Polyurethane resin composition, preparation method and application thereof

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...