CN109337550B - Aerogel water-based two-component transparent sound insulation coating and preparation and use method thereof - Google Patents

Aerogel water-based two-component transparent sound insulation coating and preparation and use method thereof Download PDF

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CN109337550B
CN109337550B CN201811032723.4A CN201811032723A CN109337550B CN 109337550 B CN109337550 B CN 109337550B CN 201811032723 A CN201811032723 A CN 201811032723A CN 109337550 B CN109337550 B CN 109337550B
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aerogel
organic silicon
water
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CN109337550A (en
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徐新祥
王鹏程
胡基如
王红梅
刘述敏
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SHENZHEN GUANGTIAN HIGH-TECH NEW MATERIALS Co.,Ltd.
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Shenzhen Grandland Environmental Friendly Paint Co ltd
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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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/007—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
    • C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
    • C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
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    • 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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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/112—Deposition methods from solutions or suspensions by spraying
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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Abstract

The invention provides an aerogel water-based bi-component transparent sound insulation coating and a preparation and use method thereof, wherein the aerogel water-based bi-component transparent sound insulation coating is prepared by mixing the following components in parts by weight: the component A comprises: 69-73 parts of aqueous polyurethane resin, 5.0-5.7 parts of film-forming additive, 0.2-0.4 part of organic silicon defoamer, 0.2-0.4 part of organic silicon substrate wetting agent, 0.3-0.5 part of organic silicon flatting agent, 20-25 parts of silicon dioxide aerogel aqueous dispersion and 0.1-0.2 part of preservative; and B component: a silane coupling agent having an epoxy structure; the component A comprises: the component B is 100: 1.5-2.5; the invention can ensure lighting, effectively reduce outdoor noise, ensure decorative, lighting and sound insulation effects of the building glass, and improve living environment of people.

Description

Aerogel water-based two-component transparent sound insulation coating and preparation and use method thereof
Technical Field
The invention relates to the field of functional water-based coatings for architectural decoration, in particular to an aerogel water-based two-component transparent sound insulation coating and a preparation and use method thereof.
Background
Urban noise mainly comes from traffic noise, industrial noise, building construction noise, social life noise and the like, and increasingly serious interference and harm to residents become a great public nuisance in urban environment.
At present, for high buildings where people live and live, due to the thickness and the material of the building wall, the high buildings can have a good isolation effect on urban noise pollution. However, the glass window is usually installed on the facade of the building to meet the ventilation and indoor lighting requirements of the building, and the glass window occupies about 20% or more of the area of the facade of the building, and the sound insulation effect of the glass window is poor, so that the sound insulation effect of the whole building is greatly reduced, especially in the residential areas along the overhead lines of the adjacent cities. In the prior art, people usually install double-layer glass on a window to improve the sound insulation effect, but the construction of the method is complicated and the cost is relatively high.
Disclosure of Invention
The invention aims to solve the technical problem of providing the aerogel water-based two-component transparent sound-insulation coating for building glass, which can ensure lighting and effectively reduce outdoor noise, and the preparation and use methods thereof, and simultaneously, the silica aerogel particles have good dispersibility and stability in the water-based coating and good compatibility with other components, and the coating formed by the coating has good adhesive force on the surface of the glass, thereby meeting the requirements of storage and construction, ensuring the decorative, lighting and sound-insulation effects of the building glass, and improving the living environment of people.
In order to solve the technical problems, the invention provides an aerogel water-based two-component transparent sound insulation coating which is prepared by mixing the following components in parts by weight:
the component A comprises: 69-73 parts of aqueous polyurethane resin, 5.0-5.7 parts of film-forming additive, 0.2-0.4 part of organic silicon defoamer, 0.2-0.4 part of organic silicon substrate wetting agent, 0.3-0.5 part of organic silicon flatting agent, 20-25 parts of silicon dioxide aerogel aqueous dispersion and 0.1-0.2 part of preservative;
and B component: a silane coupling agent having an epoxy structure;
the weight ratio of the component A to the component B is that the component A: the component B is 100: 1.5-2.5;
the silicon dioxide aerogel aqueous dispersion in the component A is prepared from the following components in parts by weight: 62.5-66.6 parts of deionized water, 2.8-3.2 parts of phenolic derivative nonionic hyper-dispersant, 28-32 parts of silicon dioxide aerogel particles, 1.4-1.6 parts of phosphate anionic dispersant, 0.6-1.0 part of polyurethane thickener and 0.1-0.2 part of organosilicon pH regulator.
As a preferable mode, the component A is prepared by mixing the following components in parts by weight:
the component A comprises: 71 parts of waterborne polyurethane resin, 5.35 parts of film-forming additive, 0.3 part of organic silicon defoamer, 0.3 part of organic silicon substrate wetting agent, 0.4 part of organic silicon leveling agent, 22.5 parts of silicon dioxide aerogel aqueous dispersion and 0.15 part of preservative;
the silicon dioxide aerogel aqueous dispersion is prepared from the following components in parts by weight: 64.5 parts of deionized water, 3.0 parts of phenolic derivative nonionic hyper-dispersant, 30 parts of silicon dioxide aerogel particles, 1.5 parts of phosphate anionic dispersant, 0.8 part of polyurethane thickener and 0.2 part of organosilicon pH regulator.
Preferably, the silica aerogel particles are transparent and light blue in appearance, have the particle size of 1-5 mm and the density of 70-120 kg/m3Porosity of>96.5 percent, and the specific surface area is 6000 to 1000m2The total pore volume is 2.0-4.2 cc/g, the average pore diameter is 20.9nm, and the thermal conductivity (25 ℃) is 0.016W/m.k; the phenolic derivative nonionic hyper-dispersant is colorless to light yellow viscous liquid in appearance, and the density of the phenolic derivative nonionic hyper-dispersant is 1.04-1.1 g/cm3The pH value of the water solution with the mass fraction of 1% is 5.5-8.5; the phosphate anionic dispersing agent is light yellow or red brown viscous liquid and has the density of 1.09-1.17 g/cm3The pH value of the water solution with the mass fraction of 1% is 1.0-5.0; the polyurethane thickener is nonionic association type, is a milky semitransparent slightly turbid liquid, has the solid content of 19-21 percent, the pH value of 5.5-8.5 and the density of 1.0-1.08 g/cm3(ii) a The organosilicon pH regulator is organosilicon potassium salt, is colorless clear or slightly turbid liquid in appearance, has solid content of about 55 percent and density of about 1.4g/cm3The pH value is 13-14.
Preferably, the appearance of the waterborne polyurethane resin is white emulsion, the solid content is more than or equal to 35 percent, the pH value is 7-8, and the hardness is more than or equal to H; the film-forming assistant is dipropylene glycol n-butyl ether and colorless transparent liquid, the solubility of the film-forming assistant in water is 5% at the temperature of 20 ℃, and the refractive index of the film-forming assistant is 1.425; the organic silicon defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and foam breaking polysiloxane, and the non-volatile content is more than 98 percent; the organic silicon base material wetting agent is a special polysiloxane/polyether copolymer, the appearance is transparent liquid, and the active matter content is 100%; the organic silicon flatting agent is polyether modified polydimethylsiloxane, the appearance of the organic silicon flatting agent is amber transparent liquid, and the solid content of the organic silicon flatting agent is more than or equal to 95 percent; the preservative is a high-temperature-resistant high-pH-value in-tank preservative, the active ingredient is benzisothiazolinone, the content of the active ingredient is more than 9.5%, and the pH value is 9-10;
preferably, the silane coupling agent with the epoxy structure is gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, is a yellowish transparent liquid with the appearance, the boiling point of 260-262 ℃, the density of 1.07g/mL, the refractive index of 1.426 and the content of more than or equal to 97 percent.
As a preferable mode, the silica aerogel particles are products of the high and new technology development limited company of tianjin morgen kunsiderd; the phenolic derivative type nonionic hyperdispersant is a product of marine chemistry with the model number DP 2883; the phosphate anionic dispersant is a product of a marine chemical industry with the model number DP 2195; the polyurethane thickener is a product of a marine wetting chemical industry with the model of TU 2881; the organosilicon pH value regulator is a product with the model number of BS168 produced by Wake company; the waterborne polyurethane resin is a product with a PUD885 model in the full-scale chemical production; the film-forming auxiliary agent is a product of Dow chemical type DPnB; the organic silicon defoaming agent is a product with a model number of BYK028 produced by Picker chemical company; the organic silicon substrate wetting agent is a product with a model Tego Wet KL245 of Digao chemical company; the organic silicon leveling agent is a product with a Silok350 model produced by Stokes chemical company; the preservative is a BT-type product produced by Hofmann chemical company; the silane coupling agent is a product of the Nanjing Pining coupling agent company with the model number of KH 560.
Preferably, the weight ratio of the component A to the component B is that the component A: the component B is 100: 2.
The invention also provides a preparation method of the aerogel water-based two-component transparent sound insulation coating, which comprises the following steps:
step one, preparing a silicon dioxide aerogel water dispersion;
adding deionized water into a pre-dispersion cylinder, adding a phenolic derivative type nonionic hyper-dispersant under stirring, stirring and mixing for 5-15 min, then adding silicon dioxide aerogel particles at the rotating speed of 300-500 r/min, pre-dispersing for 10-20 min, then sequentially adding a phosphate type anionic dispersant, a polyurethane thickener and an organic silicon pH regulator under stirring, stirring for 25-35 min at the rotating speed of 1400-1600 r/min until the materials are uniformly dispersed, and grinding for 1.5-2.5 h by using a sand mill to prepare silicon dioxide aqueous dispersion aerogel for use in the second step;
step two, preparing a component A:
adding waterborne polyurethane resin into a production cylinder, then sequentially adding a film-forming aid, an organic silicon defoamer, an organic silicon wetting agent and an organic silicon leveling agent under stirring, stirring for 5-15 min at a rotating speed of 400-600 rpm until the materials are uniform, then sequentially adding the silicon dioxide aerogel aqueous dispersion prepared in the first step and a preservative, and finally stirring for 15-25 min at a rotating speed of 400-600 rpm until the materials are uniform to obtain a component A finished product;
step three, preparing aerogel water-based two-component transparent sound insulation coating
And (3) adding deionized water with the same mass into the finished product of the silane coupling agent of the component B for dilution, then adding the diluted product into the component A prepared in the step two, and stirring the mixture for 5-15 min at the rotating speed of 100-300 r/min until the mixture is uniform to prepare the aerogel water-based two-component transparent sound insulation coating.
Preferably, the component A comprises 71 parts of waterborne polyurethane resin, 5.35 parts of film-forming additive, 0.3 part of organic silicon defoamer, 0.3 part of organic silicon substrate wetting agent, 0.4 part of organic silicon leveling agent, 22.5 parts of silicon dioxide aerogel aqueous dispersion and 0.15 part of preservative; the silicon dioxide aerogel aqueous dispersion comprises 64.5 parts of deionized water, 3.0 parts of phenolic derivative nonionic hyper-dispersant, 30 parts of silicon dioxide aerogel particles, 1.5 parts of phosphate anionic dispersant, 0.8 part of polyurethane thickener and 0.2 part of organosilicon pH regulator; the weight ratio of the component A to the component B is that the component A: the component B is 100: 2.
The invention also provides a using method of the aerogel water-based two-component transparent sound-insulation coating, which comprises the steps of mixing the component B and deionized water according to the mass ratio of 1:1, adding the component B and the deionized water into the component A, uniformly stirring, coating the mixture on the surface of glass by adopting a spraying process, drying the surface of the glass for 25-35 min, and baking the glass for 15-25 min at the temperature of 130-150 ℃ to form a coating of the aerogel water-based two-component transparent sound-insulation coating with sound insulation performance.
The invention relates to an aerogel water-based two-component transparent sound insulation coating and a preparation and use method thereof, and compared with the existing design, the aerogel water-based two-component transparent sound insulation coating has the advantages that: (1) according to the invention, the silica aerogel particles are applied to the glass sound insulation coating, the low acoustic impedance characteristic of the silica aerogel is fully utilized, the sound insulation effect of the coating is realized, the sound insulation performance of a glass window can be improved after the coating is coated on the glass, and the urban noise pollution problem is effectively solved. (2) Because the characteristic that the silicon dioxide aerogel particles are easy to agglomerate and have strong hydrophobicity can influence the dispersibility and stability of the silicon dioxide aerogel particles in the water-based paint and the compatibility of other components, therefore, adding phenolic derivative nonionic hyperdispersant with pigment affinity group and extremely strong anchoring group into the water-based paint to modify the surface of the silicon dioxide aerogel, meanwhile, phosphate anionic dispersing agent is matched to improve the dispersibility and easy aggregation characteristic of the silicon dioxide aerogel particles in water medium, the hyper-dispersing agent is utilized to carry out adsorption and hydrophilic modification on aerogel particles, then a layer of anion dispersant with negative electricity is coated on the outer layer, the charge repulsion is utilized to ensure that the aerogel does not agglomerate in the coating, thereby improving the stability of the silicon dioxide aerogel particles in the water-based paint and ensuring that the dispersibility and the stability of the silicon dioxide aerogel particles in the water-based paint are good in compatibility with other components. (3) The addition of the silica aerogel particles can influence the adhesive force of the coating on the glass, so that the silica aerogel is coated by using the siloxane coupling agent with epoxy groups in molecular chains, the siloxane coupling agent is fully subjected to crosslinking reaction with the waterborne polyurethane resin in the drying film-forming process and is chemically bonded with silanol groups on the surface of the glass to form covalent bonds, the unique epoxy functional group structure is favorable for forming a firm interpenetrating network three-dimensional crosslinking structure of an organic matrix, a silane coupling agent and an inorganic matrix, the aerogel sound insulation coating is ensured to be firmly attached to the surface of the glass, the problem that the addition of the silica aerogel influences the attachment of the coating on the glass is solved, and the durable use effect is ensured. (4) The waterborne polyurethane resin is selected as a film forming material and is mixed with other additives to prepare the waterborne transparent sound insulation coating which is applied to the glass surface of a building and can effectively shield outdoor noise on the premise of not changing the light transmittance of the glass. (5) The invention is simple and easy to implement, environment-friendly and energy-saving, and is an effective way for promoting the research and development of new energy-saving technologies of buildings and the popularization and application of new products.
Detailed Description
The technical solution of the present invention will be further described below by way of examples, and each example is only a preferred embodiment to describe the technical solution of the present invention, and is not to be construed as limiting the present invention.
The aerogel water-based two-component transparent sound insulation coating disclosed by the invention consists of a component A and a component B, wherein the component A comprises the following components in parts by weight:
the component A is prepared by mixing and modulating the following components in parts by weight:
69-73 parts of aqueous polyurethane resin, 5.0-5.7 parts of film-forming additive, 0.2-0.4 part of organic silicon defoamer, 0.2-0.4 part of organic silicon substrate wetting agent, 0.3-0.5 part of organic silicon flatting agent, 20-25 parts of silicon dioxide aerogel aqueous dispersion and 0.1-0.2 part of preservative;
the silicon dioxide aerogel aqueous dispersion (aerogel aqueous dispersion for short) is prepared from the following components in parts by weight: 62.5-66.6 parts of deionized water, 2.8-3.2 parts of phenolic derivative nonionic hyper-dispersant, 28-32 parts of silicon dioxide aerogel particles, 1.4-1.6 parts of phosphate anionic dispersant, 0.6-1.0 part of polyurethane thickener and 0.1-0.2 part of organosilicon pH regulator.
The component B is a commercially available silane coupling agent with an epoxy structure.
The weight ratio of the component A to the component B is that the component A: the component B is 100: 1.5-2.5.
In order to ensure the sound insulation effect of the sound insulation coating on the glass window, the silicon dioxide aerogel particles are added into the coating, the characteristic of low acoustic impedance of the silicon dioxide aerogel is fully utilized, the sound insulation performance of the glass window is improved, and the urban noise pollution problem is effectively solved; preferably, the silica aerogel particles are transparent and light blue in appearance, the particle size is 1-5 mm, and the density is 70-120 kg/m3Porosity of>96.5 percent, and the specific surface area is 6000 to 1000m2The total pore volume is 2.0 to 4.2cc/g, the average pore diameter is 20.9nm, and the thermal conductivity (25 ℃) is 0.016W/m.k. However, since silica aerogel particles are easily agglomerated and have a strong hydrophobic property, in order to ensure the stability of the aerogel in an aqueous coating and to solve the problem of easy agglomeration of the aerogel, phenol is usedThe aldehyde derivative nonionic hyper-dispersant modifies the surface of the silicon dioxide aerogel particles, and meanwhile, the phosphate anionic dispersant is matched to improve the dispersibility and easy aggregation characteristic of the silicon dioxide aerogel powder in an aqueous medium; preferably, the phenolic derivative type nonionic hyper-dispersant is colorless to light yellow viscous liquid in appearance, and the density is 1.04-1.1 g/cm3The pH value of the water solution with the mass fraction of 1% is 5.5-8.5; the phosphate anionic dispersing agent is light yellow or red brown viscous liquid and has the density of 1.09-1.17 g/cm3The pH value of the water solution with the mass fraction of 1% is 1.0-5.0; the polyurethane thickener is nonionic association type, is a milky semitransparent slightly turbid liquid, has the solid content of 19-21 percent, the pH value of 5.5-8.5 and the density of 1.0-1.08 g/cm3(ii) a The organosilicon pH regulator is organosilicon potassium salt, is colorless clear or slightly turbid liquid in appearance, has a solid content of 55 percent and a density of 1.4g/cm3The pH value is 13-14.
In order to ensure that the light transmittance of the glass is not changed, selecting aqueous polyurethane resin as a film forming material, preferably, the appearance of the aqueous polyurethane resin is white emulsion, the solid content is more than or equal to 35 percent, the pH value is 7-8, and the hardness is more than or equal to H; the film-forming assistant is dipropylene glycol n-butyl ether and colorless transparent liquid, the solubility of the film-forming assistant in water is 5% at the temperature of 20 ℃, and the refractive index of the film-forming assistant is 1.425; the organic silicon defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and foam breaking polysiloxane, and the non-volatile content is more than 98 percent; the organic silicon base material wetting agent is a special polysiloxane/polyether copolymer, the appearance is transparent liquid, and the active matter content is 100%; the organic silicon flatting agent is polyether modified polydimethylsiloxane, the appearance of the organic silicon flatting agent is amber transparent liquid, and the solid content of the organic silicon flatting agent is more than or equal to 95 percent; the preservative is a high-temperature-resistant high-pH-value in-tank preservative, the active ingredient is benzisothiazolinone, the content of the active ingredient is more than 9.5%, and the pH value is 9-10.
Meanwhile, in order to ensure that the aerogel sound insulation coating is firmly attached to the surface of the glass and solve the problem that the addition of the silica aerogel influences the attachment of the coating on the glass, gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane with an epoxy group in a molecular chain is used as a silane coupling agent, and the coating is a yellowish transparent liquid with a boiling point of 260-262 ℃, a density of 1.07g/ml, a refractive index of 1.426 and a content of more than or equal to 97 percent.
Particularly, the silica aerogel particles are products of Tianjin Morgan Kunje high and new technology development Limited company; the phenolic derivative type nonionic hyperdispersant is a product of marine chemistry with the model number DP 2883; the phosphate anionic dispersant is a product of a marine chemical industry with the model number DP 2195; the polyurethane thickener is a product of a marine wetting chemical industry with the model of TU 2881; the organosilicon pH value regulator is a product with the model number of BS168 produced by Wake company; the waterborne polyurethane resin is a product with a PUD885 model in the full-scale chemical production; the film-forming auxiliary agent is a product of Dow chemical type DPnB; the organic silicon defoaming agent is a product with a model number of BYK028 produced by Picker chemical company; the organic silicon substrate wetting agent is a product with a model Tego Wet KL245 of Digao chemical company; the organic silicon leveling agent is a product with a Silok350 model produced by Stokes chemical company; the preservative is a BT-type product produced by Hofmann chemical company; the silane coupling agent is a product of the Nanjing Pining coupling agent company with the model number of KH 560.
The components and weights of examples 1-3 and comparative examples 1-2 are shown in Table I; the dispersant of the silica aerogel aqueous dispersion in the component A of the comparative example 1 does not use the phenolic derivative type nonionic hyper-dispersant and the phosphate type anionic dispersant, and only uses the conventional polyacrylic ammonium salt dispersant; the component B of comparative example 2 does not use gamma- (2, 3-glycidoxy) propyltrimethoxysilane as a coupling agent, and aminopropyltriethoxysilane as a coupling agent; the test results of examples 1 to 3 and comparative examples 1 to 2 are shown in Table two.
Watch 1
Figure GDA0002645852380000091
Example 1
Step one, preparing a silicon dioxide aerogel water dispersion;
adding 62.5kg of deionized water into a pre-dispersion cylinder, starting stirring, adding 3.2kg of phenolic derivative type nonionic hyper-dispersant of DP2881 in the marine lubricating chemical industry under stirring, stirring and mixing for 10min after adding, then adding 32kg of silicon dioxide aerogel particles of Tianjin Morgan Kuntze high and new technology development Limited company under the rotation speed of 300-500 r/min, pre-dispersing for 10-20 min, then sequentially adding 1.6kg of phosphate anionic dispersant of DP2195 in the marine lubricating chemical industry, 0.6kg of polyurethane thickener of TU2881 in the marine lubricating chemical industry, 0.1kg of organosilicon pH regulator of BS168 in the Wacker company, stirring and increasing the stirring speed to 1400-1600 r/min for high-speed dispersion for 30min after adding, and grinding for 1.5-2.5 h by a pin type sand mill for use in the second step.
Step two, preparing A component of aerogel water-based bi-component transparent sound insulation coating
69kg of waterborne polyurethane resin with a pending chemical model of PUD885 is weighed in a production cylinder, then 5.0kg of film-forming additive with a Dow chemical model of DPnB, 0.2kg of organosilicon defoamer with a BYK028 chemical model of Pico, 0.4kg of organosilicon wetting agent with a Tego Wet KL245 model of Digao and 0.3kg of organosilicon leveling agent with a Silok350 model of Silok are sequentially added under stirring, after the addition is finished, the mixture is stirred at a rotating speed of 400-600 rpm for 5-15 min until the mixture is uniform, then 25kg of silicon dioxide aerogel water dispersion prepared in the first step of the embodiment and 0.1kg of preservative with a Hoffman chemical model of BT are sequentially added, and finally the mixture is stirred at a rotating speed of 400-600 rpm for 20min until the mixture is uniform, thus obtaining a component A finished product of the aerogel waterborne two-component transparent sound insulation coating.
Step three, preparing aerogel water-based two-component transparent sound insulation coating
And (2) taking a silane coupling agent with the model number of KH560 of Nanjing Pining company as a component B, weighing 1.5kg of the component B, diluting with 1.5kg of clear water, adding into 100kg of the component A of the aerogel aqueous two-component transparent sound insulation coating prepared in the second step, stirring at the rotating speed of 100-300 r/min for 5-15 min to be uniform after adding, coating the component A on the surface of glass by adopting a spraying process, drying the surface for 25-35 min, and baking at the temperature of 130-150 ℃ for 15-25 min to form a coating of the aerogel aqueous two-component transparent sound insulation coating with sound insulation performance. The performance test results are shown in the corresponding data of example 1 in table two.
Example 2
The procedure of example 1 was repeated except that 2kg of the B component was used in the fourth step, diluted with 2kg of clear water and added to the A component. The performance test results are shown in the corresponding data of example 2 in table two.
Example 3
The procedure described in example 1 was repeated except that 2kg of the B component was used in step four and diluted with 2kg of clear water and added to the A component, with the components weighed out as in example 3 of Table I. The performance test results are shown in the corresponding data of example 3 in table two.
Comparative example 1
Step one, preparing a silicon dioxide aerogel water dispersion;
adding 64.5kg of deionized water into a pre-dispersion cylinder, starting stirring, adding 4.5kg of a commercially available polyacrylic ammonium salt dispersant under stirring, stirring and mixing for 10min after adding, then adding 30kg of silicon dioxide aerogel particles of Tianjin Morgan Kundze high and new technology development Limited company under the rotation speed of 400 r/min, pre-dispersing for 15min, then sequentially adding 0.8kg of polyurethane thickener of TU2881 in the marine lubrication industry and 0.2kg of organosilicon pH regulator of BS168 in the Wake company under stirring, stirring and increasing the stirring speed to 1500 r/min for high-speed dispersion for 30min after adding, and then grinding for 2h by using a pin type sand mill for use in the second step.
Step two, preparing A component of aerogel water-based bi-component transparent sound insulation coating
71kg of waterborne polyurethane resin with a chemical model of PUD885 is weighed and added into a production cylinder, then 5.35kg of film-forming additive with a chemical model of DPnB of Dow, 0.3kg of organosilicon defoamer with a chemical model of BYK028 of Picko, 0.3kg of organosilicon wetting agent with a chemical model of Tego Wet KL245 of Digao and 0.4kg of organosilicon leveling agent with a chemical model of Silok350 of Silok are sequentially added into the production cylinder, the production cylinder is stirred for 10min to be uniform at the rotating speed of 500 r/min, then 22.5kg of silicon dioxide aerogel aqueous dispersion prepared in the first step of the embodiment and 0.15kg of preservative with a chemical model of BT of Hofmann are sequentially added, and finally the production cylinder is stirred for 20min to be uniform at the rotating speed of 500 r/min to obtain a component A finished product of the aerogel bi-component waterborne sound insulation coating.
Step three, preparing aerogel water-based two-component transparent sound insulation coating
And (2) taking a silane coupling agent of south Beijing Pining company with the model number of KH560 as a coupling agent (component B), weighing 2kg of the component B, diluting with 2kg of clear water, adding into 100kg of the component A of the aerogel water-based two-component transparent sound insulation coating prepared in the second step, stirring at the rotating speed of 200 revolutions per minute for 10min to be uniform after adding, applying to the surface of the glass by adopting a spraying process, and baking at the temperature of 130-150 ℃ for 20min after drying for 30 min.
Comparative example 2
Step one, preparing a silicon dioxide aerogel water dispersion;
adding 64.5kg of deionized water into a pre-dispersion cylinder, starting stirring, adding 3.0kg of phenolic derivative type nonionic hyper-dispersant of DP2881 in the marine lubricating chemical industry under stirring, stirring and mixing for 5-15 min after adding, adding 30kg of silicon dioxide aerogel particles of Tianjin Morgan Kunjun high and new technology development Limited company under the rotation speed of 300-500 r/min, pre-dispersing for 10-20 min, then sequentially adding 1.5kg of phosphate anionic dispersant of DP2195 in the marine lubricating chemical industry, 0.8kg of polyurethane thickener of TU2881 in the marine lubricating chemical industry, 0.2kg of organosilicon pH regulator of BS168 in the Wack company, stirring and increasing the stirring speed to 1400-1600 r/min for high-speed dispersion for 25-35 min after adding, and grinding for 2h by using a rod-pin type sand mill for the second step.
Step two, preparing A component of aerogel water-based bi-component transparent sound insulation coating
71kg of waterborne polyurethane resin with a chemical model of PUD885 is weighed and added into a production cylinder, then 5.35kg of film-forming additive with a chemical model of DPnB of Dow, 0.3kg of organosilicon defoamer with a chemical model of BYK028 of Picko, 0.3kg of organosilicon wetting agent with a chemical model of Tego Wet KL245 of Digao and 0.4kg of organosilicon leveling agent with a chemical model of Silok350 of Silok are sequentially added into the production cylinder, the production cylinder is stirred for 10min to be uniform at the rotating speed of 500 r/min, then 22.5kg of silicon dioxide aerogel aqueous dispersion prepared in the first step of the embodiment and 0.15kg of preservative with a chemical model of BT of Hofmann are sequentially added, and finally the production cylinder is stirred for 20min to be uniform at the rotating speed of 500 r/min to obtain a component A finished product of the aerogel bi-component waterborne sound insulation coating.
Step three, preparing aerogel water-based two-component transparent sound insulation coating
And (2) taking a silane coupling agent with the Dow Corning company model number of Z-6011 as a crosslinking agent (component B), weighing 2kg of the component B, diluting with 2kg of clear water, adding into 100kg of the aerogel aqueous two-component transparent sound insulation coating (component A) prepared in the second step, stirring at the rotating speed of 200 revolutions per minute for 10min to be uniform after adding, applying to the surface of the glass by adopting a spraying process, and baking at 130-150 ℃ for 20min after drying for 30 min.
Watch two
Figure GDA0002645852380000141
From the results in the table two, it can be seen that the aerogel aqueous two-component transparent sound insulation coating prepared in embodiments 1 to 3 of the present invention adopts the phenolic derivative type nonionic hyper-dispersant having the pigment affinity group and the extremely strong anchoring group to perform surface modification on the silica aerogel particles in the comparative ratio 1, and meanwhile, the phosphate anionic dispersant is matched to improve the dispersibility and the easy aggregation characteristic of the silica aerogel powder in the aqueous medium, so that the dispersibility and the stability of the aerogel in the aqueous coating are improved, and the problem of easy aggregation and aggregation of the aerogel is solved. Compared with the comparative proportion 2, because the gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane with the epoxy group in the molecular chain is adopted as the coupling agent to coat the silicon dioxide aerogel particles, the particles are fully crosslinked and reacted with the aqueous polyurethane resin in the drying film forming process, and are chemically bonded with silanol groups on the surface of the glass to form covalent bonds, a firm interpenetrating network three-dimensional crosslinking structure of an organic matrix, a silane coupling agent and an inorganic matrix is formed, the aerogel sound insulation coating is ensured to be firmly attached to the surface of the glass, the problem that the addition of the silicon dioxide aerogel influences the attachment of the coating on the glass is solved, and the durable use effect is ensured. The silane coupling agent adopted in the comparative example 2 is gamma-aminopropyltriethoxysilane, and no epoxy group is provided in the molecular chain, so that silica aerogel cannot be effectively coated, the adhesion to glass is relatively poor, and the paint film adhesion and other properties are affected.

Claims (10)

1. The aerogel water-based two-component transparent sound insulation coating is characterized by being prepared by mixing the following components in parts by weight:
the component A comprises: 69-73 parts of aqueous polyurethane resin, 5.0-5.7 parts of film-forming additive, 0.2-0.4 part of organic silicon defoamer, 0.2-0.4 part of organic silicon substrate wetting agent, 0.3-0.5 part of organic silicon flatting agent, 20-25 parts of silicon dioxide aerogel aqueous dispersion and 0.1-0.2 part of preservative;
and B component: a silane coupling agent having an epoxy structure;
the weight ratio of the component A to the component B is that the component A: the component B is 100: 1.5-2.5;
the silicon dioxide aerogel aqueous dispersion in the component A is prepared from the following components in parts by weight: 62.5-66.6 parts of deionized water, 2.8-3.2 parts of phenolic derivative nonionic hyper-dispersant, 28-32 parts of silicon dioxide aerogel particles, 1.4-1.6 parts of phosphate anionic dispersant, 0.6-1.0 part of polyurethane thickener and 0.1-0.2 part of organosilicon pH regulator.
2. The aerogel water-based two-component transparent sound insulation coating as claimed in claim 1, wherein the component A is prepared by mixing the following components in parts by weight:
the component A comprises: 71 parts of waterborne polyurethane resin, 5.35 parts of film-forming additive, 0.3 part of organic silicon defoamer, 0.3 part of organic silicon substrate wetting agent, 0.4 part of organic silicon leveling agent, 22.5 parts of silicon dioxide aerogel aqueous dispersion and 0.15 part of preservative;
the silicon dioxide aerogel aqueous dispersion is prepared from the following components in parts by weight: 64.5 parts of deionized water, 3.0 parts of phenolic derivative nonionic hyper-dispersant, 30 parts of silicon dioxide aerogel particles, 1.5 parts of phosphate anionic dispersant, 0.8 part of polyurethane thickener and 0.2 part of organosilicon pH regulator.
3. An aerogel water-based two-component clear sound-proofing coating according to claim 1 or 2, characterized in that: the silica aerogel particles are transparent and light blue in appearance, the particle size is 1-5 mm, and the density is 70-120 kg/m3Porosity of>96.5 percent, and the specific surface area is 6000 to 1000m2The total pore volume is 2.0-4.2 cc/g, the average pore diameter is 20.9nm, and the thermal conductivity coefficient at 25 ℃ is 0.016W/m.k; the phenolic derivative nonionic hyper-dispersant is colorless to light yellow viscous liquid in appearance, and the density of the phenolic derivative nonionic hyper-dispersant is 1.04-1.1 g/cm3The phosphate anionic dispersant is light yellow or red brown viscous liquid with the density of 1.09-1.17 g/cm3(ii) a The polyurethane thickener is nonionic association type, is a milky semitransparent slightly turbid liquid, has the solid content of 19-21 percent, the pH value of 5.5-8.5 and the density of 1.0-1.08 g/cm3(ii) a The organosilicon pH regulator is organosilicon potassium salt, is colorless clear or slightly turbid liquid in appearance, has a solid content of 55 percent and a density of 1.4g/cm3The pH value is 13-14.
4. The aerogel water-based two-component transparent sound-proofing coating of claim 1, wherein: the appearance of the waterborne polyurethane resin is white emulsion, the solid content is more than or equal to 35 percent, the pH value is 7-8, and the hardness is more than or equal to H; the film-forming assistant is dipropylene glycol n-butyl ether and colorless transparent liquid, the solubility of the film-forming assistant in water is 5% at the temperature of 20 ℃, and the refractive index of the film-forming assistant is 1.425; the organic silicon defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and foam breaking polysiloxane, and the non-volatile content is more than 98 percent; the organic silicon base material wetting agent is polysiloxane/polyether copolymer, the appearance is transparent liquid, and the active matter content is 100%; the organic silicon flatting agent is polyether modified polydimethylsiloxane, the appearance of the organic silicon flatting agent is amber transparent liquid, and the solid content of the organic silicon flatting agent is more than or equal to 95 percent; the preservative is a high-temperature-resistant high-pH-value in-tank preservative, the active ingredient is benzisothiazolinone, the content of the active ingredient is more than 9.5%, and the pH value is 9-10.
5. An aerogel water-based two-component clear sound insulating coating according to claim 1, wherein: the silane coupling agent with the epoxy structure is gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, is a yellowish transparent liquid, has a boiling point of 260-262 ℃, a density of 1.07g/mL, and a refractive index of 1.426.
6. An aerogel water-based two-component clear sound insulating coating according to claim 1, wherein: the silicon dioxide aerogel particles are products of Tianjin Morgan Kunje high and new technology development limited company; the phenolic derivative type nonionic hyperdispersant is a product of marine chemistry with the model number DP 2883; the phosphate anionic dispersant is a product of a marine chemical industry with the model number DP 2195; the polyurethane thickener is a product of a marine wetting chemical industry with the model of TU 2881; the organic silicon pH regulator is a product with the model number of BS168 produced by Wake company; the waterborne polyurethane resin is a product with a PUD885 model in the full-scale chemical production; the film-forming auxiliary agent is a product of Dow chemical type DPnB; the organic silicon defoaming agent is a product with a model number of BYK028 produced by Picker chemical company; the organic silicon substrate wetting agent is a product with a model Tego Wet KL245 of Digao chemical company; the organic silicon leveling agent is a product with a Silok350 model produced by Stokes chemical company; the preservative is a BT-type product produced by Hofmann chemical company; the silane coupling agent is a product of the Nanjing Pining coupling agent company with the model number of KH 560.
7. The aerogel water-based two-component transparent sound-proofing coating of claim 1, wherein: the weight ratio of the component A to the component B is that the component A: and the component B is 100: 2.
8. The method of preparing an aerogel aqueous two-component clear sound insulating coating of claim 1, comprising the steps of:
step one, preparing a silicon dioxide aerogel water dispersion;
adding deionized water into a pre-dispersion cylinder, adding a phenolic derivative type nonionic hyper-dispersant under stirring, stirring and mixing for 5-15 min, then adding silicon dioxide aerogel particles at the rotating speed of 300-500 r/min, pre-dispersing for 10-20 min, then sequentially adding a phosphate type anionic dispersant, a polyurethane thickener and an organic silicon pH regulator under stirring, stirring for 25-35 min at the rotating speed of 1400-1600 r/min until the materials are uniformly dispersed, and grinding for 1.5-2.5 h by using a sand mill to prepare silicon dioxide aqueous dispersion aerogel for use in the second step;
step two, preparing a component A:
adding waterborne polyurethane resin into a production cylinder, then sequentially adding a film-forming aid, an organic silicon defoaming agent, an organic silicon base material wetting agent and an organic silicon leveling agent under stirring, stirring at the rotating speed of 400-600 revolutions per minute for 5-15 min to be uniform after adding, then sequentially adding the silicon dioxide aerogel aqueous dispersion prepared in the first step and a preservative, and finally stirring at the rotating speed of 400-600 revolutions per minute for 15-25 min to be uniform to obtain a component A finished product;
step three, preparing aerogel water-based two-component transparent sound insulation coating
And (3) adding deionized water with the same mass into the finished product of the silane coupling agent of the component B for dilution, then adding the diluted product into the component A prepared in the step two, and stirring the mixture for 5 to 15 minutes at the rotating speed of 100 to 300 revolutions per minute until the mixture is uniform to prepare the aerogel water-based two-component transparent sound insulation coating.
9. The method for preparing an aerogel water-based two-component transparent soundproof coating according to claim 8, wherein: 71 parts of aqueous polyurethane resin in the component A, 5.35 parts of film-forming additive, 0.3 part of organic silicon defoamer, 0.3 part of organic silicon substrate wetting agent, 0.4 part of organic silicon flatting agent, 22.5 parts of silicon dioxide aerogel aqueous dispersion and 0.15 part of preservative; 64.5 parts of deionized water, 3.0 parts of phenolic derivative nonionic hyper-dispersant, 30 parts of silicon dioxide aerogel particles, 1.5 parts of phosphate anionic dispersant, 0.8 part of polyurethane thickener and 0.2 part of organosilicon pH regulator in the silicon dioxide aerogel aqueous dispersion; the weight ratio of the component A to the component B is that the component A: and the component B is 100: 2.
10. The method of using an aerogel water-based two-component clear sound-proofing coating according to claim 1, wherein: firstly, mixing the component B and deionized water according to the mass ratio of 1:1, adding the mixture into the component A, uniformly stirring, coating the mixture on the surface of glass by adopting a spraying process, drying the surface of the glass for 25-35 min, and then baking the glass for 15-25 min at 130-150 ℃ to form a coating of the aerogel water-based two-component transparent sound-insulation coating with sound insulation performance.
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