CN114044871A - Heat-insulation polyurethane foam for power battery pack and preparation method thereof - Google Patents
Heat-insulation polyurethane foam for power battery pack and preparation method thereof Download PDFInfo
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- CN114044871A CN114044871A CN202111541236.2A CN202111541236A CN114044871A CN 114044871 A CN114044871 A CN 114044871A CN 202111541236 A CN202111541236 A CN 202111541236A CN 114044871 A CN114044871 A CN 114044871A
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- Prior art keywords
- parts
- polyol
- polyurethane foam
- heat
- power battery
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- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 61
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 title claims abstract description 21
- 229920005862 polyol Polymers 0.000 claims abstract description 67
- 150000003077 polyols Chemical class 0.000 claims abstract description 57
- 239000003063 flame retardant Substances 0.000 claims abstract description 39
- -1 flame retardant polyol Chemical class 0.000 claims abstract description 35
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 30
- 239000008158 vegetable oil Substances 0.000 claims abstract description 30
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000012948 isocyanate Substances 0.000 claims abstract description 27
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 27
- 239000006260 foam Substances 0.000 claims abstract description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 10
- 239000004970 Chain extender Substances 0.000 claims abstract description 8
- 239000003381 stabilizer Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 11
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 9
- 150000002009 diols Chemical class 0.000 claims description 9
- WZLFPVPRZGTCKP-UHFFFAOYSA-N 1,1,1,3,3-pentafluorobutane Chemical compound CC(F)(F)CC(F)(F)F WZLFPVPRZGTCKP-UHFFFAOYSA-N 0.000 claims description 8
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical group CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 8
- 150000001412 amines Chemical class 0.000 claims description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 229920013822 aminosilicone Polymers 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 125000003277 amino group Chemical group 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 2
- 229910052736 halogen Inorganic materials 0.000 claims 2
- 150000002367 halogens Chemical class 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 2
- 229910052698 phosphorus Inorganic materials 0.000 claims 2
- 239000011574 phosphorus Substances 0.000 claims 2
- 150000003384 small molecules Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000010521 absorption reaction Methods 0.000 abstract description 12
- 230000007062 hydrolysis Effects 0.000 abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 19
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 9
- ZJXZSIYSNXKHEA-UHFFFAOYSA-N ethyl dihydrogen phosphate Chemical compound CCOP(O)(O)=O ZJXZSIYSNXKHEA-UHFFFAOYSA-N 0.000 description 8
- 239000004721 Polyphenylene oxide Substances 0.000 description 7
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 7
- 229920000570 polyether Polymers 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 6
- 239000000347 magnesium hydroxide Substances 0.000 description 6
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 5
- 230000032683 aging Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 150000005846 sugar alcohols Polymers 0.000 description 3
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 229940035437 1,3-propanediol Drugs 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 210000000497 foam cell Anatomy 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- BJZYYSAMLOBSDY-QMMMGPOBSA-N (2s)-2-butoxybutan-1-ol Chemical compound CCCCO[C@@H](CC)CO BJZYYSAMLOBSDY-QMMMGPOBSA-N 0.000 description 1
- 229940043375 1,5-pentanediol Drugs 0.000 description 1
- ZBHSAYWIYAVUOP-UHFFFAOYSA-N 2-(benzylamino)-1-[3-(trifluoromethyl)phenyl]ethanol Chemical compound C=1C=CC(C(F)(F)F)=CC=1C(O)CNCC1=CC=CC=C1 ZBHSAYWIYAVUOP-UHFFFAOYSA-N 0.000 description 1
- QWGRWMMWNDWRQN-UHFFFAOYSA-N 2-methylpropane-1,3-diol Chemical compound OCC(C)CO QWGRWMMWNDWRQN-UHFFFAOYSA-N 0.000 description 1
- 244000226021 Anacardium occidentale Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229940100573 methylpropanediol Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C08G18/6696—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
-
- 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
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
-
- 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
- C08G2101/00—Manufacture of cellular products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
Abstract
The invention discloses a heat insulation polyurethane foam for power battery packs and a preparation method thereof, belonging to the technical field of chemical synthesis, and comprising a polyol A component and isocyanate B, wherein the polyol A component comprises, by weight, 20-50 parts of vegetable oil modified polyol, 10-30 parts of flame retardant polyol, 20-45 parts of flame retardant, 3-10 parts of chain extender, 0.8-5.0 parts of cross-linking agent, 0.5-2.0 parts of foam stabilizer, 0.2-2.0 parts of catalyst, 1.0-3.O parts of amino siloxane and 3-10 parts of physical foaming agent, and the heat insulation polyurethane foam for power battery packs has the following beneficial effects: the prepared polyurethane foam has low heat conductivity coefficient, can meet the requirement of battery pack heat insulation, can increase the tensile strength and elongation of the foam, improve the impact resistance, play a role in impact protection on the battery pack, enable the product to have excellent hydrolysis resistance stability and low water absorption rate, have good heat insulation performance under damp-heat and wading environments, have good rebound rate, and can be quickly recovered after being impacted by foreign objects.
Description
Technical Field
The invention relates to the technical field of chemical synthesis, in particular to heat-insulating polyurethane foam for a power battery pack and a preparation method thereof.
Background
Along with the improvement of the requirements of national energy-saving and environment-friendly policies, the application and development of novel energy resources are widely regarded, the main power batteries at present are mainly iron phosphate lithium batteries and nickel-cobalt-manganese ternary lithium batteries, the characteristics of these lithium batteries result in a large influence of temperature on the activity and charge-discharge performance of the battery material, under different temperatures, the difference of the available capacity of the lithium battery is large, particularly in areas with low temperature, the capacity of the battery is obviously reduced, the use experience of users is seriously influenced, therefore, the regulation of the power battery within a proper working temperature range is a problem to be solved urgently by various large power battery manufacturers, in order to solve the problem, many power battery manufacturers adopt an intelligent temperature management system in the battery pack, the temperature is managed by heating, liquid cooling and the like, but a large amount of energy is consumed, and the efficiency of the battery is influenced.
Fill thermal-insulated heat preservation in the group battery box and can reduce the heat exchange of electric core and environment, guarantee that electric core is saved and is used under a suitable temperature, improved the storage life of electric core, among the prior art, power battery adopts organosilicon foam and foamed aluminum product all to have certain limitation, the mechanical strength of organosilicon foam is relatively poor, the coefficient of heat conductivity is on the high side, the processing difficulty, foamed aluminum material's proportion is too high, the coefficient of heat conductivity is high, insulating nature is poor.
Therefore, the invention is necessary to invent the heat-insulating polyurethane foam for the power battery pack and the preparation method thereof.
Disclosure of Invention
Therefore, the invention provides the heat-insulation polyurethane foam for the power battery pack and the preparation method thereof, and the low-heat-conductivity physical foaming agent, the polytetrahydrofuran dihydric alcohol, the vegetable oil polyhydric alcohol and the aminosiloxane are adopted, so that the polyurethane foam has low heat conductivity coefficient, the tensile strength and the elongation of the foam are increased, the impact resistance is improved, the excellent hydrolysis resistance stability and the low water absorption rate are realized, and the existing defects are overcome.
A heat insulation polyurethane foam for a power battery pack and a preparation method thereof are disclosed, which comprises the following steps: the adhesive comprises a polyol A component and an isocyanate B, wherein the polyol A component comprises the following components in parts by weight:
20-50 parts of vegetable oil modified polyol, 10-30 parts of flame retardant polyol, 20-45 parts of flame retardant, 3-10 parts of chain extender, 0.8-5.0 parts of cross-linking agent, 0.5-2.0 parts of foam stabilizer, 0.2-2.0 parts of catalyst, 1.0-3.O parts of aminosiloxane and 3-10 parts of physical foaming agent;
the isocyanate B component comprises the following components in parts by weight:
10-30 parts of toluene diisocyanate, 10-30 parts of polytetrahydrofuran diol and 50-70 parts of diphenylmethane diisocyanate;
the vegetable oil modified polyol is a multifunctional vegetable oil polyol, and the functionality range of the vegetable oil polyol is 2.0-3.0.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the hydroxyl value of the vegetable oil polyalcohol is 30-130 mgKOH.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the vegetable oil modified polyol is polyester polyol, polyether polyol or a copolymerization product of polyester and polyether polyol, the flame-retardant polyol is ethyl phosphate oligomer dihydric alcohol and simultaneously contains hydroxyl, and the hydroxyl value of the flame-retardant polyol is less than 200 mgKOH.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the flame retardant is an additive type liquid flame retardant with low VOC release amount, and the liquid flame retardant with low VOC release amount is phosphate ester flame retardant or halogenated phosphate ester flame retardant.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the chain extender is micromolecular dihydric alcohol and micromolecular amine, the functionality of the cross-linking agent is not less than 3 micromolecular alcohol, and the functionality of the cross-linking agent is not less than 3 micromolecular amine.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the catalyst is a low volatility metal catalyst and an amine blowing catalyst.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the aminosilicone is a large molecular weight siloxane compound containing long silica chains containing amino groups, and the viscosity of the aminosilicone is 600-3500 mPas.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the physical foaming agent is n-pentane, HFC-365mfc and HFC-365/227.
As a preferable aspect of the heat insulating polyurethane foam for a power battery pack according to the present invention, wherein: the molecular weight of the polytetrahydrofuran diol is 1000-3000.
A preparation method of heat-insulating polyurethane foam for a power battery pack comprises the following operation steps:
the method comprises the following steps: the preparation method of the polyol A component comprises the following steps:
adding the vegetable oil polyol, the flame-retardant polyol, the flame retardant, the chain extender and the cross-linking agent into a reaction kettle, stirring, then adding the catalyst, the foam stabilizer and the aminosiloxane, stirring uniformly at 25-30 ℃, adding the physical foaming agent, continuously stirring uniformly, and then sealing and storing;
step two: isocyanate B component preparation step:
reacting the polytetrahydrofuran diol with diphenylmethane diisocyanate in a reaction kettle at the temperature of 75-85 ℃ for 2-3 hours, cooling to 40-50 ℃, and adding toluene diisocyanate to obtain a prepolymer of an isocyanate B component;
step three: and mixing the prepolymer of the polyol A component and the isocyanate B component at a mixing ratio of 100:40-60, respectively injecting into a charging bucket of a casting machine, adjusting the ratio, injecting into a mold, and demolding for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
The invention has the beneficial effects that: the heat-insulating polyurethane foam for the power battery pack prepared by the invention can reach the V0 flame-retardant grade and can meet the flame-retardant requirement of the power battery pack;
the thermal insulation polyurethane foam for the power battery pack adopts a low-thermal-conductivity physical foaming agent, and the prepared polyurethane foam has a low thermal conductivity coefficient and can meet the requirement of thermal insulation of the battery pack;
the polytetrahydrofuran dihydric alcohol is adopted in the heat-insulation polyurethane foam for the power battery pack, so that the tensile strength and the elongation of the foam can be increased, the impact resistance can be improved, and the impact protection effect on the battery pack can be realized;
the heat-insulation polyurethane foam for the power battery pack adopts vegetable oil polyol and amino siloxane, so that the product has excellent hydrolysis resistance and stability and low water absorption rate, and the heat-insulation performance is still good under damp-heat and wading environments;
the heat-insulating polyurethane foam for the power battery pack has good resilience rate and can recover quickly after being impacted by a foreign object.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.
Example 1:
the invention provides a heat insulation polyurethane foam for a power battery pack and a preparation method thereof, wherein the preparation method comprises the following operation steps:
the preparation method of the polyol A component comprises the following steps:
39.3kg of vegetable oil polyol NX-9201,18.0kg of ethyl phosphate oligomer dihydric alcohol, 15.0kg of flame retardant SR-0270, 10.0kg of Antiblaze TL-10-ST,5.0kg of 1, 4-butanediol, 2.0kg of diethanolamine and 2.0kg of trimethylolpropane are added into a reaction kettle for stirring, then 0.04kg of BiCAT8106, 0.5kg of NE1070, 1.5kg of DC5950 and 2.0kg of KF8021 are added and stirred for 2 hours at the temperature of 25-30 ℃, 5kg of HFC-365mfc is added and stirred for 1 hour, and the mixture is sealed and stored to obtain a polyol A component;
the vegetable oil polyol is cashew nut shell oil polyol NX-9201, NX-9203, NX-9208, Basff vegetable oil polyol products Sovermol 1052 and Sovermol 1005, and the long carbon chain of the vegetable oil ester enables the vegetable oil modified polyol to have good flame retardance and low hygroscopicity, and meanwhile enables the vegetable oil modified polyol to have good low-temperature flexibility;
wherein the phosphate flame retardant is SR-0270, and the halogenated phosphate flame retardant is Antiblaze WR-30-LV and Antiblaze TL-10-ST;
the chain extender is micromolecular diol or amine, preferably ethylene glycol, ethanolamine, 1, 4-butanediol, 1, 3-propanediol, methylpropanediol, diethylene glycol, 1, 5-pentanediol and 1, 6-hexanediol, can react with functional groups on a polymer chain to expand molecular chains and increase molecular weight, and can improve the content of hard segments of polyurethane to improve hardness;
the cross-linking agent is micromolecule alcohol or micromolecule amine with the functionality degree of more than or equal to 3, preferably trimethylolpropane, triethanolamine, diethanolamine, triisopropanolamine and pentaerythritol, and can react with functional groups on a polymer chain to generate certain cross-linking of the molecular chain, so that the rebound rate of a polyurethane foam system can be improved, and the compression permanent deformation rate is reduced;
wherein the foam stabilizer is a silane stabilizer capable of improving the flame retardance of foam, preferably DC5950, DC 5986, DC 5990;
the catalyst is a low-volatility metal catalyst and an amine foaming catalyst, the metal catalyst is preferably an organic bismuth catalyst BiCAT8106, the low-volatility amine catalyst is preferably NE1070 and NE300, the low-volatility catalyst can react with isocyanate groups, VOC volatility is reduced, and the system has good fluidity during reaction;
the amino siloxane is a high molecular weight siloxane compound containing long silica chains and amino groups, the high molecular weight long silica chain siloxane has good hydrophobicity and can reduce the water absorption of polyurethane foam products, and the amino siloxane has amino groups and can quickly react with isocyanate groups and be fixed on the surfaces of molecular chains;
the addition of hydroxyl siloxane or micromolecular siloxane can cause the cell enlargement of polyurethane foam or foam collapse, the effect of foam cell enlargement and thickening caused by the addition of long carbon chain aminosiloxane is far less than that of hydroxyl siloxane or micromolecular siloxane, the possible reasons are that amino and isocyanate react quickly, aminosiloxane is fixed on a molecular chain quickly, the surface activity of siloxane is inhibited, and the effect of foam cell thickening caused by long carbon chain aminosiloxane can be compensated by an efficient foam stabilizer;
wherein the viscosity of the aminosilicone is 600-3500mPas, preferably KF-8021, KF-8002, KF-880 and KF-861;
the physical foaming agents are n-pentane, HFC-365mfc and HFC-365/227, the polyurethane foam with a compact skin can be obtained by adopting physical foaming, the compact skin has higher mechanical strength and can reduce the water absorption of the foam, the gas-phase thermal conductivity coefficient of the gas generated by the foaming of the physical foaming agents is lower than that of air or carbon dioxide, and the cavity of the foam can be filled with low thermal conductivity gas, so that the thermal insulation material with low thermal conductivity coefficient can be obtained;
the molecular weight of the polytetrahydrofuran diol is 1000-3000, and the PTMG1000, the PTMG2000 and the PTMG3000 are preferred, the polytetrahydrofuran diol has good mechanical strength and excellent hydrolysis resistance, and can improve the physical property and the damp-heat aging resistance of the heat-insulating polyurethane foam;
step two: isocyanate B component preparation step:
20kg of PTMEG2000 and 50KGMDI react in a reaction kettle at 75-85 ℃ for 2-3 hours, 30kg of toluene diisocyanate is added and stirred evenly to obtain an isocyanate component B;
step three: mixing prepolymers of a polyol A component and an isocyanate B component in a mixing ratio of 100:40, respectively injecting the mixtures into a charging bucket of a casting machine, adjusting the ratio, injecting the mixtures into a mold with the thickness of 5mm, and demolding for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack;
the heat-insulation polyurethane foam for the power battery pack is soft polyurethane foam, has low heat conductivity coefficient and better physical property, and can be used for heat preservation and impact resistance protection of the power battery pack for the new energy vehicle;
the power battery pack is arranged at the bottom of a vehicle, the battery pack can be subjected to different humidity and temperature, when the power battery pack is used under the conditions of high temperature, high humidity or wading, the heat conductivity coefficient of the heat-insulating material of the battery pack which does not meet the requirement can be increased due to water absorption or damp-heat aging, the heat conductivity coefficient of water is higher (0.59W/(m.K)), the heat conductivity coefficient of the high-water-absorption material can be increased due to the increase of the water content, the moisture absorption can be well reduced by adding vegetable oil polyol and amino siloxane with hydrophobic property, and the heat conductivity coefficient can be prevented from being increased in use;
new energy car is at the in-process of advancing, and power battery package bottom and outside can receive the impact of foreign object, and power battery package is soft polyurethane foam with thermal-insulated polyurethane foam, has better resilience, can reply very fast after suffering the foreign object and assaulting, and polyurethane foam has better mechanical properties simultaneously, can guarantee not receive the damage after suffering the foreign object and assaulting.
Example 2:
the invention provides a heat insulation polyurethane foam for a power battery pack and a preparation method thereof, wherein the preparation method comprises the following operation steps:
the method comprises the following steps: adding 29.3kg of vegetable oil polyol NX-9203,20.0kg of Sovermol 1052, 13.0kg of ethyl phosphate oligomer dihydric alcohol, 20.0kg of flame retardant FYROL PNX, 5.0kg of 1, 3-propanediol, 2.0kg of triethanolamine and 3.0kg of diethanolamine into a reaction kettle for stirring, then adding 0.04kg of BiCAT8106, 1.0kg of Z1070, 1.5kg of DC 5986 and 1.0kg of KF880, stirring for 2 hours at 25-30 ℃, adding 3kg of HFC-365/227, stirring for 1 hour, and sealing for storage to obtain a polyol A component;
step two: reacting 30KG of PTMEG2000 and 50KG MDI in a reaction kettle at 75-85 ℃ for 2-3 hours, adding 20KG of toluene diisocyanate, and uniformly stirring to obtain an isocyanate component B;
step three: and mixing the prepolymer of the polyol A component and the prepolymer of the isocyanate B component at a mixing ratio of 100:50, respectively injecting the mixture into a charging bucket of a casting machine, adjusting the ratio, injecting the mixture into a mold with the thickness of 5mm, and demolding the mold for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
Example 3:
the invention provides a heat insulation polyurethane foam for a power battery pack and a preparation method thereof, wherein the preparation method comprises the following operation steps:
the method comprises the following steps: adding 11.1kg of plant polyol NX-9208,10.5kg of Sovermol 1052, 19.3kg of ethyl phosphate oligomer dihydric alcohol, 31.2kg of flame retardant FYROL RDP, 13.5kg of Antiblaze WR-30-LV, 9.8kg of 1, 6-hexanediol and 2.0kg of diethanolamine into a reaction kettle for stirring, then adding 0.1kg of BiCAT8106, 0.1kg of NE300, 2.0kg of DC 5990 and 3.0kg of KF861, stirring for 2 hours at 25-30 ℃, adding 10kg of HFC-365mfc for stirring for 1 hour, and sealing for storage to obtain a polyol A component;
step two: reacting 15KG of PTMEG3000 and 60KG MDI in a reaction kettle at 75-85 ℃ for 2-3 hours, adding 25KG of toluene diisocyanate, and uniformly stirring to obtain an isocyanate component B;
step three: and mixing the prepolymer of the polyol A component and the prepolymer of the isocyanate B component at a mixing ratio of 100:45, respectively injecting the mixture into a charging bucket of a casting machine, adjusting the ratio, injecting the mixture into a mold with the thickness of 5mm, and demolding the mold for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
Example 4:
the invention provides a heat insulation polyurethane foam for a power battery pack and a preparation method thereof, wherein the preparation method comprises the following operation steps:
the method comprises the following steps: 20.0kg of vegetable oil modified polyol NX-9201,10kg of Sovermol 1005, 30.0kg of ethyl phosphate oligomer dihydric alcohol, 25.0kg of flame retardant FYROL RDP, 3.0kg of ethylene glycol and 3.0kg of triisopropanolamine are added into a reaction kettle for stirring, then 0.02kg of BiCAT8106, 1.5kg of NE1070, 0.5kg of DC5950 and 2.5kg of KF8021 are added into the reaction kettle for stirring for 2 hours at the temperature of 25-30 ℃, 6kg of n-pentane is added into the reaction kettle for stirring for 1 hour, and the mixture is sealed and stored to obtain a polyol A component;
step two: 20KG of PTMEG1000 and 70KG of MDI react for 2-3 hours in a reaction kettle at the temperature of 75-85 ℃,10KG of toluene diisocyanate is added and stirred evenly to obtain an isocyanate component B;
step three: and mixing the prepolymer of the polyol A component and the prepolymer of the isocyanate B component at a mixing ratio of 100:60, respectively injecting the mixture into a charging bucket of a casting machine, adjusting the ratio, injecting the mixture into a mold with the thickness of 5mm, and demolding the mold for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
Comparative example 1
The method comprises the following steps: 39.3kg of polyether polyol 330N,18.0kg of ethyl phosphate oligomer dihydric alcohol, 15.0kg of flame retardant SR-0270, 10.0kg of Antiblaze TL-10-ST,5.0kg of 1, 4-butanediol, 2.0kg of diethanolamine and 2.0kg of trimethylolpropane are added into a reaction kettle for stirring, then 0.04kg of BiCAT8106, 0.5kg of NE1070, 1.5kg of DC5950 and 2.0kg of KF8021 are added and stirred for 2 hours at the temperature of 25-30 ℃, 5kg of HFC-365mfc is added and stirred for 1 hour, and the mixture is sealed and stored to obtain a polyhydric alcohol A component;
step two: 20KG of PTMEG2000 and 50KG of MDI react for 2-3 hours at 75-85 ℃ in a reaction kettle, 30KG of toluene diisocyanate is added and stirred uniformly to obtain an isocyanate component B;
step three: and mixing the prepolymer of the polyol A component and the prepolymer of the isocyanate B component in a mixing ratio of 100:40, respectively injecting the mixture into a charging bucket of a casting machine, adjusting the ratio, injecting the mixture into a mold with the thickness of 5mm, and demolding for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
Comparative example 2
The method comprises the following steps: 39.3kg of vegetable oil polyol NX-9201,18.0kg of ethyl phosphate oligomer dihydric alcohol, 15.0kg of flame retardant SR-0270, 10.0kg of Antiblaze TL-10-ST,5.0kg of 1, 4-butanediol, 2.0kg of diethanolamine and 2.0kg of trimethylolpropane are added into a reaction kettle for stirring, then 0.04kg of BiCAT8106, 0.5kg of NE1070 and 1.5kg of DC5950 are added into the reaction kettle for stirring for 2 hours at 25-30 ℃, 5kg of HFC-365mfc is added into the reaction kettle for stirring for 1 hour, and the mixture is sealed and stored to obtain a polyol A component;
step two: 20KG of PTMEG2000 and 50KG of MDI react for 2-3 hours at 75-85 ℃ in a reaction kettle, 30KG of toluene diisocyanate is added and stirred uniformly to obtain an isocyanate component B;
step three: and mixing the prepolymer of the polyol A component and the prepolymer of the isocyanate B component in a mixing ratio of 100:40, respectively injecting the mixture into a charging bucket of a casting machine, adjusting the ratio, injecting the mixture into a mold with the thickness of 5mm, and demolding for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
Comparative example 3
The method comprises the following steps: 39.3kg of vegetable oil polyol NX-9201,18.0kg of ethyl phosphate oligomer dihydric alcohol, 15.0kg of flame retardant SR-0270, 10.0kg of Antiblaze TL-10-ST,20.0kg of magnesium hydroxide powder, 5.0kg of 1, 4-butanediol, 2.0kg of diethanolamine and 2.0kg of trimethylolpropane are added into a reaction kettle for stirring, then 0.04kg of BiCAT8106, 0.5kg of NE1070, 1.5kg of DC5950 and 2.0kg of KF8021 are added and stirred for 2 hours at the temperature of 25-30 ℃, 5kg of HFC-365mfc is added and stirred for 1 hour, and the mixture is sealed and stored to obtain a polyol A component;
step two: 20KG of PTMEG2000 and 50KG of MDI react for 2-3 hours at 75-85 ℃ in a reaction kettle, 30KG of toluene diisocyanate is added and stirred uniformly to obtain an isocyanate component B;
step three: and mixing the prepolymer of the polyol A component and the prepolymer of the isocyanate B component in a mixing ratio of 100:40, respectively injecting the mixture into a charging bucket of a casting machine, adjusting the ratio, injecting the mixture into a mold with the thickness of 5mm, and demolding for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
The performance tests are shown in Table 1
The heat conductivity coefficient test in Table 1 is according to standard GB/T10295-.
As can be seen from the examples and comparative examples:
compared with the embodiment 1, the polyether 330N is adopted for implementation, the vegetable oil polyol is not adopted, the thermal conductivity is obviously increased after aging for 1000 hours at 85 ℃ with 85% humidity and soaking in water for 96 hours, the polyether 330N contains ethylene oxide groups and has higher water absorption, after the foam prepared from the polyether 330N is prepared, the foam absorbs moisture in the air, so that the thermal conductivity is increased, the addition of the vegetable oil polyol improves the hydrophobicity of the foam heat-insulation polyurethane foam, the possibility of improving the thermal conductivity due to water absorption and moisture absorption is reduced, and meanwhile, the vegetable oil polyol has better humidity and heat aging resistance compared with the polyether polyol.
Compared with the example 1, the comparative example 2 does not adopt amino siloxane, the heat conductivity coefficient is obviously increased after the aging is carried out for 1000 hours at 85 ℃ under 85% humidity and the soaking is carried out for 96 hours in water, and the amino siloxane with large molecular weight is grafted into a molecular chain, so that the hydrophobicity of the heat-insulating polyurethane foam can be well increased.
Compared with the embodiment 1, the solid powder flame retardant magnesium hydroxide is added, so that the heat conductivity coefficient is obviously increased, the heat conductivity coefficient is obviously increased after the solid powder flame retardant magnesium hydroxide is aged for 1000 hours at 85 ℃ with 85% humidity and soaked in water for 96 hours, the solid powder flame retardant magnesium hydroxide has strong hygroscopicity, the opening property of foam is increased after the solid powder flame retardant magnesium hydroxide is added, the water absorption rate of the heat-insulation polyurethane foam is obviously increased after the solid powder flame retardant magnesium hydroxide is added, and the heat conductivity coefficient is improved.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (10)
1. The heat-insulating polyurethane foam for the power battery pack comprises a polyol A component and isocyanate B, and is characterized in that the polyol A component comprises the following components in parts by weight:
20-50 parts of vegetable oil modified polyol, 10-30 parts of flame retardant polyol, 20-45 parts of flame retardant, 3-10 parts of chain extender, 0.8-5.0 parts of cross-linking agent, 0.5-2.0 parts of foam stabilizer, 0.2-2.0 parts of catalyst, 1.0-3.O parts of aminosiloxane and 3-10 parts of physical foaming agent;
the isocyanate B component comprises the following components in parts by weight:
10-30 parts of toluene diisocyanate, 10-30 parts of polytetrahydrofuran diol and 50-70 parts of diphenylmethane diisocyanate;
the vegetable oil modified polyol is vegetable oil polyol with multiple functionality, and the functionality of the vegetable oil polyol is less than or equal to 3.
2. The heat-insulating polyurethane foam for power battery packs as claimed in claim 1, wherein the hydroxyl value of the vegetable oil polyol is 30-150 mgKOH.
3. The heat-insulating polyurethane foam for the power battery pack according to claim 1, wherein the flame-retardant polyol is a liquid flame retardant, the flame-retardant polyol contains phosphorus, nitrogen and halogen elements and also contains hydroxyl, and the hydroxyl value of the flame-retardant polyol is less than 200 mgKOH.
4. The heat-insulating polyurethane foam for the power battery pack according to claim 1, wherein: the flame retardant is a liquid flame retardant, and contains phosphorus, nitrogen and halogen elements.
5. The insulated polyurethane foam for the power battery pack according to claim 1, wherein the chain extender is a small-molecule diol and a small-molecule amine, the functionality of the cross-linking agent is not less than 3 small-molecule alcohol, and the functionality of the cross-linking agent is not less than 3 small-molecule amine.
6. The insulated polyurethane foam for power cell packages of claim 1, wherein the catalyst is a low volatility metal catalyst and an amine blowing catalyst.
7. The heat-insulating polyurethane foam for the power battery pack according to claim 1, wherein: the aminosilicone is a large molecular weight siloxane compound containing long silica chains containing amino groups, and the viscosity of the aminosilicone is 600-3500 mPas.
8. The heat-insulating polyurethane foam for the power battery pack according to claim 1, wherein: the physical foaming agent is n-pentane, HFC-365mfc and HFC-365/227.
9. The heat-insulating polyurethane foam for the power battery pack according to claim 1, wherein: the molecular weight of the polytetrahydrofuran diol is 1000-3000.
10. A preparation method of heat insulation polyurethane foam for a power battery pack is characterized by comprising the following steps: the method comprises the following operation steps:
the method comprises the following steps: the preparation method of the polyol A component comprises the following steps:
adding the vegetable oil polyol, the flame-retardant polyol, the flame retardant, the chain extender and the cross-linking agent into a reaction kettle, stirring, then adding the catalyst, the foam stabilizer and the aminosiloxane, stirring uniformly at 25-30 ℃, adding the physical foaming agent, continuously stirring uniformly, and then sealing and storing;
step two: isocyanate B component preparation step:
reacting the polytetrahydrofuran diol with diphenylmethane diisocyanate in a reaction kettle at the temperature of 75-85 ℃ for 2-3 hours, cooling to 40-50 ℃, and adding toluene diisocyanate to obtain a prepolymer of an isocyanate B component;
step three: and mixing the prepolymer of the polyol A component and the isocyanate B component at a mixing ratio of 100:40-60, respectively injecting into a charging bucket of a casting machine, adjusting the ratio, injecting into a mold, and demolding for 5-6min to obtain the heat-insulating polyurethane foam for the power battery pack.
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Application publication date: 20220215 |