CN114574087A - Environment-friendly water-based paint and preparation method thereof - Google Patents
Environment-friendly water-based paint and preparation method thereof Download PDFInfo
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- CN114574087A CN114574087A CN202210318026.5A CN202210318026A CN114574087A CN 114574087 A CN114574087 A CN 114574087A CN 202210318026 A CN202210318026 A CN 202210318026A CN 114574087 A CN114574087 A CN 114574087A
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Abstract
The invention relates to an environment-friendly water-based paint which is characterized by being prepared from the following raw materials in parts by mass: 35-40 parts of waterborne polyurethane resin, 12-20 parts of waterborne acrylic resin, 18-26 parts of sodium silicate, 20-30 parts of powder filler, 45-65 parts of deionized water, 0.2-0.8 part of defoaming agent, 2-5 parts of film forming agent, 2-4 parts of dispersing agent, 18-25 parts of additive and 1-3 parts of thickening agent. By adopting the technical scheme, the invention provides the environment-friendly water-based paint, the water-based paint is improved to be water-resistant and strong in adhesive force, and the prepared water-based paint can reduce the harm to users and reduce the toxicity.
Description
Technical Field
The invention relates to the technical field of paint, in particular to environment-friendly water-based paint and a preparation method thereof.
Background
Paint is a chemical mixture coating that can be firmly covered on the surface of an object for protection, decoration, marking and other special purposes. The paint has the characteristics of strong hardness, high paint film fullness, wide construction and the like, and is the first choice for decoration of many people. Many consumers are still unaware of paints. The paint can only be used after one month after being painted, the paint is not toxic when the paint is considered by consumers, the paint is wrong, no pungent smell is generated, only formaldehyde is volatilized to a degree that the human physiology can accept, benzene, toluene and free TDI contained in the paint curing agent and the diluent are volatilized, the complete volatilization of the substances needs at least decades, and the aromatic hydrocarbon substances have certain influence on the intelligence development of babies and unborn children.
Along with the pressure of the environmental protection policy, the environmental protection awareness of consumers is continuously improved; particularly, the VOC emission limit standard is set in provinces and cities all over the country, and the development of environment-friendly coatings such as non-solvent type coatings, water-based paints and the like is encouraged to bring opportunities.
Although the water-based paint is superior to the traditional paint in environmental protection performance, the water-based paint still has the defects of poor water resistance, easy peeling, poor fullness, poor hardness and the like. This requires technical innovation in the performance of water-based paints by water-based paint manufacturers.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides the environment-friendly water-based paint, the water-based paint is improved to be water-resistant and strong in adhesive force, and the prepared water-based paint can reduce the harm to users and reduce the toxicity.
The technical scheme of the invention is as follows: the environment-friendly water-based paint is characterized by being prepared from the following raw materials in parts by mass: 35-40 parts of waterborne polyurethane resin, 12-20 parts of waterborne acrylic resin, 18-26 parts of sodium silicate, 20-30 parts of powder filler, 45-65 parts of deionized water, 0.2-0.8 part of defoaming agent, 2-5 parts of film forming agent, 2-4 parts of dispersing agent, 18-25 parts of additive and 1-3 parts of thickening agent.
By adopting the technical scheme, the prepared water-based paint is harmless to a human body, does not pollute the environment, is plump in paint film, is glittering and translucent, has good flexibility, has the characteristics of water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, convenient use and the like, is environment-friendly and nontoxic in each component, is small in toxicity and free from harm to the human body, has better comprehensive performance and larger adhesive force with a base material due to the synergistic effect of each component, has excellent weather resistance, chemical resistance and water resistance and high gloss and color retention of water-based acrylic resin, can enable the surface of paint paper to be smooth and uniform due to the existence of a thickening agent, greatly reduces the roughness of the paint, can inhibit the generation of foams due to the addition of a defoaming agent, can reduce the surface tension of the paint, and enables the paint film to be flat, smooth and uniform due to the addition of a film forming agent, The defoaming agent and the thickening agent have excellent environmental protection performance of the components of the formula, good intersolubility with the main components, and easy dispersion in the water-based paint system of the invention, and the prepared water-based paint has even and flat paint film surface.
The invention further comprises the following steps: the waterborne polyurethane resin is prepared from raw materials of poly neopentyl glycol adipate, dimethylolpropionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylenediamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid, 12 parts of N-methylpyrrolidone and 22 parts of additive in parts by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 65-75 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant pressure funnel, finishing the addition for 1 hour, and keeping the temperature for 1 hour; then heating to 85-95 ℃, and preserving heat for 4 h;
s2: sampling to measure the NCO content, when the NCO content reaches the standard, cooling the temperature to 65-70 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 25-30 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing the acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
By adopting the further arrangement, the waterborne polyurethane resin is prepared by adopting the components and the preparation method, is simple and feasible, has low requirements on equipment and reaction conditions, is easy to obtain raw materials, has low price, is suitable for large-scale production, and ensures that the finally formed waterborne paint has the characteristics of high strength, wear resistance and scratch resistance; the wider construction latitude is obtained in the water paint spraying construction process; meanwhile, the water-based paint is prevented from sagging in the construction process and is poor in flattening property; the effects of luster and flatness of the surface of the coated object, high strength, prolonged service life and the like are achieved, and the components basically have no environmental pollution in the production process, so that the method is suitable for industrial production.
Still further arrangements of the invention are: the powder filler is one or more of wollastonite powder, calcined kaolin and sericite powder.
By adopting the above further arrangement, the wollastonite powder can enable the water-based paint to have bright tone and partial dry covering power, and is beneficial to improving the wear resistance and durability of the paint film and enhancing the hardness of the paint film, the calcined kaolin is soft and easy to disperse in water, and the wollastonite powder is characterized by high whiteness, good dispersibility, strong covering power, and sericite powder has rich elasticity, flexibility, acid resistance, alkali resistance and good chemical stability, can greatly improve the weather resistance of the paint film when used in the emulsion paint, and can prevent water vapor from penetrating, cracking and pulverization delaying, so that the powder filler adopts one or more of the materials, and the prepared water-based paint is strong in covering power, waterproof and difficult to crack after long-term use.
Still further arrangements of the invention are: the defoaming agent adopts organic silicon resin.
By adopting the above further setting, the problems of low film-forming gloss, long film-forming time and the like of the conventional waterborne polyurethane can be solved by adopting the organic silicon resin as the defoaming agent, so that the waterborne paint can be formed into a film rapidly, and the glossiness of the formed film is high.
The invention further provides that: the film forming agent is prepared from the following components in parts by mass of 0.8-1.2: 0.8-1.2 parts of propylene glycol butyl ether and propylene glycol methyl ether acetate.
By adopting the above further setting, the paint has the advantages of high boiling point, excellent environmental protection performance, good miscibility and low volatility, can form excellent continuous coating, can obviously reduce the lowest film-forming temperature of the water-based paint, and can also improve the coalescence and scrub resistance, so that the paint film has good storage stability.
The preparation method of the environment-friendly water-based paint comprises the following steps:
s1: adding 35-40 parts of waterborne polyurethane resin, 18-26 parts of sodium silicate, 12-20 parts of waterborne acrylic resin, 30-45 parts of deionized water, 18-25 parts of additive and 2-4 parts of dispersant into a reaction kettle, heating to 60-75 ℃ in a microwave mode, and stirring for 15-20 minutes at the rotating speed of 1200-1600 revolutions per minute;
s2: after the uniform dispersion and no particles are confirmed, adding 3-5 parts of organic silicon resin and 20-30 parts of powder filler, and stirring for 1 hour at the rotating speed of 800-950 revolutions per minute; then adding 2-5 parts of film forming agent, stirring for 8 hours at the rotating speed of 300-450 rpm at 100 ℃, and cooling to room temperature;
s3: adding 10-20 parts of deionized water, stirring for 2 hours at 100 ℃ under the protection of nitrogen at the rotating speed of 500 revolutions per minute, and cooling to room temperature; and finally, adding 0.2-0.8 part of defoaming agent and 1-3 parts of thickening agent, and stirring at the rotating speed of 2000 rpm for 1 hour at room temperature to obtain the environment-friendly water-based paint.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary that a person skilled in the art can realize the technical solutions, and when the technical solutions are contradictory or cannot be realized, such a combination of the technical solutions should be considered to be absent and not within the protection scope of the present invention.
Example 1
The environment-friendly water-based paint is prepared from the following raw materials in parts by mass: 35 parts of waterborne polyurethane resin, 12 parts of waterborne acrylic resin, 18 parts of sodium silicate, 20 parts of powder filler, 45 parts of deionized water, 0.2 part of defoaming agent, 2 parts of film forming agent, 2 parts of dispersing agent, 18 parts of additive and 1 part of thickening agent.
Specifically, the waterborne polyurethane resin is prepared from raw materials of poly neopentyl glycol adipate, dimethylol propionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylenediamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid and 12 parts of N-methylpyrrolidone by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 65 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant pressure funnel, finishing the adding for 1 hour, and keeping the temperature for 1 hour; then, the temperature is increased to 85 ℃, and the temperature is kept for 4 hours;
s2: sampling and measuring the NCO content, when the NCO content reaches the standard, cooling the temperature to 65 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 25 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing the acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
The powder filler is wollastonite powder.
The additive comprises octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 25:3: 6.
The defoaming agent adopts organic silicon resin.
The film forming agent is prepared from the following components in percentage by mass of 0.8: 0.8 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The dispersing agent is polyacrylic acid sodium salt.
The preparation method of the environment-friendly water-based paint comprises the following steps:
s1: adding 35 parts of waterborne polyurethane resin, 18 parts of sodium silicate, 12 parts of waterborne acrylic resin, 30 parts of deionized water, 18 parts of additive and 2 parts of dispersant into a reaction kettle, heating to 60 ℃ in a microwave mode, and stirring for 15 minutes at the rotating speed of 1200 revolutions per minute;
s2: after the uniform dispersion and no particles are confirmed, adding 20 parts of powder filler, and stirring for 1 hour at the rotating speed of 800 revolutions per minute; then adding 2 parts of film forming agent, stirring for 8 hours at 100 ℃ at the rotating speed of 300 revolutions per minute, and cooling to room temperature;
s3: adding 15 parts of deionized water, stirring for 2 hours at the rotation speed of 500 revolutions per minute under the protection of nitrogen at the temperature of 100 ℃, and cooling to room temperature; and finally, adding 0.2 part of defoaming agent and 1 part of thickening agent, and stirring at the rotating speed of 2000 rpm for 1 hour at room temperature to obtain the environment-friendly water-based paint.
Example 2
The environment-friendly water-based paint is prepared from the following raw materials in parts by mass: 37 parts of waterborne polyurethane resin, 15 parts of waterborne acrylic resin, 20 parts of sodium silicate, 22 parts of powder filler, 50 parts of deionized water, 0.4 part of defoaming agent, 3 parts of film forming agent, 2.5 parts of dispersing agent, 20 parts of additive and 1.5 parts of thickening agent.
The waterborne polyurethane resin is prepared from raw materials of poly neopentyl glycol adipate, dimethylolpropionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylenediamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid and 10 parts of N-methylpyrrolidone by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 68 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant pressure funnel, finishing the adding for 1 hour, and keeping the temperature for 1 hour; then heating the temperature to 88 ℃, and preserving the temperature for 4 hours;
s2: sampling and measuring the NCO content, when the NCO content reaches the standard, cooling the temperature to 66 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 26 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing the acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
The powder filler is composed of wollastonite powder and calcined kaolin.
The additive comprises octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 26:4: 8.
The defoaming agent adopts organic silicon resin.
The film forming agent is prepared from the following components in percentage by mass of 0.9: 1.0 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The dispersing agent is polyacrylic acid sodium salt.
The preparation method of the environment-friendly water-based paint comprises the following steps:
s1: adding 37 parts of waterborne polyurethane resin, 20 parts of sodium silicate, 15 parts of waterborne acrylic resin, 35 parts of deionized water, 20 parts of additive and 2.5 parts of dispersant into a reaction kettle, heating to 65 ℃ in a microwave mode, and stirring for 16 minutes at the rotating speed of 1300 revolutions per minute;
s2: after the uniform dispersion and no particles are confirmed, adding 22 parts of powder filler, and stirring for 1 hour at the rotating speed of 820 revolutions per minute; then adding 3 parts of film forming agent, stirring for 8 hours at the rotating speed of 330 revolutions per minute at the temperature of 100 ℃, and cooling to room temperature;
s3: adding 15 parts of deionized water, stirring for 2 hours at 100 ℃ under the protection of nitrogen at the rotating speed of 500 revolutions per minute, and cooling to room temperature; and finally, adding 0.4 part of defoaming agent and 1-3 parts of thickening agent, and stirring at the rotating speed of 2000 rpm for 1 hour at room temperature to obtain the environment-friendly water-based paint.
Example 3
The environment-friendly water-based paint is prepared from the following raw materials in parts by mass: 38 parts of waterborne polyurethane resin, 16 parts of waterborne acrylic resin, 22 parts of sodium silicate, 24 parts of powder filler, 55 parts of deionized water, 0.6 part of defoaming agent, 3.5 parts of film forming agent, 3 parts of dispersing agent, 22 parts of additive and 2 parts of thickening agent.
The waterborne polyurethane resin is prepared from raw materials of poly neopentyl glycol adipate, dimethylolpropionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylenediamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid and 12 parts of N-methylpyrrolidone by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 70 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant-pressure funnel, finishing adding the materials for 1 hour, and preserving the heat for 1 hour; then raising the temperature to 88 ℃, and preserving the temperature for 4 hours;
s2: sampling and measuring the NCO content, when the NCO content reaches the standard, cooling the temperature to 67 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 27 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing the acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
The powder filler is composed of wollastonite powder and sericite powder.
The additive comprises octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 27:5: 9.
The defoaming agent adopts organic silicon resin.
The film forming agent is prepared from the following components in percentage by mass of 1: 1 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The dispersing agent is polyacrylic acid sodium salt.
The preparation method of the environment-friendly water-based paint comprises the following steps:
s1: adding 38 parts of waterborne polyurethane resin, 22 parts of sodium silicate, 16 parts of waterborne acrylic resin, 38 parts of deionized water, 22 parts of additive and 3 parts of dispersant into a reaction kettle, heating to 68 ℃ in a microwave mode, and stirring for 18 minutes at the rotating speed of 1500 revolutions per minute;
s2: after the uniform dispersion is confirmed and no particles exist, adding 24 parts of powder filler, and stirring for 1 hour at the rotating speed of 850 revolutions per minute; then adding 3.5 parts of film forming agent, stirring for 8 hours at the rotating speed of 380 r/min and the temperature of 100 ℃, and cooling to room temperature;
s3: adding 17 parts of deionized water, stirring for 2 hours at 100 ℃ under the protection of nitrogen at the rotating speed of 500 revolutions per minute, and cooling to room temperature; and finally, adding 0.6 part of defoaming agent and 2 parts of thickening agent, and stirring at the rotating speed of 2000 rpm for 1 hour at room temperature to obtain the environment-friendly water-based paint.
Example 4
The environment-friendly water-based paint is prepared from the following raw materials in parts by mass: 39 parts of waterborne polyurethane resin, 18 parts of waterborne acrylic resin, 24 parts of sodium silicate, 26 parts of powder filler, 60 parts of deionized water, 0.7 part of defoaming agent, 4 parts of film forming agent, 3.5 parts of dispersing agent, 24 parts of additive and 2.5 parts of thickening agent.
The waterborne polyurethane resin is prepared from raw materials of poly neopentyl glycol adipate, dimethylolpropionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylenediamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid and 12 parts of N-methylpyrrolidone by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 73 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant pressure funnel, finishing the adding for 1 hour, and keeping the temperature for 1 hour; then raising the temperature to 90 ℃, and preserving the temperature for 4 hours;
s2: sampling and measuring the NCO content, when the NCO content reaches the standard, cooling the temperature to 68 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 28 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing the acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
The powder filler is composed of calcined kaolin and sericite powder.
The additive comprises octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 28:6: 7.
The defoaming agent adopts organic silicon resin.
The film forming agent is prepared from the following components in percentage by mass of 1.1: 0.9 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The dispersing agent is polyacrylic acid sodium salt.
The preparation method of the environment-friendly water-based paint comprises the following steps:
s1: adding 39 parts of waterborne polyurethane resin, 24 parts of sodium silicate, 18 parts of waterborne acrylic resin, 40 parts of deionized water, 24 parts of additive and 3.5 parts of dispersant into a reaction kettle, heating to 70 ℃ in a microwave mode, and stirring for 18 minutes at the rotating speed of 1500 revolutions per minute;
s2: after the uniform dispersion is confirmed and no particles exist, adding 26 parts of powder filler, and stirring for 1 hour at the rotating speed of 920 revolutions per minute; then adding 4 parts of film forming agent, stirring for 8 hours at the rotating speed of 420 r/min and the temperature of 100 ℃, and cooling to room temperature;
s3: adding 20 parts of deionized water, stirring for 2 hours at 100 ℃ under the protection of nitrogen at the rotating speed of 500 revolutions per minute, and cooling to room temperature; and finally, adding 0.7 part of defoaming agent and 2.5 parts of thickening agent, and stirring at the rotating speed of 2000 rpm for 1 hour at room temperature to obtain the environment-friendly water-based paint.
Example 5
The environment-friendly water-based paint is prepared from the following raw materials in parts by mass: 40 parts of waterborne polyurethane resin, 20 parts of waterborne acrylic resin, 26 parts of sodium silicate, 30 parts of powder filler, 65 parts of deionized water, 0.8 part of defoaming agent, 5 parts of film forming agent, 4 parts of dispersing agent, 25 parts of additive and 3 parts of thickening agent.
The waterborne polyurethane resin is prepared from raw materials of poly neopentyl glycol adipate, dimethylolpropionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylenediamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid and 12 parts of N-methylpyrrolidone by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 75 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant pressure funnel, finishing the adding for 1 hour, and keeping the temperature for 1 hour; then heating the temperature to 95 ℃, and preserving the heat for 4 hours;
s2: sampling and measuring the NCO content, when the NCO content reaches the standard, cooling the temperature to 70 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 30 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
The powder filler consists of wollastonite powder, calcined kaolin and sericite powder.
The additive comprises octahydroxyl cage type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 30:6: 12.
The defoaming agent adopts organic silicon resin.
The film forming agent is prepared from the following components in percentage by mass of 1.2: 0.8 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
The dispersing agent is polyacrylic acid sodium salt.
The preparation method of the environment-friendly water-based paint comprises the following steps:
s1: adding 45 parts of waterborne polyurethane resin, 26 parts of sodium silicate, 20 parts of waterborne acrylic resin, 65 parts of deionized water, 25 parts of additive and 4 parts of dispersant into a reaction kettle, heating to 75 ℃ in a microwave mode, and stirring for 20 minutes at the rotating speed of 1600 revolutions per minute;
s2: after the uniform dispersion and no particles are confirmed, adding 30 parts of powder filler, and stirring for 1 hour at the rotating speed of 950 revolutions per minute; then adding 5 parts of film forming agent, stirring for 8 hours at the rotating speed of 450 revolutions per minute at the temperature of 100 ℃, and cooling to room temperature;
s3: adding 20 parts of deionized water, stirring for 2 hours at 100 ℃ under the protection of nitrogen at the rotating speed of 500 revolutions per minute, and cooling to room temperature; and finally, adding 0.8 part of defoaming agent and 3 parts of thickening agent, and stirring at the rotating speed of 2000 rpm for 1 hour at room temperature to obtain the environment-friendly water-based paint.
Comparative example 1
The high-performance environment-friendly water-based paint of the comparative example has the same raw material composition and preparation method as those of example 1, and mainly differs in that the water-based paint does not contain an additive consisting of octahydroxy cage-type silsesquioxane, modified calcium carbonate and sodium hydroxide.
Comparative example 2
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint of the comparative example are basically similar to those of example 1, and the main difference is that the thickening agent is sodium carboxymethyl cellulose.
Comparative example 3
The raw material composition and the preparation method of the high-performance environment-friendly water-based paint of the comparative example are basically similar to those of example 1, and the main difference is that the defoaming agent is polyether modified silicone oil.
The performance of the water-based paint prepared in the embodiments 1-5 and the comparative examples 1-3 is tested according to GB/T23999-2009 waterborne wood coatings for interior decoration, and the performance results are shown in tables 1 and 2:
TABLE 1
TABLE 2
The aqueous paints obtained in examples 1 to 5 and comparative examples 1 to 3 were subjected to the relevant performance tests, and the test results and the test methods are shown in Table 1.
As can be seen from Table 1, compared with the water-based paint in the prior art, the environment-friendly water-based paint disclosed by the embodiment of the invention has the advantages of more excellent water resistance and hardness, larger adhesive force and aging resistance.
It can be seen from table 2 that it is more environmentally friendly.
According to the comparison table, the water-based paint is prepared from the following raw materials in parts by mass:
38 parts of waterborne polyurethane resin, 16 parts of waterborne acrylic resin, 22 parts of sodium silicate, 24 parts of powder filler, 34 parts of deionized water, 0.6 part of defoaming agent, 3.5 parts of film forming agent, 3.5 parts of dispersing agent and 2 parts of thickening agent.
Preferably, the powder filler consists of wollastonite powder and sericite powder.
Preferably, the additive consists of octahydroxy cage type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 27:5: 9.
Preferably, the defoaming agent is a silicone resin.
Preferably, the film forming agent is prepared from the following components in a mass ratio of 1: 1 of propylene glycol butyl ether and propylene glycol methyl ether acetate.
Preferably, the dispersant is a sodium polyacrylate salt.
The aqueous paint prepared from the components has the best performance, is harmless to human bodies, does not pollute the environment, has a plump paint film, is glittering and translucent, has good flexibility, has the characteristics of water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, convenient use and the like, is environment-friendly and nontoxic, has low toxicity, cannot harm human bodies, and has the advantages of better comprehensive performance, larger adhesive force with a base material, excellent weather resistance, chemical resistance and water resistance and high gloss and color retention due to the synergistic effect of the components.
Claims (10)
1. The environment-friendly water-based paint is characterized by being prepared from the following raw materials in parts by mass: 35-40 parts of waterborne polyurethane resin, 12-20 parts of waterborne acrylic resin, 18-26 parts of sodium silicate, 20-30 parts of powder filler, 45-65 parts of deionized water, 0.2-0.8 part of defoaming agent, 2-5 parts of film forming agent, 2-4 parts of dispersing agent, 18-25 parts of additive and 1-3 parts of thickening agent.
2. The environment-friendly water-based paint as claimed in claim 1, wherein the water-based polyurethane resin is prepared from the raw materials of poly neopentyl glycol adipate, dimethylol propionic acid, isophorone diisocyanate, N-methyl pyrrolidone, acetone, ethylene diamine and water, and is prepared by the following preparation method:
s1: under the protection of nitrogen, weighing 55 parts of neopentyl glycol adipate, 10 parts of dimethylolpropionic acid, 12 parts of N-methylpyrrolidone and 22 parts of additive in parts by weight, adding the materials into a reaction kettle, stirring the materials for 20 minutes at the temperature of 65-75 ℃ and the rotating speed of 2000 rpm to dissolve the dimethylolpropionic acid, dropwise adding isophorone diisocyanate from a constant pressure funnel, finishing the addition for 1 hour, and keeping the temperature for 1 hour; then heating to 85-95 ℃, and preserving heat for 4 h;
s2: sampling to measure the NCO content, when the NCO content reaches the standard, cooling the temperature to 65-70 ℃, adding 15 parts of acetone to adjust the viscosity, cooling the temperature to 25-30 ℃, and adding 20 parts of ice water and 3 parts of ethylenediamine under rapid stirring; and continuously dispersing for 1h at a high speed, and removing the acetone under reduced pressure to obtain the semitransparent waterborne polyurethane resin.
3. The environment-friendly water-based paint as claimed in claim 1, wherein the paint comprises, by weight, 37-39 parts of water-based polyurethane resin, 14-18 parts of water-based acrylic resin, 20-24 parts of sodium silicate, 22-28 parts of powder filler, 50-60 parts of deionized water, 0.4-0.6 part of defoaming agent, 3-4 parts of film-forming agent, 3-4 parts of dispersing agent and 1-3 parts of thickening agent.
4. The environment-friendly water-based paint according to claim 3, which is prepared from the following raw materials in parts by mass:
38 parts of waterborne polyurethane resin, 16 parts of waterborne acrylic resin, 22 parts of sodium silicate, 24 parts of powder filler, 55 parts of deionized water, 0.6 part of defoaming agent, 3.5 parts of film forming agent, 3.5 parts of dispersing agent and 2 parts of thickening agent.
5. The environment-friendly water-based paint according to claim 4, wherein the powder filler is one or more of wollastonite powder, calcined kaolin and sericite powder.
6. The environment-friendly water-based paint as claimed in claim 5, wherein the additive comprises octahydroxy cage-type silsesquioxane, modified calcium carbonate and sodium hydroxide in a mass ratio of 25-30:3-6: 6-12.
7. The environment-friendly water-based paint according to claim 6, wherein the defoaming agent is silicone resin.
8. The environment-friendly water-based paint according to claim 7, wherein the film forming agent is prepared from the following components in a mass ratio of 0.8-1.2: 0.8-1.2 parts of propylene glycol butyl ether and propylene glycol methyl ether acetate.
9. The environmentally friendly water-based paint according to claim 8, wherein the dispersant is a sodium polyacrylate salt.
10. The method for preparing an environment-friendly water-based paint according to any one of claims 1 to 9, wherein S1: adding 35-40 parts of waterborne polyurethane resin, 18-26 parts of sodium silicate, 12-20 parts of waterborne acrylic resin, 30-40 parts of deionized water, 18-25 parts of additive and 2-4 parts of dispersant into a reaction kettle, heating to 60-75 ℃ in a microwave mode, and stirring for 15-20 minutes at the rotating speed of 1200-1600 revolutions per minute;
s2: after the uniform dispersion and no particles are confirmed, adding 3-5 parts of organic silicon resin and 20-30 parts of powder filler, and stirring for 1 hour at the rotating speed of 800-950 revolutions per minute; then adding 2-5 parts of film forming agent, stirring for 8 hours at the rotating speed of 300-450 rpm at 100 ℃, and cooling to room temperature;
s3: adding 10-20 parts of deionized water, stirring for 2 hours at 100 ℃ under the protection of nitrogen at the rotating speed of 500 revolutions per minute, and cooling to room temperature; and finally, adding 0.2-0.8 part of defoaming agent and 1-3 parts of thickening agent, and stirring at the rotating speed of 2000 r/min for 1 hour at room temperature to obtain the environment-friendly water-based paint.
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| CN115449288A (en) * | 2022-09-23 | 2022-12-09 | 四川宏凯化工科技有限公司 | Environment-friendly water-based paint and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087291A (en) * | 2013-02-01 | 2013-05-08 | 陕西科技大学 | Preparation method of high solid content waterborne polyurethane |
| CN110358437A (en) * | 2019-06-19 | 2019-10-22 | 施雪丽 | A kind of high-performance environment-friendly water paint and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103087291A (en) * | 2013-02-01 | 2013-05-08 | 陕西科技大学 | Preparation method of high solid content waterborne polyurethane |
| CN110358437A (en) * | 2019-06-19 | 2019-10-22 | 施雪丽 | A kind of high-performance environment-friendly water paint and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115449288A (en) * | 2022-09-23 | 2022-12-09 | 四川宏凯化工科技有限公司 | Environment-friendly water-based paint and preparation method thereof |
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