CN111808452A - Real stone paint and production process thereof - Google Patents
Real stone paint and production process thereof Download PDFInfo
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- CN111808452A CN111808452A CN202010728660.7A CN202010728660A CN111808452A CN 111808452 A CN111808452 A CN 111808452A CN 202010728660 A CN202010728660 A CN 202010728660A CN 111808452 A CN111808452 A CN 111808452A
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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
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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
- C09D5/08—Anti-corrosive 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
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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
- C09D7/63—Additives non-macromolecular organic
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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
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/192—Polycarboxylic acids; Anhydrides, halides or salts thereof
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with organometallic compounds; with organic compounds containing boron, silicon, selenium or tellurium atoms
- D06M13/51—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond
- D06M13/513—Compounds with at least one carbon-metal or carbon-boron, carbon-silicon, carbon-selenium, or carbon-tellurium bond with at least one carbon-silicon bond
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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Abstract
The application discloses a stone-like paint and a production process thereof, and relates to the field of building exterior wall coatings. The technical key points are as follows: the stone-like paint is prepared from the following raw materials in parts by weight: 110 portions of water and 120 portions of water; 1.5-2 parts of hydroxyethyl cellulose; 0.4-0.6 part of multifunctional amine additive; 2.4-2.6 parts of a preservative; 115 parts of silicone-acrylate emulsion 105; 5-7 parts of a film-forming assistant; 0.2-0.3 part of defoaming agent; 0.8-1.2 parts of thickening agent; 0.8-1.2 parts of rutile titanium dioxide; 740 and 760 parts of colored sand; 8-10 parts of alkali-resistant plant fiber. The stone-like paint has the advantages of improving the alkali corrosion resistance of plant fibers and enhancing the mechanical property.
Description
Technical Field
The application relates to the field of building exterior wall coatings, in particular to a real stone paint and a production process thereof.
Background
Along with the improvement of the decoration requirements of people on internal and external wall coatings, natural stone paint is increasingly popular with people due to the unique appearance and performance, the stone paint which is similar to the appearance of natural stone materials such as natural granite, marble and the like is proposed for a plurality of high-grade houses, courtyards and even high-rise buildings, and the stone paint has the requirements of stronger hardness, water resistance, aging resistance, crack resistance and the like in the aspect of performance.
The invention discloses a light pottery sand stone-like paint and a preparation method thereof in the Chinese patent with the publication number of CN104402301B, wherein the light pottery sand stone-like paint comprises the following raw materials in percentage by weight: 16-21% of silicone-acrylic emulsion, 14-17% of water, 55-63% of ceramic sand, 4-6% of natural rock fragments, 0.3-0.7% of water-retaining agent, 0.1-0.3% of defoaming agent, 0.3-2% of wood fiber and 0.3-0.6% of preservative.
The above prior art solution has the following drawbacks: because the pH of the real stone paint is alkalescent, the pH is generally 8-10, and the wood fiber is organic fiber, after the wood fiber is added into the real stone paint, the wood fiber can be inevitably corroded, thereby reducing the effect of the wood fiber.
Disclosure of Invention
Aiming at the defects existing in the prior art, the first object of the application is to provide a stone-like paint which has the advantage of improving the alkali corrosion resistance of plant fibers.
The second purpose of the application is to provide a production process of the stone-like paint, and the stone-like paint produced by the method has the advantage of improving the alkali corrosion resistance of the plant fibers.
In order to achieve the first object, the present application provides the following technical solutions:
the real stone paint is prepared from the following raw materials in parts by weight:
110 portions of water and 120 portions of water;
1.5-2 parts of hydroxyethyl cellulose;
0.4-0.6 part of multifunctional amine additive;
7-9 parts of ethylene glycol;
2.4-2.6 parts of a preservative;
115 parts of silicone-acrylate emulsion 105;
5-7 parts of a film-forming assistant;
0.2-0.3 part of defoaming agent;
0.8-1.2 parts of thickening agent;
0.8-1.2 parts of rutile titanium dioxide;
740 and 760 parts of colored sand;
8-10 parts of alkali-resistant plant fiber;
the preparation method of the alkali-resistant plant fiber comprises the following steps: drying and crushing the plant fiber, preparing an oxalic acid solution with the volume concentration of 40-50%, adding the plant fiber into the oxalic acid solution to immerse the plant fiber in the oxalic acid solution, adding a fluorine-containing silane coupling agent, reacting for 30-40min, filtering, washing with water, and drying to obtain the alkali-resistant plant fiber.
By adopting the technical scheme, the plant fiber is modified by oxalic acid, the acidic oxygen-containing functional groups are added on the surface of the plant fiber, and the oxalic acid is weak acid, so that the corrosion to the plant fiber can be reduced, and the influence on the mechanical property of the plant fiber is reduced. The fluorine-containing silane coupling agent and hydroxyl on the surface of the plant fiber are subjected to a grafting reaction, so that the surface of the plant fiber contains a certain fluorine-containing functional group, and the alkali corrosion resistance of the plant fiber is improved; on the other hand, the plant fiber forms a three-dimensional network structure in the paint film, and the crack resistance of the stone-like paint is improved.
The present application may be further configured in a preferred example to: the weight ratio of the oxalic acid solution to the plant fiber to the fluorine-containing silane coupling agent is (80-100): (12-16): (1-1.5).
By adopting the technical scheme, in the proportioning range, the plant fiber can be fully contacted with the oxalic acid solution and the fluorine-containing silane coupling agent, the grafting reaction is favorably carried out, and the waste of raw materials can be reduced.
The present application may be further configured in a preferred example to: the fluorine-containing silane coupling agent is any one selected from (3,3, 3-trifluoropropyl) methyldiethoxysilane, (3,3, 3-trifluoropropyl) trimethoxysilane and (3,3, 3-trifluoropropyl) triethoxysilane.
By adopting the technical scheme, one end of the fluorine-containing silane coupling agent can be hydrolyzed to form silanol which is subjected to grafting reaction with plant fibers, and the other end of the fluorine-containing silane coupling agent contains three fluorine atoms, so that the alkali corrosion resistance is good.
The present application may be further configured in a preferred example to: the plant fiber is selected from any one of straw fiber, wheat straw fiber and reed fiber.
By adopting the technical scheme, the plant fiber has low lignin content, high cellulose content, high strength and toughness and good alkali corrosion resistance after treatment; the fiber has wide source, low price and low cost.
The present application may be further configured in a preferred example to: the length of the plant fiber is 1-1.5mm, and the diameter is 10-20 μm.
By adopting the technical scheme, the length and the diameter of the plant fiber are controlled, and after the plant fiber is applied to the stone-like paint, the crack resistance and the mechanical property of the stone-like paint can be improved.
The present application may be further configured in a preferred example to: the plant fiber is also subjected to modification treatment after being dried: mixing and stirring the dried plant fiber, 1-1.5 parts of carboxylic acid containing benzene rings, 0.3-0.4 part of thionyl chloride and 70-80 parts of ethanol uniformly, reacting for 20-30min, filtering, washing and drying to obtain the modified alkali-resistant plant fiber.
By adopting the technical scheme, after the plant fiber is subjected to alkali-resistant treatment, part of fluorine-containing silane coupling agent is grafted on the surface of the plant fiber, but the compatibility of the plant fiber and the real stone paint needs to be improved. After the plant fiber is modified, the plant fiber and carboxylic acid containing benzene ring are subjected to esterification reaction, so that surface groups are increased, the dispersibility of the plant fiber is enhanced, and the crack resistance of the stone-like paint is improved. Thionyl chloride is used as a catalyst and ethanol is used as a solvent of carboxylic acid containing a benzene ring.
The present application may be further configured in a preferred example to: the carboxylic acid containing benzene ring is selected from any one of benzoic acid and phenylacetic acid.
By adopting the technical scheme, on one hand, the carboxylic acid is easy to generate esterification reaction with the plant fiber, and on the other hand, the grafted benzene ring can also improve the temperature resistance of the plant fiber.
In order to achieve the first object, the present application provides the following technical solutions:
a process for producing a stone-like paint as defined in the first aim, comprising the steps of:
step one, adding hydroxyethyl cellulose into water, uniformly dispersing, adding a multifunctional amine auxiliary agent, ethylene glycol, a preservative, a silicone-acrylate emulsion, a film-forming auxiliary agent, a defoaming agent and a thickening agent, and uniformly dispersing to obtain a mixture;
and step two, adding the colored sand and the rutile titanium dioxide into the mixture in a stirring state, uniformly stirring, adding the alkali-resistant plant fiber, and uniformly stirring to obtain the stone-like paint.
By adopting the technical scheme, after uniformly stirring the hydroxyethyl cellulose, the multifunctional amine assistant, the preservative, the silicone-acrylate emulsion, the film-forming assistant, the defoaming agent and the thickening agent, a viscous fluid can be formed, the color sand can form independent color points, and the film-forming assistant and the silicone-acrylate emulsion can be cured into a film in a short time; the alkali-resistant plant fibers form a three-dimensional network structure in the paint film, so that the crack resistance of the stone-like paint is improved; the alkali-resistant plant fiber has certain alkali corrosion resistance, so that the corrosion of the stone-like paint to the alkali-resistant plant fiber can be reduced in the production, storage and construction processes, and the crack resistance and the mechanical property of the stone-like paint are enhanced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. oxalic acid is adopted to modify the plant fiber, acidic oxygen-containing functional groups are added on the surface of the plant fiber, and the oxalic acid is weak acid, so that the corrosion to the plant fiber can be reduced, and the influence on the mechanical property of the plant fiber is reduced. The fluorine-containing silane coupling agent and hydroxyl on the surface of the plant fiber are subjected to a grafting reaction, so that the surface of the plant fiber contains a certain fluorine-containing functional group, and the alkali corrosion resistance of the plant fiber is improved; on the other hand, the plant fiber forms a three-dimensional network structure in the paint film, and the crack resistance of the stone-like paint is improved.
2. After the plant fiber is modified, the plant fiber and carboxylic acid containing benzene ring are subjected to esterification reaction, so that surface groups are increased, the dispersibility of the plant fiber is enhanced, and the crack resistance of the stone-like paint is improved.
Detailed Description
The present application will be described in detail with reference to examples.
Example 1: the real stone paint is prepared from the raw materials in parts by weight shown in Table 1. Wherein the multifunctional amine assistant is AMP-95, and the chemical name of the multifunctional amine assistant is 2-amino-2-methyl-1-propanol; the preservative is 1, 2-benzisothiazolin-3-one; the film-forming additive is alcohol ester twelve; the defoaming agent is polydimethylsiloxane; the thickening agent is alkali swelling thickening agent ASE-60.
The preparation method of the alkali-resistant plant fiber comprises the following steps: drying and crushing the plant fiber, preparing an oxalic acid solution with the volume concentration of 40%, adding the plant fiber into the oxalic acid solution to immerse the plant fiber in the oxalic acid solution, adding a fluorine-containing silane coupling agent, reacting for 30min, filtering, washing with water, and drying to obtain the alkali-resistant plant fiber.
The plant fiber is bamboo fiber, the length of the plant fiber is 1.8mm, and the diameter of the plant fiber is 25 μm; the weight ratio of the oxalic acid solution to the plant fiber to the fluorine-containing silane coupling agent is 70:10:1, and the fluorine-containing silane coupling agent is (3,3, 3-trifluoropropyl) methyldiethoxysilane.
The production process of the stone-like paint comprises the following steps:
step one, adding hydroxyethyl cellulose into water, uniformly dispersing, adding a multifunctional amine auxiliary agent, ethylene glycol, a preservative, a silicone-acrylate emulsion, a film-forming auxiliary agent, a defoaming agent and a thickening agent, and uniformly dispersing to obtain a mixture;
and step two, adding the colored sand and the rutile titanium dioxide into the mixture in a stirring state, uniformly stirring, adding the alkali-resistant plant fiber, and uniformly stirring to obtain the stone-like paint.
Examples 2 to 3: the real stone paint is different from the real stone paint in example 1 in that the components and the corresponding parts by weight of the raw materials are shown in the table 1.
TABLE 1 Components and parts by weight of the raw materials in examples 1-3
| Components | Example 1 | Example 2 | Example 3 |
| Water (W) | 110 | 119 | 120 |
| Hydroxyethyl cellulose | 1.5 | 1.75 | 2 |
| Multifunctional auxiliary agent | 0.4 | 0.5 | 0.6 |
| Ethylene glycol | 7 | 8 | 9 |
| Preservative | 2.4 | 2.5 | 2.6 |
| Silicone-acrylic emulsion | 105 | 110 | 115 |
| Film forming aid | 5 | 6 | 7 |
| Defoaming agent | 0.2 | 0.25 | 0.3 |
| Thickening agent | 0.8 | 1 | 1.2 |
| Rutile titanium dioxide | 0.8 | 1 | 1.2 |
| Color sand | 740 | 750 | 760 |
| Alkali-resistant plant fiber | 8 | 9 | 10 |
Example 4: a stone-like paint, which is different from example 1 in that the plant fiber is straw fiber.
Example 5: the difference between the real stone paint and the real stone paint in the embodiment 4 is that the preparation method of the alkali-resistant plant fiber comprises the following steps: drying and crushing the plant fiber, preparing an oxalic acid solution with the volume concentration of 50%, adding the plant fiber into the oxalic acid solution to immerse the plant fiber in the oxalic acid solution, adding a fluorine-containing silane coupling agent, reacting for 40min, filtering, washing with water, and drying to obtain the alkali-resistant plant fiber.
Example 6: the stone-like paint is different from the paint in the embodiment 4 in that the weight ratio of the oxalic acid solution to the plant fiber to the fluorine-containing silane coupling agent is 80:12: 1.
Example 7: the stone-like paint is different from the paint in the embodiment 4 in that the weight ratio of the oxalic acid solution to the plant fiber to the fluorine-containing silane coupling agent is 100:16: 1.5.
Example 8: a real stone paint was different from example 4 in that the fluorine-containing silane coupling agent was (3,3, 3-trifluoropropyl) trimethoxysilane.
Example 9: a real stone paint was different from example 4 in that the fluorine-containing silane coupling agent was (3,3, 3-trifluoropropyl) triethoxysilane.
Example 10: a stone-like paint, which is different from that in example 4 in that the plant fiber is wheat straw fiber, and the raw material of the wheat straw fiber is the straw part of wheat straw.
Example 11: a real mineral varnish is different from the embodiment 4 in that plant fibers are reed fibers, and the raw material of the reed fibers is straw parts of reeds.
Example 12: a real stone paint, which is different from example 4 in that the length of the plant fiber is 1mm and the diameter is 10 μm.
Example 13: a real stone paint, which is different from example 4 in that the length of the plant fiber is 1.5mm and the diameter is 20 μm.
Example 14: a real stone paint, which is different from example 4 in that the length of the plant fiber is 0.8mm and the diameter is 10 μm.
Example 15: a real stone paint, which is different from the real stone paint in example 4 in that the plant fiber is also modified after being dried: and mixing and stirring the dried plant fiber, 1 part of carboxylic acid containing benzene rings, 0.3 part of thionyl chloride and 70 parts of ethanol uniformly, reacting for 20min, filtering, washing with water, and drying to obtain the modified alkali-resistant plant fiber, wherein the carboxylic acid containing the benzene rings is benzoic acid.
Example 16: a real stone paint, which is different from the real stone paint in example 4 in that the plant fiber is also modified after being dried: and mixing and stirring the dried plant fiber, 1.5 parts of carboxylic acid containing benzene rings, 0.4 part of thionyl chloride and 80 parts of ethanol uniformly, reacting for 30min, filtering, washing with water, and drying to obtain the modified alkali-resistant plant fiber, wherein the carboxylic acid containing the benzene rings is benzoic acid.
Example 17: a real stone paint which differs from example 15 in that the carboxylic acid containing a benzene ring is phenylacetic acid.
Example 18: a real stone paint, different from example 1 in that the plant fiber is straw fiber, the length of the plant fiber is 1mm, and the diameter is 10 μm; the weight ratio of the oxalic acid solution to the plant fiber to the fluorine-containing silane coupling agent is 80:12: 1. The plant fiber is also subjected to modification treatment after being dried: and mixing and stirring the dried plant fiber, 1 part of carboxylic acid containing benzene rings, 0.3 part of thionyl chloride and 70 parts of ethanol uniformly, reacting for 20min, filtering, washing with water, and drying to obtain the modified alkali-resistant plant fiber, wherein the carboxylic acid containing the benzene rings is benzoic acid.
Comparative example 1: the stone-like paint is prepared by adopting the formula and the method of the embodiment 1 in the Chinese invention patent with the publication number of CN 104402301B.
Comparative example 2: a real stone paint is different from the real stone paint in example 4 in that alkali-resistant plant fibers are replaced by straw fibers which are not modified by oxalic acid and fluorine-containing silane coupling agents.
Comparative example 3: a real stone paint is different from the real stone paint in the embodiment 4 in that in the preparation method of the alkali-resistant plant fiber, an oxalic acid solution with the volume concentration of 30 percent is prepared.
Comparative example 4: a real stone paint is different from the real stone paint in the embodiment 4 in that in the preparation method of the alkali-resistant plant fiber, an oxalic acid solution with the volume concentration of 60 percent is prepared.
Performance test method: the crack resistance of the real stone paint of the examples 1 to 18 and the comparative examples 1 to 4 is detected according to the method in the JG/T24-2018 synthetic resin emulsion sand wall-shaped building coating, namely after the real stone paint is cured for 3 hours, 24 hours and 72 hours, the total area of cracks is observed and measured by a magnifying glass; the real stone paints of examples 1 to 18 and comparative examples 1 to 4 were tested for flexibility according to the method in the GBT1748-1979 putty film flexibility assay, and the total area of cracks was observed and determined with a magnifying glass for a sample where cracks were generated.
TABLE 2 test results of crack resistance of real stone paints of examples 1 to 18 and comparative examples 1 to 4
TABLE 3 flexibility test results of the real stone paints of examples 1 to 18 and comparative examples 1 to 4
Test results and analysis: as can be seen by combining examples 1-18 and comparative examples 1-4 with Table 2, the real stone paints of examples 1-18 did not crack after 3h of curing, but comparative examples 2-4 all produced cracks, which indicates that the straw fibers were not modified with oxalic acid and a fluorine-containing silane coupling agent, and were poor in alkali corrosion resistance and compatibility with the real stone paints, thereby causing the real stone paints to crack easily.
Referring to the data of the total crack area of 24h, in example 4, compared with example 1, the total crack area is reduced by 10mm after the bamboo fiber is replaced by the straw fiber2Example 10 replacement of bamboo fiber with wheat straw fiber reduced the total area of cracks by 9.3mm2Example 11 when the bamboo fiber was replaced with reed fiber, the total crack area was reduced by 8.2mm2The method proves that the straw fiber with low lignin content and high cellulose content has high strength and toughness, and has good alkali corrosion resistance and crack resistance after treatment.
Example 6 the total crack area was reduced by 3mm by adjusting the weight ratio of oxalic acid solution, plant fiber and fluorine-containing silane coupling agent2To carry outExample 7 is still a 3.2mm reduction2In the range of the mixture ratio, the plant fiber can be fully contacted with the oxalic acid solution and the fluorine-containing silane coupling agent, so that the grafting reaction is favorably carried out;
according to the data of examples 1 and 12 to 14, it is understood that the total area of cracks is reduced when the length of the plant fiber is 1 to 1.5mm and the diameter is 10 to 20 μm, and the total area of cracks is increased when the length and the diameter of the plant fiber are not within the range, which indicates that the crack resistance of the stone-like paint can be improved by controlling the length and the diameter of the plant fiber.
Example 15 the total area of cracks was reduced by 7.9mm compared to example 4 after modification of alkali-resistant plant fibres2The method proves that the plant fiber is subjected to esterification reaction with carboxylic acid containing benzene rings after modification treatment, so that surface groups are increased, the dispersibility of the plant fiber is enhanced, and the crack resistance of the stone-like paint is improved.
Example 18 as a preferred example, the total area of cracks is reduced by 30 compared with example 4, which is greater than the sum of the reduction values of examples 4, 6, 12, and 15, which indicates that the plant fiber is modified by oxalic acid and the fluorine-containing silane coupling agent, and then is subjected to graft modification treatment, so as to achieve synergistic effect, and simultaneously improve the alkali corrosion resistance of the plant fiber and the compatibility of the plant fiber and the real stone paint, thereby improving the crack resistance of the real stone paint.
As can be seen by combining examples 1-18 and comparative examples 1-4 with Table 3, the real stone paint of examples 1-18 has better flexibility, but the comparative examples 1-4 have unqualified flexibility, which indicates that the vegetable fiber is modified by oxalic acid and fluorine-containing silane coupling agent to improve the alkali corrosion resistance, thereby enhancing the flexibility of the real stone paint.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The stone-like paint is characterized by being prepared from the following raw materials in parts by weight:
110 portions of water and 120 portions of water;
1.5-2 parts of hydroxyethyl cellulose;
0.4-0.6 part of multifunctional amine additive;
7-9 parts of ethylene glycol;
2.4-2.6 parts of a preservative;
115 parts of silicone-acrylate emulsion 105;
5-7 parts of a film-forming assistant;
0.2-0.3 part of defoaming agent;
0.8-1.2 parts of thickening agent;
0.8-1.2 parts of rutile titanium dioxide;
740 and 760 parts of colored sand;
8-10 parts of alkali-resistant plant fiber;
the preparation method of the alkali-resistant plant fiber comprises the following steps: drying and crushing the plant fiber, preparing an oxalic acid solution with the volume concentration of 40-50%, adding the plant fiber into the oxalic acid solution to immerse the plant fiber in the oxalic acid solution, adding a fluorine-containing silane coupling agent, reacting for 30-40min, filtering, washing with water, and drying to obtain the alkali-resistant plant fiber.
2. The stone-like paint as claimed in claim 1, wherein the weight ratio of oxalic acid solution, plant fiber and fluorine-containing silane coupling agent is (80-100): (12-16): (1-1.5).
3. The stone-like paint as claimed in claim 1, wherein said fluorine-containing silane coupling agent is selected from any one of (3,3, 3-trifluoropropyl) methyldiethoxysilane, (3,3, 3-trifluoropropyl) trimethoxysilane, and (3,3, 3-trifluoropropyl) triethoxysilane.
4. The stone-like paint as claimed in claim 1, wherein the plant fiber is selected from any one of straw fiber, wheat straw fiber and reed fiber.
5. The stone-like paint as claimed in claim 1, wherein the plant fiber has a length of 1-1.5mm and a diameter of 10-20 μm.
6. The stone-like paint as claimed in claim 1, wherein said plant fiber is further modified after drying: mixing and stirring the dried plant fiber, 1-1.5 parts of carboxylic acid containing benzene rings, 0.3-0.4 part of thionyl chloride and 70-80 parts of ethanol uniformly, reacting for 20-30min, filtering, washing and drying to obtain the modified alkali-resistant plant fiber.
7. The stone-like paint as claimed in claim 1, wherein said carboxylic acid containing benzene ring is selected from any one of benzoic acid and phenylacetic acid.
8. A process for producing a stone-like paint as claimed in any one of claims 1 to 7, comprising the steps of:
step one, adding hydroxyethyl cellulose into water, uniformly dispersing, adding a multifunctional amine auxiliary agent, ethylene glycol, a preservative, a silicone-acrylate emulsion, a film-forming auxiliary agent, a defoaming agent and a thickening agent, and uniformly dispersing to obtain a mixture;
and step two, adding the colored sand and the rutile titanium dioxide into the mixture in a stirring state, uniformly stirring, adding the alkali-resistant plant fiber, and uniformly stirring to obtain the stone-like paint.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6342386B1 (en) * | 1996-10-29 | 2002-01-29 | Warren Paul Powers | Methods for removing undesired growth from a surface |
| CN109294261A (en) * | 2018-08-15 | 2019-02-01 | 厦门壳氏新材料科技有限公司 | Plant fiber mixed powder, and preparation method thereof and plant fiber synthetic resin article |
| CN110436831A (en) * | 2019-06-26 | 2019-11-12 | 河北晨阳工贸集团有限公司 | A kind of lacquer and preparation method thereof |
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2020
- 2020-07-28 CN CN202010728660.7A patent/CN111808452B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6342386B1 (en) * | 1996-10-29 | 2002-01-29 | Warren Paul Powers | Methods for removing undesired growth from a surface |
| CN109294261A (en) * | 2018-08-15 | 2019-02-01 | 厦门壳氏新材料科技有限公司 | Plant fiber mixed powder, and preparation method thereof and plant fiber synthetic resin article |
| CN110436831A (en) * | 2019-06-26 | 2019-11-12 | 河北晨阳工贸集团有限公司 | A kind of lacquer and preparation method thereof |
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