Starch-Modified Urea-Formaldehyde Binders for Non-Woven Mats

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Solution Overview

Problem

Fiber reinforced composites bonded with neat urea-formaldehyde (UF) resin are often brittle, leading to processing and product performance issues. Conventional latex modifiers improve flexibility but are expensive, petroleum-based, and non-sustainable.

Innovation Solution

Developing binder compositions that include UF resin and starch as a modifier, with starch concentrations ranging from 1 wt.% to 10 wt.%, to enhance the tensile and tear strength of fiber reinforced composites while using more sustainable and renewable materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If neat urea-formaldehyde resin is used as binder, then cost is reduced and simplicity is improved, but flexibility and strength deteriorate

Engineering Contradiction:

Improvebinder simplicityVSAvoidcomposite flexibility

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The patent combines UF resin with starch modifier to create a composite binder system. The starch component (1-10 wt%) provides flexibility and toughness while the UF resin provides binding strength, achieving synergistic effects that overcome the brittleness of neat UF resin.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical composition parameters of the binder by incorporating starch at specific concentrations (1-10 wt%). This parameter change transforms the binder from a brittle neat UF resin to a flexible composite system with optimized mechanical properties.

Inventive Principle:

Principle #35Parameter changes

2Strength

If conventional latex modifiers are used to improve flexibility, then composite strength is improved, but binder cost increases significantly

Engineering Contradiction:

Improvecomposite flexibilityVSAvoidbinder cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces expensive petroleum-based latex modifiers with inexpensive starch, a renewable resource. Starch provides comparable or superior flexibility enhancement at a fraction of the cost of conventional latex modifiers like polyvinyl acetate or styrene-butadiene.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent changes the chemical basis of the modifier from petroleum-based latex to starch-based polymer, achieving similar mechanical property improvements with significantly lower material cost and enhanced sustainability.

Inventive Principle:

Principle #35Parameter changes

3Strength

If conventional petroleum-based modifiers are used, then composite performance is improved, but environmental sustainability deteriorates

Engineering Contradiction:

Improvecomposite performanceVSAvoidenvironmental sustainability

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the essential function of petroleum-based modifiers (flexibility enhancement) and achieves it through starch, a renewable biological resource. This eliminates dependence on non-renewable petroleum while maintaining or improving composite performance.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent creates a bio-based composite binder system combining UF resin with starch modifier, replacing petroleum-based components with renewable resources. This achieves similar mechanical performance while improving environmental sustainability and reducing carbon footprint.

Inventive Principle:

Principle #40Composite materials

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 starch-modified UF resin composites exhibit improved hot/wet tensile and tear strength, outperforming composites made with petroleum-based modifiers, and offer a more sustainable and cost-effective solution.

Implementation Method 1

modifying UF resin with conventional latexes, such as polyvinyl acetate, vinyl acrylic, or styrene-butadiene latexes. Modifying UF resin with conventional latexes improves the flexibility of fiber reinforced composites

Methodology Applied

Scientific EffectPolymer modification:

Implementation Method 2

Thermoset urea-formaldehyde (UF) resins are commonly used as binders for fiber reinforced composites

Methodology Applied

Scientific EffectChemical bonding: Chemical Bonding

Data Source

PatentUS20250129244A1Modified urea-formaldehyde binders for non-woven fiber glass mats

Publication Date: 2025.04.24 JOHNS MANVILLE CORP

AI summary

A method of forming a binder composition includes providing a urea-formaldehyde resin and combining one or more starch compounds with the urea-formaldehyde resin to form a starch modified urea-formaldehyde resin. The one or more starch compounds may be combined with the urea-formaldehyde resin so that the starch modified urea-formaldehyde resin includes about 1 wt. % to about 10 wt. % of the one or more starch compounds.