CN105348471A - Elastic pad plate capable of reducing and isolating vibration and preparation technology thereof - Google Patents

Elastic pad plate capable of reducing and isolating vibration and preparation technology thereof Download PDF

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Publication number
CN105348471A
CN105348471A CN201510789260.6A CN201510789260A CN105348471A CN 105348471 A CN105348471 A CN 105348471A CN 201510789260 A CN201510789260 A CN 201510789260A CN 105348471 A CN105348471 A CN 105348471A
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CN
China
Prior art keywords
bearing
shock insulation
resilient sleeper
potting syrup
insulation resilient
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CN201510789260.6A
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Chinese (zh)
Inventor
姜媛
孙美蓉
王释纬
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Jing Jia Lian (beijing) New Material Technology Co Ltd
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Jing Jia Lian (beijing) New Material Technology Co Ltd
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Priority to CN201510789260.6A priority Critical patent/CN105348471A/en
Publication of CN105348471A publication Critical patent/CN105348471A/en
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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
    • 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
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/22—Component parts, details or accessories; Auxiliary operations
    • B29C39/44—Measuring, controlling or regulating
    • 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
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • 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
    • C08G18/3225—Polyamines
    • C08G18/3228—Polyamines acyclic
    • 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
    • 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
    • C08G2101/00—Manufacture of cellular products

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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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to the technical field of railway tracks, and especially relates to an elastic pad plate capable of reducing and isolating vibration and a preparation technology thereof. The elastic pad plate capable of reducing and isolating vibration comprises, in percent by weight, 3%-30% of an isocyanate, 20%-60% of polyol, and 2%-35% of a chain extender or a cross-linking agent. According to the provided elastic pad plate capable of reducing and isolating vibration and the preparation technology thereof, by utilizing the isocyanate, polyol and the chain extender or cross-linking agent, performing metering and mixing through a casting machine and adjusting proper technological parameters, the elastic pad plate capable of reducing and isolating vibration and absorbing sound and reducing noise is produced, and is widely applicable to fields of construction of high-speed railways, intercity railways and subways.

Description

Subtract shock insulation resilient sleeper-bearing and preparation technology thereof
Technical field
The present invention relates to railroad track technical field, especially relate to one and subtract shock insulation resilient sleeper-bearing and preparation technology thereof.
Background technology
Along with the high speed development of railway traffic, the technical requirements of steady, the low vibrations of the driving for train and low noise is more and more higher.Usually three kinds of methods are had in order to improve the damping noise reduction performance of rail system in existing technology.The rigidity of one for a change rail fastener system, increases track plates elasticity, reaches the object of damping.But the area due to fastener in fastener system is less, make it can only improve the performance of damping to a certain extent.It two is filled bitumen polymer mortar (CA mortar) under track plates.But because the face rigidity of CA mortar is excessive, damping effect is also not obvious, and its toughness shortcoming, cohesive force are little, easily cause bonding failure and stress point fragmentation, can not meet the high speed development of track traffic.Three is overlay elastomerics bed course under track plates.
Such as Chinese patent CN101469084A provides a kind of yielding rubber plate, and the proportioning of described vibration damper plate comprises natural rubber, styrene-butadiene rubber(SBR), isoprene-isobutylene rubber and vinylbenzene.Although can provide certain buffering and damping effect, owing to there is carbon-carbon double bond in natural rubber and styrene-butadiene rubber(SBR), its ageing-resistant performance and weather resistance are also excellent not, and therefore can not meet the circuit operation of high frequency time.
Chinese patent CN104311935A provides a kind of yielding rubber backing plate, employing chloroprene rubber is main raw, because the rigidity of chloroprene rubber is bigger than normal, certain buffering and damping effect can only be provided, and there is carbon-carbon double bond in chloroprene rubber, ageing-resistant performance and weather resistance can not meet the demands equally.
But, rubber shock-absorbing plate of the prior art, ageing-resistant performance and weather resistance poor, make when using on a large scale, homogeneity be difficult to ensure, apply in high-grade damping railway and be restricted.
Summary of the invention
The object of the present invention is to provide and subtract shock insulation resilient sleeper-bearing and preparation technology thereof, with solve the ageing-resistant performance that exists in prior art and weather resistance poor, make when using on a large scale, homogeneity is difficult to ensure, in high-grade damping railway, apply the technical problem be restricted.
One provided by the invention subtracts shock insulation resilient sleeper-bearing, comprises isocyanic ester and polyvalent alcohol, and chainextender or linking agent; By weight percentage, the isocyanic ester containing 3%-30% and 20%-60% polyvalent alcohol, and the chainextender of 2%-35% or linking agent.
Further, subtract shock insulation resilient sleeper-bearing and also comprise equal infusion; The weight percent of equal infusion is 0.5%-5%.
Further, subtract shock insulation resilient sleeper-bearing and also comprise catalyzer; The weight percent of catalyzer is 0.01%-3%.
Further, subtract shock insulation resilient sleeper-bearing and also comprise pigment; The weight percent of pigment is 0.01%-5%.
Further, equal infusion is silicoorganic compound.
Further, catalyzer is metallic salt.
Further, isocyanate group (NCO) the content 3%-50% of isocyanic ester, the hydroxyl value of polyvalent alcohol is 5mgKOH/g-500mgKOH/g, and the functionality of chainextender or linking agent is 2-8.
Further, the volume subtracting shock insulation resilient sleeper-bearing is 0.001m 3-10m 3.
Present invention also offers a kind of preparation technology subtracting shock insulation resilient sleeper-bearing, it is characterized in that, specifically comprise the steps:
Using isocyanic ester as the first potting syrup, by polyvalent alcohol, all infusion, catalyzer and pigment, and the mixture of chainextender or linking agent is as the second potting syrup;
First potting syrup and the second potting syrup are put into respectively to the storage vat of two on casting molding machine;
Utilize casting molding machine the first potting syrup and the second potting syrup to be injected in mould, and curing conservation become to subtract shock insulation resilient sleeper-bearing;
The anti-drying room of putting into of shock insulation resilient sleeper-bearing will be subtracted carry out heat treated and get product.
Further, casting molding machine is utilized to be injected in mould by the first potting syrup and the second potting syrup, and curing conservation becomes to subtract in the step of shock insulation resilient sleeper-bearing, the temperature of the first potting syrup and the second potting syrup 5 DEG C-115 DEG C, pouring speed is 0.1kg/min-40kg/min, die temperature is 20 DEG C-130 DEG C, and the duration of pouring is 0.03min-60min, and the time of curing conservation is 0h-10h.
Provided by the inventionly subtract shock insulation resilient sleeper-bearing and preparation technology thereof, utilize isocyanic ester and polyvalent alcohol, and chainextender or linking agent are poured into a mould by casting molding machine, material is fully merged, the ageing-resistant performance and weather resistance that subtract shock insulation resilient sleeper-bearing can be improve, when using on a large scale, the homogeneity subtracting shock insulation resilient sleeper-bearing can be ensured, being widely used in high-speed railway, intercity track and subway construction field.
Accompanying drawing explanation
The schema subtracting the preparation technology of shock insulation resilient sleeper-bearing that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
One provided by the invention subtracts shock insulation resilient sleeper-bearing, comprises isocyanic ester and polyvalent alcohol, and chainextender or linking agent; By weight percentage, the isocyanic ester containing 3%-30% and 20%-60% polyvalent alcohol, and the chainextender of 2%-35% or linking agent.
Wherein, the kind of isocyanic ester can be multiple, such as: diphenylmethanediisocyanate (TDI), 4,4-diphenylmethanediisocyanate (MDI), liquefied mdi (Bayer A.G, and modification MDI (Jing Jia Linkage (Beijing) new material technology company limited, MDI-30) etc. MDI-103C).
The kind of polyvalent alcohol can be multiple, such as: polyether-tribasic alcohol (TMP330M, Tianjin the 3rd petrochemical complex company limited), polyether Glycols (DDL1000, the large Chemical Group in east, Shandong), polyether Glycols (DDL2000, the large Chemical Group in east, Shandong) and polyethers tetravalent alcohol (JLC-500, Jing Jia Linkage (Beijing) new material technology company limited) etc.
The kind of chainextender can be multiple, such as: BDO, propylene glycol, ethylene glycol, 4,4-dichloro-diphenyl methane diamines (MOCA), quadrol, diethylenetriamine and triethylene diamine etc.
The kind of linking agent can be multiple, such as: dicumyl peroxide (DCP), benzoyl peroxide (BPO), ditertiary butyl peroxide (DTBP) or di-isopropylbenzene hydroperoxide (DBHP).
Isocyanate content can in 3%-30% any content, such as: the content of isocyanic ester can be: 3%-4.5%, 4.5%-6%, 6%-7.5%, 7.5%-9%, 9%-10.5%, 10.5%-12%, 12%-13.5%, 13.5%-15%, 15%-16.5%, 16.5%-18%, 18%-19.5%, 19.5%-21%, 21%-22.5%, 22.5%-24%, 24%-25.5%, 25.5%-27%, 27%-28.5% or 28.5%-30%;
Be preferably 7.5%-9%, 9%-10.5%, 10.5%-12%, 12%-13.5%, 13.5%-15%, 15%-16.5%, 16.5%-18%, 18%-19.5%, 19.5%-21% or 21%-22.5%;
Particularly preferably 9%-10.5%, 10.5%-12%, 12%-13.5%, 13.5%-15%, 15%-16.5% or 16.5%-18%.
The content of polyvalent alcohol can be any number scope in 20%-60%, such as: the content of polyvalent alcohol can be 20%-22%, 22%-24%, 24%-26%, 26%-28%, 28%-30%, 30%-32%, 32%-34%, 34%-36%, 36%-38%, 38%-40%, 40%-42%, 42%-44%, 44%-46%, 46%-48%, 48%-50%, 50%-52%, 52%-54%, 54%-56%, 56%-58% or 58%-60%;
Be preferably 30%-32%, 32%-34%, 34%-36%, 36%-38%, 38%-40%, 40%-42%, 42%-44%, 44%-46%, 46%-48% or 48%-50%;
Particularly preferably: 34%-36%, 36%-38%, 38%-40%, 40%-42% or 42%-44%.
The content of chainextender or linking agent can any number scope in 2%-35%, such as: the content of chainextender or linking agent is 2%-4.5%, 4.5%-6%, 6%-7.5%, 7.5%-9%, 9%-10.5%, 10.5%-12%, 12%-13.5%, 13.5%-15%, 15%-16.5%, 16.5%-18%, 18%-19.5%, 19.5%-21%, 21%-22.5%, 22.5%-24%, 24%-25.5%, 25.5%-27%, 27%-28.5%, 28.5%-30%, 30%-31.5%, 31.5%-33% or 33%-35%;
Be preferably 7.5%-9%, 9%-10.5%, 10.5%-12%, 12%-13.5%, 13.5%-15%, 15%-16.5%, 16.5%-18%, 18%-19.5%, 19.5%-21% or 21%-22.5%;
Particularly preferably 9%-10.5%, 10.5%-12%, 12%-13.5%, 13.5%-15%, 15%-16.5% or 16.5%-18%.
What the present embodiment provided subtracts shock insulation resilient sleeper-bearing and preparation technology thereof, utilize isocyanic ester and polyvalent alcohol, and chainextender or linking agent are poured into a mould by casting molding machine, material is fully merged, forming amino-formate bond, cross-link bond, hard section hydrogen bond etc., the ageing-resistant performance and weather resistance that subtract shock insulation resilient sleeper-bearing can being improve, when using on a large scale, the homogeneity subtracting shock insulation resilient sleeper-bearing can be ensured, be applied to high-grade urban rail transit construction field.
On the basis of above-described embodiment, in order to make can evenly to merge and foam between each component, further, subtract shock insulation resilient sleeper-bearing and also comprise equal infusion; The weight percent of equal infusion is 0.5%-5%.
Wherein, foam stabilizer is silicoorganic compound.
The content of described foam stabilizer is 0.5%-5% any number scope, such as: the content of foam stabilizer is: 0.5%-0.75%, 0.75%-1%, 1%-1.25%, 1.25%-1.5%, 1.5%-1.75%, 1.75%-2%, 2%-2.25%, 2.25%-2.5%, 2.5%-2.75%, 2.75%-3%, 3%-3.25%, 3.25%-3.5%, 3.5%-3.75%, 3.75%-4%, 4%-4.25%, 4.25%-4.5%, 4.5%-4.75% or 4.75%-5%;
Be preferably 1.5%-1.75%, 1.75%-2%, 2%-2.25%, 2.25%-2.5%, 2.5%-2.75%, 2.75%-3%, 3%-3.25%, 3.25%-3.5%, 3.5%-3.75% or 3.75%-4%;
Particularly preferably: 2%-2.25%, 2.25%-2.5%, 2.5%-2.75%, 2.75%-3%, 3%-3.25% or 3.25%-3.5%.
On the basis of above-described embodiment, in order to the rapid polymerization solidification between each component can be accelerated, further, subtract shock insulation resilient sleeper-bearing and also comprise catalyzer; The weight percent of catalyzer is 0.01%-3%.
Wherein, catalyzer is metallic salt, such as: stannous octoate, tin dilaurate and butyl tin, triethylene diamine, A33 (Jing Jia Linkage (Beijing) new material technology company limited) and isocaprylic acid are plumbous, zinc naphthenate and lead naphthenate etc.
The content of catalyzer is any number scope in 0.01%-3%, such as: the content of catalyzer is: 0.01%-0.15%, 0.15%-0.3%, 0.3%-0.45%, 0.45%-0.6%, 0.6%-0.75%, 0.75%-0.9%, 0.9%-1.05%, 1.05%-1.2%, 1.2%-1.35%, 1.35%-1.5%, 1.5%-1.65%, 1.65%-1.8%, 1.8%-1.95%, 1.95%-2.1%, 2.1%-2.25%, 2.25%-2.4%, 2.4%-2.55%, 2.55%-2.7%, 2.7%-2.85% or 2.85%-3%.
Be preferably 0.75%-0.9%, 0.9%-1.05%, 1.05%-1.2%, 1.2%-1.35%, 1.35%-1.5%, 1.5%-1.65%, 1.65%-1.8%, 1.8%-1.95%, 1.95%-2.1% or 2.1%-2.25%;
Be particularly preferably 1.05%-1.2%, 1.2%-1.35%, 1.35%-1.5%, 1.5%-1.65%, 1.65%-1.8% or 1.8%-1.95%.
On the basis of above-described embodiment, further, subtract shock insulation resilient sleeper-bearing and also comprise pigment; The weight percent of pigment is 0.01%-5%.
Pigment content is any number scope in 01%-5%, such as: the content of pigment is 0.01%-0.25%, 0.25%-5%, 0.5%-0.75%, 0.75%-1%, 1%-1.25%, 1.25%-1.5%, 1.5%-1.75%, 1.75%-2%, 2%-2.25%, 2.25%-2.5%, 2.5%-2.75%, 2.75%-3%, 3%-3.25%, 3.25%-3.5%, 3.5%-3.75%, 3.75%-4%, 4%-4.25%, 4.25%-4.5%, 4.5%-4.75% or 4.75%-5%;
Be preferably: 1.25%-1.5%, 1.5%-1.75%, 1.75%-2%, 2%-2.25%, 2.25%-2.5%, 2.5%-2.75%, 2.75%-3%, 3%-3.25%, 3.25%-3.5% or 3.5%-3.75%;
Particularly preferably: 1.75%-2%, 2%-2.25%, 2.25%-2.5%, 2.5%-2.75%, 2.75%-3% or 3%-3.25%.
On the basis of above-described embodiment, the damping of shock insulation resilient sleeper-bearing, sound insulation and the performance such as anti-aging is subtracted in order to improve further, further, isocyanate group (NCO) the content 3%-50% of isocyanic ester, the hydroxyl value of polyvalent alcohol is 5mgKOH/g-500mgKOH/g, and the functionality of chainextender or linking agent is 2-8.
Wherein, isocyanic ester (NCO) content of isocyanic ester is: 3%-5%, 5%-7.5%, 7.5%-10%, 10%-12.5%, 12.5%-15%, 15%-17.5%, 17.5%-20%, 20%-22.5%, 22.5%-25%, 25%-27.5%, 27.5%-30%, 30%-32.5%, 32.5%-35%, 35%-37.5%, 37.5%-40%, 40%-42.5%, 42.5%-45%, 45%-47.5% or 47.5%-50%:
Be preferably 10%-12.5%, 12.5%-15%, 15%-17.5%, 17.5%-20%, 20%-22.5%, 22.5%-25%, 25%-27.5%, 27.5%-30%, 30%-32.5% or 32.5%-35%;
Particularly preferably: 15%-17.5%, 17.5%-20%, 20%-22.5%, 22.5%-25%, 25%-27.5% or 27.5%-30%.
The hydroxyl value of polyvalent alcohol is: 5mgKOH/g-25mgKOH/g, 25mgKOH/g-50mgKOH/g, 50mgKOH/g-75mgKOH/g, 75mgKOH/g-100mgKOH/g, 100mgKOH/g-125mgKOH/g, 125mgKOH/g-150mgKOH/g, 150mgKOH/g-175mgKOH/g, 175mgKOH/g-200mgKOH/g, 200mgKOH/g225-mgKOH/g, 225mgKOH/g-250mgKOH/g, 250mgKOH/g-275mgKOH/g, 275mgKOH/g-300mgKOH/g, 300mgKOH/g-325mgKOH/g, 325mgKOH/g-350mgKOH/g, 350mgKOH/g-375mgKOH/g, 375mgKOH/g-400mgKOH/g, 400mgKOH/g-425mgKOH/g, 425mgKOH/g-450mgKOH/g, 450mgKOH/g-475mgKOH/g or 475mgKOH/g-500mgKOH/g,
Be preferably: 125mgKOH/g-150mgKOH/g, 150mgKOH/g-175mgKOH/g, 175mgKOH/g-200mgKOH/g, 200mgKOH/g225-mgKOH/g, 225mgKOH/g-250mgKOH/g, 250mgKOH/g-275mgKOH/g, 275mgKOH/g-300mgKOH/g, 300mgKOH/g-325mgKOH/g, 325mgKOH/g-350mgKOH/g or 350mgKOH/g-375mgKOH/g;
Particularly preferably: 175mgKOH/g-200mgKOH/g, 200mgKOH/g225-mgKOH/g, 225mgKOH/g-250mgKOH/g, 250mgKOH/g-275mgKOH/g, 275mgKOH/g-300mgKOH/g or 300mgKOH/g-325mgKOH/g.
The functionality of chainextender or linking agent is 2-8; Be preferably 3-7; Be particularly preferably 3-5.
On the basis of above-described embodiment, further, the volume subtracting shock insulation resilient sleeper-bearing is 0.001m 3-10m 3.
Wherein, the volume subtracting shock insulation resilient sleeper-bearing is 0.001m 3-0.5m 3, 0.5m 3-1m 3, 1m 3-1.5m 3, 1.5m 3-2m 3, 2m 3-2.5m 3, 2.5m 3-3m 3, 3m 3-3.5m 3, 3.5m 3-4m 3, 4m 3-4.5m 3, 4.5m 3-5m 3, 5m 3-5.5m 3, 5.5m 3-6m 3, 6m 3-6.5m 3, 6.5m 3-7m 3, 7m 3-7.5m 3, 7.5m 3-8m 3, 8m 3-8.5m 3, 8.5m 3-9m 3, 9m 3-9.5m 3or 9.5m 3-10m 3;
Be preferably 2.5m 3-3m 3, 3m 3-3.5m 3, 3.5m 3-4m 3, 4m 3-4.5m 3, 4.5m 3-5m 3, 5m 3-5.5m 3, 5.5m 3-6m 3, 6m 3-6.5m 3, 6.5m 3-7m 3or 7m 3-7.5m 3;
Particularly preferably: 3.5m 3-4m 3, 4m 3-4.5m 3, 4.5m 3-5m 3, 5m 3-5.5m 3, 5.5m 3-6m 3or 6m 3-6.5m 3.
Present invention also offers a kind of preparation technology subtracting shock insulation resilient sleeper-bearing, it is characterized in that, specifically comprise the steps:
Step 100, using isocyanic ester as the first potting syrup, by polyvalent alcohol, all infusion, catalyzer and pigment, and the mixture of chainextender or linking agent is as the second potting syrup;
Step 200, puts into the first potting syrup and the second potting syrup respectively to the storage vat of two on casting molding machine;
Step 300, utilizes casting molding machine the first potting syrup and the second potting syrup to be injected in mould, and curing conservation becomes to subtract shock insulation resilient sleeper-bearing;
Step 400, will subtract the anti-drying room of putting into of shock insulation resilient sleeper-bearing and carry out heat treated and get product.
What the present embodiment provided subtracts shock insulation resilient sleeper-bearing and preparation technology thereof, first prepares prepolymer, becomes the first component, is conducive to polyreaction and evenly carries out.Polyvalent alcohol and the auxiliary agent such as chainextender or linking agent become second component, by cast after casting molding machine mixing, material are fully merged.Can promote that material obtains the alloy structure of microphase-separated, improve the ageing-resistant performance and weather resistance that subtract shock insulation resilient sleeper-bearing, when using on a large scale, the homogeneity subtracting shock insulation resilient sleeper-bearing can be ensured, can be applicable to high-grade field of track traffic.
On the basis of above-described embodiment, further, step 300, utilizes casting molding machine the first potting syrup and the second potting syrup to be injected in mould, and curing conservation becomes to subtract shock insulation resilient sleeper-bearing, in, the temperature of the first potting syrup and the second potting syrup 5 DEG C-115 DEG C, pouring speed is 0.1kg/min-40kg/min, and die temperature is 20 DEG C-130 DEG C, the duration of pouring is 0.03min-60min, and the time of curing conservation is 0h-10h.
Wherein, the first potting syrup and the second potting syrup temperature range are: 5 DEG C-10 DEG C, 10 DEG C-15 DEG C, 15 DEG C-20 DEG C, 20 DEG C-25 DEG C, 25 DEG C-30 DEG C, 30 DEG C-35 DEG C, 35 DEG C-40 DEG C, 40 DEG C-45 DEG C, 45 DEG C-50 DEG C, 50 DEG C-55 DEG C, 55 DEG C-60 DEG C, 60 DEG C-65 DEG C, 65 DEG C-70 DEG C, 70 DEG C-75 DEG C, 75 DEG C-80 DEG C, 80 DEG C-85 DEG C, 85 DEG C-90 DEG C, 90 DEG C-95 DEG C, 95 DEG C-100 DEG C, 100 DEG C-105 DEG C, 105 DEG C-110 DEG C or 110 DEG C-115 DEG C;
Be preferably: 30 DEG C-35 DEG C, 35 DEG C-40 DEG C, 40 DEG C-45 DEG C, 45 DEG C-50 DEG C, 50 DEG C-55 DEG C, 55 DEG C-60 DEG C, 60 DEG C-65 DEG C, 65 DEG C-70 DEG C, 70 DEG C-75 DEG C or 75 DEG C-80 DEG C;
Particularly preferably: 40 DEG C-45 DEG C, 45 DEG C-50 DEG C, 50 DEG C-55 DEG C, 55 DEG C-60 DEG C, 60 DEG C-65 DEG C or 65 DEG C-70 DEG C.
Pouring speed scope is: 0.1kg/min-2kg/min, 2kg/min-4kg/min, 4kg/min-6kg/min, 6kg/min-8kg/min, 8kg/min-10kg/min, 10kg/min-12kg/min, 12kg/min-14kg/min, 14kg/min-16kg/min, 16kg/min-18kg/min, 18kg/min-20kg/min, 20kg/min-22kg/min, 22kg/min-24kg/min, 24kg/min-26kg/min, 26kg/min-28kg/min, 28kg/min-30kg/min, 30kg/min-32kg/min, 32kg/min-34kg/min, 34kg/min-36kg/min, 36kg/min-38kg/min or 38kg/min-40kg/min,
Be preferably: 10kg/min-12kg/min, 12kg/min-14kg/min, 14kg/min-16kg/min, 16kg/min-18kg/min, 18kg/min-20kg/min, 20kg/min-22kg/min, 22kg/min-24kg/min, 24kg/min-26kg/min, 26kg/min-28kg/min or 28kg/min-30kg/min;
Particularly preferably: 14kg/min-16kg/min, 16kg/min-18kg/min, 18kg/min-20kg/min, 20kg/min-22kg/min, 22kg/min-24kg/min or 24kg/min-26kg/min.
The scope of die temperature is: 20 DEG C-25 DEG C, 25 DEG C-30 DEG C, 30 DEG C-35 DEG C, 35 DEG C-40 DEG C, 40 DEG C-45 DEG C, 45 DEG C-50 DEG C, 50 DEG C-55 DEG C, 55 DEG C-60 DEG C, 60 DEG C-65 DEG C, 65 DEG C-70 DEG C, 70 DEG C-75 DEG C, 75 DEG C-80 DEG C, 80 DEG C-85 DEG C, 85 DEG C-90 DEG C, 90 DEG C-95 DEG C, 95 DEG C-100 DEG C, 100 DEG C-105 DEG C, 105 DEG C-110 DEG C, 110 DEG C-115 DEG C, 115 DEG C-120 DEG C, 120 DEG C-125 DEG C or 125 DEG C-130 DEG C.
The duration of pouring, scope was: 0.03min-3min, 3min-6min, 6min-9min, 9min-12min, 12min-15min, 15min-18min, 18min-21min, 21min-24min, 24min-27min, 27min-30min, 30min-33min, 33min-36min, 36min-39min, 39min-42min, 42min-45min, 45min-48min, 48min-51min, 51min-54min, 54min-57min or 57min-60min;
Be preferably: 15min-18min, 18min-21min, 21min-24min, 24min-27min, 27min-30min, 30min-33min, 33min-36min, 36min-39min, 39min-42min or 42min-45min;
Particularly preferably: 21min-24min, 24min-27min, 27min-30min, 30min-33min, 33min-36min or 36min-39min.
Molding time scope is: 0.1h-0.5h, 0.5h-1h, 1h-1.5h, 1.5h-2h, 2h-2.5h, 2.5h-3h, 3h-3.5h, 3.5h-4h, 4h-4.5h, 4.5h-5h, 5h-5.5h, 5.5h-6h, 6h-6.5h, 6.5h-7h, 7h-7.5h, 7.5h-8h, 8h-8.5h, 8.5h-9h, 9h-9.5h or 9.5h-10h;
Be preferably 2.5h-3h, 3h-3.5h, 3.5h-4h, 4h-4.5h, 4.5h-5h, 5h-5.5h, 5.5h-6h, 6h-6.5h, 6.5h-7h or 7h-7.5h;
Be particularly preferably 3.5h-4h, 4h-4.5h, 4.5h-5h, 5h-5.5h, 5.5h-6h or 6h-6.5h.
Now according to above-mentioned introduction, provide following embodiment, in following embodiment, component is weight percentage:
Embodiment 1
By hexichol methyl hydride vulcabond (TDI-80, Shanghai BASF AG) 3%, polyvalent alcohol (JLC-200 (Jing Jia Linkage (Beijing) new material technology company limited)) 60%, chainextender (MOCA, Jining Hua Kai resin company limited) 32%, foam stabilizer (AK158, the triumphant commerce and trade company limited in Jinan three) 3.5%, catalyzer (stannous octoate, Jining Heng Tai Chemical Co., Ltd.) 0.01%, pigment (carbon black TY-1, sky, Tianjin century Chemicals development in science and technology company limited) 1.49%.
Batching: prepare burden according to described composition of raw materials, wherein isocyanic ester is the first potting syrup, and all the other are the second potting syrup.Reinforced: the first potting syrup prepared and the second potting syrup to be divided and joins in casting molding machine.Start casting molding machine, setting regulates material temperature (temperature of the first potting syrup and the second potting syrup) to be 5 DEG C, and pouring speed is 0.1kg/min, and the duration of pouring is 5min.Open mould, clear up die cavity, clean out rear brushing releasing agent, close after brushing die cavity.Start mold heating system, regulate die temperature to be 20 DEG C.When material temperature, die temperature reach set(ting)value, open volume pump, the first potting syrup and the second potting syrup are divided and is transported to mixing head accurately in proportion, be poured in mould after mixing.Cast 5min, after, close sprue gate, and curing molding 10h, period maintenance.After to be solidified, open die cavity, vibration damper plate is taken out from die cavity.The vibration damper plate of taking-up is put into 100 DEG C ± 5 DEG C drying rooms, carry out 10h post curing treatment.After after fixing, grinding process is carried out to its surface, make its surfacing; Deburring process is carried out to its surrounding, makes its four limits rule.Check, be packaged to be goods.Test result is in table 1.
Embodiment 2
By isocyanate prepolymer (JLC-3, Jing Jia Linkage (Beijing) new material technology company limited) 30%, polyvalent alcohol (JLC-500 Jing Jia Linkage (Beijing) new material technology company limited) 20%, chainextender (1-4 butyleneglycol, Jining Hua Kai resin company limited) 37%, foam stabilizer (AK158, the triumphant commerce and trade company limited in Jinan three) 5%, catalyzer (A33, Jining Heng Tai Chemical Co., Ltd.) 3%, pigment (carbon black TY-1, sky, Tianjin century Chemicals development in science and technology company limited) 5%.
Batching: prepare burden according to described composition of raw materials, wherein isocyanic ester is the first potting syrup, and all the other are the second potting syrup.Reinforced: the first potting syrup prepared and the second potting syrup are joined in casting molding machine.Start casting molding machine, setting regulates material temperature to be 115 DEG C, and pouring speed is 40kg/min, and the duration of pouring is 0.03min.Open mould, clear up die cavity, clean out rear brushing releasing agent, close after brushing die cavity.Start mold heating system, regulate die temperature to be 130 DEG C.When material temperature, die temperature reach set(ting)value, open volume pump, the first potting syrup and the second potting syrup are divided and is transported to mixing head accurately in proportion, be poured in mould after mixing.Cast 5min, after, close sprue gate, and curing molding 0.1h, period maintenance.After to be solidified, open die cavity, vibration damper plate is taken out from die cavity.The vibration damper plate of taking-up is put into 100 DEG C ± 5 DEG C drying rooms, carry out 10h post curing treatment.After after fixing, grinding process is carried out to its surface, make its surfacing; Deburring process is carried out to its surrounding, makes its four limits rule.Check, be packaged to be goods.Test result is in table 1.
Embodiment 3
By liquefied mdi (MDI-103C, Shanghai BASF) 30%, polyvalent alcohol (TMP330M, Tianjin the 3rd petrochemical complex company limited) 60%, chainextender (triethylene diamine, Jining Hua Kai resin company limited) 5%, foam stabilizer (BD-3088, Hangzhou Bao Er get organosilicon company limited) 2.99%, catalyzer (stannous octoate, Jining Heng Tai Chemical Co., Ltd.) 2%, pigment (carbon black TY-1, sky, Tianjin century Chemicals development in science and technology company limited) 0.01%.
Batching: prepare burden according to described composition of raw materials, wherein isocyanic ester is the first potting syrup, and all the other are the second potting syrup.Reinforced: the A prepared, B component are joined in casting molding machine.Start casting molding machine, regulate material temperature to be 80 DEG C, pouring speed is 20kg/min, and the duration of pouring is 60min.Open mould, clear up die cavity, clean out rear brushing releasing agent, close after brushing die cavity.Start mold heating system, regulate die temperature to be 80 DEG C.When material temperature, die temperature reach set(ting)value, open volume pump, the first potting syrup and the second potting syrup are divided and is transported to mixing head accurately in proportion, be poured in mould after mixing.Cast 60min, after, close sprue gate, and curing molding 8h, period maintenance.After to be solidified, open die cavity, vibration damper plate is taken out from die cavity.The vibration damper plate of taking-up is put into 100 DEG C ± 5 DEG C drying rooms, carry out 10h post curing treatment.After after fixing, grinding process is carried out to its surface, make its surfacing; Deburring process is carried out to its surrounding, makes its four limits rule.Check, be packaged to be goods.Test result is in table 1.
Embodiment 4
By modification MDI (MDI-30, Jing Jia Linkage (Beijing) new material technology company limited) 25%, polyvalent alcohol (DDL-2000, Shandong Lanxing Dongda Chemical Co., Ltd) 50%, chainextender (MOCA, Jining Hua Kai resin company limited) 20%, foam stabilizer (BD-3088 Hangzhou Bao Er get organosilicon company limited) 0.5%, (isocaprylic acid is plumbous for catalyzer, Jining Heng Tai Chemical Co., Ltd.) 2%, pigment (carbon black TY-1, sky, Tianjin century Chemicals development in science and technology company limited) 2.5%.
Batching: prepare burden according to described composition of raw materials, wherein isocyanic ester is the first potting syrup, and all the other are the second potting syrup.Reinforced: the first potting syrup prepared and the second potting syrup are joined in casting molding machine.Start casting molding machine, setting regulates material temperature to be 70 DEG C, and pouring speed is 15kg/min, and the duration of pouring is 30min.Open mould, clear up die cavity, clean out rear brushing releasing agent, close after brushing die cavity.Start mold heating system, regulate die temperature to be 80 DEG C.When material temperature, die temperature reach set(ting)value, open volume pump, the first potting syrup and the second potting syrup are transported to mixing head in proportion accurately, are poured in mould after mixing.Cast 30min, after, close sprue gate, and curing molding 5h, period maintenance.After to be solidified, open die cavity, vibration damper plate is taken out from die cavity.The vibration damper plate of taking-up is put into 100 DEG C ± 5 DEG C drying rooms, carry out 10h post curing treatment.After after fixing, grinding process is carried out to its surface, make its surfacing; Deburring process is carried out to its surrounding, makes its four limits rule.Check, be packaged to be goods.Test result is in table 1.
Embodiment 5
By hexichol methyl hydride vulcabond (TDI-80, Shanghai BASF AG) 20%, polyvalent alcohol (TMP330M, Tianjin the 3rd petrochemical complex company limited)) 50%, chainextender (MOCA, Jining Hua Kai resin company limited) 25%, foam stabilizer (AK158, the triumphant commerce and trade company limited in Jinan three) 2%, (isocaprylic acid is plumbous for catalyzer, Jining Heng Tai Chemical Co., Ltd.) 2%, pigment (carbon black TY-1, sky, Tianjin century Chemicals development in science and technology company limited) 1%.Batching: prepare burden according to described composition of raw materials, wherein isocyanic ester is the first potting syrup, and all the other are the second potting syrup.Reinforced: the first potting syrup prepared and the second potting syrup are joined in casting molding machine.Start casting molding machine, setting regulates material temperature to be 70 DEG C, and pouring speed is 18kg/min, and the duration of pouring is 20min.Open mould, clear up die cavity, clean out rear brushing releasing agent, close after brushing die cavity.Start mold heating system, regulate die temperature to be 75 DEG C.When material temperature, die temperature reach set(ting)value, open volume pump, A, B component are transported to mixing head in proportion accurately, are poured in mould after mixing.Cast 20min, after, close sprue gate, and curing molding 2h, period maintenance.After to be solidified, open die cavity, vibration damper plate is taken out from die cavity.The vibration damper plate of taking-up is put into 100 DEG C ± 5 DEG C drying rooms, carry out 10h post curing treatment.After after fixing, grinding process is carried out to its surface, make its surfacing; Deburring process is carried out to its surrounding, makes its four limits rule.Check, be packaged to be goods.Test result is in table 1.
Embodiment 6
By 4,4-diphenylmethanediisocyanate (MDI-100 Yantai Wanhua Polyurethane Co., Ltd.) 25%, polyvalent alcohol (DDL-2000, Shandong Lanxing Dongda Chemical Co., Ltd)) 45%, chainextender (MOCA, Jining Hua Kai resin company limited) 25%, foam stabilizer (the triumphant commerce and trade company limited in AK158 Jinan three) 2%, catalyzer (isocaprylic acid plumbous, Jining Heng Tai Chemical Co., Ltd.) 1%, pigment (sky, carbon black TY-1 Tianjin century Chemicals development in science and technology company limited) 2%.
Batching: prepare burden according to described composition of raw materials, wherein isocyanic ester is the first potting syrup, and all the other are the second potting syrup.Reinforced: the first potting syrup prepared and the second potting syrup are joined in casting molding machine.Start casting molding machine, regulate material temperature to be 45 DEG C, pouring speed is 35kg/min, and the duration of pouring is 18min.Open mould, clear up die cavity, clean out rear brushing releasing agent, close after brushing die cavity.Start mold heating system, regulate die temperature to be 48 DEG C.When material temperature, die temperature reach set(ting)value, open volume pump, A, B component are transported to mixing head in proportion accurately, are poured in mould after mixing.Cast 18min, after, close sprue gate, and curing molding 6h, period maintenance.After to be solidified, open die cavity, vibration damper plate is taken out from die cavity.The vibration damper plate of taking-up is put into 100 DEG C ± 5 DEG C drying rooms, carry out 10h post curing treatment.After after fixing, grinding process is carried out to its surface, make its surfacing; Deburring process is carried out to its surrounding, makes its four limits rule.Check, be packaged to be goods.Test result is in table 1.
Table 1 detected result
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (10)

1. subtract a shock insulation resilient sleeper-bearing, it is characterized in that, comprise isocyanic ester and polyvalent alcohol, and chainextender or linking agent; By weight percentage, polyvalent alcohol described in the described isocyanic ester containing 3%-30% and 20%-60%, and the described chainextender of 2%-35% or described linking agent.
2. according to claim 1ly subtract shock insulation resilient sleeper-bearing, it is characterized in that, also comprise equal infusion; The weight percent of described equal infusion is 0.5%-5%.
3. according to claim 2ly subtract shock insulation resilient sleeper-bearing, it is characterized in that, also comprise catalyzer; The weight percent of described catalyzer is 0.01%-3%.
4. according to claim 3ly subtract shock insulation resilient sleeper-bearing, it is characterized in that, also comprise pigment; The weight percent of described pigment is 0.01%-5%.
5. according to claim 2ly subtract shock insulation resilient sleeper-bearing, it is characterized in that, described equal infusion is silicoorganic compound.
6. according to claim 3ly subtract shock insulation resilient sleeper-bearing, it is characterized in that, described catalyzer is metallic salt.
7. according to any one of claim 1-6, subtract shock insulation resilient sleeper-bearing, it is characterized in that, isocyanate group (NCO) the content 3%-50% of described isocyanic ester, the hydroxyl value of described polyvalent alcohol is 5mgKOH/g-500mgKOH/g, and the functionality of described chainextender or described linking agent is 2-8.
8. according to any one of claim 1-6, subtract shock insulation resilient sleeper-bearing, it is characterized in that, this volume subtracting shock insulation resilient sleeper-bearing is 0.001m 3-10m 3.
9. subtract a preparation technology for shock insulation resilient sleeper-bearing, it is characterized in that, specifically comprise the steps:
Using isocyanic ester as the first potting syrup, by polyvalent alcohol, all infusion, catalyzer and pigment, and the mixture of chainextender or linking agent is as the second potting syrup;
First potting syrup and the second potting syrup are put into respectively to the storage vat of two on casting molding machine;
Utilize casting molding machine the first potting syrup and the second potting syrup to be injected in mould, and curing conservation become to subtract shock insulation resilient sleeper-bearing;
The described shock insulation resilient sleeper-bearing protection drying room that subtracts is carried out heat treated and gets product.
10. the preparation technology subtracting shock insulation resilient sleeper-bearing according to claim 9, it is characterized in that, first potting syrup and the second potting syrup are injected in mould by the described casting molding machine that utilizes, and curing conservation becomes to subtract in the step of shock insulation resilient sleeper-bearing, the temperature of described first potting syrup and described second potting syrup 5 DEG C-115 DEG C, pouring speed is 0.1kg/min-40kg/min, and die temperature is 20 DEG C-130 DEG C, the duration of pouring is 0.03min-60min, and the time of curing conservation is 0.1h-10h.
CN201510789260.6A 2015-11-17 2015-11-17 Elastic pad plate capable of reducing and isolating vibration and preparation technology thereof Pending CN105348471A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561114A (en) * 2010-12-16 2012-07-11 拜耳材料科技(中国)有限公司 Polyurethane railway track bed and its production method and application
CN103059259A (en) * 2013-01-21 2013-04-24 泉州市西特吉新材料有限公司 Polyurethane micropore elastic rail pad and preparation method thereof
CN104592744A (en) * 2015-02-03 2015-05-06 东莞市鹏博盛实业有限公司 Damping cushion block for high-speed railway and production method of damping cushion block

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102561114A (en) * 2010-12-16 2012-07-11 拜耳材料科技(中国)有限公司 Polyurethane railway track bed and its production method and application
CN103059259A (en) * 2013-01-21 2013-04-24 泉州市西特吉新材料有限公司 Polyurethane micropore elastic rail pad and preparation method thereof
CN104592744A (en) * 2015-02-03 2015-05-06 东莞市鹏博盛实业有限公司 Damping cushion block for high-speed railway and production method of damping cushion block

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Application publication date: 20160224