Silane-Modified One-Component Parquet Adhesive
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Solution Overview
Problem
Existing parquet adhesives fail to achieve high dimensional stability due to inadequate tensile shear strength and modulus of elasticity, often containing hazardous substances like isocyanates or relying on solvents and water, which limits their mechanical properties and safety.
Innovation Solution
A silane-modified, one-component, water-, solvent-, and phthalate-free parquet adhesive composed of silane-terminated polyalkylene oxide oligomers, mineral components, desiccants, adhesion promoters, and additives, providing enhanced mechanical properties through specific mixing ratios and surface treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water-based dispersion adhesives are used for parquet bonding, then ease of application is improved, but wood swelling increases and dimensional stability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters by using silane-modified polymeric adhesives with specific molecular weights and silane group densities, replacing traditional water-based dispersions. This chemical parameter change allows the adhesive to cure through moisture reaction rather than water evaporation, eliminating wood swelling while maintaining ease of application
Solution Approach 2:
The invention creates a composite adhesive system combining organic polymeric components with inorganic silane groups. The silane-modified polymer structure integrates both organic flexibility and inorganic crosslinking capability, achieving high dimensional stability while maintaining good application properties
2Stability of the object's composition
If solvent-based adhesives are used to reduce wood swelling, then dimensional stability is improved, but harmful emissions and health risks increase
Solution Approach 1:
The patent changes the adhesive composition from solvent-based to water-free silane-modified polymer system. The adhesive cures through moisture reaction from the air or substrate rather than requiring organic solvents, eliminating VOC emissions while maintaining dimensional stability through silane crosslinking
Solution Approach 2:
The invention replaces the evaporation-based drying mechanism of solvent adhesives with a chemical crosslinking mechanism. The silane groups react with moisture to form a three-dimensional network, providing a non-volatile, environmentally friendly alternative to solvent-based systems
3Strength
If two-component polyurethane adhesives are used to achieve high bond strength, then tensile shear strength is improved, but device complexity and handling difficulty increase
Solution Approach 1:
The patent merges the polymer base and curing agent into a single pre-formulated component. The silane-modified polymer contains both the adhesive matrix and the reactive silane groups in one component, eliminating the need for separate mixing operations while achieving high bond strength through moisture-cured crosslinking
Solution Approach 2:
The adhesive system uses ambient moisture from the air or substrate as the curing agent, eliminating the need for a separate hardening component. The silane groups self-react with available moisture to form crosslinks, providing high strength bonding without the complexity of two-component mixing
4Strength
If high mineral content is added to improve mechanical properties, then modulus of elasticity is improved, but processing viscosity increases
Solution Approach 1:
The patent changes the particle size parameters of the mineral fillers, using fine particles in the range of 0.1-2.0 μm rather than larger particles. This size reduction decreases the viscosity impact while maintaining the reinforcement effect on modulus of elasticity. The silane modification of the polymer matrix also improves compatibility with fine mineral particles
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 adhesive achieves significantly improved tensile shear strength and modulus of elasticity, ensuring high dimensional stability and safety without hazardous substances, with a long open time and easy handling, meeting or exceeding DIN EN standards.
Implementation Method 1
a) 10 to 30 percent by mass of a moisture-reactive silane-terminated polyalkylene oxide binder
Implementation Method 2
The terminal silane groups of the at least one polyakylene oxide oligomer are connected to the oligomeric backbone via urethane and/or urea groups
Implementation Method 3
a suitable desiccant and adhesion promoter
Implementation Method 4
0.3 to 4 percent by mass of a moisture-reactive silane-modified adhesion promoter
Data Source
AI summary
The present invention relates to a silane-modified, one-component, water-, solvent- and phthalate-free parquet adhesive and also to its use for the highly dimensionally stable bonding of parquet, wood floor coverings and wood-based material boards to substrates in interior fitment.