Lignin Binder Composition for High-Pressure Laminates
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Solution Overview
Problem
Current lignin-based resins are not suitable for high-pressure laminates due to their inability to replace synthetic phenol effectively, lacking the necessary properties for applications such as high-pressure laminates, continuous pressure laminates, rock wool, insulation wool, oriented strand board, panel surface films, or plywood surface films.
Innovation Solution
A method involving the use of crushed lignin agglomerates with a particle size of at least 90 weight-% of 10 mm or less, dissolved in an aqueous solvent composition with at least 95 weight-% dissolution within 60 minutes, and subsequent heating with a crosslinking agent and phenol compound at 60-150 °C for polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If lignin is used to replace synthetic phenol in phenolic resins, then environmental friendliness is improved, but the suitability for high-pressure laminates deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the particle size of lignin agglomerates (at most 10 mm, with 90 weight-% criterion) and optimizing the dissolution process (95 weight-% dissolution within 60 minutes). These parameter adjustments transform the lignin properties to achieve both environmental benefits and technical performance required for high-pressure laminates
Solution Approach 2:
The patent creates a composite binder composition by combining lignin with formaldehyde and additional phenolic compounds. This composite approach allows the lignin-phenol-formaldehyde resin to achieve the necessary performance characteristics for high-pressure laminates while maintaining the environmental advantage of reduced synthetic phenol content
2Productivity
If lignin agglomerates are used as raw material, then dissolution speed is improved, but particle size control becomes more difficult
Solution Approach 1:
The patent applies preliminary action by pre-crushing the lignin agglomerates to a controlled size distribution (90 weight-% at most 10 mm) before the dissolution step. This preliminary size reduction enables rapid dissolution (95 weight-% within 60 minutes) while maintaining control over the final particle characteristics in the binder composition
3Object-affected harmful factors
If higher phenol replacement is achieved, then environmental friendliness is improved, but resin properties for specific applications deteriorate
Solution Approach 1:
The patent applies universality by formulating a binder composition that can serve multiple applications including high-pressure laminates, continuous pressure laminates, rock wool, insulation wool, oriented strand board, and plywood surface films. The composition achieves this multi-functionality by optimizing the lignin-phenol-formaldehyde system to provide suitable properties across different application requirements while maintaining high phenol replacement levels
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
This method results in a binder composition with improved solubility and properties suitable for various applications, including high-pressure laminates, by reducing the presence of hard lignin particles and enhancing the dissolution and polymerization process, leading to a more environmentally friendly and effective adhesive.
Implementation Method 1
dissolving the provided raw material into an aqueous solvent composition, wherein at least 95 weight-% of the total amount of the raw material provided into the aqueous solvent composition is dissolved into the aqueous solvent composition within at most 60 minutes
Implementation Method 2
heating the composition formed in step ii) at a temperature of 60 - 150 °C in the presence of crosslinking agent and compound selected from the class of phenols for polymerizing the raw material, the compound selected from the class of phenols, and the crosslinking agent
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
A method for producing a binder composition is disclosed. The method may comprise: i) providing a raw material of crushed lignin agglomerates, wherein at least 90 weight-% of the crushed lignin agglomerates have a particle size of at most 10 mm; ii) dissolving the provided raw material into an aqueous solvent composition, wherein at least 95 weight-% of the total amount of the raw material provided into the aqueous solvent composition is dissolved into the aqueous solvent composition within at most 60 minutes; and iii) heating the composition formed in step ii) at a temperature of 60 - 150 °C in the presence of crosslinking agent and compound selected from the class of phenols for polymerizing the raw material, the crosslinking agent, and the compound selected from the class of phenols.