Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF5 Cites 1 Cited by
  • 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 maintenance workload and maintenance cost of public works, which will lead to an increase in the overall cost of maintenance.
[0004] However, most of the existing under-rail pads or under-rail pads on the market are made of conventional rubber materials, which are greatly affected by temperature, have poor protection effects on sleepers, and have poor mechanical properties, resulting in short service life.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0058] Add 8g of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane dropwise to 8.3g of p-phenylene diisocyanate in toluene / ethyl acetate (100ml, volume ratio=4:1) solution; Mechanically stir the reaction at room temperature for 1.5h, then add 141g polypropylene malonate, 0.45g stannous octoate, heat to 70~72°C and stir the reaction at this temperature for 8h, rotary steam, remove the toluene / ethyl acetate solvent, and prepare Obtain a prepolymer; disperse 10g of nano-silica in 100g of toluene, and ultrasonically 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 and 90 g of toluene were mixed, stirred and reacted at 80° C. for 3.5 h, and rotated to evaporate to remove the toluene and water to prepare the polyester polyol / nano-silicon dioxide hybrid material.

[0059] II. Preparation of Elastomers

[0060] Take 36g of p...

Embodiment 2

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

[0064] Add 8.2g of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane dropwise to 9g of p-phenylene diisocyanate in toluene / ethyl acetate (110ml, volume ratio=4:1) solution; Mechanically stir the reaction at room temperature for 2 hours, then add 150g polybutylene adipate, 0.6g dibutyltin dilaurate, heat to 75~80°C and stir the reaction at this temperature for 8.5 hours, rotary steam to remove toluene / ethyl acetate solvent to obtain a prepolymer; disperse 10g nano silicon dioxide in 100g toluene, and ultrasonically 30min to obtain a nano silicon dioxide dispersion; then, take 23g prepolymer and mix it with 16g of the nano The silicon oxide dispersion, 4 g of water and 100 g of toluene were mixed, stirred and reacted at 85° C. for 3.5 h, and rotated to evaporate to remove the toluene and water, so as to obtain the polyester polyol / nano-silicon dioxide hybrid material.

[0065] II. Preparation of Elastomers...

Embodiment 3

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

[0070] Add 8.6g of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane dropwise to 10.9g of p-phenylene diisocyanate in toluene / ethyl acetate (120ml, volume ratio=4:1) solution; Mechanically stir the reaction at room temperature for 2.5h, then add 166.4g polybutylene succinate, 0.72g dibutyltin dilaurate, heat to 82~85°C and stir the reaction at this temperature for 8h, rotary steaming, Remove the toluene / ethyl acetate solvent 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 30g of the prepolymer and mix it with 19g of the The nano-silica dispersion liquid, 4g of water and 115g of toluene were mixed, stirred and reacted at 80°C for 5h, and then rotary-evaporated to remove the toluene and water to prepare the polyester polyol / nano-silica hybrid material.

[0071] II. Preparation of Elastomers

[0072] Take 56.3...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com