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Polyurethane resin composition as well as preparation method and application thereof

A technology of polyurethane resin and composition, applied in the field of polyurethane resin composition and its preparation, can solve the problems of good strength, small adjustable range of elasticity, slow curing of epoxy resin at room temperature, etc.

Active Publication Date: 2012-12-05
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Epoxy resin cures slowly at room temperature, the adjustable range of elasticity is small, good strength, hard and brittle, poor elasticity

Method used

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  • Polyurethane resin composition as well as preparation method and application thereof
  • Polyurethane resin composition as well as preparation method and application thereof
  • Polyurethane resin composition as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1-4

[0055] Add metered polyols and dioctyl sebacate (DOS) into a three-necked flask equipped with a stirrer, thermometer and vacuum adapter, start the stirrer and vacuum pump, dehydrate at about 100°C, and cool down to 50-60°C for later use. Add the measured isocyanate into the reaction bottle, slowly add the above-mentioned dehydrated polyol component, react at 75-80°C for 1.5-2h, take a sample to analyze the mass fraction of isocyanate, cool down to 50-60°C, and pack it to obtain A Component.

[0056] Add 69g of DMTDA, 0.3g of BYK-S706, 0.1g of BYK-A530 and 0.2g of Tinuvin B750.2g into a three-neck flask, stir and mix at 40-50°C for 1 hour, cool down to 40-50°C and discharge to obtain component B.

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PUM

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Abstract

The invention discloses a polyurethane resin composite as well as a preparation method and application thereof. The polyurethane resin composite comprises a component A and a component B, wherein the component A includes the following materials in parts by mass: 100 parts of hydroxy-terminated polybutadiene or hydrogenated hydroxy-terminated polybutadiene, 10-60 parts of plasticiser and 15-30 parts of isocyanate; the component B includes the following materials in parts by mass: 7-20 parts of organic amine hardener, 0-5 parts of light stabilizer, 0-2 parts of flatting agent and 0.1-0.5 part of foam suppressor; and the mass ratio of the component A to the component B is 100: (6-10). The obtained polyurethane material has the advantages of low shrinkage rate and better mechanical property and processing property and can be used for filling between shear cams of ballastless tracks of a high-speed railway and semicircular notches of track slabs.

Description

technical field [0001] The invention relates to a polyurethane resin composition and its preparation method and application, in particular to a polyurethane filling resin used in ballastless tracks of high-speed railway passenger dedicated lines. Background technique [0002] Conventional railway is on the basis of small stones (ballast), and then lays sleepers or cement rails. This railway train speed is limited and is not suitable for train high-speed running. The ballastless track is also called a new track structure. The train runs faster and more smoothly on it, and the passengers feel more comfortable. At the same time, it can reduce maintenance, reduce dust, and beautify the environment. Moreover, the train speed can reach more than 200 kilometers per hour. It is the current and future world. The trend and direction of railway construction development. [0003] The ballastless track used in the high-speed railway passenger dedicated line has many structural forms, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/69C08G18/32C08K5/12C08K5/11C08L75/14E01B1/00
Inventor 周文英韦永继张利军陈战有
Owner LIMING RES INST OF CHEM IND