Urethane bioimplant membrane
First Claim
1. A method of implanting an unfoamed microporous hydrophilic bioimplant membrane within the living tissue in a mammal comprising the steps of producing a substantially unfoamed microporous hydrophilic bioimplant membrane by reacting a first component comprising isocyanate end-capped polyol chosen from the group consisting of polyetherol, polyesterol and mixtures thereof and having a reaction functionality of at least two with a second component comprising a C2 to C6 diol in an isocyanate monomer to diol molar ratio of 1 to 3.5 in a non-aqueous solvent reaction medium at a total solids concentration of less than 25%, volatilizing the solvent at a rate not causing the reaction product to foam whereby said unfoamed microporous hydrophilic bioimplant membrane is produced and placing the membrane so produced within the living tissue of a mammal.
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Accused Products
Abstract
Bioimplant three dimensional latice of hydrophilic polyurethane having a backbone of polyetherol or polyesterol, end-capped with aliphatic or aromatic diisocyanate, chain branched with polyol and bound into a latice by chain extension alkyl diols. The method of producing such a latice. An extension would be the use of the latice for other medical and veterinary purposes.
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Citations
32 Claims
- 1. A method of implanting an unfoamed microporous hydrophilic bioimplant membrane within the living tissue in a mammal comprising the steps of producing a substantially unfoamed microporous hydrophilic bioimplant membrane by reacting a first component comprising isocyanate end-capped polyol chosen from the group consisting of polyetherol, polyesterol and mixtures thereof and having a reaction functionality of at least two with a second component comprising a C2 to C6 diol in an isocyanate monomer to diol molar ratio of 1 to 3.5 in a non-aqueous solvent reaction medium at a total solids concentration of less than 25%, volatilizing the solvent at a rate not causing the reaction product to foam whereby said unfoamed microporous hydrophilic bioimplant membrane is produced and placing the membrane so produced within the living tissue of a mammal.
- 3. A method of placing a hydrophilic biononirritating material within the living tissue in a mammal comprising producing a hydrophilic biononirritating material by reacting a first component comprising isocyanate end-capped polyol chosen from the group consisting of polyetherol, polyesterol and mixtures thereof and having a reaction functionality of at least two with a second component comprising a C2 to C6 diol in an isocyanate monomer to diol molar ratio of 1 to 3.5 in a non-aqueous solvent reaction medium at a total solids concentration of less than 25%, volatilizing the solvent whereby said hydrophilic biononirritating material is produced and placing the material within the living tissue of a mammal.
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5. A method of producing a substantially unfoamed microporous hydrophilic bioimplant membrane comprising reacting a first component comprising isocyanate end-capped polyol chosen from the group consisting of polyetherol, polyesterol and mixtures thereof and having a reaction functionality of at least two with a second component comprising a C2 to C6 diol in an isocyanate monomer to diol molar ratio of 1 to 3.5 in a non-aqueous solvent reaction medium at a total solids concentration of less than 25% and volatilizing the solvent at a rate not causing the reaction product to foam and producing said unfoamed microporous hydrophilic bioimplant membrane.
- 13. A bioimplant member comprising a microporous molecular lattice of hydrophilic polyurethane, said polyurethane having a backbone chosen from the group consisting of polyetherols and polyesterols, or mixtures thereof, said backbone end-capped with isocyanate selected from the group consisting of aliphatic isocyanates and aromatic isocyanates, said urethane having chain branching centers of polyol, said branched urethane chains being bound by a C2 to C6 diol chain extension to form continuous three dimensional lattices and said urethane having a molar ratio of isocyanate to diol of from 1 to 3.5.
- 21. A method of producing a hydrophilic biononirritating material comprising reacting a first component comprising isocyanate end-capped polyol chosen from the group consisting of polyetherol, polyesterol and mixtures thereof and having a reaction functionality of at least two with a second component comprising a C2 to C6 diol in an isocyanate monomer to diol molar ratio of 1 to 3.5 in a non-aqueous solvent reaction medium at a total solids concentration of less than 25% and volatilizing the solvent and producing said hydrophilic biononirritating material.
- 28. A substantially biononirritating material comprising a hydrophilic polyurethane, said polyurethane having a backbone chosen from the group consisting of polyetherols and polyesterols, or mixtures thereof, said backbone end-capped with isocyanate chosen from the group consisting of aliphatic isocyanates and aromatic isocyanates, said urethane having chain branching centers of polyol, said branched urethane chains being bound by a C2 to C6 diol chain extension to form continuous three dimensional lattices and said urethane having a molar ratio of isocyanate to diol of from 1 to 3.5.
Specification