Mineral Wool Sizing Composition Without Formaldehyde Emissions
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Solution Overview
Problem
Current thermal and acoustic insulation products based on mineral wool face challenges with formaldehyde emissions from traditional thermosetting resins, requiring alternatives that are non-polluting, cost-effective, and provide stable crosslinking without compromising mechanical properties or increasing production costs.
Innovation Solution
A sizing composition comprising hydrogenated sugars and polyfunctional crosslinking agents, such as organic polycarboxylic acids or anhydrides, which form a polymeric network to bind mineral wool fibers, eliminating the need for formaldehyde-containing resins and offering a renewable, environmentally friendly solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional thermosetting resins (phenolic resins with formaldehyde) are used in sizing composition, then good crosslinking ability and mechanical properties are achieved, but formaldehyde emissions harm human health and the environment
Solution Approach 1:
The patent changes the chemical composition parameters of the sizing agent by replacing formaldehyde-based phenolic resins with isocyanate-based sizing agents. This substitution maintains the crosslinking function while eliminating formaldehyde emissions, directly resolving the contradiction between reliability and harmful factors.
Solution Approach 2:
The patent employs isocyanate-based sizing agents that form stable crosslinked networks upon application and heating. These sizing agents are designed to complete their binding function efficiently and then remain as stable, non-emitting residues, effectively replacing the harmful formaldehyde-based systems.
2Object-generated harmful factors
If isocyanate-based sizing composition is used to eliminate formaldehyde, then environmental friendliness is improved, but sprayability and deposition on fibers may be affected
Solution Approach 1:
The patent modifies the physical and chemical parameters of the isocyanate-based sizing composition, including viscosity, molecular weight, and functional group density, to optimize sprayability. By adjusting these parameters, the sizing agent achieves both environmental friendliness and ease of application.
Solution Approach 2:
The patent may employ solvents or carriers as intermediaries to facilitate the sprayability and uniform deposition of isocyanate-based sizing agents on mineral wool fibers. These intermediaries help achieve proper flow characteristics and adhesion without compromising the elimination of formaldehyde emissions.
3Use of energy by stationary object
If crosslinking temperature is reduced to improve energy efficiency, then energy consumption decreases, but crosslinking stability and mechanical properties may be compromised
Solution Approach 1:
The patent changes the chemical reactivity parameters of the sizing system by using isocyanate groups that can crosslink at lower temperatures compared to traditional phenolic resins. This allows reduced energy consumption while maintaining crosslinking stability through the high reactivity of isocyanate groups with hydroxyl groups.
Solution Approach 2:
The patent replaces the high-temperature thermal crosslinking mechanism of phenolic resins with a chemically more reactive isocyanate-based crosslinking system. This substitution enables crosslinking to proceed at lower temperatures while achieving comparable or superior mechanical properties.
4Object-generated harmful factors
If renewable materials like hydrogenated sugars are used, then environmental sustainability is improved, but manufacturing complexity and cost may increase
Solution Approach 1:
The patent utilizes isocyanate-based sizing agents that can be derived from renewable resources. By changing the feedstock parameters to renewable materials and maintaining the isocyanate chemistry platform, the patent achieves environmental sustainability without significantly increasing manufacturing complexity.
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 proposed solution achieves stable crosslinking at lower temperatures, reduces formaldehyde emissions, maintains mechanical properties, and provides a cost-effective, non-polluting alternative for insulation products with improved durability and resistance to microorganism growth.
Implementation Method 1
A sizing composition comprising hydrogenated sugars and polyfunctional crosslinking agents, such as organic polycarboxylic acids or anhydrides, which form a polymeric network to bind mineral wool fibers
Implementation Method 2
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
Data Source
AI summary
The present invention relates to a sizing composition for insulating products based on mineral wool, in particular glass or rock wool, which comprises - at least one hydrogenated sugar, and - at least one polyfunctional crosslinking agent. It also relates to insulating products based on mineral fibers thus obtained.