CN117645705A - Fluorine-containing polyurethane elastomer and preparation method thereof - Google Patents
Fluorine-containing polyurethane elastomer and preparation method thereof Download PDFInfo
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- CN117645705A CN117645705A CN202311611670.2A CN202311611670A CN117645705A CN 117645705 A CN117645705 A CN 117645705A CN 202311611670 A CN202311611670 A CN 202311611670A CN 117645705 A CN117645705 A CN 117645705A
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- bisphenol
- fluorine
- polyether polyol
- elastomer
- polyurethane
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- 229920003225 polyurethane elastomer Polymers 0.000 title claims abstract description 31
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 28
- 239000011737 fluorine Substances 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920005862 polyol Polymers 0.000 claims abstract description 36
- 150000003077 polyols Chemical class 0.000 claims abstract description 36
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 35
- 229920000570 polyether Polymers 0.000 claims abstract description 35
- ZFVMWEVVKGLCIJ-UHFFFAOYSA-N bisphenol AF Chemical compound C1=CC(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C=C1 ZFVMWEVVKGLCIJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 21
- 229920002635 polyurethane Polymers 0.000 claims description 16
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 14
- 239000004814 polyurethane Substances 0.000 claims description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
- 239000004970 Chain extender Substances 0.000 claims description 11
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000000806 elastomer Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 125000002947 alkylene group Chemical group 0.000 claims description 8
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 7
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- 125000005442 diisocyanate group Chemical group 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 5
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 5
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 5
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical group CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000003999 initiator Substances 0.000 claims description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007151 ring opening polymerisation reaction Methods 0.000 claims description 3
- 238000009849 vacuum degassing Methods 0.000 claims description 3
- ZWVMLYRJXORSEP-UHFFFAOYSA-N 1,2,6-Hexanetriol Chemical compound OCCCCC(O)CO ZWVMLYRJXORSEP-UHFFFAOYSA-N 0.000 claims description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- 150000004985 diamines Chemical class 0.000 claims description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 2
- 150000002009 diols Chemical class 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 10
- 239000002904 solvent Substances 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000003814 drug Substances 0.000 abstract description 2
- 230000036541 health Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 125000003827 glycol group Chemical group 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- OYQYHJRSHHYEIG-UHFFFAOYSA-N ethyl carbamate;urea Chemical compound NC(N)=O.CCOC(N)=O OYQYHJRSHHYEIG-UHFFFAOYSA-N 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000004812 organic fluorine compounds Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012430 stability testing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The invention provides a fluorine-containing polyurethane elastomer and a preparation method thereof. Compared with the conventional polyether polyol, the bisphenol AF polyether polyol not only endows the fluorine-containing polyurethane elastomer with excellent performances of heat resistance, oil repellency, water repellency, solvent resistance and the like, but also has good mechanical properties; meanwhile, the fluorine-containing polyurethane elastomer is endowed with good damping performance. Can be used in the modern high-end technical fields of heavy anti-corrosion coating, aircraft skin, radome, building shock absorption, traffic damping, solar cell, medicine and health and the like, and has wide application and development prospect.
Description
Technical Field
The invention belongs to the technical field of polyurethane products, and relates to a fluorine-containing polyurethane elastomer and a preparation method thereof.
Background
Polyurethane products are widely applied in the fields of construction, packaging, automobile industry, energy conservation and the like by virtue of excellent performances, and along with the development of technology, the demands of people on the material performances are more diversified, and the regulation and control on the polyurethane material performances can be realized by changing the types and the amounts of functional groups in raw materials and the duty ratio of functional elements. The fluorine-containing polyurethane is taken as a novel functional material, the advantages of the fluorine-containing polymer and the advantages of the polyurethane are perfectly fused, and the polyurethane material is endowed with more excellent thermal stability, solvent resistance, excellent mechanical properties and excellent surface properties through the introduction of fluorine.
A series of fluorochemical urethane urea was prepared by Takakura et al in 1990 using 2,3, 4, 5-octafluorohexamethylene diisocyanate. However, the synthesis cost is high, the variability of the fluorinated diisocyanate is low, and the commercial potential is not provided.
The CN 116355393 reduces the hardness of the polyurethane elastomer by introducing the perfluoropolyether dihydric alcohol into the polyurethane molecular chain, avoids modification by adding an organofluorine auxiliary agent in the later period, simplifies the process steps, reduces the risk of precipitation after blending modification of the material, and the prepared TPU material has the excellent performances of water resistance, oil resistance, dirt resistance, solvent resistance and the like of the organofluorine compound.
In the related research of introducing fluorine atoms into polyurethane materials, the form of introducing fluorine atoms into polyurethane elastomers is generally that fluorine-containing raw materials are directly added for reaction, so that the research of preparing polyurethane elasticity by preparing fluorine-containing polyether polyol is less, and the performance of the fluorine-containing polyurethane elastomers is more developed around thermal stability, solvent resistance, mechanical performance, surface performance and the like, and the research of damping performance is less.
Disclosure of Invention
The aim of the invention is to produce a polyurethane elastomer with excellent thermal stability, water resistance, solvent resistance, mechanical properties and good damping properties. The fluorine-containing polyether polyol is prepared by bisphenol AF and is used for preparing the polyurethane elastomer, so that the polyurethane elastomer is endowed with excellent heat stability, water resistance, solvent resistance, mechanical property and damping property.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a fluorine-containing polyurethane elastomer, which is prepared from polyurethane prepolymer and chain extender by a prepolymer method;
the raw materials of the polyurethane prepolymer comprise bisphenol AF polyether polyol, non-fluorine polyether polyol, diisocyanate and catalyst;
wherein, each component comprises the following components in parts by mass:
the bisphenol AF polyether polyol is prepared by ring-opening polymerization of bisphenol AF and alkylene oxide in the presence of a catalyst. Among them, ethylene oxide, propylene oxide, butylene oxide and the like are preferable, and ethylene oxide and propylene oxide are more preferable. The molar ratio of bisphenol AF to alkylene oxide is 1: 2-1: 6. the catalyst is preferably double metal cyanide DMC;
the preparation method comprises the following steps:
adding bisphenol AF and DMC into a reaction kettle, replacing nitrogen, vacuum dehydrating for 1-2 h at 90-100 ℃, heating to 120-150 ℃, starting to add alkylene oxide monomer, curing for 1-2 h at 140-150 ℃ after the monomer addition is finished, and vacuum degassing to obtain bisphenol AF polyether polyol product.
In the present invention, the non-fluoropolyether polyol is selected from one or more of the following polyether polyols:
the polyether polyol 1, the initiator is one or more of glycerol, trimethylolpropane, 1,2, 6-hexanetriol, triethanolamine and the like, preferably one or more of glycerol and trimethylolpropane, more preferably glycerol, has an average functionality of 3, and a hydroxyl value of preferably 100 to 700mgKOH/g, more preferably 100 to 300mgKOH/g. Such as R2307, R2303, R2305, R2310 of vandergar chemical (Ningbo) Rong Wei polyurethane limited;
polyether polyol 2, the initiator is one or more of ethylene glycol, diethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol and 1, 4-butanediol, preferably one or more of ethylene glycol, propylene glycol and diethylene glycol, more preferably propylene glycol, the average functionality is 2, the hydroxyl value is preferably 50-400 mgKOH/g, more preferably 50-300 mgKOH/g, such as C2010 and C2020 of Wanhua chemical (Ningbo) Rong Wei polyurethane limited company;
wherein the polymerized monomers of the polyether polyols 1 and 2 are one or more of ethylene oxide, propylene oxide and tetrahydrofuran.
In the present invention, the diisocyanate is preferably isophorone diisocyanate.
In the present invention, the catalyst is preferably dibutyltin dilaurate.
In the present invention, the chain extender is a glycol, diamine, acetamide, etc., preferably a glycol chain extender such as 1, 4-butanediol, diethylene glycol, more preferably 1, 4-butanediol;
the mass ratio of the chain extender to the prepolymer is preferably 1:50 to 1:30, more preferably 1:40 to 1:35.
The invention also provides a preparation method of the fluorine-containing polyurethane elastomer.
The synthesis process of the fluorine-containing polyurethane elastomer is a prepolymer method, and specifically comprises the following steps:
mixing bisphenol AF polyether polyol and non-fluorinated polyether polyol in the proportion, vacuum dehydrating for 1-2 h at 100-120 ℃, cooling to 70-90 ℃, adding isophorone diisocyanate and catalyst dibutyl tin dilaurate, and reacting for 2-3 h at 70-90 ℃ to obtain polyurethane prepolymer;
adding a certain proportion of chain extender into the prepolymer, fully and uniformly mixing, pouring into a mold, and curing at room temperature to obtain the fluorine-containing polyurethane elastomer.
The fluorine-containing polyurethane elastomer can be used in the modern high-end technical fields of heavy anti-corrosion coating, aircraft skin, radome, building shock absorption, traffic damping, solar cell, medicine and health and the like, and has wide application and development prospects.
The invention has the positive effects that:
(1) The invention provides a polyether polyol with a fluorine-containing multi-benzene ring structure. The bisphenol AF molecular structure contains two benzene ring structures, and the bisphenol AF molecular structure and the alkylene oxide are subjected to ring-opening polymerization to prepare polyether polyol containing benzene rings and fluorine elements.
(2) The bisphenol AF polyether polyol is introduced into the polyurethane elastomer, so that the incompatibility degree of the soft segment and the hard segment in the polyurethane chain segment is increased, the microphase separation trend is more obvious, the hard segments are uniformly distributed in the soft segment phase, the fluorine-containing polyurethane elastomer is endowed with good damping performance, and the application scene of the functional polyurethane elastomer is expanded.
(3) The preparation method of the fluorine-containing polyurethane elastomer material provided by the invention is simple to operate, does not need to treat solvents, and is environment-friendly.
Detailed Description
For a better understanding of the technical solution of the present invention, the following examples are further described below, but the present invention is not limited to the following examples.
Raw material information:
bisphenol AF: lifan chemical Co., ltd;
propylene oxide, ethylene oxide: wanhua chemical group Co., ltd;
isophorone diisocyanate: wanhua chemical group Co., ltd;
dibutyl tin dilaurate: national pharmaceutical group chemical agents, inc;
1, 4-butanediol, wanhua chemical group Co., ltd;
polyether polyol R2310 (polyether polyol 1), manufactured by Wanhua chemical (Ningbo) Rong Wei polyurethane Co., ltd., functionality 3, hydroxyl value 168mg KOH/g, molecular weight 1000;
polyether polyol C2020 (polyether polyol 2), wanhua chemical (Ningbo) Rong Wei polyurethane Co., ltd., functionality 2, hydroxyl number 56.1mg KOH/g, molecular weight 2000.
Example 1
Preparation of bisphenol AF polyether polyol: 1680g bisphenol AF and 0.14g DMC are added into a stainless steel reaction kettle, nitrogen substitution is carried out for 3 times at normal temperature, vacuum dehydration is carried out for 1.5h after the temperature is raised to 100 ℃, propylene oxide monomer is added after the dehydration is completed and the temperature is raised to 135 ℃, and the mole ratio of bisphenol AF to propylene oxide is controlled to be 1: and 4, stopping feeding when the feeding amount of propylene oxide is 1160g, curing at 150 ℃ for 1.5h, and then vacuum degassing for 30min to obtain the bisphenol AF polyether polyol product.
Preparation of a fluoropolyurethane elastomer:
adding 30g of bisphenol AF polyether polyol, 18.5g of R2310 and 20g of C2020 into a three-neck flask, heating to 120 ℃ for vacuum dehydration for 1h, cooling to 80 ℃, adding 31g of isophorone diisocyanate and 0.5g of catalyst dibutyltin dilaurate, and reacting for 3h at the constant temperature of 80 ℃ to obtain a polyurethane prepolymer;
2.7g of 1, 4-butanediol is added into the prepolymer, and after being fully and uniformly mixed, the mixture is poured into a die and cured for 7 hours at room temperature, thus obtaining the fluorine-containing polyurethane elastomer.
The proportions of the components and the mass ratio of the chain extender in the prepolymer in examples 1 to 6 are shown in Table 1, wherein bisphenol AF: propylene oxide represents the molar ratio, and the dosage units of each component are g:
TABLE 1
Test of polyurethane elastomer properties the polyurethane elastomers prepared in examples 1-6 and comparative examples 1,2 were subjected to an elastomer property test comprising:
(1) Thermal stability testing Using the Switzerland Metrele-Tolyduo national trade (supra)Sea) TGA/1100SF thermogravimetric analyzer, N 2 Atmosphere, heating rate of 20 ℃/min and test range of 30-600 ℃;
(2) Measuring the contact angle of surface water, namely adopting an OCA40 type optical contact angle tester of the DONGFANGDONGDONGDEFEI instrument Co, to perform surface contact angle test, measuring 10 points at different positions of each sample, and taking an average value;
(3) Water absorption test, cutting the cured film into 3cm×3cm samples and weighing mass m 0 Immersed in water, placed at room temperature and taken out at intervals, the surface liquid is quickly wiped off with filter paper and weighed, recorded as m, and the water absorption is calculated according to the following formula:
(4) Mechanical Strength test tensile properties were tested according to GB/T528-1998 using an Instron 5967 universal tensile machine from Instron;
(5) Damping performance test: the test is completed by a dynamic analyzer of NETZSCH242, germany, and the test conditions are as follows: the deformation mode of the double cantilever beam is used, the temperature is tested at-80 ℃ to 100 ℃, the temperature rising rate is 5K/min, the frequency is 10Hz, the maximum load is 2N, and the maximum amplitude is 120 mu m.
The results of the performance test of the polyurethane elastomers prepared in examples 1 to 6 and comparative examples 1 and 2 are shown in Table 2:
TABLE 2 polyurethane elastomer Performance test results
As can be seen from Table 2, the fluoropolyurethane elastomers prepared in examples 1-6 have excellent thermal stability, hydrophobicity, mechanical properties and good damping properties. Comparative example 1 without bisphenol AF polyether polyol had the worst thermal stability, hydrophobicity, and mechanical properties; comparative example 2 the performance improvement effect of examples 1-6 could not be achieved due to the poor raw material ratio of bisphenol AF polyether.
The above shows that the introduction of the fluorine-containing bisphenol AF polyether glycol into the polyurethane elastomer can effectively improve the thermal stability, the hydrophobicity, the mechanical property and the damping property of the material, and endow the polyurethane elastomer with more excellent performance.
Those skilled in the art will appreciate that certain modifications and adaptations of the invention are possible and can be made under the teaching of the present specification. Such modifications and adaptations are intended to be within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A fluorine-containing polyurethane elastomer, which is prepared from polyurethane prepolymer and chain extender:
wherein, the raw materials of the polyurethane prepolymer comprise the following components in parts by mass:
2. the fluoropolyurethane elastomer according to claim 1, wherein said bisphenol AF polyether polyol is prepared by ring-opening polymerization of bisphenol AF and alkylene oxide;
preferably, the alkylene oxide is selected from ethylene oxide, propylene oxide, butylene oxide, the molar ratio of bisphenol AF to alkylene oxide being 1: 2-1: 6.
3. the fluoropolyurethane elastomer according to claim 2, wherein the bisphenol AF polyether polyol is prepared by the following method:
adding bisphenol AF and a catalyst into a reaction kettle, replacing nitrogen, dehydrating in vacuum for 1-2 h at 90-100 ℃, heating to 120-150 ℃, starting to add an alkylene oxide monomer, curing for 1-2 h at 140-150 ℃ after the monomer addition is finished, and then performing vacuum degassing to obtain a bisphenol AF polyether polyol product.
4. The fluoropolyurethane elastomer of claim 1, wherein the non-fluoropolyether polyol is selected from one or more of the following polyether polyols:
polyether polyol 1: the initiator is one or more of glycerol, trimethylolpropane, 1,2, 6-hexanetriol and triethanolamine, the average functionality is 3, the hydroxyl value is 100-700 mgKOH/g, such as R2307, R2303, R2305 and R2310 of Wanhua chemical (Ningbo) Rong Wei polyurethane limited company;
polyether polyol 2: the initiator is one or more of ethylene glycol, diethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, triethylene glycol and 1, 4-butanediol, the average functionality is 2, the hydroxyl value is 50-400 mgKOH/g, such as C2010 and C2020 of Wanhua chemical (Ningbo) Rong Wei polyurethane limited company;
the polymeric monomers of the polyether polyols 1,2 are one or more of ethylene oxide, propylene oxide and tetrahydrofuran.
5. The fluoropolyurethane elastomer of claim 1, wherein said diisocyanate is isophorone diisocyanate.
6. The fluoropolyurethane elastomer of claim 1, wherein said catalyst is dibutyltin dilaurate.
7. The fluoropolyurethane elastomer according to any of claims 1 to 6, wherein the chain extender is at least one of a diol, a diamine, an acetamide, preferably a diol chain extender, such as 1, 4-butanediol, diethylene glycol.
8. The fluoropolyurethane elastomer according to claim 7, wherein the mass ratio of chain extender to prepolymer is 1:50 to 1:30.
9. The method for producing a fluorine-containing polyurethane elastomer according to any one of claims 1 to 8, comprising:
mixing bisphenol AF polyether polyol with non-fluoropolyether polyol, vacuum dehydrating, cooling, adding diisocyanate and a catalyst, and reacting at constant temperature to obtain polyurethane prepolymer;
adding a chain extender into the prepolymer, fully and uniformly mixing, pouring into a mold, and curing at room temperature to obtain the fluorine-containing polyurethane elastomer.
10. The preparation method according to claim 9, wherein the vacuum dehydration is carried out at 100-120 ℃ for 1-2 hours, and the temperature is reduced to 70-90 ℃; reacting for 2-3 h at the constant temperature of 70-90 ℃.
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