Elastomer for railway cushion block of rail transit and preparation method thereof

A rail transit and elastomer technology, applied in the field of rail transit polymer materials, can solve the problems of poor mechanical properties, shortened service life, short service life, etc., and achieve the effect of being conducive to uniform dispersion, overall performance improvement, and broad application prospects.

Active Publication Date: 2019-11-01
上海鑫普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is worth noting that the rubber material corresponds to the use of different rail transit conditions. In general urban rail transit, rubber backing plates can be used for passenger transportation with light axle loads. However, with the rapid development of domestic rail transit, rubber backing plates can no longer meet the requirements. The shortening of the service cycle will increase the m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0056] Example 1

[0057] I. Preparation of polyester polyol / nano-silica hybrid material

[0058] Add 8g N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane dropwise to 8.3g p-phenylene diisocyanate in toluene / ethyl acetate (100ml, volume ratio=4:1) solution; The reaction was mechanically stirred for 1.5 hours at room temperature, then 141g of polypropylene glycol malonate and 0.45g of stannous octoate were added, heated to 70~72°C and stirred at this temperature for 8 hours, rotary evaporated, and the toluene / ethyl acetate solvent was removed. To obtain a prepolymer; disperse 10g of nano-silica in 100g of toluene and ultrasonicate for 30min to obtain a nano-silica dispersion; then, take 15.2g of the prepolymer and mix it with 12g of the nano-silica dispersion, 2g Water is mixed with 90 g of toluene, stirred at 80° C. for 3.5 hours, and rotary steamed to remove toluene and water to prepare the polyester polyol / nano-silica hybrid material.

[0059] II. Preparation of elastomer

[0060] T...

Example Embodiment

[0062] Example 2

[0063] I. Preparation of polyester polyol / nano-silica hybrid material

[0064] Add 8.2g N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane dropwise to 9g p-phenylene diisocyanate in toluene / ethyl acetate (110ml, volume ratio=4:1) solution; The reaction was mechanically stirred at room temperature for 2h, then 150g polybutylene adipate and 0.6g dibutyltin dilaurate were added, heated to 75~80℃ and stirred at this temperature for 8.5h, rotary evaporated to remove toluene / Ethyl acetate solvent to prepare a prepolymer; disperse 10g of nano-silica in 100g of toluene and ultrasonicate for 30min to obtain a nano-silica dispersion; then, take 23g of the prepolymer and mix it with 16g of the nano The silica dispersion liquid, 4 g of water and 100 g of toluene were mixed, stirred and reacted at 85° C. for 3.5 hours, and rotary steamed to remove the toluene and water to prepare the polyester polyol / nano-silica hybrid material.

[0065] II. Preparation of elastomer

[0066] Tak...

Example Embodiment

[0068] Example 3

[0069] I. Preparation of polyester polyol / nano-silica hybrid material

[0070] Add 8.6g N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane dropwise to 10.9g p-phenylene diisocyanate in toluene / ethyl acetate (120ml, volume ratio=4:1) solution; The reaction was mechanically stirred at room temperature for 2.5 hours, and then 166.4g polybutylene succinate and 0.72g dibutyltin dilaurate were added, heated to 82~85℃ and stirred at this temperature for 8 hours, and then steamed. The toluene / ethyl acetate solvent was removed to prepare a prepolymer; 10g of nano-silica was dispersed in 100g of toluene and sonicated for 30 minutes to obtain a nano-silica dispersion; then, 30g of the prepolymer was taken and combined with 19g of the The nano-silica dispersion liquid, 4 g of water and 115 g of toluene are mixed, stirred at 80° C. for 5 hours, and rotary steamed to remove toluene and water to prepare the polyester polyol / nano-silica hybrid material.

[0071] II. Preparation of ...

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PUM

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Abstract

The invention discloses an elastomer of a rail cushion block for rail transit. The elastomer is composed of the following components in parts by mass: 35-98 parts of polyester polyol/nano silicon dioxide hybrid material, 24-59 parts of isophorone diisocyanate, 105-127 parts of polyether polyol, 3-8 parts of 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane, 32-48 parts of octamethylcyclotetrasiloxane, 0.03-0.05 part of tetramethylammonium hydroxide and 25-30 parts of a curing agent. The overall performance of the elastomer is obviously improved, and the elastomer can be used as a rail cushion block for rail transit. The preparation method of the elastomer is simple to operate and suitable for large-scale industrial production, thereby having a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of rail transit polymer materials, and in particular relates to an elastic body used for rail transit under-rail pads and a preparation method thereof, and also relates to a production method of rail transit under-rail pads. Background technique [0002] In sleeper structures such as railways, high-speed railways, and urban sleeper traffic, it is generally necessary to use elastic backing plates between sleepers (such as steel rails or rails) and sleepers to absorb the vibration energy generated when vehicles pass by and reduce the noise caused by vibration. Pollution, and to a certain extent, protect sleepers. [0003] It is worth noting that the rubber material corresponds to the use of different rail transit conditions. In general urban rail transit, rubber backing plates can be used for passenger transportation with light axle loads. However, with the rapid development of domestic rail transit, rubber ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08K3/36
CPCC08G18/4238C08G18/4825C08G18/4829C08G18/4854C08G18/4018C08G18/3893C08G18/6618C08K3/36C08K2201/011
Inventor 韩亮杨科朱鼎李薇
Owner 上海鑫普新材料有限公司
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