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Processes

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We recognize that no single modifier or system provides the optimum solution
in all applications. Our technology efforts have been directed to developing
processes that maximize the interactions between polymers and asphalt using;

  • Elastomeric polymers
  • Plastomeric polymers and
  • Combinations of elastomers and plastomers

Polyphalt is unique in its ability to stabilize these polymers in the asphalt creating a
polymer modified asphalt that behaves essentially like a homogeneous single phase system.
This polymer-asphalt compatibility is a hallmark of our technology.

The core technologies are;

Polyphalt process

Type of modification

EPx™ SBS and polyethylene, (polyethylene can be recycled stock)
ELx™ SBS polymer
SPx™ Polyethylene polymer (virgin or recycled)
DVx™ Crumb rubber (recycled tire rubber)
DVx-p Crumb rubber and polyethylene
DVx-e Crumb rubber and SBS

 

SPx™ was the world's first process for stabilizing plastics in asphalt. Using a steric
stabilization process each plastic particle is surrounded by a stabilizing polymer sheath.
This sheath is made of polymers with a high degree of elasticity and excellent adhesive
properties. An added benefit is the steric stabilizer acts like emulsifier creating
polyethylene particles one micron or less. This is even smaller than high shear milling
alone can achieve and contributes to the end product stability. Each of the Polyphalt
technologies utilize this core process.

EPx™ takes the advantage of SPx™ and reacts SBS and polyethylene to create an
entirely new polymer modified asphalt. The elastomer and plastomers are co-reacted
in-situ to form an interpenetrating polymer network, which is fully compatibilized in the
rubberized bituminous matrix. Combining SBS and polyethylene creates a polymer
modified asphalt that offers toughness, high modulus and high elastic recovery.
During construction, the plastomeric material reduces the tackiness of the binder
and improves hot mix compaction.

DVx™    transforms recycled rubber from an inert filler (often the case in conventional
rubberized asphalt products) to an active asphalt modifier. The result of the selective
devulcanization which is the basis of the process, produces a highly stable, fully
dispersed product with many of the performance characteristics of virgin rubber.

   

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