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High speed railway ballast glue and preparation method and application method thereof

A technology of high-speed railway and ballast glue, which is applied in the field of mechanical materials, can solve the problems of potential safety hazards at stations and along railway lines, affecting the safety of trains, flying ballast and other problems, and achieves convenient construction, good bonding effect, and excellent weather resistance Effect

Active Publication Date: 2012-10-03
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When a high-speed railway train runs at a speed of more than 300 km / h, the train wind may lift up the ballast beside the ballasted track, forming ballast flying, causing damage to the high-speed train and seriously affecting the safety of the train. , at the same time, the ballast is scattered, which brings great safety hazards to the station and along the railway

Method used

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  • High speed railway ballast glue and preparation method and application method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the interlayer reactor, first add 60% of Mn=400-2000 low-unsaturation low-molecular-weight polyether polyol, 32% of Mn=400-2000 low-unsaturation high-molecular-weight polyether polyol, at temperature 105-110°C, dehydration under the condition of -0.1MPa vacuum for 2-3 hours, lower the temperature to 60°C, add 3% pigment, 4% small molecule chain extender, 1% auxiliary agent, keep the temperature constant Stir at low speed for 2 hours, then grind three times, cool down to below 50°C, discharge, filter and package to obtain component A.

[0030] In the interlayer reaction kettle, first add 10% of low unsaturation high molecular weight polyether polyol with Mn=400-2000, 30% of plasticizer, at a temperature of 105-110°C and a vacuum of -0.1MPa Dehydrate under conditions for 2-3 hours, cool down to 60°C, add 75% isocyanate, raise the temperature to 70-80°C, keep the temperature constant, react for 1-2 hours, cool down to below 50°C, discharge, filter, and fill with nitroge...

Embodiment 2

[0032] In the interlayer reactor, first add 40% of low-unsaturation low-molecular-weight polyether polyols with Mn=400-2000, 20% of low-unsaturation low-molecular-weight polyether polyols with Mn=400-2000, 32% Mn = 400 ~ 2000 low unsaturation high molecular weight polyether polyol, at a temperature of 105 ~ 110 ° C, vacuum -0.1MPa under the condition of dehydration for 2 ~ 3 hours, cooling to 60 ° C, adding 3% Pigment, 2% small molecule chain extender, 1% additive, keep the temperature constant, stir at low speed for 2 hours, then grind three times, cool down to below 50°C, discharge, filter and package to obtain component A.

[0033] In the interlayer reactor, first add 15% of Mn=400~2000 low unsaturation high molecular weight polyether polyol, 10% of Mn=400~2000 low unsaturation high molecular weight polyether polyol, at temperature Dehydration at 105-110°C and vacuum degree of -0.1MPa for 2-3 hours, lower the temperature to 60°C, add 75% isocyanate, raise the temperature to...

Embodiment 3

[0035] In the interlayer reactor, first add 40% of low-unsaturation low-molecular-weight polyether polyols with Mn=400-2000, 20% of low-unsaturation low-molecular-weight polyether polyols with Mn=400-2000, 32% Mn = 400 ~ 2000 low unsaturation high molecular weight polyether polyol, at a temperature of 105 ~ 110 ° C, vacuum -0.1MPa under the condition of dehydration for 2 ~ 3 hours, cooling to 60 ° C, adding 3% Pigment, 2% small molecule chain extender, 1% auxiliary, keep the temperature constant, stir at low speed for 2 hours, then grind three times, cool down to below 50°C, discharge, filter and pack to obtain component A.

[0036] In the interlayer reactor, first add 15% of low unsaturation high molecular weight polyether polyol with Mn=400-2000, 10% of plasticizer, at a temperature of 105-110°C and a vacuum of -0.1MPa Dehydrate under conditions for 2-3 hours, cool down to 60°C, add 75% isocyanate, raise the temperature to 70-80°C, keep the temperature constant, react for 1-...

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Abstract

The invention discloses high speed railway ballast glue which is high-performance bi-component polyurethane adhesive composed of polyether polyol, isocyanate, prepolymer, catalyst, pigment and other high-performance auxiliaries. A component A is mixture made by well mixing 40-90% of the polyether polyol, 2-10% of small molecular chain extender, 0-10% of the pigment, and 0-10% of the auxiliaries. A component B is synthetic polyurethane prepolymer made of 65-85% of polyisocyanate, 5-20% of plasticizer, and 5-30% of the polyether polyol. The high speed railway ballast glue has the advantages of high firming strength, effectiveness in adhesion, convenience for construction and the like. The high speed railway ballast glue has fine adhering effect for ballast without using any prime coat. The high speed railway ballast glue is low in viscosity and high in permeability, has adjustable reaction time, is high in mechanical property and elasticity, emits no toxic and irritating gases, and has high weatherability.

Description

technical field [0001] The invention relates to ballast glue for high-speed railways, belonging to the field of mechanical materials. technical background [0002] When a high-speed railway train runs at a speed of more than 300 km / h, the train wind may lift up the ballast beside the ballasted track, forming ballast flying, causing damage to the high-speed train and seriously affecting the safety of the train. , At the same time, the ballast is scattered, which brings great potential safety hazards to the station and along the railway. [0003] Due to design requirements in our country, ballastless track and ballasted track are often required to coexist in track design, but there is a considerable difference in stiffness between ballastless track and ballasted track, and the transformation of stiffness must be completed uniformly with the help of a transition section In order to avoid affecting the driving comfort and increasing maintenance and maintenance costs. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/06C09J11/04E01B1/00
Inventor 伊善科李红英
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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