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Preparation method of single-component adhesive suitable for high-speed railway sliding layer

A single-component, sliding layer technology, applied in the direction of non-polymer adhesive additives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem that the remaining parts can only be scrapped, the mixing is difficult to meet the requirements, and the application Short term and other issues, to achieve good operability, excellent weather resistance, long pot life effect

Inactive Publication Date: 2010-09-08
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, two-component polyurethane adhesives are mostly used in the sliding layer of high-speed rail. These two-component adhesives need to be prepared on site according to a fixed ratio before use, and because the system itself has a certain viscosity, it is very laborious and difficult to mix manually. Difficult to meet the requirements, most require mechanical means to stir evenly, the pot life is very short, the prepared adhesive needs to be used up at one time, if the remaining part cannot be used up at one time, it can only be scrapped, and there is a lot of waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing a one-component adhesive suitable for a high-speed iron sliding layer, the method comprising:

[0028] Preparation of polyurethane prepolymer:

[0029] The amount of each raw material used in this step is all by mass percentage, with 40-70% polyether diol, 10-40% polyether triol, 10-30% diisocyanate, after adding 0.005%~ In the case of 0.01% tin catalyst, react at a temperature of 75-85°C for 0.5-1.5 hours, then add 5-20% polyisocyanate with a functionality of not less than 3, and continue the reaction at a temperature of 75-85°C for 0.5 ~1.5 hours, obtain the polyurethane prepolymer that NCO percentage content is 2~5%;

[0030] Prepare the adhesive:

[0031] The amount of each raw material used in this step is calculated by mass percentage, and 30-60% of the above-mentioned polyurethane prepolymer, 10-20% of plasticizer, 20-50% of inert inorganic filler, 3-10% of Active inorganic filler, 0.5-2% latent curing agent, 0.5...

Embodiment 2

[0044] This example provides a method for preparing an adhesive, which is a method for preparing a one-component polyurethane adhesive that meets the bonding requirements of the high-speed rail sliding layer. The adhesive prepared by this method is environmentally friendly and has a high viscosity. strong bonding strength, convenient operation during use, and no need for premixing. The preparation method specifically includes:

[0045] Preparation of polyurethane prepolymer:

[0046] With the polyether glycol (HSH-210) of 48 mass parts and the polyether trihydric alcohol (HSH-310) of 25 mass parts and the methylene diphenyl diisocyanate of 22 mass parts, in the octanoic acid ethylene diisocyanate of 0.005 mass part In the presence of tin, react at 75°C for 1.5 hours, then add 4.995 parts by mass of dimethyltriphenylmethane tetraisocyanate, and continue the reaction at 75°C for 1.5 hours to obtain a polyurethane preform with an NCO percentage in the range of 2 to 5%. Polymer; ...

Embodiment 3

[0050] This example provides a method for preparing a one-component polyurethane adhesive that meets the bonding requirements of high-speed rail sliding layers. The prepared adhesive is environmentally friendly and has high bonding strength. It is easy to operate and does not require premixing. , the preparation method specifically includes:

[0051] Preparation of polyurethane prepolymer:

[0052] With 55 mass parts of polyether diols containing tetrahydrofuran diol block and 28 mass parts of polyether trihydric alcohols (TMN-303) and 13 toluene diisocyanates, in the presence of 0.008 mass parts of dibutyltin diacetate, React at a temperature of 80°C for 1 hour, then add 3.992 parts by mass of TMP-TDI polymer, and continue to react at 80°C for 1 hour to obtain a polyurethane prepolymer with an NCO percentage in the range of 2 to 5%;

[0053] Adhesive preparation:

[0054] With the above-mentioned polyurethane prepolymer of 35 mass parts, the dioctyl azelate of 15 mass parts...

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Abstract

The invention discloses a preparation method of a single-component adhesive suitable for a high-speed railway sliding layer. The method comprises the following steps: synthesizing a polyurethane prepolymer under certain conditions by utilizing the combination of polyether glycols with different degrees of functionality and isocyanates with different degrees of functionality in a certain proportion; and compounding the synthesized prepolymer with plasticizer, inorganic filler, latent curing agent, organosilicon coupling agent, wetting dispersant and catalyst in a certain proportion, thus obtaining the environmental-protection solvent-free single-component polyurethane adhesive. Though the combination design on the polyether glycols with different degrees of functionality and polyisocyanates with different degrees of functionality, combination design on inorganic filler, and selection on specific coupling agent, the adhesive prepared by the method has high mechanical properties, high adhesive force for various base materials, such as waterproof layers, concrete surfaces, high-strength extruded sheets and the like, outstanding acid and alkali resistance, favorable weatherability and good operability, and can be used immediately after the adhesive is unpacked without premixing.

Description

technical field [0001] The invention relates to the field of adhesive preparation, and is characterized in that it relates to a preparation method of a one-component adhesive suitable for high-speed iron sliding layers. Background technique [0002] Since China's first express passenger dedicated line was put into operation in October 2003, my country's high-speed railway technology has developed vigorously. In just a few years, my country has built the Beijing-Tianjin intercity passenger dedicated Guangzhou High Speed ​​Railway, Ningbo-Taiwan-Wenzhou Passenger Dedicated Line, Wenzhou-Fuzhou Passenger Dedicated Line, Fuxia Passenger Dedicated Line and many high-speed railways and passenger dedicated lines, but there are still Beijing-Shanghai, Beijing-Shi, Hewu, Hening, Guangzhou-Shenzhen-Hong Kong, Guangzhou-Zhuhai , Jingqin, Ninghang, Hangyong, Changji, Jiuchang, Harbin-Dalian, Jiaoji, Hainan East Ring, Daxi and many other high-speed railways are under construction. [0003...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C09J11/06
Inventor 赵鹏
Owner BEIJING COMENS NEW MATERIALS
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