Unlock instant, AI-driven research and patent intelligence for your innovation.

A two-component solvent-free reactive polyurethane hot-melt adhesive applied to the automobile industry and its application method

A polyurethane hot-melt adhesive, solvent-free technology, used in polyurea/polyurethane adhesives, surface pretreatment bonding methods, adhesive heating bonding methods, etc., can solve the problem of poor heat resistance and bonding strength. Slow, low Young's modulus and other problems, to achieve broad market prospects, improve weather resistance, increase the effect of high temperature resistance

Active Publication Date: 2020-10-30
广东中粘新材料科技有限公司 +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional PUR used in the automotive industry is usually a one-component reactive polyurethane hot melt adhesive, which is greatly affected by the water vapor content (humidity) in the environment. The curing time of PUR is relatively long, and the bond strength rises slowly. Young's mold low volume, poor heat resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A two-component solvent-free reactive polyurethane hot-melt adhesive applied to the automobile industry and its application method
  • A two-component solvent-free reactive polyurethane hot-melt adhesive applied to the automobile industry and its application method
  • A two-component solvent-free reactive polyurethane hot-melt adhesive applied to the automobile industry and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A two-component solvent-free reactive polyurethane hot-melt adhesive used in the automotive industry described in the embodiment 1 of the present invention includes component A and component B:

[0035] - the component A comprises a prepolymer with an isocyanato group in its side chain, an auxiliary agent, and a first catalyst;

[0036] The prepolymer in the component A is formed by the polymerization of polyisocyanate and polyhydroxy compound b, and the generated functionality is greater than or equal to 1, and its isocyanate content is 20%; wherein the polyisocyanate is isophorone diisocyanate. (IPDI) and diphenylmethane diisocyanate (MDI) in proportion (IPDI:MDI=1:1), accounting for 50% of the total mass of component A; the polyhydroxy compound b is a polyester polyol, The hydroxyl value of P-2707 polyester polyol of Risheng Chemical Co., Ltd. is selected in the range of 150-180 mgKOH / g, and the molecular weight is 700 Daltons, accounting for 40% of the total mass of...

Embodiment 2

[0053] The present invention described in Embodiment 2 of the present invention also relates to a method for using the two-component solvent-free reactive polyurethane hot-melt adhesive for the automobile industry, especially for the sticking of the light emitting cover of the vehicle lamp, which comprises the following steps:

[0054] (1) Before use, component A and component B described in Example 1 are packaged in independent airtight containers, and the airtight containers are tinplate drums, PET / Al / Nylon / PP films, etc.;

[0055] (2) During the use process, put the A component and the B group into the melter and heat them to 100 ° C to melt, and output them to the static mixing pipe or mechanical mixing through the metering pump in proportion to mix the two components evenly, and obtain a consistent Two-component solvent-free reactive polyurethane adhesive under specified conditions;

[0056] (3) Preheat the car lampshade to be glued until the surface of the substrate reac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
hydroxyl valueaaaaaaaaaa
molecular weightaaaaaaaaaa
molecular weightaaaaaaaaaa
Login to View More

Abstract

The invention discloses a two-component solvent-free reactive-type polyurethane hot melt adhesive applied to an automobile industry and a using method of the hot melt adhesive. The polyurethane hot melt adhesive is a two-component reactive-type polyurethane hot melt adhesive, the components not only contain hydroxyl groups, but also contain an epoxy structure, the epoxy structure can react with aterminal NCO prepolymer to form polyoxazolidone, so that the high-temperature resistance of the cured hot melt adhesive is increased; and in addition, a chain extender is added, so that the curing speed of the adhesive is further accelerated, a cured adhesive layer has higher modulus, the final Young modulus can reach 1000 MPa or more, and the reaction is not limited by environmental humidity; andcycloaliphatic epoxy resin improves the water resistance, chemical resistance and weather resistance of the adhesive, and the adhesive has broad market prospects.

Description

technical field [0001] The invention relates to a two-component solvent-free reactive polyurethane hot-melt adhesive and a method for using the same, in particular to a two-component solvent-free reactive polyurethane hot-melt adhesive used in the automobile industry and a method for using the same. Background technique [0002] The traditional PUR used in the automotive industry is usually a one-component reactive polyurethane hot melt adhesive, which is greatly affected by the water vapor content (humidity) in the environment. The curing time of PUR is relatively long, the bond strength rises slowly, and the Young's mold The amount is low and the heat resistance is poor. In order to improve the assembly speed of the automobile industry and improve the heat resistance of the auto parts after bonding, the inventor adopts a unique hot-melt adhesive formula and process to solve the shortcomings of the prior art and improve the product quality. greater contribution. SUMMARY ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C09J5/02C09J5/06C08G18/42C08G18/10C08G18/32C08G18/58C08G18/72C08G18/75C08G18/76C08G18/66
CPCC08G18/10C08G18/3215C08G18/3243C08G18/42C08G18/4202C08G18/58C08G18/724C08G18/755C08G18/7671C09J5/02C09J5/06C09J175/06C08G18/6651
Inventor 黄世斌
Owner 广东中粘新材料科技有限公司