CN113045985A - Organosilicon building waterproof coating and preparation method thereof - Google Patents
Organosilicon building waterproof coating and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention relates to the field of building waterproof coatings, and provides a silicone building waterproof coating aiming at the problem of poor stability of an organosilicon waterproofing agent, which comprises the following components: the coating comprises, by mass, 30-50 parts of long-chain alkyl trialkoxysilane, 2-20 parts of silicone resin powder, 4-8 parts of an emulsifier, 0.5-5 parts of a film-forming agent, 0.5-3 parts of a thickener, 0.1-0.5 part of a defoaming agent and 29-63 parts of water. According to the invention, the silicone resin powder is introduced, so that the waterproof effect of the long-chain alkyl trialkoxysilane can be improved, and the strength of a polysiloxane waterproof film formed after the long-chain alkyl trialkoxysilane is crosslinked can be enhanced. The waterproof coating has excellent characteristics of ultraviolet resistance, high and low temperature resistance, aging resistance, good permeability and the like, can be applied to waterproofing of roofs, building outer walls, subways, tunnels, underground buildings and other places, and also has the advantages of safety, environmental protection and the like. The invention also provides a preparation method of the organic silicon building waterproof coating.
Description
Technical Field
The invention relates to the field of building waterproof coatings, in particular to an organic silicon building waterproof coating and a preparation method thereof.
Background
Since the 80 s of the last century, the development of novel building waterproof materials in China has been rapid. From the overall structure proportion of the novel waterproof material in China, the asphalt-based waterproof material is still taken as the main material, and accounts for 80% of the whole waterproof material, about 10% of the high-polymer waterproof coiled material, and about 10% of the waterproof coating and other waterproof materials.
Polyurethane and acrylic building exterior wall waterproof coatings in the market need repeated maintenance for a plurality of times because the coatings cannot stand severe external environments such as sunshine, rain, ultraviolet irradiation and the like for a long time, and labor cost and resource waste are greatly increased. And the organosilicon material has excellent weather resistance such as ultraviolet resistance, high and low temperature resistance, aging resistance and the like, and can be applied to the building outer wall as a coating to well solve the waterproof problem of the building outer wall.
At present, the first-generation organosilicon waterproofing agent is common in the market, and the main varieties are sodium methyl silicate and potassium methyl silicate products. For example, a chinese patent publication No. CN103965773A discloses a silicone waterproof coating, comprising: 37.5-62.5% of sodium silicate, 0.3-1.0% of expanding agent, 0.3-1.0% of cosolvent, 10-20% of heat-insulating filler, 5-10% of plasticizer and 5-10% of MS solvent resin; the sodium silicate is methyl sodium silicate and ethyl sodium silicate, wherein the methyl sodium silicate accounts for 22.5-37.5%, the ethyl sodium silicate accounts for 15-25%, and the mass ratio of the methyl sodium silicate to the ethyl sodium silicate is set to be 1.5:1 or 2: 1; in the preparation method, sodium methyl silicate and sodium ethyl silicate are selected, then a separation device is carried out according to the mass ratio in a formula table, the sodium methyl silicate and the sodium ethyl silicate are poured into a reaction container provided with a reflux condensing device according to the set proportion in the formula, a cosolvent and mica powder are prepared by mixing in the reaction container, stirring and heating are carried out under a closed condition, reflux is carried out, and MS solvent type resin in the set proportion in the formula is dripped from a constant pressure funnel after reflux. The invention can increase the toughness of the concrete, improve the tensile strength and the waterproof performance, and is simple to operate and use. However, the sodium methyl silicate is too strong in alkalinity, so that the surface of a building is easily yellowed, and the appearance of the building is influenced; meanwhile, the methyl silicate can be hydrolyzed under strong alkaline conditions to generate silanol which is dissolved in water and washed away by rainwater, so that the waterproof effect is lost after a period of time. In addition, the commercially available long-chain alkyl trialkoxysilane waterproof agent needs to be diluted by a solvent for use, so that potential safety hazards such as environmental pollution, ignition and the like exist. Accordingly, an ideal solution is needed.
Disclosure of Invention
The invention provides an organosilicon building waterproof coating for overcoming the problem of poor stability of an organosilicon waterproofing agent, which has the advantages of good permeability, ultraviolet resistance, high and low temperature resistance, aging resistance, rain wash resistance and the like, and can be applied to waterproofing of places such as building outer walls, subways, tunnels, underground buildings and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
an organic silicon building waterproof coating comprises the following components: the coating comprises, by mass, 30-50 parts of long-chain alkyl trialkoxysilane, 2-20 parts of silicone resin powder, 4-8 parts of an emulsifier, 0.5-5 parts of a film-forming agent, 0.5-3 parts of a thickener, 0.1-0.5 part of a defoaming agent and 29-63 parts of water. According to the invention, the silicone resin powder is introduced, so that the waterproof effect of the long-chain alkyl trialkoxysilane can be improved, and the strength of a polysiloxane waterproof film formed after the long-chain alkyl trialkoxysilane is crosslinked can be enhanced. The waterproof coating has excellent characteristics of ultraviolet resistance, high and low temperature resistance, aging resistance, good permeability and the like, can be applied to waterproofing of roofs, building outer walls, subways, tunnels, underground buildings and other places, and also has the advantages of safety, environmental protection and the like.
Preferably, the long-chain alkyl trialkoxysilane has a long-chain alkyl group with a carbon number of 5-14, and the alkoxy group is a methoxy group and/or an ethoxy group.
Preferably, the preparation method of the silicone resin powder comprises the following steps: spraying the slurry high-boiling-point substance into water by adopting a pressure atomization treatment technology for hydrolysis, and supplementing a certain amount of water into the reactor every 10-30 min to keep the acid water concentration of the system below 15%, and simultaneously keeping the stirring rotation speed at 800-1500 rpm to obtain the silicone resin with uniform particle size; washing the silicon resin with water until the pH value is less than 5, reacting the silicon resin with an alkali solution to prepare an alkyl silicon alkoxide crude product, filtering, and reacting the filtrate with an acid to obtain micron-sized super-hydrophobic silicon resin powder; the slurry high-boiling-point substance is a liquid high-boiling-point substance which is discharged along with the superfine waste silicon powder at the bottom of a washing tower of the methyl chlorosilane monomer synthesis device, and enters a slurry tank after valuable products are recovered by distillation.
The organosilicon material can not be prepared from organosilicon monomers, and methylchlorosilane is the most important organosilicon monomer with the largest dosage. Liquid high-boiling-point substances in methyl chlorosilane monomer synthesis are used as raw materials, hydrolysis of the high-boiling-point substances is realized through pressurization and atomization treatment, the high-boiling-point substances are converted into silicon resin, and the problem that a large amount of high-boiling-point substances are excessive in an organic silicon monomer production device is solved. The reaction is easy to control, the process is simple and convenient, the conditions are mild, and the obtained micron-sized super-hydrophobic silicon resin powder is uniform in particle size distribution and low in residual chlorine.
Preferably, the pressure atomization treatment technology is as follows: the reaction solution is filled in a pressure-resistant container, one or more of nitrogen, air, carbon dioxide, oxygen and argon are filled under the stirring condition, the pressure in the container is in the range of 0-0.6 MPa, and the gas is atomized and sprayed onto the surface of water through a nozzle.
Preferably, the base is sodium hydroxide and/or potassium hydroxide and the acid is hydrochloric acid.
Preferably, the silicone resin powder is subjected to a modification treatment: adding 50-80 parts of distilled water and 5-10 parts of HOOC (CH)2)17NH3Heating Cl-modified montmorillonite and 20-40 parts of silicon resin powder to dissolve, adding concentrated sulfuric acid, reacting at 200-300 ℃ under 1-1.5MPa for 8-12h, cooling and drying to obtain the modified silicon resin powder. Some silicon hydroxyl groups are remained at the terminal of the silicon resin, and the existence of the silicon hydroxyl groups can promote the degradation of silicon-oxygen chains of the organic silicon resin at high temperature, so that the thermal stability of the waterproof coating is reduced. However, the existence of the silicon hydroxyl bond endows the organic silicon resin with reactive groups, and researches show that after a proper amount of montmorillonite is grafted to the organic silicon resin, the silicon hydroxyl bond is reacted, and the water-swelling characteristic of the montmorillonite enhances the waterproof performance of the waterproof coating. Specifically, after water infiltration, the skin takes offThe stone preferentially absorbs water, locks moisture, prevents that moisture from permeating the waterproof layer, and the montmorillonite can expand after absorbing water in addition, strengthens the bonding degree between waterproof layer and the coating basic unit, has also strengthened the intensity of waterproof layer. Of course, the amount of montmorillonite used should be strictly controlled to prevent excessive deformation of the waterproof layer due to its water swelling property.
Preferably, the film forming agent is one or more of dodecyl alcohol ester, styrene-acrylic emulsion, silicone-acrylic emulsion and pure acrylic emulsion.
The invention also provides a preparation method of the organic silicon building waterproof coating, which comprises the following steps: mixing long-chain alkyl trialkoxysilane and an emulsifier, dropwise adding water while stirring, and finishing adding the rest water after finishing emulsion phase inversion; and adding the silicon resin powder, continuing stirring, adding the thickening agent and the pure acrylic emulsion, stirring, adding the defoaming agent, and stirring to obtain the waterproof coating.
Therefore, the invention has the following beneficial effects: (1) according to the invention, the silicone resin powder is introduced, so that the waterproof effect of the long-chain alkyl trialkoxysilane can be improved, and the strength of a polysiloxane waterproof film formed after the long-chain alkyl trialkoxysilane is crosslinked can be enhanced; (2) the waterproof coating has excellent characteristics of ultraviolet resistance, high and low temperature resistance, aging resistance, good permeability and the like, can be applied to waterproofing of roofs, building outer walls, subways, tunnels, underground buildings and other places, and also has the advantages of safety, environmental protection and the like; the added silicone resin powder takes the organic silicon high-boiling residues as a main raw material, so that the difficulty in utilizing part of the organic silicon high-boiling residues is relieved; (3) after a proper amount of montmorillonite is grafted to the organic silicon resin, silicon hydroxyl bonds are reacted, and the waterproof performance of the waterproof coating is enhanced due to the water swelling characteristic of the montmorillonite.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
In the present invention, unless otherwise specified, all the raw materials and equipment used are commercially available or commonly used in the art, and the methods in the examples are conventional in the art unless otherwise specified.
Example 1
A preparation method of organic silicon building waterproof paint,
1) preparation of silicone resin powder: adding 100 parts of water into a pressure-resistant container, then hydrolyzing slurry high-boiling substances (liquid high-boiling substances entering a slurry residue tank after valuable products are recovered by distillation and discharged from the bottom of a washing tower of a methyl chlorosilane monomer synthesis device and entering the slurry residue tank, the same below) by adopting a pressure atomization treatment technology, specifically, charging nitrogen into the pressure-resistant container filled with 50 parts of slurry high-boiling substances under the stirring condition to ensure that the pressure in the container is within the range of 0-0.6 MPa, atomizing the gas through a nozzle, spraying the atomized gas onto the surface of water, supplementing a certain amount of water into a reactor every 10min in the hydrolysis process to ensure that the acid water concentration of the system is kept below 15%, simultaneously keeping the stirring speed at 800 revolutions per minute to obtain silicon resin with uniform particle size, washing the silicon resin to a pH value of less than 5, reacting with sodium hydroxide to prepare corresponding alkyl silicon alkoxide, filtering and reacting filtrate with hydrochloric acid, obtaining micron-sized super-hydrophobic silicon resin powder with uniform particle size distribution and low residual chlorine;
2) preparing a waterproof coating: adding 50 parts of isobutyl triethoxysilane and 6 parts of emulsifier into a three-necked bottle according to the mass parts (the same below), stirring for 10min, slowly dripping water, finishing adding the rest water after finishing the phase inversion of the emulsion, and totally using 35.5 parts of water; then adding 7.5 parts of silicon resin powder, continuing stirring for 30min, then adding 0.5 part of thickening agent and 0.5 part of pure acrylic emulsion, stirring for 10min, finally adding 0.2 part of defoaming agent, stirring for 3min, and bottling.
Example 2
A preparation method of organic silicon building waterproof paint,
1) preparing the silicon resin: adding 100 parts of water into a pressure-resistant container, then hydrolyzing the slurry high-boiling substance by adopting a pressure atomization treatment technology, specifically, charging air into the pressure-resistant container filled with 50 parts of slurry high-boiling substance under the stirring condition, enabling the pressure in the container to be within the range of 0-0.6 MPa, atomizing the gas through a nozzle, spraying the gas onto the surface of the water, supplementing a certain amount of water into a reactor every 30min in the hydrolysis process, keeping the acid water concentration of the system below 15%, simultaneously keeping the stirring speed at 1500 rpm, obtaining silicon resin with uniform particle size, washing the silicon resin with water until the pH is less than 5, reacting the silicon resin with potassium hydroxide to obtain corresponding alkyl silicon alkoxide, filtering, and reacting the filtrate with hydrochloric acid to obtain micron-sized super-hydrophobic silicon resin powder with uniform particle size distribution and low chlorine residue;
2) preparing a waterproof coating: adding 10 parts of n-tetradecyl trimethoxy silane, 20 parts of n-octyl triethoxy silane and 5 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, adding the rest water after finishing the phase inversion of the emulsion, totally using 39.3 parts of water, then adding 20 parts of silicon resin powder, continuously stirring for 30min, adding 0.5 part of thickener and 5 parts of phenylpropyl emulsion, stirring for 10min, finally adding 0.2 part of defoamer, stirring for 3min, and bottling.
Example 3
A preparation method of organic silicon building waterproof paint,
1) preparing the silicon resin: adding 100 parts of water into a pressure-resistant container, then hydrolyzing the slurry high-boiling substance by adopting a pressure atomization treatment technology, specifically, charging mixed gas of oxygen and argon with the volume ratio of 1:2 into the pressure-resistant container filled with 50 parts of slurry high-boiling substance under the stirring condition to ensure that the pressure in the container is within the range of 0-0.6 MPa, atomizing the gas by a nozzle, spraying the atomized gas onto the surface of water, supplementing a certain amount of water into the reactor every 20min during the hydrolysis process to ensure that the acid water concentration of the system is kept below 15%, simultaneously keeping the stirring rotation speed at 1000 r/min to obtain silicon resin with uniform particle size, washing the silicon resin with water until the pH is less than 5, reacting with potassium hydroxide and sodium hydroxide with the molar ratio of 1:1 to obtain corresponding alkyl silicon alkoxide, filtering, reacting the filtrate with hydrochloric acid, washing, filtering, drying and the like after the reaction is finished, obtaining micron-sized super-hydrophobic silicon resin powder with uniform particle size distribution and low residual chlorine;
2) preparing a waterproof coating: adding 50 parts of n-octyl triethoxysilane and 8 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, finishing phase inversion of emulsion, adding the rest water, using 29.8 parts of water totally, adding 9 parts of silicon resin powder, continuously stirring for 30min, adding 0.5 part of thickener and 2 parts of dodecanol ester, stirring for 10min, adding 0.2 part of defoamer, stirring for 3min, and bottling.
Example 4
A preparation method of organic silicon building waterproof paint,
1) preparing the silicon resin: adding 100 parts of water into a pressure-resistant container, then hydrolyzing the slurry high-boiling substance by adopting a pressure atomization treatment technology, specifically, charging carbon dioxide into the pressure-resistant container filled with 50 parts of slurry high-boiling substance under the stirring condition to enable the pressure in the container to be within the range of 0-0.6 MPa, atomizing gas through a nozzle, spraying the gas onto the surface of water, supplementing a certain amount of water into a reactor every 20min in the hydrolysis process, keeping the acid water concentration of the system below 15%, simultaneously keeping the stirring speed at 1000 rpm to obtain silicon resin with uniform particle size, washing the silicon resin with water until the pH is less than 5, reacting the silicon resin with sodium hydroxide to obtain corresponding alkyl silicon alkoxide, filtering, and reacting the filtrate with hydrochloric acid to obtain micron-sized super-hydrophobic silicon resin powder with uniform particle size distribution and low chlorine residue;
2) preparing a waterproof coating: adding 30 parts of n-octyl triethoxysilane, 10 parts of isobutyl triethoxysilane, 5 parts of n-dodecyl triethoxysilane and 8 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, finishing phase inversion of the emulsion, adding the rest water, totally using 39.8 parts of water, then adding 2 parts of silicon resin powder, continuously stirring for 30min, adding 3 parts of thickener and 2 parts of silicone-acrylate emulsion, stirring for 10min, finally adding 0.1 part of defoamer, stirring for 3min, and bottling.
Example 5
A preparation method of organic silicon building waterproof paint,
1) preparing the silicon resin: the same as example 1;
2) preparing a waterproof coating: adding 30 parts of n-dodecyl triethoxysilane and 4 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, finishing phase inversion of emulsion, adding the rest water, totally using 54.8 parts of water, then adding 5 parts of silicon resin powder, continuously stirring for 30min, then adding 2 parts of thickener and 4 parts of silicone-acrylate emulsion, stirring for 10min, and finally adding 0.5 part of silicone-acrylate emulsion
Stirring the defoaming agent for 3min, and bottling.
Example 6
1) Preparing the silicon resin: the same as example 1;
2) modification of silicone resin: 50 parts of distilled water and 5 parts of HOOC (CH) are added2)17NH3Heating Cl-modified montmorillonite and 20 parts of the silicon resin powder prepared in the step 1) to dissolve, adding concentrated sulfuric acid, reacting at 200 ℃ and 1MPa for 8 hours, cooling and drying to obtain modified silicon resin powder;
3) preparing a waterproof coating: adding 30 parts of n-dodecyl triethoxysilane and 4 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, finishing phase inversion of emulsion, adding the rest water, totally using 54.8 parts of water, then adding 5 parts of modified silicone resin powder, continuously stirring for 30min, then adding 2 parts of thickener and 4 parts of silicone-acrylate emulsion, stirring for 10min, finally adding 0.5 part of defoamer, stirring for 3min, and bottling.
Example 7
1) Preparing the silicon resin: the same as example 1;
2) modification of silicone resin: 80 parts of distilled water and 10 parts of HOOC (CH) are added2)17NH3Heating Cl-modified montmorillonite and 40 parts of silicone resin powder to dissolve, adding concentrated sulfuric acid, reacting at 300 ℃ and 1.5MPa for 12h, cooling and drying to obtain modified silicone resin powder;
3) preparing a waterproof coating: adding 30 parts of n-dodecyl triethoxysilane and 4 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, finishing phase inversion of emulsion, adding the rest water, totally using 54.8 parts of water, then adding 5 parts of modified silicone resin powder, continuously stirring for 30min, then adding 2 parts of thickener and 4 parts of silicone-acrylate emulsion, stirring for 10min, finally adding 0.5 part of defoamer, stirring for 3min, and bottling.
Comparative example 1
1) Preparing the silicon resin: the same as example 1;
2) modification of silicone resin: 80 parts of distilled water and 15 parts of HOOC (CH) are added2)17NH3Heating Cl-modified montmorillonite and 40 parts of silicone resin powder to dissolve, adding concentrated sulfuric acid, reacting at 300 ℃ and 1.5MPa for 12h, cooling and drying to obtain modified silicone resin powder;
3) preparing a waterproof coating: adding 30 parts of n-dodecyl triethoxysilane and 4 parts of emulsifier into a three-necked bottle, stirring for 10min, slowly dripping water, finishing phase inversion of emulsion, adding the rest water, totally using 54.8 parts of water, then adding 5 parts of modified silicone resin powder, continuously stirring for 30min, then adding 2 parts of thickener and 4 parts of silicone-acrylate emulsion, stirring for 10min, finally adding 0.5 part of defoamer, stirring for 3min, and bottling.
Performance testing
The silicone building waterproofing coatings of the above examples were tested according to the water absorption ratio and permeability test methods of JC/T902-2002 organosilicon waterproofing agent for building surface, and the compressive strength was tested according to GBT17671-1999, with the results shown in the following table:
analysis of results
According to the invention, the silicone resin powder is introduced, so that the waterproof effect of the long-chain alkyl trialkoxysilane is improved, and the strength of a polysiloxane waterproof film formed after the long-chain alkyl trialkoxysilane is crosslinked can be enhanced; the added silicone resin powder takes the organic silicon high-boiling substances as main raw materials, so that the problem of utilization of part of the organic silicon high-boiling substances is relieved, and the silicone resin powder has the advantages of safety and environmental protection. The water absorption ratio, permeability and compressive strength of the organosilicon building waterproof coatings of examples 1-7 all meet national standards, and the waterproof coatings have excellent characteristics of ultraviolet resistance, high and low temperature resistance, aging resistance, good permeability and the like, and can be applied to waterproofing of roofs, building outer walls, subways, tunnels, underground buildings and other places. Examples 6 and 7, the water absorption ratio was improved after the montmorillonite was grafted to the silicone resin, but within a reasonable range, the permeability was greatly reduced, the water resistance of the waterproof coating was improved, and the compressive strength of the waterproof layer was also improved. However, in comparative example 1, the amount of montmorillonite used was large and slight swelling was caused after water absorption, so that it was necessary to control the amount of montmorillonite to be within the range defined in the present invention.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An organic silicon series building waterproof coating is characterized by comprising the following components: the coating comprises, by mass, 30-50 parts of long-chain alkyl trialkoxysilane, 2-20 parts of silicone resin powder, 4-8 parts of an emulsifier, 0.5-5 parts of a film-forming agent, 0.5-3 parts of a thickener, 0.1-0.5 part of a defoaming agent and 29-63 parts of water.
2. The organosilicon building waterproof coating according to claim 1, wherein the long chain alkyl trialkoxysilane has 5 to 14 carbon atoms of long chain alkyl group, and the alkoxy group is methoxy group and/or ethoxy group.
3. The silicone-based waterproof architectural coating material according to claim 1 or 2, wherein the silicone resin powder is prepared by a method comprising: spraying the slurry high-boiling-point substance into water by adopting a pressure atomization treatment technology for hydrolysis, and supplementing a certain amount of water into the reactor every 10-30 min to keep the acid water concentration of the system below 15%, and simultaneously keeping the stirring rotation speed at 800-1500 rpm to obtain the silicone resin with uniform particle size; washing the silicon resin with water until the pH value is less than 5, reacting the silicon resin with an alkali solution to prepare an alkyl silicon alkoxide crude product, filtering, and reacting the filtrate with an acid to obtain micron-sized super-hydrophobic silicon resin powder; the slurry high-boiling-point substance is a liquid high-boiling-point substance which is discharged along with the superfine waste silicon powder at the bottom of a washing tower of the methyl chlorosilane monomer synthesis device, and enters a slurry tank after valuable products are recovered by distillation.
4. The organosilicon building waterproof coating of claim 1, wherein the pressure atomization treatment technique is: the reaction solution is filled in a pressure-resistant container, one or more of nitrogen, air, carbon dioxide, oxygen and argon are filled under the stirring condition, the pressure in the container is in the range of 0-0.6 MPa, and the gas is atomized and sprayed onto the surface of water through a nozzle.
5. The silicone-based architectural waterproofing coating according to claim 1, wherein said base is sodium hydroxide and/or potassium hydroxide, and the acid is hydrochloric acid.
6. The silicone-based architectural waterproof coating according to claim 1, wherein the silicone resin powder is modified by: adding 50-80 parts of distilled water and 5-10 parts of HOOC (CH)2)17NH3Heating Cl-modified montmorillonite and 20-40 parts of silicon resin powder to dissolve, adding concentrated sulfuric acid, reacting at 200-300 ℃ under 1-1.5MPa for 8-12h, cooling and drying to obtain the modified silicon resin powder.
7. The organosilicon building waterproof coating of claim 1, wherein the film-forming agent is one or more of dodecyl alcohol ester, styrene-acrylic emulsion, silicone-acrylic emulsion, and acrylic emulsion.
8. A method for preparing the organosilicon building waterproofing paint according to any of claims 1 to 7, characterized by comprising the steps of: mixing long-chain alkyl trialkoxysilane and an emulsifier, dropwise adding water while stirring, and finishing adding the rest water after finishing emulsion phase inversion; and adding the silicon resin powder, continuing stirring, adding the thickening agent and the pure acrylic emulsion, stirring, adding the defoaming agent, and stirring to obtain the waterproof coating.
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Address after: 324000 No. 20 Huayin North Road, Quzhou City, Zhejiang Province, China Applicant after: Zhejiang Zhongtian Dongfang fluorosilicone Material Co.,Ltd. Address before: 324000 No. 20 Huayin North Road, Quzhou City, Zhejiang Province, China Applicant before: ZHONGTIAN DONGFANG FLUORINE SILICON MATERIAL Co.,Ltd. |
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Application publication date: 20210629 |