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Anti-vibration and anti-corrosion polyurethane grouting composite material, preparation method and application

A technology of combining materials and polyurethane, applied in the field of polyurethane materials, can solve problems such as high price, and achieve the effects of reducing investment, convenient construction and reducing wave grinding

Active Publication Date: 2020-11-20
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, domestic companies are still unable to manufacture polyurethane elastomer grouting materials for vibration and noise reduction of track lines. The existing tracks are mainly imported from Germany, and the price is very expensive. Related domestic companies have not yet developed similar products.

Method used

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  • Anti-vibration and anti-corrosion polyurethane grouting composite material, preparation method and application
  • Anti-vibration and anti-corrosion polyurethane grouting composite material, preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0041] Preparation of component A: weigh polyether polyol, chain extender, antioxidant, leveling agent, glass beads and color paste into the reaction kettle, stir and heat. Vacuum dehydration and degassing under MPa conditions for 45 minutes, lower the temperature to 60-80°C, add amine catalysts and organic tin catalysts, continue to stir and vacuumize for 20-30 minutes, and control the water content of the mixture to less than 0.05%, stop heating and stirring, and start filling.

[0042] Preparation of component B: Weigh the isocyanate and polyol into the reaction kettle, stir and heat, react at 80-90°C for 3-4h, stop heating and stirring and start filling.

Embodiment 1

[0045] Component A: two kinds of polyoxypropylene with a number average molecular weight of 4000-6000 and a functionality of 3 Triol: 75%, chain extender 1,3-propanediol: 8%, chain extender 4,4ˊ-methylene Bis(2,6-diisopropylaniline): 5%, antioxidant 1010: 1%, amine catalyst triethylenediamine: 0.02%, organotin catalyst dibutyltin dilaurate: 0.01%, glass beads : 10%, modified polysiloxane leveling agent: 0.5%, color paste: 0.47%;

[0046] Component B: diphenylmethane diisocyanate: 40%, two polyoxypropylene diols with a number average molecular weight of 1000-2000 and a functionality of 2: 60%.

[0047] When in use, component A and component B are mixed and stirred evenly at 25-40°C according to the weight ratio of 1:0.7, then poured directly on the corresponding part of the track foundation, and cured at room temperature for 2 hours to form.

Embodiment 2

[0053] Component A: two kinds of polyoxypropylene with a number average molecular weight of 4000-6000 and a functionality of 3 Triol: 85%, chain extender 1,3-propanediol: 4%, chain extender 4,4ˊ-methylene Bis(2,6-diisopropylaniline): 4%, antioxidant 1010: 1%, amine catalyst triethylenediamine: 0.05%, organotin catalyst dibutyltin dilaurate: 0.02%, glass beads : 5%, modified polysiloxane leveling agent: 0.5%, color paste: 0.43%;

[0054] Component B: diphenylmethane diisocyanate: 30%, two polyoxypropylene diols with a number average molecular weight of 1000-2000 and a functionality of 2: 70%.

[0055] When in use, component A and component B are mixed and stirred evenly at 25-40°C according to the weight ratio of 1:0.6, then directly poured on the corresponding part of the track foundation, and cured at room temperature for 2 hours to form.

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Abstract

The invention provides a polyurethane grouting combined material with vibration damping and corrosion resistance, a preparation method and an application thereof, and belongs to the field of polyurethane materials. The polyurethane grouting combined material can replace prior rail fastening systems, and provides a material with excellent elastic performance for rails, which can replace prior steel rail damping materials and adsorb vibration noise of steel rails. The polyurethane grouting combined material with vibration damping and corrosion resistance comprises a polyurethane main material, the polyurethane main material is prepared by mixing a component A and a component B, wherein the component A is prepared by the following materials: 70-90% of polyether polyol, 5-13% of a chain extender, 0.5-1% of an anti-oxidant, 0.02-0.1% of an amine catalyst, 0.01-0.05% of an organic tin catalyst, 5-10% of glass beads, 0.5-1% of a levelling agent, and 0.1-0.5% of color paste. the materials are uniformly mixed at 100-120 DEG C, the water content in the mixture is below 0.05%, and the component A is obtained; the component B is obtained by a reaction of 30-60% of isocyanate and 40-70% of polyol at 80-90 DEG C for 3-4 hours.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to a vibration-damping and anti-corrosion polyurethane grouting composite material, a preparation method and an application. Background technique [0002] Traditional rail line vibration reduction types mostly use fastener systems to fix and support the railway track, and the polymer backing plate of the fastener system provides elasticity to play a role in vibration reduction. At the same time, in order to reduce the noise generated by the vibration of the rail waist when the train passes, some urban rail transit lines absorb vibration and noise by bonding (or mechanically fixing) damping materials at the rail waist. [0003] Polyurethane material is a linear or cross-linked polymer composed of polyol as soft segment, isocyanate and chain extender as hard segment, which contains a large number of carbamate groups and has a block structure with alternating soft and hard segment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08L75/08C08L83/04C08K5/134C08K7/20
CPCC08G18/3206C08G18/3243C08G18/4812C08G18/6685C08L75/08C08L83/04C08K5/1345C08K7/20
Inventor 郑晖姜凌王黎明
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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