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Unsaturated resin composition as well as preparation method and 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, material damage, etc., to improve toughness and impact resistance, improve Low temperature resistance characteristics, the effect of solving the settlement problem

Active Publication Date: 2013-03-06
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 terminal acrylate-based prepolymer (polyurethane acrylate) PA-1: Put 500 grams of polyether polyol GE210 (Gaoqiao Petrochemical, hydroxyl value about 105 to 119) in a 1000 ml three-necked flask heated by an oil bath First carry out vacuum dehydration treatment, lower the temperature to 50°C, then put 175 grams of toluene diisocyanate TDI into it, first react at 50°C for 2 hours, then add 0.1% of the catalyst dibutyltin dilaurate, and heat up to 90 Fully react at ℃ for 2 hours to obtain the terminal isocyanate group product, then add 120 grams of hydroxyethyl acrylate and 0.1% of the total weight of the system. The urethane acrylate resin is easy to use in order to adjust the viscosity, and then add neopentyl glycol diacrylate whose weight accounts for 15% of the total weight of the prepolymer to dilute.

[0045] Preparation of Acrylic Epoxy Resin EA-1: In a 1000 ml three-necked flask heated by an oil bath, at 90°C, methacrylic acid and bisphenol A epoxy r...

Embodiment 2

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

[0054] Take 100g of component A, 5g of component B, 50g of filler, and 0.25g of catalyst, mix and stir for 1 to 5 minutes, and pour into the crack from the pouring port until it is filled. To protect the repaired area from rainfall or accidental water ingress, the completed repair should be covered with polyethylene film or other material.

[0055] After mixing components A and B, the pot life 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 4 hours at 0°C.

Embodiment 3

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

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

[0059] Rubber granules are individually packaged as a solid filling material.

[0060] Use a brush and compressed air to fully clean up the garbage, soil and other debris around the CA mortar layer of the railway slab ballastless track to be repaired, and dry the repaired area with hot air or other methods.

[0061]Take 100g of the above-mentioned component A and 3g of component B, mix and stir at roo...

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PUM

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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 a repairing material of the unsaturated resin composition, which is mainly used as a repairing material for railway slab ballastless track cement 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 passenger dedicated lines, forming a "four vertical and four horizontal" passenger dedicated line skeleton, and constructing the Bohai Rim, Yangtze River Delta, and Pearl River Delta regions. 2,000 kilometers of rapid passenger transit system railway. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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