CN108752904A - A kind of super hydrophobic polyurethane elastomer and preparation method thereof - Google Patents
A kind of super hydrophobic polyurethane elastomer and preparation method thereof Download PDFInfo
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- CN108752904A CN108752904A CN201810265775.XA CN201810265775A CN108752904A CN 108752904 A CN108752904 A CN 108752904A CN 201810265775 A CN201810265775 A CN 201810265775A CN 108752904 A CN108752904 A CN 108752904A
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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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- 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
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- 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
- C08G18/40—High-molecular-weight compounds
- C08G18/61—Polysiloxanes
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- 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
- C08G18/83—Chemically modified polymers
- C08G18/837—Chemically modified polymers by silicon containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of super hydrophobic polyurethane elastomers and preparation method thereof, are calculated with mass fraction, and raw material components composition includes 12~30 parts of isocyanates, 50~75 parts of polysiloxanes, 13~20 parts of silane coupling agent；When preparation, the base polyurethane prepolymer for use as that end is isocyanate group first is obtained by the reaction in polysiloxanes and isocyanates；Silane coupling agent and base polyurethane prepolymer for use as are then obtained by the reaction to the polyurethane of silane coupling agent sealing end；Then polyurethane particles are made under conditions of alkalinity；Super hydrophobic polyurethane elastomer finally is obtained by the reaction in polyurethane particles and base polyurethane prepolymer for use as.The synthesis technology of the super hydrophobic polyurethane elastomer of the present invention is simple, and raw material is easy to get, at low cost, tensile strength >=4MPa, elongation at break >=400%, and the contact angle of surface and water is 158 °.
Description
Technical field
The present invention relates to a kind of polyurethane elastomers, more particularly to a kind of super hydrophobic polyurethane elastomer and its preparation side
Method.
Background technology
Polyurethane is in molecular structure containing the total of the high molecular polymer for repeating carbamate groups (- NHCOO -)
Claim.Polyurethane elastomer has the excellent properties such as abrasion performance, tear-resistant, oil resistant, resistant to chemical etching and high resiliency, is widely used in
The various fields such as automobile making, communications and transportation, civil construction, footwear, synthetic leather, medical treatment, agricultural.
However, polyurethane elastomer is easy to be polluted by dust and other substances in use, it is seriously affected
Beautiful and performance.Therefore, it is to solve the problems, such as one of this most effective approach to assign the super-hydrophobic function of polyurethane elastomer.It is super thin
Water material refers to that contact angle of the water droplet on its surface is more than 150 °, and roll angle is less than 10 ° of material.Super hydrophobic material has from clear
The characteristics such as clean, anti-corrosion, anti-icing, drag reduction, have broad application prospects in daily life, industrial production and biomedicine, because
And it is greatly paid close attention to by researchers.It is commonly used for constructing satisfaction not because polyurethane performance spectrum width is wide and designability is extremely strong
With the super hydrophobic material of application requirement.In research paper " preparation of bionic super-hydrophobic silica/polyurethane composite coating and property
In energy (analogy Hua Bing, Wang Cundong, Li Ruifeng, polymer material science and engineering, 2014,30,136.) ", author is with nano-silica
The polyurethane that SiClx and different silicone contents are modified is raw material, using ethyl acetate as dispersant, using simple spraying process,
Super hydrophobic composite coating is prepared.However in coating preparation process, light nano silicon dioxide easily moves to mixing
The surface layer of object, and the poor compatibility of itself and polyurethane, thus it is easy to cause that coating structure is uneven, and performance difference is big.Recently, in
State application for a patent for invention CN 107286318A disclose a kind of super hydrophobic polyurethane coating and preparation method thereof, are by with fluorine-containing
Isocyanates, oligomer polyol and cage modle polysilsesquioxane are made for primary raw material, but this fluorine-containing material is more expensive,
Be not suitable for industrialized production.In addition, about super hydrophobic polyurethane elastomer, there are no relevant document reports.
Invention content
The present invention overcomes the disadvantages of the prior art, a kind of super hydrophobic polyurethane elastomer is provided, using typical
Sol-gel method is prepared for polyurethane particles, which can change due to the effect of Polar Amides formic acid ester group in polyurethane segment
The kind compatibility with polyurethane segment；Also long-chain containing polysiloxane in particle, thus there is certain elasticity；In addition, poly- silicon
The hydrophobicity of oxygen alkane can improve the hydrophobic performance of particle surface.
The present invention also provides a kind of super hydrophobic polyurethane method for producing elastomers, and easy to implement, raw material is easy to get, and does not have
Fluorine-containing material, of low cost, material composition is stronger with the Modulatory character of structure, is suitable for industrialized production.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions：
A kind of super hydrophobic polyurethane elastomer, in terms of mass fraction, raw material components group becomes：
12~30 parts of isocyanates
50~75 parts of polysiloxanes
13~20 parts of silane coupling agent.
Further, the isocyanates is isophorone diisocyanate, 1,6- hexamethylene diisocyanates, toluene
Diisocyanate, diphenyl methane -4,4 '-diisocyanate, benzene dimethylene diisocyanate, methylcyclohexyl diisocyanate
One in ester, tetramethylxylylene diisocyanate, HDI trimer, IPDI tripolymers, TDI tripolymers and MDI tripolymers
Kind is a variety of.
Further, the polysiloxanes is hydroxy-terminated polysiloxane, amino-terminated polysiloxanes and end hydroxy polyether
It is one or more in polysiloxanes；The molecular weight of polysiloxanes is 1000~6000g/mol.
Further, the silane coupling agent is 3- aminopropyl trimethoxysilanes, three ethoxy of N- aminoethyl -3- aminopropyls
Base silane, N- aminoethyls-γ-aminopropyltrimethoxysilane, 3- aminopropyl triethoxysilanes, (3- mercaptopropyis) three ethoxies
Any in base silane, γ-glycidyl ether oxygen propyl trimethoxy silicane, 3- glycidoxypropyltrietandysilane andysilanes
Kind or a variety of mixtures.
A kind of super hydrophobic polyurethane method for producing elastomers, which is characterized in that include the following steps：
(1) preparation of polyurethane particles：Polysiloxanes and isocyanates are mixed evenly, 60~100 DEG C of reactions 2~
10 hours, obtain the base polyurethane prepolymer for use as that end is isocyanate group；Then silane coupling agent is added in reaction system, 60
~90 DEG C are reacted 2~5 hours, and the polyurethane of silane coupling agent sealing end is obtained；Then it is dispersed in the first solvent, drips dropwise
Add ammonium hydroxide that the pH value of reaction system is made to be that 10~13,25~60 DEG C of degree react 10~24 hours, with the first solvent after the completion of reaction
Cleaning 2~4 times obtains polyurethane particles after vacuum drying；
(2) preparation of super hydrophobic polyurethane elastomer：Polyurethane particles are dispersed in the second solvent, step (1) is added
Base polyurethane prepolymer for use as and stir evenly, pour into Teflon mould, after baking and curing super hydrophobic polyurethane elastomer.
Further, first solvent is the mixing of ethyl alcohol, methanol, ethyl acetate, propyl alcohol any one or more of
Object；First solvent is 10 times of polysiloxanes number.
Further, second solvent is ethyl alcohol, propyl alcohol, ethyl acetate, methanol, toluene, n-butanol, acetone, tetrahydrochysene
The mixture of furans any one or more of；Second solvent is 5 times of polyurethane particles number.
Further, the mass fraction of the ammonium hydroxide is 30%.
Further, the vacuum drying temperature described in step (1) is 50 DEG C, and the vacuum drying time is 10~24 hours.
Further, the drying temperature described in step (2) is 90~120 DEG C, and hardening time is 3~5 hours
Compared with prior art, the beneficial effects of the invention are as follows：
1) tensile strength >=4MPa of super hydrophobic polyurethane elastomer of the invention, elongation at break >=400%, surface
Contact angle with water is 150 °~158 °.
2) raw material used in the present invention is cheap and easily-available, no fluorine-containing material, and building-up process is not necessarily to special condition and equipment, closes
At technique it is easy to implement and regulation and control.
3) super hydrophobic polyurethane elastomer of the invention, it is not only easy to implement in technique, but also can be poly- by adjusting
The reacting dose of siloxanes, silane coupling agent and isocyanates is easy to regulate and control the structure and performance of product in very large range.
4) urethane raw needed for preparation method of the present invention, polysiloxanes, silane coupling agent are the industry of commercialization
The technique of product, synthesis of polyurethane is also more ripe.Therefore, preparation is simple, cost is relatively low.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and is used to explain the present invention together with embodiments of the present invention,
It is not construed as limiting the invention, in the accompanying drawings：
Fig. 1 is the infrared spectrum of base polyurethane prepolymer for use as made from embodiment 1.
Fig. 2 is the infrared spectrum of silane coupling agent blocked polyurethane made from embodiment 1.
Fig. 3 is the infrared spectrum of polyurethane particles made from embodiment 1.
Fig. 4 (a) is photo of the water droplet on normal polyurethane elastomer surface, and 4 (b) is that water droplet surpasses made from embodiment 1
The photo of hydrophobic polyurethane surface of elastomer.
Fig. 5 is the SEM photograph of super hydrophobic polyurethane surface of elastomer made from embodiment 1.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment 1
The preparation of polyurethane particles：75 parts of hydroxy-terminated polysiloxanes and 12 parts of 1,6- hexamethylene diisocyanates are mixed
Conjunction stirs evenly, and 100 DEG C are reacted 2 hours, obtains the base polyurethane prepolymer for use as that end is isocyanate group；Then by 13 parts of 3- ammonia third
Base trimethoxy silane is added in reaction system, and 90 DEG C are reacted 2 hours, and the polyurethane of silane coupling agent sealing end is obtained；Then
It is dispersed in ethyl alcohol, ammonium hydroxide is added dropwise dropwise makes the pH value of reaction system be that 10,25 DEG C of degree react 24 hours, after the completion of reaction
Clean 2 times with ethyl alcohol, after 50 DEG C of vacuum drying 10 hours polyurethane particles；
The preparation of super hydrophobic polyurethane elastomer：In acetone by 10 parts of polyurethane particles dispersions, 10 parts of polyurethane are added
Performed polymer simultaneously stirs evenly, and pours into Teflon mould, and 90 DEG C of baking and curings obtain super hydrophobic polyurethane elasticity after 5 hours
Body.
Using base polyurethane prepolymer for use as made from the present embodiment by obtaining normal polyurethane elastomer after crosslinking, to its correlation
Performance is tested, and is compared with the performance of super hydrophobic polyurethane elastomer made from the present embodiment.
Fig. 1 is the infrared spectrum of base polyurethane prepolymer for use as made from the present embodiment.It can be seen from the figure that in 2271cm-1Place
The asymmetric stretching vibration peak of appearance-N ═ C ═ O, in 1705cm-1The stretching vibration that-C ═ the O in carbamate occurs in place is inhaled
Peak is received, and in 1527cm-1There is the absorption peak of the amide II in polyurethane, 3337cm in place-1It is stretched for the N-H in carbamate
Contracting vibration peak, in 1260cm-1There is the absorption peak of Si-C, 1093cm in place-1For the stretching vibration absworption peak of Si-O-Si, 800cm-1
For the flexural vibrations peak of methyl on Si atoms.Show to synthesize designed base polyurethane prepolymer for use as really through the infrared analysis.
Fig. 2 is the infrared spectrum of silane coupling agent blocked polyurethane made from the present embodiment.It can be seen from the figure that
2271cm-1The asymmetric stretching vibration peak of place appearance-N ═ C ═ O has disappeared, in 1571cm-1There is the acyl in polyurethane in place
The absorption peak of amine II, 3331cm-1For the N-H stretching vibration peaks in carbamate, 1704cm-1It is inhaled for the stretching vibration of C ═ O
Peak is received, and in 1258cm-1There is the absorption peak of Si-C, 1076cm in place-1For the stretching vibration absworption peak of Si-O-Si, 789cm-1For
The flexural vibrations peak of methyl on Si atoms.Show that synthesizing designed silane coupling agent really blocks poly- ammonia through the infrared analysis
Ester.
Fig. 3 is the infrared spectrum of polyurethane particles made from the present embodiment.It can be seen from the figure that in 1576cm-1Place goes out
The absorption peak of amide II in existing polyurethane, 3332cm-1For the N-H stretching vibration peaks in carbamate, 1704cm-1For C ═
The stretching vibration absworption peak of O, 1090cm-1To 1260cm-1Absorption peak broaden.Show set by synthesis really through the infrared analysis
The polyurethane particles of meter.
Fig. 4 (a) is water droplet normal polyurethane elastomer made from the present embodiment, and Fig. 4 (b) is water droplet in the present embodiment system
The photo of the super hydrophobic polyurethane elastomer obtained, it can be seen from the figure that water droplet is in semicircle on normal polyurethane elastomer surface
Shape, and it is in rounded shape on super hydrophobic polyurethane surface of elastomer.
Fig. 5 is the SEM figures of super hydrophobic polyurethane surface of elastomer made from the present embodiment, can clearly be found out from figure poly-
There is urethane surface of elastomer various sizes of roughness, this side surface roughness to increase the hydrophobicity on surface.
The aerial water contact angle of material surface is measured using the DSA100 type contact angle measurement of German KRUSS companies
WCA simultaneously carries out contact angle photo acquisition, and experimental result is the average value of five tests of sample surfaces different location.Measure this implementation
The contact angle of super hydrophobic polyurethane surface of elastomer and water made from example is 158 °, and common polyurethane elastomer is 110 °.
The extension at break of super hydrophobic polyurethane elastomer made from the present embodiment is measured by standard GB/T/T 528-2009
Rate is 450%, tensile strength 4.2MPa；The elongation at break of common polyurethane elastomer is 260%, and tensile strength is
3.0MPa。
Embodiment 2
The preparation of polyurethane particles：By 50 parts of amino-terminated polysiloxanes and 30 parts of diphenyl methanes -4,4 '-diisocyanate
Ester is mixed evenly, and 60 DEG C are reacted 10 hours, obtains the base polyurethane prepolymer for use as that end is isocyanate group；Then by 20 parts of N-
Aminoethyl-γ-aminopropyltrimethoxysilane is added in reaction system, and 60 DEG C are reacted 5 hours, obtains silane coupling agent sealing end
Polyurethane；Then it is dispersed in methanol, ammonium hydroxide is added dropwise dropwise makes the pH value of reaction system be that 13,60 DEG C of degree reactions 10 are small
When, clean 4 times with ethyl alcohol after the completion of reaction, after 50 DEG C of vacuum drying 24 hours polyurethane particles；
The preparation of super hydrophobic polyurethane elastomer：10 parts of polyurethane particles are dispersed in ethyl acetate, 10 parts is added and gathers
Urethane performed polymer simultaneously stirs evenly, and pours into Teflon mould, and 120 DEG C of baking and curings obtain super hydrophobic polyurethane after 3 hours
Elastomer.
It is 150 ° to measure the contact angle of super hydrophobic polyurethane surface of elastomer and water made from the present embodiment.By national standard
The elongation at break that GB/T 528-2009 measure super hydrophobic polyurethane elastomer made from the present embodiment is 420%, tensile strength
For 4.6MPa.
Embodiment 3
The preparation of polyurethane particles：60 parts of amino-terminated polysiloxanes and 25 parts of isophorone diisocyanate are mixed and stirred
It mixes uniformly, 75 DEG C are reacted 4.5 hours, and the base polyurethane prepolymer for use as that end is isocyanate group is obtained；Then 15 parts of 3- are shunk sweet
Oily ether oxygen propyl triethoxysilane is added in reaction system, and 75 DEG C are reacted 3 hours, and the poly- ammonia of silane coupling agent sealing end is obtained
Ester；Then it is dispersed in ethyl alcohol, ammonium hydroxide is added dropwise dropwise makes the pH value of reaction system spend reaction 18 hours for 12,40 DEG C, instead
Should after the completion of with ethyl alcohol clean 3 times, 50 DEG C of vacuum drying obtain polyurethane particles after 20 hours；
The preparation of super hydrophobic polyurethane elastomer：10 parts of polyurethane particles are dispersed in toluene, 10 parts of polyurethane are added
Performed polymer simultaneously stirs evenly, and pours into Teflon mould, and 110 DEG C of baking and curings obtain super hydrophobic polyurethane elasticity after 4 hours
Body.
It is 152 ° to measure the contact angle of super hydrophobic polyurethane surface of elastomer and water made from the present embodiment.By national standard
The elongation at break that GB/T 528-2009 measure super hydrophobic polyurethane elastomer made from the present embodiment is 400%, tensile strength
For 4.8MPa.
Embodiment 4
The preparation of polyurethane particles：65 parts of hydroxy-terminated polysiloxanes and 26 parts of isophorone diisocyanate are mixed and stirred
It mixes uniformly, 85 DEG C are reacted 3 hours, and the base polyurethane prepolymer for use as that end is isocyanate group is obtained；Then by 17 parts of N- aminoethyls -3-
Aminopropyl triethoxysilane is added in reaction system, and 80 DEG C are reacted 4 hours, and the polyurethane of silane coupling agent sealing end is obtained；
Then it is dispersed in ethyl alcohol, ammonium hydroxide is added dropwise dropwise makes the pH value of reaction system be that 11,50 DEG C of degree react 15 hours, has reacted
Cheng Houyong ethyl alcohol clean 3 times, 50 DEG C vacuum drying 24 hours after polyurethane particles；
The preparation of super hydrophobic polyurethane elastomer：10 parts of polyurethane particles are dispersed in toluene, 10 parts of polyurethane are added
Performed polymer simultaneously stirs evenly, and pours into Teflon mould, and 100 DEG C of baking and curings obtain super hydrophobic polyurethane bullet after 4.5 hours
Property body.
It is 152 ° to measure the contact angle of super hydrophobic polyurethane surface of elastomer and water made from the present embodiment.By national standard
The elongation at break that GB/T 528-2009 measure super hydrophobic polyurethane elastomer made from the present embodiment is 430%, tensile strength
For 4.3MPa.
Finally it should be noted that：It these are only the preferred embodiment of the present invention, be not intended to restrict the invention, although
With reference to embodiment, invention is explained in detail, for those skilled in the art, still can be to aforementioned
Technical solution recorded in each embodiment is modified or equivalent replacement of some of the technical features, but it is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of super hydrophobic polyurethane elastomer, which is characterized in that in terms of mass fraction, raw material components group becomes：
12~30 parts of isocyanates
50~75 parts of polysiloxanes
13~20 parts of silane coupling agent.
2. a kind of super hydrophobic polyurethane elastomer according to claim 1, which is characterized in that the isocyanates is different Buddhist
That ketone diisocyanate, 1,6- hexamethylene diisocyanates, toluene di-isocyanate(TDI), diphenyl methane -4,4 '-diisocyanate
Ester, benzene dimethylene diisocyanate, Methylcyclohexyl diisocyanate, tetramethylxylylene diisocyanate, HDI tri-
It is one or more in aggressiveness, IPDI tripolymers, TDI tripolymers and MDI tripolymers.
3. a kind of super hydrophobic polyurethane elastomer according to claim 1, which is characterized in that the polysiloxanes is hydroxyl
It is one or more in terminated polysiloxane, amino-terminated polysiloxanes and end hydroxy polyether polysiloxanes；Point of polysiloxanes
Son amount is 1000~6000g/mol.
4. a kind of super hydrophobic polyurethane elastomer according to claim 1, which is characterized in that the silane coupling agent is 3-
Aminopropyl trimethoxysilane, N- aminoethyl -3- aminopropyl triethoxysilanes, N- aminoethyls-γ-aminopropyl trimethoxy silicon
Alkane, 3- aminopropyl triethoxysilanes, (3- mercaptopropyis) triethoxysilane, γ-glycidyl ether oxygen propyl trimethoxy
The mixture of silane, 3- glycidoxypropyltrietandysilane andysilane any one or more ofs.
5. a kind of super hydrophobic polyurethane method for producing elastomers according to claim 1, which is characterized in that including walking as follows
Suddenly：
(1) preparation of polyurethane particles：Polysiloxanes and isocyanates are mixed evenly, 60~100 DEG C of reactions 2~10 are small
When, obtain the base polyurethane prepolymer for use as that end is isocyanate group；Then silane coupling agent is added in reaction system, 60~90
DEG C reaction 2~5 hours, obtain silane coupling agent sealing end polyurethane；Then it is dispersed in the first solvent, ammonia is added dropwise dropwise
Water makes the pH value of reaction system be that 10~13,25~60 DEG C of degree react 10~24 hours, and 2 are cleaned with the first solvent after the completion of reaction
~4 times, polyurethane particles are obtained after vacuum drying；
(2) preparation of super hydrophobic polyurethane elastomer：Polyurethane particles are dispersed in the second solvent, the poly- of step (1) is added
Urethane performed polymer simultaneously stirs evenly, and pours into Teflon mould, and super hydrophobic polyurethane elastomer is obtained after baking and curing.
6. a kind of super hydrophobic polyurethane method for producing elastomers according to claim 5, which is characterized in that described first
Solvent is the mixture of ethyl alcohol, methanol, ethyl acetate, propyl alcohol any one or more of；First solvent is polysiloxanes number
10 times.
7. a kind of super hydrophobic polyurethane method for producing elastomers according to claim 5, which is characterized in that described second
Solvent is the mixing of ethyl alcohol, propyl alcohol, ethyl acetate, methanol, toluene, n-butanol, acetone, tetrahydrofuran any one or more of
Object；Second solvent is 5 times of polyurethane particles number.
8. a kind of super hydrophobic polyurethane method for producing elastomers according to claim 5, which is characterized in that the ammonium hydroxide
Mass fraction be 30%.
9. a kind of super hydrophobic polyurethane method for producing elastomers according to claim 5, which is characterized in that step (1) institute
The vacuum drying temperature stated is 50 DEG C, and the vacuum drying time is 10~24 hours.
10. a kind of super hydrophobic polyurethane method for producing elastomers according to claim 5, which is characterized in that step (2) institute
The drying temperature stated is 90~120 DEG C, and hardening time is 3~5 hours.
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| CN109535374A (en) * | 2018-11-28 | 2019-03-29 | 厦门誉匠复合材料有限公司 | A kind of polyurethane elastomer and preparation method thereof |
| CN110294832A (en) * | 2019-07-16 | 2019-10-01 | 道勤材料技术(麻城)有限公司 | A kind of polyurethane termoplastic elastomer and preparation method thereof of amino POSS modification |
| CN110467717A (en) * | 2019-07-09 | 2019-11-19 | 广东德美精细化工集团股份有限公司 | A kind of not fluorine-containing waterproof polymer intermediate and preparation method thereof |
| CN112095230A (en) * | 2020-08-15 | 2020-12-18 | 福建冠泓工业有限公司 | Super-soft super-fluffy spun-bonded non-woven fabric and preparation method thereof |
| CN112680082A (en) * | 2020-12-25 | 2021-04-20 | 广东炫丽新材料科技有限公司 | Preparation method of TPE (thermoplastic elastomer) anti-oil stain agent and anti-oil stain agent |
| CN116493217A (en) * | 2023-04-27 | 2023-07-28 | 南京工程学院 | Composite anti-icing coating and preparation method thereof |
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