Microporous polyurethane elastomer shock absorption element for high-speed railway and preparation method thereof

A polyurethane elastomer and shock-absorbing element technology, applied in roads, tracks, buildings, etc., can solve problems such as poor water resistance, high foaming cost, and increased weight of elastomers, so as to overcome self-aggregation and facilitate uniform dispersion Effect

Inactive Publication Date: 2011-01-19
ANHUI UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN101486834A uses organic montmorillonite to strengthen polyurethane microcellular elastomer, and the effect is more obvious, but it has adopted 1,1-dichloro-1-fluoroethane (F-141b) as physical foaming agent, this hair The foaming agent has a destructive effect on the ozone layer, so it should not be used
Chinese patent CN1185501A uses 10% to 60% of ordinary mineral clay to reinforce polyurethane elastomer sleeper backing plates for railways. The weight of the elastomer increases a lot, and it adopts a one-step pouring and curing process, and then granulates and then extruded. The disadvantage of this method is that the soft and hard segments and clay are easy to be unevenly distributed, resulting in defects in the elastic body, and the backing plate is solid, so the shock absorption effect is poor
Chinese patent CN100513451C uses inert gas to fill the composition containing prepolymer, pol

Method used

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  • Microporous polyurethane elastomer shock absorption element for high-speed railway and preparation method thereof
  • Microporous polyurethane elastomer shock absorption element for high-speed railway and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] (1) Mixture (I) includes the following raw materials:

[0028] 23 parts of polytetrahydrofuran ether polyol,

[0029] 4.5 parts of ethylene glycol,

[0030] 2.8 parts of 3,3'-dichloro-4,4'-diaminodiphenylmethane,

[0031] 0.3 part water,

[0032] Silicone oil 0.3 part,

[0033] Triethylenediamine / stannous octoate 0.15 / 0.05 part;

[0034] (2) Semi-prepolymer (II) includes the following raw materials:

[0035] 2.5 parts of organic nano-kaolin,

[0036] 26.4 parts of polytetrahydrofuran ether glycol (dehydrated),

[0037] 40 parts of diphenylmethane diisocyanate.

[0038] (3) The specific preparation method is as follows:

[0039] (1) Mixture (I): 23 parts of polytetrahydrofuran ether polyol (functionality of 3, average molecular weight of 3000, without dehydration treatment), 4.5 parts of ethylene glycol, 2.8 parts of 3,3'-dichloro-4, The composition of 4'-diaminodiphenylmethane, 0.3 parts of water, 0.3 parts of silicone oil, 0.15 parts of 33% t...

Example Embodiment

[0042] Example 2

[0043] (1) Mixture (I) includes the following raw materials:

[0044] 30 parts of polypropylene glycol-glycerol ether,

[0045] 5 parts of propylene glycol,

[0046] 2 parts of dimethylthiotoluenediamine,

[0047] 0.2 part water,

[0048] Silicone oil 0.2 part,

[0049] Triethylenediamine / dibutyltin dilaurate 0.17 / 0.08 part;

[0050] (2) Semi-prepolymer (II) includes the following raw materials:

[0051] Nano Kaolin 3.5 parts,

[0052] 24 parts of polypropylene glycol (dehydrated),

[0053] 35 parts of diphenylmethane diisocyanate.

[0054] (3) The specific preparation method is as follows:

[0055] (1) Mixture (I): 30 parts of polypropylene glycol-glycerol ether (functionality of 3, average molecular weight of 4000, without dehydration treatment), 5 parts of propylene glycol, 2 parts of dimethylthiotoluenediamine, 0.2 part of water, 0.2 part of silicone oil, 0.17 part of 33% triethylenediamine solution and 0.08 part of dibutyltin dilaurate and oth...

Example Embodiment

[0058] Example 3

[0059] (1) Mixture (I) includes the following raw materials:

[0060] 40 parts of polytetrahydrofuran ether polyol,

[0061] 3.5 parts of 1,4-butanediol,

[0062] 1.5 parts of dimethylthiochlorophenylenediamine,

[0063] 0.4 part water,

[0064] Silicone oil 0.35 parts,

[0065] Triethylenediamine / dibutyltin dilaurate 0.23 / 0.07 part;

[0066] (2) Semi-prepolymer (II) includes the following raw materials:

[0067] 6 parts of organic nano-kaolin,

[0068] 17.95 parts of polytetrahydrofuran ether glycol (dehydrated),

[0069] 30 parts of liquefied diphenylmethane diisocyanate.

[0070] (3) The specific preparation method is the same as that in Example 2.

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Abstract

The invention discloses a microporous polyurethane elastomer shock absorption element for a high-speed railway. The shock absorption element is characterized by being prepared by stirring and mixing a mixture I and a quasi-prepolymer II at the temperature of between 35 and 55 DEG C for 2 to 5 minutes to obtain a mixture, wherein the mixture I consists of the following components in part by weight: 23 to 40 parts of polyether polyol A, 5 to 10 parts of chain extender, 0.1 to 0.5 part of water, 0.2 to 0.55 part of silicone oil foam homogenizing agent and 0.15 to 0.3 part of catalyst, and the quasi-prepolymer II is prepared by reacting 2.5 to 8 parts of modified nanokaolin, 24 to 30 parts of polyether glycol and 30 to 40 parts of polyisocyanate; pouring the mixture into a die which is pre-heated to 45 to 70 DEG C and is coated with a de-molding agent for molding, de-molding, and curing at the temperature of between 80 and 100 DEG C for 10 to 20 hours. The indexes of the shock absorption element meet the requirements of the HE/3328-2006 standard.

Description

1. Technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a microporous polyurethane elastomer damping element for high-speed railways and a preparation method thereof. 2. Background technology [0002] Microcellular polyurethane elastomer is a new type of material between foam and elastomer. The density is between foam and solid core materials. The pore size of the cells is 0.1-10 μm. The pore size distribution is relatively uniform, taking into account the light weight of the foam. , good impact resistance, good energy absorption, cushioning performance, high strength of elastomer, good wear resistance, good mechanical properties of elastomer and comfort of foam, light unit weight, wear resistance, oil resistance It has the characteristics of smooth transmission of vibration damping compression stress, excellent mechanical properties of fatigue resistance and so on. Microporous polyurethane elastome...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08K9/04C08K3/34C08G18/66C08G18/48C08G18/10C08J9/12B29C39/02E01B9/68
Inventor 杨建军吴庆云江文才张建安吴明元吴潮孙家干
Owner ANHUI UNIVERSITY
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