Metal Oxide Infrared Attenuation Blends for Stable Foam Insulation

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Solution Overview

Problem

Individual inorganic infrared attenuation agents (IAAs) used in insulating polymer foams typically block only a narrow range of infrared wavelengths, allowing unblocked IR radiation to be transmitted, leading to uneven heating and dimensional changes in rigid foamed polymeric boards, such as warping and distortion.

Innovation Solution

The use of blends of metal oxides, including silicon dioxide, manganese (IV) oxide, iron (III) oxide, magnesium oxide, bismuth (III) oxide, cobalt oxide, zirconium (IV) oxide, molybdenum (III) oxide, titanium oxide, and calcium oxide, which absorb a broader range of IR wavelengths, reducing thermal conductivity and uniformizing heat distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual inorganic infrared attenuation agents are used, then the insulating material provides some thermal resistance, but the IR radiation transmission is not sufficiently blocked across the full infrared spectrum

Engineering Contradiction:

Improvethermal resistanceVSAvoidIR wavelength blocking range

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent combines multiple inorganic infrared attenuation agents (such as titanium dioxide, zinc oxide, aluminum oxide, and silicon dioxide) into a single composite IAA formulation. This merging of multiple agents with different absorption characteristics enables the material to block a broader spectrum of infrared wavelengths while maintaining effective thermal resistance, directly resolving the contradiction between narrow wavelength blocking and sufficient thermal resistance.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention employs composite inorganic IAA materials that integrate multiple metal oxides and ceramic particles with complementary infrared absorption properties. This composite approach creates a synergistic effect where the combination of different agents provides comprehensive spectral coverage across the infrared range while maintaining the thermal resistance performance needed for effective insulation.

Inventive Principle:

Principle #40Composite materials

2Device complexity

If flake-like inorganic materials are used as IAAs, then the material structure is simple, but the infrared attenuation is limited to narrow wavelength ranges

Engineering Contradiction:

Improvematerial structureVSAvoidinfrared wavelength blocking

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent modifies the chemical composition parameters of the IAA by incorporating multiple metal oxides with different bandgap energies and absorption characteristics. This parameter change in composition enables the material to attenuate infrared radiation across a broader wavelength range while maintaining a relatively simple flake-like structural form, thus resolving the contradiction between structural simplicity and spectral versatility.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If conventional IAAs are used, then the manufacturing process is straightforward, but uneven heating and dimensional changes occur due to insufficient IR blocking

Engineering Contradiction:

Improvemanufacturing processVSAvoiddimensional stability

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent merges multiple infrared attenuation agents into a unified composite formulation that can be incorporated into the foam manufacturing process using conventional mixing and foaming techniques. This combined IAA provides superior and more uniform infrared blocking across the spectrum, preventing the uneven heating that causes warping and dimensional instability, thus maintaining ease of manufacture while improving dimensional precision.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The metal oxide blends effectively block a wide range of IR wavelengths, reducing thermal conductivity and preventing uneven heating, thus maintaining the dimensional stability of insulating polymer foams.

Implementation Method 1

The metal oxide blends effectively block a wide range of IR wavelengths, reducing thermal conductivity

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 2

Polymeric foam is widely used as insulating material... The purpose of insulating materials is to prevent or reduce the transfer of heat

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS20260109828A1Infrared Attenuation Agent Blends

Publication Date: 2026.04.23 OWENS CORNING INTELLECTUAL CAPITAL LLC

AI summary

Inorganic infrared attenuation agent blends have been developed to improve the thermal insulation properties of polymeric foams such as polystyrene low density foams. The inorganic infrared attenuation agent blends can include two or more metal oxides such as silicon dioxide, manganese (IV) oxide, iron (III) oxide, magnesium oxide, bismuth (III) oxide, cobalt oxide, zirconium (IV) oxide, molybdenum (III) oxide, titanium oxide, and calcium oxide. In some preferred embodiments, the inorganic infrared attenuation agent blends can include four or more of these metal oxides.