CN115491058B - Multifunctional acrylic acid modified cement-based paint - Google Patents
Multifunctional acrylic acid modified cement-based paint Download PDFInfo
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- CN115491058B CN115491058B CN202211151242.1A CN202211151242A CN115491058B CN 115491058 B CN115491058 B CN 115491058B CN 202211151242 A CN202211151242 A CN 202211151242A CN 115491058 B CN115491058 B CN 115491058B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
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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
- C09D5/18—Fireproof paints including high temperature resistant paints
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to the technical field of cement-based paint preparation, and particularly discloses a multifunctional acrylic acid modified cement-based paint. The multifunctional acrylic acid modified cement-based paint comprises a component A and a component B; wherein the component A comprises acrylic emulsion, organic silicon resin and emulsified asphalt; the component B comprises cement; wherein the component A also comprises a multifunctional composite filler; the multifunctional composite filler comprises silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate. The multifunctional acrylic acid modified cement-based paint has the advantages of strong binding force with a foundation, high tensile strength, large elongation at break, strong adaptability, excellent shearing resistance, low cost, environmental protection and the like; meanwhile, the heat insulation, flame retardance, sound insulation and the like are achieved.
Description
Technical Field
The invention relates to the technical field of cement-based paint preparation, in particular to a multifunctional acrylic acid modified cement-based paint.
Background
The cement-based waterproof paint is a common material in the building construction process; is used for waterproofing a building body seepage and leakage prevention. Chinese patent 200910063614.3 discloses a water emulsion type organosilicon composite acrylic acid modified asphalt cement-based waterproof paint and a preparation method thereof. The water emulsion type organosilicon composite acrylic acid modified asphalt cement-based waterproof coating consists of a component A and a component B, wherein the component A comprises the following components: the weight ratio of the component B is 1:0.5-1.5; wherein the weight percentages of the raw materials and the components in the component A are respectively as follows: 30-70% of acrylic emulsion or styrene-acrylic emulsion, 1-30% of organic silicon resin, 10-50% of emulsified asphalt, 1-20% of filler, 0.1-3% of auxiliary agent and 1-10% of water; the component B comprises the following raw materials in percentage by weight: 70-100% of cement and 0-30% of filler. The adhesive has the characteristics of strong binding power with a base, high tensile strength, large elongation at break, strong adaptability, excellent shearing resistance, low cost, environmental protection and the like.
However, the inventor finds out in the study that the invention patent 200910063614.3 discloses a water emulsion type organosilicon composite acrylic modified asphalt cement-based waterproof coating which has defects in heat preservation, heat insulation, flame retardance, sound insulation and the like; is to be further improved.
Disclosure of Invention
In order to overcome at least one technical problem in the prior art, the invention provides a preparation method of high-quality graphene.
The technical problems to be solved by the invention are realized by the following technical scheme:
a multifunctional acrylic modified cement-based paint comprises a component A and a component B; wherein the component A comprises acrylic emulsion, organic silicon resin and emulsified asphalt; the component B comprises cement; wherein the component A also comprises a multifunctional composite filler;
the multifunctional composite filler comprises silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate.
According to the invention, the multifunctional composite filler with heat preservation, heat insulation and flame retardance functions such as the silica aerogel, the expanded perlite, the aluminum hydroxide and the barium stearate is added into the multifunctional acrylic acid modified cement-based coating, so that the prepared multifunctional acrylic acid modified cement-based coating has the heat preservation, heat insulation and flame retardance functions. Meanwhile, the multifunctional composite filler can also play a role in sound insulation.
Preferably, the weight ratio of the silica aerogel, the expanded perlite, the aluminum hydroxide and the barium stearate in the multifunctional composite filler is 5-10:3-6:2-4:1-3.
Most preferably, the weight ratio of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in the multifunctional composite filler is 8:5:3:2.
Preferably, the A component also comprises a composite dispersing agent.
The composite dispersing agent consists of polyethylene glycol monooleate and N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt.
The inventor finds that the multifunctional composite filler consisting of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate cannot be well and uniformly dispersed in acrylic emulsion, organic silicon resin and emulsified asphalt in the study; the addition of the dispersing agent can ensure that the multifunctional composite filler consisting of the silicon dioxide aerogel, the expanded perlite, the aluminum hydroxide and the barium stearate can be well dispersed in the acrylic emulsion, the organic silicon resin and the emulsified asphalt; therefore, the prepared multifunctional acrylic acid modified cement-based paint has lower heat conductivity coefficient, and further exerts excellent heat preservation and heat insulation effects.
However, the inventors have found in the study that a general dispersant or combination of dispersants does not enable a multifunctional composite filler consisting of silica aerogel, expanded perlite, aluminum hydroxide, and barium stearate to be well in acrylic emulsions, silicone resins, emulsified asphalt; the multifunctional acrylic acid modified cement-based paint prepared by adding the common dispersing agent or the combination of the dispersing agents does not have lower heat conductivity coefficient; the inventor has surprisingly found in a large number of experiments that when a composite dispersing agent consisting of polyethylene glycol monooleate and N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt is selected, the heat conductivity coefficient of the multifunctional acrylic acid modified cement-based coating prepared is greatly smaller than that of the multifunctional acrylic acid modified cement-based coating prepared by adding other dispersing agents or the combination of other dispersing agents; the heat conductivity coefficient of the modified cement-based paint is also greatly smaller than that of a multifunctional acrylic acid modified cement-based paint prepared by singly adopting polyethylene glycol monooleate or singly adopting N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt as a dispersing agent; polyethylene glycol monooleate and N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt can synergistically reduce the thermal conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based paint.
Preferably, the weight ratio of polyethylene glycol monooleate to N-ricinoleic acid acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt in the composite dispersing agent is 2-4:1-2.
Most preferably, the weight ratio of polyethylene glycol monooleate to N-ricinoleic acid acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid internal salt in the composite dispersing agent is 3:2.
Preferably, the multifunctional composite filler is a modified multifunctional composite filler; the modified multifunctional composite filler is prepared by the following method:
(1) Mixing silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate, and then placing the mixture into a discharge plasma sintering furnace to carry out plasma treatment for 20-40 min under the discharge voltage of 8-12 kV to obtain a mixed filler subjected to plasma treatment;
(2) And uniformly mixing the mixed filler subjected to plasma treatment with an ethanol solution containing a composite modifier to obtain a modified mixture, and drying the modified mixture to obtain the modified multifunctional composite filler.
The inventor surprisingly found in experiments that the modified multifunctional composite filler obtained by modifying the multifunctional composite filler consisting of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate by the method can further reduce the heat conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based coating.
In addition, the modified multifunctional composite filler prepared by the method is added into the multifunctional acrylic acid modified cement-based paint, and compared with the multifunctional composite filler which is not modified, the tensile strength, particularly the tensile strength after aging, of the prepared multifunctional acrylic acid modified cement-based paint can be improved.
Preferably, in the step (1), the weight ratio of the silica aerogel to the expanded perlite to the aluminum hydroxide to the barium stearate is 5-10:3-6:2-4:1-3.
Most preferably, in step (1), the weight ratio of silica aerogel, expanded perlite, aluminum hydroxide, and barium stearate is 8:5:3:2.
Preferably, in the step (2), the weight amount of the ethanol solution containing the composite modifier is 1 to 2 times the weight of the plasma-treated mixed filler.
Most preferably, in step (2), the amount of the ethanol solution containing the composite modifier by weight is 1.5 times the amount of the plasma-treated mixed filler by weight.
In the step (2), the mass fraction of the composite modifier in the ethanol solution containing the composite modifier is 3-6%.
Most preferably, in the step (2), the mass fraction of the composite modifier in the ethanol solution containing the composite modifier is 5%.
Preferably, the compound modifier in the step (2) consists of castor oil polyoxyethylene ether, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate.
The inventor finds that in the process of modifying the multifunctional composite filler, the selection of the modifier plays a decisive role in whether the prepared modified multifunctional composite filler can further greatly reduce the heat conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based paint and whether the tensile strength of the prepared multifunctional acrylic acid modified cement-based paint can be greatly improved.
The inventor has shown through a great deal of experimental study that the modified multifunctional composite filler is prepared by selecting a composite modifier consisting of castor oil polyoxyethylene ether, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate; the degree of reduction of the thermal conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based paint is far higher than that of the tensile strength of the prepared multifunctional acrylic acid modified cement-based paint, and the degree of improvement of the tensile strength of the prepared multifunctional acrylic acid modified cement-based paint is far higher than that of the prepared multifunctional acrylic acid modified cement-based paint by selecting other components.
Wherein, the weight ratio of the castor oil polyoxyethylene ether to the octadecyl (2-sulfurous acid) ethyldimethyl ammonium to the isopropyl tri (dodecylbenzenesulfonyl) titanate is 4-6:2-4:1-2.
Most preferably, the weight ratio of castor oil polyoxyethylene ether, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate is 5:3:2.
Preferably, the component A comprises the following raw material components in parts by weight: 30-70 parts of acrylic emulsion; 1-30 parts of organic silicon resin; 5-50 parts of emulsified asphalt.
Preferably, the weight part of the multifunctional composite filler in the component A is 10-20 parts.
Most preferably, the weight part of the multifunctional composite filler in the component A is 15 parts;
preferably, the weight part of the composite dispersing agent in the component A is 1-3 parts.
Most preferably, the weight part of the composite dispersant in the A component is 2 parts.
The beneficial effects are that: the invention provides a novel multifunctional acrylic acid modified cement-based paint; compared with the prior art, the adhesive has the advantages of strong bonding force with a base, high tensile strength, large elongation at break, strong adaptability, excellent shearing resistance, low cost, environmental protection and the like; meanwhile, the heat insulation, flame retardance, sound insulation and the like are achieved.
In a preferred embodiment of the invention, the multifunctional acrylic modified cement-based paint is watertight at 0.6MPa for 30 min; the bonding strength with the steel plate is more than or equal to 1.3MPa, and the heat conductivity coefficient is less than or equal to 0.05W/(m.K); the combustion performance meets the B1 grade requirement in GB 8624-2012; the random incidence sound absorption coefficient is more than or equal to 0.35; no flow occurs at 240 ℃ for 0.5 h; the salt spray resistant 1000h coating has no obvious change; the tensile strength is more than or equal to 2.0MPa after the ultraviolet aging resistance is continuously tested for 1000 hours.
Detailed Description
The present invention is further explained below with reference to specific examples, which are not intended to limit the present invention in any way.
The acrylic emulsion in the following examples was an acrylic emulsion of the company basf under the trade name Acronal 7026G; the organic silicon resin is water-based organic silicon resin with the mark of MPF52E of German Wake company; the emulsified asphalt is selected from the emulsified asphalt with the brand number RHLW1-2 of macro brands. The remaining raw materials of unspecified origin are all conventional raw materials available commercially to those skilled in the art.
Example 1 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of multifunctional composite filler; 2 parts of a composite dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein the multifunctional composite filler in the component A consists of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2;
the composite dispersing agent in the component A consists of polyethylene glycol 200 monooleate and N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt in a weight ratio of 3:2.
The preparation method comprises the following steps:
adding the emulsified asphalt heated to 70 ℃ in the component A into a stirring device, and then sequentially adding the acrylic emulsion, water, the organic silicon resin, the multifunctional composite filler and the composite dispersing agent, and uniformly stirring; and then adding the cement in the component B, and stirring uniformly to obtain the multifunctional acrylic acid modified cement-based paint.
Example 2 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of modified multifunctional composite filler; 2 parts of a composite dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein, the modified multifunctional composite filler in the component A is prepared by the following method:
(1) Mixing silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2, and then placing the mixture into a discharge plasma sintering furnace for plasma treatment for 30min under a discharge voltage of 10kV to obtain a plasma treated mixed filler;
(2) Uniformly mixing the mixed filler subjected to plasma treatment with 1.5 times of ethanol solution containing 5% of composite modifier by mass fraction to obtain a modified mixture, and drying the modified mixture to obtain the modified multifunctional composite filler;
wherein the composite modifier in the step (2) consists of castor oil polyoxyethylene ether EL-30, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate in a weight ratio of 5:3:2.
Comparative example 1 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of multifunctional composite filler; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein the multifunctional composite filler in the component A consists of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2;
the preparation method comprises the following steps:
adding the emulsified asphalt heated to 70 ℃ in the component A into a stirring device, and then sequentially adding the acrylic emulsion, water, the organic silicon resin and the multifunctional composite filler to stir uniformly; and then adding the cement in the component B, and stirring uniformly to obtain the multifunctional acrylic acid modified cement-based paint.
Comparative example 1 differs from example 1 in that comparative example 1 does not contain a dispersant.
Comparative example 2 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of multifunctional composite filler; 2 parts of dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein the multifunctional composite filler in the component A consists of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2;
the dispersing agent in the component A is polyethylene glycol 200 monooleate.
The preparation method comprises the following steps:
adding the emulsified asphalt heated to 70 ℃ in the component A into a stirring device, and then sequentially adding the acrylic emulsion, water, the organic silicon resin, the multifunctional composite filler and the dispersing agent into the stirring device to stir uniformly; and then adding the cement in the component B, and stirring uniformly to obtain the multifunctional acrylic acid modified cement-based paint.
Comparative example 2 differs from example 1 in that comparative example 2 uses only polyethylene glycol 200 monooleate as a dispersant. The dispersant of example 1 consisted of polyethylene glycol 200 monooleate and N-ricinoleic acid-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetate.
Comparative example 3 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of multifunctional composite filler; 2 parts of dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein the multifunctional composite filler in the component A consists of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2;
the dispersing agent in the component A is N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt.
The preparation method comprises the following steps:
adding the emulsified asphalt heated to 70 ℃ in the component A into a stirring device, and then sequentially adding the acrylic emulsion, water, the organic silicon resin, the multifunctional composite filler and the dispersing agent into the stirring device to stir uniformly; and then adding the cement in the component B, and stirring uniformly to obtain the multifunctional acrylic acid modified cement-based paint.
Comparative example 3 differs from example 1 in that comparative example 3 uses only the inner salt of N-ricinoleic acid-N-hydroxyethyl-N-carboxyethylethylenediamine acetate as a dispersant. The dispersant of example 1 consisted of polyethylene glycol 200 monooleate and N-ricinoleic acid-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetate.
Comparative example 4 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of multifunctional composite filler; 2 parts of a composite dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein the multifunctional composite filler in the component A consists of silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2;
the composite dispersing agent in the component A consists of polyethylene glycol 200 monooleate and dodecylbenzene sulfonic acid in a weight ratio of 3:2.
The preparation method comprises the following steps:
adding the emulsified asphalt heated to 70 ℃ in the component A into a stirring device, and then sequentially adding the acrylic emulsion, water, the organic silicon resin, the multifunctional composite filler and the composite dispersing agent, and uniformly stirring; and then adding the cement in the component B, and stirring uniformly to obtain the multifunctional acrylic acid modified cement-based paint.
Comparative example 4 differs from example 1 in that the dispersant of comparative example 4 consists of polyethylene glycol 200 monooleate and dodecylbenzenesulfonic acid. The dispersant of example 1 consisted of polyethylene glycol 200 monooleate and N-ricinoleic acid-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetate.
Comparative example 5 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of modified multifunctional composite filler; 2 parts of a composite dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein, the modified multifunctional composite filler in the component A is prepared by the following method:
(1) Mixing silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2, and then placing the mixture into a discharge plasma sintering furnace for plasma treatment for 30min under a discharge voltage of 10kV to obtain a plasma treated mixed filler;
(2) Uniformly mixing the mixed filler subjected to plasma treatment with 1.5 times of ethanol solution containing 5% of composite modifier by mass fraction to obtain a modified mixture, and drying the modified mixture to obtain the modified multifunctional composite filler;
wherein the composite modifier in the step (2) consists of castor oil polyoxyethylene ether EL-30 and isopropyl tri (dodecylbenzenesulfonyl) titanate with the weight ratio of 8:2.
Comparative example 5 differs from example 2 in that in the modification of the modified multifunctional composite filler, comparative example 5 employs a composite modifier consisting of castor oil polyoxyethylene ether EL-30 and isopropyl tri (dodecylbenzenesulfonyl) titanate; in example 2, a composite modifier consisting of castor oil polyoxyethylene ether EL-30, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate was used.
Comparative example 6 preparation of multifunctional acrylic modified Cement-based paint
The raw materials consist of a component A and a component B in a weight ratio of 1:1;
the component A comprises the following components in parts by weight: 60 parts of acrylic emulsion; 10 parts of organic silicon resin; 20 parts of emulsified asphalt; 15 parts of modified multifunctional composite filler; 2 parts of a composite dispersing agent; 10 parts of water;
the component B comprises the following components in parts by weight: 100 parts of cement;
wherein, the modified multifunctional composite filler in the component A is prepared by the following method:
(1) Mixing silica aerogel, expanded perlite, aluminum hydroxide and barium stearate in a weight ratio of 8:5:3:2, and then placing the mixture into a discharge plasma sintering furnace for plasma treatment for 30min under a discharge voltage of 10kV to obtain a plasma treated mixed filler;
(2) Uniformly mixing the mixed filler subjected to plasma treatment with 1.5 times of ethanol solution containing 5% of composite modifier by mass fraction to obtain a modified mixture, and drying the modified mixture to obtain the modified multifunctional composite filler;
wherein the composite modifier in the step (2) consists of octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate with the weight ratio of 8:2.
Comparative example 6 differs from example 2 in that comparative example 6 uses a composite modifier consisting of octadecyl (2-sulfurous acid) ethyldimethylammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate in the modification of the modified multifunctional composite filler; in example 2, a composite modifier consisting of castor oil polyoxyethylene ether EL-30, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate was used.
The thermal conductivity and the tensile strength of the multifunctional acrylic-modified cement-based paints prepared in examples 1 to 2 and comparative examples 1 to 6 after 1000 hours of ultraviolet aging resistance treatment are shown in Table 1.
As can be seen from the experimental data in Table 1, the multifunctional acrylic modified cement-based paint prepared in comparative example 1 without adding a dispersant has a thermal conductivity of 0.28W/(mK) and does not have excellent heat insulation performance. Example 1 the multifunctional acrylic acid modified cement-based paint prepared by adding the dispersant of the invention has greatly reduced thermal conductivity; the multifunctional composite filler composed of silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate can be well dispersed in acrylic emulsion, organic silicon resin and emulsified asphalt due to the addition of the dispersing agent; therefore, the prepared multifunctional acrylic acid modified cement-based paint has lower heat conductivity coefficient, and further can exert excellent heat preservation and heat insulation effects.
However, as shown in the data of Table 1, the multifunctional acrylic-modified cement-based paints prepared in comparative examples 2 to 4 have a thermal conductivity which is not greatly reduced as compared with comparative example 1; the thermal conductivity is much higher than in example 1; this illustrates: the general dispersing agent or the combination of the dispersing agents can not lead the multifunctional composite filler consisting of silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate to be well in acrylic emulsion, organic silicon resin and emulsified asphalt; the multifunctional acrylic acid modified cement-based paint prepared by adding the common dispersing agent or the combination of the dispersing agents does not have lower heat conductivity coefficient; only the composite dispersing agent consisting of polyethylene glycol 200 monooleate and N-ricinoleic acid acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt is selected, so that the heat conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based paint can be greatly reduced; the heat conductivity coefficient of the modified cement-based paint is greatly smaller than that of the multifunctional acrylic modified cement-based paint prepared by adding other dispersing agents or the combination of other dispersing agents; the heat conductivity coefficient of the modified cement-based paint is also greatly smaller than that of a multifunctional acrylic acid modified cement-based paint prepared by singly adopting polyethylene glycol 200 monooleate or singly adopting N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt as a dispersing agent; polyethylene glycol 200 monooleate and N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt can synergistically reduce the thermal conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based paint.
The data in Table 1 show that the thermal conductivity coefficient of the multifunctional acrylic modified cement-based paint prepared in example 2 reaches 0.04W/(m.K), and is further greatly smaller than that of the multifunctional acrylic modified cement-based paint prepared in example 1. This means that the modified multifunctional composite filler prepared by the method of the invention is added into the multifunctional acrylic acid modified cement-based paint, which can further reduce the heat conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based paint. However, the multifunctional acrylic-modified cement-based paints prepared in comparative examples 5 and 6 have thermal conductivity which is not significantly reduced compared to example 1, and which is significantly reduced in magnitude compared to example 2. This illustrates: in the modification process of the multifunctional composite filler, the selection of the modifier plays a decisive role in further greatly reducing the heat conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based coating. The modified multifunctional composite filler prepared by modifying the multifunctional composite filler only adopts a composite modifier consisting of castor oil polyoxyethylene ether EL-30, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate, so that the heat conductivity coefficient of the prepared multifunctional acrylic acid modified cement-based coating can be further greatly reduced.
The multifunctional acrylic-modified cement-based paint prepared in example 2 has a tensile strength after aging much higher than that of example 1 and comparative example 1; this illustrates: compared with the unmodified multifunctional composite filler, the modified multifunctional composite filler prepared by the method can also improve the tensile strength of the prepared multifunctional acrylic acid modified cement-based coating after aging. However, the multifunctional acrylic-modified cement-based paints prepared in comparative examples 5 and 6, the tensile strength after aging was not significantly improved compared to those of example 1 and comparative example 1, and the improvement was much smaller than that of example 2. This illustrates: in the modification process of the multifunctional composite filler, the selection of the modifier plays a decisive role in whether the prepared modified multifunctional composite filler can further improve the tensile strength of the prepared multifunctional acrylic acid modified cement-based coating after aging. Only the modified multifunctional composite filler prepared by modifying the multifunctional composite filler by selecting a composite modifier consisting of castor oil polyoxyethylene ether EL-30, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecylbenzenesulfonyl) titanate can further greatly improve the tensile strength of the prepared multifunctional acrylic acid modified cement-based coating after aging.
Claims (13)
1. A multifunctional acrylic modified cement-based paint comprises a component A and a component B; wherein the component A comprises acrylic emulsion, organic silicon resin and emulsified asphalt; the component B comprises cement; wherein, the component A also comprises a multifunctional composite filler;
the multifunctional composite filler comprises silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate;
the component A also comprises a composite dispersing agent;
the composite dispersing agent consists of polyethylene glycol monooleate and N-castor oil acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid inner salt;
the weight ratio of the silica aerogel, the expanded perlite, the aluminum hydroxide and the barium stearate in the multifunctional composite filler is 5-10:3-6:2-4:1-3;
the weight ratio of polyethylene glycol monooleate to N-ricinoleic acid acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetic acid internal salt in the composite dispersing agent is 2-4:1-2.
2. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein the weight ratio of silica aerogel, expanded perlite, aluminum hydroxide, and barium stearate in the multifunctional composite filler is 8:5:3:2.
3. The multifunctional acrylic modified cement-based paint according to claim 1, wherein the weight ratio of polyethylene glycol monooleate to N-ricinoleic acid acyl-N-hydroxyethyl-N-carboxyethyl ethylenediamine acetate in the composite dispersant is 3:2.
4. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein the multifunctional composite filler is a modified multifunctional composite filler; the modified multifunctional composite filler is prepared by the following method:
(1) Mixing silicon dioxide aerogel, expanded perlite, aluminum hydroxide and barium stearate, and then placing the mixture into a discharge plasma sintering furnace to carry out plasma treatment for 20-40 min under the discharge voltage of 8-12 kV to obtain a mixed filler subjected to plasma treatment;
(2) Uniformly mixing the mixed filler subjected to plasma treatment with an ethanol solution containing a composite modifier to obtain a modified mixture, and drying the modified mixture to obtain the modified multifunctional composite filler;
the composite modifier consists of castor oil polyoxyethylene ether, octadecyl (2-sulfurous acid) ethyldimethyl ammonium and isopropyl tri (dodecyl benzene sulfonyl) titanate.
5. The multifunctional acrylic-modified cement-based paint according to claim 4, wherein in the step (2), the weight amount of the ethanol solution containing the composite modifier is 1 to 2 times the weight of the plasma-treated mixed filler.
6. The multifunctional acrylic-modified cement-based paint according to claim 5, wherein the weight amount of the ethanol solution containing the composite modifier in the step (2) is 1.5 times the weight of the plasma-treated mixed filler.
7. The multifunctional acrylic-modified cement-based paint according to claim 4, wherein in the step (2), the mass fraction of the composite modifier in the ethanol solution containing the composite modifier is 3-6%.
8. The multifunctional acrylic-modified cement-based paint according to claim 7, wherein in the step (2), the mass fraction of the composite modifier in the ethanol solution containing the composite modifier is 5%.
9. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein the a component comprises the following raw material components in parts by weight: 30-70 parts of acrylic emulsion; 1-30 parts of organic silicon resin; 5-50 parts of emulsified asphalt.
10. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein the weight part of the multifunctional composite filler in the component A is 10-20.
11. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein the weight part of the multifunctional composite filler in the a component is 15 parts.
12. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein,
the weight part of the composite dispersing agent in the component A is 1-3.
13. The multifunctional acrylic-modified cement-based paint according to claim 1, wherein the weight part of the composite dispersant in the a component is 2 parts.
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| CN101220233A (en) * | 2008-01-22 | 2008-07-16 | 武汉阳光建筑新材料有限公司 | Emulsified acrylic acid modified asphalt cement group waterproof coating material and method for producing the same |
| CN101633573B (en) * | 2009-08-14 | 2012-12-26 | 武汉广益交通科技股份有限公司 | Water-emulsion organic silicon composited acrylic acid modified asphalt cement-base waterproof coating and preparation method thereof |
| BR112012029874A2 (en) * | 2010-05-25 | 2016-08-16 | Unilever Nv | solid sunscreen composition and non solid sunscreen composition |
| CN111205593A (en) * | 2018-11-21 | 2020-05-29 | 苏州巨峰先进材料科技有限公司 | Method for modifying filler surface by plasma |
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