CN115141517A - Nano dry powder coating and construction method thereof - Google Patents
Nano dry powder coating and construction method thereof Download PDFInfo
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- CN115141517A CN115141517A CN202210929247.6A CN202210929247A CN115141517A CN 115141517 A CN115141517 A CN 115141517A CN 202210929247 A CN202210929247 A CN 202210929247A CN 115141517 A CN115141517 A CN 115141517A
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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
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0853—Vinylacetate
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/68—Particle size between 100-1000 nm
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention relates to a nano dry powder coating and a construction method thereof, wherein the coating comprises the following raw materials in parts by weight: 30-50 parts of redispersible ethylene-vinyl acetate copolymer binary copolymer latex powder; 10-20 parts of nano titanium dioxide; 10-20 parts by weight of calcium carbonate; calcining 5-10 parts of shell powder; 5-10 parts of talcum powder; 1-2 parts of sodium alginate; 0.5-1 part by weight of sodium carboxymethylcellulose. The sodium alginate and the sodium carboxymethyl cellulose are creatively added into the nano dry powder coating according to a proper proportion, so that the nano dry powder coating has good water storage resistance, alkali resistance, scrubbing resistance, ultraviolet resistance and temperature change resistance.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a nano dry powder coating and an application method thereof.
Background
Latex paints (architectural coatings) in general use today are composed of four components: (1) film-forming substances-polymer emulsions, such as aqueous polyacrylates, etc.; (2) pigment and filler-titanium white powder, calcium carbonate powder, pigment, etc.; (3) water; (4) assistant-film forming assistant, defoaming agent, thickening agent, leveling agent, antiseptic, antifreezing agent, etc. about 10 kinds of chemical substances. Of the four components, film forming materials and pigments and fillers are generally called as solid parts and are indispensable for forming the coating. Water is required for the production and construction (use) of the coating, and accounts for about 50 percent of the total weight of the architectural coating. After the paint is applied to the wall, water is volatilized into the air, so that the effect of the paint is completed, and only the solid parts (film-forming materials and pigments and fillers) of the paint are left. The auxiliary agent is necessary for producing, storing and constructing (using) the building coating (emulsion paint), and after the coating is constructed on a wall, part of the auxiliary agent is remained in the coating and is a solid substance. Part of the auxiliary agent is volatilized into the air and is the main source of VOC in the latex paint. The VOC in these coatings not only pollutes the environment and endangers the health of people, but also causes huge waste of limited resources. Therefore, how to thoroughly solve the problem of VOC in architectural coatings has become a great common and key technical problem facing the scientific and technical fields of coatings at home and abroad.
In order to solve the above problem, it is believed that if the film-forming material (polymer emulsion) of the existing latex paint is dried into powder and then mixed with pigments and fillers, and the mixture is dissolved in water and then has the same performance as the existing latex paint, the problem of VOC is completely solved, and various additives in the paint can be omitted, thereby saving resources and cost. Therefore, dry powder coatings are produced. Research into powder coatings began approximately in the last 60 centuries.
In comparison, the dry powder coating is a coating type with simple preparation process, low storage and transportation cost, convenient use and excellent comprehensive performance, is widely applied to the field of buildings, and particularly has a considerable market share when being used as an inner and outer wall coating. At present, calcium carbonate, kaolin and the like are basically used as fillers in dry powder coatings, and the filler particles have poor dispersibility and are easy to agglomerate, and generally have the problems of poor compatibility of the fillers and polymer latex, large water consumption for redispersion, low redispersion self-crosslinking activity and the like, so that the obtained coating has poor weather resistance and serious aging and shedding phenomena.
In order to solve the technical problems, the chinese granted patent CN107760122B discloses a dry powder coating for exterior walls and a preparation method thereof, which comprises the following steps: the dry powder coating comprises, by weight, 10-30 parts of redispersible latex powder, 5-15 parts of modified lignin, 25-45 parts of modified shell powder, 10-20 parts of titanium dioxide, 0.2-0.6 part of thickening agent, 0.3-0.8 part of powdery dispersant and 0.2-0.6 part of powdery defoaming agent, wherein the dry powder coating contains the modified lignin and the modified shell powder, and is matched with other auxiliary materials.
In addition, the Chinese granted patent CN 10169639B also discloses a dry powder coating for construction and a preparation method and a using method thereof, which is prepared from polymer latex powder, titanium dioxide, calcium carbonate, calcined kaolin, talcum powder, cellulose ether, a solid defoamer, a solid dispersant, a solid thixotropic agent and a coloring pigment, and the preparation method comprises the steps of putting all the components of the dry powder coating into a dry powder mixer to be mixed for 20-40 min, and then removing larger particles by a 120-mesh vibrating screen. The application method of the dry powder coating comprises the following steps: pretreating the surface of a wall; pouring the dry powder coating into clear water, stirring until the dry powder coating is uniformly mixed, standing, and stirring again; the obtained liquid coating is constructed by adopting a rolling coating, spraying or brushing way; the formed coating has the characteristics of good water resistance, alkali resistance, weather resistance, scrubbing resistance, dirt resistance and the like, has the performance equivalent to that of the traditional latex paint, and does not contain VOC (zero VOC), heavy metal and other components harmful to the environment and human health.
For another example, chinese granted patent CN112625472B discloses a two-component reactive film-forming inorganic dry powder coating and its using method, the inorganic dry powder coating is composed of a component a and a component B; the component A comprises the following components in percentage by mass of the total mass of the component A: 16-77% of inorganic film-forming material, 20-70% of inorganic filler and 0-20% of auxiliary material; the component B comprises the following components in percentage by mass of the total mass of the component B: 55-90% of silicon-aluminum raw material, 5-40% of alkali activator and the balance of Si/Al regulator. In the inorganic dry powder coating provided by the invention, the component A is a C-S-H gelling system, the component B is a geopolymer gelling system, and the components A and B have complementary performances, so that the comprehensive strength of the coating can be greatly improved; and the coating realizes instant material mixing and spraying processes through a mixed spraying device of the two-component coating, is simple and convenient to use, efficient and environment-friendly, and realizes controllability of construction time.
Although there are existing dry powder coatings, how to further improve the strength of the dry powder coating, such as a dry powder coating with good water resistance, alkali resistance, scrub resistance, ultraviolet resistance and temperature change resistance, is still a technical problem to be solved by those skilled in the art.
Disclosure of Invention
Based on the background technology, the technical problem to be solved by the invention is to provide a dry powder coating with good water resistance, alkali resistance, scrub resistance, ultraviolet ray resistance and temperature change resistance. In order to realize the purpose of the invention, the following technical scheme is adopted:
the invention relates to a nano dry powder coating, which comprises the following raw materials in parts by weight:
30-50 parts of redispersible ethylene-vinyl acetate copolymer binary copolymer latex powder;
10-20 parts of nano titanium dioxide;
10-20 parts by weight of calcium carbonate;
calcining 5-10 parts of shell powder;
5-10 parts of talcum powder;
1-2 parts of sodium alginate;
0.5-1 part by weight of sodium carboxymethylcellulose.
In a preferred embodiment of the present invention, the coating comprises the following raw materials in parts by weight:
30-40 parts of redispersible ethylene-vinyl acetate copolymer binary copolymer latex powder;
10-15 parts of nano titanium dioxide;
10-15 parts of calcium carbonate;
calcining 5-8 parts of shell powder;
5-8 parts of talcum powder;
1-1.5 parts of sodium alginate;
0.5-0.7 part by weight of sodium carboxymethyl cellulose.
In a preferred embodiment of the present invention, the nano titanium dioxide has an average particle diameter of 50 to 150nm; preferably 80-120nm.
In a preferred embodiment of the present invention, the nano dry powder coating comprises an inorganic pigment.
The invention also relates to a construction method of the nano dry powder coating, which comprises the following steps:
firstly, injecting clear water into a stirrer, wherein the amount of the clear water is 2-3 times of that of the dry powder coating, stirring for 10-20 minutes, standing for 10-20 minutes, and stirring for 2-5 minutes; the water-blended dry powder coating is coated on the wall surface which is primed and leveled by putty in a roller coating mode; after the first construction, drying is carried out for 1-3 hours, and then roller coating is carried out for the second time.
Advantageous effects
The sodium alginate and the sodium carboxymethyl cellulose are creatively added into the nano dry powder coating according to a proper proportion, so that the nano dry powder coating has good water storage resistance, alkali resistance, scrubbing resistance, ultraviolet resistance and temperature change resistance.
Detailed Description
In order to further understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
Unless otherwise specified, the reagents involved in the examples of the present invention are all commercially available products, and all of them are commercially available.
Example 1:
a nano dry powder coating comprises the following components in parts by weight:
30 kg of redispersible ethylene-vinyl acetate copolymer (EVA) binary copolymer latex powder, 10 kg of nano titanium dioxide with the average particle size of 100nm, 10 kg of calcium carbonate, 5 kg of calcined shell powder, 5 kg of talcum powder, 1 kg of sodium alginate and 0.5 kg of sodium carboxymethylcellulose. And during mixing, firstly, injecting clear water into a stirrer, wherein the amount of the clear water is 2.5 times of that of the dry powder coating, stirring for 15 minutes, standing for 12 minutes, and stirring for 3 minutes. The water-blended dry powder coating is coated on the wall surface which is primed and leveled by putty in a roller coating mode. After the first construction, the coating was dried for 2 hours and then roll-coated for the second time to give a coating film having a thickness of 3mm.
Example 2:
the same as in example 1, except that sodium alginate was used in an amount of 2 kg and sodium carboxymethylcellulose was used in an amount of 1 kg.
Example 3:
the difference from example 1 is that the average particle size of the nano titanium dioxide is 55nm.
Comparative example 1:
the same as in example 1, except that the same weight of polylactic acid was used instead of sodium alginate.
Comparative example 2:
the same as in example 1, except that the same weight of lignocellulose was used instead of sodium carboxymethylcellulose.
Comparative example 3:
the same as in example 1 except that nano zinc oxide having an average particle diameter of 65nm was used in place of nano titanium dioxide.
Description of the test
The coating films (3 mm in thickness) obtained from the dry powder coatings prepared in examples 1 to 3 and comparative examples 1 to 3 were tested according to JG/T26-2002 "inorganic building coating for exterior wall":
the ultraviolet resistance of the paint film is tested by adopting an accelerated aging instrument, the ultraviolet light source is a lamp tube with the specification of UVA-340nm, and the irradiation intensity is 1.0W/m 2 The time was recorded when the coating film (thickness 1 mm) formed by the paint started to develop chalking, blistering and/or cracking.
TABLE 1 nanometer Dry powder coating Performance test results
The experimental results show that the dry coating has good water resistance, alkali resistance, scrubbing resistance, ultraviolet resistance and temperature change resistance. In particular, example 1 is most excellent in water resistance, alkali resistance, scrub resistance, ultraviolet resistance and temperature change resistance.
The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Those skilled in the art may make modifications and variations to the embodiments disclosed herein without departing from the scope and spirit of the invention.
Claims (6)
1. A nano dry powder coating comprises the following raw materials in parts by weight:
30-50 parts of redispersible ethylene-vinyl acetate copolymer binary copolymer latex powder;
10-20 parts of nano titanium dioxide;
10-20 parts by weight of calcium carbonate;
calcining 5-10 parts of shell powder;
5-10 parts of talcum powder;
1-2 parts of sodium alginate;
0.5-1 part by weight of sodium carboxymethylcellulose.
2. A nano dry powder coating comprises the following raw materials in parts by weight:
30-40 parts of redispersible ethylene-vinyl acetate copolymer bipolymer latex powder;
10-15 parts of nano titanium dioxide;
10-15 parts of calcium carbonate;
calcining 5-8 parts of shell powder;
5-8 parts of talcum powder;
1-1.5 parts of sodium alginate;
0.5 to 0.7 weight portion of sodium carboxymethyl cellulose.
3. The nano dry powder coating of claim 1 or 2, the nano titanium dioxide having an average particle size of 50 to 150nm.
4. The nano dry powder coating of claim 1 or 2, the nano titanium dioxide having an average particle size of 80 to 120nm.
5. The nano dry powder coating of claim 1 or 2, comprising an inorganic pigment.
6. The method of constructing a nano dry powder coating according to any one of claims 1 to 5, comprising the steps of:
firstly, injecting clear water into a stirrer, wherein the amount of the clear water is 2-3 times of that of the dry powder coating, stirring for 10-20 minutes, standing for 10-20 minutes, and stirring for 2-5 minutes; the water-blended dry powder coating is coated on the wall surface which is primed and leveled by putty in a roller coating mode; after the first construction, the construction is dried for 1-3 hours and then is coated by a roller for the second time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210929247.6A CN115141517A (en) | 2022-08-03 | 2022-08-03 | Nano dry powder coating and construction method thereof |
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| CN202210929247.6A CN115141517A (en) | 2022-08-03 | 2022-08-03 | Nano dry powder coating and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116041997A (en) * | 2022-12-24 | 2023-05-02 | 上海墙特节能材料有限公司 | Inorganic dry powder coating and preparation method thereof |
| CN116082893A (en) * | 2022-12-29 | 2023-05-09 | 广东涂百年新型材料有限公司 | Antibacterial dry powder coating and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116041997A (en) * | 2022-12-24 | 2023-05-02 | 上海墙特节能材料有限公司 | Inorganic dry powder coating and preparation method thereof |
| CN116041997B (en) * | 2022-12-24 | 2024-01-09 | 上海墙特节能材料有限公司 | Inorganic dry powder coating and preparation method thereof |
| CN116082893A (en) * | 2022-12-29 | 2023-05-09 | 广东涂百年新型材料有限公司 | Antibacterial dry powder coating and construction method thereof |
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