CN111635650A - Quick-drying type real stone paint and preparation method thereof - Google Patents
Quick-drying type real stone paint and preparation method thereof Download PDFInfo
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- CN111635650A CN111635650A CN202010499902.XA CN202010499902A CN111635650A CN 111635650 A CN111635650 A CN 111635650A CN 202010499902 A CN202010499902 A CN 202010499902A CN 111635650 A CN111635650 A CN 111635650A
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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
- 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
Abstract
The invention provides a quick-drying type real stone paint, which comprises quick-drying bi-component emulsion and aggregate, wherein the quick-drying bi-component emulsion comprises the components in a volume ratio of 3-4: 1, the component A and the component B are used in a way that 20-30 parts by weight of aggregate is mixed in every 10 parts by weight of the component A; the volume ratio of the component A is 1: (4-5) a mixed emulsion of an acrylic copolymer and an ethylene-vinyl acetate copolymer emulsion, wherein the acrylic copolymer is prepared by copolymerizing the following raw materials: water-soluble polyvinyl alcohol, potassium persulfate, distilled water, methacrylic acid, styrene, methyl methacrylate, isooctyl acrylate, isooctyl methacrylate, acetoacetoxy ethyl methacrylate and ethylene-vinyl acetate copolymer; the component B is a zinc tetraammine complex. The paint can be divided into two components to be stored separately, has long storage period, is stable and is not easy to deteriorate, the two components are mixed together when the paint is used, and the formed paint film has high drying speed, good toughness, energy conservation and high efficiency.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a quick-drying type stone-like paint and a preparation method thereof.
Background
The decorative effect of the stone-like paint is very close to that of marble and granite, the vivid and lifelike natural color gives people a harmonious, solemn and elegant aesthetic feeling, and the stone-like paint is suitable for indoor and outdoor decoration of buildings. Most of the emulsions used in the existing stone-like paint are pure acrylic or styrene-acrylic emulsions, and the pure acrylic emulsion has high cost and large addition amount. Chinese patent application No. 201711494431.8 (application publication No. CN 108264805A) discloses a quick-drying soft porcelain stone paint and a preparation method thereof, wherein the quick-drying soft porcelain stone paint comprises the following raw materials: 15-25 parts of quick-drying acrylic emulsion, 5-15 parts of potassium-based water glass, 30-50 parts of 120-mesh quartz sand, 20-30 parts of 40-80-mesh quartz sand, 1-5 parts of silane coupling agent, 0.05-0.3 part of defoaming agent and 0.1-1 part of quaternary ammonium salt. The technical scheme has the advantages that the soft porcelain real stone paste has quick drying capacity when being prepared into a finished product, is nearly dry in 3-10min at the temperature of 70-100 ℃, has good flexibility, and can wind a cylinder with the diameter of 5cm without cracking. However, the potassium-based water glass and the quick-drying acrylic emulsion can slowly react under the normal temperature condition, so that the storage stability of the quick-drying soft porcelain natural stone paint is influenced, although the potassium-based water glass and the stable paint can be dispersed to a certain extent by adding the quaternary ammonium salt, the long-term storage stability is poor, the emulsion is easy to gel, and the finally formed paint film is slow in drying speed and poor in quality.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a quick-drying type real stone paint and a preparation method thereof.
The technical scheme of the invention is realized as follows:
a quick-drying real stone paint comprises a quick-drying bi-component emulsion and aggregate, wherein the quick-drying bi-component emulsion comprises a mixture of a main component and a secondary component in a volume ratio of 3-4: 1, the component A and the component B are used by matching 20-30 parts by weight of aggregate with every 10 parts by weight of the component A, and the aggregate is 120-140-mesh quartz sand and 40-80-mesh quartz sand according to the mass ratio (2-3): 1, mixing;
the volume ratio of the component A is 1: (4-5) a mixed emulsion of an acrylic copolymer and an ethylene-vinyl acetate copolymer emulsion, wherein the acrylic copolymer is prepared by copolymerizing the following raw materials in parts by weight: 1-3 parts of water-soluble polyvinyl alcohol, 0.1-0.33 part of potassium persulfate, 10.5-21 parts of distilled water, 0.8-2.8 parts of methacrylic acid, 0.1-0.5 part of styrene, 1-3 parts of methyl methacrylate, 2-5 parts of isooctyl acrylate, 0.5-4 parts of isooctyl methacrylate, 0.1-0.5 part of acetoacetoxy ethyl methacrylate and 1.8-3.5 parts of ethylene-vinyl acetate copolymer;
the component B is a zinc tetrammine complex which consists of the following raw materials in parts by weight: 2-4 parts of zinc acetate, 1-2 parts of ammonia water, 0.1-1 part of water-soluble polyvinyl alcohol and 60-100 parts of distilled water, wherein the concentration of the ammonia water is 25%.
Preferably, the aggregate is quartz sand modified by a silane coupling agent, and the silane coupling agent is at least one of 3-aminopropyltriethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
Preferably, the aggregate is further added with modified hollow glass beads, the modified hollow glass beads are hollow glass beads subjected to modification treatment by a silane coupling agent, and the adding mass of the modified hollow glass beads is 5% -10% of that of the aggregate.
More preferably, the ethylene-vinyl acetate copolymer is 20-25% of vinyl acetate by mass, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
The preparation method of the quick-drying type real stone paint comprises the following preparation steps:
the method comprises the following steps: respectively preparing a component A and a component B and pretreating quartz sand:
the preparation method of the component A comprises the following steps: adding 1-3 parts of water-soluble polyvinyl alcohol and 0.01-0.05 part of potassium persulfate into 10-20 parts of distilled water, stirring at 80-85 ℃ for at least 10min to prepare a first solution, adding 0.02-0.08 part of potassium persulfate into 0.5-1 part of distilled water, uniformly stirring to prepare a second solution, then adding 0.3-0.8 part of methacrylic acid and 0.1-0.5 part of styrene into the first solution, and carrying out polymerization reaction for at least 30min under stirring to prepare a styrene-acrylic copolymer core emulsion; adding 0.5-2 parts of methacrylic acid, 1-3 parts of methyl methacrylate, 2-5 parts of isooctyl acrylate, 0.5-4 parts of isooctyl methacrylate, 0.1-0.5 part of acetoacetoxy ethyl methacrylate, 1.8-3.5 parts of ethylene-vinyl acetate copolymer and 0.1-0.2 part of potassium persulfate into the product obtained in the previous step, continuing polymerization reaction at 85-88 ℃ for at least 30min under stirring to obtain a core-shell acrylic acid ionomer emulsion, namely an acrylic copolymer, and pre-irradiating the ethylene-vinyl acetate copolymer by using beta rays in an air atmosphere by using an electron accelerator before adding in the second step, wherein the pre-irradiation dose is 20-30kGy, and the pre-irradiation time is 5-15 min; then adding ethylene-vinyl acetate copolymer emulsion into the acrylic copolymer;
isooctyl acrylate and isooctyl methacrylate are soft monomers, and weather resistance and flexibility can be improved; the acetoacetoxy ethyl methacrylate is a functional crosslinking monomer, a crosslinking point is introduced, the adhesive force is improved, and the ratio of the polymerized monomer to the functional monomer is proper; the ethylene-vinyl acetate copolymer can generate macromolecular peroxide after pre-irradiation, can be used as an initiator in polymerization reaction, so that the macromolecular peroxide is grafted with partial monomers in the acrylic ester, and the grafted product can obviously improve the toughness, elasticity and impact resistance of the emulsion after curing; the ethylene-vinyl acetate copolymer emulsion has the advantages that due to the introduction of ethylene molecular chains into polyvinyl acetate molecules, acetyl groups generate discontinuity, the rotational freedom degree of the high molecular chains is increased, the space obstruction is small, the high molecular main chains become soft, and the plasticizer migration cannot occur, so that the adhesive property is provided, the permanent flexibility is realized, the permanent softness of products is ensured, the ethylene-vinyl acetate copolymer has better acid and alkali resistance and ultraviolet aging resistance, and the ethylene-vinyl acetate copolymer is also an elastomer material after film forming. The ethylene-vinyl acetate copolymer and the acrylic copolymer have toughening effect; the ethylene-vinyl acetate copolymer and the ethylene-vinyl acetate emulsion are both ethylene-vinyl acetate copolymers with the mass percent of vinyl acetate of 20-25 percent, and different names are adopted only for convenient distinction;
the preparation method of the component B comprises the following steps: mixing 2-4 parts of zinc acetate, 1-2 parts of ammonia water, 0.1-1 part of water-soluble polyvinyl alcohol and 60-100 parts of distilled water, and uniformly stirring, wherein the concentration of the ammonia water is 25%;
the component B is stirred evenly to generate a zinc tetraammine complex [ Zn (NH) which can exist stably for a long time3)4]2+Overcomes the defects that the zinc ammonia solution prepared by zinc oxide in the prior art is easy to have powdery bottom deposition and coking in the reaction process and causes unstable and uneven reaction in the emulsion preparation processPoor storage stability at the later stage;
the quartz sand pretreatment method comprises the following steps: removing impurities from quartz sand, washing with water, drying, adding into ethanol solution containing 5-10 wt% water-soluble polyvinyl alcohol, stirring at 80-85 deg.C for at least 2 hr, and drying;
step two: uniformly mixing the two pretreated quartz sands, adding the two pretreated quartz sands into the component A, continuously stirring at the rotating speed of 1500-800 rpm until the two quartz sands are uniform, barreling the mixture for storage, and separately barreling the component B for later use, wherein when the quartz sands are used, the component B is dropwise added into a mixed system of the aggregate and the component A and continuously stirred at the rotating speed of 500-800rpm until the two quartz sands are uniform; the component A and the component B are aqueous dispersions, aggregate and the component A are mixed and then uniformly stirred to prepare a uniformly dispersed mixed system, the component B is used as the other system, the two systems are separately stored and are prepared at present when in use, and when the mixture is heated to 60-65 ℃ after mixing, the acrylic copolymer and the ethylene-vinyl acetate copolymer emulsion in the component A and the zinc tetraammine complex in the component B can generate effective and rapid crosslinking reaction to generate zinc ion crosslinking core-shell acrylic acid ionomer emulsion, so that a flexible and continuous paint film is formed. When the stone paint is used for manufacturing a finished product of the soft porcelain stone paste, the real drying can be approached after 10min at the temperature of 60-65 ℃.
Preferably, in the step one, after quartz sand is pretreated, the pretreated quartz sand is placed into a ball mill, a silane coupling agent is added into the ball mill at the temperature of 80-85 ℃, the adding mass of the silane coupling agent is 0.5% -1% of that of the quartz sand, and after the ball mill is finished, the temperature is naturally reduced to room temperature, and then the modified quartz sand powder is classified. The quartz sand generates heat due to friction during ball milling, the ball milling speed is controlled to ensure that the reaction temperature is between 80 and 85 ℃, and further heating is not needed; after the ball milling is finished and the temperature is slowly reduced, the silane coupling agent is uniformly coated on the surface of the quartz sand. The acrylic copolymer formed by the component A can generate a crosslinking reaction with a silane coupling agent, and the quartz sand surface can be crosslinked with the component A after being modified by the silane coupling agent, so that the aggregate can be uniformly dispersed in the component A and can be stably stored for a long time without sedimentation, and the finally formed stone-like paint has very low sand-dropping rate.
Further preferably, in the step one, the method further comprises a step of modifying the hollow glass beads, the addition of the hollow glass beads can enable the stone-like paint to have a certain heat preservation function, the purpose of modification is the same as that of quartz sand modification, and the method is mainly used for crosslinking the component A with the component A, so that the stone-like paint is convenient to disperse and not easy to settle, and is long-term, stable and preserved, and the specific operations are as follows: washing and drying the hollow glass beads, putting the washed and dried hollow glass beads into an ethanol solution containing 5-10 wt% of water-soluble polyvinyl alcohol, continuously stirring for at least 2 hours at 80-85 ℃, and drying; immersing the mixture into an ethanol solution containing a silane coupling agent with the volume concentration of 5-10%, continuously stirring for at least 2h at the temperature of 80-85 ℃, and drying; in the second step, the hollow glass beads after modification treatment and two kinds of quartz sand are uniformly mixed and then added into the component A.
More preferably, the silane coupling agent is at least one of 3-aminopropyltriethoxysilane and gamma-methacryloxypropyltrimethoxysilane, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
Compared with the prior art, the method has the following beneficial effects:
1. the polymerization temperature adopted during the production of the component A is relatively low, and the reflux and volatilization of monomers cannot be caused, so that the production process is relatively green and environment-friendly, and has little harm to the environment; the component B is uniform and can stably exist for a long time; the component A and the aggregate are mixed to form a uniform and stable mixing system which can be stored for a long time, and the component A and the component B are separately stored and mixed for use, so that the quality guarantee period is long;
2. the drying speed is high, the drying can be realized within a few minutes after the heating is carried out to 60-65 ℃, and the actual drying can be approached after the real stone paint is used for manufacturing the finished soft porcelain real stone paste at 60-65 ℃ for about 10 min;
3. the paint film has high adhesive force, does not fall sand after long-term use, has good flexibility, and can wind a cylinder with the diameter of 1-2cm without cracking.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A quick-drying real stone paint comprises a quick-drying bi-component emulsion and aggregate, wherein the quick-drying bi-component emulsion comprises a mixture of a main component and a secondary component in a volume ratio of 4: 1, every 10 parts by weight of the component A is matched with 25 parts by weight of aggregate, and the aggregate is 120-140-mesh quartz sand and 40-80-mesh quartz sand according to the mass ratio of 2: 1, mixing;
the volume ratio of the component A is 1: 5, the acrylic copolymer is copolymerized by the following raw materials in parts by weight: 2 parts of water-soluble polyvinyl alcohol, 0.13 part of potassium persulfate, 21 parts of distilled water, 1.8 parts of methacrylic acid, 0.1 part of styrene, 3 parts of methyl methacrylate, 3.5 parts of isooctyl acrylate, 0.5 part of isooctyl methacrylate, 0.5 part of acetoacetoxy ethyl methacrylate and 2.3 parts of ethylene-vinyl acetate copolymer;
the component B is a zinc tetrammine complex which consists of the following raw materials in parts by weight: 2 parts of zinc acetate, 2 parts of ammonia water, 0.6 part of water-soluble polyvinyl alcohol and 60 parts of distilled water, wherein the concentration of the ammonia water is 25%;
the ethylene-vinyl acetate copolymer and the ethylene-vinyl acetate copolymer emulsion are both ethylene-vinyl acetate copolymer with the mass percentage of vinyl acetate of 22 percent, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
The quick-drying type real stone paint is prepared according to the following operation steps:
the method comprises the following steps: respectively preparing a component A and a component B and pretreating quartz sand:
adding 2 parts of water-soluble polyvinyl alcohol and 0.01 part of potassium persulfate into 20 parts of distilled water, stirring at 80 ℃ for 10min to prepare a first solution, adding 0.02 part of potassium persulfate into 1 part of distilled water, uniformly stirring to prepare a second solution, adding the second solution, 0.8 part of methacrylic acid and 0.1 part of styrene into the first solution, and carrying out polymerization reaction for 30min under stirring to prepare a styrene-acrylic copolymer nuclear emulsion; adding 1 part of methacrylic acid, 3 parts of methyl methacrylate, 3.5 parts of isooctyl acrylate, 0.5 part of isooctyl methacrylate, 0.5 part of acetoacetoxy ethyl methacrylate, 2.3 parts of ethylene-vinyl acetate copolymer and 0.1 part of potassium persulfate into the product obtained in the previous step, and continuing to perform polymerization reaction for 30min at 85 ℃ under stirring to obtain a core-shell acrylic acid ionomer emulsion, wherein the ethylene-vinyl acetate copolymer is pre-irradiated by beta rays in an air atmosphere by using an electron accelerator before the addition in the second step, the pre-irradiation dose is 20kGy, and the pre-irradiation time is 15 min; then adding 5 times of ethylene-vinyl acetate copolymer emulsion into the acrylic copolymer;
the preparation method of the component B comprises the following steps: mixing 2 parts of zinc acetate, 2 parts of ammonia water, 0.6 part of water-soluble polyvinyl alcohol and 60 parts of distilled water, and uniformly stirring;
the quartz sand pretreatment method comprises the following steps: removing impurities from quartz sand, washing with water, drying, putting into an ethanol solution containing 5 wt% of water-soluble polyvinyl alcohol, continuously stirring for 2h at 85 ℃, and drying for later use;
step two: and uniformly mixing the two pretreated quartz sands, adding the two pretreated quartz sands into the component A, continuously stirring the mixture at the rotating speed of 2000rpm until the mixture is uniform, then dropwise adding the component B, and continuously stirring the mixture at the rotating speed of 600rpm until the mixture is uniform.
Example 2
A quick-drying real stone paint comprises a quick-drying two-component emulsion and aggregate, wherein the quick-drying two-component emulsion comprises a mixture of a main component and a secondary component in a volume ratio of 3.5: 1, every 10 parts by weight of the component A is matched with 20 parts by weight of aggregate, and the aggregate is 120-140-mesh quartz sand and 40-80-mesh quartz sand according to the mass ratio of 3: 1, mixing;
the volume ratio of the component A is 1: 4.5 mixed emulsion of acrylic copolymer and ethylene-vinyl acetate copolymer emulsion, wherein the acrylic copolymer is copolymerized by the following raw materials in parts by weight: 3 parts of water-soluble polyvinyl alcohol, 0.23 part of potassium persulfate, 15 parts of distilled water, 0.8 part of methacrylic acid, 0.5 part of styrene, 2 parts of methyl methacrylate, 2 parts of isooctyl acrylate, 4 parts of isooctyl methacrylate, 0.3 part of acetoacetoxy ethyl methacrylate and 1.8 parts of ethylene-vinyl acetate copolymer;
the component B is a zinc tetrammine complex which consists of the following raw materials in parts by weight: 4 parts of zinc acetate, 1.5 parts of ammonia water, 0.1 part of water-soluble polyvinyl alcohol and 100 parts of distilled water, wherein the concentration of the ammonia water is 25%;
the ethylene-vinyl acetate copolymer and the ethylene-vinyl acetate copolymer emulsion are both ethylene-vinyl acetate copolymer with the mass percentage of vinyl acetate of 24 percent, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
The quick-drying type real stone paint is prepared according to the following operation steps:
the method comprises the following steps: respectively preparing a component A and a component B and pretreating quartz sand:
adding 3 parts of water-soluble polyvinyl alcohol and 0.05 part of potassium persulfate into 14.5 parts of distilled water, stirring at 82 ℃ for 20min to prepare a first solution, adding 0.03 part of potassium persulfate into 0.5 part of distilled water, uniformly stirring to prepare a second solution, adding the second solution, 0.3 part of methacrylic acid and 0.5 part of styrene into the first solution, and carrying out polymerization reaction for 40min under stirring to prepare a styrene-acrylic copolymer nuclear emulsion; adding 0.5 part of methacrylic acid, 2 parts of methyl methacrylate, 2 parts of isooctyl acrylate, 4 parts of isooctyl methacrylate, 0.3 part of acetoacetoxy ethyl methacrylate, 1.8 parts of ethylene-vinyl acetate copolymer and 0.15 part of potassium persulfate into the product obtained in the previous step, and continuously carrying out polymerization reaction for 40min at 88 ℃ under stirring to obtain a core-shell acrylic acid ionomer emulsion, wherein the ethylene-vinyl acetate copolymer is pre-irradiated by beta rays in an air atmosphere by using an electron accelerator before being added in the second step, wherein the pre-irradiation dose is 30kGy, and the pre-irradiation time is 5 min; then adding ethylene-vinyl acetate copolymer emulsion with the volume 4.5 times that of the acrylic copolymer into the acrylic copolymer;
the preparation method of the component B comprises the following steps: mixing 4 parts of zinc acetate, 1.5 parts of ammonia water, 0.1 part of water-soluble polyvinyl alcohol and 100 parts of distilled water, and uniformly stirring;
the quartz sand pretreatment method comprises the following steps: removing impurities from quartz sand, washing with water, drying, adding into ethanol solution containing 10 wt% water-soluble polyvinyl alcohol, stirring at 80 deg.C for 2 hr, and drying;
step two: and uniformly mixing the two pretreated quartz sands, adding the two pretreated quartz sands into the component A, continuously stirring the mixture at the rotating speed of 1500rpm until the mixture is uniform, then dropwise adding the component B, and continuously stirring the mixture at the rotating speed of 800rpm until the mixture is uniform.
Example 3
A quick-drying real stone paint comprises a quick-drying bi-component emulsion and aggregate, wherein the quick-drying bi-component emulsion comprises a mixture of a main component and a secondary component in a volume ratio of 3: 1, every 10 parts by weight of the component A is matched with 30 parts by weight of aggregate, and the aggregate is 120-140-mesh quartz sand and 40-80-mesh quartz sand according to the mass ratio of 2.5: 1, mixing;
the volume ratio of the component A is 1: 4, the acrylic copolymer is copolymerized by the following raw materials in parts by weight: 2 parts of water-soluble polyvinyl alcohol, 0.25 part of potassium persulfate, 18 parts of distilled water, 1.5 parts of methacrylic acid, 0.3 part of styrene, 2 parts of methyl methacrylate, 3.5 parts of isooctyl acrylate, 2.5 parts of isooctyl methacrylate, 0.3 part of acetoacetoxy ethyl methacrylate and 2.8 parts of ethylene-vinyl acetate copolymer;
the component B is a zinc tetrammine complex which consists of the following raw materials in parts by weight: 3.2 parts of zinc acetate, 1.6 parts of ammonia water, 0.8 part of water-soluble polyvinyl alcohol and 80 parts of distilled water, wherein the concentration of the ammonia water is 25%;
the ethylene-vinyl acetate copolymer and the ethylene-vinyl acetate copolymer emulsion are both ethylene-vinyl acetate copolymer with the mass percentage of vinyl acetate of 25 percent, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
The quick-drying type real stone paint is prepared according to the following operation steps:
the method comprises the following steps: respectively preparing a component A and a component B and pretreating quartz sand:
preparation of component A: adding 2 parts of water-soluble polyvinyl alcohol and 0.03 part of potassium persulfate into 17 parts of distilled water, stirring at 83 ℃ for 20min to prepare a first solution, adding 0.05 part of potassium persulfate into 1 part of distilled water, uniformly stirring to prepare a second solution, adding 0.5 part of methacrylic acid and 0.3 part of styrene into the first solution, and carrying out polymerization reaction for 40min under stirring to prepare a styrene-acrylic copolymer nuclear emulsion; adding 3.2 parts by weight of modified plant fiber grafted with acrylic ester, 1 part of methacrylic acid, 2 parts of methyl methacrylate, 3.5 parts of isooctyl acrylate, 2.5 parts of isooctyl methacrylate, 0.3 part of acetoacetoxy ethyl methacrylate, 2.8 parts of ethylene-vinyl acetate copolymer and 0.17 part of potassium persulfate into the product obtained in the previous step, continuing polymerization reaction for 40min at 86 ℃ under stirring to obtain core-shell acrylic acid ionomer emulsion, and then adding 1.2 parts by weight of nano talcum powder; before the addition of the ethylene-vinyl acetate copolymer in the second step, an electron accelerator is adopted to carry out pre-irradiation by beta rays in the air atmosphere, the pre-irradiation dose is 25kGy, and the pre-irradiation time is 10 min; then adding 3 times of ethylene-vinyl acetate copolymer emulsion into the acrylic copolymer;
the preparation method of the component B comprises the following steps: mixing 4 parts of zinc acetate, 1.5 parts of ammonia water, 0.1 part of water-soluble polyvinyl alcohol and 100 parts of distilled water, and uniformly stirring;
the quartz sand pretreatment method comprises the following steps: removing impurities from quartz sand, washing with water, drying, adding into ethanol solution containing 8 wt% water-soluble polyvinyl alcohol, stirring at 83 deg.C for 2.5h, and drying;
step two: and uniformly mixing the two pretreated quartz sands, adding the two pretreated quartz sands into the component A, continuously stirring the mixture at the rotation speed of 1800rpm until the mixture is uniform, then dropwise adding the component B, and continuously stirring the mixture at the rotation speed of 500rpm until the mixture is uniform.
Example 4
On the basis of the embodiment 3, the surface modification is carried out on the quartz sand by adopting 3-aminopropyltriethoxysilane, and the specific operation of the modification is as follows: after pretreatment of quartz sand, placing the pretreated quartz sand into a ball mill, adding 3-aminopropyltriethoxysilane for ball milling at the temperature of 80 ℃, wherein the adding mass of the 3-aminopropyltriethoxysilane is 1% of the adding mass of the quartz sand, naturally cooling to room temperature after the ball milling is finished, and grading modified quartz sand powder.
Example 5
On the basis of the embodiment 3, the quartz sand is subjected to surface modification by adopting gamma-methacryloxypropyltrimethoxysilane, and the specific operation of the modification is as follows: after quartz sand is pretreated, the quartz sand is placed into a ball mill, gamma-methacryloxypropyltrimethoxysilane is added to carry out ball milling at 85 ℃, the addition mass of the gamma-methacryloxypropyltrimethoxysilane is 0.5 percent of the addition mass of the quartz sand, and after the ball milling is finished, the temperature is naturally reduced to room temperature, and then the modified quartz sand powder is classified.
Example 6
On the basis of the embodiment 3, the quartz sand is subjected to surface modification by adopting gamma-methacryloxypropyltrimethoxysilane, and the specific operation of the modification is as follows: after quartz sand is pretreated, the quartz sand is placed into a ball mill, gamma-methacryloxypropyltrimethoxysilane is added to carry out ball milling at 83 ℃, the addition mass of the gamma-methacryloxypropyltrimethoxysilane is 0.8 percent of that of the quartz sand, and after the ball milling is finished, the temperature is naturally reduced to room temperature, and then the modified quartz sand powder is classified.
Example 7
On the basis of the embodiment 4, modified hollow glass beads are added, the adding mass of the modified hollow glass beads is 5% of that of the aggregate, the modified hollow glass beads and the modified quartz sand are uniformly mixed and then added into the component A, and other technical parameters are the same as those of the embodiment 4. The modification operation of the hollow glass bead comprises the following steps: washing and drying the hollow glass beads, putting the hollow glass beads into an ethanol solution containing 10 wt% of water-soluble polyvinyl alcohol, continuously stirring the mixture for 2 hours at 85 ℃, and drying the mixture; immersing the mixture into an ethanol solution containing a silane coupling agent with the volume concentration of 5%, continuously stirring for 2h at 85 ℃, and drying.
Example 8
On the basis of the embodiment 4, modified hollow glass beads are added, the adding mass of the modified hollow glass beads is 8% of that of the aggregate, the modified hollow glass beads and the modified quartz sand are uniformly mixed and then added into the component A, and other technical parameters are the same as those of the embodiment 4. The modification operation of the hollow glass bead comprises the following steps: washing and drying the hollow glass beads, putting the hollow glass beads into an ethanol solution containing 7 wt% of water-soluble polyvinyl alcohol, continuously stirring for 3 hours at 80 ℃, and drying; immersing the mixture into an ethanol solution containing a silane coupling agent with the volume concentration of 8%, continuously stirring for 3h at the temperature of 80 ℃, and drying.
Example 9
On the basis of the embodiment 4, modified hollow glass beads are added, the adding mass of the modified hollow glass beads is 10% of that of the aggregate, the modified hollow glass beads and the modified quartz sand are uniformly mixed and then added into the component A, and other technical parameters are the same as those of the embodiment 4. The modification operation of the hollow glass bead comprises the following steps: washing and drying the hollow glass beads, putting the washed and dried hollow glass beads into an ethanol solution containing 5 wt% of water-soluble polyvinyl alcohol, continuously stirring the mixture for 2.5 hours at 82 ℃, and drying the mixture; immersing the mixture into an ethanol solution containing 10 volume percent of silane coupling agent, continuously stirring for 2.5h at 82 ℃, and drying.
The real stone paint prepared in the examples 1 to 9 is subjected to performance tests according to related requirements in JG/T24-2018, and the water resistance, alkali resistance, initial cracking resistance, low-temperature and heat storage stability, temperature change resistance of a coating and water absorption capacity of each product meet the requirements, and the performances in drying time, flexibility and bonding strength are particularly excellent, as shown in the following table:
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein. The components or connections not specifically described in the present invention are conventional in the art. The front side, the rear side, the left side and the right side of the present invention are described for convenience of describing the structure thereof, and are not intended to limit the protection scope of the present invention.
Claims (8)
1. The utility model provides a real mineral varnish of quick-drying type which characterized in that: the quick-drying double-component emulsion comprises a quick-drying double-component emulsion and aggregate, wherein the volume ratio of the quick-drying double-component emulsion is 3-4: 1, 20-30 parts of aggregate is matched with 10 parts of the component A, and the aggregate is 120-140-mesh quartz sand and 40-80-mesh quartz sand according to the mass ratio (2-3): 1, mixing;
the component A is prepared from the following components in a volume ratio of 1: (4-5) a mixed emulsion of an acrylic copolymer and an ethylene-vinyl acetate copolymer emulsion, wherein the acrylic copolymer is prepared by copolymerizing the following raw materials in parts by weight: 1-3 parts of water-soluble polyvinyl alcohol, 0.1-0.33 part of potassium persulfate, 10.5-21 parts of distilled water, 0.8-2.8 parts of methacrylic acid, 0.1-0.5 part of styrene, 1-3 parts of methyl methacrylate, 2-5 parts of isooctyl acrylate, 0.5-4 parts of isooctyl methacrylate, 0.1-0.5 part of acetoacetoxy ethyl methacrylate and 1.8-3.5 parts of ethylene-vinyl acetate copolymer;
the component B is a zinc tetrammine complex composed of the following raw materials in parts by weight: 2-4 parts of zinc acetate, 1-2 parts of ammonia water, 0.1-1 part of water-soluble polyvinyl alcohol and 60-100 parts of distilled water, wherein the concentration of the ammonia water is 25%.
2. The quick-drying type real stone paint according to claim 1, characterized in that: the aggregate is quartz sand modified by a silane coupling agent, and the silane coupling agent is at least one of 3-aminopropyltriethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
3. The quick-drying type real stone paint according to claim 1, characterized in that: the aggregate is also added with modified hollow glass beads, the modified hollow glass beads are hollow glass beads modified by a silane coupling agent, and the adding mass of the modified hollow glass beads is 5% -10% of that of the aggregate.
4. The quick-drying type real stone paint according to any one of claims 1 to 3, characterized in that: the ethylene-vinyl acetate copolymer is 20-25% of vinyl acetate by mass percent, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
5. A method for preparing a quick-drying type real stone paint according to claim 1, wherein: the preparation method comprises the following preparation steps:
the method comprises the following steps: respectively preparing a component A and a component B and pretreating quartz sand:
the preparation method of the component A comprises the following steps: adding 1-3 parts of water-soluble polyvinyl alcohol and 0.01-0.05 part of potassium persulfate into 10-20 parts of distilled water, stirring at 80-85 ℃ for at least 10min to prepare a first solution, adding 0.02-0.08 part of potassium persulfate into 0.5-1 part of distilled water, uniformly stirring to prepare a second solution, then adding 0.3-0.8 part of methacrylic acid and 0.1-0.5 part of styrene into the first solution, and carrying out polymerization reaction for at least 30min under stirring to prepare a styrene-acrylic copolymer core emulsion; adding 0.5-2 parts of methacrylic acid, 1-3 parts of methyl methacrylate, 2-5 parts of isooctyl acrylate, 0.5-4 parts of isooctyl methacrylate, 0.1-0.5 part of acetoacetoxy ethyl methacrylate, 1.8-3.5 parts of ethylene-vinyl acetate copolymer and 0.1-0.2 part of potassium persulfate into the product obtained in the previous step, and continuously carrying out polymerization reaction for at least 30min at 85-88 ℃ under stirring to obtain a core-shell acrylic acid ionomer emulsion, namely an acrylic copolymer, wherein the ethylene-vinyl acetate copolymer is subjected to pre-irradiation by using beta rays in an air atmosphere by using an electron accelerator before the second step is added, the pre-irradiation dose is 20-30kGy, and the pre-irradiation time is 5-15 min; then adding ethylene-vinyl acetate copolymer emulsion into the acrylic copolymer;
the preparation method of the component B comprises the following steps: mixing 2-4 parts of zinc acetate, 1-2 parts of ammonia water, 0.1-1 part of water-soluble polyvinyl alcohol and 60-100 parts of distilled water, and uniformly stirring, wherein the concentration of the ammonia water is 25%;
the quartz sand pretreatment method comprises the following steps: removing impurities from quartz sand, washing with water, drying, adding into ethanol solution containing 5-10 wt% water-soluble polyvinyl alcohol, stirring at 80-85 deg.C for at least 2 hr, and drying;
step two: and (3) uniformly mixing the two pretreated quartz sands, adding the two pretreated quartz sands into the component A, continuously stirring at the rotating speed of 1500-800 rpm until the two quartz sands are uniform, barreling the mixture for storage, and separately barreling the component B for later use, wherein when the component B is used, the component B is dropwise added into a mixed system of the aggregate and the component A and continuously stirred at the rotating speed of 500-800 rpm.
6. The method for preparing a quick-drying type real stone paint according to claim 5, wherein: in the first step, quartz sand is pretreated and then placed into a ball mill, a silane coupling agent is added into the ball mill to perform ball milling at the temperature of 80-85 ℃, the adding mass of the silane coupling agent is 0.5% -1% of that of the quartz sand, and after the ball milling is completed, the temperature is naturally reduced to room temperature, and then modified quartz sand powder is classified.
7. The method for preparing a quick-drying type real stone paint according to claim 5, wherein: in the first step, the method also comprises the step of carrying out modification treatment on the hollow glass beads, and the specific operation is as follows: washing and drying the hollow glass beads, putting the washed and dried hollow glass beads into an ethanol solution containing 5-10 wt% of water-soluble polyvinyl alcohol, continuously stirring for at least 2 hours at 80-85 ℃, and drying; immersing the mixture into an ethanol solution containing a silane coupling agent with the volume concentration of 5-10%, continuously stirring for at least 2h at the temperature of 80-85 ℃, and drying; in the second step, the hollow glass beads after modification treatment and two kinds of quartz sand are uniformly mixed and then added into the component A.
8. The method for preparing a quick-drying type real stone paint according to any one of claims 5 to 7, characterized in that: the silane coupling agent is at least one of 3-aminopropyltriethoxysilane and gamma-methacryloxypropyltrimethoxysilane, the ethylene-vinyl acetate copolymer is 20-25% of vinyl acetate by mass percent, and the water-soluble polyvinyl alcohol is polyvinyl alcohol 1788.
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| CN112724759A (en) * | 2020-12-24 | 2021-04-30 | 河南天虹节能墙体材料有限公司 | Quick-drying type real stone paint suitable for low-temperature environment |
| CN115286964A (en) * | 2022-03-23 | 2022-11-04 | 商洛学院 | Heat-preservation stone-like paint taking molybdenum tailings and molybdenum ore waste stone machine-made sand as aggregate, preparation method of heat-preservation stone-like paint and coating system containing heat-preservation stone-like paint |
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