High Solids PAE Resin Adhesive for Wood Composites
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current adhesives based on polyamidoamine-epihalohydrin (PAE) resins face limitations in achieving high solids content while maintaining stability and low viscosity, which is essential for effective bonding in composite materials, particularly in wood-based products, as they often suffer from high viscosity and poor aging stability at elevated temperatures.
Innovation Solution
Development of high solids PAE resins with a solids content of greater than 40% and a combination of PAE and protein sources, such as soy protein, that exhibit improved aging stability and low viscosity, enabling the creation of adhesives with at least 45% solids content, suitable for use in wood-containing composite materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PAE resins with high solids content are used, then adhesive strength and productivity are improved, but viscosity increases and aging stability deteriorates
Solution Approach 1:
The patent changes the molecular weight parameter of the PAE resin to achieve the desired balance. Specifically, it uses PAE resins with molecular weights between 500-5000 g/mol, which is lower than conventional resins. This parameter change allows the resin to maintain low viscosity and good aging stability even at high solids content (40-70%), thereby resolving the contradiction between productivity and stability.
2Productivity
If PAE resins with high solids content are used, then adhesive strength is improved, but viscosity increases
Solution Approach 1:
The patent changes the molecular weight parameter of the PAE resin to achieve the desired balance. Specifically, it uses PAE resins with molecular weights between 500-5000 g/mol, which is lower than conventional resins. This parameter change allows the resin to maintain low viscosity and good aging stability even at high solids content (40-70%), thereby resolving the contradiction between productivity and stability.
3Ease of operation
If conventional low molecular weight PAE resins are used, then viscosity is reduced, but aging stability deteriorates
Solution Approach 1:
The patent optimizes the molecular weight parameter within a specific range (500-5000 g/mol) rather than simply minimizing it. This optimized parameter range achieves the desired balance between viscosity and aging stability, resolving the contradiction between ease of operation and stability.
4Productivity
If high solids adhesive formulations are used, then productivity is improved, but manufacturing precision deteriorates due to poor stability
Solution Approach 1:
The patent changes the molecular weight parameter of the PAE resin to a specific range (500-5000 g/mol) that enables high solids content formulations to maintain good aging stability. This parameter change ensures that adhesive properties remain consistent during storage and application, thereby resolving the contradiction between productivity and manufacturing precision.
Data Source
AI summary
The invention is directed to composition, preparation and use of composite materials based on an adhesive with so?ds levels above 45% by weight that contain stable pojyamidoamine-epihalohydrin resins (PAE resins) of solids greater than 40% where the relative high solids of the PAE enables the high solids content of the adhesive. Furthermore, at least 45% of the solids portion of the adhesive is made up of a combination of the solids of the PAE resin and the solids of the protein source. The invention is also directed an adhesive comprised of the PAE in combination with a soy protein source. The invention is also directed toward use of the adhesive in composite materials and in particular wood containing composite materials, and more specifically wood fiber or particle based composites.