Formable orthopedic casts and splints
AssigneeJohnson & Johnson Products, Inc.
InventorRichard Green
Life of this patent
Estimating the term…
Abstract
A cast material comprising a filled crystalline polyurethane is disclosed. The filler is present in an amount of from 30% to 60% by weight composition. The filler comprises from 20% to 60% by weight of calcium metasilicate fibers and from 40.degree. C. to 85.degree. C. by weight of silica.
Claims7
A thermoplastic casting material having a softening temperature of from 45.degree. C. to 85.degree. C. and capable of recrystallizing to form a rigid self supporting cast within 10 minutes of being softened comprising from 40% to 70% by weight of a crystalline polyurethane polymer and 30% to 60% of a filler, said filler comprising from 20% to 60% of wollastonite calcium metasilicate fibers having a length-to-diameter ratio of from 3:1 to 20:1 and from 40% to 80% of novacite silica in the form of platy particles having a diameter of from 1 to 10 microns.
Dependencies are inferred from the claim text.