Rigid polyvinyl chloride foams and methods for making the same
By constructing a multi-level cross-linked network using polydopamine-modified SiC and isocyanate in rigid polyvinyl chloride foam, the problem of poor compatibility between inorganic fillers and organic matrix was solved, thereby improving the mechanical strength and thermal stability of the foam.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGYING RUIZHI NEW MATERIAL CO LTD
- Filing Date
- 2026-06-15
- Publication Date
- 2026-07-17
AI Technical Summary
Poor compatibility between inorganic fillers and organic matrix leads to filler agglomeration during the foaming process of rigid polyvinyl chloride foam, resulting in defects and reduced compressive strength and mechanical reliability.
Polydopamine-modified SiC was used as a filler, and a multi-level cross-linked network was constructed by reacting isocyanate with acid anhydride and water. Polyvinyl butyral was used as a flexible bridging branch to enhance the combination of inorganic rigid nodes and organic network, forming a stable multi-level cross-linked structure.
It significantly improves the mechanical strength and thermal stability of rigid polyvinyl chloride foam, and achieves stable dispersion and synergistic reinforcement of inorganic fillers in organic matrix.
Smart Images
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