Expandable chlorinated vinyl chloride resin particles, expanded particles thereof, and chlorinated vinyl chloride resin foam molded article using the same

Expandable chlorinated vinyl chloride resin particles, combined with acrylic resin and a foaming agent, address the limitations of existing technologies by achieving high expansion ratio and closed cell ratio, ensuring excellent flame retardancy and environmental friendliness, suitable for complex shape production.

JP7727707B2Active Publication Date: 2025-08-21KANEKA CORP
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Patent Information

Application Number
JP2023211503
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-12-14
Publication Date
2025-08-21
Estimated Expiration
2039-03-29

AI Technical Summary

Technical Problem

Existing resin foam technologies, particularly those using chlorinated vinyl chloride resins, face challenges in achieving high flame retardancy, high expansion ratio, and high closed cell ratio, while also being environmentally friendly and cost-effective, especially in producing complex shapes.

Method used

The development of expandable chlorinated vinyl chloride resin particles composed of chlorinated vinyl chloride resin, acrylic resin, and a foaming agent, with specific molecular weight and chlorine content ranges, combined through a melt-kneading and extrusion process to form particles that are then pre-expanded using air or steam, resulting in a high closed cell ratio and excellent flame retardancy.

Benefits of technology

The solution achieves chlorinated vinyl chloride resin foam with high expansion ratio and closed cell content, enhancing flame retardancy and environmental friendliness, suitable for complex shape production.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

To provide a foamable chlorinated vinyl chloride-based resin particle that can yield a chlorinated vinyl chloride-based resin foam molded body having superior flame retardant performance and being high in both foaming ratio and closed cell ratio.SOLUTION: A foamable chlorinated vinyl chloride-based resin particle contains (A) chlorinated vinyl chloride-based resin, (B) acrylic resin, and (C) a foaming agent.SELECTED DRAWING: None
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Citation Information

Patent Citations

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    JP1977135360A

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  • Preparation of foamed and molded article of soft vinyl chloride resin

    JP1981133338A

  • Expandable vinyl chloride type resin composition

    JP1982137328A

  • Chlorinated polyvinyl chloride composition, foamed body and manufacture

    JP1983059233A