy rock formed by piling up diatomite remains and through primary diagenesis, and is white or light yellow. The mineral component is amorphous opal, the diatomite is light and soft, can be easily ground into powder, is porous, has high porosity of about 90 percent, and has strong water absorption capacity. It is soft and light, has large porosity, obvious layering, strong absorption performance and easy breaking. The invention utilizes the advantages of large porosity, strong absorbability and stable chemical property of the diatomite, can adjust the humidity and adsorb peculiar smell.

The coarse whiting has the fineness of 8000-1200 meshes, the bulk density of 1.3g/cm3 and the specific surface area of 2.5-5.0m 2/g. The heavy calcium, i.e. ground calcium carbonate, is prepared by grinding natural carbonate minerals such as calcite, marble and limestone, is a common powdery inorganic filler, and has the advantages of high chemical purity, high inertia, difficult chemical reaction, good thermal stability, no decomposition at the temperature of below 400 ℃, high whiteness, low oil absorption rate, low refractive index, soft quality, dryness, no crystal water, low hardness, low abrasion value, no toxicity, no odor, good dispersibility and the like. The paint has wider application in the water paint industry, can ensure that the paint is not settled, is easy to disperse and has good luster.

The fineness of the silicon dioxide aerogel nano particles is 300-600 meshes, the specific surface area is 600-800m2/g, the porosity is 90-95%, the size of the holes is 5-10nm, the density is 200kg/m3, the silicon dioxide aerogel nano particles are a light nano porous amorphous solid material with excellent heat-proof and heat-insulating properties, the silicon dioxide aerogel nano particles are not decomposed at high temperature, no harmful gas is generated, and the silicon dioxide aerogel nano particles belong to green environment-friendly materials. The material has uniform pore size distribution, high porosity and CO adsorption₂The gas adsorbs chemical toxic gases such as benzene, and has good heat insulation and sound insulation effects, and when the coating is used in the coating, the heat insulation performance and the air permeability of the coating can be improved.

The wetting agent is a silanol nonionic surfactant, the dispersing agent is a polycarboxylate sodium 5040, the leveling agent is acrylic resin, the defoaming agent is a polyether modified defoaming agent, the thickening agent is a polyurethane thickening agent, the mildew preventive is OIT aqueous emulsion, and the antibacterial agent is an electrolytic silver ion solution.

Further, the invention also provides a preparation method of the water-resistant breathable water-based emulsion paint, which comprises the following steps:

(1) preparing materials: weighing 25-40 parts by weight of deionized water, 15-35 parts by weight of diatomite, 10-20 parts by weight of environment-friendly emulsion, 8-23 parts by weight of titanium dioxide, 10-20 parts by weight of film-forming additive, 8-18 parts by weight of diatomite powder, 5-10 parts by weight of triple superphosphate, 3-6 parts by weight of silica aerogel nanoparticles, 0.1-0.2 part by weight of wetting agent, 1-2 parts by weight of dispersing agent, 0.2-0.5 part by weight of flatting agent, 1.6-2.5 parts by weight of defoaming agent, 1.3-2 parts by weight of thickening agent, 0.5-0.8 part by weight of;

(2) adding deionized water, a wetting agent, a dispersing agent, a flatting agent and a defoaming agent into a stirring tank of a high-speed dispersion machine, and stirring and dispersing for 5-7 min at the rotating speed of 600-800 r/min;

(3) adjusting the rotating speed of a stirring tank of the high-speed dispersion machine to 200 r/min-300 r/min, adding the diatomite powder, the silica aerogel nanoparticles, the diatomite, the titanium dioxide and the triple superphosphate, increasing the rotating speed to 1400 r/min-1800 r/min, and grinding and dispersing for 30 min-50 min;

(4) adjusting the rotating speed to 300 r/min-400 r/min, adding the environment-friendly emulsion, the antibacterial agent, the mildew preventive and the film forming auxiliary agent, and dispersing and stirring for 10 min-12 min;

(5) adding thickener to adjust viscosity, and filtering to obtain the final product.

The product fineness in the step (5) is less than 50 mu m.

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

1. green and environment-friendly: the invention takes deionized water as a solvent, avoids the use of an organic solvent, adopts the selected emulsion as a odorless emulsion, and adopts various fillers and auxiliaries as environment-friendly materials, so that the obtained product is more environment-friendly;

2. ventilation and heat insulation: according to the invention, the raw diatomite ore and diatomite with higher porosity are utilized, the consumption of heavy calcium carbonate and talcum powder is reduced, the air permeability of the obtained product is more excellent, and the product has excellent weather resistance and heat insulation performance by utilizing a silicon dioxide aerogel technology;

3. good anti-condensation performance and strong breathing capacity: according to the invention, by utilizing the porous characteristics of the raw materials such as diatomite, diatomite and silica aerogel nanoparticles, the indoor humidity can be quickly adjusted, the wall surface does not dew under the conditions of low air pressure and high humidity, the water stored in the wall can be released under the dry condition, and the function of 'water breathing' is achieved;

4. the water resistance and the aging resistance are good: the water resistance of the product is improved by adding a proper content of dispersing agent, wetting agent, film forming additive and the like, and the product has the functions of mildew prevention and bacteriostasis by adding additives such as mildew preventive, antibacterial agent and the like.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.