Plasterboard Formaldehyde Trapping via Active Methylene Bonding

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Solution Overview

Problem

Formaldehyde emissions from building materials, particularly those containing formaldehyde-based resins, pose health risks due to the inability of existing alternatives to replace these resins effectively without significant cost and quality compromises.

Innovation Solution

A plaster-based material, such as a plasterboard, incorporating compounds like active methylene derivatives, sulphites, and tannins, which covalently bond with formaldehyde, trapping it within the material and preventing re-emission into the air.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If formaldehyde-based resins are used in building materials, then adhesive performance and material quality are improved, but formaldehyde emissions increase causing health risks

Engineering Contradiction:

Improveadhesive performanceVSAvoidformaldehyde emissions

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary substance (formaldehyde trapping agent) that mediates between the formaldehyde-emitting resin and the indoor environment. This agent chemically binds formaldehyde through active methylene groups, preventing its emission while allowing the resin to maintain its adhesive function. The intermediary converts the harmful formaldehyde into a stable bound state.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful formaldehyde emissions into a beneficial trapping mechanism. The formaldehyde that would normally be emitted is instead captured and bound by the trapping agent, transforming a health hazard into a stable chemical complex within the building material.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Object-affected harmful factors

If formaldehyde-free resins are used to reduce emissions, then health risks are reduced, but manufacturing cost and product quality deteriorate

Engineering Contradiction:

Improveformaldehyde emissionsVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent merges the advantages of both approaches: it uses conventional formaldehyde-based resins for cost-effective and high-performance adhesives, while simultaneously incorporating formaldehyde trapping agents to eliminate emissions. This combination achieves both economic viability and health protection.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a composite building material system consisting of the resin-based adhesive combined with formaldehyde trapping agents. This composite structure allows the material to maintain the bonding performance of traditional resins while adding the emission-control functionality of the trapping agent.

Inventive Principle:

Principle #40Composite materials

3Device complexity

If conventional plasterboard is used without formaldehyde trapping agents, then manufacturing simplicity is maintained, but indoor air quality deteriorates due to formaldehyde accumulation

Engineering Contradiction:

Improvematerial composition simplicityVSAvoidindoor air quality

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent modifies the chemical composition parameters of conventional plasterboard by incorporating formaldehyde trapping agents with specific functional groups (active methylene). This parameter change enables the material to actively interact with and neutralize formaldehyde, transforming it from a passive building material to an active air quality management system.

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 plaster-based material effectively reduces formaldehyde levels in indoor air by trapping it, improving air quality without the cost and quality issues associated with existing alternatives.

Implementation Method 1

The agent capable of reacting with formaldehyde is a compound which covalently bonds to formaldehyde

Methodology Applied

Scientific EffectCovalent bonding: Chemical Bonding

Implementation Method 2

an agent capable of trapping formaldehyde chosen from compounds comprising active methylene(s), sulphites, and tannins

Methodology Applied

Scientific EffectChemical absorption: Absorption (physical)

Data Source

PatentEP2327672B1Plaster-based material including an agent capable of trapping formaldehyde.

Publication Date: 2017.03.01 BPB LTD

AI summary

The present invention relates to a plaster-based material which includes an agent capable of trapping formaldehyde, in particular a plasterboard intended for the interior fittings of residential buildings. The agent capable of trapping formaldehyde is chosen from ethylene urea and its derivatives, compounds comprising active methylene(s), sulphites, tannins and their mixtures. Another subject-matter of the invention is the use of the said material for reducing the amount of formaldehyde present in the atmosphere inside residential buildings.