High-strength flame-retardant polyurethane sealant for high-speed rail passenger cars and preparation method thereof

A technology of polyurethane sealant and high-speed rail, applied in the direction of polyurea/polyurethane adhesive, chemical instruments and methods, adhesives, etc., can solve the problem that it is difficult to meet the performance requirements of high-speed rail cars, and polyurethane sealant is difficult to meet the strength and flame retardancy Requirements and other issues, to achieve the effect of high strength, wide application range and good compatibility

Active Publication Date: 2021-02-02
JINAN NORTH TAIHE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to provide a single-component high-strength flame-retardant polyurethane sealant for high-speed rail cars, so as to solve the problem that the polyurethane sealant in the prior art is difficult to meet the requirements of strength and flame retardancy. Problems of Performance Requirements for High-speed Railway Vehicles

Method used

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  • High-strength flame-retardant polyurethane sealant for high-speed rail passenger cars and preparation method thereof
  • High-strength flame-retardant polyurethane sealant for high-speed rail passenger cars and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0051] According to the formulation amount shown in Table 1 below, take a selected amount of primary hydroxyl polyether diol and polyether triol into the reaction kettle, heat to 120°C, and vacuum dehydrate for 2 hours at a vacuum degree of -0.09MPa to reach the water content <0.05%, then lower the temperature to 60°C, add the selected MDI and TDI in proportion while stirring, then raise the temperature to 80°C for 4 hours, then cool to about 60°C to obtain prepolymer A.

[0052] According to the formulation amount shown in Table 1 below, take a selected amount of P,P-dihydroxyethyl phosphate and put it into the reactor, heat it to 120°C, and vacuum dehydrate it for 2 hours at a vacuum degree of -0.09MPa until the water content is < 0.05%, then lower the temperature to 60°C, add a selected amount of MDI in proportion while stirring, then raise the temperature to 80°C to react for 4 hours, and cool to about 60°C to obtain prepolymer B.

[0053] In Examples 1-4, the above prepol...

Embodiment 5

[0060] The base prepolymer and PU plasticizer were prepared according to the raw materials and ratios in Example 1 in Table 1 above.

[0061] The above-mentioned basic prepolymer 30kg, PU plasticizer 20kg, filler (calcium carbonate 25.6kg, talcum powder 4.8kg, titanium dioxide 0.96kg, fumed silica 0.64kg) 32kg, stabilizer (p-toluenesulfonic acid group isocyanate ) 1kg, solvent (methylcyclohexane) 15kg, auxiliary agent (kh560 coupling agent) 2kg, add to the planetary mixer, stir at high speed under vacuum until uniform and free of particles, and the polyurethane sealant can be obtained.

Embodiment 6

[0063] The base prepolymer and PU plasticizer were prepared according to the raw materials and ratios in Example 2 in Table 1 above.

[0064] The above-mentioned basic prepolymer 70kg, PU plasticizer 5kg, filler (calcium carbonate 36kg, titanium dioxide 3.2kg, fumed silica 0.8kg) 40kg, catalyst (p-toluenesulfonic acid isocyanate) 1kg, solvent (methyl Add 5kg of cyclohexane, 5kg of dimethyl carbonate) and 10kg into a planetary mixer, and stir at high speed under vacuum until it is uniform and free of particles, and then the polyurethane sealant can be obtained.

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Abstract

The invention belongs to the technical field of polymer materials, and in particular relates to a single-component high-strength flame-retardant polyurethane sealant for high-speed rail cars and a preparation method thereof. The one-component high-strength flame-retardant polyurethane sealant for high-speed rail passenger cars of the present invention uses basic prepolymers and PU plasticizers as main raw materials, supplemented by fillers and various additives, and the prepared polyurethane sealant has the following properties: It has the advantages of high strength, good flame retardancy and wide application range.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a single-component high-strength flame-retardant polyurethane sealant for high-speed rail cars and a preparation method thereof. Background technique [0002] Polyurethane (PU) is a class of polymers containing -NHCOO- repeating structural units in the main chain. It was first discovered by Professor Otto Bayer in Germany in 1937. It was prepared by polyaddition reaction of polyisocyanate and polyol compound, and based on this, it entered the market. industrial applications. my country's polyurethane industry started in the late 1950s and has developed rapidly in the past ten years. At present, widely used polyurethanes include rigid polyurethane plastics, soft polyurethane plastics, polyurethane elastomers and other forms, and are divided into two categories: thermoplastic and thermosetting, and their raw materials are generally in the state of resin. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/08C09J175/04C09J11/06C09J11/04C08G18/48C08G18/32C09K3/10
CPCC08G18/3885C08G18/4812C08K2003/2241C08K2003/265C08L2201/02C09J11/04C09J11/06C09J175/08C09K3/10C09K2003/1078C08L75/04C08K5/205C08K3/26C08K3/22C08K3/36C08K13/02
Inventor 徐勤福邓桃益孙有利张君仪海霞臧家庆冯永强李海柱王昭德
Owner JINAN NORTH TAIHE NEW MATERIAL
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