一种动力电池PACK用宽温域耐热双组分聚氨酯导热结构胶及其制备方法和应用
By introducing a ternary esterification structure of high EO modified polyol, PO polyether and bio-based polyol, combined with specific fillers and isocyanate prepolymer, a microphase structure with strong molecular binding force is formed, which solves the problem of balancing room temperature flexibility and high temperature heat resistance of structural adhesives for power battery PACK, and achieves high-performance bonding in a wide temperature range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WANHUA CHEM BEIJING
- Filing Date
- 2024-12-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing structural adhesives for power battery packs cannot simultaneously achieve both normal flexibility and high-temperature heat resistance. They cannot maintain excellent bonding strength and toughness in a wide temperature range environment, and there is a risk of high-temperature modulus loss and aging failure.
The ternary esterification structure of high EO modified polyol, PO polyether and bio-based polyol is adopted, combined with metal and non-metal inorganic fillers, and isocyanate-based polyurethane prepolymer to form a microphase structure with strong molecular binding force, which improves the stability of molecular chain segments at high temperature, and enhances the adhesion to metal surface through polyfunctional alkoxysilane.
It achieves a combination of low modulus and heat resistance of polyurethane adhesive in a wide temperature range environment, with high toughness and good bonding strength at room temperature, and stable modulus at high temperature. This reduces the risk of damage to power battery packs under long-term vibration and high-temperature conditions, and has excellent resistance to damp heat and thermal shock.
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