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Unsaturated resin composition as well as preparation method and a purpose thereof

A resin composition, unsaturated technology, applied in the direction of track, track maintenance, ballast layer, etc., can solve the problems of increasing the rigidity of the cured product, poor low temperature resistance, easy flow of glue, etc., to improve toughness and impact resistance. , Improve low temperature resistance and solve the effect of glue flow

Active Publication Date: 2010-06-09
BEIJING RAILWELD NEW MATERIAL TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unsaturated polyester resin has a lot of ester bonds in the main chain of the molecule, and it is easy to break the chain under the action of water or acid-base medium, resulting in material damage, poor water resistance and aging resistance
Although styrene has good reactivity, is easy to obtain and has low cost, it has high toxicity and causes harm to the human body during use. overcome
At present, there are still formula systems that use epoxy vinyl ester resin as the main material, and styrene as the diluting monomer and crosslinking agent. The number of ester bonds on the molecular main chain of epoxy vinyl ester resin is very small, and it has excellent water resistance. And corrosion resistance, but there are also problems with the toxicity of styrene and the brittleness of the cured product.
[0008] It can be seen that the existing conventional unsaturated resin materials used for repairing slab ballastless tracks have many disadvantages: poor water resistance and aging resistance, which cannot meet the requirements of long service life for high-speed railway construction; cured products are very brittle , the low temperature resistance is poor, especially it cannot meet the requirements of use in severe cold areas; the use of styrene-based diluted cross-linking monomers with high toxicity is not conducive to the health of construction workers; the use of inorganic rigid fillers, although it can play a certain role The strengthening effect also greatly increases the rigidity of the cured product, which cannot play a good buffering role; the glue is easy to flow when the mold is not tightly sealed, which affects the efficiency of construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of acrylate-terminated prepolymer (polyurethane acrylate) PA-1: Put 500 grams of polyether polyol GE210 (Takahashi Petrochemical, hydroxyl value about 105-119) into a 1000 ml three-necked flask heated by an oil bath First carry out vacuum dehydration treatment, cool down to 50°C, then put in 175g of toluene diisocyanate TDI, initially react at 50°C for 2 hours, then add 0.1% of the total weight of the system as a catalyst, dibutyltin dilaurate, and heat up to 90 Fully react at ℃ for 2 hours to obtain the isocyanate-terminated product, then add 120 grams of hydroxyethyl acrylate and 0.1% of the total weight of the system, the polymerization inhibitor hydroquinone, continue to react at 90 ℃ for 2 hours to obtain the acrylate-terminated product In order to adjust the viscosity of the urethane acrylate resin for ease of use, neopentyl glycol diacrylate with a weight of 15% of the total weight of the prepolymer is added for dilution.

[0045] Preparation of epoxy ac...

Embodiment 2

[0053] The A component and the B component are the same as in Example 1. In order to achieve the purpose of smooth curing at a low temperature of 0°C, a separately packaged catalyst N,N-dimethylaniline is added to the formula.

[0054] Take 100g of the A component, 5g of the B component, 50g of the filler, and 0.25g of the catalyst, mix and stir for 1 to 5 minutes, and inject the cracks from the pouring port until the pouring is full. In order to protect the repaired area from rain or accidental water intrusion, polyethylene film or other materials should be used to cover the repaired area.

[0055] The service life of components A and B after mixing is 10 minutes at 0°C, the gel time is about 30 minutes, the initial curing time is 2 hours, and it can be cleaned after curing at 0°C for 4 hours.

Embodiment 3

[0057] Put 50g of acrylate-terminated prepolymer PA-1, 10g of dioctyl sebacate, 30g of methyl methacrylate, 10g of tripropylene glycol diacrylate, 1g of UV absorber UV-327 and 1g of acrylate-terminated prepolymer into a 1000ml three-necked flask. Oxygen agent 1010 1g, catalyst N,N-dimethylaniline 0.25g, carbon black 5g, thixotropic agent white carbon black 20g, coupling agent 0.9g, stir and mix for 1 hour at 100 rpm at normal temperature , Discharge as A component.

[0058] 100 g of benzoyl peroxide and 200 g of dibutyl phthalate as a plasticizer are thoroughly stirred and mixed uniformly as component B.

[0059] Pack rubber pellets individually as solid filler.

[0060] Use brushes and compressed air to fully clean up the garbage, soil and other debris around the area to be repaired in the CA mortar layer of the railway slab ballastless track, and at the same time use hot air or other methods to dry the repaired area.

[0061] Take 100g of the A component and 3g of the B component, ...

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Abstract

The invention provides an unsaturated resin composition as well as a preparation method and a purpose thereof, wherein the unsaturated resin composition contains a component A and a component B, the component A contains an acrylic resin or a prepolymer thereof, a diluent, a toughening agent, a thixotropic agent and other assistants; the component B contains a peroxide initiator and a plasticizer,and the mass ratio of A to B is 100:1 to 100: 50. The preparation method of the composition is simple and is beneficial to rapid production. A repairing material containing the composition and used as a railway plate type ballastless track cement road bed, a boss resin layer and a mortar filling layer solves the problems of poor water resistance, impact resistance, aging resistance and low temperature resistance existing in the traditional repairing material.

Description

Technical field [0001] The present invention relates to an unsaturated resin composition and a preparation method thereof, and an unsaturated resin composition repair material, which is mainly used as a repair material for railway slab ballastless track cement track bed, boss resin layer and mortar filling layer . Background technique [0002] my country is currently constructing large-scale passenger dedicated lines and high-speed railways. By 2020, the goal is to build 10,000 kilometers of dedicated passenger lines, form a “four vertical and four horizontal” passenger dedicated line skeletons, and build a railway in the Bohai Rim, Yangtze River Delta, and Pearl River Delta regions The rapid passenger transportation system railway is 2000 kilometers. The passenger dedicated line is divided into 250 km / h and 350 km / h according to the design speed. According to the track structure, it is divided into two types: ballasted track and ballastless track. The ballasted track structure i...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L33/04C08L75/16C08L71/00C08L67/07C08L63/10C08G18/67C08G18/48C08G59/17C08G59/16C08K13/02C08K5/12C08K5/14C08K3/26C08K5/11C08K3/04E01B1/00E01B37/00
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 BEIJING RAILWELD NEW MATERIAL TECH CO LTD
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