Method for manufacturing resin foam, apparatus for manufacturing resin foam, and resin foam

The method addresses high thermal energy and equipment costs in resin foam production by using an aqueous self-emulsifying polymer emulsion with carboxyl and/or sulfonic acid groups to form resin aggregates under heat and pressure, achieving efficient resin foam production with low-pressure CO2 and reduced thermal energy.

JP2025142625APending Publication Date: 2025-10-01RICOH CO LTD
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Patent Information

Application Number
JP2024042085
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-18
Publication Date
2025-10-01

AI Technical Summary

Technical Problem

Existing resin foam production methods using supercritical CO2 require high thermal energy and high pressures, leading to increased equipment costs and the use of harmful additives.

Method used

A method utilizing an aqueous self-emulsifying polymer emulsion with carboxyl and/or sulfonic acid groups to form resin aggregates under heat and pressure, followed by CO2 impregnation and release, producing resin foam without harmful solvents or additives, using low-pressure CO2 (5 to 15 MPa) and reducing thermal energy requirements.

Benefits of technology

The method achieves resin foam production with reduced thermal energy consumption and equipment costs while avoiding harmful additives, using low-pressure CO2 to form bubbles in the resin.

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Abstract

To provide a method for manufacturing a resin foam that reduces the thermal energy required for production by using low-pressure CO2 (5 to 15 MPa) without employing harmful organic solvents or foaming additives.SOLUTION: There is provided a method for producing a resin foam using an aqueous self-emulsifying type polymer emulsion containing a resin having carboxyl groups and / or sulfo groups, the method comprising: a CO2 impregnation step of forming aggregates of the resin by introducing CO2 into a high-pressure vessel containing the aqueous self-emulsifying type polymer emulsion and impregnating the CO2 into the aggregates; and a CO2 releasing step of releasing CO2 outside the high-pressure vessel.SELECTED DRAWING: None
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