Preparation method of special high-elasticity high-impregnation room temperature curing two-component interpentration polyurethane patching material for ballastless track boss resin patching

A ballastless track, room temperature curing technology, used in tracks, roads, ballast layers, etc., can solve the problems of low polyether polyol content, poor permeability, poor compatibility, etc., and achieve high compressive strength and dimensional stability. Good, good heat resistance effect

Active Publication Date: 2013-10-23
ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic units have carried out related technical research, such as the development and production of environmentally friendly polyurethane elastomers produced by Zibo Yinuo Polyurethane Co., Ltd., and CRTS II polyurethane adhesives for the sliding layer of slab ballastless tracks produced by Hubei Huitian Adhesive Co., Ltd. Patent CN200510041693 is a resin filling material for high-speed railways. Due to the low content of polyether polyols in the material and the shortcomings of few types, the two-component cured material has poor permeability and is compatible with ballastless track boss resin. Therefore, the development of a structural repair material with suitable viscosity, good permeability with boss resin, good compatibility and strong interface adhesion is the key to the ballastless track mortar boss resin repair technology and its application

Method used

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  • Preparation method of special high-elasticity high-impregnation room temperature curing two-component interpentration polyurethane patching material for ballastless track boss resin patching

Examples

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Effect test

Embodiment 1

[0020] Example 1: A method for preparing a high-elasticity and high-wetting room-temperature-curing two-component interpenetrating polyurethane repair material for ballastless track boss resin repair, including:

[0021] (1) Preparation of modified interpenetrating polyether elastomer: 33kg of polyether polyol 1 and 6kg of polyether polyol 2 were heated to 80°C for 2 hours, and 13kg of polyether polyol 3 and 13kg of hard foam were added to the above system For polyether polyol 4, heat up to 90°C and react for 2 hours, then continue to heat up to 120°C, take out small molecules by passing inert gas, react for 2 hours, and discharge after cooling;

[0022] (2) Synthesis of linear block MDI prepolymer: Add 10kg of MDI into the dry reaction kettle and feed inert gas, then add 70kg of polyether glycol PPG and 3kg of dibutyltin dilaurate dropwise, and react at 90°C for 3h, Then add 150kg of acetone for dilution, cool down to 80°C, add 10kg of dimethylolpropionic acid, and end the re...

Embodiment 2

[0024] Example 2: A method for preparing a high-elasticity and high-wetting room-temperature-curing two-component interpenetrating polyurethane repair material for ballastless track boss resin repair, including:

[0025] (1) Preparation of modified interpenetrating polyether elastomer: 30kg of polyether polyol 1 and 6kg of polyether polyol 2 were heated to 80°C for 2 hours, and 15kg of polyether polyol 3 and 15kg of hard foam were added to the above system For polyether polyol 4, heat up to 90°C and react for 2 hours, then continue to heat up to 120°C, take out small molecules by passing inert gas, react for 2 hours, and discharge after cooling;

[0026] (2) Synthesis of linear block MDI prepolymer: Add 10kg of MDI into the dry reaction kettle and feed inert gas, then add 70kg of polyether glycol PPG and 3kg of dibutyltin dilaurate dropwise, and react at 90°C for 3h, Then add 175kg of acetone for dilution, cool down to 80°C, add 10kg of dimethylolpropionic acid, and end the re...

Embodiment 3

[0028] Embodiment 3: The preparation method of special high-elasticity and high-wet room temperature curing two-component interpenetrating polyurethane repair material for ballastless track boss resin repair, including

[0029] (1) Preparation of modified interpenetrating polyether elastomer: 30kg of polyether polyol 1 and 6kg of polyether polyol 2 were heated to 80°C for 2 hours, and 15kg of polyether polyol 3 and 15kg of hard foam were added to the above system For polyether polyol 4, heat up to 90°C and react for 2 hours, then continue to heat up to 120°C, take out small molecules by passing inert gas, react for 2 hours, and discharge after cooling;

[0030] (2) Synthesis of linear block MDI prepolymer: Add 10kg of MDI into the dry reaction kettle and feed inert gas, then add 70kg of polyether glycol PPG and 3kg of dibutyltin dilaurate dropwise, and react at 90°C for 3h, Then add 200kg of acetone for dilution, cool down to 80°C, add 10kg of dimethylolpropionic acid, and end...

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Abstract

The invention discloses a preparation method of special high-elasticity high-impregnation room temperature curing two-component interpentration polyurethane patching material for ballastless track boss resin patching, which comprises the following three steps: preparing a modified interpentration polyether elastomer, synthesizing linear block MDI (diphenylmethane diisocyanate) prepolymer and curing two-component interpentration polyurethane. The patching material prepared using the method disclosed by the invention has the characteristics of proper viscosity, good permeability with boss resin, good compatibility, completely controllable curing time and strong interface adhesiveness, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a method for preparing a high-elasticity, high-infiltration room-temperature-curing two-component interpenetrating polyurethane repairing material specially used for ballastless track boss resin repair. The prepared polyurethane repairing agent can be widely used in high-speed railway without Repair of resin damage on ballast track CRTS I boss. Background technique [0002] High-speed railway construction is a complex system engineering. Due to various effects such as poor construction, train dynamic load, rain and snow erosion, and ambient temperature, ballastless tracks will inevitably produce such as concrete interface damage, CA mortar erosion by water, separation Seams and cracks and other diseases. The damage to the ballastless track filling layer will seriously affect the normal use of the track. If it is not repaired in time, under the action of var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/79C08G18/48C08G18/76C08G18/12E01B1/00
Inventor 王宇峰黄海黄玉华汪志勇陈钱宝
Owner ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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