Reactive polyurethane hot melt adhesive with improved adhesion to metals
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- HENKEL KGAA
- Filing Date
- 2024-05-03
- Publication Date
- 2026-07-23
AI Technical Summary
Existing methods for bonding aluminum parts in composite structures fail to effectively address the challenges of existing technologies have not adequately addressed the need for a one-component reactive polyurethane hot melt adhesive with improved adhesion to metal parts, particularly aluminum, and the adhesive strength of such compositions is compromised by thermal instability and the use of non-fossil fuel-based, sustainable additives.
A one-component reactive polyurethane hot melt adhesive composition is formulated using a mixture of organic polyisocyanate, polyol, and silicone oligomer, optionally with other components, which does not require chemical conversion coating of metal parts and maintains adhesive strength during and after exposure to water, while avoiding silane-modified polymers.
The adhesive composition exhibits improved adhesion to untreated aluminum frames, maintains thermal stability, and ensures high bonding strength in composite structures, even under extreme conditions, without the need for chemical pretreatment of metal surfaces.
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