CN112521575B - Combined material for filling elevator guide rail and preparation method and application thereof - Google Patents
Combined material for filling elevator guide rail and preparation method and application thereof Download PDFInfo
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- 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
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- C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5021—Polyethers having heteroatoms other than oxygen having nitrogen
- C08G18/5054—Polyethers having heteroatoms other than oxygen having nitrogen containing heterocyclic rings having at least one nitrogen atom in the ring
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- 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
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- 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
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- C08J2205/00—Foams characterised by their properties
- C08J2205/10—Rigid foams
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- 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
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
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- C08J2375/08—Polyurethanes from polyethers
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Abstract
The invention relates to a combined material for filling an elevator guide rail, and a preparation method and application thereof, and mainly solves the problems that polyurethane rigid foam prepared from a common elevator guide rail filling combined material in the prior art is high in noise in use and easy to deform after long-time use, the combined material for filling the elevator guide rail comprises a component A and a component B, wherein the component A and the component B are 1: 1-1.5 in percentage by weight; wherein the component A comprises polyether polyol I, melamine polyol, polyether polyol II, polyester polyol, a foam stabilizer, a catalyst, a physical foaming agent, water and an auxiliary agent, wherein the auxiliary agent is at least one of a cell opening agent, an antioxidant or a dispersing agent; the component B is multi-methyl polyphenyl polyisocyanate and the technical scheme of the preparation method thereof, well solves the problems and can be used in the industrial application of the elevator guide rail.
Description
Technical Field
The invention belongs to the field of polyurethane, and particularly relates to a combined material for filling an elevator guide rail, and a preparation method and application thereof.
Background
The buildings in the current society are developed towards high floors, elevators are used more and more, and the requirements on the safety and the comfort of the elevators are higher and higher. Elevator guide rails are a very important part of elevators, concerning safety and comfort of use of the elevator. When the elevator runs, the common elevator guide rail can generate larger noise, so that the use comfort of the elevator is influenced; meanwhile, the elevator guide rail is subjected to the pressure of the elevator car for a long time, so that deformation is easily generated, and the safety of the elevator is affected. When the common elevator guide rail is damaged, the whole guide rail needs to be replaced, a large amount of resources are wasted, and the production cost is increased.
The polyurethane rigid foam plastic is called polyurethane rigid foam for short, and the dosage of the polyurethane rigid foam plastic in a polyurethane product is only second to that of polyurethane flexible foam; the polyurethane hard foam is mostly of a closed-cell structure, has the excellent characteristics of good heat insulation effect, light weight, high specific strength, convenient construction and the like, has the characteristics of sound insulation, shock resistance, electric insulation, heat resistance, cold resistance, solvent resistance and the like, is widely used for heat insulation materials of refrigerator bodies of refrigerators and freezer cases, cold storages, refrigerated trucks and the like, and heat insulation materials of buildings, storage tanks and pipelines, and is used for non-heat insulation occasions in a small amount, such as imitation wood, packaging materials and the like. In general, the lower density rigid polyurethane foam is mainly used as a thermal insulation material, and the higher density rigid polyurethane foam is used as a structural material (e.g., imitation wood). At present, the exploration of the application of the polyurethane rigid foam in the elevator guide rail has appeared, and the polyurethane rigid foam is gradually pursued to be a new research direction by polyurethane rigid foam researchers.
Chinese patent CN1900132A discloses a preparation method of high-strength rigid polyurethane foam, and the apparent density of the prepared rigid polyurethane foam is 140kg/m3The compression strength is more than or equal to 1.2Mpa, the size change rate is less than or equal to 0.7%, although the foam structure is mainly of a closed cell structure compared with the common rigid polyurethane foam, when the foam structure is applied to the filling of the elevator guide rail, the sound absorption and noise reduction effects are poor, the compression strength and the size change rate need to be further improved, otherwise, the foam is easy to shrink and deform after being used for a long time, and the requirement of the elevator guide rail filling material on the safety cannot be met.
The main test standard of the sound absorption performance of the material in the prior art is part 1 of the test of sound absorption coefficient and sound impedance in GB/T18696.1-2004 acoustic impedance tubes: standing wave ratio method, in which the testing range of the adopted equipment is 100 Hz-6300 Hz, sample preparation requires that a sample is cut into circular samples with the diameters of 9.6cm and 3cm respectively, the circular sample with the diameter of 9.6cm is used for testing the low-frequency sound absorption coefficient, and the circular sample with the diameter of 3cm is used for testing the high-frequency sound absorption coefficient; the average sound absorption coefficient is calculated according to the sound absorption coefficients measured under the frequencies of 125Hz, 250Hz, 500Hz, 1000Hz, 2000Hz and 4000Hz, and the higher the average sound absorption coefficient is, the better the sound absorption performance of the material is. Materials with a sound absorption coefficient greater than 0.2 are generally considered sound absorbers, and materials with a sound absorption coefficient greater than 0.5 are considered good sound absorbers.
Disclosure of Invention
One of the technical problems to be solved by the invention is that the rigid polyurethane foam prepared by the common elevator guide rail filling composite material in the prior art has large noise in use and is easy to deform after long-time use, and the composite material for filling the elevator guide rail has the advantages of low noise and difficult deformation after being used for filling the elevator guide rail.
The second technical problem to be solved by the present invention is to provide a method for preparing the composition material for filling elevator guide rails, which corresponds to the first technical problem.
The invention also provides the use of the composition for filling the guide rail of the elevator, which corresponds to one of the technical problems.
In order to solve one of the above technical problems, the technical solution provided by the present invention is as follows: the combined material for filling the elevator guide rail comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1:1 to 1.5; wherein, the component A comprises the following components in percentage by weight: polyether polyol I: 15-20%, melamine polyol: 20-30%, polyether polyol II: 10-20%, polyester polyol: 15-35%, foam stabilizer: 0.1-0.5%, catalyst: 0.1-0.45%, physical foaming agent: 5-8%, water: 0.2-0.45%, and auxiliary agent: 2-6%; wherein in component A: the polyether polyol I has a functionality of 4-6 and a number average molecular weight of 300-1000; the melamine polyol has a functionality of 3-3.5, a hydroxyl value of 230-260 mgKOH/g and a viscosity of 8000-10000 mpa & s; the polyether polyol II is polyether polyol with the functionality of 2-3 and the number average molecular weight of 800-1200; the polyester polyol has a functionality of 2-3 and a hydroxyl value of 240-400 mgKOH/g; the foam stabilizer is selected from at least one of non-hydrolyzed silicon-carbon surfactant or polysiloxane surfactant; the catalyst is at least one of amine catalyst or metal catalyst; the physical foaming agent is fluorinated alkane; the auxiliary agent is at least one of a pore forming agent, an antioxidant or a dispersing agent; the component B is polymethine polyphenyl polyisocyanate.
In the above technical solution, preferably, the catalyst is selected from at least two of potassium acetate, potassium isooctanoate, triethylene diamine, dibutyl tin dilaurate, tris (dimethylaminopropyl) hexahydrotriazine, 3-dimethylaminopropylamine, pentamethyldiethylenetriamine, pentamethyldipropylenetriamine, trimethylaminoethylethanolamine, dimethylaminoethoxyethanol, or 2,4, 6-tris (dimethylaminoethyl) phenol.
In the above technical solution, preferably, the physical blowing agent is at least one selected from monofluorodichloroethane, 1,1,1,3, 3-pentafluorobutane, 1,1,1,3, 3-pentafluoropropane, 1,1,1, 2-tetrafluoroethane, difluoroethane, or heptafluoropropane; the cell opener is selected from the group consisting of GrandTechTMAt least one of K340, ORTEGOL 501, or CHK-350D; the antioxidant is at least one of antioxidant 245, antioxidant 1010 or antioxidant 1035; the dispersant is selected from at least one of Gen0451 or Ger0851 of OMG Borchers company.
To solve the second technical problem, the present invention provides the following technical solutions: a preparation method of a combined material for filling an elevator guide rail comprises the following steps:
(1) preparing raw materials according to the following components in percentage by weight:
the component A comprises the following components in percentage by weight: polyether polyol I: 15-20%, melamine polyol: 20-30%, polyether polyol II: 10-20%, polyester polyol: 15-35%, foam stabilizer: 0.1-0.5%, catalyst: 0.1-0.45%, physical foaming agent: 5-8%, water: 0.2-0.45%, and auxiliary agent: 2-6%; wherein in component A: the polyether polyol I has a functionality of 4-6 and a number average molecular weight of 300-1000; the melamine polyol has a functionality of 3 to 3.5, a hydroxyl value of 230 to 260mgKOH/g, and a viscosity of 8000 to 10000mpa · s; the polyether polyol II is polyether polyol with the functionality of 2-3 and the number average molecular weight of 800-1200; the polyester polyol has a functionality of 2-3 and a hydroxyl value of 240-400 mgKOH/g; the foam stabilizer is selected from at least one of non-hydrolyzed silicon-carbon surfactant or polysiloxane surfactant; the catalyst is at least one of amine catalyst or metal catalyst; the physical foaming agent is fluorinated alkane; the auxiliary agent is at least one of a pore forming agent, an antioxidant or a dispersing agent; the component B is polymethine polyphenyl polyisocyanate; the weight ratio of the component A to the component B is 1:1 to 1.5;
(2) preparation of component A:
sequentially adding the weighed polyether polyol I, melamine polyol, polyether polyol II, polyester polyol, a foam stabilizer, a catalyst, a physical foaming agent, water and an auxiliary agent into a reaction kettle according to the components and the weight percentage in the step (1), stirring for 1-1.5 hours at normal temperature, and fully mixing;
(3) and uniformly mixing the component A and the component B through a guide rail casting machine, injecting and foaming, and performing foam molding and curing to obtain the product.
In the above technical solution, preferably, the catalyst is selected from at least two of potassium acetate, potassium isooctanoate, triethylene diamine, dibutyl tin dilaurate, tris (dimethylaminopropyl) hexahydrotriazine, 3-dimethylaminopropylamine, pentamethyldiethylenetriamine, pentamethyldipropylenetriamine, trimethylaminoethylethanolamine, dimethylaminoethoxyethanol, or 2,4, 6-tris (dimethylaminoethyl) phenol.
In the above technical solution, preferably, the physical blowing agent is at least one selected from the group consisting of monofluorodichloroethane, 1,1,1,3, 3-pentafluorobutane, 1,1,1,3, 3-pentafluoropropane, 1,1,1, 2-tetrafluoroethane, difluoroethane and heptafluoropropane; the cell opener is selected from the group consisting of GrandTechTMAt least one of K340, ORTEGOL 501, or CHK-350D; the antioxidant is at least one of antioxidant 245, antioxidant 1010 or antioxidant 1035; the dispersant is selected from at least one of Gen0451 or Ger0851 of OMG Borchers company.
In the above technical solution, preferably, the operating conditions of the guide rail casting machine are as follows: debugging equipment, and then achieving the pressure of 500-1500 psi and the temperature of 20-25 ℃ to meet the pouring requirement; the moving speed of the guide rail through the conveyor belt during pouring is required to be uniform, the environmental temperature of the pouring working condition is 10-35 ℃, and the relative humidity is less than 85%.
To solve the third technical problem, the invention provides the following technical scheme: the combined material for filling the elevator guide rail is used in polyurethane foaming for filling the elevator guide rail.
In the invention, based on the amine polyol EDS-5083M, proper additives such as polyether polyol, polyester polyol, catalyst, foam stabilizer, cell opener and the like are screened for formulation test; wherein, melamine polyol EDS-5083M is flame-retardant polyether polyol prepared by using melamine as an initiator, the structure of the product is vividly called sea-island type molecular structure, and the product comprises two parts: firstly, peripheral flexible molecular fragments capable of endowing the material with excellent toughness; secondly, hard core molecule fragments which can endow the material with high strength and high modulus; the molecular structure can play a role in enhancing the compressive strength of the polyurethane rigid foam and maintaining the dimensional stability of the foam in the rigid polyurethane foam (for example, the compressive strength of the polyurethane rigid foam is more than or equal to 2100kPa and the volume change rate is less than or equal to 0.3 percent in examples 1-10). In addition, by applying the formula of the composite material, the open cell ratio of the rigid polyurethane foam prepared in the embodiments 1-10 is more than 85%, and the open cell foam structure has a certain sound absorption effect, for example, the average sound absorption coefficient of the rigid polyurethane foam is more than 0.5, and the rigid polyurethane foam is a good sound absorption material; so that it functions to reduce noise after the elevator guide rails have been filled. Therefore, the polyurethane rigid foam filled with the combined material has the advantages of high compressive strength, good dimensional stability, high aperture ratio and large average sound absorption coefficient after being used for the elevator guide rail, thereby having the advantages of difficult deformation and low noise and obtaining better technical effect.
The present invention will be further illustrated by the following examples, but is not limited to these examples.
Detailed Description
TABLE 1 raw material List
[ example 1 ]
1) Preparation of component A: 100kg of
Polyether polyol I was weighed: NJ-6305C, 17 kg; polyether polyol II: CHE-210, 14.3 kg; melamine polyol: EDS-5083M, 28 kg; polyester polyol: PS-3152, 30 kg; non-hydrolyzed silicon carbon type surfactants: b-8545, 0.5 kg; catalyst: a mixed catalyst composed of 0.2kg of N, N-dimethylcyclohexylamine and 0.05kg of dibutyltin dilaurate; physical foaming agent: HCFC-141b, 5 kg; water: 0.45 kg; a pore forming agent: GrandTechTMK340, 3 kg; antioxidant: IRGANOX 245, 1 kg; dispersing agent: gen0451, 0.5 kg.
2) Sequentially adding weighed polyether polyol I, melamine polyol, polyether polyol II, polyester polyol, a foam stabilizer, a catalyst, a physical foaming agent, water, a pore-opening agent, an antioxidant and a dispersing agent into a reaction kettle, stirring for 1.5 hours at normal temperature, and fully mixing;
3) weighing a component B: 110 kg; the component B is PM-200;
4) mixing the component A and the component B according to the weight ratio of 1: 1.1, uniformly mixing by a guide rail casting machine, casting and foaming, and quickly molding and curing the foam to prepare the polyurethane rigid foam material, wherein the guide rail casting machine has the operating conditions as follows: after the equipment is debugged, the pressure is 800psi, the temperature is 23 ℃, and the pouring requirement is met; the moving speed of the guide rail through the conveyor belt during pouring is required to be uniform, the environmental temperature of the pouring working condition is 25 ℃, the relative humidity is less than 85%, and the performance index data of the prepared polyurethane rigid foam material is shown in Table 3.
[ examples 2 to 10 ]
Examples 2 to 10 were carried out according to the steps of example 1, except that the reaction raw materials, the raw material ratios, and the stirring time were different, as shown in table 2; the performance index data of the prepared polyurethane rigid foam material are shown in tables 3 and 4.
TABLE 2 weight (kg) of raw materials of each component in examples 1 to 10
[ COMPARATIVE EXAMPLE 1 ]
The foam property index data obtained by preparing a polyurethane rigid foam having a high hardness by referring to the method described in example 3 of the CN1900132A patent are shown in table 5.
TABLE 3 data for testing the properties of the rigid polyurethane foams of examples 1 to 5
TABLE 4 data of performance test of the rigid polyurethane foams of examples 6 to 10
TABLE 5 data of measurement of properties of the rigid polyurethane foam of comparative example 1
As can be seen from the performance data of the rigid polyurethane foams in tables 3, 4 and 5, the rigid polyurethane foams prepared from the compositions used in examples 1 to 10 of the present invention have a density of 100kg/m3In this case, the compressive strength was 2100kPa or more, the hardness was higher than that of comparative example 1, but the density was low, and the foam material could be savedMaterial consumption; the volume change rate is below 0.3%, the dimensional stability is good, and the deformation is difficult; the open cell ratio is more than 85%, the obtained rigid polyurethane foam has a certain open cell structure, and can play a better role in sound absorption and noise reduction compared with the closed cell structure of common high-strength rigid foam, for example, in the embodiment 1-10, the average sound absorption coefficient of the rigid polyurethane foam is more than 0.5, and the rigid polyurethane foam belongs to a good sound absorption material; therefore, the rigid polyurethane foam prepared from the composite material in the embodiments 1-10 has the advantages of high compressive strength, good dimensional stability, high aperture ratio and high average sound absorption coefficient, so that the beneficial effects of difficult deformation and low noise are obtained, and the rigid polyurethane foam can be used in industrial application of the elevator guide rail filling material.
Claims (5)
1. The combined material for filling the elevator guide rail consists of a component A and a component B, wherein the weight ratio of the component A to the component B is 1:1 to 1.5; wherein, the component A comprises the following components in percentage by weight: polyether polyol I: 15-20%, melamine polyol: 20-30%, polyether polyol II: 10-20%, polyester polyol: 15-35%, foam stabilizer: 0.1-0.5%, catalyst: 0.1-0.45%, physical foaming agent: 5-8%, water: 0.25-0.45%, pore-forming agent: 2-3.5%, antioxidant: 0.5-1.5%, dispersant: 0.4-0.5%; wherein in component A: the polyether polyol I has a functionality of 4-6 and a number average molecular weight of 300-1000; the melamine polyol has a functionality of 3 to 3.5, a hydroxyl value of 230 to 260mgKOH/g, and a viscosity of 8000 to 10000mpa · s; the polyether polyol II is polyether polyol with the functionality of 2-3 and the number average molecular weight of 800-1200; the polyester polyol has a functionality of 2-3 and a hydroxyl value of 240-400 mgKOH/g; the foam stabilizer is selected from at least one of non-hydrolyzed silicon-carbon surfactant or polysiloxane surfactant; the catalyst is at least one of amine catalyst or metal catalyst; the physical foaming agent is fluorinated alkane; the cell opener is selected from the group consisting of GrandTechTMAt least one of K340 or CHK-350D; the component B is polymethine polyphenyl polyisocyanate.
2. The use of the elevator guide rail filling composition of claim 1, wherein the catalyst is selected from at least two of potassium acetate, potassium isooctanoate, triethylenediamine, dibutyltin dilaurate, tris (dimethylaminopropyl) hexahydrotriazine, 3-dimethylaminopropylamine, pentamethyldiethylenetriamine, pentamethyldipropylenetriamine, trimethylaminoethylethanolamine, dimethylaminoethoxyethanol, or 2,4, 6-tris (dimethylaminoethyl) phenol.
3. The use of the composition for filling an elevator guide rail according to claim 1, wherein the physical blowing agent is at least one selected from the group consisting of monofluorodichloroethane, 1,1,1,3, 3-pentafluorobutane, 1,1,1,3, 3-pentafluoropropane, 1,1,1, 2-tetrafluoroethane, difluoroethane and heptafluoropropane; the antioxidant is at least one of antioxidant 245, antioxidant 1010 or antioxidant 1035; the dispersant is selected from at least one of Gen0451 or Ger0851 of OMG Borchers company.
4. The use of the composition for filling an elevator guide rail according to claim 1, wherein the preparation method of the composition for filling an elevator guide rail comprises the following steps:
(1) preparing raw materials according to the following components in percentage by weight:
the component A comprises the following components in percentage by weight: polyether polyol I: 15-20%, melamine polyol: 20-30%, polyether polyol II: 10-20%, polyester polyol: 15-35%, foam stabilizer: 0.1-0.5%, catalyst: 0.1-0.45%, physical foaming agent: 5-8%, water: 0.25-0.45%, pore-forming agent: 2-3.5%, antioxidant: 0.5-1.5%, dispersant: 0.4-0.5%; wherein in component A: the polyether polyol I has a functionality of 4-6 and a number average molecular weight of 300-1000; the melamine polyol has a functionality of 3 to 3.5, a hydroxyl value of 230 to 260mgKOH/g, and a viscosity of 8000 to 10000mpa · s; polyether polyol II is polyether polyol with 2-3 functionality and number average molecular weight of 800-1200An alcohol; the polyester polyol has a functionality of 2-3 and a hydroxyl value of 240-400 mgKOH/g; the foam stabilizer is selected from at least one of non-hydrolyzed silicon-carbon surfactant or polysiloxane surfactant; the catalyst is at least one of amine catalyst or metal catalyst; the physical foaming agent is fluorinated alkane; the cell opener is selected from the group consisting of GrandTechTMAt least one of K340 or CHK-350D; the component B is polymethine polyphenyl polyisocyanate; the weight ratio of the component A to the component B is 1:1 to 1.5;
(2) preparation of component A:
sequentially adding the weighed polyether polyol I, melamine polyol, polyether polyol II, polyester polyol, a foam stabilizer, a catalyst, a physical foaming agent, water and an auxiliary agent into a reaction kettle according to the components and the weight percentage in the step (1), stirring for 1-1.5 hours at normal temperature, and fully mixing;
(3) and uniformly mixing the component A and the component B through a guide rail casting machine, injecting and foaming, and performing foam molding and curing to obtain the product.
5. Use of an elevator guide rail filling composition according to claim 4 in elevator guide rails, characterized in that the operating conditions of the guide rail casting machine are: after debugging equipment, the pressure is 500-1500 psi, the temperature is 20-25 ℃, and the pouring requirement is met; the moving speed of the guide rail through the conveyor belt during casting must be uniform, the environmental temperature of the casting working condition is 10-35 ℃, and the relative humidity is less than 85%.
Priority Applications (1)
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| FI20100129A (en) * | 2010-03-24 | 2011-09-25 | Kone Corp | Guide rail for elevator and elevator |
| CN102532865B (en) * | 2011-12-22 | 2013-09-18 | 山东东大一诺威新材料有限公司 | Composite polyether for environmentally-friendly open pore type pipeline and preparation method thereof |
| CN103012737B (en) * | 2013-01-10 | 2014-11-05 | 江苏斯泰达新能源科技发展有限公司 | 100% water-base foamed polyurethane foam and preparation method thereof |
| CN104356335B (en) * | 2014-11-14 | 2017-03-01 | 南京红宝丽聚氨酯有限公司 | The open-cell polyurethane rigid foam prepared by hard polyurethane foam degradation solution |
| CN104403075B (en) * | 2014-11-27 | 2017-11-24 | 山东一诺威新材料有限公司 | For electrothermal floor heating polyurethane thermal insulation board combined polyether and its application process |
| CN105348470B (en) * | 2015-11-25 | 2018-05-01 | 山东一诺威新材料有限公司 | Low-density high fire-retardance continuous slab foamed plastics and preparation method thereof |
| CN105968302B (en) * | 2016-05-27 | 2018-09-04 | 江苏长顺高分子材料研究院有限公司 | Material and preparation method thereof is combined for ultralow temperature LNG storage tank storage cold insulation polyurethane coating |
| CN106700018A (en) * | 2016-12-30 | 2017-05-24 | 江苏长顺高分子材料研究院有限公司 | High-flame retardation and high-strength polyurethane heat insulation coat and production method thereof |
| CN106674482A (en) * | 2016-12-30 | 2017-05-17 | 江苏长顺高分子材料研究院有限公司 | Polyurethane spraying composition material used for low temperature, cold insulation and flame retardance and preparation method of polyurethane spraying composition material |
| CN108264624A (en) * | 2018-01-18 | 2018-07-10 | 成都利亨聚氨酯新材料有限公司 | Polyurethane composition polyethers, hard polyurethane foam and preparation method thereof |
| CN109021207A (en) * | 2018-05-22 | 2018-12-18 | 南京红宝丽聚氨酯有限公司 | A kind of hard polyurethane foam for refrigerator |
| CN110483725A (en) * | 2019-08-12 | 2019-11-22 | 张伟 | A kind of fence pile is fixed with foam filled dose and preparation method thereof |
| CN111909339B (en) * | 2020-08-10 | 2022-07-12 | 万华化学（烟台）容威聚氨酯有限公司 | Alkane foaming B1-grade flame-retardant polyurethane rigid foam and preparation method thereof |
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