Modified polyurethane hot melt adhesive containing imide structure

By introducing imide structures and polydimethylsiloxane segments into the polyurethane backbone, a rigid-flexible structure was constructed, which solved the problems of bonding strength and elastic recovery of polyurethane hot melt adhesives under extreme environments, and achieved a balance between high-temperature stability and flexibility.

CN122188574APending Publication Date: 2026-06-12ZHEJIANG AOYU NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG AOYU NEW MATERIAL TECH CO LTD
Filing Date
2026-05-06
Publication Date
2026-06-12

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Abstract

The application belongs to the technical field of polyurethane hot melt adhesive preparation, and particularly relates to a modified polyurethane hot melt adhesive containing imide structure. By using raw materials including pyromellitic dianhydride and 2-amino-1,3-propanediol, a diol containing imide structure is prepared; by using raw materials including mixed polyether, hydroxyl-terminated polydimethylsiloxane, the diol containing imide structure and 1,4-butanediol, a mixed polyol is prepared; then raw materials including isocyanate, the mixed polyol, a catalyst and an additive are polymerized and extruded to obtain the modified polyurethane hot melt adhesive; by introducing rigid imide structure into the polyurethane main chain, the thermal stability of the polyurethane main chain is improved; by introducing the hydroxyl-terminated polydimethylsiloxane segment, the modified polyurethane hot melt adhesive has excellent flexibility, and plastic deformation of the bonding part under stress is effectively prevented.
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