WO2020232722A1

WO2020232722A1 - Water-based paint, preparation method for same, and applications thereof in manufacturing antitheft door or heating apparatus

Info

Publication number: WO2020232722A1
Application number: PCT/CN2019/088199
Authority: WO
Inventors: 袁洪青; 王立群
Original assignee: 河北比尔尼克新材料科技股份有限公司
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-11-26

Abstract

A water-based paint, a preparation method for same, and applications thereof in manufacturing an antitheft door or a heating apparatus. The water-based paint comprises a film-forming substance and an arbitrary additive. The film-forming substance comprises: a water-based organic silicon-modified acrylic resin and a resin selected from (a) or (b) shown below: (a) a water-based amino resin; and, (b) a water-based amino resin and a water-based polyurethane resin. During preparation, the film-forming substance and the arbitrary additive are stirred and mixed evenly under the condition of 1500 rpm to 2500 rpm.

Description

Water-based paint, preparation method thereof and application in preparation of anti-theft door or heating device

Technical field

The present disclosure relates to the technical field of coatings, in particular to a water-based coating, a preparation method thereof, and application in the preparation of anti-theft doors or heating devices.

Background technique

Coating is a new type of polymer material, which has the characteristics of uniformly attaching to the surface of the substrate material to form a strong and non-cracking film. The coating is widely transported to the fields of decoration and protection. Traditional coatings use organics as solvents, which will release volatile organic compounds (VOC) during processing and production, which will pollute the environment and have a negative impact on human health and the environment. Long-term living in an environment with excessive VOC can cause harms such as headache, insomnia, and memory loss. Especially with the increasing popularity of green environmental protection, many industries are in a state of suspension due to excessive paint pollution, especially in the heating facilities and anti-theft door industries. At present, most of the coatings sprayed with protective paint for heating facilities and anti-theft doors are highly polluting The paint has poor weather resistance and is easy to fall off the whole sheet. It needs high temperature baking after spraying, which is a backward and highly polluting material. In order to ensure smooth production, low-emission, environmentally friendly and long-lasting coating products are becoming more and more popular.

Powder coatings do not contain organic solvents or water, and are produced and painted in a solid powder state. Although powder coatings have many advantages, they also have some defects. Special equipment is required for spraying to increase production costs, and the curing temperature is relatively high. It can only be used on heat-resistant substrates such as metals, but not on substrates that are not heat-resistant, such as wood and plastics; it is difficult to control the flatness of the coating film of powder coatings, and it is prone to shrinkage, orange peel and other problems; powder coatings After spraying, it needs to be baked at a high temperature for a long time, which is a high-energy-consuming and resource-wasting coating; a large amount of dust is generated during the spraying process of powder coatings, causing harm to the human body, and the incidence of occupational diseases is very high; the weather resistance of powder coatings is poor and during use Easy to fall off.

Water-based paint is a kind of paint that uses water-soluble or water-dispersible resin as the main film-forming substance and water as the solvent. Water-based paints mainly use water as solvent or dispersant, which reduces or even avoids the use of organic solvents, which can greatly reduce VOC emissions, and water-based paints have low construction requirements. However, water-based coatings have poor anti-corrosion and weather resistance properties, and are not as good as coatings and powder coatings that use organic solvents as solvents. Therefore, a water-based paint that can not only reduce the VOC emission of the paint and the energy consumption during use, but also has good performance, is currently needed by the market.

In view of this, this disclosure is hereby provided.

Public content

The first objective of the present disclosure is to provide a water-based paint to alleviate the lack of a water-based paint that can reduce the VOC emission of the paint and the energy consumption during use, and also has good performance in the prior art.

The second objective of the present disclosure is to provide a method for preparing the above-mentioned water-based paint, which is simple to operate and suitable for wide use.

The third objective of the present disclosure is to provide the application of the above-mentioned water-based paint or the preparation method of the above-mentioned water-based paint in the preparation of anti-theft doors.

The fourth objective of the present disclosure is to provide the application of the above-mentioned water-based paint or the preparation method of the above-mentioned water-based paint in the preparation of heating devices.

In order to solve the above technical problems, the present disclosure adopts the following technical solutions:

According to one aspect of the present disclosure, the present disclosure provides a water-based coating, the water-based coating includes a film-forming substance and optional auxiliary agents; the film-forming substance of the water-based coating includes the following components: water-based silicone modified acrylic Resin, and a resin selected from the following (a) or (b):

(a) Water-based amino resin;

(b) Water-based amino resin and water-based polyurethane resin.

Preferably, the film-forming substance of the water-based paint includes water-based silicone modified acrylic resin and water-based amino resin; taking the total mass percentage of each component of the water-based paint as 100%, the amount of water-based silicone modified acrylic resin is 50%～60%, the amount of water-based amino resin is 6%～12%;

Preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 52% to 60%, and the amount of water-based amino resin is 7% to 10%;

More preferably, the total mass percentage of the components of the water-based coating is 100%, the amount of the water-based silicone modified acrylic resin is 55% to 60%, and the amount of the water-based amino resin is 8% to 9%;

Preferably, the auxiliary agent includes an anti-flash rust agent;

Preferably, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the anti-flash rust agent is 0.5% to 5%, preferably 1% to 3%, more preferably 1% to 2% .

Preferably, the film-forming substance of the water-based coating includes water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin;

Preferably, the water-based polyurethane resin includes aliphatic polyester polyurethane;

Preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 40%-50%, the amount of water-based amino resin is 5%-8%, and the amount of water-based polyurethane resin The dosage is 8%～12.5%;

Preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 42%-50%, the amount of water-based amino resin is 5.5%-8%, and the amount of water-based polyurethane resin The dosage is 9%～12%;

More preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 45% to 50%, and the amount of water-based amino resin is 6% to 7%. The amount of resin is 10%-11%;

Preferably, the auxiliary agent includes an anti-flash rust agent;

Preferably, the sum of the mass percentages of the components of the water-based paint is 100%, and the amount of the anti-flash rust agent is 1% to 5%, preferably 1.5% to 4%, more preferably 2% to 3% .

Preferably, the water-based paint further includes a pigment; preferably, the pigment includes an organic pigment;

Preferably, the organic pigment includes an aqueous organic color paste;

Preferably, the sum of the mass percentages of the components of the water-based paint is 100%, and the amount of the water-based organic colorant is 12%-18%, preferably 13%-16.5%, more preferably 14%-15% .

Preferably, the auxiliary agent includes at least one of a dispersant, a leveling agent and a defoamer;

Preferably, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the dispersant is 1% to 4%, preferably 1.5% to 3.5%, more preferably 2% to 3%;

Preferably, the total mass percentage of the components of the water-based coating is 100%, and the amount of the leveling agent is 1% to 6%, preferably 1.5% to 5.5%, more preferably 2% to 5%;

Preferably, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the defoamer is 0.5% to 2.5%, preferably 1% to 2.5%, more preferably 1% to 2%.

Preferably, by mass percentage, the water-based paint includes the following components: water-based silicone modified acrylic resin 55% to 60%, water-based amino resin 8% to 9%, water-based organic color paste 14% to 15%, and Flash rust agent 1%-2%, dispersant 2%-3%, leveling agent 2%-5% and defoamer 1-2%, the balance is water; preferably, the water includes deionized water.

Preferably, in terms of mass percentage, the water-based paint includes the following components: water-based silicone modified acrylic resin 45% to 50%, water-based amino resin 6% to 7%, water-based polyurethane resin 10% to 11%, water-based organic Color paste 14% to 15%, anti-flash rust agent 2% to 3%, dispersant 2% to 3%, leveling agent 2% to 5% and defoaming agent 1% to 2%, the balance is water; preferably Preferably, the water includes deionized water.

According to another aspect of the present disclosure, the present disclosure also provides a preparation method of the above-mentioned water-based paint, the preparation method comprising: a water-based silicone-modified acrylic resin and a resin selected from the following (a) or (b):

(a) Water-based amino resin;

(b) Water-based amino resin and water-based polyurethane resin;

And, optional additives, mix uniformly according to the formula amount;

Preferably, the uniform mixing includes stirring and mixing at a rotation speed of 1500 rpm to 2500 rpm; the rotation speed is preferably 1800 rpm to 2200 rpm; more preferably 2000 rpm.

According to another aspect of the present disclosure, the present disclosure also provides the application of the above-mentioned water-based paint in the preparation of anti-theft doors.

According to another aspect of the present disclosure, the present disclosure also provides the application of the above-mentioned water-based paint in the preparation of heating devices.

Compared with the prior art, the present disclosure has the following beneficial effects:

In the water-based paint provided in the present disclosure, the water-based silicone modified acrylic resin has good film-forming properties, weather resistance and aging resistance; the amino resin can be cross-linked with the water-based silicone modified acrylic resin to form a tough three-dimensional network structure The coating film can further improve the weather resistance and aging resistance of the film-forming material; the waterborne polyurethane resin has chemical resistance, abrasion resistance and good mechanical properties. The water-based paint provided by the present disclosure is particularly suitable for coating anti-theft doors and radiators as substrates.

When the combination of water-based silicone modified acrylic resin and water-based amino resin is used as the film-forming material, it is especially suitable for the anti-theft door as the substrate and the water-soluble silicone modified acrylic resin as the main raw material. Compared with similar products, the performance has better adhesion and hardness, which can extend the use time of the security door and alleviate the problem of the existing security door powder coating after being sprayed in less than 2 years. The water-based coating also has the beneficial effects of good corrosion resistance, resistance to falling off, low VOC emission and low energy consumption. Based on this concept, the present disclosure also provides the application of the water-based coating in the preparation of anti-theft doors.

When water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin are used as film-forming materials, the addition of water-based polyurethane resin with chemical resistance, abrasion resistance and good mechanical properties further improves the performance of water-based coatings. Performance improves the temperature resistance and water resistance of water-based coatings, making it stronger and harder. The water-based paint under this formula is particularly suitable for heating devices as the substrate. The heating device includes, but is not limited to, radiators, heating pipes, and any components that require long-term heat resistance during the heating process. The water-based paint under this formula has a long-term temperature resistance of 100°C, and does not fall off when exposed to water, prolongs the use time of the heating device, and alleviates the problem of long-term temperature resistance and easy fall off in the process of using traditional radiator powder coatings. In addition, when the water-based paint is coated on the surface of the heating device, the baking temperature and time can be reduced, and environmental pollution can be reduced; the water-based paint also has the beneficial effects of good weather resistance, good corrosion resistance, resistance to falling off, strong adhesion, and low VOC emission. Based on this concept, the present disclosure also provides the application of the water-based coating in the preparation of heating devices.

The present disclosure also provides a method for preparing the above-mentioned water-based coating, which method comprises mixing water-based silicone-modified acrylic resin and a resin selected from the following (a) or (b): (a) water-based amino resin; (b) water-based Amino resin and water-based polyurethane resin; and optional additives, mix uniformly according to the formula. The preparation method is simple to operate, does not require specific equipment, and is widely used.

Detailed ways

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with embodiments. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In this disclosure, if there is no special description, all the embodiments and preferred implementation methods can be combined with each other to form a new technical solution; all technical features and preferred features can be combined with each other to form a new technical solution; the involved components or their preferred The components can be combined with each other to form a new technical solution.

In the present disclosure, unless otherwise specified, the numerical range "a-b" represents an abbreviated representation of any combination of real numbers between a and b, where both a and b are real numbers. For example, the numerical range "50～65" means that all the real numbers between "50～65" have been listed in this article, and "50～65" is only an abbreviation of the combination of these numbers; and the "range" has the lower limit and upper limit The form can be one or more lower limits, and one or more upper limits.

In the present disclosure, unless otherwise specified, each reaction or operation step can be carried out sequentially or out of order. The professional and scientific terms used in this article have the same meaning as those familiar to those skilled in the art. In addition, any method or material similar or equivalent to the recorded content can also be applied in the present disclosure.

The present disclosure provides an aqueous coating, which includes a film-forming substance and optional auxiliary agents. A film-forming substance refers to a component that has the ability to adhere to a substance to form a film. The film-forming substance of the water-based coating includes the following components: water-based silicone modified acrylic resin, and selected from the following (a) or (b) Resins shown: (a) water-based amino resin; (b) water-based amino resin and water-based polyurethane resin.

Aqueous silicone-modified acrylic resin refers to an acrylic resin modified by silicone that can be dissolved or dispersed in water. Copolymers of vinyl monomers such as acrylate, methacrylate and styrene are called acrylic resins. Acrylic emulsion has the advantages of weather resistance, good aging resistance, gloss retention, high gloss, excellent adhesion, fine appearance and good film-forming properties. Aqueous acrylic resin refers to acrylic resin that can be dispersed or dissolved in water, and mainly includes water emulsion type and water dispersion type. Monomers for synthesizing water-based acrylic resins include, but are not limited to, one or more of methacrylic acid, hydroxyethyl methacrylate, butyl acrylate, butyl methacrylate, acrylic acid, hydroxyethyl acrylate, and methyl methacrylate Kind.

Organosilicon refers to an organic compound that contains silicon-oxygen bonds in the main chain of the molecule, and at least one silicon atom in the main chain is connected to an organic group. Silicone modified acrylic emulsion uses the high and low temperature resistance and good water resistance of polysiloxane to improve the performance of acrylic emulsion, and synthesizes a coating emulsion with the advantages of both. The acrylic emulsion grafted with silicone has good film-forming properties, mechanical strength and aging resistance. At the same time, its elasticity and low temperature flexibility are greatly increased, and it has better adhesion, water resistance, weather resistance, and light resistance. , Comprehensive performance of oxidation resistance, gloss retention, stain resistance and chalking resistance. Silicones used to modify water-borne acrylic resins include, but are not limited to, vinyl trimethyl(eth)oxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ- One or more of (methacryloxy)propyltrimethoxysilane, vinyltriethylphthaloyloxysilane, and γ-mercaptopropyltrimethoxysilane.

Amino resin is a product obtained by polycondensation reaction of amino compound and aldehyde, and then partially etherified or fully etherified with aliphatic monohydric alcohol. Amino resin is a multifunctional polymer that can be cross-linked with various types of resins to form a tough three-dimensional network structure coating film, and the coating film can have excellent gloss, color retention, hardness, chemical resistance, Water resistance and weather resistance. Amino resins also have good miscibility. Aqueous amino resin refers to an amino resin that can be dissolved or dispersed in water. The water-based amino resin includes but is not limited to one or more of melamine resin, urea resin and urea glyoxal resin.

Aqueous polyurethane resin refers to a binary colloidal system formed by dissolving or dispersing polyurethane resin in water. Polyurethane resins are generally polymerized by compounds containing two or more isocyanate groups (-NCO groups) and compounds containing two or more active hydrogen; polyurethane resins contain a considerable amount of ammonia, as well as ether bonds and esters. Bond, urea bond, allophanate bond, etc. The water-based polyurethane resin is dissolved or dispersed in water to form an aqueous dispersion, which is non-flammable, non-toxic, non-polluting, low in VOC content, chemical resistance, abrasion resistance and good mechanical properties.

Among them, the water-based polyurethane resin is preferably aliphatic polyester polyurethane. The aliphatic polyester polyurethane is a polyurethane resin synthesized from aliphatic monomers. It has excellent wear resistance and good adhesion, and the film is thick and glossy. The advantages of high degrees.

The "optional adjuvant" in the present disclosure means that the components of the water-based coating provided in the present disclosure may or may not include an adjuvant; it is understood that when the water-based paint includes an adjuvant , May include conventional auxiliary agents in the art. In some optional embodiments, the auxiliary agents include but are not limited to wetting agents, dispersants, defoamers, defoamers, emulsifiers, antistatic agents, Thickener, anti-settling agent, anti-skinning agent, bactericidal preservative, pH regulator, pigment stabilizer, adhesion promoter, matting agent, rust inhibitor, leveling agent, anti-sagging agent, anti-flash rust agent, One or more of drier, curing agent, ultraviolet absorber, light stabilizer, scratch preventer, anti-blocking agent, anti-fouling agent, antifouling agent and flame retardant.

In the water-based paint provided by the present disclosure, when a combination of water-based silicone-modified acrylic resin and water-based amino resin is used as a film-forming substance, the water-based silicone-modified acrylic resin has good film-forming properties, weather resistance and aging resistance; amino resin It can be cross-linked with water-based silicone modified acrylic resin to form a tough three-dimensional network structure coating film to further improve the weather resistance and aging resistance of the film-forming material; when using water-based silicone modified acrylic resin, water-based amino resin When water-based polyurethane resin is used as a film-forming substance, the addition of water-based polyurethane resin with chemical resistance, abrasion resistance and good mechanical properties further improves the performance of water-based coatings, and improves the temperature resistance and water resistance of water-based coatings. It has better adhesion and hardness. The water-based paint provided by the present disclosure has the beneficial effects of good weather resistance, good corrosion resistance, temperature resistance, resistance to falling off, strong adhesion, low VOC emission and low energy consumption.

In some optional embodiments, the film-forming substance of the water-based coating includes water-based silicone modified acrylic resin and water-based amino resin; the total mass percentage of each component of the water-based coating is 100%, and the water-based silicone modified The amount of acrylic resin is 50%-60%, for example, but not limited to 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59% or 60%. %; the amount of water-based amino resin is 6%-12%; for example, it can be, but not limited to, 6%, 7%, 8%, 9%, 10%, 11% or 12%. By optimizing the amount of water-based silicone modified acrylic resin and water-based amino resin, the performance of water-based coatings can be further optimized.

In some preferred embodiments, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 52% to 60%, and the amount of water-based amino resin is 7% to 10%. %.

In some more preferred embodiments, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 55%-60%, and the amount of water-based amino resin is 8%- 9%.

In some optional embodiments, the film-forming substance of the water-based coating includes water-based silicone modified acrylic resin, water-based amino resin, and water-based polyurethane resin; the sum of the mass percentages of the components of the water-based coating is 100%, The amount of water-based silicone modified acrylic resin is 40%-50%, for example, but not limited to 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, or 50%; the amount of water-based amino resin is 5%-8%, such as but not limited to 5%, 5.5%, 6%, 6.5%, 7%, 7.5% or 8%; water-based polyurethane resin The amount used is 8% to 12.5%, for example, but not limited to 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12% or 12.5%. By optimizing the amount of water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin, the performance of water-based coatings can be further optimized.

In some preferred embodiments, the total mass percentage of the components of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 42% to 50%, and the amount of water-based amino resin is 5.5% to 8. %, the amount of water-based polyurethane resin is 9%-12%.

In some more preferred embodiments, the sum of the mass percentages of the components of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 45%-50%, and the amount of water-based amino resin is 6%- 7%, the amount of water-based polyurethane resin is 10%-11%.

In some optional embodiments, the water-based paint further includes a pigment: a pigment is a colored substance that is insoluble in film-forming substances, insoluble in a dispersion medium, and is a type of substance characterized by its "particles" showing its color. . Pigments can not only provide color decoration for the coating film, but also provide coatings with improvements in hiding, light resistance, weather resistance, temperature resistance, gloss and mechanical strength. Because inorganic pigments contain heavy metals, such as lead, cadmium, tin, and chromate, they often have toxic effects. Therefore, in some preferred embodiments, organic pigments are used in the water-based coatings, and the chemical structure of organic pigments is relatively stable and has toxic side effects. Lower. Those skilled in the art can select specific types of organic pigments according to the color to be exhibited by the water-based paint, which is not limited in the present disclosure. The organic pigments can be, for example, but not limited to, monoazo pigments, bisazo pigments, azo condensation pigments, phthalocyanine pigments, quinacridone pigments, dioxin pigments, pyrrolopyrrole two One or more of ketone pigments or thioindigo pigments.

Traditional pigments are usually in a fine powder state, which is dusty when used, pollutes the environment, and is inconvenient for color matching. Therefore, in some preferred embodiments, the water-based paint preferably uses a water-based organic colorant. The water-based organic colorant refers to It is an organic pigment concentrate with water as the dispersion medium. Using water-based organic color paste as the pigment is convenient to use and can make the pigment more uniform and stable dispersion in the water-based paint.

In some preferred embodiments, the total mass percentage of each component of the water-based paint is 100%, and the amount of the water-based organic colorant is 12%-18%, for example, it can be but not limited to 12%, 12.5 %, 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, 16%, 16.5%, 17%, 17.5% or 18%; preferably 13% to 16.5%, more preferably 14% to 15 %. By adjusting the amount of water-based organic colorant, the color of the water-based paint can be optimized, and the performance of the water-based paint can be partially improved.

In some preferred embodiments, the auxiliary agent includes an anti-flash rust agent. Flash rust is the phenomenon of corrosion on the metal surface during the film-forming and drying process of water-based paint. Since the water-based paint uses water as the solvent, when the water-based paint is applied to the metal surface, when the water in the paint contacts the metal product, the water and oxygen undergo a proton transfer reaction on the metal surface, causing flash rust. The water-based paint can choose anti-flash rust agents commonly used in the art, and the present disclosure does not limit this. The anti-flash rust agent includes, but is not limited to, one or more of inorganic salt anti-flash rust agent, organic amine type anti-flash rust agent and chelating type anti-flash rust agent.

In some optional embodiments, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the anti-flash rust agent is 0.5% to 5%, for example, it can be but not limited to 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5%. The anti-flash repair performance of water-based paint can be optimized by adjusting the amount of anti-flash rust agent.

In some preferred embodiments, when the film-forming substance of the water-based paint includes water-based silicone modified acrylic resin and water-based amino resin; and the total mass percentage of each component of the water-based paint is 100%, the water-based silicone When the amount of modified acrylic resin is 50%-60%, and the amount of water-based amino resin is 6%-12%, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the anti-flash rust agent It is 0.5% to 5%, preferably 1% to 3%, more preferably 1% to 2%.

In some other preferred embodiments, when the film-forming substance of the water-based paint includes water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin, and the sum of the mass percentages of the components of the water-based paint is 100%, when the amount of water-based silicone-modified acrylic resin is 40%-50%, the amount of water-based amino resin is 5%-8%, and the amount of water-based polyurethane resin is 8%-12.5%, each group of water-based coatings The sum of the mass percentages of the components is 100%, and the amount of the anti-flash rust agent is 1% to 5%, preferably 1.5% to 4%, more preferably 2% to 3%.

In some preferred embodiments, the auxiliary agent includes at least one of a dispersant, a leveling agent and a defoaming agent. In a specific example, the auxiliary agent includes a dispersant; in a specific example , The auxiliary agent includes a leveling agent; in a specific example, the auxiliary agent includes a defoaming agent; in a specific example, the auxiliary agent includes a dispersing agent and a leveling agent; in a specific example In a specific example, the auxiliary agent includes a dispersant and a defoaming agent; in a specific example, the auxiliary agent includes a leveling agent and a defoaming agent; in a specific example, the auxiliary agent includes a dispersant, a defoamer Foaming agent and leveling agent.

The dispersant can be adsorbed on the pigments and/or fillers, forming a charge effect or steric hindrance effect on the surface, so that the dispersion is in a stable state, preventing floating, flocculation and precipitation. The water-based coating can be a dispersant commonly used in this field, and the present disclosure does not limit this. The dispersant can be, for example, but not limited to, tripolyphosphates, silicates, metasilicates, polyacrylates, polycarboxylates, naphthalenesulfonate condensation polymers or polyisobutylene butylene Alkenate and so on.

In some preferred embodiments, the total mass percentage of the components of the water-based coating is 100%, and the amount of the dispersant is 1% to 4%, for example, it can be, but not limited to, 1%, 1.5%, 2%, 2.5%, 3%, 3.5% or 4%; preferably 1.5% to 3.5%, more preferably 2% to 3%. By optimizing the amount of dispersant, the pigments, or other fillers and additives in the water-based paint can be dispersed more uniformly, so as to further improve the performance of the water-based paint.

One of the main functions of the coating film is protection and decoration. If the surface condition of the coating film is not good, the protection and decoration of the coating film may be weakened or missing. The leveling agent can be oriented to the liquid/gas surface. The water-based coating can be a leveling agent commonly used in the art, which is not limited in the present disclosure. The leveling agent may be, for example, but not limited to, urea-formaldehyde resin, melamine-formaldehyde resin, polydimethylsiloxane, polymethylphenylsiloxane, or polyether polyester modified siloxane.

In some preferred embodiments, the total mass percentage of each component of the water-based coating is 100%, and the amount of the leveling agent is 1% to 6%, for example, it can be, but not limited to, 1%, 1.5% , 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5% or 6%; preferably 1.5% to 5.5%, more preferably 2% to 5%. By adjusting the amount of leveling agent, the leveling performance of the water-based coating and the flatness of the coating film after application can be further improved.

Antifoaming agent is a kind of surface active agent, which works at the air/liquid interface and can eliminate the foam generated during paint production and construction. Compared with traditional solvent-based coatings, water-based coatings are easier to foam and are difficult to eliminate; and because water-based coatings are prone to turbulence, splashing, impact, and air pockets during the preparation process, a large number of bubbles are generated, so adding defoamers is useful Helps reduce foam in water-based coating systems and improve the quality of water-based coatings. The water-based paint can be selected from defoamers commonly used in the art. The present disclosure does not limit this. The defoamers can be, but not limited to, waxes, silicone oils, macromolecular polyethylene glycols or polyureas or polyureas. Methylsiloxane, etc.

In some optional embodiments, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the defoaming agent is 0.5% to 2.5%, for example, it can be but not limited to 0.5%, 1 %, 1.5%, 2% or 2.5%; preferably 1% to 2.5%, more preferably 1% to 2%. By adjusting the amount of defoamer, the bubbles in the water-based paint can be further reduced, and the quality of the water-based paint and the quality of the coating film after application can be improved.

When the present disclosure uses the combination of water-based silicone-modified acrylic resin and water-based amino resin as the film-forming substance, the water-based silicone-modified acrylic resin has good film-forming properties, weather resistance and aging resistance; the amino resin can be combined with water-based silicone The modified acrylic resin is cross-linked into a coating film with a tough three-dimensional network structure to further improve the weather resistance and aging resistance of the film-forming material. When the combination of water-based silicone modified acrylic resin and water-based amino resin is used as the film-forming material, it is especially suitable for the anti-theft door as the substrate and the water-soluble silicone modified acrylic resin as the main raw material. Compared with similar products, the performance has better adhesion and hardness, which can extend the use time of the security door and alleviate the problem of the existing security door powder coating after being sprayed in less than 2 years. The water-based coating also has the beneficial effects of good corrosion resistance, resistance to falling off, low VOC emission and low energy consumption.

In some preferred embodiments, the water-based paint having the following components and the components formulated according to the following formula amounts, with the anti-theft door as the substrate, has a better coating effect: in terms of mass percentage, the water-based paint includes the following components Points: water-based silicone modified acrylic resin 55%～60%, water-based amino resin 8%～9%, water-based organic color paste 14%～15%, anti-flash rust agent 1%～2%, dispersant 2%～3 %, leveling agent 2% to 5% and defoaming agent 1 to 2%, the balance is water, of which deionized water with less impurities is preferred to avoid ionic impurities in the water from affecting the composition of the water-based paint Features. The water-based paint provided by this embodiment can be baked at a temperature of about 150° C. for 30 minutes to form a film, which reduces the spraying temperature and time.

When water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin are used as film-forming materials, the addition of water-based polyurethane resin with chemical resistance, abrasion resistance and good mechanical properties further improves water-based coatings. The performance of water-based coatings improves the temperature resistance and water resistance of water-based coatings, making it stronger and harder. The water-based paint under this formula is particularly suitable for heating devices as the substrate. The heating device includes, but is not limited to, radiators, heating pipes, and any components that require long-term heat resistance during the heating process. The water-based paint under this formula has a long-term temperature resistance of 100°C, and does not fall off when exposed to water, prolongs the use time of the heating device, and alleviates the problem of long-term temperature resistance and easy fall off in the process of using traditional radiator powder coatings. In addition, when the water-based paint is applied on the surface of the heating device, the baking temperature and time can be reduced, and environmental pollution can be reduced; the water-based paint also has the beneficial effects of good corrosion resistance, resistance to falling off, strong adhesion, high hardness and low VOC emissions.

In some preferred embodiments, the water-based paint having the following components and the components formulated according to the following formula amounts, and the heating device as the substrate, the coating effect is better: in terms of mass percentage, the water-based paint includes the following groups Points: water-based silicone modified acrylic resin 45%～50%, water-based amino resin 6%～7%, water-based polyurethane resin 10%～11%, water-based organic color paste 14%～15%, anti-flash rust agent 2%～ 3%, dispersant 3% to 4%, leveling agent 5% to 6% and defoaming agent 1% to 2%, the balance is water, of which deionized water with less impurities is preferred to avoid ions in water Type impurities affect the function of each component in water-based paint. The water-based paint provided by this embodiment can be baked at a temperature of about 80° C. for 30 minutes to form a film.

The present disclosure also provides a method for preparing the above-mentioned water-based paint, which method comprises mixing a water-based silicone-modified acrylic resin and a resin selected from the following (a) or (b): (a) water-based amino resin; (b) water-based Amino resin and water-based polyurethane resin; and optional additives, mix uniformly according to the formula. The preparation method is simple to operate, does not require specific equipment, and is widely used.

In some optional embodiments, the components of the aqueous coating are stirred and mixed under the condition of rotating speed of 1500rpm to 2500rpm. The rotating speed of stirring and mixing can be, for example, but not limited to 1500rpm, 1600rpm, 1700rpm, 1800rpm, 1900rpm, 2000rpm, 2100rpm, 2200rpm, 2300rpm, 2400rpm or 2500rpm, the rotation speed of stirring and mixing is preferably 1800rpm-2200rpm, more preferably 2000rpm. By optimizing the speed of stirring the water-based paint, the components can be more uniformly dispersed, and the quality of the prepared water-based paint is better.

The present disclosure also provides the application of a water-based paint using a combination of water-based silicone modified acrylic resin and water-based amino resin as a film-forming substance in the preparation of anti-theft doors. Good performance, strong adhesion, high hardness, not easy to fall off, prolong the use time of the anti-theft door. The present disclosure also provides the application of water-based paints using water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin as film-forming substances in the preparation of heating devices, and the water-based paint is coated on the surface of the heating device to form a coating The membrane can withstand a temperature of 100°C for a long time, and does not fall off when exposed to water, which significantly prolongs the use time of the heating device. Furthermore, as green environmental protection becomes more and more popular, the radiator and anti-theft door industries are all in a state of suspension, the above-mentioned water-based paint can restore the normal production order of enterprises and promote economic development.

The technical solutions and beneficial effects of the present disclosure will be further described below in conjunction with preferred embodiments.

Example 1

This embodiment provides a water-based paint. The water-based paint includes the following components in terms of mass percentage: 55% of water-based silicone modified acrylic resin, 9% of water-based amino resin, 1% of anti-flash rust agent, water-based organic color 15% pulp, 3% dispersant, 4% leveling agent and 1% defoamer, the balance is deionized water;

Among them, the water-based silicone modified acrylic resin is JELEEAC-749RG, the water-based amino resin is the water-based amino resin 903, the water-based organic colorant is Orvat CSE101W, the anti-flash rust agent is Halox SZP-391, and the dispersant is San Nopco SN-5040, leveling agent is BYK-346; defoaming agent is Foamex 1488. The components are mixed according to the formula amount and then stirred and mixed uniformly under the condition of 2000 rpm to obtain the water-based paint.

Example 2

This embodiment provides a water-based paint. The difference from Example 1 is that the components are mixed according to the formula amount and then stirred and mixed uniformly under the condition of 2500 rpm to obtain the water-based paint.

Example 3

This embodiment provides a water-based paint. The difference from Example 1 is that the components are mixed according to the formula amount and then stirred and mixed uniformly under the condition of 1500 rpm to obtain the water-based paint.

Example 4

This example provides a water-based paint. The difference from Example 1 is that the water-based silicone modified acrylic resin is JELEEAC-749RG, the water-based amino resin is CYMEL 385, and the water-based organic colorant is Alvato CSE101W, which is anti-flash rust. The agent is Raybo 60, the dispersant is San Nopco SN-5040, the flat agent is BYK-346, and the defoamer is BYK-205.

Example 5

This example provides a water-based paint. The difference from Example 1 is that the water-based silicone-modified acrylic resin is silicone-modified acrylic emulsion EA2031S, the water-based amino resin is CYMEL 385, and the water-based organic colorant is Orvat CSE101W. , The anti-flash rust agent is Raybo 60, the dispersant is San Nopco SN-DISPERSANT 5029, the leveling agent is BYK-346, and the defoaming agent is BYK-205.

Example 6

This embodiment provides a water-based paint. The difference from Example 1 is that, by mass percentage, the water-based paint includes the following components: 52% of water-based silicone modified acrylic resin, 10% of water-based amino resin, anti-flash Rust agent 1%, water-based organic color paste 16.5%, dispersant 2%, leveling agent 6% and defoamer 1%, the balance is deionized water.

Example 7

This embodiment provides a water-based paint. The difference from Example 1 is that, by mass percentage, the water-based paint includes the following components: 60% water-based silicone modified acrylic resin, 6% water-based amino resin, anti-flash Rust agent 5%, water-based organic color paste 12%, dispersant 4%, leveling agent 1.5% and defoamer 2.5%, the balance is deionized water.

Example 8

This embodiment provides a water-based paint. The difference from Embodiment 1 is that, in terms of mass percentage, the water-based paint includes the following components: 45% water-based silicone modified acrylic resin, 15% water-based amino resin, and water-based organic resin. Color paste 10%, dispersant 3%, leveling agent 5% and defoamer 1%, the balance is deionized water.

Example 9

This embodiment provides a water-based paint. The water-based paint includes the following components by mass percentage: the water-based paint includes the following components: 45% water-based silicone modified acrylic resin, 7% water-based amino resin, water-based Polyurethane resin 10%, anti-flash rust agent 3%, water-based organic color paste 15%, dispersant 3%, leveling agent 4% and defoamer 1%, the balance is deionized water;

Among them, the water-based silicone modified acrylic resin is JELEEAC-749RG, the water-based amino resin is the water-based amino resin 903; the water-based polyurethane resin is JELEE WPU-066: the water-based organic colorant is Orvat CSE101W, and the anti-flash rust agent is Halox SZP- 391, the dispersant is San Nopco SN-5040, the leveling agent is BYK-346; the defoamer is Foamex 1488. The components are mixed according to the formula amount and then stirred and mixed uniformly under the condition of 2000 rpm to obtain a water-based paint.

Example 10

The water-based silicone modified acrylic resin is silicone-modified acrylic polymer emulsion WC-SA109, the water-based amino resin is water-based amino resin 903; the water-based polyurethane resin is JELEE WPU-066: the water-based organic colorant is Orvat CSE101W, anti-flash The rust agent is Raybo 60, the dispersant is San Nopco SN-DISPERSANT 5029, the leveling agent is BYK-346, and the defoaming agent is BYK-205. The components are mixed according to the formula amount and then stirred and mixed uniformly under the condition of 2000 rpm to obtain the water-based paint.

Comparative example 1

This comparative example provides a water-based paint. The difference from Example 1 is that it does not contain water-based amino resin and the amount of water-based silicone modified acrylic resin is 64%.

Comparative example 2

This comparative example provides a water-based paint. The difference from Example 1 is that the water-based silicone modified acrylic resin VN937 is used instead of the water-based silicone modified acrylic resin.

Comparative example 3

This comparative example provides a water-based paint. The difference from Example 1 is that the water-based epoxy resin CYDW-100 is used instead of the water-based silicone modified acrylic resin.

Effect example

After spraying the water-based paints provided in Example 1 to Example 13, and Comparative Example 1 to Comparative Example 3 on the substrate, the performance of the coating film was tested.

Table 1 Coating performance test results

It can be seen from the foregoing examples and comparative examples that the water-based coatings provided by the present disclosure have good performance. From the comparison of Example 1, Example 9 and Comparative Examples 1-3, it can be seen that the present disclosure uses water-based silicone modified Acrylic resin and water-based amino resin are used as film-forming materials, or water-based silicone modified acrylic resin, water-based amino resin and water-based polyurethane resin are used as film-forming materials, which is better than using other components as film-forming materials; from Example 1 and implementation It can be seen from the comparison between Examples 6-8 that optimizing the ratio of each component can optimize the performance of the water-based coating; from the comparison between Examples 1-3, it can be seen that optimizing the stirring speed of the water-based coating also Able to optimize the performance of water-based coatings.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present disclosure. range.

Claims

A water-based paint, characterized in that the water-based paint includes a film-forming material and optional auxiliary agents; the film-forming material of the water-based paint includes the following components: water-based silicone modified acrylic resin, and selected from the following ( The resin shown in a) or (b):

(a) Water-based amino resin;

(b) Water-based amino resin and water-based polyurethane resin.
The water-based paint according to claim 1, wherein the film-forming substance of the water-based paint comprises water-based organosilicon modified acrylic resin and water-based amino resin;

Taking the total mass percentage of each component of the water-based coating as 100%, the amount of water-based silicone modified acrylic resin is 50% to 60%, and the amount of water-based amino resin is 6% to 12%;

Preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 52% to 60%, and the amount of water-based amino resin is 7% to 10%;

More preferably, the total mass percentage of the components of the water-based coating is 100%, the amount of the water-based silicone modified acrylic resin is 55% to 60%, and the amount of the water-based amino resin is 8% to 9%;

Preferably, the auxiliary agent includes an anti-flash rust agent;

Preferably, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the anti-flash rust agent is 0.5% to 5%, preferably 1% to 3%, more preferably 1% to 2% .
The water-based paint according to claim 1, wherein the film-forming substance of the water-based paint comprises water-based organosilicon modified acrylic resin, water-based amino resin and water-based polyurethane resin;

Preferably, the water-based polyurethane resin includes aliphatic polyester polyurethane;

Preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 40%-50%, the amount of water-based amino resin is 5%-8%, and the amount of water-based polyurethane resin The dosage is 8%～12.5%;

Preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 42%-50%, the amount of water-based amino resin is 5.5%-8%, and the amount of water-based polyurethane resin The dosage is 9%～12%;

More preferably, the total mass percentage of each component of the water-based coating is 100%, the amount of water-based silicone modified acrylic resin is 45% to 50%, and the amount of water-based amino resin is 6% to 7%. The amount of resin is 10%-11%;

Preferably, the auxiliary agent includes an anti-flash rust agent;

Preferably, the sum of the mass percentages of the components of the water-based paint is 100%, and the amount of the anti-flash rust agent is 1% to 5%, preferably 1.5% to 4%, more preferably 2% to 3% .
The water-based paint according to claim 1, wherein the water-based paint further comprises a pigment; preferably, the pigment comprises an organic pigment;

Preferably, the organic pigment includes an aqueous organic color paste;

Preferably, the sum of the mass percentages of the components of the water-based paint is 100%, and the amount of the water-based organic colorant is 12%-18%, preferably 13%-16.5%, more preferably 14%-15% .
The water-based paint according to claims 1-4, wherein the auxiliary agent includes at least one of a dispersant, a leveling agent and a defoaming agent;

Preferably, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the dispersant is 1% to 4%, preferably 1.5% to 3.5%, more preferably 2% to 3%;

Preferably, the total mass percentage of the components of the water-based coating is 100%, and the amount of the leveling agent is 1% to 6%, preferably 1.5% to 5.5%, more preferably 2% to 5%;

Preferably, the sum of the mass percentages of the components of the water-based coating is 100%, and the amount of the defoamer is 0.5% to 2.5%, preferably 1% to 2.5%, more preferably 1% to 2%.
The water-based paint according to any one of claims 1 to 4, characterized in that, by mass percentage, the water-based paint comprises the following components: water-based silicone modified acrylic resin 55% to 60%, water-based amino resin 8 %-9%, water-based organic color paste 14%-15%, anti-flash rust agent 1%-2%, dispersant 2%-3%, leveling agent 2%-5% and defoamer 1-2%, The balance is water; preferably, the water includes deionized water.
The water-based paint according to any one of claims 1 to 4, wherein the water-based paint comprises the following components by mass percentage: 45%-50% of water-based silicone modified acrylic resin, water-based amino resin 6 %～7%, water-based polyurethane resin 10%～11%, water-based organic color paste 14%～15%, anti-flash rust agent 2%～3%, dispersant 2%～3%, leveling agent 2%～5% And defoaming agent 1% to 2%, and the balance is water; preferably, the water includes deionized water.
The preparation method of water-based paint according to any one of claims 1-7, characterized in that, the preparation method comprises: mixing water-based silicone modified acrylic resin and a resin selected from the following (a) or (b) :

(a) Water-based amino resin;

(b) Water-based amino resin and water-based polyurethane resin;

And, optional additives, mix uniformly according to the formula amount;

Preferably, the uniform mixing includes stirring and mixing at a rotation speed of 1500 rpm to 2500 rpm; the rotation speed is preferably 1800 rpm to 2200 rpm; more preferably 2000 rpm.
The use of the water-based paint of claim 1, 2, 4, 5 or 6 in the preparation of anti-theft doors.
The use of the water-based paint of claim 1, 3, 4, 5 or 7 in the preparation of heating devices.