CN113881302A - Water-based 5G granite imitation coating and preparation method thereof - Google Patents
Water-based 5G granite imitation coating and preparation method thereof Download PDFInfo
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- CN113881302A CN113881302A CN202011564062.7A CN202011564062A CN113881302A CN 113881302 A CN113881302 A CN 113881302A CN 202011564062 A CN202011564062 A CN 202011564062A CN 113881302 A CN113881302 A CN 113881302A
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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
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to a water-based 5G granite imitation paint and a preparation method thereof, wherein the paint consists of a pigment part, a granulation intermediate with a lubricating and isolating protection function and emulsion paint for endowing the paint with film forming and weather resistance; the preparation method comprises (1) preparing base paint; (2) preparing a granulation intermediate; (3) preparing emulsion paint; (4) preparing a water-based 5G granite imitation coating: mixing the base paint and the color paste for color matching to form a pigment part, then coating the pigment part by a granulation intermediate, granulating through a screen under pressure, then adding the emulsion paint, mechanically stirring and blending uniformly, and standing for reaction to obtain the water-based 5G granite imitation paint. Compared with the prior art, the invention is specially used for replacing the conventional real stone paint in appearance, is different from the water-based colorful building paint in structural composition, has the engineering price not higher than that of the conventional real stone paint, and has the cost performance superior to both the real stone paint and the water-based colorful building paint.
Description
Technical Field
The invention relates to the field of stone-like coatings, in particular to a water-based 5G granite stone-like coating and a preparation method thereof.
Background
At present, when the decoration of the building outer wall is carried out by adopting a coating mode, although latex paint containing elastic latex paint is still widely adopted, the appearance is monotonous, the durability is poor, the market is gradually shrunk, and the stone-like building coating is more superior and obviously improved in durability because the appearance is like stones, so that the decoration is remarkable and unobvious.
In the field of stone-like architectural coatings, the main printing products in the market at present are two parts of real stone paint and water-based colorful architectural coatings, the real stone paint has long appearance time and large volume, each link is also operated smoothly and is mature, but a great deal of major defects are exposed, so that people gradually begin to give up the coatings, and the current dilemma of the real stone paint comprises: firstly, the construction is complex and the flower is easy to grow; peeling often occurs; thirdly, the stain resistance is poor; fourthly, cracking is easy to occur in the drying film forming process; easy yellowing; sixthly, the color of the paint film depends on natural colored sand, and the color difference of batches is large; the flexibility is poor, and the anti-cracking capability is seriously insufficient; the dosage is large, the sand drop caused by spraying is serious, the resources are wasted, and the environment is polluted; ninthly, stone mining and color sand manufacturing seriously damage the environment, the energy consumption is high, and neither energy is saved nor emission is reduced; the market for Zhenrong mineral varnish currently has serious excess capacity and competes for athermalization and the like. Therefore, emulsion cannot be used, so that the overall quality of the real stone paint on the market is further seriously reduced, the overall durability is not as good as that of the common elastic coating, even not as good as that of the emulsion paint, and the real stone paint is gradually eliminated.
Then, the waterborne multicolor building coating is produced at the same time, and has become the mainstream choice of stone-like coating gradually due to a plurality of advantages, but the general waterborne multicolor building coating has higher technical threshold due to high construction specialization degree and the special stability problem of production and storage, and the engineering price is 10-50% higher than that of real stone paint engineering.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the water-based 5G granite imitation paint which is specially used for replacing the conventional real stone paint in appearance, is different from the water-based colorful building paint in structural composition, has the engineering price not higher than that of the conventional real stone paint, has the cost performance superior to that of the real stone paint and that of the water-based colorful building paint, and the preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
multicolor paint is a two-phase chemical gel material, which is a fundamental difference from general paint, thereby causing great difference from general paint in physical and chemical properties and morphology and performance. Multicolor paint consists of two parts, namely dispersed phase color dots and continuous phase liquid mixture, wherein the dispersed phase is high-viscosity chemical reaction gel, the continuous phase is low-viscosity chemical reaction gel, and the continuous phase is heterogeneous mixture of multicolor gels separated from each other, and general paint, such as building latex paint (including elastic paint and the like), is a phase body and is a physical change product after various raw materials are mechanically stirred, and the general paint is a monochromatic uniform mixture.
The oil-in-water multicolor paint in the prior art realizes storage stability by the principle that water and oil are not soluble mutually, but the dispersed phase and the continuous phase of the water-based multicolor paint are both water-based and have the principle of similarity and solubility in terms of chemical principle, and the oil-in-water multicolor paint has large difference of two-phase solubility parameters and is not soluble mutually unlike the real oil-based and water-based paint.
The solubility parameters of the water-based multicolor paint have small difference between two phases, so that the water-based multicolor paint is naturally compatible with each other. Although there is theoretically a hydrophobic film on the surface of the dispersed phase particles, the hydrophobic film is too thin and fragile, and the protective effect is not very strong. That is, the pigmented particles of the aqueous multicolor paint inherently have a tendency to rot in the continuous phase in the barrel, and do not rot because the cohesion of the particles exceeds the destructive power of the continuous phase relative to it. However, the cohesion of the granules cannot be too strong, and the granules cannot be stored more and more strongly, otherwise the granules feel harder during construction, the effect is too convex, and the effect is too much changed from the effect originally expected. The cohesive force of the particles is derived from the hydrogen bonding force of chemical crosslinking reaction and the charge attraction force among the components in the particles, and the destructive force on the particles is the resultant force of the charge repulsion force among the components in the particles and the chemical dissolving force and the buoyancy rheological impact force derived from the continuous phase. The cohesion of the granules cannot be too weak, and the granules cannot be stored to be weaker and weaker, and when the cohesion of the granules is weaker than the destructive power to the granules, the colored spot granules are disintegrated and dissolved in the continuous phase. Neither too strong nor too weak, too many factors affecting balance and dynamic. That is, storage stability is an inherent and all-over problem with waterborne multicolor coatings.
The most basic technical principle of the water-based multicolor paint is that pigment particles with different colors are protected by utilizing the steric hindrance effect generated by inorganic gel such as magnesium lithium silicate around color points and the proper cohesion of the color points, so that the pigment particles can be stably stored, transported and constructed after being mixed together to prepare a finished product, the pigment particles with different colors cannot be disintegrated, dissolved and fused with the color points to damage the multicolor effect, and the inorganic gel such as the magnesium lithium silicate is dissolved in a continuous phase and is a component of the continuous phase.
Therefore, the water-based multicolor paint is a novel paint with very high technical difficulty, the stability of the water-based multicolor paint is realized by depending on the principle that water and oil are incompatible, but depending on the steric hindrance effect existing between particles with different colors and the proper cohesion of the colored dots, so that the situation that the particles with different colors are dissolved or fused when being close to each other under the extrusion of pressure during storage and spraying of the particles with different colors is avoided, as shown in fig. 2, the expected target is realized by only adopting the magnesium silicate lithium protective adhesive in the prior art in terms of the steric hindrance effect around the colored dots, but as mentioned above, the reliability of the steric hindrance formed around the colored dots by only the magnesium silicate lithium protective adhesive is insufficient.
The invention introduces a novel emulsion type stabilizer and modified silica sol, and the emulsion type stabilizer and the modified silica sol react with each other after blending, the reaction product is a liquid organic-inorganic hybrid, the color dots are coated by the hybrid again, the steric hindrance effect of the magnesium lithium silicate protective glue is further enhanced, the effect of lubricating, isolating and protecting the color dots is more stable, and the reaction degree of the hybrid is adjusted simultaneously, so that the aim of adjusting the viscosity of a finished product to a required target is achieved, thus not only the stability of the color dots is improved, but also the water-soluble protective glue, bentonite and an alkali swelling thickener are avoided from being used in large quantities, and the water resistance and durability of the finished product are also obviously improved. Because the base paint color point of the water-based multicolor paint containing the sand mold contains a certain amount of natural quartz sand, the color point is very heavy, and has higher requirements on anti-settling, if the base paint color point is made according to the traditional thought, a large amount of water-soluble protective glue, bentonite and alkali swelling thickener are needed to realize thickening and anti-settling, but the components are water-soluble, and obviously negative effects can be generated on the water resistance durability of a paint film, as shown in figure 3, the specific scheme is as follows:
a water-based 5G granite imitation paint consists of a pigment part, a granulation intermediate with the functions of lubrication, isolation and protection and emulsion paint for endowing the paint with film forming and weather resistance;
the pigment part comprises the following components in parts by mass: 20-40 parts of RO water, 0.7-2.0 parts of cellulose, 0.1-0.3 part of wetting dispersant, 5-15 parts of pigment and filler, 0.1-0.3 part of defoaming agent, 1-2 parts of film-forming additive, 10-30 parts of emulsion, 0-1 part of nano anti-aging agent, 0.8-1.5 parts of anti-freezing agent, 5-15 parts of protective glue solution, 0.2-0.4 part of pH regulator, 0.2-0.4 part of bactericide, 20-50 parts of natural quartz sand and color paste;
the granulation intermediate comprises the following components in parts by mass: 30-80 parts of RO water, 0.1-0.2 part of defoaming agent, 0.5-0.8 part of film-forming assistant, 0.1-0.2 part of wetting agent, 18-36 parts of inorganic protective colloid solution and 0-30 parts of coupling agent modified silica sol;
the emulsion paint comprises the following components in parts by mass: 10-25 parts of RO water, 60-80 parts of emulsion, 0-20 parts of reactive emulsion, 0.1-0.3 part of pH regulator, 0.1-0.3 part of bactericide, 0.1-0.2 part of defoamer, 0.6-2 parts of film-forming assistant, 0.8-1.5 parts of antifreeze, 0-3 parts of bentonite powder material and 0-2 parts of thickener.
Further, the emulsion comprises a water-based acrylic resin and/or a silicone water-based acrylic resin; the cellulose comprises hydroxyethyl cellulose ether; the wetting dispersant comprises a hydrophobic copolymer sodium salt dispersant.
Further, the defoaming agent comprises modified polysiloxane and/or organic silicon modified mineral oil; the pigment and filler comprises one or more of heavy calcium, mica powder, talcum powder or rutile type titanium dioxide; the nanometer aging resistant agent comprises nanometer aging resistant slurry.
Further, the film forming aid comprises a dodecyl alcohol ester; the anti-freezing agent comprises propylene glycol; the pH regulator comprises 2-amino-2-methyl-1-propanol.
Further, the bactericide comprises nitrogen-sulfur heterocyclic compounds without organic volatile; the protective glue solution comprises a modified magnesium lithium silicate aqueous solution; the color paste comprises water-based environment-friendly weather-resistant color paste.
Further, the inorganic protective glue solution comprises a magnesium lithium silicate aqueous solution; the wetting agent comprises a sulfonate wetting agent; the coupling agent modified silica sol comprises titanate coupling agent modified silica sol.
Further, the thickener comprises a hydrophobic modified alkali soluble emulsion thickener and/or an associated polyurethane thickener; the powder material comprises bentonite material; the reactive emulsion comprises a grafted pure acrylic emulsion.
A preparation method of the water-based 5G granite imitation paint comprises the following steps:
(1) preparing a base paint: preparing materials according to a formula, adding cellulose into RO water, after uniform dispersion, sequentially adding a wetting dispersant, a pigment filler and a defoaming agent, and then dispersing at a high speed; then reducing the dispersion speed, sequentially adding a film forming aid, an antifreezing agent, an emulsion, a nano anti-aging agent, a protective glue solution, a pH regulator, a bactericide and natural quartz sand, and uniformly stirring at a constant speed to obtain a base paint;
(2) preparation of granulation intermediate: preparing materials according to a formula, sequentially adding a defoaming agent, a film-forming auxiliary agent, a wetting agent, an inorganic protective colloid solution and coupling agent modified silica sol into RO water, and uniformly stirring at a constant speed to obtain a granulation intermediate;
(3) preparing emulsion paint: preparing materials according to a formula, sequentially adding a pH regulator, a bactericide, a defoaming agent, an antifreezing agent and a film-forming auxiliary agent into RO water, stirring, finally adding a thickening agent, increasing the dispersion speed, and stirring at a constant speed to obtain the emulsion paint;
(4) preparing a water-based 5G granite imitation coating: mixing base paint and color paste for color matching to form a pigment part, then coating the pigment part by a granulation intermediate to provide a steric hindrance effect for the pigment part (a dispersed phase) and exert the protection function of lubrication and isolation of the pigment part, respectively granulating the pigment part according to the sizes of different stone color points after coating, wherein the granulation method is a screen granulation method, granulating the pigment part through a screen under pressure to reach the required size of the color points, then adding emulsion paint, mechanically stirring and blending the mixture uniformly, and standing for reaction to obtain the water-based 5G granite imitation paint.
Further, the dispersion time in the step (1) is 10-20min, the high-speed dispersion rotation speed is 1000-1200rpm, the time is 20-40min, the rotation speed after reducing the dispersion speed is 800-1000rpm, and the uniform stirring time is 8-15 min; the rotation speed of the uniform stirring in the step (2) is 300-500rpm, and the time is 8-15 min.
Further, the stirring speed in the step (3) is 800rpm and 500rpm, the rotating speed after the dispersion speed is increased is 1200rpm and 900 rpm, and the uniform stirring time is 8-15 min; and (4) standing for reaction for 1-4 h.
For the water-based colorful building coating, the stability of the system is difficult to solve all the time, and in terms of the color point stability, other manufacturers often adopt the lithium magnesium silicate protective glue to achieve the expected target, but the invention introduces a novel emulsion type stabilizer, the reaction of the novel emulsion and partial components of the granulation intermediate is relied on, the reaction product is a liquid organic-inorganic hybrid, the color point is coated again by the hybrid, the steric effect is further enhanced, the effect of lubricating, isolating and protecting the color point is firmer, and the reaction degree of the hybrid is adjusted at the same time, so as to achieve the aim of adjusting the viscosity of the finished product to the required target, thus not only improving the stability of the color point, but also avoiding using a large amount of water-soluble protective glue, bentonite and alkali-soluble thickening agent, and obviously improving the water resistance and durability of the finished product.
The appearance of the existing water-based colorful architectural coating is simulated by granite with large patterns, and the substitute object is a great variety of granite. The opponent in appearance of the invention is stone with fine patterns but more sandy feeling and corresponding real stone paint, the main attack direction is more definite, the dominant force attack is concentrated, and the effect is more obvious. The stone-like paint is the stone-like paint with the largest quantity and the largest number of defects at present.
The existing water-based colorful building coating realizes the stability of a system only by virtue of the lubricating and isolating functions of magnesium lithium silicate, but the invention realizes the aim of protecting color points by virtue of the steric hindrance of the magnesium lithium silicate and the steric hindrance of an organic-inorganic hybrid, and has the advantages of higher lubricating and isolating effect, higher reliability and higher stability.
The existing water-based multicolor paint construction technology has high degree of specialization and needs four sets, namely, a transparent closed bottom, a colored primer, a main material and a finish coat.
Compared with the prior art, the invention has the following advantages:
(1) the color is richer, and the stone imitation effect is better; the emulsion content is higher than that of the real stone paint, so that the durability, crack resistance and stain resistance of a paint film are obviously improved compared with that of the real stone paint; the paint film is more compact, the water permeability is lower than that of the real stone paint, the waterproof effect is better, and the aspects of alkali efflorescence resistance, color retention and chalking resistance are all better than those of the real stone paint;
(2) the construction is simple and convenient, and the dosage is 1kg/m2The dosage of the stone-like paint is generally 3-5kg/m2The total engineering price is not higher than that of the stone paint; the batch stability is better, the real stone paint toning is seriously dependent on the color batch stability of natural color sand, which is obviously unreliable, the dyed color sand or calcined color sand are difficult to be applied in large scale due to the respective defects, and the color batch stability is more easily ensured when the 5G granite is toned by weather-resistant color paste;
(3) the water-based 5G granite imitation coating is simpler and more convenient to construct and easier to master by operators; the application of the organic-inorganic hybrid enables the hybrid to have better water resistance and durability; the matching is simpler, and generally, only three coatings of high-covering alkali-resistant same-color primer, main material and finish coat are needed.
Drawings
FIG. 1 is a flow chart of the preparation process of the present invention;
FIG. 2 is a diagram showing the dispersion of conventional aqueous multicolor paint particles;
FIG. 3 is a graph showing the dispersion of the coating particles according to the present invention;
FIG. 4 is the test report of example 6.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
In the invention, no special description is made, and the emulsion is water-based acrylic resin and/or organic silicon water-based acrylic resin; the cellulose is hydroxyethyl cellulose ether; the wetting dispersant is hydrophobic copolymer sodium salt dispersant; the defoaming agent is modified polysiloxane and/or organic silicon modified mineral oil; the pigment and filler is one or more of heavy calcium, mica powder, talcum powder or rutile type titanium dioxide; the nanometer aging resistant agent is nanometer aging resistant slurry; the film-forming additive is dodecyl alcohol ester; the antifreezing agent is propylene glycol; the pH regulator is 2-amino-2-methyl-1-propanol; the bactericide is nitrogen-sulfur heterocyclic compounds without organic volatile matters; the protective glue solution is a modified magnesium lithium silicate aqueous solution; the color paste is water-based environment-friendly weather-resistant color paste; the inorganic protective glue solution is a magnesium lithium silicate aqueous solution; the wetting agent is a sulfonate wetting agent; the coupling agent modified silica sol is titanate coupling agent modified silica sol; the thickening agent is a hydrophobic modified alkali soluble emulsion thickening agent and/or an associated polyurethane thickening agent; the powder material is bentonite material; the reaction type emulsion is graft type pure acrylic emulsion.
The water-based 5G granite imitation coating consists of a pigment part, a granulation intermediate with a lubricating and isolating protection function and emulsion paint for endowing the coating with film forming and weather resistance according to the mass ratio of 2:1:1, as shown in figure 1, and the preparation method comprises the following steps:
(1) pigment part manufacturing step
(1-1) adding RO water with the formula amount into a dispersion cylinder, sequentially adding cellulose, dispersing for 15min to ensure that the cellulose is uniformly dispersed, and after sequentially adding a wetting dispersant, a pigment filler and a defoaming agent, dispersing at a high speed of 1200rpm for 30min at 1000-;
(1-2) reducing the dispersion speed to 800-;
(1-3) mixing colors of the base paint according to requirements to prepare a color part;
(2) a granulation intermediate production step: adding RO water with the formula amount into a dispersion tank, sequentially adding a defoaming agent, a film-forming aid, a wetting agent, an inorganic protective glue solution and a coupling agent modified silica sol, stirring at the uniform speed of 300-500rpm for 10min, and preparing and storing for later use;
(3) the preparation method of the emulsion paint comprises the following steps: adding RO water and various emulsions with the formula ratio into a dispersion cylinder, sequentially adding a pH regulator, a bactericide, a defoamer, an antifreeze and a film-forming aid during stirring at the stirring speed of 500-800rpm, finally adding a thickener, slowly increasing the dispersion speed to 900-1200rpm, stirring at a constant speed for 10min, and storing for later use after detecting the viscosity;
(4) the production flow of the finished product is as follows: the base paint containing natural quartz sand is matched with environment-friendly water-based color pastes with various colors, the colors are firstly mixed according to requirements, then the base paint is coated by a granulation intermediate, a steric hindrance effect is provided for a color material part (a dispersion phase), the lubrication and isolation protection functions of the base paint are exerted, the pigment is respectively granulated according to the sizes of different stone color points after being coated, the granulation method is a screen granulation method, the required color point sizes are reached through different screen sizes under pressure, the granulated materials are mixed according to a proportion, the prepared weather-resistant film-forming latex paint is added, the mechanical stirring and blending are uniform, the standing reaction is carried out for 1 to 4 hours, and the finished product of the water-based 5G granite imitation paint is obtained.
The formula of each component is selected as follows:
1. the formula of the pigment part is selected as follows:
21kg of RO water, 1kg of cellulose, 0.2kg of wetting dispersant, 5kg of pigment filler, 0.3kg of defoaming agent, 1kg of film-forming additive, 10kg of emulsion, 0.5kg of nano anti-aging agent, 0.8kg of antifreezing agent, 10kg of protective glue solution, 0.3kg of pH regulator, 0.3kg of bactericide, 50kg of natural quartz sand and various color pastes.
2. The formula of the granulation intermediate is selected as follows:
80kg of RO water, 0.1kg of defoaming agent, 0.7kg of film-forming additive, 0.2kg of wetting agent, 19kg of inorganic protective glue solution and modified silica sol without coupling agent.
80kg of RO water, 0.1kg of defoaming agent, 0.7kg of film-forming additive, 0.2kg of wetting agent, 19kg of inorganic protective glue solution and 10kg of coupling agent modified silica sol.
③ 80kg of RO water, 0.1kg of defoamer, 0.7kg of film-forming additive, 0.2kg of wetting agent, 19kg of inorganic protective glue solution and 20kg of coupling agent modified silica sol.
80kg of RO water, 0.1kg of defoaming agent, 0.7kg of film-forming additive, 0.2kg of wetting agent, 19kg of inorganic protective glue solution and 30kg of coupling agent modified silica sol.
3. The formula of the latex paint is selected as follows:
17.5kg of RO water, 75kg of emulsion, 0kg of reactive emulsion, 0.2kg of pH regulator, 0.2kg of bactericide, 0.1kg of defoamer, 1kg of film-forming assistant, 1kg of antifreeze, 3kg of bentonite powder material and 2kg of thickener.
21.3kg of RO water, 75kg of emulsion, 10kg of reactive emulsion, 0.2kg of pH regulator, 0.2kg of bactericide, 0.1kg of defoamer, 1kg of film-forming assistant, 1kg of antifreeze, 1kg of bentonite powder material and 0.2kg of thickener.
③ 21.3kg of RO water, 75kg of emulsion, 20kg of reactive emulsion, 0.2kg of pH regulator, 0.2kg of bactericide, 0.1kg of defoamer, 1kg of film-forming assistant, 1kg of antifreeze, 1kg of bentonite powder material and 0.2kg of thickener.
Example 1
Mixing a pigment part I, a granulation intermediate I and emulsion paint I according to the mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint without hybridization reaction as a blank group.
Example 2
Mixing the pigment part I, the granulation intermediate II and the emulsion paint II in a mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint with hybridization reaction.
Example 3
Mixing the pigment part, the granulation intermediate and the emulsion paint according to the mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint with hybridization reaction.
Example 4
Mixing the pigment part, the granulation intermediate part and the latex paint according to the mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint with hybridization reaction.
Example 5
Mixing the pigment part, the granulation intermediate and the latex paint according to the mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint with hybridization reaction.
Example 6
Mixing the pigment part, the granulation intermediate and the emulsion paint according to the mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint with hybridization reaction.
Example 7
Mixing the pigment part, the granulation intermediate part and the latex paint according to the mass ratio of 2:1:1 to obtain the water-based 5G granite imitation paint with hybridization reaction.
The orthogonal experimental data are tabulated below:
in the example 1, when the weather-resistant film-forming latex paint and the granulating intermediate are matched and combined, the latex paint is a blank group without hybrid reaction, because the reliability is insufficient only by using the lithium magnesium silicate protective adhesive, the agglomeration abnormality occurs after the storage for 7 days at-5 ℃, the product is pasted after spraying, the appearance effect is poor, even if the spraying is diluted by adding water, the color point is not clear, the layering and the thinning are obvious in hot storage, the abnormal phenomena of color bleeding, color point hardening and the like also occur in the aspect of appearance, a large amount of bentonite and alkali swelling thickener are added in the formula, and even if the lithium magnesium silicate is used to a lower limit, the water whitening resistance of a paint film is still obvious, and the paint film has foaming abnormality.
However, in the formula with the hybridization reaction, the lithium magnesium silicate is also used to the lower limit, the dosage of the thickening agent in the formula is greatly reduced, and the thickening agent is not needed in most of the time, so the dosage is also arranged in the formula because the aqueous multicolor paint and products such as 5G granite have high uncertainty and the viscosity stability fluctuates due to the change of air temperature.
In example 2, when the weather-resistant film-forming latex paint is combined with the granulation intermediate II, the hybridization reaction degree is lowest, and the thickening agent in the formula is little, so the viscosity of the finished product is lowest, and the finished product does not meet the factory requirements.
In example 7, when the weather-resistant film-forming latex paint (c) and the granulation intermediate (c) are combined, the hybridization reaction degree is highest, the viscosity of the finished product is too high, particularly, the finished product is frozen after being stored in cold without caking, and can be normally constructed only by adding water for dilution, but the construction effect is clear after adding water for dilution, and the requirements are met. The combination is not suitable for finished product delivery.
In example 6, when the weather-resistant film-forming latex paint and the granulation intermediate are combined in a matched manner, each index of the finished product is nearly perfect, not only the protective function of the lower-limit used magnesium lithium silicate can still normally play a role, but also the organic-inorganic hybrid further lubricates and isolates color points, the protective function is enhanced, the product system is stabilized, the performance of the paint film is obviously improved, the paint film is sent to a national third-party detection mechanism for detection, and a performance report is shown in fig. 4.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. A water-based 5G granite imitation paint is characterized in that the paint consists of a pigment part, a granulation intermediate with a lubricating and isolating protection function and emulsion paint for endowing the paint with film forming and weather resistance;
the pigment part comprises the following components in parts by mass: 20-40 parts of RO water, 0.7-2.0 parts of cellulose, 0.1-0.3 part of wetting dispersant, 5-15 parts of pigment and filler, 0.1-0.3 part of defoaming agent, 1-2 parts of film-forming additive, 10-30 parts of emulsion, 0-1 part of nano anti-aging agent, 0.8-1.5 parts of anti-freezing agent, 5-15 parts of protective glue solution, 0.2-0.4 part of pH regulator, 0.2-0.4 part of bactericide, 20-50 parts of natural quartz sand and color paste;
the granulation intermediate comprises the following components in parts by mass: 30-80 parts of RO water, 0.1-0.2 part of defoaming agent, 0.5-0.8 part of film-forming assistant, 0.1-0.2 part of wetting agent, 18-36 parts of inorganic protective colloid solution and 0-30 parts of coupling agent modified silica sol;
the emulsion paint comprises the following components in parts by mass: 10-25 parts of RO water, 60-80 parts of emulsion, 0-20 parts of reactive emulsion, 0.1-0.3 part of pH regulator, 0.1-0.3 part of bactericide, 0.1-0.2 part of defoamer, 0.6-2 parts of film-forming assistant, 0.8-1.5 parts of antifreeze, 0-3 parts of bentonite powder material and 0-2 parts of thickener.
2. The water-based 5G granite imitation coating of claim 1, characterized in that the emulsion comprises water-based acrylic resin and/or silicone water-based acrylic resin; the cellulose comprises hydroxyethyl cellulose ether; the wetting dispersant comprises a hydrophobic copolymer sodium salt dispersant.
3. The water-based 5G granite imitation coating of claim 1, characterized in that the defoaming agent comprises modified polysiloxane and/or silicone modified mineral oil; the pigment and filler comprises one or more of heavy calcium, mica powder, talcum powder or rutile type titanium dioxide; the nanometer aging resistant agent comprises nanometer aging resistant slurry.
4. The aqueous 5G granite imitation coating of claim 1 where the film forming aid comprises a dodecyl alcohol ester; the anti-freezing agent comprises propylene glycol; the pH regulator comprises 2-amino-2-methyl-1-propanol.
5. The aqueous 5G granite imitation coating of claim 1 where the biocide includes nitrogen sulfur heterocycles without organic volatiles; the protective glue solution comprises a modified magnesium lithium silicate aqueous solution; the color paste comprises water-based environment-friendly weather-resistant color paste.
6. The aqueous 5G granite imitation coating of claim 1 where the inorganic protective colloid solution includes an aqueous solution of lithium magnesium silicate; the wetting agent comprises a sulfonate wetting agent; the coupling agent modified silica sol comprises titanate coupling agent modified silica sol.
7. The aqueous 5G granite imitation coating of claim 1, characterized in that the thickener comprises a hydrophobically modified alkali soluble emulsion thickener and/or an associative polyurethane thickener; the powder material comprises bentonite material; the reactive emulsion comprises a grafted pure acrylic emulsion.
8. A process for preparing an aqueous 5G granite imitation coating as claimed in any of claims 1 to 7, characterized in that it comprises the following steps:
(1) preparing a base paint: preparing materials according to a formula, adding cellulose into RO water, after uniform dispersion, sequentially adding a wetting dispersant, a pigment filler and a defoaming agent, and then dispersing at a high speed; then reducing the dispersion speed, sequentially adding a film forming aid, an antifreezing agent, an emulsion, a nano anti-aging agent, a protective glue solution, a pH regulator, a bactericide and natural quartz sand, and uniformly stirring at a constant speed to obtain a base paint;
(2) preparation of granulation intermediate: preparing materials according to a formula, sequentially adding a defoaming agent, a film-forming auxiliary agent, a wetting agent, an inorganic protective colloid solution and coupling agent modified silica sol into RO water, and uniformly stirring at a constant speed to obtain a granulation intermediate;
(3) preparing emulsion paint: preparing materials according to a formula, sequentially adding a pH regulator, a bactericide, a defoaming agent, an antifreezing agent and a film-forming auxiliary agent into RO water, stirring, finally adding a thickening agent, increasing the dispersion speed, and stirring at a constant speed to obtain the emulsion paint;
(4) preparing a water-based 5G granite imitation coating: mixing the base paint and the color paste for color matching to form a pigment part, then coating the pigment part by a granulation intermediate, granulating through a screen under pressure, then adding the emulsion paint, mechanically stirring and blending uniformly, and standing for reaction to obtain the water-based 5G granite imitation paint.
9. The preparation method of the water-based 5G granite imitation paint as claimed in claim 1, wherein the dispersion time in step (1) is 10-20min, the high speed dispersion speed is 1000-1200rpm, the time is 20-40min, the reduced dispersion speed is 800-1000rpm, and the uniform stirring time is 8-15 min; the rotation speed of the uniform stirring in the step (2) is 300-500rpm, and the time is 8-15 min.
10. The method for preparing the water-based 5G granite imitation coating as claimed in claim 1, wherein the stirring speed in step (3) is 500-800rpm, the rotation speed after increasing the dispersion speed is 900-1200rpm, and the uniform stirring time is 8-15 min; and (4) standing for reaction for 1-4 h.
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| CN113881302B (en) | 2023-01-06 |
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