Hydrophilic foam compositions
First Claim
Patent Images
1. A hydrophilic foam composition comprising the in situ reaction product of:
- a) an isocyanate-capped polyether prepolymer, b) a polymeric hydrophilic agent capable of absorbing water, c) an adjuvant comprising an alcohol selected from the group consisting of water soluble monols, diols and polyhydric alcohols, d) a wetting agent, and e) water, said hydrophilic foam composition releasably carrying said adjuvant so that said foam composition is capable of absorbing an external liquid and tightly carrying said liquid in preference to at least a portion of said adjuvant so that said adjuvant is released in the presence of the external liquid.
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Abstract
A hydrophilic foam composition comprising the in situ reaction product of an isocyanate-capped polyether prepolymer, a hydrophilic agent capable of absorbing water, an adjuvant comprising an alcohol, a wetting agent, and water.
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Citations
40 Claims
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1. A hydrophilic foam composition comprising the in situ reaction product of:
- a) an isocyanate-capped polyether prepolymer, b) a polymeric hydrophilic agent capable of absorbing water, c) an adjuvant comprising an alcohol selected from the group consisting of water soluble monols, diols and polyhydric alcohols, d) a wetting agent, and e) water, said hydrophilic foam composition releasably carrying said adjuvant so that said foam composition is capable of absorbing an external liquid and tightly carrying said liquid in preference to at least a portion of said adjuvant so that said adjuvant is released in the presence of the external liquid.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A hydrophilic foam composition comprising the in situ reaction product of :
- a) an isocyanate-capped polyether prepolymer, wherein said prepolymer is a member selected from the group consisting of isocyanate-capped polyether polyols having an isocyanate equivalent weight of from about 0.5 meq/g to about 3.0 meq/g, b) a hydrophilic agent capable of absorbing water, said hydrophilic agent being a member selected from the group consisting of starch grafted copolymers of acrylate salts, starch grafted copolymers of acrylamide salts, polyacrylate salts and mixtures thereof;
c) an adjuvant comprising an alcohol, said adjuvant being a member selected from the group consisting of ethanol, isopropyl alcohol, propylene glycol, polyethylene glycol, polypropylene glycol, glycerine, 1,2,4- butanetriol, trimethylolpropane, sorbitol, pentaerythritol, and mixtures thereof;
said reactant composition (d) including a wetting agent selected from the group consisting of block copolymers of ethylene oxide and propylene oxide, ethoxylated sorbitan fatty acid esters, glycerol esters, polyglycerol esters, silicone fluids and mixtures thereof, and e) water, said water being a member selected from the group consisting of deionized water, distilled water and normal saline. - View Dependent Claims (24, 40)
- a) an isocyanate-capped polyether prepolymer, wherein said prepolymer is a member selected from the group consisting of isocyanate-capped polyether polyols having an isocyanate equivalent weight of from about 0.5 meq/g to about 3.0 meq/g, b) a hydrophilic agent capable of absorbing water, said hydrophilic agent being a member selected from the group consisting of starch grafted copolymers of acrylate salts, starch grafted copolymers of acrylamide salts, polyacrylate salts and mixtures thereof;
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25. A wound dressing comprising the in situ reaction product of:
- a) an isocyanate-capped polyether prepolymer, b) a polymeric hydrophilic agent capable of absorbing water, c) an adjuvant comprising an alcohol selected from the group consisting of water soluble monols, diols and polyhydric alcohols, d) a wetting agent, and e) water, said hydrophilic foam composition releasably carrying said adjuvant so that said foam composition is capable of absorbing an external liquid and tightly carrying said liquid in preference to at least a portion of said adjuvant so that said adjuvant is released in the presence of the external liquid.
- View Dependent Claims (29, 30, 31, 32, 33, 34, 37)
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26. A wound dressing composition comprising the in situ reaction product of:
- a) an isocyanate-capped polyether prepolymer selected from the group consisting of isocyanate-capped polyether polyols having an isocyanate equivalent weight of from about 0.5 meq/g to about 7.5 meq/g, b) a hydrophilic agent capable of absorbing water selected from the group consisting of starch grafted copolymers of acrylate salts, starch grafted copolymers of acrylamide salts, polyacrylate salts, and mixtures thereof, c) an adjuvant comprising an alcohol selected from the group consisting of ethanol, isopropyl alcohol, propylene glycol, polyethylene glycol, polypropylene glycol, glycerine, 1,2,4-butanetriol, trimethylolpropane, sorbitol, pentaerythritol, and mixtures thereof, d) a wetting agent selected from the group consisting of block copolymers of ethylene oxide and propyleneoxide, ethoxylated sorbitan fatty acid esters, glycerol esters, polyglycerol esters, silicone fluids, and mixtures thereof, and e) water selected from the group consisting of deionized water, distilled water, and normal saline, said hydrophilic foam composition releasably carrying said adjuvant so that said foam composition is capable of absorbing an external liquid and tightly carrying said liquid in preference to at least a portion of said adjuvant so that said adjuvant is released in the presence of the external liquid.
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27. A wound dressing comprising a hydrophilic foam composition comprising the in situ reaction product of
(a) an isocyanate-capped polyether prepolymer having an isocyanate equivalent weight of from about 0.5 meq/g to about 3 meq/g; -
(b) a hydrophilic agent capable of absorbing water and having a fluid uptake of at least about 50 ml of water per gram of said agent, and wherein said hydrophilic agent comprises a hydrophilic material which is a member selected from the group consisting of starch grafted copolymers of acrylate salts, starch grafted copolymers of acrylamide salts, polyacrylate salts and mixtures thereof; (c) an adjuvant comprising an alcohol selected from the group consisting of ethanol, isopropyl alcohol, propylene glycol, polyethylene glycol, polypropylene glycol, glycerine, 1,2,4-butanetriol, trimethylolpropane, pentaerythritol sorbitol, and mixtures thereof; (d) a wetting agent comprising a non-ionic surfactant selected from the group consisting of block copolymers of ethylene oxide and propylene oxide, ethoxylated sorbitan fatty acid esters, glycerol esters, polyglycerol esters, silicone fluids and mixtures thereof; and (e) water, said hydrophilic foam composition releasably carrying said adjuvant so that said foam composition is capable of absorbing an external liquid and tightly carrying said liquid in preference to at least a portion of said adjuvant so that said adjuvant is released from said foam composition in the presence of the external liquid. - View Dependent Claims (28, 35, 36, 38, 39)
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Specification