CN107034678B - A kind of polyurethane and aerosil composite insulation material and preparation method - Google Patents
A kind of polyurethane and aerosil composite insulation material and preparation method Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
- D06M15/568—Reaction products of isocyanates with polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
- C08G18/6644—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
- C08G18/6677—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203 having at least three hydroxy groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
- D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
- D06M15/572—Reaction products of isocyanates with polyesters or polyesteramides
Abstract
The present invention relates to the preparations of a kind of polyurethane and aerosil composite insulation material, polyurethane colloidal sol is obtained by the way that polyurethane prepolymer is partial cross-linked first, secondly silicon dioxide gel is infiltrated after the gel (hereinafter referred to as glass fiber felt Silica hydrogel) formed after glass fiber felt immerses polyurethane colloidal sol makes polyurethane colloidal sol be converted into gel, the plural gel (hereinafter referred to as polyurethane composite silica gel) of glass fiber felt Silica hydrogel and polyurethane is obtained, polyurethane and aerosil composite insulation material are finally made using constant pressure and dry or supercritical drying.The material solves the problems, such as its picking, keeps the use process of aerogel blanket more environment-friendly and safer while keeping aerosil felt heat-insulating property.
Description
Technical field
The invention belongs to the complex techniques of aerogel insulating material, and in particular to what one kind did not lost powder, it is led in insulation
The production method for the insulation aerogel composite that domain is widely used.
Background technique
Aeroge is a kind of high porosity, the nanoporous lightweight material full of gaseous state decentralized medium, extremely-low density in hole
Material, special nano-porous structure make it have the very low coefficient of heat conduction, refractive index and propagation coefficient, these exclusive property
Matter makes aerogel material receive very high attention rate.
For aeroge porosity up to 90% or more, bore hole size 1-100nm, low-density range is 3-500kg/m3, high ratio
Surface area 200-1000m2/g, the thermal coefficient under normal temperature and pressure is lower than 0.013W/mK, than the thermal conductivity of still air
(0.025W/mK) is also low, is a kind of typical super insulating material, is the current minimum solid material of thermal conductivity in the world.
However, since its porosity is high, leading to its intensity and toughness all for general silica aerogel material
It is relatively low, therefore silica aerogel material need to be enhanced and can just make its normal use.Most schemes is applied now
It is using fiber as load material, aerosil carries out compound as functional base, this scheme is in the whole world
It gets the nod in range, solves the problems, such as that aeroge and its frangible and mechanical property are bad.At home, since 2012,
The industry for having there are many enterprises to enter aerosil adiabatic heat-insulation in succession.
After glass fibre and silica are compound, although the mechanical property and toughness of aeroge greatly improved, due to
The segmentation of fiber acts on, in the surface and gap that most of aeroge is all deposited in fiber in the form of nanometer is short grained, in reality
In the application of border, these little particles are highly susceptible to the effect of external force and drop out, and nano particle not only will cause after human body sucks
It is potentially hazardous, and falling off with particle, the performance of Aerogel substrates also will receive influence.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of aerosil composite insulation material；Keep aeroge exhausted
The picking rate of hot material substantially reduces.The specific technical proposal is:
(1) preparation of polyurethane prepolymer solution
By polyethers or polyester polyol certain vacuum degree and at a temperature of be dehydrated.It will be dewatered according to certain proportion
In organic solvent, catalyst, at a certain temperature pre-polymerization is added in polyethers or polyester polyol and diisocyanate mixed dissolution
1-2 hours, obtain pre-polymer solution.
(2) preparation of polyurethane colloidal sol
The polyol compound that a certain amount of degree of functionality is more than or equal to three is added in pre-polymer solution, makes performed polymer end group
Isocyanate group (- NCO) and alcoholic extract hydroxyl group carry out partial cross-linked formation colloidal sol.
(3) preparation of glass fiber felt Silica hydrogel
Ethyl orthosilicate, 3- aminopropyl triethoxysilane and formamide are mixed, after mixing be added water and
Acetonitrile is added dropwise certain hydrochloric acid and starts to hydrolyze, and ammonium hydroxide is added dropwise after hydrolysis again, immerses glass mat, forms the compound dioxy of glass fiber felt
Gel felt is put into baking oven under certain temperature aging 4-6 hours by the gel of SiClx.It is soaked after gel aging using organic solvent
Bubble carries out solvent displacement.
(4) glass fiber felt Silica hydrogel and polyurethane gle is compound
Glass fiber felt Silica hydrogel made from above-mentioned (3) is immersed in polyurethane colloidal sol made from above-mentioned (2), a certain amount of urge is added
Agent makes polyurethane colloidal sol be converted into gel at 40-60 DEG C, obtains polyurethane composite silica gel.
(5) by polyurethane composite silica gel in normal pressure or CO2Overcritical lower drying to get arrive silica and polyurethane
The composite insulation material of aeroge.
In the present invention, the mol ratio of step (1) diisocyanate and polyalcohol is 1.5-3.5, and solution concentration is
20%-70%, temperature be 30-60 DEG C, solvent be can be acetone, ethyl acetate, methylene chloride, acetonitrile etc..Polyethers and polyester polyols
Alcohol can be polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polytetrahydrofuran diol, polyester polyol 3152, polyester polyol
3150-6, polyester polyol AD-60, polyester polyol HC-0924 etc., isocyanates can be toluene di-isocyanate(TDI), diphenyl
Methane diisocyanate, isophorone diisocyanate etc., catalyst can be organic amine, organic metal salt etc., such as triethylamine, three
Ethylene diamine, stannous octoate, dibutyl tin dilaurate, stannous oleate etc..
In the present invention, polyol compound of the degree of functionality described in step (2) more than or equal to three can be glycerine, three hydroxyl first
Base propane, pentaerythrite etc..
In the present invention, step (3) described ethyl orthosilicate: 3- aminopropyl triethoxysilane: formamide: water: acetonitrile
Ratio (mass ratio) are as follows: (1.5-4): (0.05-1): (0.5-3): 1:(6-15), aging temperature is 40-80 DEG C.
In the present invention, step (5) described drying mode can be constant pressure and dry or CO2Supercritical drying, constant pressure and dry temperature
It is 50-100 DEG C, supercritical drying temperature is 20-50 DEG C, pressure 10-20MPa.
The preparation method of the polyurethane-modified aerosil composite insulation material of the present invention is suitable for rule convenient for operation
Modelling production, simple process；It reduces the picking rate of aerosil felt material obvious, overcomes aerogel blanket construction not
Conveniently, dust has the shortcomings that human body potentially hazardous, while thermal coefficient and density are not decreased obviously.
Specific embodiment
The present invention is made a more thorough explanation below with embodiment.The present invention can be presented as a variety of different forms,
It should not be construed as limited to the exemplary embodiments described herein.
Embodiment 1
By PEG temperature be 100 DEG C, vacuum degree be 0.08MPa under be dehydrated.PEG and MDI are diluted with acetone respectively, it is molten
Liquid concentration should control between %30-50%；Solution concentration is 40% in embodiment.Under nitrogen protection, indifferent gas can also be selected
Body measures two kinds of solution as protective gas, in the ratio that the molar ratio of isocyano and hydroxyl is 1.5, after dilution
PEG is added dropwise in MDI solution, is added the triethylene diamine catalyst of solution gross mass 0.5%, is started pre-polymerization at 40 DEG C, often
Isocyano-content is measured by sampling every 30min, until isocyano-content is that pre-polymerization is completed close to theoretical value.Pre-polymerization is completed
Afterwards, glycerine is added in prepolymer to be crosslinked, amount of hydroxyl groups and the molar ratio of remaining isocyano should control in glycerine
Between 0.6-0.9:1, polyurethane colloidal sol is obtained.
Successively ethyl orthosilicate, APTES, formamide are mixed, water and acetonitrile are added after mixing, ethyl orthosilicate:
APTES: formamide: prepolymer: water: acetonitrile=2.2: 0.8: 2:0.7:1: 8(mass ratio), concentrated hydrochloric acid is added dropwise after mixing
Start to hydrolyze to pH=2 of solution afterwards, ammonium hydroxide is added dropwise to pH=7 of solution, after immersing glass mat gel in hydrolysis again after 1 hour
6 hours of aging at 50 DEG C are impregnated using ethyl acetate after gel aging and carry out solvent displacement generation glass fiber felt Silica hydrogel.
Ethyl orthosilicate can use other silicon sources, such as industrial waterglass, industry silicasol, methyl orthosilicate, methyl trimethoxy
Oxysilane, methyltriethoxysilane etc. replace.
Acetonitrile can use other organic solvents, such as methanol, ethyl alcohol, propyl alcohol or isopropanol to replace.
Formamide can use other drying control chemical additives, such as acetamide, n,N-Dimethylformamide, N, N- diformazan
Yl acetamide, glycerine, ethylene glycol, oxalic acid etc. replace.
Concentrated hydrochloric acid can be replaced with sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, ethanedioic acid；Ammonium hydroxide can also use ammonium hydroxide, hydroxide
Sodium, potassium hydroxide etc. replace.
Glass fiber felt Silica hydrogel is immersed in polyurethane colloidal sol, dibutyltin dilaurate catalyst is added, makes at 50 DEG C
Polyurethane colloidal sol is converted into gel, obtains polyurethane composite silica gel.Gel is dried to arrive silica and gather at 80 DEG C
The composite insulation material of urethane aeroge.The picking rate of material is tested using vibration sieve instrument, the picking rate decline of new material
To 0.1-0.2%, and the picking rate of unmodified aerosil felt is 1-1.5% after tested；As it can be seen that new material achieves
Significantly prevent the effect of picking.
Embodiment 2
By PPG temperature be 110 DEG C, vacuum degree be 0.08MPa under be dehydrated.It is respectively that PPG and TDI ethyl acetate is dilute
It releases, solution concentration 40%, concentration range can be between 20%-70%.The molar ratio of isocyano and hydroxyl is 2, in nitrogen
Under protection, the PPG after dilution is added dropwise in TDI, adds the dibutyl tin dilaurate catalyst of solution gross mass 0.5%,
Start pre-polymerization at 25-50 DEG C, isocyano-content is measured by sampling every 30min, until isocyano-content is close to theoretical value
As pre-polymerization is completed.After the completion of pre-polymerization, trimethylolpropane is added in prepolymer and is crosslinked, hydroxyl in trimethylolpropane
Amount and the molar ratio of remaining isocyano are 0.6-0.9:1, obtain polyurethane colloidal sol.
Successively the prepolymer after ethyl orthosilicate, formamide and crosslinking is mixed, water and ethyl alcohol are added after mixing, just
Silester: formamide: prepolymer: water: ethyl alcohol=2.2: 2:0.9:1: 8(mass ratio), after concentrated hydrochloric acid is added dropwise after mixing
Start to hydrolyze to pH=2 of solution, ammonium hydroxide is added dropwise to pH=8 of solution in hydrolysis again after 1 hour, immerse after glass mat gel
5 hours of aging at 60 DEG C are impregnated using ethyl acetate after gel aging and carry out solvent displacement.
Glass fiber felt Silica hydrogel is immersed in polyurethane colloidal sol, dibutyltin dilaurate catalyst is added, makes at 50 DEG C
Polyurethane colloidal sol is converted into gel, obtains polyurethane composite silica gel.Gel is 45 DEG C in temperature, and pressure is to carry out under 15MPa
CO2Supercritical drying is to get the composite insulation material for arriving silica and polyurethane aeroge.Material is fallen using vibration sieve instrument
Powder rate is tested, and the picking rate of new material drops to 0.1-0.2%.
Embodiment 3
By polyester polyol 3152 temperature be 100 DEG C, vacuum degree be 0.08MPa under be dehydrated.Respectively by polyester polyol
3152 and MDI is diluted with methylene chloride, solution concentration 30-50%, and the molar ratio of isocyano and hydroxyl is 3, is protected in nitrogen
Under shield, the polyester polyol 3152 after dilution is added dropwise in MDI, adds the dilaurate dibutyl of solution gross mass 0.5%
Tin catalyst starts pre-polymerization at 25-50 DEG C, isocyano-content is measured by sampling every 30min, until isocyano-content connects
Nearly theoretical value is that pre-polymerization is completed.After the completion of pre-polymerization, trimethylolpropane is added in prepolymer and is crosslinked, trihydroxy methyl third
The molar ratio of amount of hydroxyl groups and remaining isocyano is 0.6-0.9:1 in alkane, obtains polyurethane colloidal sol.
Successively by ethyl orthosilicate, APTES, formamide and crosslinking after prepolymer mix, after mixing be added water and
Acetonitrile, ethyl orthosilicate: APTES: formamide: prepolymer: water: acetonitrile=2.2: 0.1: 1.5:1.5:1: 10(mass
Than), it being added dropwise after mixing after concentrated hydrochloric acid and starts to hydrolyze to pH=2 of solution, ammonium hydroxide is added dropwise to pH=8 of solution in hydrolysis again after 1 hour,
Immerse glass mat gel after at 60 DEG C 6 hours of aging, after gel aging using ethyl acetate impregnate carry out solvent set
It changes.
Glass fiber felt Silica hydrogel is immersed in polyurethane colloidal sol, dibutyltin dilaurate catalyst is added, makes at 50 DEG C
Polyurethane colloidal sol is converted into gel, obtains polyurethane composite silica gel.Gel is 40 DEG C in temperature, and pressure is to carry out under 20MPa
CO2Supercritical drying is to get the composite insulation material for arriving silica and polyurethane aeroge.Material is fallen using vibration sieve instrument
Powder rate is tested, and the picking rate of new material drops to 0.1-0.2%.
In above-described embodiment, ethyl orthosilicate can use other silicon sources, such as industrial waterglass, industry silicasol, positive silicic acid
Methyl esters, methyltrimethoxysilane, methyltriethoxysilane etc. replace.Silicon source, 3- aminopropyl triethoxysilane, dry control
Chemical addition agent, water and organic solvent processed should be controlled in mass ratio at (1.5-4): (0.05-1): (0.5-3): 1:(6-15)
In range.
Acetonitrile can use other organic solvents, such as methanol, ethyl alcohol, propyl alcohol or isopropanol to replace.
Formamide can use other drying control chemical additives, such as acetamide, n,N-Dimethylformamide, N, N- diformazan
Yl acetamide, glycerine, ethylene glycol, oxalic acid etc. replace.
Concentrated hydrochloric acid can use other acid catalysts, as sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, ethanedioic acid replace；Ammonium hydroxide can also
To be replaced with other base catalysts, such as ammonium hydroxide, sodium hydroxide, potassium hydroxide.
Present invention has the advantage that
(1) present invention is suitable for large-scale production, simple process convenient for operation.
(2) present invention is used for the primary raw material polyalcohol of polyurethane and the compound aerogel insulating material of silica, different
Cyanate is conveniently easy to get, cheap.
(3) present invention is reduced the picking rate of aerosil felt material obvious, overcomes aerogel blanket construction not
Conveniently, dust has the shortcomings that human body potentially hazardous, while thermal coefficient and density are not decreased obviously.
Above-mentioned example is only intended to illustrate the present invention, and in addition to this, also there are many different embodiments, and these are implemented
Mode be all those skilled in the art after comprehension inventive concept it is also envisioned that therefore, will not enumerate herein.
Claims (9)
1. the preparation method of a kind of silica and polyurethane aeroge composite insulation material, it is characterised in that including following step
It is rapid:
1) polyurethane colloidal sol and glass fiber felt Silica hydrogel are prepared respectively；
Wherein, the step of preparing polyurethane colloidal sol are as follows:
A1) polyethers or polyester polyol are dehydrated at a temperature of between vacuum degree is not less than 0.08MPa and 100 DEG C -110 DEG C；
A2 be) (1.5-3.5) according to mol ratio with dewatered polyethers or polyester polyol by diisocyanate: 1 mixes, molten
Solution in organic solvent, is added catalyst and obtains pre-polymer solution pre-polymerization 1-2 hours at a temperature of 30-60 DEG C；
A3 the polyol compound that degree of functionality is more than or equal to three, the isocyanide of performed polymer end group) are added in the pre-polymer solution
The molar ratio of acidic group (- NCO) and alcoholic extract hydroxyl group is greater than 1 and carries out being cross-linked to form colloidal sol；
The step of preparing glass fiber felt Silica hydrogel are as follows:
B1) in mass ratio by silicon source, 3- aminopropyl triethoxysilane, drying control chemical additive, water and organic solvent
(1.5-4): (0.05-1): (0.5-3): 1:(6-15) it weighs respectively；
B2) first silicon source, 3- aminopropyl triethoxysilane (APTES) and drying control chemical additive are mixed；
B3) after mixing, water and organic solvent are added；
B4 acid catalyst) is added dropwise to start to hydrolyze, by pH value adjustment between 1.5-3；
B5 base catalyst is added dropwise again after) hydrolyzing 1-2 hours, by pH value adjustment between 7.5-9；
B6 glass mat) is immersed, the gel felt of glass fiber felt composite silicon dioxide is formed；
B7) gel felt is put into baking oven at a temperature of 50 DEG C -60 DEG C aging 4-6 hours；
B8 it) is impregnated using organic solvent and carries out solvent displacement；
2) the glass fiber felt Silica hydrogel is immersed in the polyurethane colloidal sol, adds catalyst, keeps polyurethane molten at 40-60 DEG C
Glue is converted into gel, obtains polyurethane Silica hydrogel；
3) by polyurethane Silica hydrogel in normal pressure or CO2Overcritical lower drying is to get answering to silica and polyurethane aeroge
Close heat-insulating material.
2. preparation method as described in claim 1, which is characterized in that the diisocyanate and the polyethers or polyester polyols
Alcoholic solution concentration is 20%-70%, and the organic solvent is one of acetone, ethyl acetate, methylene chloride, acetonitrile.
3. preparation method as described in claim 1, which is characterized in that the polyester polyol be polyethylene glycol, polypropylene glycol,
Polytetramethylene glycol, polytetrahydrofuran diol, polyester polyol 3152, polyester polyol 3150-6, polyester polyol AD-60, polyester
One of polyalcohol HC-0924.
4. preparation method as described in claim 1, which is characterized in that the isocyanates is toluene di-isocyanate(TDI), hexichol
One of dicyclohexylmethane diisocyanate, isophorone diisocyanate.
5. preparation method as described in claim 1, which is characterized in that the catalyst is organic amine or organic metal salt.
6. preparation method as claimed in claim 5, which is characterized in that the organic metal salt be triethylamine, triethylene diamine,
One of stannous octoate, dibutyl tin dilaurate, stannous oleate.
7. preparation method as described in claim 1, which is characterized in that the degree of functionality is more than or equal to three polyol compound
For one of glycerine, trimethylolpropane, pentaerythrite.
8. preparation method as described in claim 1, which is characterized in that the drying mode is constant pressure and dry or CO2Supercritical drying
Dry, the temperature of the constant pressure and dry is 50-100 DEG C；The CO2Supercritical drying temperature is 20-50 DEG C, pressure 10-
20MPa。
9. a kind of silica and polyurethane aeroge composite insulation material, which is characterized in that wanted using claim 1 to right
Preparation method described in asking any one of 8 is made.
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