CN115894853A - Preparation method and application of low-density low-heat-conduction polyurethane rigid foam - Google Patents
Preparation method and application of low-density low-heat-conduction polyurethane rigid foam Download PDFInfo
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- CN115894853A CN115894853A CN202211426456.5A CN202211426456A CN115894853A CN 115894853 A CN115894853 A CN 115894853A CN 202211426456 A CN202211426456 A CN 202211426456A CN 115894853 A CN115894853 A CN 115894853A
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- 239000006260 foam Substances 0.000 title claims abstract description 33
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 32
- 239000004814 polyurethane Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title description 6
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 14
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 14
- 229920000570 polyether Polymers 0.000 claims abstract description 14
- 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 12
- 239000003063 flame retardant Substances 0.000 claims abstract description 12
- 239000006261 foam material Substances 0.000 claims abstract description 12
- 229920005862 polyol Polymers 0.000 claims abstract description 12
- 150000003077 polyols Chemical class 0.000 claims abstract description 12
- 239000004088 foaming agent Substances 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 8
- 239000012948 isocyanate Substances 0.000 claims abstract description 7
- 150000002513 isocyanates Chemical group 0.000 claims abstract description 7
- 238000005829 trimerization reaction Methods 0.000 claims abstract description 5
- 150000001412 amines Chemical class 0.000 claims abstract description 4
- 125000003118 aryl group Chemical group 0.000 claims abstract description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 239000011496 polyurethane foam Substances 0.000 claims description 11
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 claims description 5
- RXYPXQSKLGGKOL-UHFFFAOYSA-N 1,4-dimethylpiperazine Chemical compound CN1CCN(C)CC1 RXYPXQSKLGGKOL-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 4
- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920001228 polyisocyanate Polymers 0.000 claims description 3
- 239000005056 polyisocyanate Substances 0.000 claims description 3
- KVMPUXDNESXNOH-UHFFFAOYSA-N tris(1-chloropropan-2-yl) phosphate Chemical compound ClCC(C)OP(=O)(OC(C)CCl)OC(C)CCl KVMPUXDNESXNOH-UHFFFAOYSA-N 0.000 claims description 3
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- HQUQLFOMPYWACS-UHFFFAOYSA-N tris(2-chloroethyl) phosphate Chemical group ClCCOP(=O)(OCCCl)OCCCl HQUQLFOMPYWACS-UHFFFAOYSA-N 0.000 claims description 2
- 239000004604 Blowing Agent Substances 0.000 claims 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims 1
- 239000001103 potassium chloride Substances 0.000 claims 1
- 235000011164 potassium chloride Nutrition 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- HHDUMDVQUCBCEY-UHFFFAOYSA-N 4-[10,15,20-tris(4-carboxyphenyl)-21,23-dihydroporphyrin-5-yl]benzoic acid Chemical compound OC(=O)c1ccc(cc1)-c1c2ccc(n2)c(-c2ccc(cc2)C(O)=O)c2ccc([nH]2)c(-c2ccc(cc2)C(O)=O)c2ccc(n2)c(-c2ccc(cc2)C(O)=O)c2ccc1[nH]2 HHDUMDVQUCBCEY-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- PWMWNFMRSKOCEY-UHFFFAOYSA-N 1-Phenyl-1,2-ethanediol Chemical compound OCC(O)C1=CC=CC=C1 PWMWNFMRSKOCEY-UHFFFAOYSA-N 0.000 description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000013256 coordination polymer Substances 0.000 description 2
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- FRCHKSNAZZFGCA-UHFFFAOYSA-N 1,1-dichloro-1-fluoroethane Chemical compound CC(F)(Cl)Cl FRCHKSNAZZFGCA-UHFFFAOYSA-N 0.000 description 1
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- PZBFGYYEXUXCOF-UHFFFAOYSA-N TCEP Chemical compound OC(=O)CCP(CCC(O)=O)CCC(O)=O PZBFGYYEXUXCOF-UHFFFAOYSA-N 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical compound FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229940094537 polyester-10 Drugs 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- RLJWTAURUFQFJP-UHFFFAOYSA-N propan-2-ol;titanium Chemical compound [Ti].CC(C)O.CC(C)O.CC(C)O.CC(C)O RLJWTAURUFQFJP-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N tetraisopropyl titanate Substances CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a low-density low-heat-conduction polyurethane rigid foam material which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: 5-30 parts of polyether polyol, 15-40 parts of aromatic polyester polyol, 5-15 parts of unsaturated bond polyester polyol and a flame retardant: 10-40 parts of foam stabilizer, 2-6 parts of foam stabilizer, 0.1-0.6 part of amine catalyst and trimerization catalyst: 1-8 parts of foaming agent: 10-20 parts; the component B is isocyanate. The low-density low-heat-conduction polyurethane rigid foam product prepared by the invention has the advantages of light foam weight, good heat conduction performance, good sound insulation performance and excellent flame retardant property, and can be used as a ceiling board.
Description
Technical Field
The invention relates to the field of polyurethane rigid foam, in particular to a preparation method and application of a low-density low-heat-conductivity polyurethane rigid foam material.
Background
The polyurethane rigid foam is an important polymer synthetic material, and has excellent physical and mechanical properties, chemical resistance, sound insulation and unique and excellent processing properties. In general, rigid polyurethane foams can be prepared from two components, namely isocyanate and conjugate polyether, wherein the conjugate polyether generally comprises polyether polyol, polyester polyol, a foaming agent, a catalyst and the like.
At present, in order to save raw material cost and ensure strength, part of polyurethane plate production plants have greater requirements on low-density polyurethane rigid foam. Meanwhile, under the environment of energy conservation and emission reduction, the heat conductivity coefficient of the polyurethane plate is reduced, so that the energy loss in the use process is reduced. Under the condition of ensuring the foam strength, how to reduce the foam density as much as possible without losing the heat conduction becomes a technical challenge in the polyurethane rigid foam industry.
Chinese published patent CN113896860A discloses a low-density polyurethane rigid foam material using total water as a foaming agent, but the overflow rate of carbon dioxide generated by the reaction of water and isocyanate in the total water foam is high, and the dimensional stability of the foam is poor.
HCFC-141b and other foaming agents which have the effect of destroying the ozone layer are gradually banned; HFC-245fa and LBA are high in equivalent lattice and not beneficial to low cost requirements.
In conclusion, a polyurethane rigid foam composite material with a high cost performance is urgently needed, the problems of high cost, environmental pollution and poor heat conduction can be solved, and the prepared polyurethane rigid foam material has excellent performances.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a polyurethane rigid foam with low density and low thermal conductivity suitable for the existing plate and a preparation method thereof. By introducing the polyester with unsaturated bonds and benzene ring structures, the unsaturated bonds can form an interpenetrating network when isocyanate and hydroxyl react, the strength is improved, and meanwhile, the high molecular network is tighter, and the foam holes are finer and finer, so that the heat conduction attenuation is reduced. The prepared polyurethane rigid foam product has low foam density, low heat conductivity coefficient, good strength, good sound insulation performance and certain flame retardant property.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-density and low-heat-conduction polyurethane rigid foam material comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 100:130 to 250;
wherein, the component A comprises the following components in parts by weight:
wherein the component B is isocyanate.
The functionality of the polyether polyol is 2-5, the hydroxyl value is 100-600mgKOH/g, the viscosity is 50-4000mPa.s, and the water content is less than 0.1%;
in a preferred embodiment of the present invention, the polyether polyol is a product obtained by reacting trifunctional glycerin and/or difunctional diethylene glycol, etc. as an initiator.
The polyester polyol is aromatic polyester polyol, the functionality is 2-6, the hydroxyl value is 150-380mgKOH/g, the viscosity is 8000-15000mPa.s, and the water content is less than 0.1%;
in a preferred embodiment of the present invention, the polyester polyol is based on a product obtained by reacting difunctional benzoic acid and/or tetrafunctional pyromellitic dianhydride or the like with ethylene glycol, butanediol or the like.
The hydroxyl value of the unsaturated bond polyester polyol is 150-350mgKOH/g, and the structural formula is as follows:
wherein n is the degree of polymerization, n is more than or equal to 2 and less than or equal to 5,
the polyester polyol with unsaturated bonds is prepared by the over-esterification reaction of itaconic acid and phenylethanediol under the action of a catalyst
The reaction process is as follows:
in one embodiment, the molar ratio of itaconic acid to phenylethanediol is 1.1 to 1.3, the catalyst is one or more of di-n-butylamine, zinc oxide, dibutyltin dilaurate and tetraisopropyl titanate, the reaction temperature is 140-180 ℃, and the reaction time is 8-10 hours.
In a preferred embodiment of the invention, the flame retardant is tris (2-chloroethyl) phosphate, i.e. TCEP, or tris (1-chloro-2-propyl) phosphate, i.e. TCPP.
The foaming agent is a mixture of water and alkane, and the mixing mass ratio of the water to the alkane is 1.
In a preferred embodiment of the present invention, the foam stabilizer is a polysiloxane-polyoxyalkylene ether block copolymer.
In a preferred embodiment of the present invention, the amine catalyst is a high activity gel catalyst, including but not limited to one or more of pentamethyldiethylenetriamine, N-dimethylcyclohexylamine, triethylenediamine, triethylamine, 1, 4-dimethylpiperazine, N-dimethylbenzylamine and bisdimethylaminoethylether, preferably one or more of pentamethyldiethylenetriamine, N-dimethylbenzylamine, N-dimethylcyclohexylamine.
In a preferred embodiment of the present invention, the trimerization catalyst is a metal potassium salt catalyst.
In a preferred embodiment of the present invention, the B component is selected from one or more of polymeric MDI and liquefied modified MDI, preferably one or more of PM400 from Van Waals chemical company, 44V20 from Bayer company and M50S from BASF company.
A preparation method of a low-density low-heat-conduction polyurethane rigid foam material comprises the following steps:
s1, uniformly mixing a polyol combination, a flame retardant, a foam stabilizer, a catalyst and a foaming agent to prepare a component A;
and S2, mixing the component A obtained in the step S1 with the component B polyisocyanate, and foaming at high pressure to obtain the polyurethane rigid foam.
In a preferred embodiment of the present invention, the conditions of the high pressure foaming process of the present invention are: the material temperature is 25-35 ℃, the gauge pressure is 100-150bar, the mold temperature is 50-70 ℃, and the demolding time is 5-15min.
In a preferred embodiment of the invention, the density of the rigid polyurethane foam is less than or equal to 31kg/m 3 The compression strength is more than or equal to 150Kpa,the heat conductivity coefficient is less than or equal to 21mw/m.K.
The invention also relates to the application of the low-density low-heat-conduction polyurethane rigid foam material in heat insulation materials such as ceiling boards, refrigerators, water heaters and the like.
The invention has the beneficial effects that:
firstly, the low-density low-heat-conduction polyurethane rigid foam provided by the invention forms an interpenetrating network by compounding polyether polyol, aromatic polyester polyol and unsaturated bond polyester polyol, improves the crosslinking density and the fineness of foam pores, and ensures low heat conduction and high compressive strength and modulus under the condition of low density.
Secondly, the invention uses water and alkane to form the composite foaming agent, which can not only meet the environmental protection requirement, but also reduce the cost, and simultaneously, the water reacts with isocyanate to generate carbamido, and the strength can also be improved.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Part of raw material sources are as follows:
PM400: wanhua chemical group Ltd
Sucrose and diethylene glycol mixed starting polyether polyol: R4110B (viscosity at 25 ℃ 3000 mPas, functionality 4, hydroxyl number 440 mgKOH/g), van der Waals Chemie (Nicoti) Warwei polyurethane Co., ltd.
Glycerol-initiated polyether polyol: a310 (viscosity 3000 mPas at 25 ℃, functionality 3, hydroxyl number 168 mgKOH/g), wavley polyurethane, inc., wanhua chemical (Nicoti).
Diethylene glycol polyether polyol: PEG200 (viscosity 50 mPas at 25 ℃, functionality 2, hydroxyl number 570 mgKOH/g), wanhua chemistry.
JZ035 (viscosity at 25 ℃ of 14000 mPa.s, functionality of 2, hydroxyl value of 240 mgKOH/g), van Waals Chemicals (Nicoti) polyurethane Co., ltd.
Unsaturated bond polyester polyol (functionality of 2, hydroxyl value of 180mgKOH/g, viscosity of 15000 mPas)
Flame retardant: TCPP is tris (1-chloro-2-propyl) phosphate.
Foam stabilizer: l6900, momentive
Gel catalyst: pentamethyldiethylenetriamine, yongchu specialty Chemicals (Shanghai) Co., ltd
Trimerization catalyst: dabcoPT304, air Product
Foaming agent: CP, shanghai Honpu chemical science and technology Limited.
Examples 1 to 4, comparative example 1
The amounts (parts by weight) of the respective components in the examples and comparative examples are shown in Table 1.
The preparation method of the polyurethane rigid foam material comprises the following steps:
s1, uniformly mixing a polyol combination, a flame retardant, a foam stabilizer, a catalyst and a foaming agent to prepare a component A;
s2, mixing the component A with the component B polyisocyanate, and foaming at high pressure to prepare polyurethane rigid foam;
the conditions of the high-pressure foaming process are as follows: the material temperature is 30 ℃, the gauge pressure is 100bar, the mold temperature is 60 ℃, and the demolding time is 10min.
TABLE 1
| Composition (I) | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example |
| R4110B, polyether | 5 | 0 | 5 | 5 | 5 |
| A310, polyether | 5 | 5 | 5 | 0 | 5 |
| PEG200, polyether | 8 | 8 | 8 | 8 | 8 |
| JZ035, polyesters | 30 | 30 | 25 | 40 | 40 |
| Unsaturated polyester | 10 | 15 | 15 | 5 | 0 |
| TCPP, flame retardant | 25 | 25 | 25 | 25 | 25 |
| L6900, homogenizing agent | 2 | 2 | 2 | 2 | 2 |
| Pentamethyldiethylenetriamine, amine catalyst | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| DabcoPT304, trimerization catalyst | 2.5 | 2.4 | 2.3 | 2.4 | 2.5 |
| CP | 10 | 9.8 | 10.5 | 9.5 | 10 |
| Water (W) | 2 | 2 | 2 | 2 | 2 |
| PM400 | 170 | 170 | 170 | 170 | 170 |
The rigid polyurethane foams obtained in the above examples and comparative examples were subjected to a cutting test and the properties were measured as shown in Table 2:
TABLE 2
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example | |
| Foam core Density (kg/m) 3 ) | 30.4 | 30.2 | 30.3 | 30.3 | 30.2 |
| Compressive Strength (KPa) | 157 | 161 | 170 | 152 | 135 |
| Thermal conductivity (mw/m.k) | 20.7 | 20.3 | 20 | 21 | 22 |
| Oxygen index | 26.3 | 26.6 | 27 | 26 | 25 |
As can be seen from the above table, the example polyurethane foams had a density of not more than 31kg/m 3 In the case of a compressive strength of greater than 150KPa, a thermal conductivity of not more than 21mw/m.K, and an oxygen index of greater than 26.
The existing ceiling board is made of XPS material, has heavy mass, high heat conductivity coefficient and general flame retardant property, is not beneficial to the national requirements on low-carbon environment-friendly buildings, and the low-density polyurethane rigid foam has the characteristics of light weight, good flame retardant property and good heat insulation, and can be used for replacing the low-density polyurethane rigid foam.
The invention is not limited to the embodiments described above, and any obvious alternative is within the scope of the invention without departing from the inventive concept thereof.
Claims (10)
1. The low-density low-heat-conduction polyurethane rigid foam material comprises a component A and a component B, and is characterized in that the mass ratio of the component A to the component B is 100:130 to 250;
wherein, the component A comprises the following components in parts by weight:
wherein the component B is isocyanate.
2. The rigid polyurethane foam material according to claim 1, wherein the polyether polyol has a functionality of 2 to 5, a hydroxyl value of 100 to 600mgKOH/g, and a viscosity of 50 to 4000mPa.s.
3. The rigid polyurethane foam material according to claim 1 or 2, wherein the polyester polyol is an aromatic polyester polyol, has a functionality of 2 to 6, a hydroxyl value of 150 to 380mgKOH/g, and a viscosity of 8000 to 15000mPa.s.
4. The rigid polyurethane foam material according to any one of claims 1 to 3, wherein the unsaturation is present in the foam material
And bond polyester polyol has a hydroxyl value of 150-350mgKOH/g and the structural formula is as follows:
preferably, where 2. Ltoreq. N.ltoreq.5.
5. The rigid polyurethane foam material according to any one of claims 1 to 4, wherein the blowing agent is a mixture of water and an alkane, preferably in a mass ratio of 1.
6. The rigid polyurethane foam material according to any one of claims 1 to 5, wherein the flame retardant is tris (2-chloroethyl) phosphate and/or tris (1-chloro-2-propyl) phosphate;
the foam stabilizer is polysiloxane-polyoxyalkylene ether block copolymer.
7. The rigid polyurethane foam material according to any one of claims 1 to 6, wherein the amine catalyst is one or more of pentamethyldiethylenetriamine, N-dimethylcyclohexylamine, triethylenediamine, triethylamine, 1, 4-dimethylpiperazine, N-dimethylbenzylamine, and bisdimethylaminoethylether;
the trimerization catalyst is a metal sylvite catalyst.
8. The rigid polyurethane foam material according to any one of claims 1 to 7, wherein the B component is selected from one or more of polymeric MDI and liquefied modified MDI, preferably one or more of PM400 of Wanhua chemistry, 44V20 of Bayer and M50S of BASF.
9. A method for preparing the low-density low-thermal-conductivity polyurethane rigid foam material according to any one of claims 1 to 8, comprising the following steps:
s1, uniformly mixing polyol, a flame retardant, a foam stabilizer, a catalyst and a foaming agent to prepare a component A;
s2, mixing the component A obtained in the step S1 with the component B polyisocyanate, and foaming at high pressure to obtain the polyurethane rigid foam;
preferably, the conditions of the high-pressure foaming process are as follows: the material temperature is 25-35 ℃, the gauge pressure is 100-150bar, the mold temperature is 50-70 ℃, and the demolding time is 5-15min.
10. Use of the low-density low-thermal-conductivity polyurethane rigid foam material according to any one of claims 1 to 9 in a thermal insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426456.5A CN115894853A (en) | 2022-11-15 | 2022-11-15 | Preparation method and application of low-density low-heat-conduction polyurethane rigid foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211426456.5A CN115894853A (en) | 2022-11-15 | 2022-11-15 | Preparation method and application of low-density low-heat-conduction polyurethane rigid foam |
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