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Polyurethane adhesive for bonding extruded sheet for high-speed railway and preparation method thereof

A polyurethane adhesive, high-speed railway technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problems of no extruded board adhesive, construction technology and insufficient bonding strength, etc. To achieve the effect of good bonding effect, good elasticity and good bonding effect

Inactive Publication Date: 2010-12-22
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a need for an adhesive that has anti-sagging performance, is easy to apply, and has a large adhesive force. However, most of the adhesives used in extruded board bonding technology are converted from adhesives in other fields (such as geotextile bonding). Adhesive), there are deficiencies in construction technology and bonding strength, and there is no adhesive specially used for extruded board bonding

Method used

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  • Polyurethane adhesive for bonding extruded sheet for high-speed railway and preparation method thereof
  • Polyurethane adhesive for bonding extruded sheet for high-speed railway and preparation method thereof
  • Polyurethane adhesive for bonding extruded sheet for high-speed railway and preparation method thereof

Examples

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Embodiment 1

[0026] This embodiment provides a polyurethane adhesive, the adhesive is suitable for the adhesive of high-speed railway ballastless track extruded board bonding, the adhesive has a good bonding effect on the concrete board or polyurea waterproof layer and high-strength extruded board, the The adhesive is compounded by the first component and the second component at a mass ratio of 2.85-3.15:1. The isocyanate content of the adhesive is 23%-28% by mass, and the viscosity is 200% at 25°C. ~400mPa·s; Among them, the first component is composed of 30-60% of hydroxyl-terminated polyurethane prepolymer, 5-10% of diluent, 1-3% of small molecule chain extender, and 30-60% of inorganic filler in terms of mass percentage. 60%, anti-sag additive 1-3%, hygroscopic agent 1-3%, defoamer 0.2-0.5% and silicone coupling agent 0.5-2% as raw materials, the combination made by mixing all raw materials evenly thing;

[0027] The hydroxyl-terminated polyurethane prepolymer in the first component i...

Embodiment 2

[0054] This example provides a method for preparing a polyurethane adhesive, which is an adhesive suitable for bonding extruded boards in ballastless tracks of high-speed railways, and is applied to concrete slabs or polyurea waterproof layers and high-strength extruded boards. Bonding to achieve a good bonding effect, the preparation method specifically includes:

[0055] Preparation of hydroxyl-terminated polyurethane prepolymer:

[0056] Get raw materials according to the following ratio:

[0057] Raw material ratio (parts by mass)

[0058] Polyether trihydric alcohol (molecular weight is 500) 50

[0059] Polyether diol (molecular weight is 400) 12

[0060] Dioctyl phthalate 23

[0061] Diphenylmethane diisocyanate 15;

[0062] Preparation method: Add 50 parts by mass of polyether triol and 12 parts by mass of polyether diol into a synthesis reaction kettle, raise the temperature to 50°C, turn off the heating, and add 15 parts by mass of diphenylmethane diisocyanate Q...

Embodiment 3

[0092] This example provides a method for preparing a polyurethane adhesive, which is an adhesive suitable for bonding extruded boards in ballastless tracks of high-speed railways, and is applied to concrete slabs or polyurea waterproof layers and high-strength extruded boards. Bonding to achieve a good bonding effect, the preparation method specifically includes:

[0093] Preparation of hydroxyl-terminated polyurethane prepolymer:

[0094] Get raw materials according to the following ratio:

[0095] Raw material ratio (parts by mass)

[0096] Polyether trihydric alcohol (molecular weight is 800) 60

[0097] Polyether diol (molecular weight is 2000) 15

[0098] Diisononyl phthalate 15

[0099] Carbodiimide-modified diphenylmethane diisocyanate 10;

[0100] Preparation method: Add 60 parts by mass of polyether triol and 10 parts by mass of polyether diol into a synthesis reaction kettle, raise the temperature to 50°C, turn off the heating, and modify 15 parts by mass of ca...

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Abstract

The invention discloses a polyurethane adhesive for bonding an extruded sheet for a high-speed railway and a preparation method thereof, which belong to the field of adhesive preparation. The method comprises the following steps of: compounding a terminal hydroxyl polyurethane perpolymer, obtained through the synthetic reaction of multiple trifunctional polyether polyols, bifunctional polyether polyols, methyl diphenylene diisocyanate or a derivative thereof and a thinner under certain conditions, with a small molecular chain extender, an anti-sagging auxiliary agent, a foam suppressor, a moisture absorbent, an inorganic filler and an organosilicon coupler to be used as the first component of the adhesive; and with polyisocyanate as the second component of the adhesive, proportionally compounding the two components to obtain the polyurethane adhesive. The adhesive prepared by the method has the characteristics of high curing speed, good bonding effect, high mechanical performance, sagging resistance, convenient construction and the like. No primer is applied, so that a good bonding effect is achieved between a concrete plate or a polyurea waterproof layer and a high-strength extruded sheet. The invention completely satisfies the technical standard and the criterion of a ballastless track technology.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a polyurethane adhesive for bonding extruded boards for high-speed railways and a preparation method thereof. Background technique [0002] With the current pace of domestic infrastructure construction and development accelerating, many high-speed railway passenger dedicated lines have adopted a large number of advanced techniques and cutting-edge technologies (such as ballastless track technology) in the construction process. The development of high-speed railways in the world has proved that if the conventional track system is used for high-speed railway foundation projects, the ballast will be severely pulverized, the line maintenance will be frequent, and the safety, comfort and economy will be relatively poor. Adopting ballastless track technology, the stability and comfort of high-speed trains are at an excellent level, and all the test data are within the safety standard...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04
Inventor 刘滨
Owner BEIJING COMENS NEW MATERIALS
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