摘要:
A polyurethane dispersion and a method of making are provided. The polyurethane dispersion is stable in a mixture of alcohol and water. The dispersion comprises the reaction product of (a) an isocyanate terminated polyurethane prepolymer comprising the reaction product of (i) at least one oligomeric polyactive hydrogen compound insoluble in said alcohol, wherein said polyactive hydrogen compound is an alkyl, aryl, or aralkyl structure optionally substituted by N, O, and S; (ii) at least one polyisocyanate, and (iii) at least one polyactive hydrogen compound soluble in said mixture of alcohol and water; (b) a polyfunctional chain extender; and (c) a monofunctional chain terminator; wherein the equivalent ratio of difunctional chain extender to prepolymer isocyanate is 0.60 to 1.20.
摘要:
A polyurethane dispersion and method of making are provided. The dispersion is stable in an alcohol-water mixture. The dispersion is a reaction product of: (i) at least one oligomeric polyactive hydrogen compound, wherein said compound is an alkyl, aryl, or aralkyl structure optionally substituted in and/or on the chain by N, O, S and combinations thereof, and wherein the compound is insoluble in 50:50 weight percent of said alcohol-water mixture; (ii) at least one polyisocyanate, and (iii) at least one polyactive hydrogen compound soluble in the alcohol-water mixture selected from the group consisting of a compound containing an ionic group, a compound containing a moiety capable of forming an ionic group, a compound containing a polyester, polyether, or polycarbonate group having a ratio of 5 or less carbon atoms for each oxygen atom, and mixtures thereof; and (b) at least one polyfunctional chain extender.
摘要:
Dimensionally stable nonwoven fibrous webs include a plurality of fibers formed from one or more thermoplastic polyesters and an antishrink additive, preferably in an amount greater than 0% and no more than 10% by weight of the web. The webs have at least one dimension which decreases by no greater than 12% in the plane of the web when heated to a temperature above a glass transition temperature of the fibers. The webs may be used as wipes.
摘要:
Medical dressings and medical dressing kits that can be used to provide negative pressure wound therapy. The medical dressings include one or more normally-closed valves, and may include stand-off elements, barrier elements, closure elements, and septum elements. The medical dressing kits may further include pumps, fluid traps, and/or fittings.
摘要:
Medical dressings and medical dressing kits that can be used to proved positive pressure wound therapy. The medical dressings include one or more normally-closed valves. The medical dressing kits may further include fittings.
摘要:
Antimicrobial compositions comprising aliphatic polyester, and an antimicrobial component effective for antimicrobial activity, and, in some embodiments, an enhancer. Example: blend of poly(lactic acid) polymer (55g) with propyleneglycol monolaurate antimicrobial component (9g), and benzoic acid enhancer (1g). Inventive resin compositions are effective against gram negative and gram positive bacteria, mold and mildew. Preferred compositions comprise materials that are GRAS (Generally Regarded As Safe).
摘要:
A skin antisepsis composition comprising a comprising a (C1-4)alcohol and water in a ratio of at least 60:40, a hydroxycarboxylic acid, a cationic film-forming polymer, and at least one antimicrobial agent; and methods of using the composition are provided.
摘要:
Disclosed are surfaces for resisting and reducing biofilm formation, particularly on medical articles (100). The surfaces include a plurality of microstructures (120) including a plurality of nanofeatures (140) arranged according to at least one unit cell. Also disclosed are methods for creating anti-adherent surfaces.
摘要:
Patient support systems and methods for transferring patients and controlling patient temperature. The system can include a non-inflatable and self-supporting platform that can include a first surface and a second surface separated by a distance, a plurality of supporting structures that extends at least partially across the distance between the first surface and the second surface, a plenum, and a plurality of apertures formed through at least one of the first surface and the second surface and in fluid communication with the plenum. The system can further include a fluid source configured to move fluid into the plenum and out the plurality of apertures. A method of transferring a patient can include moving fluid into the plenum and out the plurality of apertures to form a fluid pallet. A method of controlling patient temperature can include moving a temperature-controlled fluid into the plenum and out the plurality of apertures.
摘要:
A bioadhesive composition that adheres suitably to a mucosal surface and is capable of delivering drugs in sustained fashion, and a patch comprising the bioadhesive composition. Methods of using and processes for preparing the bioadhesive composition are also described.