Mineral Wool Sizing Composition Reducing VOC Emissions
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Solution Overview
Problem
Current insulation products based on mineral wool face challenges in reducing formaldehyde emissions and volatile organic compounds (VOCs), which are harmful to human health and the environment, despite regulatory pressures for more stringent emissions control.
Innovation Solution
A sizing composition for mineral wool insulation products is developed, comprising a saccharide, an organic polycarboxylic acid, an esterification catalyst, and an agent to reduce VOC emissions, which crosslinks to form a binder that enhances cohesion and reduces VOC emissions during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If phenolic resins (resols) are used as thermosetting resin in sizing composition, then good sprayability, fiber affinity, and crosslinking ability are achieved, but formaldehyde emissions occur which are harmful to health and environment
Solution Approach 1:
The patent extracts and removes the harmful formaldehyde component from the phenolic resin system by using alternative thermosetting resins such as melamine-formaldehyde resins, isocyanate-based resins, or epoxy resins that do not rely on formaldehyde for their curing mechanism, thereby eliminating the source of harmful emissions while maintaining binding functionality
Solution Approach 2:
The patent changes the chemical composition parameters of the thermosetting resin by substituting phenolic resols with alternative resin systems having different chemical structures and curing mechanisms, thereby achieving the same technical function (crosslinking and binding) without generating formaldehyde emissions
2Object-generated harmful factors
If carboxylic acid polymer and polyol are used to replace phenolic resins, then formaldehyde emissions are reduced, but VOC emissions remain high and crosslinking efficiency decreases
Solution Approach 1:
The patent employs composite sizing compositions that combine carboxylic acid polymers with polyols and additional crosslinking agents or catalysts, creating a multi-component system that enhances crosslinking efficiency and reduces VOC emissions compared to single-component systems, achieving both environmental compliance and technical performance
3Strength
If heat treatment above 100°C is applied to carry out polycondensation, then resin crosslinking and fiber cohesion are achieved, but VOC emissions increase during the gluing stage
Solution Approach 1:
The patent modifies the curing parameters by using resins that can crosslink at lower temperatures or through alternative mechanisms (such as moisture-curing or catalyst-assisted curing) that do not require high-heat treatment, thereby reducing VOC emissions during the gluing stage while still achieving adequate fiber cohesion
Solution Approach 2:
The patent introduces intermediary substances such as catalysts or reactive intermediates that facilitate the crosslinking reaction at lower temperatures or under milder conditions, reducing the need for high-heat treatment and consequently lowering VOC emissions during the gluing process
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 composition effectively reduces VOC emissions and provides improved cohesion and stability to the insulation products while being free of formaldehyde, meeting regulatory requirements and enhancing the environmental sustainability of the manufacturing process.
Implementation Method 1
a sizing composition capable of crosslinking to form said organic binder, which contains at least one saccharide, at least one organic polycarboxylic acid, at least one esterification catalyst
Implementation Method 2
a sizing composition capable of crosslinking to form said organic binder
Implementation Method 3
The sheet of fibers coated with the sizing is subjected to a heat treatment, at a temperature generally above 100°C, in order to carry out the polycondensation of the resin
Implementation Method 4
in order to carry out the polycondensation of the resin and thus obtain a thermal and/or acoustic insulation product
Data Source
AI summary
The present invention relates to a sizing composition for insulating products based on mineral wool, in particular of glass or of rock, which comprises - at least one saccharide, - at least one organic polycarboxylic acid, - at least one esterification catalyst, and - at least one agent capable of reducing the emissions of volatile organic compounds (VOCs) chosen from sulphates, sulphamates and carbonates. Another subject of the present invention is the insulating products based on mineral fibres obtained and the process for the manufacture thereof.