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Polyurethane resin composition, preparation method and application thereof

A technology of polyurethane resin and composition, applied in the direction of track, track maintenance, ballast layer, etc., can solve the problems of easy settlement, poor water resistance and aging resistance, poor low temperature resistance, etc., to improve water resistance and aging resistance characteristics, meet the requirements of long life, and improve the effect of low temperature resistance

Inactive Publication Date: 2010-06-16
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under field construction conditions, the heating pouring curing process cannot be used but can only be cured at room temperature, which greatly limits the selection range of the formula system
At present, although there are polyurethane castable products cured at room temperature, they are mainly used in other fields such as indoor pouring and electronic and electrical products, and there is no formula system specially designed for high-speed railway field construction site conditions
[0007] In summary, the polyurethane resin materials currently used have the following disadvantages: poor water resistance and aging resistance, which cannot meet the requirements for long service life of high-speed railway construction; poor low temperature resistance, which cannot meet the requirements for use in severe cold areas; A lot of fillers are added, which is prone to sedimentation during storage, which seriously affects the stirring process during use; the viscosity and reaction speed of the mixture used on site are greatly affected by the ambient temperature, and the viscosity and reaction speed of the mixture cannot be adjusted, and cannot adapt to extreme temperatures. construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Suitable for routine patching

[0035] Production:

[0036] Component A: 45 parts of polymer diol POP05 / 45 (Tianjin Sanpec, hydroxyl value 20.5mgKOH), 20 parts of hydroxyl-terminated polybutadiene (hydroxyl value 1.03mmolKOH), crosslinking agent GR405 (Shanghai Gaoqiao Petrochemical) 15 parts, 20 parts of dibutyl phthalate, 50 parts of silicon micropowder, 2 parts of anti-settling agent fumed silica, 0.3 parts of defoamer BYK-066N (produced by German BYK company), 1 part of antioxidant 1010 , 1 part of ultraviolet absorber UV-327, 0.03 part of catalyst dibutyltin dilaurate, 1.8 parts of coupling agent, use colloid mill to disperse filler, use anchor stirring equipment in the reactor, speed 100 rpm, temperature 110 ℃, Vacuum degree -0.09MPa, heating and vacuuming time is 4 hours. Cool to 60°C, pack and store.

[0037] Component B: PM-200 (produced by Yantai Wanhua), directly packaged in proportion.

[0038] construction:

[0039] 1. Use a brush and comp...

Embodiment 2

[0046] Example 2: Suitable for low temperature repair

[0047] Production:

[0048] Component A: 50 parts of hydroxyl-terminated polybutadiene (hydroxyl value 1.03mmolKOH), 20 parts of crosslinking agent GR405 (Shanghai Gaoqiao Petrochemical), 30 parts of dioctyl sebacate, 40 parts of clay, anti-settling agent gas phase method 2 parts of white carbon black, 0.3 part of defoamer BYK-066N (produced by BYK Company in Germany), 1 part of antioxidant 1010, 1 part of ultraviolet absorber UV-327, 1.8 parts of coupling agent, 0.03 part of catalyst dibutyltin dilaurate parts, and additionally add 0.01-0.05 parts of dibutyltin dilaurate as a catalyst for adjustment, use a colloid mill to disperse the filler, use an anchor stirring device in the reactor, the speed is 100 rpm, the temperature is 110°C, and the vacuum degree is -0.09MPa. Heat and evacuate for 4 hours. Cool to 60°C, pack and store.

[0049] Component B: PM-200 (produced by Yantai Wanhua), directly packaged in proportio...

Embodiment 3

[0058] Example 3: Suitable for repairing large areas with high temperature

[0059] When the site construction environment temperature is very high and the area to be repaired is large, if the conventional repair formula is still followed, the high temperature reaction speed will cause implosion after pouring, which will cause the repair to fail. In order to avoid this situation Appear, adopt another A component that does not contain any catalyst to reduce the concentration of the catalyst in A component, reach the purpose of reducing reactivity.

[0060] Production:

[0061] A component: exactly the same as described in Example 1; and additionally mix it with another A component that is basically the same as its component but does not contain any catalyst in a ratio of 1:1 for adjustment, using a colloid mill To disperse the filler, an anchor stirring device is used in the reactor, the rotation speed is 100 rpm, the temperature is 110°C, the vacuum degree is -0.09MPa, and ...

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Abstract

The invention provides a polyurethane resin composition, a preparation method and application thereof. The polyurethane resin composition comprises a component A and a component B, wherein the component A contains polyolein polyatomic alcohol, a plasticizer, an anti-settling agent and other auxiliary agents; the component B is isocyanate or prepolymer of the isocyanate; and the mass ratio of the A to the B is 10:1-1:10. A pouring material containing the resin composition can be used as a patching material for a cement road bed, a boss resin layer and a mortar packing layer of a railway plate-type unballasted track and has the advantages of high water resistance, ageing resistance and low temperature resistance, long service life and capability of being used at a low temperature.

Description

technical field [0001] The invention relates to a polyurethane resin composition and a preparation method thereof, and a polyurethane resin pouring material, which is mainly used as a repair material for a railway slab-type ballastless track cement bed, boss resin layer and mortar filling layer. Background technique [0002] my country is carrying out large-scale passenger dedicated lines and high-speed railway construction. By 2020, the goal is to build 10,000 kilometers of passenger dedicated lines, forming a "four vertical and four horizontal" passenger dedicated line skeleton, and building rapid transit lines in the Bohai Rim, Yangtze River Delta, and Pearl River Delta regions. Passenger system railway 2000 kilometers. According to the design speed, passenger dedicated lines are divided into two types: 250 km / h and 350 km / h. According to the track structure, they are divided into two types: ballasted track and ballastless track. The ballasted track structure is subgrade-b...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L75/14C08G18/69C08G18/62C08G18/48C08G18/67C08K13/02C08K5/12C08K5/11C08K3/36E01B1/00E01B37/00
Inventor 吴绍利毛昆朋潘安徽吴智强王鑫杜伟超李海燕祝和权杜存山吴韶亮王涛
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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