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Halogen-free flame-retardant two-component polyurethane adhesive for railway vehicle and preparation method thereof

A two-component polyurethane and rail passenger car technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of body structure bonding and other problems, and achieve good flame retardant effect, good toughness, and adhesion The effect of high bonding strength

Active Publication Date: 2015-06-10
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to develop a halogen-free flame-retardant two-component polyurethane adhesive with good bonding performance, excellent comprehensive performance, good flame-retardant effect, and environmental protection and its preparation method to solve the problem of high-speed railway passenger cars and rail transit vehicle bodies. Some problems with structural bonding

Method used

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  • Halogen-free flame-retardant two-component polyurethane adhesive for railway vehicle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add castor oil polyol 13.2% Wt, polyester polyol (hydroxyl value 167mgKOH / g, molecular weight 1000) 12.2%Wt, bisphenol A polyether polyol (hydroxyl value 270mgKOH / g, molecular weight 450) 5.4% Wt, flame retardant plasticizer dimethyl phosphate 11.4% Wt, heated to 120 ° C, and dehydrated under vacuum for 2 hours, then cooled to 60 ° C, added to the planetary mixer, Then add 57.0% Wt of aluminum hydroxide, 0.58% Wt of epoxy-terminated silane coupling agent, and 0.25% Wt of organometallic catalyst, stir for 2 hours in a vacuum state, and discharge, which is A component. Component B is liquefied polymethylene polyphenyl polyisocyanate. It can be used after being fully mixed according to A?B=6?1 (mass ratio).

Embodiment 2

[0022] Add castor oil polyol 19.4% Wt, polyester polyol (hydroxyl value 120mgKOH / g, molecular weight 1540) 21.5%Wt, bisphenol A polyether polyol (hydroxyl value 200mgKOH / g, molecular weight 658) into the three-necked flask ) 6.5% Wt, flame retardant plasticizer ethyl diethyl phosphate 8.6% Wt, heated to 120 ° C, and dehydrated under vacuum for 2 hours, then cooled to 60 ° C, added to the planetary mixer, and then Add 21.5% Wt of magnesium hydroxide, 21.5% Wt of aluminum hydroxide, 0.7% Wt of epoxy-terminated silane coupling agent, 0.3% Wt of organometallic catalyst, etc., stir for 2 hours in a vacuum state, and discharge the material, which is component A . Component B is a mixture of liquefied diphenylmethane diisocyanate 50%wt and diphenylmethane diisocyanate 50%wt. It can be used after being fully mixed according to A?B=6?1 (mass ratio).

Embodiment 3

[0024] Add castor oil polyol 20.8% Wt, polyester polyol (hydroxyl value 76mgKOH / g, molecular weight 2000) 10.4%Wt, bisphenol A polyether polyol (hydroxyl value 270mgKOH / g, molecular weight 450) 10.4% Wt, flame retardant plasticizer triisopropylphenyl phosphate 12.7% Wt, heated to 120°C, dehydrated under vacuum for 2 hours, then cooled to 60°C, and added to the planetary stirring mixer , then add 44.8% Wt of magnesium hydroxide, 0.9% Wt of epoxy-terminated silane coupling agent, 0.1% Wt of organometallic catalyst, stir for 2 hours in a vacuum state, and discharge the material, which is A component. Component B is a mixture of 50% wt of polymethylene polyphenyl polyisocyanate and 50% wt of liquefied diphenylmethane diisocyanate. It can be used after being fully mixed according to A?B=6?1 (mass ratio).

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Abstract

The invention provides a halogen-free flame-retardant two-component polyurethane adhesive for a railway vehicle and a preparation method thereof, belonging to the technical field of two-component polyurethane adhesives. The main objective of the invention is to overcome problems in bonding of the structures of the bodies of a high-speed railway carriage and a rail transit vehicle. The polyurethane adhesive mainly a component A and a component B, wherein the component A and the component B are in a weight ratio of 6: 1, the component A comprises, by weight, 10 to 35% of castor oil polyol, 10 to 40% of polyester polyol, 5 to 30% of bisphenol A polyether polyol, 5 to 25% of a flame-retardant plasticizer, 30 to 60% of a flame-retardant inorganic filling material, 0.5 to 3% of a coupling agent and 0.1 to 0.5% of a catalyst, and the component B is an isocyanate curing agent containing liquefied methyl diphenylene diisocyanate. The polyurethane adhesive has the characteristics of good flame retardation effect, environment friendliness, good bonding strength after curing and good toughness and is mainly applied to self-adhesion and mutual adhesion of materials like metals and timber of the bodies of railway vehicles.

Description

technical field [0001] The invention belongs to the technical field of two-component polyurethane adhesives. It has the characteristics of environmental protection, good flame retardant effect, environmental protection, high bonding strength after curing, and good toughness. stick. Background technique [0002] With the rapid development of my country's railways, especially the rapid development of high-speed railways and urban rail transit in recent years, railway passenger car manufacturers have higher and higher requirements for vehicle accessories and materials, such as vehicle comfort, safety and environmental protection requirements, This brings new and higher requirements to the production of railways and rail transit. The traditional techniques such as riveting and welding used in the manufacture of rail passenger car bodies are beginning to be replaced by emerging bonding techniques. In recent years, the wide application and development of bonding technology has pl...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J175/06C09J175/04C09J11/04C09J11/06C08G18/76C08G18/67C08G18/48C08G18/42
Inventor 杨足明韩胜利冯涛潘乐王建功范乐天董双良吴正明章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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