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Special putty for rail transit, and preparation method thereof

A technology of rail transit and atomic ash, applied in the direction of filling slurry, etc., can solve the problems of poor grinding performance, strict scraping thickness requirements, large fumed silica, etc., achieve excellent grinding performance, improve construction efficiency, and improve grinding performance Effect

Inactive Publication Date: 2021-06-29
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of fumed silica used in this formula is relatively large, the sanding property is poor, and the requirement for scraping thickness is strict (≤0.5mm), and the performance of the paint film needs to be further improved, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A special elastic putty for rail transit. Experiments are carried out by changing the type of unsaturated polyester. The numbers are 1#, 2#, 3#, 4#. The specific formula and dosage are shown in Table 1. The preparation method is as follows:

[0032] S1: Put in the formula quantity of special modified linear structure air-drying type unsaturated polyester resin, special modified network structure air-drying type

[0033] Unsaturated polyester resin, dispersant, drier, defoamer 300-600 rpm, stirring for 5-10 minutes;

[0034] S2: Add the titanium dioxide of formula quantity in S1, fumed silicon dioxide 1800-2500 rev / min, stir 5-10 minute;

[0035] S3: Add 800-mesh talcum powder, 1250-mesh talcum powder, and styrene to S2 in turn, stir at 1800-2500 rpm for 15-20 minutes, keep the temperature at 48°C-50°C, and vacuum for 3- 5 minutes, get an A;

[0036] Component B component cyclohexanone peroxide atomic ash curing agent;

[0037] S4: Mix according to the mixing ratio of...

Embodiment 2

[0044] Experiments were carried out by changing the composition ratio of the special modified linear structure air-drying unsaturated polyester resin and the special modified network structure air-drying unsaturated polyester resin in the formula, and the other dosages and preparation methods were the same as those in Example 1 , the specific number is 5#, 6#, 7#, and the performance test of the paint film is shown in Table 3. The ratio of the two is between 1:0.3-0.7, which can achieve good powdering, excellent bending performance, and excessive linearity. If it is too long, it is not conducive to grinding, and it is easy to stick to sand. When the mesh is too much, it has high hardness, poor bending performance, and is not easy to polish.

[0045] Table 3 Changing resin ratio and performance testing

[0046] Numbering 1# 5# 6# 7# Special modified linear structure air-drying unsaturated polyester resin 28.5 36.5 15 26.5 Special modified network stru...

Embodiment 3

[0048]Change the preparation process of Example 1, change the temperature in step S3, lower the temperature, the temperature is 25°C and 37°C at room temperature, and the numbers are 1-1#, 1-2# respectively, and the performance of the paint film is tested. See Table 4. It can be clearly seen that during the preparation of putty, the temperature has a great influence on the grindability and storage stability of the prepared putty. The patented 50°C can achieve good storage stability and easy grinding. Powder, excellent smoothness.

[0049] Table 4 Experiments were performed by changing the temperature in step s3 of atomic ash preparation

[0050] Test items 1# 1-1# 1-2# Storage normal slight layering slight layering Grinding property (GB / T5209, GB / T9286) Good powder, non-stick sandpaper, good smoothness Poor powdering, slight sticky sand, poor smoothness Poor powdering, poor smoothness Scratch property (GB / T1765, GB / T1766, GB / T9286) goo...

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PUM

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Abstract

The invention belongs to the field of coatings, and particularly relates to a special putty for rail transit, and a preparation method thereof. The special putty for rail transit is composed of a component A and a component B. The component A is composed of air-drying unsaturated polyester resin, fumed silica and the like. The elastic putty has the advantages of excellent scraping property, excellent polishing property, excellent flexibility and excellent drying property. The product disclosed by the invention can be polished after being coated and scraped at room temperature for 4 hours, is free from sand adhesion, good in powdering during polishing, good in smoothness and few in sand holes, and greatly improves the construction.

Description

technical field [0001] The invention belongs to the field of coatings, and specifically designs a special elastic putty for rail transit and a preparation method thereof. [0002] technical background [0003] Atomic ash is mainly made of unsaturated polyester resin, which is mainly used for filling and modifying defects such as pits, pin shrinkage cavities, and cracks of the substrate, so as to meet the leveling and smoothing of the substrate surface before spraying. Rail transit refers to a type of vehicle or transportation system in which operating vehicles need to run on specific tracks. Rail transportation generally has a large volume and high speed, and the train itself will generate strong vibrations, which puts forward extremely high requirements on the flexibility, bendability and temperature change resistance of the putty. [0004] Patent No. "CN107641365A" discloses a special putty for motorized trains and its preparation method and application, including main ash...

Claims

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Application Information

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IPC IPC(8): C09D5/34
CPCC09D5/34
Inventor 施沃成江瀚黄劼冯兆华冯兆均
Owner GUANGDONG YATU CHEM
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