CN113024764A - Polyurethane elastomer and preparation method thereof - Google Patents
Polyurethane elastomer and preparation method thereof Download PDFInfo
- Publication number
- CN113024764A CN113024764A CN202110320961.0A CN202110320961A CN113024764A CN 113024764 A CN113024764 A CN 113024764A CN 202110320961 A CN202110320961 A CN 202110320961A CN 113024764 A CN113024764 A CN 113024764A
- Authority
- CN
- China
- Prior art keywords
- polyurethane elastomer
- parts
- prepolymer
- vulcanization treatment
- polytetrahydrofuran ether
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920003225 polyurethane elastomer Polymers 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229920000909 polytetrahydrofuran Polymers 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000004073 vulcanization Methods 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 13
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical group C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000035484 reaction time Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims 2
- -1 ether diol Chemical class 0.000 claims 1
- 210000001503 joint Anatomy 0.000 abstract description 5
- 241001112258 Moca Species 0.000 description 7
- 229920001971 elastomer Polymers 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000012258 stirred mixture Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3802—Low-molecular-weight compounds having heteroatoms other than oxygen having halogens
- C08G18/3814—Polyamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention provides a polyurethane elastomer and a preparation method and application thereof, and belongs to the technical field of horizontal elastic buffer parts. The polyurethane elastomer is prepared by taking polytetrahydrofuran ether dihydric alcohol, 2, 4-toluene diisocyanate and a vulcanizing agent as raw materials, and a finished product is obtained by preparing a prepolymer and vulcanizing the prepolymer. The polyurethane elastomer obtained by the raw materials and the preparation method has high tensile strength and tearing strength, high elongation at break and strong loading capacity, and greatly improves the service performance of the horizontal elastic buffer piece in the application of the horizontal elastic buffer piece of the pile leg butt joint buffer device.
Description
Technical Field
The invention relates to the technical field of horizontal elastic buffering parts, in particular to a polyurethane elastomer and a preparation method thereof.
Background
Along with the fact that offshore oil field exploration and development and offshore wind power development are continuously approaching to deep sea and far sea, the trend of large-scale and intensive development of offshore platforms is inevitable, and higher requirements are provided for installation technology and operation capacity of the large-scale offshore platforms. The traditional installation mode of the upper module of the super ten-thousand-ton platform is generally divided into two modes of hoisting and integral floating and supporting, and the mode of using a large semi-submersible crane ship has the disadvantages of low adoption of the technology in the deep water field due to high cost, and the floating and supporting method is most economical and reliable. The pile leg butt joint buffer device is a key component applied to the floating support method construction technology, and the horizontal elastic buffer part is an important component in the pile leg butt joint buffer device and plays a role in buffering horizontal direction collision.
The material of the horizontal elastomeric cushioning member directly affects the performance of the horizontal elastomeric cushioning member. Because the horizontal elastic buffer needs to bear larger load under smaller volume, the traditional rubber material cannot meet the use requirement of the horizontal elastic buffer.
Disclosure of Invention
The invention aims to provide a polyurethane elastomer and a preparation method thereof, which greatly improve the service performance of a horizontal elastic buffer.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a polyurethane elastomer which is prepared from the following raw materials in parts by weight:
90-110 parts of polytetrahydrofuran ether dihydric alcohol
35-40 parts of 2, 4-toluene diisocyanate
15-20 parts of a vulcanizing agent.
Further, the vulcanizing agent is 3,3 '-dichloro-4, 4' -diaminodiphenylmethane.
The invention provides a preparation method of a polyurethane elastomer, which comprises the following steps:
mixing polytetrahydrofuran ether dihydric alcohol and 2, 4-toluene diisocyanate for reaction to prepare a prepolymer;
and mixing the prepolymer and a vulcanizing agent, and then vulcanizing to obtain a finished product.
Furthermore, the reaction temperature of the polytetrahydrofuran ether dihydric alcohol and the 2, 4-toluene diisocyanate is 70-90 ℃, and the reaction time is 1-3 h.
Further, the vulcanization treatment comprises a primary vulcanization treatment and a secondary vulcanization treatment which are sequentially carried out.
Further, the temperature of the primary vulcanization treatment is 120-130 ℃, and the time is 15-30 min.
Further, the temperature of the secondary vulcanization treatment is 90-95 ℃, and the time is 9-11 hours.
The invention provides an application of a polyurethane elastomer in a pile leg butt joint buffer device.
The invention has the beneficial effects that:
the polyurethane elastomer obtained by the method has the characteristics of wide hardness range, high strength, large performance adjustable range, wear resistance and the like, and still has good rubber elasticity and elongation under high hardness. Under the same hardness, the tensile strength and the tearing strength of the polyurethane are much higher than those of general rubber, and the use requirement of the horizontal elastic buffer piece can be well met. Particularly, the casting polyurethane elastomer has simple molding process, the formed elastomer has high molecular integrity, and the advantages of the polyurethane elastomer can be exerted to the maximum extent.
Detailed Description
The invention provides a polyurethane elastomer which is prepared from the following raw materials in parts by weight:
90-110 parts of polytetrahydrofuran ether dihydric alcohol
35-40 parts of 2, 4-toluene diisocyanate
15-20 parts of a vulcanizing agent.
In the present invention, the amount of the polytetrahydrofuran ether glycol added is 90 to 110 parts, preferably 95 to 105 parts, and more preferably 98 to 102 parts.
In the present invention, the amount of the 2, 4-tolylene diisocyanate added is 35 to 40 parts, preferably 36 to 39 parts, and more preferably 38 parts.
In the invention, the addition amount of the vulcanizing agent is 15-20 parts, preferably 16-19 parts, and more preferably 18 parts; the vulcanizing agent in the present invention is preferably 3,3 '-dichloro-4, 4' -diaminodiphenylmethane (MOCA).
The invention provides a preparation method of a polyurethane elastomer, which comprises the following steps:
mixing polytetrahydrofuran ether dihydric alcohol and 2, 4-toluene diisocyanate for reaction to prepare a prepolymer;
and mixing the prepolymer and a vulcanizing agent, and then vulcanizing to obtain a finished product.
In the invention, the polytetrahydrofuran ether glycol needs to be dehydrated before reaction, and the dehydration temperature is 110-130 ℃, preferably 115-125 ℃, and more preferably 120 ℃; the polytetrahydrofuran ether dihydric alcohol is dehydrated until the moisture content is below 0.1%, and preferably below 0.05%.
In the invention, the reaction temperature of the polytetrahydrofuran ether dihydric alcohol and the 2, 4-toluene diisocyanate is 70-90 ℃, preferably 75-85 ℃, and further preferably 80 ℃; the reaction time is 1-3 h, preferably 1.5-2.5 h, and more preferably 2 h.
In the invention, before the vulcanization treatment, the step of vacuumizing and defoaming the prepolymer is also included.
In the invention, before the vulcanization treatment, the vulcanizing agent is melted at 110-130 ℃, wherein the melting treatment temperature is preferably 115-125 ℃, and more preferably 120 ℃.
In the present invention, the vulcanization treatment includes a primary vulcanization treatment and a secondary vulcanization treatment which are sequentially performed.
In the invention, the temperature of the first-stage vulcanization treatment is 120-130 ℃, preferably 122-128 ℃, and further preferably 125 ℃; the time is 15-30 min, preferably 20-25 ℃, and more preferably 23 ℃.
In the invention, the temperature of the secondary vulcanization treatment is 90-95 ℃, preferably 93 ℃, and the time is 9-11 h, preferably 9.5-10.5 h, and further preferably 10 h.
The invention provides an application of a polyurethane elastomer in a pile leg butt joint buffer device.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
100 parts of polytetrahydrofuran ether dihydric alcohol dehydrated at 120 ℃ and 35 parts of 2,4-TDI are fully stirred in a reaction container to synthesize a prepolymer, the reaction temperature is controlled at 80 ℃, and the reaction time is 2 hours. Vacuumizing the obtained prepolymer to remove bubbles, weighing 15 parts of MOCA, and heating to 120 ℃ for melting; the water content of the polytetrahydrofuran ether dihydric alcohol is below 0.05%.
Mixing the degassed prepolymer and the melted MOCA, uniformly stirring, vacuumizing and defoaming the uniformly stirred mixture again, injecting the mixture into a preheated mold, closing the mold when the mixture does not flow, and placing the mold in a vulcanizing machine for mold pressing and vulcanizing; wherein the first-stage vulcanization temperature is 120 ℃, the vulcanization is carried out for 15min, the molded and vulcanized product is put in the environment of 90 ℃ for continuous vulcanization for 10h, and the finished product is obtained after the product is placed at room temperature for 1 week.
Example 2
100 parts of polytetrahydrofuran ether dihydric alcohol dehydrated at 110 ℃ and 38 parts of 2,4-TDI are fully stirred in a reaction container to synthesize a prepolymer, the reaction temperature is controlled at 75 ℃, and the reaction time is 2.5 hours. Vacuumizing the obtained prepolymer to remove bubbles, weighing 17 parts of MOCA, and heating to 120 ℃ for melting; the water content of the polytetrahydrofuran ether dihydric alcohol is below 0.05%.
Mixing the degassed prepolymer and the melted MOCA, uniformly stirring, vacuumizing and defoaming the uniformly stirred mixture again, injecting the mixture into a preheated mold, closing the mold when the mixture does not flow, and placing the mold in a vulcanizing machine for mold pressing and vulcanizing; wherein the primary vulcanization temperature is 125 ℃, the vulcanization is carried out for 20min, the molded and vulcanized product is put in an environment of 93 ℃ for continuous vulcanization for 9h, and the finished product is obtained after the product is placed at room temperature for 1 week.
Example 3
100 parts of polytetrahydrofuran ether dihydric alcohol dehydrated at 130 ℃ and 40 parts of 2,4-TDI are fully stirred in a reaction container to synthesize a prepolymer, the reaction temperature is controlled at 90 ℃, and the reaction time is 35 hours. Vacuumizing the obtained prepolymer to remove bubbles, weighing 20 parts of MOCA, and heating to 120 ℃ for melting; the water content of the polytetrahydrofuran ether dihydric alcohol is below 0.05%.
Mixing the degassed prepolymer and the melted MOCA, uniformly stirring, vacuumizing and defoaming the uniformly stirred mixture again, injecting the mixture into a preheated mold, closing the mold when the mixture does not flow, and placing the mold in a vulcanizing machine for mold pressing and vulcanizing; wherein the first-stage vulcanization temperature is 130 ℃, the vulcanization is carried out for 25min, the molded and vulcanized product is put in the environment of 95 ℃ for continuous vulcanization for 11h, and the finished product is obtained after the product is placed at room temperature for 1 week.
The properties of the polyurethane elastomers obtained in examples 1 to 3 of the present application are shown in the following table:
TABLE 1
From the above examples, it can be seen that the present invention provides a polyurethane elastomer and a method for preparing the same. According to the embodiment, the polyurethane elastomer obtained by the application has better rubber elasticity and elongation, and under the same hardness, the tensile strength and the tearing strength of the polyurethane elastomer obtained by the application are much higher than those of general rubber, so that the use requirement of a horizontal elastic buffer can be well met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The polyurethane elastomer is characterized by being prepared from the following raw materials in parts by weight:
90-110 parts of polytetrahydrofuran ether dihydric alcohol
35-40 parts of 2, 4-toluene diisocyanate
15-20 parts of a vulcanizing agent.
2. The polyurethane elastomer of claim 1, wherein the vulcanizing agent is 3,3 '-dichloro-4, 4' -diaminodiphenylmethane.
3. The method for producing the polyurethane elastomer according to claim 1 or 2, comprising the steps of:
mixing polytetrahydrofuran ether dihydric alcohol and 2, 4-toluene diisocyanate for reaction to prepare a prepolymer;
and mixing the prepolymer and a vulcanizing agent, and then vulcanizing to obtain a finished product.
4. The method for preparing polyurethane elastomer according to claim 3, wherein the reaction temperature of polytetrahydrofuran ether diol and 2, 4-toluene diisocyanate is 70-90 ℃ and the reaction time is 1-3 h.
5. The production method of a polyurethane elastomer according to claim 4, wherein the vulcanization treatment comprises a primary vulcanization treatment and a secondary vulcanization treatment which are carried out in sequence;
the temperature of the primary vulcanization treatment is 120-130 ℃, and the time is 15-30 min.
6. The method for preparing polyurethane elastomer according to claim 5, wherein the temperature of the secondary vulcanization treatment is 90-95 ℃ and the time is 9-11 hours.
7. Use of the polyurethane elastomer according to any one of claims 1 to 2 or the polyurethane elastomer obtained by the preparation method according to any one of claims 3 to 6 in a leg butt-joint buffer device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320961.0A CN113024764A (en) | 2021-03-25 | 2021-03-25 | Polyurethane elastomer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320961.0A CN113024764A (en) | 2021-03-25 | 2021-03-25 | Polyurethane elastomer and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113024764A true CN113024764A (en) | 2021-06-25 |
Family
ID=76473794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110320961.0A Pending CN113024764A (en) | 2021-03-25 | 2021-03-25 | Polyurethane elastomer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113024764A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030066129A (en) * | 2002-02-04 | 2003-08-09 | 에스케이씨 주식회사 | Composition for Polyurethane Elastomer Having High Hardness and Excellent Abrasion Resistance |
| CN1546568A (en) * | 2003-12-09 | 2004-11-17 | 太原理工大学 | Polyaminoester /molecular sieve composite material and its preparation method |
| CN101096410A (en) * | 2007-06-22 | 2008-01-02 | 姜海军 | Rubber material for manufacturing city railway vehicle rubber wheel |
| CN103923457A (en) * | 2014-03-27 | 2014-07-16 | 黎明化工研究设计院有限责任公司 | High abrasion-resistance polyurethane elastomer and preparation method thereof |
| CN106188468A (en) * | 2016-07-21 | 2016-12-07 | 淄博德信联邦化学工业有限公司 | Polyurethane elastomer antifreezing water pipe liner and preparation method thereof |
-
2021
- 2021-03-25 CN CN202110320961.0A patent/CN113024764A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030066129A (en) * | 2002-02-04 | 2003-08-09 | 에스케이씨 주식회사 | Composition for Polyurethane Elastomer Having High Hardness and Excellent Abrasion Resistance |
| CN1546568A (en) * | 2003-12-09 | 2004-11-17 | 太原理工大学 | Polyaminoester /molecular sieve composite material and its preparation method |
| CN101096410A (en) * | 2007-06-22 | 2008-01-02 | 姜海军 | Rubber material for manufacturing city railway vehicle rubber wheel |
| CN103923457A (en) * | 2014-03-27 | 2014-07-16 | 黎明化工研究设计院有限责任公司 | High abrasion-resistance polyurethane elastomer and preparation method thereof |
| CN106188468A (en) * | 2016-07-21 | 2016-12-07 | 淄博德信联邦化学工业有限公司 | Polyurethane elastomer antifreezing water pipe liner and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 刘厚钧: "《聚氨酯弹性体手册》", 31 May 2012, 化学工业出版社 * |
| 刘长生: "《高分子化学与高分子物理综合实验教程》", 30 November 2008, 中国地质大学出版社 * |
| 叶蕊: "《实用塑料加工技术》", 30 November 2000, 金盾出版社 * |
| 李绍雄等: "《聚氨酯树脂及其应用》", 30 November 2011, 化学工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101486834A (en) | High performance nano polyurethane micropore elastomer composite material and preparation thereof | |
| CN113461900B (en) | Low-static-rigidity polyurethane microporous elastic base plate with low-temperature static rigidity change rate | |
| CN110437412B (en) | Polyurethane wood-like material and preparation method thereof | |
| WO2009129944A1 (en) | Polyurethane elastomers, the method for preparing the same and the use thereof | |
| CN111138624A (en) | Polyurethane resin for high-physical-property breathable insole and preparation method thereof | |
| CN107286835A (en) | A kind of monocomponent high elastic silylated polyurethane water-repellent paint and its production method | |
| CN111662426B (en) | Strong-support high-elasticity polyurethane soft foam material and preparation method thereof | |
| CN113307930B (en) | Cold-resistant high-static-stiffness polyurethane microporous elastic base plate | |
| CN113307940B (en) | Low-temperature-resistant middle-static-stiffness polyurethane microporous elastic base plate | |
| CN113024764A (en) | Polyurethane elastomer and preparation method thereof | |
| CN102250307A (en) | Biobased micro-porous polyurethane material and preparation method thereof | |
| CN113174028A (en) | Full-water foaming polyurethane foam and preparation method and application thereof | |
| CN113896859B (en) | Bio-based polyurethane damping material and preparation method and application thereof | |
| CN106397724B (en) | Low-cost polyurethane material for filling inner part of safety tire and using method thereof | |
| CN109401087A (en) | A kind of rubber absorbers and preparation method thereof | |
| CN112375205A (en) | Preparation method and application of high-strength polyurethane elastomer | |
| CN114276515A (en) | Polyurethane microporous elastic base plate with ultrahigh strength and low dynamic-static stiffness ratio and preparation method thereof | |
| CN112521572B (en) | Polyurethane foamable composition, polyurethane foam, and method for producing same | |
| CN114133856A (en) | Low-density porous all-plastic spraying polyurethane runway slurry and preparation and use methods thereof | |
| CN106957407B (en) | CHDI is modified MDI base polyurethane micropore method for producing elastomers | |
| CN113831492B (en) | Preparation method of polyurethane elastomer for steel rail energy consumption piece, polyurethane elastomer and energy consumption piece | |
| CN106995523B (en) | CHDI is modified NDI base polyurethane micropore method for producing elastomers | |
| CN114836160B (en) | Room-temperature fast-curing high-elasticity wide-temperature broadband MS/epoxy damping adhesive and preparation method thereof | |
| CN109503803A (en) | A kind of preparation method of car trunk back cover board polyurethane foam board | |
| CN114805745B (en) | Wear-resistant high-damping slow-rebound polyurethane foam material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210625 |
|
| RJ01 | Rejection of invention patent application after publication |