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US 9,808,554 B2Granted
Super soft foams
AssigneeCovidien LP
InventorHansen P. Swaniker
Life of this patent
Estimating the term…
Abstract
Super-soft foam materials, optionally for use as medical dressings, are provided. The pads are made of a foam prepared from NCO-terminated prepolymers in combination with an aqueous phase including fatty alcohols and alkyl polysaccharides. The foam may optionally contain at least one medicinal agent.
Claims19
A medical product comprising:
- a dried, porous foam produced from a composition for a foam comprising:
- at least one NCO-terminated hydrophilic urethane prepolymer comprising a reaction product of at least one isocyanate selected from the group consisting of aromatic isocyanates, aliphatic isocyanates, and combinations thereof, in combination with a polyether polyol comprising a reaction product of an ethylene oxide and a compound containing at least two active hydrogen atoms selected from the group consisting of polyhydric alcohols, polyhydric phenols, amines, polycarboxylic acids, and phosphorous acids;
- an aqueous phase comprising deionized water, at least one fatty alcohol, and at least one alkyl polysaccharide;
- and
- an antimicrobial agent selected from the group consisting of polyhexamethylene biguanide (PHMB), polyethylene hexamethylene biguanide, and combinations thereof, wherein the antimicrobial agent is present in the composition in an amount up to about 20,000 ppm.
2 more elements
A wound dressing comprising:
- a dried, porous foam formed by a composition comprising:
- at least one NCO-terminated hydrophilic urethane prepolymer comprising a reaction product of at least one isocyanate selected from the group consisting of aromatic isocyanates, aliphatic isocyanates, and combinations thereof, in combination with a polyether polyol comprising a reaction product of an ethylene oxide and a compound containing at least two active hydrogen atoms selected from the group consisting of polyhydric alcohols, polyhydric phenols, amines, polycarboxylic acids, and phosphorous acids;
- an aqueous phase comprising deionized water, cetearyl alcohol, polyoxyethylene ether derived from cetyl alcohol and stearyl alcohol, and an alkyl polyglucoside of the formula:
- RO(CnH2nO)r(Z)x;
- wherein Z is derived from glucose, R is a hydrophobic group selected from the group consisting of alkyl, alkylphenyl, hydroxyalkylphenyl, and mixtures thereof having from about 10 to about 18 carbon atoms, n is from about 2 to about 3, r is from about 0 to about 10, and x is from about 1.5 to about 8;
- and
- from about 5,000 ppm to about 20,000 ppm of an antimicrobial agent comprising polyhexamethylene biguanide.
4 more elements
Dependencies are inferred from the claim text.