CN110746824A - Inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating and preparation method and application thereof - Google Patents
Inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating and preparation method and application thereof Download PDFInfo
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- CN110746824A CN110746824A CN201910875486.6A CN201910875486A CN110746824A CN 110746824 A CN110746824 A CN 110746824A CN 201910875486 A CN201910875486 A CN 201910875486A CN 110746824 A CN110746824 A CN 110746824A
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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
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
-
- 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
- C08K2201/011—Nanostructured additives
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating as well as a preparation method and application thereof. The raw materials of the coating comprise bio-based acrylic emulsion, nano silicon dioxide aqueous dispersion, film-forming additive, titanium dioxide, inorganic filler and the like. The preparation method comprises the following steps: mixing and dispersing water, an antifreezing agent, a dispersing agent, a fed pH regulator and titanium dioxide; and then adding the inorganic filler, the film-forming assistant, the bio-based acrylic emulsion, the nano-silica aqueous dispersion, the bactericide, the rheological assistant and the defoamer, and stirring to obtain the inorganic nano-silica hybrid bio-based acrylic exterior wall coating. The construction is carried out on the primer of the outer wall of the conventional building for 1-2 times. The invention forms a layer of hybridized exterior wall coating on the surface of the conventional paint film, has good strength, cracking resistance and toughness, is rich in a silicon hydroxyl group super-hydrophilic coating on the surface of the paint film, and has good stain resistance and easy cleaning performance.
Description
Technical Field
The invention relates to a nano water dispersion of organic-inorganic composite hybrid silica formed by mixing and hybridizing a nano silicon dioxide water dispersion and a bio-based acrylic emulsion. The organic-inorganic hybrid nano-silica dispersion can be used as an exterior wall coating to coat the surface of a building coating by matching with a pigment filler, so that the surface tension is improved, the water contact angle of a paint film is reduced, the stain resistance is improved, the surface hardness and the wear resistance are improved, and the invention belongs to the field of building materials.
Background
The bio-based acrylic emulsion is polymerized by adopting a fermentation product of natural biological raw materials. The natural biological raw materials are used as renewable substances to replace non-renewable petroleum product raw materials, so that the dependence on petroleum is reduced, the low-carbon emission is realized, the greenhouse effect is reduced, and the sustainable development of the coating industry is promoted. The emulsion has ultra-low VOC and ultra-low odor, and can pass the biological product certification of USDA of the United states department of agriculture.
Compared with organic paint base material, the nano silicon dioxide water dispersion liquid has less environmental pollution in the production and use processes, and the product takes water as a dispersion medium, and particularly has no adverse effects on the aspects of environment and health in the film forming process. The raw materials for producing the nano-silica aqueous dispersion are sandstone natural inorganic silicate minerals which are rich in sources and can be obtained at will, and the use of the nano-silica aqueous dispersion inorganic film forming material can reduce the dosage of bio-based acrylic emulsion in a coating formula, so that the dependence on petroleum resources is further reduced, the low-carbon emission is realized, and the greenhouse effect is reduced.
Because the bio-based acrylic emulsion product is environment-friendly and low in emission, in order to reduce the using amount of the film forming aid or not use the film forming aid in use, the hardness of the bio-based acrylic polymer is designed to be low, the strength of a coating film is poor, the surface is slightly sticky, and the stain resistance is poor. When the nano silicon dioxide aqueous dispersion inorganic film forming material is used for forming a film, the hardness of the film forming additive is not required to be good, but the problem that the film is poor in flexibility and easy to crack exists.
Therefore, the inorganic film-forming material of the bio-based acrylic emulsion and the nano-silica aqueous dispersion is prepared into the inorganic nano-silica hybrid bio-based acrylic emulsion super-hydrophilic surface outer wall coating by matching pigments and fillers according to a proper proportion, and acrylic emulsion particles and nano-silica particles are hybridized into a super-hydrophilic coating film with certain strength, cracking resistance and toughness and rich silicon hydroxyl groups on the surface due to osmotic pressure formed by water volatilization during the film forming of the outer wall coating, so that the outer wall coating film has good stain resistance and easy cleaning performance.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides an inorganic nano silicon dioxide hybrid bio-based acrylic acid exterior wall coating.
In order to solve the problems, the invention provides an inorganic nano-silica hybrid bio-based acrylic exterior wall coating, which is characterized in that the raw materials comprise, by mass, 10-60% of a bio-based acrylic emulsion, 1-10% of an anti-freezing agent, 10-50% of a nano-silica aqueous dispersion, 1-6% of a film forming additive, 0.01-1% of a pH regulator, 5-25% of titanium dioxide, 0-50% of an inorganic filler, 0.2-1.5% of a dispersant, 0-20% of a water-based color paste, 0.01-0.5% of an antifoaming agent, 0.1-0.3% of a dry film mildew-proof anti-algae agent, 0.1-0.5% of a bactericide, 1-5% of a rheological additive and the balance of.
Preferably, 20-80% of the nano-silica aqueous dispersion is NALCO1030 of NALCO company of America, wherein the pH value of the nano-silica aqueous dispersion is 7.5-10.5, and the solid content is 30 +/-1%.
Preferably, the biobased acrylic emulsion is Wanhua
8171 the emulsion has pH of 7.5-10.5 and solid content of 48 + -1%.
Preferably, the water is city tap water or deionized water.
Preferably, the pH adjuster is at least one of an alkali metal hydroxide, an alkali metal carbonate/bicarbonate, an organic amine compound, and an organosilicon-modified pH adjuster.
Preferably, the antifreeze is a polyhydric alcohol.
Preferably, the antifoaming agent is a mineral oil type or silicone type antifoaming agent.
Preferably, the rheological additive adopts American Dow aqueous associative thickener.
The invention also provides a preparation method of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating, which is characterized in that water, an antifreezing agent, a dispersing agent and a pH regulator are sequentially added into a coating dispersion kettle under the stirring condition, the pH value is adjusted to 8.0-9.5, titanium dioxide is added under the stirring condition after uniform stirring, and the dispersion is carried out for 5-10 minutes; adding inorganic filler, dispersing for 30-60 minutes, adding film-forming auxiliary agent, dispersing for 2-5 minutes, reducing stirring speed, stirring, adding bio-based acrylic emulsion, nano-silica water dispersion, bactericide, rheological auxiliary agent and defoamer, and stirring for 15-60 minutes to obtain inorganic nano-silica hybrid bio-based acrylic exterior wall paint; when necessary, adding the water-based color paste for blending color, and blending to the required color to finish the preparation process.
The invention also provides application of the inorganic nano silicon dioxide hybrid bio-based acrylic acid exterior wall coating, which is characterized in that the conventional building exterior wall primer is constructed firstly, and a coating film constructed by the primer is fully dried according to the time required by the specification; and then, the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating is applied to the previous paint film for 1-2 times, wherein the time interval between the two times of application is not less than 2 hours.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a layer of hybridized external wall coating is formed on the surface of a conventional paint film, acrylic emulsion particles and nano silicon dioxide particles are forcibly extruded and hybridized into high integration in high osmotic pressure formed by water volatilization during the film forming of the external wall coating, and the external wall coating has good strength, cracking resistance and toughness, is rich in a silicon hydroxyl group super-hydrophilic coating film on the surface of the paint film, and has good stain resistance and easy cleaning performance.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below.
Example 1
The raw materials of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating comprise, by mass, 25.40% of water, 1.00% of an antifreezing agent, 1.50% of a dispersing agent, 0.20% of a pH regulator, 20.00% of titanium dioxide, 12.00% of an inorganic filler, 24.00% of a bio-based acrylic acid emulsion, 14.00% of a nano-silica water dispersion, 1.20% of a film-forming assistant, 0.20% of an antifoaming agent, 0.30% of mildew and algae prevention, 0.10% of a bactericide and 0.10% of a rheological assistant.
The nanometer silicon dioxide water dispersion is NALCO1030 of NALCO company in America, the pH value is 7.5-10.5, and the solid mass content is 30 +/-1%.
The bio-based acrylic emulsion is Wanhua
8171 emulsion with pH value of 7.5-10.5 and solid content of 48 + -1%.
The water is conventional tap water or deionized water.
The pH regulator is potassium hydroxide with the mass concentration of 40 +/-1%.
The coalescent was coasol 290.
The antifreezing agent is propylene glycol.
The Dispersant is a Dispersant for a homopolycarboxylic acrylic acid sodium salt SN-Dispersant 5040 water-based paint of Santa Nuo family.
The defoaming agent is polycarboxylic acid type defoaming agent WS 360.
The titanium white is rutile titanium white R996
The inorganic filler is 1500 meshes heavy calcium carbonate powder
The mildew-proof algaecide is a dry film mildew-proof algaecide of a water-based coating, namely American Kelain DFX-1 mildew-proof agent.
The bactericide is a water-based paint in-tank preservative Dow 631.
The rheological additive adopts American Dow aqueous association type thickener.
The preparation method of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating comprises the following steps: sequentially adding water, an antifreezing agent, a dispersing agent and a pH regulator into a coating dispersion kettle under the stirring condition to adjust the pH value to 8.0-9.5, uniformly stirring, then adding titanium dioxide under the high-speed stirring condition to disperse for 5-10 minutes, then adding an inorganic filler to disperse for 30-60 minutes at a high speed, adding a film-forming additive to disperse for 2-5 minutes, reducing the stirring speed to slow stirring, adding a bio-based acrylic emulsion, adding a nano-silica water dispersion liquid, adding a bactericide, adding a rheological additive, adding a defoaming agent to stir for 15-60 minutes to obtain the inorganic nano-silica hybrid bio-based acrylic exterior wall coating.
The inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating comprises the following components in parts by weight: firstly, constructing the primer of the conventional building outer wall, wherein a coating film constructed by the primer is fully dried completely according to the time required by the specification; and then, the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating is applied to the previous paint film for 2 times, wherein the time interval between the two times of application is not less than 2 hours.
Example 2
The raw materials of the inorganic nano-silica hybridized bio-based acrylic acid exterior wall coating comprise, by mass, 23.20% of water, 1.00% of an antifreezing agent, 1.50% of a dispersing agent, 0.20% of a pH regulator, 18.00% of titanium dioxide, 18.00% of an inorganic filler, 24.00% of a bio-based acrylic acid emulsion, 12.00% of a nano-silica water dispersion, 1.20% of a film forming aid, 0.20% of a defoaming agent, 0.30% of mildew and algae prevention, 0.20% of a bactericide, 0.20% of a rheological aid and 1.00% of a water-based color paste.
The nanometer silicon dioxide water dispersion is NALCO1030 of NALCO company in America, the pH value is 7.5-10.5, and the solid mass content is 30 +/-1%.
The bio-based acrylic emulsion is Wanhua
8171 emulsion with pH value of 7.5-10.5 and solid content of 48 + -1%.
The water is conventional tap water or deionized water.
The pH regulator is potassium hydroxide with the mass concentration of 40 +/-1%.
The coalescent was coasol 290.
The antifreezing agent is propylene glycol.
The Dispersant is a Dispersant for a homopolycarboxylic acrylic acid sodium salt SN-Dispersant 5040 water-based paint of Santa Nuo family.
The defoaming agent is polycarboxylic acid type defoaming agent WS 360.
The titanium white is rutile titanium white R996
The inorganic filler is 1500 meshes heavy calcium carbonate powder
The mildew-proof algaecide is a dry film mildew-proof algaecide of a water-based coating, namely American Kelain DFX-1 mildew-proof agent.
The bactericide is a water-based paint in-tank preservative US Dow 631.
The rheological additive adopts American Dow aqueous association type thickener.
The water-based color paste is universal color paste for water-based architectural coatings of the world-name company
The preparation method of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating comprises the following steps: sequentially adding water, an antifreezing agent, a dispersing agent and a pH regulator into a coating dispersion kettle under the stirring condition to adjust the pH value to 8.0-9.5, uniformly stirring, then adding titanium dioxide under the high-speed stirring condition to disperse for 5-10 minutes, then adding an inorganic filler to disperse for 30-60 minutes at a high speed, adding a film-forming additive to disperse for 2-5 minutes, reducing the stirring speed to slow stirring, adding a bio-based acrylic emulsion, adding a nano-silica water dispersion liquid, adding a bactericide, adding a rheological additive, adding a defoaming agent to stir for 15-30 minutes to obtain the inorganic nano-silica hybrid bio-based acrylic exterior wall coating. Adding the water-based color paste for blending color, and blending to the required color to finish the preparation process.
The use method of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating comprises the following steps: firstly, constructing the primer of the conventional building outer wall, wherein a coating film constructed by the primer is fully dried completely according to the time required by the specification; and then, the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating is applied to the previous paint film for 2 times, wherein the time interval between the two times of application is not less than 2 hours.
Claims (10)
1. The inorganic nano-silica hybridized bio-based acrylic acid exterior wall coating is characterized by comprising, by mass, 10-60% of bio-based acrylic acid emulsion, 1-10% of an antifreezing agent, 10-50% of a nano-silica aqueous dispersion, 1-6% of a film forming additive, 0.01-1% of a pH regulator, 5-25% of titanium dioxide, 0-50% of an inorganic filler, 0.2-1.5% of a dispersing agent, 0-20% of a water-based color paste, 0.01-0.5% of an antifoaming agent, 0.1-0.3% of a dry film mildew-proof algaecide, 0.1-0.5% of a bactericide, 1-5% of a rheological additive and the balance of water.
2. The inorganic nano-silica hybrid bio-based acrylic exterior wall coating of claim 1, wherein 20-80% of nano-silica aqueous dispersion is NALCO1030 of NALCO corporation, USA, wherein pH of nano-silica aqueous dispersion is 7.5-10.5, and solid content is 30 ± 1%.
3. The inorganic nano-silica hybrid bio-based acrylic exterior wall coating of claim 1, wherein the bio-based acrylic emulsion is Wanhua
8171 the emulsion has pH of 7.5-10.5 and solid content of 48 + -1%.
4. The inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating of claim 1, wherein the water is city tap water or deionized water.
5. The inorganic nanosilica hybrid bio-based acrylic exterior wall coating of claim 1, wherein the pH modifier is at least one of an alkali metal hydroxide, an alkali metal carbonate/bicarbonate, an organic amine compound and an organosilicon modified pH modifier.
6. The inorganic nano-silica hybrid bio-based acrylic exterior wall coating of claim 1, wherein the anti-freezing agent is a polyol.
7. The inorganic nano-silica hybrid bio-based acrylic exterior wall coating according to claim 1, wherein the defoamer is a mineral oil type or silicone type defoamer.
8. The inorganic nano-silica hybrid bio-based acrylic exterior wall coating of claim 1, wherein the rheology adjuvant employs a Dow aqueous associative thickener.
9. The preparation method of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating of any one of claims 1 to 8, characterized in that water, an antifreeze agent, a dispersant and a pH regulator are sequentially added into a coating dispersion kettle under the stirring condition, the pH value is adjusted to 8.0 to 9.5, titanium dioxide is added under the stirring condition after uniform stirring, and the dispersion is carried out for 5 to 10 minutes; adding inorganic filler, dispersing for 30-60 minutes, adding film-forming auxiliary agent, dispersing for 2-5 minutes, reducing stirring speed, stirring, adding bio-based acrylic emulsion, nano-silica water dispersion, bactericide, rheological auxiliary agent and defoamer, and stirring for 15-60 minutes to obtain inorganic nano-silica hybrid bio-based acrylic exterior wall paint; when necessary, adding the water-based color paste for blending color, and blending to the required color to finish the preparation process.
10. The application of the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating of any one of claims 1 to 8, characterized in that, a conventional building exterior wall primer is firstly constructed, and a coating film constructed by the primer is fully dried according to the time required by the specification; and then, the inorganic nano-silica hybrid bio-based acrylic acid exterior wall coating is applied to the previous paint film for 1-2 times, wherein the time interval between the two times of application is not less than 2 hours.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732864A (en) * | 2020-07-07 | 2020-10-02 | 安徽新大陆特种涂料有限责任公司 | Production process of external wall coating easy to clean and wipe |
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| US20180126363A1 (en) * | 2015-08-28 | 2018-05-10 | The Procter & Gamble Company | Catalysts For The Dehydration Of Hydroxypropionic Acid And Its Derivatives |
| CN105462426A (en) * | 2015-11-25 | 2016-04-06 | 三棵树涂料股份有限公司 | Waterborne biological-based paint with efficient weather resistance, water resistance and stain resistance and preparation method thereof |
| US20180171051A1 (en) * | 2016-12-19 | 2018-06-21 | Celanese International Corporation | Waterborne acrylic dispersions with high biorenewable content |
| CN107974108A (en) * | 2017-11-06 | 2018-05-01 | 鳄鱼制漆(上海)有限公司 | Reactive organic hybrid inorganic nano silica finish and its preparation and application |
| CN108912916A (en) * | 2018-06-25 | 2018-11-30 | 安徽喜宝高分子材料有限公司 | A kind of Emulsion paint for external wall |
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