Composite Cellulosic Binder Composition for Low-VOC Fire Resistance
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Solution Overview
Problem
Conventional binders used in composite cellulosic products emit volatile organic compounds (VOCs) and increase flammability, posing risks of fire and damage in buildings.
Innovation Solution
A binder comprising magnesium oxide, water, and magnesium chloride, with a weight ratio of 2.2:1 to 8.5:1, is used to create a composite cellulosic product, which reduces VOC emissions and enhances fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional binders (polyisocyanate resin, polyurea resin, formaldehyde-based resin) are used to bond cellulosic material, then the composite cellulosic product achieves adequate bonding strength, but the binder emits volatile organic compounds (VOCs) and increases flammability
Solution Approach 1:
The invention changes the chemical composition parameters of the binder by using magnesium oxide, water, and magnesium chloride in specific weight ratios (MgO:MgCl2 from 2.2:1 to 8.5:1, MgO:water from 1:2 to 1:8). This parameter change transforms the binder from conventional organic resins to an inorganic salt-based system that cures to form magnesium oxychloride, eliminating VOC emissions and reducing flammability while maintaining bonding strength
Solution Approach 2:
The invention creates a composite binder system combining magnesium oxide, water, and magnesium chloride that cures to form a magnesium oxychloride matrix. This composite inorganic binder replaces conventional organic resin binders, providing both bonding functionality and fire resistance while eliminating harmful VOC emissions
2Ease of manufacture
If conventional binders are used, then the composite cellulosic product can be manufactured with standard processes, but the binder is combustible and does not decrease flammability of the product
Solution Approach 1:
The invention changes the fire resistance parameter by substituting combustible organic resins with non-combustible inorganic magnesium oxychloride binder. The specific weight ratios of MgO (1 to 8 parts), MgCl2 (0.12 to 0.45 parts), and water (2 to 8 parts) create a binder that cures to a fire-resistant matrix, transforming the product from flammable to fire-resistant while maintaining ease of manufacture
3Device complexity
If the weight ratio of magnesium oxide to magnesium chloride is outside the range of 2.2:1 to 8.5:1, then the binder formulation is simpler, but the binder does not achieve optimal curing and bonding performance
Solution Approach 1:
The invention optimizes the weight ratio parameters of MgO to MgCl2 (2.2:1 to 8.5:1) to achieve optimal curing performance. This parameter range ensures proper stoichiometry for magnesium oxychloride formation, providing reliable bonding strength and fire resistance. The formulation includes additional parameters (MgO:water ratio of 1:2 to 1:8, MgCl2:water ratio of 1:5 to 1:20) that work together to optimize the curing 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 new binder system effectively minimizes VOC emissions and improves the fire resistance of composite cellulosic products, making them safer for construction applications.
Implementation Method 1
the binder can include a mixture formed by combining magnesium oxide, water, and magnesium chloride
Implementation Method 2
allowing the mixture to set for a time period sufficient to allow the binder to at least partially cure
Data Source
AI summary
Composite cellulosic products and processes for making same. In some embodiments, the composite cellulosic product can include a plurality of cellulosic substrates and an at least partially cured binder. Prior to curing, the binder can include a mixture formed by combining magnesium oxide, water, and magnesium chloride. A weight ratio of the magnesium oxide to the magnesium chloride in the binder can be at least 2.2:1 to 8.5:1.