CN117757253A - Polyurethane heat-insulating pipe and preparation process thereof - Google Patents
Polyurethane heat-insulating pipe and preparation process thereof Download PDFInfo
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- CN117757253A CN117757253A CN202410018691.1A CN202410018691A CN117757253A CN 117757253 A CN117757253 A CN 117757253A CN 202410018691 A CN202410018691 A CN 202410018691A CN 117757253 A CN117757253 A CN 117757253A
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 29
- 239000004814 polyurethane Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000004321 preservation Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000012763 reinforcing filler Substances 0.000 claims abstract description 25
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 19
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 19
- 239000010452 phosphate Substances 0.000 claims abstract description 19
- 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 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 16
- 239000003063 flame retardant Substances 0.000 claims abstract description 16
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 12
- 229920000570 polyether Polymers 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
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 claims abstract description 11
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 11
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- 239000000047 product Substances 0.000 claims description 14
- 239000004793 Polystyrene Substances 0.000 claims description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 10
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000004005 microsphere Substances 0.000 claims description 10
- 229920002223 polystyrene Polymers 0.000 claims description 10
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 claims description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000007795 chemical reaction product Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- -1 2, 5-dihydroxyphenyl Chemical group 0.000 claims description 3
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 3
- 239000007983 Tris buffer Substances 0.000 claims description 3
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000001384 succinic acid Substances 0.000 claims description 3
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 239000012621 metal-organic framework Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 4
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- OQTFUSSSBHKJGE-UHFFFAOYSA-N oxaphosphinin-6-one Chemical compound O=C1C=CC=PO1 OQTFUSSSBHKJGE-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Abstract
The invention discloses a polyurethane heat-insulating pipe and a preparation process thereof, wherein the heat-insulating pipe comprises the following components in parts by weight: 110-130 parts of polyether polyol, 70-80 parts of polyethylene glycol, 150-180 parts of polymethylene polyphenyl isocyanate, 3-7 parts of silane coupling agent, 9-19 parts of heat preservation reinforcing filler, 3-5 parts of dibutyl tin dilaurate, 1-5 parts of phosphate flame retardant, 3-5 parts of pentane and 2-5 parts of water; the added heat preservation reinforcing filler is a metal organic frame material, has a hierarchical porous hollow structure, and has excellent heat preservation performance; in addition, the special octahedral hollow physical structure of the metal organic framework material enables the metal organic framework material to have excellent mechanical properties, higher strength, deformation performance and superior specific strength, so that the pipe has more excellent heat preservation and insulation performance, good mechanical strength and greatly prolonged service life and application range.
Description
Technical Field
The invention belongs to the technical field of plastic pipeline manufacturing, and particularly relates to a polyurethane heat-insulating pipe and a preparation process thereof.
Background
The polyurethane heat-insulating pipe is formed by foaming high-functional polyether polyol combination materials and polymethylpolyphenyl polyisocyanate serving as raw materials through chemical reaction. The polyurethane heat-insulating pipe is used for heat-insulating and cold-insulating engineering of various pipelines in the indoor and outdoor, central heating pipelines, central air-conditioning pipelines, industrial pipelines of chemical industry, medicine and the like.
Because the strength of the polyurethane foam material is smaller, the ageing resistance is general, and the problem that the heat preservation performance is rapidly reduced when the polyurethane foam material is used in a severe environment occurs. The existing solution mostly adopts the addition of ultraviolet resistant agent and various synergistic fillers to improve the performance of polyurethane heat-insulation pipes, but can not fundamentally solve the functional defects caused by the structure and molecular performance of the matrix, and has the disadvantages of poor enhancement effect, short maintenance time and high preparation cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a polyurethane heat-insulating pipe and a preparation process thereof.
In order to solve the technical problems, the invention adopts the following technical scheme: the polyurethane heat-insulating pipe comprises the following components in parts by weight:
110-130 parts of polyether polyol, 70-80 parts of polyethylene glycol, 150-180 parts of polymethylene polyphenyl isocyanate, 3-7 parts of silane coupling agent, 9-19 parts of heat preservation reinforcing filler, 3-5 parts of dibutyl tin dilaurate, 1-5 parts of phosphate flame retardant, 3-5 parts of pentane and 2-5 parts of water.
The preparation method of the heat preservation reinforcing filler comprises the following steps:
step 1:0.92ml acrylic acid, 21ml styrene, 1.1ml methacrylate and 0.49. 0.49gNH 4 HCO 3 Sequentially adding the mixture into 100ml of deionized water under stirring, heating to 70 ℃, and then adding 0.53g of ammonium persulfate; heating to 80deg.C and holding for 12 hr, cooling to room temperature, centrifuging, washing with water, and drying to obtain productA polystyrene microsphere;
step 2: adding 0.3g and 5.5g of 2-methylimidazole of the polystyrene microsphere obtained in the step 1 into 20ml of deionized water, performing ultrasonic treatment for 30min to obtain a mixture, and slowly adding 3ml of an aqueous solution containing 0.77mmol of zirconium nitrate into the mixture; stirring for 6h at room temperature, centrifuging, washing and drying the reaction product to obtain a second product;
step 3: and 2, washing the product II in the step 2 with tetrahydrofuran for 3-5 times, and drying to obtain the heat-preservation reinforcing filler.
The silane coupling agent can be any one of gamma-methacryloxypropyl trimethoxy silane, bis- (gamma-triethoxysilylpropyl) tetrasulfide and vinyl triethoxysilane.
The phosphate flame retardant may be any one of tris (1-oxo-1-phospha-2, 6, 7-trioxabicyclo [2, 2] octane-4-methylene) phosphate, 10- (2, 5-dihydroxyphenyl) -10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide, [ (6-oxo- (6H) -dibenzo- (CE) (1, 2) -oxaphospha-hex-6-one) methyl ] -succinic acid.
The invention also provides a preparation process of the polyurethane heat-insulating pipe, which comprises the following steps:
step 1: heating polyethylene glycol to melt, adding heat preservation reinforcing filler, mixing at 1000r/min for 6-10min, adding water, and stirring for 6-10min to obtain a first mixture;
step 2: continuously adding polyether polyol, a silane coupling agent, dibutyl tin dilaurate and a phosphate flame retardant into the mixture 1, stirring for 20-30min at the rotating speed of 1000r/min, and continuously adding pentane and stirring for 5min to obtain a mixture 2;
step 3: adding polymethylene polyphenyl isocyanate into the mixture 2, stirring for 5s at a rotating speed of 2000r/min, then rapidly injecting into a mould, and reacting for 1-3h at 100-150 ℃ to obtain the polyurethane heat-insulation pipe.
Advantageous effects
The polyurethane heat-insulating pipe provided by the invention is characterized in that the added heat-insulating reinforcing filler is a metal organic frame material, and has a hierarchical porous hollow structure, and the structure has excellent heat-insulating performance; in addition, the special octahedral hollow physical structure of the metal organic framework material enables the metal organic framework material to have excellent mechanical properties, higher strength, deformation performance and superior specific strength, so that the pipe has more excellent heat preservation and insulation performance, good mechanical strength and greatly prolonged service life and application range.
Detailed Description
For a further understanding of the present invention, preferred embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention, and are not limiting of the claims of the invention.
Example 1
A polyurethane insulation pipe, which consists of the following components by weight:
110 parts of polyether polyol, 70 parts of polyethylene glycol, 150 parts of polymethylene polyphenyl isocyanate, 3 parts of silane coupling agent, 9 parts of heat preservation reinforcing filler, 3 parts of dibutyl tin dilaurate, 1 part of phosphate flame retardant, 3 parts of pentane and 2 parts of water.
The preparation method of the heat preservation reinforcing filler comprises the following steps:
step 1:0.92ml acrylic acid, 21ml styrene, 1.1ml methacrylate and 0.49. 0.49gNH 4 HCO 3 Sequentially adding the mixture into 100ml of deionized water under stirring, heating to 70 ℃, and then adding 0.53g of ammonium persulfate; heating to 80 ℃ and keeping for 12 hours, cooling to room temperature, centrifuging, washing with water, and drying to obtain a product, namely polystyrene microspheres;
step 2: adding 0.3g and 5.5g of 2-methylimidazole of the polystyrene microsphere obtained in the step 1 into 20ml of deionized water, performing ultrasonic treatment for 30min to obtain a mixture, and slowly adding 3ml of an aqueous solution containing 0.77mmol of zirconium nitrate into the mixture; stirring for 6h at room temperature, centrifuging, washing and drying the reaction product to obtain a second product;
step 3: and 2, washing the product II in the step 2 with tetrahydrofuran for 3 times, and drying to obtain the heat-preservation reinforcing filler.
The silane coupling agent is gamma-methacryloxypropyl trimethoxy silane, and the phosphate flame retardant is tris (1-oxo-1-phospha-2, 6, 7-trioxabicyclo [2, 2] octane-4-methylene) phosphate.
A preparation process of a polyurethane heat-insulating pipe comprises the following steps:
step 1: heating polyethylene glycol to melt, adding heat preservation reinforcing filler, mixing at 1000r/min for 6min, adding water, and stirring for 6min to obtain a first mixture;
step 2: continuously adding polyether polyol, a silane coupling agent, dibutyl tin dilaurate and a phosphate flame retardant into the mixture 1, stirring for 20min at the rotating speed of 1000r/min, and continuously adding pentane and stirring for 5min to obtain a mixture 2;
step 3: adding polymethylene polyphenyl isocyanate into the mixture 2, stirring for 5s at a rotating speed of 2000r/min, quickly injecting into a mould, and reacting for 3h at 100 ℃ to obtain the polyurethane heat-insulating pipe.
Example 2
A polyurethane insulation pipe, the pipe comprising by weight:
120 parts of polyether polyol, 75 parts of polyethylene glycol, 165 parts of polymethylene polyphenyl isocyanate, 5 parts of silane coupling agent, 14 parts of heat preservation reinforcing filler, 4 parts of dibutyl tin dilaurate, 3 parts of phosphate flame retardant, 4 parts of pentane and 3.5 parts of water. The preparation method of the heat preservation reinforcing filler comprises the following steps:
step 1:0.92ml acrylic acid, 21ml styrene, 1.1ml methacrylate and 0.49. 0.49gNH 4 HCO 3 Sequentially adding the mixture into 100ml of deionized water under stirring, heating to 70 ℃, and then adding 0.53g of ammonium persulfate; heating to 80 ℃ and keeping for 12 hours, cooling to room temperature, centrifuging, washing with water, and drying to obtain a product, namely polystyrene microspheres;
step 2: adding 0.3g and 5.5g of 2-methylimidazole of the polystyrene microsphere obtained in the step 1 into 20ml of deionized water, performing ultrasonic treatment for 30min to obtain a mixture, and slowly adding 3ml of an aqueous solution containing 0.77mmol of zirconium nitrate into the mixture; stirring for 6h at room temperature, centrifuging, washing and drying the reaction product to obtain a second product;
step 3: and 2, washing the product II in the step 2 with tetrahydrofuran for 3-5 times, and drying to obtain the heat-preservation reinforcing filler.
The silane coupling agent is bis- (gamma-triethoxysilylpropyl) tetrasulfide, and the phosphate flame retardant is 10- (2, 5-dihydroxyphenyl) -10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide.
A preparation process of a polyurethane heat-insulating pipe comprises the following steps:
step 1: heating polyethylene glycol to melt, adding heat preservation reinforcing filler, mixing at 1000r/min for 8min, adding water, and stirring for 8min to obtain a first mixture;
step 2: continuously adding polyether polyol, a silane coupling agent, dibutyl tin dilaurate and a phosphate flame retardant into the mixture 1, stirring for 25min at the rotating speed of 1000r/min, and continuously adding pentane and stirring for 5min to obtain a mixture 2;
step 3: adding polymethylene polyphenyl isocyanate into the mixture 2, stirring for 5s at a rotating speed of 2000r/min, then rapidly injecting into a mould, and reacting for 2h at 130 ℃ to obtain the polyurethane heat-insulating pipe.
Example 3
A polyurethane insulation pipe, the pipe comprising by weight:
130 parts of polyether polyol, 80 parts of polyethylene glycol, 180 parts of polymethylene polyphenyl isocyanate, 7 parts of silane coupling agent, 19 parts of heat preservation reinforcing filler, 5 parts of dibutyl tin dilaurate, 5 parts of phosphate flame retardant, 5 parts of pentane and 5 parts of water.
The silane coupling agent is vinyl triethoxysilane, and the phosphate flame retardant is [ (6-oxy- (6H) -dibenzo- (CE) (1, 2) -oxaphosphorin-6-one) methyl ] -succinic acid.
The preparation method of the heat preservation reinforcing filler comprises the following steps:
step 1:0.92ml acrylic acid, 21ml styrene, 1.1ml methacrylate and 0.49. 0.49gNH 4 HCO 3 Sequentially adding the mixture into 100ml of deionized water under stirring, heating to 70 ℃, and then adding 0.53g of ammonium persulfate; heating to 80 ℃ and keeping for 12 hours, cooling to room temperature, centrifuging, washing with water, and drying to obtain a product, namely polystyrene microspheres;
step 2: adding 0.3g and 5.5g of 2-methylimidazole of the polystyrene microsphere obtained in the step 1 into 20ml of deionized water, performing ultrasonic treatment for 30min to obtain a mixture, and slowly adding 3ml of an aqueous solution containing 0.77mmol of zirconium nitrate into the mixture; stirring for 6h at room temperature, centrifuging, washing and drying the reaction product to obtain a second product;
step 3: and 2, washing the product II in the step 2 with tetrahydrofuran for 3-5 times, and drying to obtain the heat-preservation reinforcing filler.
A preparation process of a polyurethane heat-insulating pipe comprises the following steps:
step 1: heating polyethylene glycol to melt, adding heat preservation reinforcing filler, mixing at 1000r/min for 10min, adding water, and stirring for 10min to obtain a first mixture;
step 2: continuously adding polyether polyol, a silane coupling agent, dibutyl tin dilaurate and a phosphate flame retardant into the mixture 1, stirring for 30min at the rotating speed of 1000r/min, and continuously adding pentane and stirring for 5min to obtain a mixture 2;
step 3: adding polymethylene polyphenyl isocyanate into the mixture 2, stirring for 5s at a rotating speed of 2000r/min, then rapidly injecting into a mould, and reacting for 1h at 150 ℃ to obtain the polyurethane heat-insulating pipe.
Comparative example 1
In this comparative example, the insulation reinforcing filler was absent as compared with example 2, except that example 2 was used.
A preparation process of a polyurethane heat-insulation pipe is the same as that of the embodiment 2.
The polyurethane insulating pipes prepared in each example and comparative example were subjected to performance detection, and the detection results are as follows:
TABLE 1 Properties of polyurethane insulation pipes prepared in examples and comparative examples
Note that: the measurement of the thermal conductivity is calculated by measuring the temperature of the sample at different times by using a non-contact infrared thermometer.
The data in table 1 shows that after the heat preservation reinforcing filler is added, the heat conductivity coefficient and the yield strength of the pipe are obviously improved, so that the strength and the heat preservation performance of the pipe are improved.
Claims (4)
1. The polyurethane heat-insulating pipe is characterized by comprising the following components in parts by weight:
110-130 parts of polyether polyol, 70-80 parts of polyethylene glycol, 150-180 parts of polymethylene polyphenyl isocyanate, 3-7 parts of silane coupling agent, 9-19 parts of heat preservation reinforcing filler, 3-5 parts of dibutyl tin dilaurate, 1-5 parts of phosphate flame retardant, 3-5 parts of pentane and 2-5 parts of water;
the preparation method of the heat preservation reinforcing filler comprises the following steps:
step 1:0.92ml acrylic acid, 21ml styrene, 1.1ml methacrylate and 0.49. 0.49gNH 4 HCO 3 Sequentially adding the mixture into 100ml of deionized water under stirring, heating to 70 ℃, and then adding 0.53g of ammonium persulfate; heating to 80 ℃ and keeping for 12 hours, cooling to room temperature, centrifuging, washing with water, and drying to obtain a product, namely polystyrene microspheres;
step 2: adding 0.3g and 5.5g of 2-methylimidazole of the polystyrene microsphere obtained in the step 1 into 20ml of deionized water, performing ultrasonic treatment for 30min to obtain a mixture, and slowly adding 3ml of an aqueous solution containing 0.77mmol of zirconium nitrate into the mixture; stirring for 6h at room temperature, centrifuging, washing and drying the reaction product to obtain a second product;
step 3: and 2, washing the product II in the step 2 with tetrahydrofuran for 3-5 times, and drying to obtain the heat-preservation reinforcing filler.
2. The polyurethane insulating tube according to claim 1, wherein the silane coupling agent is any one of gamma-methacryloxypropyl trimethoxysilane, bis- (gamma-triethoxysilylpropyl) tetrasulfide, and vinyltriethoxysilane.
3. The polyurethane insulating tube according to claim 1, wherein the phosphate flame retardant is any one of tris (1-oxo-1-phospha-2, 6, 7-trioxabicyclo [2, 2] octane-4-methylene) phosphate, 10- (2, 5-dihydroxyphenyl) -10-hydro-9-oxa-10-phosphaphenanthrene-10-oxide, [ (6-oxo- (6H) -dibenzo- (CE) (1, 2) -oxaphospha-hex-6-one) methyl ] -succinic acid.
4. A process for preparing a polyurethane insulation pipe according to any one of claims 1 to 3, comprising the steps of:
step 1: heating polyethylene glycol to melt, adding heat preservation reinforcing filler, mixing at 1000r/min for 6-10min, adding water, and stirring for 6-10min to obtain a first mixture;
step 2: continuously adding polyether polyol, a silane coupling agent, dibutyl tin dilaurate and a phosphate flame retardant into the mixture I, stirring for 20-30min at the rotating speed of 1000r/min, and continuously adding pentane and stirring for 5min to obtain a mixture II;
step 3: adding polymethylene polyphenyl isocyanate into the mixture II, stirring for 5s at the rotating speed of 2000r/min, then rapidly injecting into a mould, and reacting for 1-3h at the temperature of 100-150 ℃ to obtain the polyurethane heat-insulating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410018691.1A CN117757253A (en) | 2024-01-05 | 2024-01-05 | Polyurethane heat-insulating pipe and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410018691.1A CN117757253A (en) | 2024-01-05 | 2024-01-05 | Polyurethane heat-insulating pipe and preparation process thereof |
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| Publication Number | Publication Date |
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| CN117757253A true CN117757253A (en) | 2024-03-26 |
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| CN202410018691.1A Pending CN117757253A (en) | 2024-01-05 | 2024-01-05 | Polyurethane heat-insulating pipe and preparation process thereof |
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| Country | Link |
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- 2024-01-05 CN CN202410018691.1A patent/CN117757253A/en active Pending
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