Binders
MDI Prepolymer and PU Binder Systems
PTU supplies and develops polyurethane binder systems used to bond recovered, recycled and natural materials into new products and engineered surfaces.
PTU one-component, moisture-curing MDI-based prepolymers can be used to bind rubber crumb and recycled flexible polyurethane foam into rebonded products. Applications include sports surfaces, impact-absorbing playground surfaces and cushioning materials.
PTU also supplies two-component polyurethane binder systems for bonding selected aggregates and stone into permeable paving, landscaping products and engineered erosion-control applications.
By enabling loose or recovered materials to be consolidated into useful products, PU binder systems can support material recovery and the development of applications that make use of recycled feedstocks.
Product Features
Rebonded Rubber Products
PU binders can be used to consolidate rubber crumb into resilient, durable surfaces for applications such as sports flooring and impact-absorbing playground surfaces. Finished products can be designed to provide appropriate cushioning and slip resistance, subject to the specific product design and applicable safety requirements.
Recycled Flexible Foam
Selected recovered flexible PU foam can be processed into foam chips and bonded with MDI-based PU binders to produce rebonded foam products. Applications can include under-carpet cushioning, acoustic materials and other products where recycled foam content is suitable.
Solvent-Free Formulation Options
One-component moisture-curing MDI prepolymer systems can be formulated without added organic solvents, supporting applications where solvent-free processing is preferred. Emissions performance depends on the specific formulation and processing conditions.
Permeable Paving
Two-component PU binder systems can be used to bind selected aggregates and stone into permeable paving materials. The open structure of suitable finished products allows water to pass through the pavement, which can contribute to surface water management and infiltration.
Erosion and Coastal Applications
Selected PU elastomeric binder systems can be used to consolidate suitable crushed rock and aggregate into engineered erosion-control structures and revetment systems. The resulting open-pore construction can allow water movement through the structure while helping to stabilise the aggregate. Performance is dependent on the binder, aggregate, design and site-specific engineering requirements.
Supporting Material Recovery and Reuse
PU binder technology can help convert recovered materials such as flexible foam and end-of-life tyre rubber into useful secondary products, reducing the need for some virgin raw materials and supporting more circular approaches to material use.
Application-Specific Formulation
PTU works with customers to select and develop binder systems according to the required substrate, aggregate or recycled material, processing method, cure profile and finished-product performance requirements.