Ammonia-Modified Soy Protein Binder Crosslinking
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Solution Overview
Problem
Existing formaldehyde-free binder compositions for composite fiber products rely heavily on petroleum-based ingredients, and they often have poor gluing strength and water resistance compared to conventional binders.
Innovation Solution
Development of one-part binder compositions that incorporate ammonia-modified soy flour and a crosslinking combination of polymer compounds and crosslinking agents, which actively crosslink to provide a rigid thermoset binder, reducing the need for petroleum-based ingredients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If formaldehyde-free binder compositions use esterification reactions between polycarboxy polymers and alcohols, then environmental benignity is improved, but dependence on petroleum-based ingredients increases
Solution Approach 1:
The patent changes the chemical composition parameters by substituting petroleum-based polycarboxy polymers with protein-based polymers containing carboxyl groups. This parameter change maintains the esterification reaction mechanism while replacing non-renewable ingredients with renewable resources, thereby reducing petroleum dependence while preserving environmental benefits
Solution Approach 2:
The patent creates a composite binder system combining proteins (amino acids with carboxyl groups) with crosslinking agents. This composite approach allows the protein backbone to provide renewable content while crosslinking agents enhance bonding strength and water resistance, simultaneously addressing environmental and performance requirements
2Quantity of substance
If protein-containing adhesives are used as alternatives to petroleum-based binders, then renewable content is improved, but bonding strength and water resistance deteriorate
Solution Approach 1:
The patent introduces crosslinking agents as intermediary substances that mediate between the protein components and the substrate. These crosslinking agents form additional covalent bonds with the protein's amino, carboxyl, and hydroxyl groups, creating a reinforced network that significantly enhances bonding strength and water resistance while maintaining high renewable content
Solution Approach 2:
The patent develops a composite system where proteins serve as the renewable backbone and crosslinking agents provide structural reinforcement. This composite material approach combines the environmental benefits of proteins with the performance advantages of crosslinked networks, achieving both high renewable content and superior bonding properties
3Strength
If traditional formaldehyde-based binders are used, then bonding strength is improved, but harmful factors increase
Solution Approach 1:
The patent eliminates formaldehyde entirely from the binder composition, converting the harmful formaldehyde-based crosslinking mechanism into a beneficial protein-based esterification and crosslinking system. The protein's natural amino, carboxyl, and hydroxyl groups provide multiple crosslinking pathways that achieve comparable or superior bonding strength without formaldehyde exposure risks
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 binder compositions achieve improved bonding strength and water resistance, comparable to or exceeding those of conventional petroleum-based binders, while being environmentally benign and reducing dependence on non-renewable resources.
Implementation Method 1
at least one protein and a crosslinking combination of two or more crosslinking compounds, where the at least one protein and the crosslinking compounds are all crosslinkable with each other
Implementation Method 2
esterification reactions between carboxylic acid groups in polycarboxy polymers and hydroxyl groups in alcohols
Data Source
Figure 1
AI summary
One-part binder compositions are described that may include a protein and a crosslinking combination. The crosslinking combination may include at least a first crosslinking compound and a second crosslinking compound. The first and second crosslinking compounds are individually crosslinkable with each other and with the protein. Examples of the protein include soy protein. Fiber products and methods of making the fiber products are also described. The fiber products may include organic fibers, inorganic fibers, or both, in a cured thermoset binder based on solutions of the one-part binder compositions.