CN107868218A - A kind of pipe insulation polyurethane hard bubble composite material and preparation method thereof - Google Patents
A kind of pipe insulation polyurethane hard bubble composite material and preparation method thereof Download PDFInfo
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- CN107868218A CN107868218A CN201711349260.XA CN201711349260A CN107868218A CN 107868218 A CN107868218 A CN 107868218A CN 201711349260 A CN201711349260 A CN 201711349260A CN 107868218 A CN107868218 A CN 107868218A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/14—Manufacture of cellular products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2101/00—Manufacture of cellular products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a kind of polyurethane hard bubble composite material.This polyurethane hard bubble composite material is used to continuously spray quick pushing manipulation production polyurethane thermal pipe, including isocyanates component A and polymerized polyalcohol B component, and component A and B component mass ratio are 1~1.5:1, B component includes monomeric polyol and auxiliary agent, wherein auxiliary agent includes thinner, catalyst, foam stabiliser and foaming agent, on the basis of the present invention is characterized in that by the use of water as foaming agent, alkanone type organic is also selected as thinner, using the combination material of the present invention as raw material, by continuously spray that quick pushing manipulation produces pipeline thermal conductivity factor is low, Density Distribution is good, while production cost can be saved, improve production efficiency.
Description
Technical field
The present invention relates to a kind of polyurethane hard bubble composite material for continous way spray quick pushing manipulation production utilidor, belong to hard bubble
Insulating tube production field.
Background technology
The heat-insulation layer of general concentrated supply of heating in the city pipeline must be using heat-proof quality is good, nonhygroscopic, service life is long, maintenance
The low insulation material of expense, hard polyurethane foams are widely adopted because that can meet these harsh requirements.
Current pipeline production technology is mainly casting method production, and patent CN103819644A discloses a kind of casting method
The method for producing direct-buried thermal insulation pipe, this method production efficiency is relatively low, and crosses and fill bigger, the waste to polyurethane foam material
It is bigger, pour it is larger to the tension force of polyethylene outer protective pipe (PE), therefore PE thickness with the production of spray quick pushing manipulation compared to also it is thick a lot.
Patent CN103159908A discloses a kind of method of spraying process prefabricated direct-buried thermal insulation pipe, and this method can replace tradition
Casting method produces insulating tube, but using HCFC-141B as foaming agent, not environmentally.
Patent CN101039979A discloses a kind of method that pentamethylene makes polyurethane pipeline for foaming agent, and this method reaches
To the purpose for substituting HCFC-141B, but pentamethylene is inflammable and explosive, and spraying process use is than relatively hazardous, and, need higher to equipment requirement
Transformed.
In summary, it is badly in need of a kind of environment-friendly foaming with spary coating type and combines material, can solves foregoing invention and be imitated in the presence of production
Rate is low, wastes and not environmentally problem.
The content of the invention
In view of the above-mentioned problems, it can be used for spray quick pushing manipulation prefabricated thermal insulation pipeline it is an object of the invention to provide a kind of environment-friendly type
Polyurethane hard bubble composite material and preparation method thereof.
To achieve the above object, the present invention takes following technical scheme：
A kind of polyurethane hard bubble composite material, preparing raw material include component A and B component, and B component is mixture, total with B component
Mass Calculation, B component include the component of following percentage：
83~90wt% of polyhydric alcohol conjugate；
1.5~4.5wt% of foaming agent；
4~8.5wt% of catalyst；
0.5~4wt% of foam stabiliser；
0.5~5wt% of thinner.
The component A is isocyanates, selected from diisocyanate, poly methylene poly phenyl poly isocyanate, three isocyanic acids
One or more in ester, tetraisocyanate, preferably poly methylene poly phenyl poly isocyanate, more preferably degree of functionality be 2.6~
2.7 poly methylene poly phenyl poly isocyanate PM200.
In polyurethane hard bubble composite material of the present invention, the mass ratio of the component A and B component is 1~1.5：1.
In polyurethane hard bubble composite material of the present invention, the thinner is in alkanone type organic, silicone oligomer
One or more, preferably alkanone type organic, more preferably 1-METHYLPYRROLIDONE.At 20 DEG C, 1-METHYLPYRROLIDONE proportion is
1.029~1.033, with the Mass Calculation of monomethyl amine, unhindered amina≤0.003wt%.
After the present invention adds 1-METHYLPYRROLIDONE, viscosity is declined quickly；And steeped under obtained foam finished product high temperature
The effusion of carbon dioxide is eased in hole, and finished size stability is preferable, and foam toughness is preferable.
Sucrose polyethers polyalcohol, the sorbierite of 20~40 mass parts that the polyhydric alcohol conjugate includes 15~35 mass parts gather
The propylene glycol polyether polyol of ethoxylated polyhydric alcohol, the ethylenediamine PPG of 18~33 mass parts and 0~25 mass parts.
At 25 DEG C, the Sucrose polyethers polyalcohol hydroxyl value is 350~420mgKOH/g, viscosity is 9000~
14000mPa·s；Sorbeth polyalcohol hydroxyl value is 400~500mgKOH/g, and viscosity is 20000~34000mPas；Second
Diamine polyether polyalcohol hydroxyl value is 410~520mgKOH/g, and viscosity is 3000~5000mPas；Propylene glycol polyether polyol hydroxyl
It is 100~200mPas to be worth for 80~120mgKOH/g, viscosity.
Foam stabiliser of the present invention is selected from siloxane type surfactants and/or non-silicone-based surfactant, institute
Stating siloxane type surfactants includes non-polar silicone oleophylic main chain and polarity polyethers hydrophilic branches, preferably B84806,
One or more in AK8805, east high H3636, DC193, B8423, B8404, AK8812；The non-silicone-based surface-active
Agent is preferably LK221；The foam stabiliser is more preferably B84806, LK221.At 25 DEG C, the non-silicone-based surface is lived
Property agent LK221 viscosity is 2800mPas, proportion 1.01, hydroxyl value 40mgKOH/g.
Catalyst of the present invention is selected from amines catalyst and/or organic metal salt catalyst, described amines catalysis
Agent is selected from five methyl diethylentriamine, N, N- dimethyl cyclohexyl amines, triethylene diamine, triethylamine, 1,4- lupetazins, N,
One or more in N- dimethyl benzylamines, double dimethylamino ethyl ethers, described organic metal salt catalyst are selected from different pungent
One in sour potassium, formic acid quaternary ammonium salt, potassium acetate, dibutyl tin laurate, stannous octoate, dibutyltin diacetate, potassium oleate
Kind is a variety of.The preferred five methyl diethylentriamine of catalyst, N, N- dimethyl benzylamines, triethylene diamine.
In the present invention, the foaming agent is water.
The preparation method of polyurethane hard bubble composite material of the present invention is that each PPG in B component is added into stirred tank, side
Side temperature control is stirred to 75-80 DEG C of addition foam stabiliser, catalyst, thinner, foaming agent, 80 turns/min of speed of agitator, stirring
40-50min detections moisture, viscosity, time, density index are qualified.
Polyurethane hard bubble composite material of the present invention can be used for spraying quick pushing manipulation production polyurethane thermal pipe.
Using the polyurethane hard bubble composite material of the present invention as raw material, the method for spray quick pushing manipulation continuous production polyurethane thermal pipe is used
It is according to mass ratio 1~1.5 by obtained B component and component A isocyanates:1 is sprayed on rotation simultaneously by high-pressure spraying machine respectively
Automatic curing molding on the steel pipe at the uniform velocity to advance.
The polyurethane thermal pipe foam cell average-size as made from polyurethane hard bubble composite material of the present invention≤
0.5mm；Density >=60kg/m3；Water absorption rate≤8%；Rate of closed hole >=90%；Thermal conductivity factor≤0.033W/ (mK)；Radial compression is strong
Degree >=0.3Mpa；Outer protection tube surface temperature≤50 DEG C when heat-insulation layer outer jacket is run.
The positive effect of the present invention is to have used water as foaming agent, more environmentally-friendly, by adding N- crassitudes
Ketone so that combination material viscosity declines quickly, and effectively inhibits the effusion of carbon dioxide in polyurethane thermal pipe abscess under high temperature,
So that foam stability is preferable, toughness is preferable.
Embodiment
Presently preferred embodiments of the present invention is described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that apparent clearly defined so as to be made to protection scope of the present invention.
The raw material used in embodiment：
Sucrose polyethers polyalcohol：(25 DEG C viscous by R2839 (25 DEG C of viscosity 35000mPa's, hydroxyl value 410mgKOH/g), R2839A
Spend 11000mPa's, hydroxyl value 380mgKOH/g) Wanhua Chemical (Ningbo) Rongwei Polyurethane Co., Ltd.,
Sorbeth polyalcohol：R6245 (25 DEG C of viscosity 26000mPa's, hydroxyl value 450mgKOH/g), (25 DEG C of R2490
Viscosity 11000mPa's, hydroxyl value 500mgKOH/g) Wanhua Chemical (Ningbo) Rongwei Polyurethane Co., Ltd.,
Ethylenediamine PPG：The China of R2405 (25 DEG C of viscosity 4000mPa's, hydroxyl value 460mgKOH/g) ten thousand chemistry is (peaceful
Ripple) Rong Wei polyurethane Co., Ltd,
Propylene glycol polyether polyol：(25 DEG C viscous by C2010 (25 DEG C of viscosity 150mPa's, hydroxyl value 112mgKOH/g), C2007
Spend 100mPa's, hydroxyl value 170mgKOH/g), the China of C2010B (25 DEG C of viscosity 160mPa's, hydroxyl value 115mgKOH/g) ten thousand chemistry
(Ningbo) Rong Wei polyurethane Co., Ltd,
LK221 Ying Chuan Specialty Chemicals (Shanghai) Co., Ltd.,
B84806 Evonik Degussa (China) Co., Ltd.
1-METHYLPYRROLIDONE Maiqi Chemical Co., Ltd.,
TEP Jiangsu Wei Keterui Chemical Co., Ltd.s
Five methyl diethylentriamine Ying Chuan Specialty Chemicals (Shanghai) Co., Ltd.,
Triethylene diamine Ying Chuan Specialty Chemicals (Shanghai) Co., Ltd.,
Dimethyl Bian Anpinhua chemical industry (Shanghai) Co., Ltd..
Embodiment 1
(1) prepared by B component：
Calculated with B component gross mass, each ingredient percent such as following table in B component
The preparation process of B component is：PPG R2839, R6245, R2405, C2010 in B component are added into stirring
Kettle, while stirring temperature control to 80 DEG C add 1-METHYLPYRROLIDONEs, B84806, five methyl diethylentriamine, dimethyl Bian amine,
Water, 80 turns/min of speed of agitator stir that moisture, viscosity, time, density index are detected after 40min is qualified.
(2) preparation of polyurethane rigid foam composition：
By poly methylene poly phenyl poly isocyanate PM200 and B component according to mass ratio 1:1 passes through high-pressure spraying machine respectively
It is sprayed on automatic curing molding on the steel pipe for rotating and at the uniform velocity advancing.
Go out polyurethane foam performance such as following table according to obtained by with upper type：
Embodiment 2
Configure polyurethane rigid foam composition, and be placed on it is stand-by in material spraying machine, its component and match it is as follows：
Calculated with B component gross mass, each ingredient percent such as following table in B component：
The preparation process of B component is：PPG R8239A, R2490, R2405, C2007 in B component are added into stirring
Kettle, while stirring temperature control to 75 DEG C add 1-METHYLPYRROLIDONEs, LK221, five methyl diethylentriamine, triethylene diamine,
Dimethyl Bian amine, water, 80 turns/min of speed of agitator stir that moisture, viscosity, time, density index are detected after 45min is qualified.
(2) preparation of polyurethane rigid foam composition：
By poly methylene poly phenyl poly isocyanate PM200 and B component according to mass ratio 1.5:1 passes through high pressure painting respectively
Machine is sprayed on automatic curing molding on the steel pipe for rotating and at the uniform velocity advancing.
Go out polyurethane foam performance such as following table according to obtained by with upper type：
Embodiment 3
Configure polyurethane rigid foam composition, and be placed on it is stand-by in material spraying machine, its component and match it is as follows：
Calculated with B component gross mass, each ingredient percent such as following table in B component
The preparation process of B component is：PPG R2839, R6245, R2405, C2010 in B component are added into stirring
Kettle, while stirring temperature control to 75 DEG C add 1-METHYLPYRROLIDONEs, LK221, five methyl diethylentriamine, dimethyl Bian amine,
Water, 80 turns/min of speed of agitator stir that moisture, viscosity, time, density index are detected after 50min is qualified.
(2) preparation of polyurethane rigid foam composition：
By component A and B component according to mass ratio 1.3:1 is sprayed on the steel for rotating and at the uniform velocity advancing by high-pressure spraying machine respectively
Automatic curing molding on pipe.
Go out polyurethane foam performance such as following table according to obtained by with upper type：
Comparative example 1
Configure polyurethane rigid foam composition, and be placed on it is stand-by in material spraying machine, its component and match it is as follows：
Calculated with B component gross mass, each ingredient percent such as following table in B component
The preparation process of B component is：PPG R2839, R6245, R2405, C2010 in B component are added into stirring
Kettle, while stirring temperature control to 75 DEG C add TEP, LK221, five methyl diethylentriamine, dimethyl Bian amine, water, speed of agitator
80 turns/min, stir that moisture, viscosity, time, density index are detected after 50min is qualified.
(2) preparation of polyurethane rigid foam composition：
By component A and B component according to mass ratio 1.3:1 is sprayed on the steel for rotating and at the uniform velocity advancing by high-pressure spraying machine respectively
Automatic curing molding on pipe.
Go out polyurethane foam performance such as following table according to obtained by with upper type：
Claims (10)
1. a kind of pipe insulation polyurethane hard bubble composite material, preparing raw material includes component A and B component, wherein, component A is isocyanide
Acid esters, is calculated with B component gross mass, and B component includes the component of following percentage：
2. combination material according to claim 1, it is characterised in that：It is more that the component A is selected from diisocyanate, polymethylene
One or more in polyphenyl polyisocyanate, triisocyanate, tetraisocyanate, preferably polymethylene polyphenyl polyisocyanic acid
Ester, more preferably degree of functionality are 2.6~2.7 poly methylene poly phenyl poly isocyanate PM200.
3. combination material according to claim 1 or 2, it is characterised in that：The mass ratio of the component A and B component be 1~
1.5：1.
4. according to the combination material described in claim any one of 1-3, it is characterised in that：It is organic that the thinner is selected from alkanone class
One or more in thing, silicone oligomer, preferably alkanone type organic, more preferably 1-METHYLPYRROLIDONE.
5. according to the combination material described in claim any one of 1-4, it is characterised in that：The polyhydric alcohol conjugate includes 15~35 matter
Measure the Sucrose polyethers polyalcohol of part, the sorbeth polyalcohol of 20~40 mass parts, the ethylenediamine polyethers of 18~33 mass parts
The propylene glycol polyether polyol of polyalcohol and 0~25 mass parts.
6. according to the combination material described in claim any one of 1-5, it is characterised in that：The foam stabiliser is selected from type siloxane
Surfactant and/or non-silicone-based surfactant, the preferred B84806, AK8805 of the siloxane type surfactants, east
One or more in high H3636, DC193, B8423, B8404, AK8812；The non-silicone-based surfactant is preferably
LK221；The foam stabiliser is more preferably B84806 and/or LK221.
7. according to the combination material described in claim any one of 1-6, it is characterised in that：The catalyst is selected from amines catalyst
And/or organic metal salt catalyst, described amines catalyst select five methyl diethylentriamine, N, N- dimethyleyelohexanes
Amine, triethylene diamine, triethylamine, 1,4- lupetazins, N, N- dimethyl benzylamines, one kind in double dimethylamino ethyl ethers or
It is a variety of, preferably five methyl diethylentriamine, N, N- dimethyl benzylamines, triethylene diamine.
8. according to the combination material described in claim any one of 1-7, it is characterised in that：The foaming agent is water.
9. a kind of method for preparing any one of the claim 1-8 combination material, including：
(1) polyhydric alcohol conjugate, foaming agent, catalyst, foam stabiliser, thinner are well mixed, B component is made；
(2) B component and component A made from step (1) are well mixed, curing molding.
10. combination material or the combination of method preparation according to claim 9 according to any one of claim 1-8
Material, it is characterised in that：Foam cell average-size≤0.5mm made from the combination material；Density >=60kg/m3；Water absorption rate≤
8%；Rate of closed hole >=90%；Thermal conductivity factor≤0.033W/ (mK)；Radial compression intensity >=0.3Mpa；Outer protection tube surface during operation
Temperature≤50 DEG C.
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| CN201711349260.XA CN107868218B (en) | 2017-12-15 | 2017-12-15 | Polyurethane rigid foam composite material for pipeline heat insulation and preparation method thereof |
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| CN201711349260.XA CN107868218B (en) | 2017-12-15 | 2017-12-15 | Polyurethane rigid foam composite material for pipeline heat insulation and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280364A (en) * | 2018-08-08 | 2019-01-29 | 日丰企业（佛山）有限公司 | The prefabricated direct-buried thermal insulation pipe road and complex heat-preservation composition of superelevation axial direction shear strength |
| CN111234677A (en) * | 2020-01-17 | 2020-06-05 | 烟台市顺达聚氨酯有限责任公司 | Environment-friendly rigid polyurethane spraying material for polyethylene-wound prefabricated direct-buried thermal insulation pipe and preparation method thereof |
| CN115141342A (en) * | 2022-05-24 | 2022-10-04 | 佳化化学科技发展（上海）有限公司 | Polyether composition for polyurethane rigid foam and preparation method and application thereof |
| CN116444751A (en) * | 2022-01-06 | 2023-07-18 | 万华化学（宁波）容威聚氨酯有限公司 | All-water spraying winding polyol composite material, polyurethane rigid foam plastic and preparation method of polyurethane rigid foam plastic heat-insulation pipeline |
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| CN106146798A (en) * | 2016-08-01 | 2016-11-23 | 山东诺威新材料有限公司 | Pipeline and kettle insulation ageing-resistant spary coating type combined polyether and its preparation method and application |
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| CN103159908A (en) * | 2013-04-03 | 2013-06-19 | 天津市管道工程集团有限公司 | Polyurethane for coating and winding prefabricated directly buried insulating pipe |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280364A (en) * | 2018-08-08 | 2019-01-29 | 日丰企业（佛山）有限公司 | The prefabricated direct-buried thermal insulation pipe road and complex heat-preservation composition of superelevation axial direction shear strength |
| CN109280364B (en) * | 2018-08-08 | 2021-04-02 | 日丰企业（佛山）有限公司 | Prefabricated direct-buried heat insulation pipeline with ultrahigh axial shear strength and composite heat insulation composition |
| CN111234677A (en) * | 2020-01-17 | 2020-06-05 | 烟台市顺达聚氨酯有限责任公司 | Environment-friendly rigid polyurethane spraying material for polyethylene-wound prefabricated direct-buried thermal insulation pipe and preparation method thereof |
| CN111234677B (en) * | 2020-01-17 | 2021-08-03 | 烟台市顺达聚氨酯有限责任公司 | Environment-friendly rigid polyurethane spraying material for polyethylene-wound prefabricated direct-buried thermal insulation pipe and preparation method thereof |
| CN116444751A (en) * | 2022-01-06 | 2023-07-18 | 万华化学（宁波）容威聚氨酯有限公司 | All-water spraying winding polyol composite material, polyurethane rigid foam plastic and preparation method of polyurethane rigid foam plastic heat-insulation pipeline |
| CN115141342A (en) * | 2022-05-24 | 2022-10-04 | 佳化化学科技发展（上海）有限公司 | Polyether composition for polyurethane rigid foam and preparation method and application thereof |
| CN115141342B (en) * | 2022-05-24 | 2023-08-04 | 佳化化学科技发展（上海）有限公司 | Polyether composition for polyurethane rigid foam, and preparation method and application thereof |
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