Phenolic resin foam, method for producing the same, and thermal insulation material containing the same

A phenolic resin foam with controlled pH and composition achieves stable, low-acidity properties, addressing corrosion and performance issues, with improved thermal insulation and mechanical strength.

JP7864167B2Active Publication Date: 2026-05-22LG HAUSYS LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
LG HAUSYS LTD
Filing Date
2024-10-07
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Phenolic resin foams with curing agents are highly acidic, leading to corrosion of surrounding metal materials and disrupting foaming and curing performance, resulting in uneven thickness, poor mechanical properties, and increased thermal conductivity.

Method used

A phenolic resin foam with a pH of 4 or higher is produced by adjusting the composition of phenolic resin, foaming agent, and curing agent to achieve uniform thickness, excellent durability, and low acidity, using specific ratios and agents like hydrofluoroolefin compounds and crosslinking agents.

Benefits of technology

The phenolic resin foam exhibits low acidity, maintaining excellent thermal conductivity, compressive strength, and uniform thickness, preventing corrosion and ensuring stable long-term use.

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Patent Text Reader

Abstract

To provide a phenolic resin foam that has a low acidity of pH 4 or higher, and at the same time can implement physical properties such as excellent durability and thermal conductivity with a uniform thickness.SOLUTION: There is provided a phenolic resin foam which is a thermosetting product of a foamable composition containing a phenolic resin, a foaming agent, a curing agent, and a cross-linking agent and has a pH of 4 or more. A mass ratio of carbon to sulfur (C / S) measured by EDX (energy dispersive X-ray analysis) at the vertex of the cell of the phenolic resin foam is 25 to 250, and a mass ratio of oxygen to sulfur (O / S) measured by EDX at the vertex of the cell of the phenolic resin foam is 5 to 60.SELECTED DRAWING: Figure 1
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