Refractory components

A refractory composition with aluminum hydrogen phosphite and metal oxide addresses the issues of shrinkage and black stains in thermally expandable graphite-based compositions, ensuring improved handling, refractory performance, and colored fire-resistant molded bodies with enhanced thermal expansion and strength.

JP7893525B1Active Publication Date: 2026-07-22IIDA SANGYO KABUSHIKI KAISHA
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
IIDA SANGYO KABUSHIKI KAISHA
Filing Date
2025-06-24
Publication Date
2026-07-22

AI Technical Summary

Technical Problem

Refractory compositions containing thermally expandable graphite face issues with black stains during handling and potential shrinkage of the expanded body when the graphite content is reduced, compromising their refractory performance.

Method used

A refractory composition comprising a matrix component, aluminum hydrogen phosphite, and a metal oxide, with specific content ratios, that does not contain or minimizes thermally expandable graphite, to suppress shrinkage and maintain refractory performance.

Benefits of technology

The composition effectively suppresses shrinkage and black stain adhesion, maintaining refractory performance and enabling improved handling and productivity, while allowing for colored fire-resistant molded bodies with enhanced thermal expansion and strength.

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Abstract

The present invention provides a fire-resistant composition that, even when the content of thermally expandable graphite is reduced, can suppress the contraction of the expanded body obtained by the thermal expansion of the fire-resistant composition. [Solution] The fire-resistant composition either does not contain thermally expandable graphite or contains 5% by mass or less of thermally expandable graphite. The fire-resistant composition contains a matrix component, aluminum hydrogen phosphite, and a metal oxide.
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