CN108084746A - A kind of aerosil coating and preparation method thereof - Google Patents
A kind of aerosil coating and preparation method thereof Download PDFInfo
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- CN108084746A CN108084746A CN201711316600.9A CN201711316600A CN108084746A CN 108084746 A CN108084746 A CN 108084746A CN 201711316600 A CN201711316600 A CN 201711316600A CN 108084746 A CN108084746 A CN 108084746A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- 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
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Plant Pathology (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Silicon Compounds (AREA)
Abstract
The invention discloses a kind of aerosil coating and preparation method thereof, which includes following parts by weight of component：100 parts of silica wet gel, 20~50 parts of auxiliary film forming matter, 0.3~0.5 part of antimildew disinfectant, 0.1~2.0 part of thickening leveling agent, silica wet gel is taken during preparation, auxiliary film forming matter is added at a slow speed under stirring at low speed, antimildew disinfectant and thickener, stirring 30 minutes or more, add suitable distilled water or deionized water, adjusting coating viscosity in 1500mPas or so coating finished product；The present invention is directly used using concentrated gas gel colloidal as raw material, avoid the not easily disperse of aerogel powder material, also avoid the possibility that structure is destroyed after the secondary water suction of aerogel powder, simultaneously by adding in structural stabilizing agent, the problem of overcoming drying process structural collapse can also play later stage film forming procedure enhancing effect, thermal conductivity factor under film room temperature is minimum to 0.015W/mK, and film light transmittance is up to more than 80%.
Description
Technical field
The present invention relates to a kind of heat-insulated, thermal insulation materials, are specifically a kind of aerosil coating, the invention further relates to
The preparation method of above-mentioned coating.
Background technology
Aerosil be mutually assembled by colloidal particle a kind of structure-controllable formed light nanoporous it is non-
Crystalline material, is the most light solid material being currently known, the minimum density that laboratory is done at present can down to 3 kilograms/cubic metre,
Industrialized production it is basic at 10-80 kilograms/cubic metre or so.Since it is with special continuous tridimensional network, in institute
Have in solid material, its heat-proof quality is best, and acoustic propagation rate is low, and dielectric constant is low, and reference area is big, therefore extensively should
For heat preserving and insulating material, acoustic impedance coupling material, prepare efficient rechargeable battery material, catalyst and its carrier etc..Dioxy
The thermal conductivity factor of SiClx aeroge is extremely low, and (25 DEG C) thermal conductivity factor can reach 0.008W/mk under room temperature.Therefore it is widely used
To various heat preservations, heat-insulated field.Why aerogel material has very excellent heat preservation and insulation, is its special hole knot
Structure, using the various products that aeroge is made as main material, as the shaped pieces such as aerogel heat-proof blanket, heat insulation felt, thermal insulation board are wide
It is general to be applied to various industrial heat preservations, heat-insulated field.Aerogel heat-proof shallow layer (coating is less than 5 millimeters thicks), since its is excellent
Heat-proof quality and workability also begin to occupy certain market, and market prospects are very wide.
At present, aerosil coating is all using dried silicon dioxide aerogel powder, along with coating
Required water, film forming matter, coalescents, color stuffing and other auxiliary agents etc., are combined by coating producing process.It is maximum
The drawbacks of be using dried finished product aerogel powder, to be again dipped into water, hydrone can enter in aeroge gap, by
In the tension force effect of hydrone, a part of aeroge hole is destroyed, and aeroge porosity is caused to reduce, so its heat-insulation and heat-preservation
Performance is greatly reduced.Through measuring, the sample block sprayed using this aeroge coating, thermal conductivity factor only up to be accomplished
0.030W/mK (in the case where meeting coating main technique requirements, using inorganic binder as film forming matter).Publication No.
The patent document of CN103275530A discloses a kind of preparation method of aeroge coating, and thermal conductivity factor is substantially in 0.030W/
MK (inorganic binder) arrives 0.035W/mK (organic binder bond).The patent document of Publication No. CN106433270A is announced
The aeroge coating of infrared external reflection a kind of, thermal conductivity factor is worse, best for 0.038W/mK, and its matching somebody with somebody of announcing
Side's (silicon dioxide aerogel powder：Infrared reflective material：Water paint=1:0.1-1:0.05-0.15) and production technology,
Technical staff as same domain can not realize.It is well known that silicon dioxide aerogel powder belongs to the hygroscopic material of multiaperture electrode,
Under normal circumstances, 1 kilogram of airsetting rubber powder is, it is necessary to 4 kilograms or more water can just be mixed into paste body shape, and Publication No.
The patent document of CN106433270A provide in the description with when embodiment, professional can not realize at all.
The content of the invention
The object of the present invention is to provide a kind of aerosil coating, film thermal conductivity factor which is made
Low, film light transmittance is high, good heat-insulation effect.The present invention also provides the preparation method and applications of above-mentioned coating.
In order to reach above-mentioned technical purpose, the technical scheme is that：
A kind of aerosil coating, including following parts by weight of component：
100 parts of silica wet gel
20~50 parts of auxiliary film forming matter
0.3~0.5 part of antimildew disinfectant
0.1~2.0 part of thickening leveling agent
Directly, as key component, traditional aeroge coating life is avoided using without dry silica wet gel
The gap for being re-dissolved in solvent using dry aerogel powder material during production and being brought caves in, while has saved dry dioxy
The wasting of resources caused by SiClx powder.The silica wet gel is prepared by the following：Using colloidal sol, gel method
(method as disclosed in CN 103833041A patent documents) produces aerosil, before being aged after the completion of gel, adds in
γ-glycidol ether propyl trimethoxy silicane stabilizer, the γ-glycidol ether propyl trimethoxy silicane stabilizer
Addition is the 5~10% of dioxide-containing silica, is aged at 60 DEG C and obtains wet gel, to ensure the steady of aerogel pores gap structure
Determine, while the film forming of silica is participated in during the aeroge coating coating film forming, three dimensional network can be formed with silica
Shape structure.Such as the production of conventional sol-gel, soda acid two-step process (by taking CN 103833041A patent documents as an example)
Aeroge, after the completion of alkaline reaction gel is added in, add in γ-glycidol ether propyl trimethoxy silicane, normal pressure, 60 DEG C
It is lower stirring stablize 2 it is small when both silica wet gel.Due to containing some alcohols material in gel rubber system, coating is matched somebody with somebody
Other alcohols materials of freeze thawing resistance need not be added in side's design.
The auxiliary film forming matter is the one or more of Ludox, Aluminum sol or polymer resin emulsion, as excellent
Choosing, the Aluminum sol are active oxidation Aluminum sol or aluminum hydroxide sol with nano-scale, and the Ludox is with receiving
The silicon dioxide gel of meter ruler cun, the Aluminum sol, the amount of solid content of Ludox are more than 20%, pH value 6~8.It is described poly-
Polymer resin lotion is modified acrylic resin emulsion, the one or more of modified vinyl acetate resin lotion.
The specific effect of the active oxidation Aluminum sol or aluminum hydroxide sol is as follows：Activated alumina (ρ aluminium oxide)
It is one kind of the various different crystal forms of aluminium oxide, XH can be generated with water reaction2O.Al2O3, wherein X be 1,2,3 or its mixture,
Its dehydration belongs to chemical reaction, has excellent cementitiousness.Aluminum hydroxide sol belongs to a kind of high temperature phase change material (pcm), from
It is dewatered to and generates final α Al2O3, 6~7 phase transition process can be passed through, substantial amounts of heat can be absorbed, cooperate with aerosil
It plays an important role to the heat-insulated of coating.
The antimildew disinfectant is imdazole derivatives or ketone fungicide.
The thickening leveling agent is cellulose family or polyurethanes thickening leveling agent.
The preparation method of above-mentioned aerosil coating, comprises the following steps：Titanium dioxide is added in stirred tank
100 parts of silicon wet gel, under 200~300 revs/min of stirrings, 20~50 parts of auxiliary film forming matter of addition, antimildew disinfectant 0.3~
0.5 part, 0.1~2.0 part of thickening leveling agent, 200~500 revs/min are stirred 30 minutes or more, add in distilled water or deionized water
(distilled water or deionized water are preferably added to 3~5 kilograms) stirring (preferably 150 revs/min are stirred 10 minutes), adjusting coating
Viscosity 1500mPas (rotational viscometer, 12 turns of model NDJ-1,2 rotors) control coating finished product.
A kind of application of above-mentioned aerosil coating：The coating is applied using showering, dip-coating or spraying process
Object (such as metal, glass, timber or plastics etc.) surface is distributed in, each coating thickness is advisable with not sagging, when small per minor tick 2
More than.Can below 150 DEG C body surface direct spraying, there is excellent thermal and insulating performance, 1mm thickness coatings can make 150
DEG C metallic surface temperature is reduced to less than 60 DEG C.
The present invention is with conventional sol-gel, soda acid two step method (method as disclosed in CN 103833041A patent documents)
Based on the technique for producing aerosil, after the completion of lye gel reaction is added in, γ-glycidol ether propyl is added in
Trimethoxy silane stabilizer, stablize at normal pressure, 60 DEG C 2 it is small when both main material of the invention：Silica wet gel.
It is combined aeroge coating with auxiliary film forming matter, antimildew disinfectant, thickening leveling agent etc..The aeroge coating dry film heat conduction
Coefficient is less than 0.025W/mK, sprayable in body surfaces such as fabric, glass, plastics, timber, metals, play heat-insulated, heat preservation,
The purpose of protection.
The present invention is directly used using concentrated gas gel colloidal as raw material, avoids being not easy for aerogel powder material
Dispersiveness also avoids the possibility of structure destruction after the secondary water suction of aerogel powder, while by adding in structural stabilizing agent, i.e.,
The problem of overcoming drying process structural collapse can also play later stage film forming procedure enhancing effect.The painting made by the present invention
Film, thermal conductivity factor under room temperature is minimum to 0.015W/mK (GB/T22588-2008), film light transmittance up to 80% with
On, the interlayer face especially suitable for pair glass window and door is coated with, and play has better heat insulation than traditional thermal isolation film.
Specific embodiment
Embodiment 1
The preparation of silica wet gel (by taking the patent document of Publication No. CN 103833041A as an example, but is not limited to
State patent document)：The ethyl orthosilicate (TEOS) of 60L is added in the reaction kettle equipped with 200L ethyl alcohol, 200 revs/min are stirred
After mixing 30 minutes, 2.5mol/L hydrochloric acid solutions are slowly added to, adjustment solution ph is 3.5 or so.Add after continuing stirring 30 minutes
Thermal response kettle is warming up to solution temperature as 45 DEG C, when constant temperature 24 is small.It is molten that 3mol/L ammonium hydroxide is added with stirring with 200 revs/min
Liquid, adjustment system pH is 7.5 or so, after persistently stirring 15 minutes, kept in 45 DEG C of constant temperature 4 it is small when, added in stirring
(γ-glycidol ether propyl trimethoxy silicane is steady for the aqueous solution of 30% content γ-glycidol ether propyl trimethoxy silicane
Determine agent addition be dioxide-containing silica 5~10%), be warming up to 60 DEG C stablize 2 it is small when both silica wet gel.
1000 kilograms of silica wet gel is added in stirred tank, under 200 revs/min of stirrings, adds in 25% Ludox
200 kilograms, 20% 100 kilograms of active oxidation Aluminum sol, 2 kilograms of 4 kilograms of antimildew disinfectant LXE, cellulose thickener HEC
(being configured to 3% aqueous solution in advance) stirs 30 minutes or more, adds in 5 kilograms of deionized waters, and 150 revs/min are stirred 10 minutes i.e.
Into coating finished product, metal drum or plastic barrel can be used filling, 6 months shelf-lifves or more.
Ludox and Aluminum sol used produce for Qingdao city base hundred million up to silica gel chemical reagent work, antimildew disinfectant LXE and fibre
It ties up element thickener HEC to produce for DOW Chemical, other materials are technical grade commercial product.1.05 grams/ml of gained coating density glues
Spend 1100mPas, coating thermal conductivity factor 0.015W/mK
(GB/T22588-2008)。
Using high pressure airless spray equipment, 110 DEG C of metal can surfaces are sprayed at, overall thickness 1.5mm is sprayed, is used after dry
Infrared radiation thermometer measures 47 DEG C of tank surface temperature (21 DEG C of environment temperature, humidity 55%).
Embodiment 2
Silica wet gel production technology is the same as case 1.
1000 kilograms of silica wet gel is added in stirred tank, under 200 revs/min of stirrings, adds in 20% Aluminum sol
80 kilograms, 200 kilograms of the silicone modified acrylic resin lotion of model RF2072,4 kilograms of antimildew disinfectant LXE, cellulose increasing
Thick dose of 0.1 kilogram of HEC, 5 kilograms of UH-420 polyurethane thickeners, 500 revs/min are stirred 30 minutes or more, are added in 5 kilograms and are gone
Ionized water, 150 revs/min stirring 10 minutes coating finished product, can use metal drum or plastic barrel it is filling, 6 months shelf-lifves with
On.
Silicone modified acrylic resin lotion RF2072 used produces for Beijing Proview latex company, polyurethane thickener UH-
420 produce for Xu Hua Co., Ltd. of Japan.
Gained coating density 0.95 gram/ml, viscosity 1800mPas, coating thermal conductivity factor 0.021W/mK (GB/
T22588-2008)。
The coating of above-mentioned acquisition uses Air spraying machine, is sprayed on polyester-cotton blend cloth, and 60 micron thickness are sprayed per face, dry
Cloth slightly hardens afterwards, but can freely circumnutate.The lower 10 seconds clothes of lower cloth are placed in the flame of lighter not burn.
Embodiment 3
Silica wet gel production technology is the same as case 1.
1000 kilograms of silica wet gel is added in stirred tank, under 300 revs/min of stirrings, adds in 30% Ludox
60 kilograms, 150 kilograms of RF2072 silicone modified acrylic resins, 4 kilograms of antimildew disinfectant, 0.1 kilogram of cellulose thickener HEC,
5 kilograms of UH-420 polyurethane thickeners stir 30 minutes or more, add in 3 kilograms of deionized waters, and 150 revs/min are stirred 10 minutes
Coating finished product, can use metal drum or plastic barrel it is filling, 6 months shelf-lifves or more.
Silicone modified acrylic resin lotion used produces for Beijing Proview latex company, and polyurethane thickener is the Japanese rising sun
Co., Ltd. produces.Gained coating density 0.93 gram/ml, viscosity 1500mPas, coating thermal conductivity factor 0.019W/mK (GB/
T22588-2008)。
The coating of above-mentioned acquisition uses Air spraying machine, is sprayed on timber, coating layer thickness 0.1mm, and flame is used after dry
Burnt lumber surface, wood surface carbonization are not burnt.
Embodiment 4
Silica wet gel production technology is the same as case 1.
1000 kilograms of silica wet gel is added in stirred tank, under 300 revs/min of stirrings, adds in 20% Ludox
50 kilograms, 4,600 200 kilograms of elastomeric propylene acid resin lotions, 4 kilograms of antimildew disinfectant, 0.1 kilogram of cellulose thickener HEC,
3 kilograms of UH-420 polyurethane thickeners stir 30 minutes or more, add in 5 kilograms of deionized waters, and 150 revs/min are stirred 10 minutes
Coating finished product, can use metal drum or plastic barrel it is filling, 6 months shelf-lifves or more.
Elastomeric propylene acid resin lotion used is the 4600 of Henkel Corp.'s production, and polyurethane thickener is Japanese rising sun strain formula
Commercial firm produces.
Gained coating density 0.95 gram/ml, viscosity 1000mPas, coating thermal conductivity factor 0.021W/mK (GB/
T22588-2008), light transmittance is more than 81%.
The coating of above-mentioned acquisition uses showering, is coated on glass surface, 20 microns of coating layer thickness, as in hollow glass
Heat insulating coat substitutes currently used " VAE/ hollow glass microbeads heat insulation coating " (thermal conductivity factor 0.16W/mK), has non-
Normal apparent advantage.
Can be seen that aeroge coating of the present invention by aforementioned four specific implementation example has low-down lead
Hot coefficient.Since all components are all finely dispersed Nano grade particles, compared to traditional nanometer heat isolation paint or gas
Gel coating has higher realizability.Since entire coating transparency is fine, application field is also widened significantly.It is especially right
It is compound with the aeroges such as other insulating mold coatings or aeroge blanket, aerogel blanket in the heat-insulation and heat-preservation of small space equipment
Product has apparent advantage.
Above-described embodiment is not limit the invention in any way, every to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution all fall in protection scope of the present invention.
Claims (4)
1. a kind of aerosil coating, it is characterised in that including following parts by weight of component：
The auxiliary film forming matter is the one or more of Ludox, Aluminum sol or polymer resin emulsion；It is described mould proof to kill
Microbial inoculum is imdazole derivatives or ketone fungicide；The thickening leveling agent is cellulose family or polyurethanes thickening leveling agent.
2. a kind of aerosil coating according to claim 1, it is characterised in that：The Aluminum sol is with receiving
The active oxidation Aluminum sol or aluminum hydroxide sol of meter ruler cun, the amount of solid content of the Aluminum sol more than 20%, pH value 6~
8。
3. a kind of aerosil coating according to claim 1, it is characterised in that：The silica wet gel
It is prepared by the following：Aerosil is produced using colloidal sol, gel method, before being aged after the completion of gel, addition γ-
Glycidol ether propyl trimethoxy silicane stabilizer, the γ-glycidol ether propyl trimethoxy silicane stabilizer add
Enter 5~10% that amount is dioxide-containing silica, be aged at 60 DEG C and obtain wet gel.
4. according to a kind of preparation method of aerosil coating of claims 1 to 3 any one of them, it is characterised in that
Comprise the following steps：100 parts of silica wet gel is added in stirred tank, under 200~300 revs/min of stirrings, is sequentially added
20~50 parts of auxiliary film forming matter, 0.3~0.5 part of antimildew disinfectant, 0.1~2.0 part, 200~500 revs/min of thickening leveling agent
Clock stirs 30 minutes or more, adds in distilled water or deionized water adjusts viscosity and stirs evenly.
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| CN108821740A (en) * | 2018-07-20 | 2018-11-16 | 张家港市六福新材料科技有限公司 | A kind of aerosil-carbon fiber compound insulating material and preparation method thereof |
| CN109401369A (en) * | 2018-09-14 | 2019-03-01 | 湖南凯斯利新材料有限公司 | A kind of cement base heat-insulation and heat-preservation moisture gel nano hybridization ceramic coating and preparation method thereof |
| CN111234806A (en) * | 2019-12-12 | 2020-06-05 | 集美大学 | Aluminate long afterglow material, coating paint and preparation method thereof |
| CN111364239A (en) * | 2020-04-08 | 2020-07-03 | 天津纳科世纪新材料有限公司 | Silica aerogel heat preservation felt with long-acting conductivity and normal-pressure preparation method thereof |
| CN111795260A (en) * | 2020-07-20 | 2020-10-20 | 中海油安全技术服务有限公司 | LNG pipeline aerogel cold insulation construction method |
| CN112048171A (en) * | 2020-09-02 | 2020-12-08 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Polyurethane composition capable of repeatedly expanding in water and application thereof in waterstop |
| CN112159627A (en) * | 2020-07-24 | 2021-01-01 | 响水华夏特材科技发展有限公司 | Water-based heat insulation coating, preparation method thereof and method for preparing flexible waterproof heat insulation film |
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