New energy vehicle high-performance polyurethane hot melt adhesive and preparation method thereof

By synthesizing nano-titanium dioxide on the surface of carbon black and performing an ester exchange reaction with modified corn starch, a composite reinforcing material was prepared, which solved the problems of water resistance and heat resistance of polyurethane hot melt adhesives under high temperature and high humidity environments, and achieved high-performance adhesion and stability of polyurethane hot melt adhesives.

CN122080845APending Publication Date: 2026-05-26CHONGQING HANTUO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING HANTUO TECH CO LTD
Filing Date
2026-03-25
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing polyurethane hot melt adhesives have poor water resistance and heat resistance in high temperature and high humidity environments, and are prone to hydrolysis or thermal degradation, leading to adhesive failure.

Method used

Nano-titanium dioxide was synthesized on the surface of carbon black to form a core-shell structure. Then, laurate esterification was performed by grafting laurate onto a silane coupling agent, combined with modified corn starch, to prepare a composite reinforcing material that improves the water resistance and heat resistance of polyurethane hot melt adhesive.

Benefits of technology

The waterproof, heat-resistant and adhesive properties of polyurethane hot melt adhesives have been improved, ensuring that they are not prone to hydrolysis or thermal degradation in high-temperature and high-humidity environments, thus meeting the requirements for use in new energy vehicles.

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Abstract

The application relates to the technical field of polyurethane hot melt adhesives, and discloses a new energy vehicle high-performance polyurethane hot melt adhesive and a preparation method thereof, which comprises the following raw materials in parts by mass: polyether polyol 70-80 parts, diisocyanate 20-25 parts, chain extender 1-2 parts, composite reinforcing material 10-15 parts, catalyst 1-1.5 parts, plasticizer 5-8 parts and antioxidant 1-3 parts. The polyurethane hot melt adhesive formed by mixing and reacting the polyether polyol, the diisocyanate, the chain extender, the composite reinforcing material, the catalyst, the plasticizer and the antioxidant has high water resistance and heat resistance, the adhesive layer is not prone to hydrolysis or thermal degradation in a high-temperature and high-humidity environment, and the polyurethane hot melt adhesive meets the use requirements of new energy vehicles.
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