CN104672423A - Method for preparing polyurethane microcellular elastomer for high-speed railways - Google Patents
Method for preparing polyurethane microcellular elastomer for high-speed railways Download PDFInfo
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- CN104672423A CN104672423A CN201510129467.0A CN201510129467A CN104672423A CN 104672423 A CN104672423 A CN 104672423A CN 201510129467 A CN201510129467 A CN 201510129467A CN 104672423 A CN104672423 A CN 104672423A
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- speed railway
- polyurethane elastomer
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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
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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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
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
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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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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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
- C08G18/65—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
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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)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to a method for preparing polyurethane microcellular elastomer for high-speed railways. The method is used for preparing the polyurethane microcellular elastomer for high-speed railways based on the quasi-prepolymer method, and comprises the following steps: Step 1, preparation of a mixed material, i.e. adding weighed component A into a mixing reaction kettle, fully, uniformly mixing at 35-42 DEG C, and storing the mixed material in a sealed way for later use; Step 2, preparation of prepolymer, i.e. dehydrating weighed component B for 2-3 hours under vacuum at 105-135 DEG C, then cooling to 45-55 DEG C, rapidly adding weighed and molten MDII inside under the condition of high speed mixing, reacting for 2.5 hours at 85-90 DEG C under the condition of uniform mixing, then carrying out vacuum deaerating for 30 minutes and storing in a sealed way for later use; and Step 3, preparation of microcellular elastomer. The method for preparing the polyurethane microcellular elastomer for the high-speed railways disclosed by the invention can be used for producing rubber products with high elasticity, small compression permanent deformation, high damping and excellent abrasion resistance and mechanical properties.
Description
Technical field
The present invention relates to macromolecular material and manufacture field, particularly a kind of preparation method of microporous polyurethane elastomer used for high-speed railway.
Background technology
Along with the continuous lifting of China railways operation speed per hour, ballastless track is laid in a large number because of its outstanding over-all properties on high-speed railway, becomes the development trend of modern railways.Elastic damping pad is the crucial damping means on ballastless track, for ballastless track provides necessary elasticity that the load distribution on rail can be made more reasonable, thus the harm that the internal vibration of reduction car brings.
Domestic rail line vibration attenuation pad material of main part many employings terpolymer EP rubber, styrene-butadiene rubber(SBR), natural rubber etc. before this, product exists that low temperature Static stiffness velocity of variation is large, springrate ratio is large and the defect such as poor durability, increase the derailment coefficients that bullet train is in operation, reduce train operational safety.
Microporous polyurethane elastomer is compared with ordinary rubber, its excellent in mechanical performance, oil resistant and resistance to fatigue good, when same rigidity, polyurethane material intensity is high, good toughness, under Large strain condition, stress under compression transmits uniform and stable, and the most outstanding feature of this material has excellent absorption impact property, is thus widely used in and manufactures vibrationproof buffer product.The resilient sleeper-bearing low temperature Static stiffness velocity of variation of current domestic production, dynamic the Piao Gangdu when performance index such as antifatigue need to be optimized further.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method of high performance microporous polyurethane elastomer used for high-speed railway.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of preparation method of microporous polyurethane elastomer used for high-speed railway, and its innovative point is: described method prepares microporous polyurethane elastomer used for high-speed railway for adopting quasi-prepolymer method.
Further, the concrete steps of described method are as follows:
(1) configuration of premixed systems: the component A of metering is added people in hybrid reactor, fully mix at 35-42 DEG C, preserves stand-by by premixed systems sealing;
(2) preparation of performed polymer: by the B component of metering at 105 ~ 135 DEG C, dehydrated under vacuum 2-3h, then 45-55 DEG C are cooled to, the MDII that meter the most also melts is added rapidly people under fast stirring, in 85-90 DEG C of reaction 2.5h under stirring well, vacuum defoamation 30 min again, sealing is preserved stand-by;
(3) micro-pore elastomer preparation: the mixing head performed polymer of metering and premixed systems being transported to casting molding machine fully mixes to be noted people and be preheated in the aluminum dipping form of 70 ± 3 DEG C afterwards, cast uses ultrasonic vibration, the demoulding after the shaping 10min of matched moulds, sample puts slaking 3 h in people's 100 DEG C of baking ovens, and room temperature carries out Performance Detection after placing l week.
Further, the component A weight part of described metering is polyester polyol 40 ~ 60, fourth hydroxyl polyvalent alcohol 10 ~ 20, chainextender: 4 ~ 20, foam stabilizer 0.2 ~ 2.5, catalyzer 0.2 ~ 10.
Further, the B component weight part of described metering is vulcabond 45 ~ 75, polyester polyol 24 ~ 45, side reaction hold back agent 10 ~ 130ppm.
The invention has the advantages that: the preparation method of microporous polyurethane elastomer used for high-speed railway of the present invention, prepare a kind of cellular structure rubber elastomer of complete unicellular structure, can produce and have that snappiness, compression set are little, the rubber item of high damping, wear resistance and good mechanical performance, can be applicable on high-speed railway and city rail circuit rubber damping product, elevator vibration reduction and cushioning part and vehicle vibration damping part.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is elaborated.
Embodiment 1
A preparation method for microporous polyurethane elastomer used for high-speed railway, the method prepares microporous polyurethane elastomer used for high-speed railway for adopting quasi-prepolymer method, and concrete steps are as follows:
The first step, the configuration of premixed systems: with listed as parts by weight, the weight part of polyester polyol 40 parts, fourth hydroxyl polyvalent alcohol 10 parts, chainextender 4 parts, foam stabilizer 0.2 part, catalyzer 0.2 part adds people in hybrid reactor, fully mixes at 35 DEG C, preserves stand-by by premixed systems sealing;
Second step, the preparation of performed polymer: with listed as parts by weight, vulcabond 45 parts, polyester polyol 24 parts, side reaction hold back agent 10ppm are at 105 DEG C, dehydrated under vacuum 2h, then 45 DEG C are cooled to, the MDI I that meter the most also melts is added rapidly people under fast stirring, in 85 DEG C of reaction 2.5h under stirring well, then vacuum defoamation 30 min, sealing is preserved stand-by;
3rd step, prepared by micro-pore elastomer: the mixing head performed polymer of metering and premixed systems being transported to casting molding machine fully mixes to be noted people and be preheated in the aluminum dipping form of 70 afterwards, cast uses ultrasonic vibration, the demoulding after the shaping 10min of matched moulds, sample puts slaking 3 h in people's 100 DEG C of baking ovens, and room temperature carries out Performance Detection after placing l week.
Embodiment 2
A preparation method for microporous polyurethane elastomer used for high-speed railway, the method prepares microporous polyurethane elastomer used for high-speed railway for adopting quasi-prepolymer method, and concrete steps are as follows:
The first step, the configuration of premixed systems: with listed as parts by weight, the weight part of polyester polyol 52 parts, fourth hydroxyl polyvalent alcohol 12 parts, chainextender 6 parts, foam stabilizer 1.2 parts, catalyzer 4 parts adds people in hybrid reactor, fully mixes at 38 DEG C, preserves stand-by by premixed systems sealing;
Second step, the preparation of performed polymer: with listed as parts by weight, vulcabond 56 parts, polyester polyol 30 parts, side reaction hold back agent 10ppm are at 110 DEG C, dehydrated under vacuum 2.4h, then 48 DEG C are cooled to, the MDII that meter the most also melts is added rapidly people under fast stirring, in 86 DEG C of reaction 2.5h under stirring well, then vacuum defoamation 30 min, sealing is preserved stand-by;
3rd step, prepared by micro-pore elastomer: the mixing head performed polymer of metering and premixed systems being transported to casting molding machine fully mixes to be noted people and be preheated in the aluminum dipping form of 70 ± 3 DEG C afterwards, cast uses ultrasonic vibration, the demoulding after the shaping 10min of matched moulds, sample puts slaking 3 h in people's 100 DEG C of baking ovens, and room temperature carries out Performance Detection after placing l week.
Embodiment 1
A preparation method for microporous polyurethane elastomer used for high-speed railway, the method prepares microporous polyurethane elastomer used for high-speed railway for adopting quasi-prepolymer method, and concrete steps are as follows:
The first step, the configuration of premixed systems: with listed as parts by weight, polyester polyol 60 parts, fourth hydroxyl polyvalent alcohol 20 parts, chainextender 20 parts, foam stabilizer 2.5 parts, catalyzer 10 parts add people in hybrid reactor, fully mix at 42 DEG C, preserve stand-by by premixed systems sealing;
Second step, the preparation of performed polymer: with listed as parts by weight, vulcabond 75 parts, polyester polyol 45 parts, side reaction hold back agent 130ppm, mix and be incorporated in 135 DEG C, dehydrated under vacuum 3h, then be cooled to 55 DEG C, the MDII that meter the most also melts is added rapidly people under fast stirring, in 90 DEG C of reaction 2.5h under stirring well, vacuum defoamation 30 min again, sealing is preserved stand-by;
3rd step, prepared by micro-pore elastomer: the mixing head performed polymer of metering and premixed systems being transported to casting molding machine fully mixes to be noted people and be preheated in the aluminum dipping form of 70 ± 3 DEG C afterwards, cast uses ultrasonic vibration, the demoulding after the shaping 10min of matched moulds, sample puts slaking 3 h in people's 100 DEG C of baking ovens, and room temperature carries out Performance Detection after placing l week.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. a preparation method for microporous polyurethane elastomer used for high-speed railway, is characterized in that: described method prepares microporous polyurethane elastomer used for high-speed railway for adopting quasi-prepolymer method.
2. the preparation method of microporous polyurethane elastomer used for high-speed railway according to claim 1, is characterized in that: the concrete steps of described method are as follows:
The configuration of premixed systems: the component A of metering is added people in hybrid reactor, fully mix at 35-42 DEG C, preserves stand-by by premixed systems sealing;
The preparation of performed polymer: by the B component of metering at 105 ~ 135 DEG C, dehydrated under vacuum 2-3h, then 45-55 DEG C are cooled to, the MDII that meter the most also melts is added rapidly people under fast stirring, in 85-90 DEG C of reaction 2.5h under stirring well, vacuum defoamation 30 min again, sealing is preserved stand-by;
Prepared by micro-pore elastomer: the mixing head performed polymer of metering and premixed systems being transported to casting molding machine fully mixes to be noted people and be preheated in the aluminum dipping form of 70 ± 3 DEG C afterwards, cast uses ultrasonic vibration, the demoulding after the shaping 10min of matched moulds, sample puts slaking 3 h in people's 100 DEG C of baking ovens, and room temperature carries out Performance Detection after placing l week.
3. the preparation method of microporous polyurethane elastomer used for high-speed railway according to claim 1, is characterized in that: the component A weight part of described metering is polyester polyol 40 ~ 60, fourth hydroxyl polyvalent alcohol 10 ~ 20, chainextender: 4 ~ 20, foam stabilizer 0.2 ~ 2.5, catalyzer 0.2 ~ 10.
4. the preparation method of microporous polyurethane elastomer used for high-speed railway according to claim 1, is characterized in that: the B component weight part of described metering is vulcabond 45 ~ 75, polyester polyol 24 ~ 45, side reaction hold back agent 10 ~ 130ppm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510129467.0A CN104672423A (en) | 2015-03-24 | 2015-03-24 | Method for preparing polyurethane microcellular elastomer for high-speed railways |
| PCT/CN2015/097891 WO2016150209A1 (en) | 2015-03-24 | 2015-12-18 | Polyurethane microporous elastomer for use in high-speed railways and preparation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510129467.0A CN104672423A (en) | 2015-03-24 | 2015-03-24 | Method for preparing polyurethane microcellular elastomer for high-speed railways |
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| Publication Number | Publication Date |
|---|---|
| CN104672423A true CN104672423A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510129467.0A Pending CN104672423A (en) | 2015-03-24 | 2015-03-24 | Method for preparing polyurethane microcellular elastomer for high-speed railways |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104672423A (en) |
| WO (1) | WO2016150209A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016150209A1 (en) * | 2015-03-24 | 2016-09-29 | 江苏兴华胶带股份有限公司 | Polyurethane microporous elastomer for use in high-speed railways and preparation method therefor |
| CN108997555A (en) * | 2018-07-24 | 2018-12-14 | 中国铁道科学研究院集团有限公司金属及化学研究所 | A kind of railway freight-car axial direction urethane pad and its preparation method and application |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316205B (en) * | 2021-12-08 | 2023-04-07 | 山东奥卓新材料有限公司 | High-strength low-dynamic-static-stiffness-ratio polyurethane microporous elastic base plate and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4722946A (en) * | 1986-07-03 | 1988-02-02 | Polymer Dynamics (Delaware), Ltd. | Energy-attenuating polyurethanes |
| US20030032757A1 (en) * | 2001-08-02 | 2003-02-13 | Lin Nai W. | Polyurethane elastomers having improved abrasion resistance |
| CN102115588A (en) * | 2009-12-31 | 2011-07-06 | 浙江华峰新材料股份有限公司 | Polyurethane microporous elastomer with characteristics of rubber and preparation method thereof |
| CN102212180A (en) * | 2011-04-29 | 2011-10-12 | 黎明化工研究院 | Microcellular polyurethane elastomer and preparation method thereof |
| CN103665303A (en) * | 2013-11-30 | 2014-03-26 | 山东永泰化工有限公司 | Preparation method of waterproof cellular polyurethane elastomer |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038005A (en) * | 2009-08-12 | 2011-02-24 | Nippon Polyurethane Ind Co Ltd | Manufacturing method of foamed polyurethane elastomer |
| CN101948616B (en) * | 2010-09-13 | 2012-07-18 | 安徽大学 | Microporous polyurethane elastomer shock absorption element for high-speed railway and preparation method thereof |
| CN102585162A (en) * | 2011-12-23 | 2012-07-18 | 山东东大一诺威聚氨酯有限公司 | Microporous polyurethane elastomer compound with excellent dynamic performance and preparation method thereof |
| CN104672423A (en) * | 2015-03-24 | 2015-06-03 | 江苏兴华胶带股份有限公司 | Method for preparing polyurethane microcellular elastomer for high-speed railways |
-
2015
- 2015-03-24 CN CN201510129467.0A patent/CN104672423A/en active Pending
- 2015-12-18 WO PCT/CN2015/097891 patent/WO2016150209A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4722946A (en) * | 1986-07-03 | 1988-02-02 | Polymer Dynamics (Delaware), Ltd. | Energy-attenuating polyurethanes |
| US20030032757A1 (en) * | 2001-08-02 | 2003-02-13 | Lin Nai W. | Polyurethane elastomers having improved abrasion resistance |
| CN102115588A (en) * | 2009-12-31 | 2011-07-06 | 浙江华峰新材料股份有限公司 | Polyurethane microporous elastomer with characteristics of rubber and preparation method thereof |
| CN102212180A (en) * | 2011-04-29 | 2011-10-12 | 黎明化工研究院 | Microcellular polyurethane elastomer and preparation method thereof |
| CN103665303A (en) * | 2013-11-30 | 2014-03-26 | 山东永泰化工有限公司 | Preparation method of waterproof cellular polyurethane elastomer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016150209A1 (en) * | 2015-03-24 | 2016-09-29 | 江苏兴华胶带股份有限公司 | Polyurethane microporous elastomer for use in high-speed railways and preparation method therefor |
| CN108997555A (en) * | 2018-07-24 | 2018-12-14 | 中国铁道科学研究院集团有限公司金属及化学研究所 | A kind of railway freight-car axial direction urethane pad and its preparation method and application |
| CN108997555B (en) * | 2018-07-24 | 2021-05-28 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Railway wagon axial polyurethane pad and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| WO2016150209A1 (en) | 2016-09-29 |
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Application publication date: 20150603 |