Cellulosic Composite Binder Using Amine Salt and Aldehyde
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Solution Overview
Problem
Formaldehyde-based resins used in composite wood products exhibit unsatisfactory physical properties, such as low internal bond strength and moisture susceptibility, while alternative isocyanate-based resins are expensive, reactive with water, and pose health and environmental concerns, limiting their commercial utility.
Innovation Solution
A formaldehyde-free cellulosic composite using a binder composition comprising an amine salt of an inorganic acid, such as phosphoric acid, combined with an aldehyde or ketone, which forms a water-insoluble polymer upon curing, offering improved bonding strength and sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If formaldehyde-based resins are used as binders in composite wood products, then the manufacturing process is simple and cost-effective, but the physical properties are unsatisfactory including low internal bond strength and moisture susceptibility
Solution Approach 1:
The patent changes the chemical composition parameters of the binder by using a mixture of amine salt of inorganic acid and aldehyde/ketone instead of formaldehyde-based resins. This parameter change maintains ease of manufacture while significantly improving physical properties including internal bond strength and moisture resistance.
Solution Approach 2:
The patent employs a composite binder system combining amine salt of inorganic acid with aldehyde or ketone components. This composite material approach replaces单一 formaldehyde-based resin, achieving both manufacturing feasibility and superior physical properties through synergistic effects of multiple components.
2Reliability
If isocyanate-based resins are used as alternatives to formaldehyde-based resins, then improved physical properties are achieved, but the cost increases and health and environmental concerns arise
Solution Approach 1:
The patent uses readily available, inexpensive amine salts of inorganic acids combined with common aldehydes or ketones as binder components. These materials are cheaper than isocyanate-based resins and eliminate the health and environmental hazards associated with isocyanates, while still providing improved physical properties.
Solution Approach 2:
The patent converts the potentially harmful characteristics of traditional resins into benefits by using naturally occurring or readily available amine salts and aldehyde/ketone combinations. This approach eliminates toxic isocyanate components while maintaining or improving physical properties, turning a harmful alternative into a safe and superior solution.
3Strength
If isocyanate-based resins are used to improve bonding strength, then internal bond strength increases, but the resins are highly reactive with water limiting shelf-life and commercial utility
Solution Approach 1:
The patent uses amine salts of inorganic acids as intermediary compounds that react with aldehyde or ketone components to form the final binder polymer. This intermediary approach provides sufficient bonding strength while avoiding the direct use of highly water-reactive isocyanates, thereby maintaining shelf-life and commercial viability.
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 solution provides a robust, durable, and sustainable composite wood product with reduced organic content, faster cure time, and lower energy consumption, addressing the limitations of traditional resins and enhancing environmental and health safety.
Implementation Method 1
a binder composition comprising a mixture of an amine salt of an inorganic acid with an aldehyde or ketone, which upon curing forms a water-insoluble polymer
Data Source
AI summary
Provided is a cellulosic composite comprised of cellulosic material and a binder. The binder comprises an aldehyde or ketone and amine salt of an inorganic acid. The composition when mixed with cellulosic material and cured forms a cellulosic composite.