Material family
Polyurethane dispersions
Waterborne polyurethane binders for evaluating adhesion, flexibility and film resistance.
Role in the system: Formation of a flexible protective film.
Selection on request
RAW MATERIALS FOR INDUSTRY
Adhesives: PU and waterborne dispersions
Reactive PU adhesives and waterborne dispersion adhesives are distinct technologies. Components are selected after the process is defined.
Technical challenges
- Select the technology for the substrate pair
- Define application, assembly and cure
- Test joint strength and aging
What to include in your brief
- Materials, preparation and joint geometry
- Open time, pressing and curing conditions
- Required resistance and application restrictions
Technology approaches
- 1K moisture-curing PU adhesives: a ready-to-use prepolymer reacts with moisture. Selection requires humidity, substrate and curing conditions.
- 2K reactive PU adhesives: components are mixed before application. Ratio, mixing quality and working time follow the selected system’s documentation.
- Waterborne dispersion adhesives: select the binder type and bonding process separately. For PUD, confirm whether heat activation and a compatible crosslinker are needed.
Technical insights: Bostik · 1K PU ↗, Bostik · 2K PU ↗, Covestro · PUD ↗
Components to discuss
Material family
Vinyl acetate-ethylene dispersions
Waterborne polymer bases for adhesives; substrates and resistance require grade validation.
Role in the system: Formation of an adhesive layer as water is removed.
Selection on request
Material family
Polyvinyl acetate dispersions
Waterborne adhesive binders for evaluating joints between porous substrates.
Role in the system: Bonding surfaces with a drying polymer layer.
Selection on request
Material family
Tackifier resins
Resins for adjusting initial tack and adhesive viscoelastic behavior.
Role in the system: Modification of polymer-base tack.
Selection on request
Material family
Polyether polyols
Polyol components for adjusting flexibility and reaction behavior of PU systems.
Role in the system: Polyol part of the polyurethane reaction.
Selection on request
Material family
Polyester polyols
Polyols with backbone selection based on mechanical properties and service environment.
Role in the system: Reactive polyol base.
Selection on request
Material family
Polyisocyanates
Reactive PU components. The exact grade and handling conditions must be checked before an offer.
Role in the system: Isocyanate crosslinking component.
Selection on request
Material family
PU catalysts
Components for adjusting reaction rates, without a universal addition recommendation.
Role in the system: Control of polyurethane reaction kinetics.
Selection on request
Component compatibility and final properties require document review and trials. This component list is not a formulation.
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