Polyurethane Foam Phosphonate Additive for Stronger Flame Lamination

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Solution Overview

Problem

Existing flame lamination additives for polyurethane foam do not provide sufficient adhesive strength due to fast decomposition and poor resolidification properties, leading to inadequate bonding with textiles.

Innovation Solution

Incorporation of a hydroxyl-functional phosphonate of a specific general formula (I) as a flame lamination additive in polyurethane foam compositions, which enhances bonding with textiles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If polyether polyurethane foam is used as a flame lamination additive, then flame resistance is improved, but adhesion strength to textile deteriorates due to fast decomposition and poor resolidification

Engineering Contradiction:

Improveflame resistanceVSAvoidadhesion strength

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent modifies the chemical structure of phosphorus-containing compounds by introducing hydroxyl-functional phosphonates with specific molecular structures (formula I) to change the decomposition and resolidification parameters of the foam, enabling it to maintain adhesion strength while providing flame resistance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite flame lamination additive system by combining polyol, polyisocyanate, catalyst, and hydroxyl-functional phosphonate in specific formulations, where the phosphonate modifies the foam's chemical composition to achieve both flame resistance and adhesion properties

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If conventional phosphorus containing flame lamination additives are used, then flame resistance is improved, but adhesion strength deteriorates due to poor resolidification properties

Engineering Contradiction:

Improveflame resistanceVSAvoidresolidification properties

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical parameters of flame lamination additives by using hydroxyl-functional phosphonates with specific molecular structures (formula I) that modify the resolidification behavior of the foam, improving both flame resistance and compositional stability during flame exposure

Inventive Principle:

Principle #35Parameter changes

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 hydroxyl-functional phosphonate improves adhesive strength, resulting in better bonding between polyurethane foam and textiles, as demonstrated by increased delamination forces in laminated samples.

Implementation Method 1

Flame lamination additives are used to promote adhesive strength between a substrate (e.g., fabric/textile) and polyurethane foam

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentUS12611843B2Flame lamination additive for polyurethane foam

Publication Date: 2026.04.28 ICL IP AMERICA INC

AI summary

There is provided herein a polyurethane foam-forming composition comprising a hydroxyl-functional phosphonate of the general formula (I): wherein R1-R4 are as described herein. There is also provided a polyurethane comprising the reaction product of the polyurethane foam-forming composition and a process of making a laminated polyurethane comprising laminating a textile to a polyurethane, preferably a polyurethane foam.