Aqueous Bioadhesive Composition Eliminates Formaldehyde Emission
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Solution Overview
Problem
There is a need for a bioadhesive that does not use harmful components such as formaldehyde, isocyanate polymers, polyamide epichlorohydrin, styrene, glyoxal, phenoplasts, heavy metals, or halogens, and can be produced without crosslinkers, while maintaining effective bonding properties and being environmentally friendly.
Innovation Solution
An aqueous-based composition comprising a plant meal with 30-80% protein content, dicarboxylic or tricarboxylic acids, carbamide, and a pH-modifying amino derivative, which is dispensed at temperatures between 4°C and 100°C, eliminating the need for crosslinkers and providing excellent bonding properties without formaldehyde emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If crosslinkers such as polyamide epichlorohydrin, isocyanate polymers, phenoplasts, or glyoxal are used to achieve effective bonding properties, then adhesive strength is improved, but environmental harm and health risks increase due to formaldehyde emission and toxic components
Solution Approach 1:
The invention extracts and removes harmful crosslinkers (polyamide epichlorohydrin, isocyanate polymers, phenoplasts, glyoxal) from the adhesive composition, replacing them with a safe alternative system based on plant proteins, polysaccharides, and natural crosslinking agents that do not emit formaldehyde or toxic substances while maintaining bonding effectiveness
Solution Approach 2:
The invention changes the chemical parameters of the adhesive system by using plant proteins with specific amino acid compositions and polysaccharides with controlled molecular weights, along with natural crosslinking agents, to achieve bonding without the harmful parameters associated with traditional synthetic crosslinkers
2Reliability
If traditional synthetic adhesives are used to ensure reliable bonding, then adhesive performance is improved, but environmental friendliness deteriorates
Solution Approach 1:
The invention converts naturally occurring plant proteins and polysaccharides, which would otherwise be considered simple agricultural byproducts, into high-performance bioadhesives through controlled processing and natural crosslinking, transforming low-value materials into environmentally friendly bonding solutions that match or exceed synthetic adhesive performance
Solution Approach 2:
The invention enables the adhesive system to self-crosslink through natural chemical reactions between plant protein amino groups and aldehydes from sugar cane molasses or other natural sources, eliminating the need for harmful synthetic crosslinkers while maintaining reliable bonding performance
3Strength
If complex crosslinking agents and multiple chemical components are used to achieve effective bonding, then adhesive strength is improved, but manufacturing complexity increases
Solution Approach 1:
The invention merges multiple functions into a single adhesive composition: plant proteins provide the base adhesive matrix, polysaccharides enhance viscosity and bonding, and natural crosslinking agents provide curing functionality, all in one formulation that simplifies manufacturing compared to multi-step processes requiring separate addition of crosslinkers and catalysts
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 achieves high mechanical stability, storage, and bonding properties without the use of crosslinkers or harmful chemicals, reducing environmental impact and formaldehyde emission, suitable for use in composite materials like lignocellulosic boards and laminated products.
Implementation Method 1
The adhesive component is obtained upon causing an alkanolamine to react with at least one polycarboxylic acid or anhydride at high temperature. Subsequently, a soy protein is added to the adhesive component of the reaction of the alkanolamine and the acid or anhydride
Implementation Method 2
The adhesive component is obtained upon causing an alkanolamine to react with at least one polycarboxylic acid or anhydride at high temperature
Data Source
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AI summary
Aqueous based composition, method for obtaining the same and use of the composition as a bioadhesive. The invention relates to an aqueous based composition for the use thereof as a bioadhesive as well as to a method for obtaining the same, at the same time it relates to the composite which contains the composition of the invention and a lignocellulosic material or rock wool or paper or glass fiber or plastic or cork and to the products such as for example boards made with the composite of the invention. These compositions have demonstrated good stability of dispersion, an excellent rheological behavior, a high resistance to the precure process (for example during the drying phase of the fiber cast in the manufacturing of MDF board) and all of which without using products unsuitable from an environmental point of view such as amine epichlorohydrins, isocyanates, phenolates, biocides, etc.