Moisture-curable hot melt adhesive

A hot-melt adhesive, moisture-curing technology, applied in the direction of adhesive types, ester copolymer adhesives, polyurea/polyurethane adhesives, etc. problem, to achieve excellent light resistance, improved light resistance, excellent light resistance and durability

Active Publication Date: 2014-08-20
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent Documents 1 to 3 do not use moisture-curable hot-melt adhesives for house interiors and automotive interior materials, and it is difficult to say that the moisture-curable hot-melt adhesives have sufficiently excellent light resistance sex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10 and comparative example 1-7

[0139] According to the formulations shown in Table 1 and Table 2, the raw materials were mixed to prepare a moisture-curable hot melt adhesive.

[0140] Specifically, all raw materials except the isocyanate compound were charged into a reaction vessel, heated to 120° C., and then stirred under reduced pressure for 1 hour. After removing moisture, an isocyanate compound (xylylene diisocyanate) was added at the same temperature, followed by stirring under reduced pressure for 2 hours to obtain a moisture-curable hot melt adhesive.

[0141] An ultraviolet irradiation test was conducted in order to evaluate the light resistance of the moisture-curable hot-melt adhesives of Examples and Comparative Examples. In addition, a high pressure cocker test was performed as an accelerated test in order to evaluate durability against high temperature and high humidity.

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Abstract

A moisture-curable hot melt adhesive which is excellent in light resistance and durability against high temperature and high humidity. The moisture-curable hot melt adhesive includes a urethane prepolymer having an isocyanate group at the end and an acrylic based polymer, wherein the urethane prepolymer contains chemical structures derived from a polycarbonate polyol and a non-crystalline polyesterpolyol. The moisture-curable hot melt adhesive can be used to produce an automobile interior material since no deterioration occurs even under sunlight, or under severe high temperature and high humidity conditions in the summer season.

Description

technical field [0001] The present invention relates to a moisture curable hot melt adhesive. The present invention relates to a moisture-curable hot-melt adhesive having excellent light resistance and durability and which is particularly suitable for automotive interior applications. Background technique [0002] Moisture-curable hot melt adhesives are used in various fields such as building interior materials (or construction materials) and electronic materials. Moisture-curable hot melt adhesives contain urethane prepolymers with isocyanate groups at the ends. Generally, the adhesive produces an initial bond by being applied to two adherends (or substrate and adherend) in a hot-melt state, cooled and cured, and then passed through in the atmosphere to allow isocyanate groups Moisture curing occurs by cross-linking the groups with moisture to improve the adhesion and heat resistance of the adhesive, thereby increasing the molecular weight of the urethane prepolymer. A m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04B60R13/02C09J133/04C09J175/06
CPCC08G18/7642C08G18/4825C08G18/6229C09J133/066C08G18/4063C08G2170/20C09J175/08C08G18/12C08G18/44C08G18/4211C08L33/066C08L33/08Y10T428/31551C08G18/307
Inventor 田母神刚
Owner HENKEL KGAA
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