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NCO replaced crosslinking cured joint filling material for concrete pavement

A cement pavement, cross-linking and curing technology, applied in the direction of roads, roads, pavement details, etc., to achieve the effect of low viscosity and good solubility

Active Publication Date: 2012-07-25
江苏超力建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the disadvantages of the above traditional isocyanate-terminated polyurethane prepolymers that are afraid of water, the present invention provides a method that overcomes the problem of fear of water during the construction of traditional gap fillers. , has excellent high temperature resistance, oil immersion resistance, erosion resistance, and has good embedding resistance and elastic recovery rate of cement pavement joint filling material

Method used

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  • NCO replaced crosslinking cured joint filling material for concrete pavement
  • NCO replaced crosslinking cured joint filling material for concrete pavement
  • NCO replaced crosslinking cured joint filling material for concrete pavement

Examples

Experimental program
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Effect test

example 1

[0073] (1) Weigh 30.022 g of succinic anhydride and 39.952 g of diisopropanolamine, first dissolve diisopropanolamine in 70 mL of DMAc, pour it into a three-necked flask with a magnetic stirrer, and then add succinic anhydride Dissolve with 70 mL DMAc, then slowly drop it into the three-necked flask while stirring, add dropwise for about 1 hour, and react at room temperature for 3 hours to obtain AB 2 type monomer. In the above system, firstly add 60 mL of toluene (toluene is a water-carrying agent), add 1.916 g of trimethylolpropane as the core molecule, add 0.3 g of p-toluenesulfonic acid, and then start heating until it boils, and there is reflux in the spherical condenser tube produce. After incubating for 7 h, slowly add 15 mL of acrylic acid dropwise to the system, dropwise for about 1 hour, control the reaction temperature at 90-120°C, separate water under reflux, react for 4-6 hours, and then remove the solvent and excess excess by distillation under reduced pressure....

example 2

[0079] (1) Put 104 mL of divinyltriamine in a 500 mL three-necked flask, cool it in an ice-water bath, and place it under N 2 Under the protection, the mixed solution of 86 mL methyl acrylate and 200 mL methanol was slowly added dropwise with a constant pressure funnel. 2 type monomer, then distilled under reduced pressure to remove methanol, then heated to 150 °C for 4 h under reduced pressure, and stopped the reaction to obtain a viscous pale yellow amino-terminated hyperbranched compound. 60ml of toluene was added to the system as a solvent, and then 15mL of acrylic acid was slowly added dropwise to the system for about 1 hour. Solvent and excess acrylic acid gave hyperbranched polymers containing a small amount of amino groups and a large amount of -C=C at the end.

[0080] (2) 30g of polyoxypropylene glycol with molecular weight of 2000, hydroxyl value of 54-58mgKOH / g, 20g of molecular weight of 3050, hydroxyl value of 55-58mgKOH / g polyoxypropylene triol, and 15g of po...

example 3

[0085] (1) Weigh 30.022 g of succinic anhydride and 39.952 g of diisopropanolamine, first dissolve diisopropanolamine in 70 mL of DMAc, pour it into a three-necked flask with a magnetic stirrer, and then add succinic anhydride Dissolve with 70 mL DMAc, then slowly drop it into the three-necked flask while stirring, add dropwise for about 1 hour, and react at room temperature for 3 hours to obtain AB 2 type monomer. In the above system, firstly add 60 mL of toluene (toluene is a water-carrying agent), add 1.916 g of trimethylolpropane as the core molecule, add 0.3 g of p-toluenesulfonic acid, and then start heating until it boils, and there is reflux in the spherical condenser tube produce. After incubating for 7 h, slowly add 15 mL of acrylic acid dropwise to the system, dropwise for about 1 hour, control the reaction temperature at 90-120°C, separate water under reflux, react for 4-6 hours, and then remove the solvent and excess excess by distillation under reduced pressure....

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Abstract

The invention relates to crosslinking joint filling glue for a concrete pavement, in which the active group -NOC of polyurethane is replaced. The joint filling glue is composed of a component A, a component B and an amine accelerating agent; when the joint sealing glue is need, the component A and the component B are taken according to a mass ratio of 1:1-2, simultaneously the amine accelerating agent accounting for 1.0%-2% of the mass of the component B is added, and the three materials are mixed and reacted to prepare the joint filling glue; the component A is a novel polyurethane prepolymer which is prepared by polymerizing polyether polyol, isocyanate, hydroxyl terminal organic silicon, a hyperbranched polymer with an esterifiable tail end part and a catalytic agent; and the componentB is formed by mixing the catalytic agent and multiple stuffing. The joint filling glue has the characteristics of good binding property, high elasticity, anti-fatigue and the like while overcoming the hydrophobic problem occurring when the traditional joint filling glue is used for field operation and the using problem of a carcinogenic crosslinking agent MOCA, has a long quality guarantee period and can solve the problem very well that the schedule of the joint filling operation of the concrete pavement is affected due to uncertain factors such as weather.

Description

technical field [0001] The invention relates to a cement pavement joint filling material, in particular to a cement pavement joint filling material which replaces NCO and is cross-linked and solidified. Background technique [0002] At present, the most commonly used cement pavement joint filler in our country is mainly polyurethane joint filling material. It has excellent characteristics such as water tightness and air tightness, elasticity, cohesiveness, durability and weather resistance, and can withstand tension for a long time. Stretch, compression and vibration, strong cohesion, can withstand thermal expansion and contraction at the joints, repeated stretching and compression without being damaged, and convenient construction, etc., have been widely used in cement concrete pavement, making the quality of cement concrete pavement It is improved, and the service life of the pavement is effectively extended. [0003] Polyurethane caulking materials are polymerized from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/14C08K13/02C08K3/34C08K3/26C08K3/36C08K3/22C08J3/24C08G18/67C08G18/48C08G18/61C08G69/44C08G69/48C08G83/00E01C11/10
Inventor 寿崇琦许林刘冰
Owner 江苏超力建材科技有限公司
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