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US 11,441,275 B2Granted
Safety surface materials
OwnerWilliam H. McGrath, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A safety surface material for a playground facility employing a monolithically mixed and troweled Thermoplastic Olefin (TPO) polypropylene/polyurethane cushion course base layer—which, for water park/spray park use is overlain by a Thermoplastic Rubber wear course top.
Claims12
A recreational facility surfacing material comprising:
- a cushion course base layer of foam polypropylene granules within an outer skin layer of non-foamed polypropylene in a mixture with Methylene Diphenyl Diisocyanate (MDI) urethane binder or Hexamethylene Diisocyanate (HDI) urethane binder;
- and
- a wear course top layer of granulated or round Thermoplastic Rubber (TPR), Ethylene Polypropylene Diene Monomer Rubber (EPDM), or Thermoplastic Vulcanized Rubber (TPV) mixed with one of a Methylene Diphenyl Diisocyanate and Hexamethylene Diisocyanate urethane binder overlying said cushion course base layer.
A recreational facility surfacing material comprising:
- a cushion course base layer of foam urethane granules within an outer skin layer of non-foamed urethane in a mixture with Methylene Diphenyl Diisocyanate (MDI) urethane binder or Hexamethylene Diisocyanate (HDI) urethane binder;
- and
- a wear course top layer of granulated or round Thermoplastic Rubber (TPR), Ethylene Polypropylene Diene Monomer Rubber (EPDM), or Thermoplastic Vulcanized Rubber (TPV) mixed with one of a Methylene Diphenyl Diisocyanate and Hexamethylene Diisocyanate urethane binder overlying said cushion course base layer.
A recreational facility surfacing material comprising:
- a cushion course base layer of foam thermoplastic olefin granules within an outer skin layer of non-foamed thermoplastic olefin in a mixture with Methylene Diphenyl Diisocyanate (MDI) urethane binder or Hexamethylene Diisocyanate (HDI) urethane binder;
- and
- a wear course top layer of granulated or round Thermoplastic Rubber (TPR), Ethylene Polypropylene Diene Monomer Rubber (EPDM), or Thermoplastic Vulcanized Rubber (TPV) mixed with one of a Methylene Diphenyl Diisocyanate and Hexamethylene Diisocyanate urethane binder overlying said cushion course base layer.
Dependencies are inferred from the claim text.