CN113683932A - Stain-resistant exterior wall latex paint and preparation method thereof - Google Patents

Stain-resistant exterior wall latex paint and preparation method thereof Download PDF

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Publication number
CN113683932A
CN113683932A CN202110821205.6A CN202110821205A CN113683932A CN 113683932 A CN113683932 A CN 113683932A CN 202110821205 A CN202110821205 A CN 202110821205A CN 113683932 A CN113683932 A CN 113683932A
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Prior art keywords
parts
exterior wall
stain
latex paint
emulsifier
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CN202110821205.6A
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Chinese (zh)
Inventor
乔启信
朱华林
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Anhui Lencaqi Waterproof Technology Co ltd
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Anhui Lencaqi Waterproof Technology Co ltd
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Priority to CN202110821205.6A priority Critical patent/CN113683932A/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/062—Copolymers with monomers not covered by C09D133/06
    • C09D133/068—Copolymers with monomers not covered by C09D133/06 containing glycidyl groups
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/024—Emulsion paints including aerosols characterised by the additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/024—Emulsion paints including aerosols characterised by the additives
    • C09D5/027—Dispersing agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/024—Emulsion paints including aerosols characterised by the additives
    • C09D5/028—Pigments; Filters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate

Abstract

The invention relates to the technical field of building exterior wall decoration materials, in particular to stain-resistant exterior wall latex paint which comprises, by weight, 15-25 parts of acrylic monomer copolymer, 1-3 parts of emulsifier, 0.5-1 part of ammonium persulfate, 40-50 parts of filler, 2-8 parts of modified dispersant, 1-2 parts of film-forming assistant, 0.5-1.5 parts of thickener, 0.8-1.5 parts of defoamer, 0.5-2 parts of modified siloxane and 30-50 parts of water; wherein the modified dispersant is polycarboxylic acid ammonium salt; the invention also provides a preparation method of the stain-resistant exterior wall latex paint. According to the invention, the acrylic monomer copolymer, the emulsifier and the ammonium persulfate are used as raw materials to form a dense net structure with high crosslinking degree, strong rigidity and strong tensile property, so that the stain resistance of the emulsion paint is improved; the medium PVC coating is prepared, so that the anti-contamination performance of the coating is enhanced; the added modified dispersant and hydrophobic modified siloxane additive further enhance the stain resistance of the exterior wall latex paint.

Description

Stain-resistant exterior wall latex paint and preparation method thereof
Technical Field
The invention relates to the technical field of building exterior wall decoration materials, in particular to stain-resistant exterior wall latex paint and a preparation method thereof.
Background
The building paint is used as the main material of the facing and plays a role in protecting and decorating buildings. The exterior wall paint facing of building features low cost, easy construction, rich colors of building, and wide application in building decoration.
However, after the exterior wall latex paint is painted on a building, the exterior wall latex paint is exposed to the natural atmospheric environment for a long time and is easily deposited and adhered by various pollutants in the air, especially in rainy season, if the exterior wall latex paint has poor waterproof and stain-resistant performance, some pollutants can enter a paint film along the pore space of the filler, and stains are left in the paint film after rainwater is evaporated, so that the decorative effect of the paint film is influenced, the paint film is not beneficial to cleaning, and even bubbling, falling and the like can be generated. Therefore, the quality of the stain resistance of the exterior wall coating is one of the important indicators for evaluating the decoration durability.
At present, a hydrophilic surfactant is often adopted when the emulsion paint is prepared, but the surfactant can remain in a paint film, so that the water resistance of the dry film is reduced, and the stain resistance of the paint film is reduced; for medium and high PVC coating, the higher proportion of pigment and filler contributes to improving the rigidity of a coating film, but has stronger water absorption, and most of the adsorbed pigment and filler is hydrophilic anionic dispersant which is very easy to be wetted by water for the second time during the dispersion surface treatment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the stain-resistant exterior wall latex paint which has good stain resistance, is hydrophobic and is easy to prepare. In order to realize the purpose of the invention, the following technical scheme is adopted:
a stain-resistant external wall latex paint comprises, by weight, 15-25 parts of acrylic monomer copolymer, 1-3 parts of emulsifier, 0.5-1 part of ammonium persulfate, 40-50 parts of filler, 2-8 parts of modified dispersant, 1-2 parts of film-forming assistant, 0.5-1.5 parts of thickener, 0.8-1.5 parts of defoamer, 0.5-2 parts of modified siloxane and 30-50 parts of water; wherein the modified dispersant is polycarboxylic acid ammonium salt.
Preferably, the acrylic monomer copolymer is composed of glycidyl methacrylate, acrylic acid, styrene, and butyl acrylate.
Preferably, the weight ratio of the glycidyl methacrylate to the acrylic acid to the styrene to the butyl acrylate is 1: (3-5): (70-80): (240-250).
Preferably, the emulsifier is one of a reactive emulsifier COPS-1 or a phosphate emulsifier PP40, the film-forming aid is TEXANOL, the thickener is one of an associative thickener or an alkali swelling thickener, and the defoamer is any one of organosilicon, mineral oil or polyether modified defoamers.
Preferably, the filler is one of bentonite, ground calcium carbonate or talcum powder.
In order to achieve the aim, the invention also provides a preparation method of the stain-resistant exterior wall latex paint, which comprises the following steps:
(1) preparing high polymer emulsion: taking an acrylic monomer copolymer, an emulsifier, ammonium persulfate and water as raw materials to prepare a high polymer emulsion for later use;
(2) high-speed stirring: according to the formula, a certain amount of the high polymer emulsion and the modified dispersant prepared by the steps are weighed in a stirring container at a rotating speed R1Stirring uniformly, adding a certain mass of filler and a defoaming agent, and stirring uniformly to obtain a uniform dispersion liquid;
(3) low-speed film forming: regulating the rotational speed to R2And adding a film-forming assistant, a thickening agent, modified siloxane and a proper amount of water into the dispersion according to the formula, and uniformly stirring to prepare the stain-resistant exterior wall latex paint.
Preferably, the preparation of the high polymer emulsion in the step (1) specifically comprises the following steps:
1) under the protection of nitrogen, taking a proper amount of acrylic monomer copolymer and water into a four-neck flask, and regulating the rotating speed to be R3Heating to 80-85 ℃, adding part of emulsifier and ammonium persulfate, and reacting for 0.5-1 h;
2) dropwise adding the rest of emulsifier and ammonium persulfate into the solution, heating to 85-90 ℃ after dropwise adding, and keeping the temperature for 1-1.5 h;
3) and (3) after the solution is subjected to heat preservation reaction, cooling to 30-45 ℃, adjusting the pH to 7-9, filtering and discharging to obtain the high polymer emulsion.
Preferably, the time for dropwise adding the rest of the emulsifier and the ammonium persulfate in the step 2) is 1-2 h.
Preferably, said R is1Is 600-800R/min, the R is2Is 200-300R/min, the R3Is 400-600 r/min.
Compared with the prior art, the invention has the beneficial effects that: the stain-resistant exterior wall latex paint disclosed by the invention takes an acrylic monomer copolymer, an emulsifier and ammonium persulfate as raw materials, and a dense network structure with high crosslinking degree, strong rigidity and strong tensile property is formed, so that the stain resistance of the latex paint is improved; the medium PVC coating prepared by the method not only improves the anti-contamination performance of the coating, but also does not influence the recoatability and the anti-back viscosity of the coating; the modified dispersant is added, so that more filler in the formula adsorbs the hydrophobically modified dispersant, which is equivalent to hydrophobic surface treatment on the filler, and the stain resistance of the exterior wall latex paint is further improved; the hydrophobic modified siloxane additive can gradually migrate to the surface of the coating in the drying process of the coating, a hydrophobic film is formed after complete drying, and the coating is difficult to adsorb dust due to the lower surface tension of the hydrophobic film, so that the stain resistance of the exterior wall latex paint is greatly improved.
Drawings
FIG. 1 is a flow chart of a method for preparing a stain resistant exterior wall latex paint of the present invention;
FIG. 2 is a flow chart of the present invention for preparing a high polymer emulsion;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Detailed description of the preferred embodiment 1
In the embodiment, the specific formula comprises the following components in parts by weight:
acrylic monomer copolymer 15 portions of
Emulsifier 1 part of
Ammonium persulfate 0.5 portion
Filler material 40 portions of
Modified dispersing agent 2 portions of
Film forming aid 1 part of
Thickening agent 0.5 portion
Defoaming agent 0.8 portion of
Modified siloxanes 0.5 portion
Water (W) 30 portions of
Wherein the modified dispersant is polycarboxylic acid ammonium salt; the emulsifier is a reactive emulsifier COPS-1; the film-forming assistant is TEXANOL; the thickener is an associated thickener; the defoaming agent is an organic silicon modified defoaming agent; the filler is bentonite.
The acrylic monomer copolymer is composed of glycidyl methacrylate, acrylic acid, styrene and butyl acrylate, and the weight ratio of the glycidyl methacrylate to the acrylic acid to the styrene to the butyl acrylate is 1: 3: 70: 240.
FIG. 1 is a flow chart of a preparation method of the stain-resistant exterior wall latex paint, and it can be seen that the specific preparation method of the embodiment is as follows:
step S1: preparing high polymer emulsion: taking acrylic monomer copolymer, emulsifier, ammonium persulfate and water as raw materials to prepare high polymer emulsion for later use. In this step, the method specifically comprises the following steps: firstly, under the protection of nitrogen, taking a proper amount of acrylic monomer copolymer and water into a four-neck flask, adjusting the rotating speed to 400r/min, heating to 80 ℃, adding part of emulsifier and ammonium persulfate, and reacting for 0.5 h; then, dropwise adding the rest of emulsifier and ammonium persulfate into the solution within 1h, heating to 85 ℃ after dropwise adding, and keeping the temperature for 1 h; and then, after the solution is subjected to heat preservation reaction, cooling to 30 ℃, adjusting the pH to 7, and finally, filtering and discharging to obtain the high polymer emulsion.
Step S2: high-speed stirring: weighing a certain amount of the polymer emulsion and the modified dispersing agent prepared in the steps into a stirring container according to the formula, uniformly stirring at the rotating speed of 600r/min, adding a certain amount of filler and defoaming agent, and uniformly stirring to obtain uniform dispersion liquid.
Step S3: low-speed film forming: regulating the rotating speed to 200r/min, adding a film-forming aid, a thickening agent, modified siloxane and a proper amount of water into the dispersion according to the formula, uniformly stirring to prepare the stain-resistant exterior wall latex paint, and detecting the correlation performance.
Specific example 2
In the embodiment, the specific formula comprises the following components in parts by weight:
acrylic monomer copolymer 25 portions of
Emulsifier 3 portions of
Ammonium persulfate 1 part of
Filler material 50 portions of
Modified dispersing agent 8 portions of
Film forming aid 2 portions of
Thickening agent 1.5 parts of
Defoaming agent 1.5 parts of
Modified siloxanes 2 portions of
Water (W) 50 portions of
Wherein the modified dispersant is polycarboxylic acid ammonium salt; the emulsifier is phosphate ester emulsifier PP 40; the film-forming assistant is TEXANOL; the thickening agent is an alkali swelling thickening agent; the defoaming agent is mineral oil modified defoaming agent; the filler is heavy calcium carbonate.
The acrylic monomer copolymer is composed of glycidyl methacrylate, acrylic acid, styrene and butyl acrylate, and the weight ratio of the glycidyl methacrylate to the acrylic acid to the styrene to the butyl acrylate is 1: 5: 80: 250.
FIG. 1 is a flow chart of a preparation method of the stain-resistant exterior wall latex paint, and it can be seen that the specific preparation method of the embodiment is as follows:
step S1: preparing high polymer emulsion: taking acrylic monomer copolymer, emulsifier, ammonium persulfate and water as raw materials to prepare high polymer emulsion for later use. In this step, the method specifically comprises the following steps: firstly, under the protection of nitrogen, taking a proper amount of acrylic monomer copolymer and water into a four-neck flask, adjusting the rotating speed to 600r/min, heating to 85 ℃, adding part of emulsifier and ammonium persulfate, and reacting for 1 h; then, dropwise adding the rest of emulsifier and ammonium persulfate into the solution within 2h, heating to 90 ℃ after dropwise adding, and keeping the temperature for 1.5 h; and then, after the solution is subjected to heat preservation reaction, cooling to 45 ℃, adjusting the pH to 9, and finally, filtering and discharging to obtain the high polymer emulsion.
Step S2: high-speed stirring: weighing a certain amount of the polymer emulsion and the modified dispersing agent prepared in the steps into a stirring container according to the formula, uniformly stirring at the rotating speed of 800r/min, adding a certain amount of filler and defoaming agent, and uniformly stirring to obtain uniform dispersion liquid.
Step S3: low-speed film forming: regulating the rotating speed to 300r/min, adding a film-forming aid, a thickening agent, modified siloxane and a proper amount of water into the dispersion according to the formula, uniformly stirring to prepare the stain-resistant exterior wall latex paint, and detecting the correlation performance.
Specific example 3
In the embodiment, the specific formula comprises the following components in parts by weight:
acrylic monomer copolymer 20 portions of
Emulsifier 2 portions of
Ammonium persulfate 0.8 portion of
Filler material 45 portions of
Modified dispersing agent 6 portions of
Film forming aid 1 part of
Thickening agent 1.2 parts of
Defoaming agent 1.2 parts of
Modified siloxanes 1 part of
Water (W) 40 portions of
Wherein the modified dispersant is polycarboxylic acid ammonium salt; the emulsifier is a reactive emulsifier COPS-1; the film-forming assistant is TEXANOL; the thickening agent is an alkali swelling thickening agent; the defoaming agent is polyether modified defoaming agent; the filler is talcum powder.
The acrylic monomer copolymer is composed of glycidyl methacrylate, acrylic acid, styrene and butyl acrylate, and the weight ratio of the glycidyl methacrylate to the acrylic acid to the styrene to the butyl acrylate is 1: 4: 75: 245.
FIG. 1 is a flow chart of a preparation method of the stain-resistant exterior wall latex paint, and it can be seen that the specific preparation method of the embodiment is as follows:
step S1: preparing high polymer emulsion: taking acrylic monomer copolymer, emulsifier, ammonium persulfate and water as raw materials to prepare high polymer emulsion for later use. In this step, the method specifically comprises the following steps: firstly, under the protection of nitrogen, taking a proper amount of acrylic monomer copolymer and water into a four-neck flask, adjusting the rotating speed to be 500r/min, heating to 82 ℃, adding part of emulsifier and ammonium persulfate, and reacting for 0.8 h; then, dropwise adding the rest of emulsifier and ammonium persulfate into the solution within 1.5h, heating to 88 ℃ after dropwise adding, and keeping the temperature for 1.2 h; and then, after the solution is subjected to heat preservation reaction, cooling to 40 ℃, adjusting the pH to 8, and finally, filtering and discharging to obtain the high polymer emulsion.
Step S2: high-speed stirring: weighing a certain amount of the polymer emulsion and the modified dispersing agent prepared in the steps into a stirring container according to the formula, uniformly stirring at the rotating speed of 700r/min, adding a certain amount of filler and defoaming agent, and uniformly stirring to obtain a uniform dispersion liquid.
Step S3: low-speed film forming: regulating the rotating speed to 200r/min, adding a film-forming aid, a thickening agent, modified siloxane and a proper amount of water into the dispersion according to the formula, uniformly stirring to prepare the stain-resistant exterior wall latex paint, and detecting the correlation performance.
The detection results are as follows:
TABLE 1 results of testing the properties of the examples
Figure BDA0003172047340000061
As can be seen from the above embodiments of the invention, the stain-resistant exterior wall latex paint of the invention takes acrylic acid monomer copolymer, emulsifier and ammonium persulfate as raw materials, and forms a dense network structure with high crosslinking degree, strong rigidity and strong tensile property, thereby improving the stain resistance of the latex paint; the medium PVC coating prepared by the method not only improves the anti-contamination performance of the coating, but also does not influence the recoatability and the anti-back viscosity of the coating; the modified dispersant is added, so that more filler in the formula adsorbs the hydrophobically modified dispersant, which is equivalent to hydrophobic surface treatment on the filler, and the stain resistance of the exterior wall latex paint is further improved; the hydrophobic modified siloxane additive can gradually migrate to the surface of the coating in the drying process of the coating, a hydrophobic film is formed after complete drying, and the coating is difficult to adsorb dust due to the lower surface tension of the hydrophobic film, so that the stain resistance of the exterior wall latex paint is greatly improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the changes or modifications within the technical scope of the present invention are included in the scope of the present invention, and therefore, the scope of the present invention should be subject to the protection scope of the claims.

Claims (9)

1. The stain-resistant exterior wall latex paint is characterized in that: according to parts by weight, the acrylic acid modified silicone modified emulsion comprises 15-25 parts of acrylic acid monomer copolymer, 1-3 parts of emulsifier, 0.5-1 part of ammonium persulfate, 40-50 parts of filler, 2-8 parts of modified dispersant, 1-2 parts of film-forming assistant, 0.5-1.5 parts of thickener, 0.8-1.5 parts of defoamer, 0.5-2 parts of modified siloxane and 30-50 parts of water; wherein the modified dispersant is polycarboxylic acid ammonium salt.
2. The stain resistant exterior wall latex paint of claim 1 wherein: the acrylic monomer copolymer is composed of glycidyl methacrylate, acrylic acid, styrene and butyl acrylate.
3. The stain resistant exterior wall latex paint according to claim 2, wherein: the weight ratio of the glycidyl methacrylate to the acrylic acid to the styrene to the butyl acrylate is 1: (3-5): (70-80): (240-250).
4. The stain resistant exterior wall latex paint of claim 1 wherein: the emulsifier is one of a reactive emulsifier COPS-1 or a phosphate emulsifier PP40, the film-forming aid is TEXANOL, the thickener is one of an associated thickener or an alkali swelling thickener, and the defoaming agent is any one of organic silicon, mineral oil or polyether modified defoaming agents.
5. The stain resistant exterior wall latex paint of claim 1 wherein: the filler is one of bentonite, heavy calcium carbonate or talcum powder.
6. A preparation method of stain-resistant exterior wall latex paint is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing high polymer emulsion: taking an acrylic monomer copolymer, an emulsifier, ammonium persulfate and water as raw materials to prepare a high polymer emulsion for later use;
(2) high-speed stirring: according to the formula, a certain amount of the high polymer emulsion and the modified dispersant prepared by the steps are weighed in a stirring container at a rotating speed R1Stirring uniformly, adding a certain mass of filler and a defoaming agent, and stirring uniformly to obtain a uniform dispersion liquid;
(3) low-speed film forming: regulating the rotational speed to R2And adding a film-forming assistant, a thickening agent, modified siloxane and a proper amount of water into the dispersion according to the formula, and uniformly stirring to prepare the stain-resistant exterior wall latex paint.
7. The method for preparing the stain-resistant exterior wall latex paint according to claim 6, wherein: the preparation of the high polymer emulsion in the step (1) specifically comprises the following steps:
1) under the protection of nitrogen, taking a proper amount of acrylic monomer copolymer and water into a four-neck flask, and regulating the rotating speed to be R3Heating to 80-85 ℃, adding part of emulsifier and ammonium persulfate, and reacting for 0.5-1 h;
2) dropwise adding the rest of emulsifier and ammonium persulfate into the solution, heating to 85-90 ℃ after dropwise adding, and keeping the temperature for 1-1.5 h;
3) and (3) after the solution is subjected to heat preservation reaction, cooling to 30-45 ℃, adjusting the pH to 7-9, filtering and discharging to obtain the high polymer emulsion.
8. The method for preparing the stain-resistant exterior wall latex paint according to claim 7, wherein: the time for dripping the rest of the emulsifier and the ammonium persulfate in the step 2) is 1-2 h.
9. The method for preparing the stain-resistant exterior wall latex paint according to claim 8, wherein: the R is1Is 600-800R/min, the R is2Is 200-300R/min, the R3Is 400-600 r/min.
CN202110821205.6A 2021-07-20 2021-07-20 Stain-resistant exterior wall latex paint and preparation method thereof Pending CN113683932A (en)

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CN115029044A (en) * 2022-06-07 2022-09-09 安徽同益净化科技有限公司 Reinforced acid and alkali resistant coating for constructional engineering and preparation method thereof
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