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AssigneeTyndale Plains-Hunter, Ltd.
InventorFrancis E. Gould
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Polyurethane polymers characterized by a molecular weight above 6,000 and having lactone groups and hydroxyl groups in the polymer backbone are prepared by reacting a mixture of polyols, a polyfunctional lactone and a polyfunctional isocyanate proportioned so as to provide the desired polymer properties. The product is soluble in alkaline solutions and may be used for light sensitive photographic layers on films, paper or glass; in drug delivery systems, as burn dressings, in body implants such as vascular prosthesis, in molding compositions, and in the manufacture of catheters. The novel polymers also find use in the manufacture of artificial finger nails, finger cots, adhesives, and in protective and hdyrostatic drag resistant coatings. The water absorptivity of the polyurethane lactone polymers is above 10%, preferably in the range of about 20% to 60%, and these polymers may range in their physical properties from rigid solids to completely gel-like high water absorptive polymers. The polymers of the present invention can provide a leachable substrate wherein the leaching agent may be water, gases, alcohols, esters and body fluids, e.g., animal or human.
A hydrophilic polyurethane polymer comprising the reaction product of:
A surgical suture comprising a hydrophilic polyurethane polymer obtained by reacting:
A burn dressing comprising a hydrophilic polyurethane polymer obtained by reacting:
A surgical implant comprising a solid hydrophilic polyurethane polymer obtained by reacting:
An intrauterine device comprising a hydrophilic polyurethane polymer obtained by reacting:
A canula, the walls of which are formed of a hydrophilic polyurethane polymer obtained by reacting:
A canula woven in textile fiber in the form of a tube having external and internal walls, at least one wall of which is coated with a film of a hydrophilic polyurethane polymer obtained by reacting:
A vascular prosthesis comprising textile strands woven in the form of a tube;
A method of controlling dehydration in humans and animals which comprises the oral administration of a hydrophilic polyurethane polymer obtained by reacting:
An oral delivery system comprising a pharmacologically active agent and a hydrophilic polyurethane polymer as a carrier vehicle therefor, said hydrophilic polyurethane polymer being the reaction product of:
A solution effective in the repair of skin abrasions comprising a hydrophilic polyurethane polymer dissolved in a volatile non-toxic organic solvent, said polyurethane polymer being the reaction product of:
A cosmetic adapted for topical application comprising a solution of a non-toxic dye and a hydrophilic polyurethane polymer in a volatile non-toxic organic solvent, said polyurethane polymer being the reaction product of:
A surgical suture coated with a hydrophilic polyurethane polymer comprising the reaction product of:
An eye bandage comprising a hydrophilic polyurethane polymer film obtained by reacting:
A battery separator plate formed of a hydrophilic polyurethane polymer comprising the reaction product of:
A hair spray composition comprising a solution in a volatile non-toxic solvent of a hydrophilic polyurethane polymer obtained by reacting:
A gas permeable membrane formed of a hydrophilic polyurethane polymer comprising the reaction product of:
A depilatory liquid comprising a solution in a non-toxic solvent of a depilatory agent and a hydrophilic polyurethane polymer obtained by reacting:
A solution of perfume and a hydrophilic polyurethane polymer in a non-toxic solvent said polyurethane polymer comprising the reaction product of:
A corneal prosthesis comprising a solid transparent hydrophilic polyurethane polymer obtained by the reaction of:
A deodorant composition comprising a solution of a disinfectant, a perfume and a hydrophilic polyurethane polymer obtained by reacting:
A method of imparting moisture to a dry gas which comprises passing the gas through a tube formed of a hydrophilic polyurethane polymer obtained by reacting:
An antifogging liquid containing in solution a hydrophilic polyurethane polymer comprising the reaction product of:
A surgical drape comprising a fabric coated on at least one side with a hydrophilic polyurethane polymer obtained by reacting:
A dialysis membrane formed of a hydrophilic polyurethane polymer comprising the reaction product of:
In a blood oxygenator the improvement which comprises a carbon dioxide - oxygen exchange membrane formed of a hydrophilic polyurethane polymer comprising the reaction product of:
An amphoteric hydrophilic polyurethane polymer comprising the reaction product of:
An esophageal prosthesis constructed of a fabric tube reinforced with a spirally wound polypropylene monofilament and coated on at least one side with a hydrophilic polyurethane polymer obtained by reacting:
A contact lens comprising a molded hydrophilic polyurethane polymer obtained by reacting:
A coated device consisting of a substrate coated with a hydrophilic polyurethane polymer comprising the reaction product of:
Dependencies are inferred from the claim text.