CN112724720B - Water-based environment-friendly inorganic paint for interior walls and preparation method thereof - Google Patents
Water-based environment-friendly inorganic paint for interior walls and preparation method thereof Download PDFInfo
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- 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
- C09D7/63—Additives non-macromolecular organic
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- 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
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Abstract
The invention belongs to the technical field of interior wall coatings, and particularly discloses a water-based environment-friendly interior wall inorganic coating and a preparation method thereof. According to the invention, the silicate, the aqueous silane sol and the colloidal silica are mixed, and through the selection and the proportion of the raw materials and the mutual cooperation, the aqueous inorganic paint for the interior wall has high storage stability and good combination effect with the wall surface, the scrubbing resistance and the water resistance are obviously improved, and the aqueous inorganic paint is environment-friendly and flame retardant.
Description
Technical Field
The invention relates to the technical field of interior wall coatings, in particular to a water-based interior wall inorganic coating and a preparation method and application thereof.
Background
Most of the existing water-based wall coatings for interior decoration in the market are emulsion paints, wherein the emulsion paints are prepared by dispersing fine particles in water by using synthetic resin and the action of an emulsifier to form emulsion, taking the emulsion as a main film forming substance, and adding pigments, auxiliaries, fillers and the like. The film forming material takes styrene-acrylic emulsion as a main high molecular material and contains a small amount of vinyl acetate-acrylic emulsion and pure acrylic emulsion, and because organic solvents are added to the latex paint from the synthesis of raw materials to the production and coating processes of the paint, toxic organic gases such as formaldehyde and benzene are released after the latex paint is used, the indoor air quality is generated, and certain harm is caused to human bodies. In addition, the coating has the defects of poor weather resistance, easy aging, easy powder removal of a coating film, large amount of required auxiliary agent in the production process, inflammability and the like. Aims to solve the problems of health, safety, environmental protection and the like in the emulsion paint. Therefore, the development of the water-based inorganic coating for the inner wall has obvious positive significance.
The water-based inorganic paint for inner walls is prepared by using alkali metal silicate and emulsion as main binders, inorganic mineral pigment and inorganic mineral filler, and adopting a brushing, spraying or rolling method to form a thin decorative coating on buildings, does not contain formaldehyde, volatile organic compounds, heavy metals and the like, and is suitable for coating inner walls of building walls. Although the water-based inorganic paint for interior walls is environment-friendly and safe, a plurality of problems in the aspects of water resistance, surface hardness, wear resistance and the like still need to be solved, and the inorganic silicate paint has the defects of large volume shrinkage in the film forming process, rigidity of a formed coating film, easy generation of cracks, micropores and the like. At present, the application and research of some water-based inorganic coatings for interior walls also exist in the prior art. Such as: chinese patent CN109777162A discloses water, silica sol, potassium silicate and diatomite, wherein the diatomite is diatomite loaded with nano titanium dioxide, and also comprises various functional additives, the components are complex and various, and the embodiment mode shows that each component is the key condition, the lack or the substitution can bring adverse effect to the performance of the paint, and the performances of the water resistance, the friction resistance, the hardness and the like are not objectively and comprehensively explained. CN 201510766239.4A water-based PVA modified interior wall functional coating, which is a wax emulsion that takes a modified PVA emulsion as a main raw material and can prevent the permeation of water vapor by matching with hydrophobicity, and achieves the effects of water resistance and brushing resistance.
In the existing water-based inorganic paint for interior walls, the technical means adopted in order to solve the technical problems of water resistance, surface hardness, wear resistance and the like of the water-based inorganic paint for interior walls are different. How to further improve the performances of the water-based inorganic paint for interior walls, such as water resistance, binding force with the former, brushing resistance and the like, is a technical problem to be solved by the invention.
Disclosure of Invention
The invention provides a water-based environment-friendly inorganic coating for interior walls and a preparation method thereof, aiming at solving the problems in the background art, through the selection and modification of raw materials and the mutual synergistic action among the components, the prepared inorganic water-based coating can not fall off, not pulverize and smell-less when being used for interior walls, and can make remarkable progress in the aspects of water resistance, washing resistance and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
the water-based environment-friendly inorganic coating for the interior wall comprises the following raw materials in parts by weight:
5-20 parts of silicate
3-10 parts of water-based silane sol
10-25 parts of colloidal silicon dioxide
40-60 parts of modified inorganic filler
1-3 parts of thickening agent
0 to 2 parts of dispersant
0.5 to 1.2 parts of water-based wetting agent
150-200 parts of water
Wherein the inorganic filler is prepared by mixing two or more of titanium dioxide, kaolin, calcium carbonate, talcum powder and diatomite. And pigments of other colors can be added according to requirements to prepare interior wall coatings of different colors.
Preferably, when the inorganic filler is compounded first and then surface-modified, the mass ratio between the fillers is not particularly limited.
Taking titanium dioxide/kaolin as an example, the specific compounding method comprises the following steps: mixing a titanium dioxide nanoparticle dispersion liquid and a kaolin nanoparticle dispersion liquid in a mass ratio of 1: 1-5, carrying out ultrasonic treatment for 30-100 min, drying at 60-100 ℃ for 8-36 h, taking out the solid, grinding, and sieving to obtain titanium dioxide/kaolin composite powder with the particle size of less than 0.3 mu m.
Further preferably, the surface of the inorganic powder filler is also required to be modified: dispersing inorganic composite powder in water, adding a surface treating agent, heating to 60-80 ℃, stirring and dispersing for 30-100 min, stirring, filtering and drying to obtain the modified inorganic powder filler.
Wherein the surface treating agent is: and 3-glycidyl ether oxypropyltriethoxysilane is added in an amount of 0.3 to 0.5% by mass based on the inorganic powder.
1. Compared with the inorganic powder which is not compounded, the inorganic powder after being compounded is dispersed in a system more uniformly and stored more stably, the washing resistance of a coating after being used can be obviously improved, and the surface temperature of a building can be better reduced by the composite particles.
2. The 3-glycidyl ether oxypropyltriethoxysilane is a result of optimization of a large number of experiments, and compared with other treatment agents, the surface treatment agent can remarkably improve the water resistance of the coating and improve the adhesive force and the binding force of the coating on a wall surface, and the modified inorganic filler is stable in storage and free from yellowing, discoloration and other phenomena after long-term storage. In addition, the surface of the inorganic powder filler modified by 3-glycidyl ether oxypropyl triethoxysilane also has epoxy groups, and the epoxy groups react with amino groups of a preferable aqueous silane sol in the preparation process, so that the dispersibility and compatibility of inorganic particles in a system are further improved, the brittleness of an inorganic building coating for an inner wall is improved, and the bonding force, water resistance and other properties of the inner wall coating are improved.
Further, the silicate is one or a mixture of potassium silicate, sodium silicate and lithium silicate.
Further, the aqueous silane sol is a coupling agent selected from Germany Wingchungdusai
HYDROSIL 1151、
One or two of the above-mentioned HYDROSIL 2776.
The aqueous silane sol is a result of optimization of a large number of experiments, the two aqueous silane sols do not contain VOC, and the aqueous silane sol is environment-friendly, and in the using process, a silanol group can be in bonding reaction with a wall surface, and an amino group can also interact with an inorganic filler containing an epoxy group, so that the mechanical property and the water resistance of the coating are obviously improved.
Further, the particle size of the colloidal silica is less than 100nm, and SiO in the inorganic silica sol2The mass content is 20-30%.
Further, the thickener is hydroxyethyl cellulose;
further, the aqueous dispersant is a dispersant SN-5027 of Nonopraceae;
the dispersant can be added according to the requirement, the dosage of the traditional dispersant can be obviously reduced through the modified organic particles, and the preferred dosage is 0.3-0.6 part.
Further, the aqueous wetting agent is a basf (konin) aqueous paint wetting agent, Hydropalat 875.
A preparation method of the water-based environment-friendly inorganic paint for the interior wall comprises the following steps: adding the modified inorganic filler into water, dispersing for 10-20 min, adding silicate, aqueous silane sol, colloidal silica, a thickening agent, a dispersing agent and an aqueous wetting agent, mixing, adjusting the pH to 9-12, continuously stirring and uniformly mixing, and grinding to obtain the aqueous interior wall inorganic coating.
When the inorganic coating is prepared, the pH value needs to be adjusted to 9-12 (preferably 9-10). In the pH range, the obtained water-based inorganic coating for the inner wall has high storage stability, can chemically react with a mineral wall surface after being used, is alkaline with the wall surface, is not attacked by the alkalinity of the wall surface, can effectively prevent the phenomena of pulverization, falling off and the like, has good combination effect with the wall surface, and can improve the adhesive force, the washing resistance and the water resistance of the coating.
Compared with the prior art, the invention has the beneficial effects that: the invention takes alkali metal silicate, aqueous silicasol and silicasol as main adhesives, and compounds organic modified filler to prepare the aqueous environment-friendly interior wall inorganic coating, and all components are cooperated with each other, thereby not only solving the problems of non-environment protection, non-flame retardation, powder falling and even shedding and the like of the traditional emulsion paint, but also effectively solving the problems of poor storage stability and poor water resistance of the existing aqueous inorganic interior wall coating. Finally, the composite material prepared by the invention has the comprehensive properties of environmental friendliness, flame retardance, water resistance, washing resistance, good storage stability and the like.
Detailed Description
The invention is described in more detail below with reference to the following examples: wherein the colloidal silicon dioxide is MOS-2012, and the purchasing manufacturer is Xiamen rattan material science and technology company, and other materials are conventional commercial products without special limitation.
Example 1
The water-based environment-friendly inorganic coating for the interior wall comprises the following raw materials in parts by weight:
12 portions of sodium silicate
Aqueous silane sol (C)
HYDROSIL 1151) 8 parts
15 parts of colloidal silicon dioxide
45 parts of modified inorganic filler
Hydroxyethyl cellulose 1 part
0.5 portion of dispersant (SN-5027)
0.8 part of aqueous wetting agent (Hydropalat 875)
180 portions of water
The preparation method of the modified inorganic filler comprises the following steps:
mixing titanium dioxide nano particle dispersion liquid, kaolin nano particle dispersion liquid and calcium carbonate nano particle dispersion liquid according to the mass ratio of 1: 3:1, drying for 8 hours at 60 ℃ after ultrasonic treatment for 50min, grinding the compound, and sieving to obtain titanium dioxide/kaolin/calcium carbonate compound powder with the particle size of less than 0.15 mu m;
according to the mass ratio of 1:10, titanium dioxide/kaolin/calcium carbonate composite powder is dispersed in water, then 3-glycidyl ether oxypropyl triethoxysilane accounting for 0.4% of the mass of the composite powder is added, the mixture is heated to 60 ℃, stirred and dispersed for 50min, and after stirring, the mixture is filtered, dried, ground and sieved to obtain the modified inorganic filler with the particle size of less than 0.15 mu m.
The preparation method of the water-based environment-friendly interior wall inorganic coating comprises the following steps: adding the modified inorganic filler into water, adding sodium silicate, aqueous silane sol, colloidal silica, a thickening agent, an aqueous dispersing agent and an aqueous wetting agent after dispersion, adjusting the pH to 9 after mixing, continuously stirring and uniformly mixing, and grinding to obtain the aqueous interior wall inorganic coating.
Example 2
The water-based environment-friendly inorganic coating for the interior wall comprises the following raw materials in parts by weight:
10 portions of potassium silicate
Aqueous silane sol (C)
HYDROSIL 2776) 10 parts
10 parts of colloidal silicon dioxide
55 parts of modified inorganic filler
2 portions of hydroxyethyl cellulose
1 part of dispersant (SN-5027)
0.7 part of aqueous wetting agent (Hydropalat 875)
180 portions of water
The preparation method of the modified inorganic filler comprises the following steps: mixing titanium dioxide nano particle dispersion liquid and kaolin nano particle dispersion liquid according to the mass ratio of 1: 5, mixing, carrying out ultrasonic treatment for 50min, drying at 80 ℃ for 10h, grinding the compound, and sieving to obtain titanium dioxide/kaolin compound powder with the particle size of less than 0.2 mu m;
according to the mass ratio of 1:10, dispersing titanium dioxide/kaolin composite powder in water, adding 3-glycidyl ether oxypropyl triethoxysilane accounting for 0.3% of the mass of the composite powder, heating to 80 ℃, stirring and dispersing for 100min, and filtering, drying, grinding and sieving after stirring to obtain the modified inorganic filler with the particle size of less than 0.2 mu m.
The preparation method of the water-based environment-friendly interior wall inorganic coating comprises the following steps: adding the modified inorganic filler into water, adding potassium silicate, aqueous silane sol, colloidal silicon dioxide, a thickening agent, a dispersing agent and an aqueous wetting agent after dispersion, adjusting the pH value to 10 after mixing, continuously stirring and uniformly mixing, and then grinding to obtain the aqueous interior wall inorganic coating.
Example 3
The water-based environment-friendly inorganic coating for the interior wall comprises the following raw materials in parts by weight:
5 parts of lithium silicate
Aqueous silane sol (C)
HYDROSIL 2776) 10 parts
20 parts of colloidal silicon dioxide
40 portions of modified inorganic filler
Hydroxyethyl cellulose 3 parts
0 portion of dispersant (SN-5027)
0.5 part of aqueous wetting agent (Hydropalat 875)
150 portions of water
The preparation method of the modified inorganic filler comprises the following steps:
mixing the talcum powder nano particle dispersion liquid and the calcium carbonate nano particle dispersion liquid according to the mass ratio of 2:3, drying at 100 ℃ for 12 hours after carrying out ultrasonic treatment for 100 minutes, grinding the compound, and sieving to obtain titanium dioxide/kaolin/calcium carbonate compound powder with the particle size of less than 0.3 mu m;
according to the mass ratio of 1:10, dispersing talcum powder/calcium carbonate composite powder in water, adding 3-glycidyl ether oxypropyl triethoxysilane accounting for 0.5 percent of the mass of the composite powder, heating to 80 ℃, stirring and dispersing for 100min, and filtering, drying, grinding and sieving after stirring to obtain the modified inorganic filler with the particle size of less than 0.3 mu m.
The preparation method of the water-based environment-friendly interior wall inorganic coating comprises the following steps: adding the modified inorganic filler into water, adding lithium silicate, aqueous silane sol, colloidal silicon dioxide, a thickening agent, an aqueous dispersing agent and an aqueous wetting agent after dispersion, adjusting the pH value to 10 after mixing, continuously stirring and uniformly mixing, and then grinding to obtain the aqueous interior wall inorganic coating.
Comparative example 1
Comparative example 1 is different from example 1 in that: the surface of the inorganic filler was modified with KH-550 silane coupling agent, and the other operations were the same as in example 1.
Comparative example 2
Comparative example 2 differs from example 1 in that: the surface of the inorganic filler was not modified, and the other operations were the same as in example 1.
Comparative example 3
Comparative example 3 differs from example 1 in that: the same procedure as in example 1 was repeated except that the aqueous silane sol was not added and the colloidal silica was replaced by an equal amount.
Comparative example 4
Comparative example 4 is different from example 1 in that: the procedure of example 1 was otherwise the same as except that colloidal silica was not added and silica powder was added instead of the silica powder in terms of the amount of silica contained.
Comparative example 5
Comparative example 5 differs from example 1 in that:
the HYDROSIL 1151 aqueous silane sol was replaced with KH-560 and the other operations were the same as in example 1.
The aqueous environment-friendly inorganic coating for the inner wall prepared in the examples 1 to 3 is placed in a container, no agglomeration and no precipitation are generated after stirring, the coating is in a uniform state, then the coating is constructed, the coating can be directly used after preparation, if necessary, the coating can be slightly diluted to obtain a proper construction concentration, the coating is brushed on a cement flat plate for 2 times, a dry film is brushed for about 100 micrometers each time, the brushing process is free of obstacles, the construction performance is good, the VOC emission is 0, free formaldehyde is not detected, the standard requirements of GB18582-2008 'indoor decoration materials and limited harmful substances in inner wall coatings' are completely met, and the fire-proof grade reaches A level.
The aqueous environment-friendly inorganic paint for interior walls prepared in examples 1 to 3 and comparative examples 1 to 5 was applied by the same method for 2 times, the thickness of the applied dry paint film was 200 μm and measured, and the details of the measured results are shown in tables 1 and 2.
TABLE 1
TABLE 2
Wherein the heat storage stability and the water resistance are detected according to JG/T26-2002 inorganic building coating for exterior walls. Scrub resistance was determined according to GB/T9266-2009 architectural coatings.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all modifications of the above embodiments made according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (2)
1. The water-based environment-friendly inorganic coating for the interior wall is characterized by comprising the following raw materials in parts by weight:
5-20 parts of silicate
3-10 parts of water-based silane sol
10-25 parts of colloidal silicon dioxide
40-60 parts of modified inorganic filler
1-3 parts of thickening agent
0-2 parts of water-based dispersant
0.5 to 1.2 parts of water-based wetting agent
150-200 parts of water;
the silicate is one or a mixture of potassium silicate, sodium silicate and lithium silicate;
the water-based silane sol is one or mixture of German winning Chuanggangsai coupling agent Dynasylan HYDROSIL 1151 and Dynasylan HYDROSIL 2776;
the modified inorganic filler is prepared by compounding two or more of titanium dioxide, kaolin, calcium carbonate, talcum powder and diatomite and modifying the composite powder; the modification method comprises the following steps: dispersing the composite powder in water, adding a 3-glycidyl ether oxypropyl triethoxysilane surface treating agent accounting for 0.3-0.5% of the powder by mass, heating to 60-80 ℃, stirring and dispersing for 30-100 min, stirring, filtering, drying, grinding and sieving to obtain a modified inorganic powder filler;
adding the modified inorganic filler into water, dispersing, adding silicate, aqueous silane sol, colloidal silica, a thickening agent, a dispersing agent and an aqueous wetting agent, mixing, adjusting the pH to 9-12, continuously stirring and uniformly mixing, and grinding to obtain the aqueous interior wall inorganic coating.
2. The aqueous environment-friendly inorganic paint for interior walls as claimed in claim 1, wherein: the thickening agent is hydroxyethyl cellulose; the water-based dispersant is a dispersant SN-5027 of the Nipponica family; the water-based wetting agent is a water-based paint wetting agent Hydropalat 875 of Pasteur (Kenin).
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