[특허]Production of polyurethane foams for wound management

Production of polyurethane foams for wound management 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61L-015/42 C08G-018/48 C08G-018/71 C08G-101/00
출원번호	US-0169842 (2008-07-09)
등록번호	US-9168324 (2015-10-27)
우선권정보	EP-07013425 (2007-07-10)
발명자 / 주소	Mager, Michael Ludewig, Michael Matner, Mathias Dietze, Melita Fugmann, Burkhard
출원인 / 주소	Bayer MaterialScience AG
대리인 / 주소	Drinker Biddle & Reath LLP
인용정보	피인용 횟수 : 0 인용 특허 : 22

초록

The present invention provides novel polyurethane-based wound dressing foams, obtained by foaming and curing silane-terminated polyurethanes.

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1. A process for producing a wound dressing foam, comprising providing a composition comprising: (a) silane-terminated polyurethane prepolymers (I) obtained by reacting: (i) polyurethane prepolymers (A) having free isocyanate groups to an average NCO functionality of at least 1.5 with;(ii) di- and/or trialkoxysilanes (B) having amino, hydroxyl and/or thiol groups bonded to the silicon atom via an alkylene radical; or(iii) polyhydroxy compounds (C) having an average OH functionality of at least 1.5 with;(iv) di- and/or trialkoxysilanes (D) having isocyanate and/or isothiocyanate groups bonded to the silicon atom via an alkylene radical comprising more than one alkoxysilane group;(b) (foam) additives (II);(c) optionally catalysts (III);(d) optionally blowing agents (IV), and also(e) optionally further, auxiliary and adjunct materials (V);wherein the composition is foamed, applied to skin before, during or after foaming, and cured in the presence of water, andwherein said wound dressing foam has a density of less than 0.4 g/cm3 andwherein water is added for curing, in an amount such that the molar ratio of alkoxysilane groups in the silane-terminated prepolymer to added water is less than or equal to 1. 2. A wound dressing foam on an animal or human skin obtained by the process as claimed in claim 1 and comprising a silane-terminated polyurethane prepolymer, wherein said wound dressing foam has a density of less than 0.4 g/cm3, and wherein said wound dressing foam is present on the animal or human skin. 3. The process according to claim 1, wherein the silane-terminated prepolymers (I) are based on polyisocyanates or polyisocyanate mixtures having exclusively aliphatically and/or cycloaliphatically bound isocyanate groups and an average NCO functionality of 2 to 4. 4. The process according to claim 1, wherein the additives (II) comprise nonionic surfactants based on polyether siloxanes. 5. The process according to claim 1, wherein the compositions to be foamed comprise, based on dry substance, 85 to 99.9 parts by weight of silane-terminated polyurethane prepolymer (I) and 0.1 to 15 parts by weight of the (foam) additive (II) and also 0 to 50 parts by weight of auxiliary and adjunct materials (V). 6. A wound dressing foam obtained by the process of claim 1. 7. A wound dressing foam obtained by the process of claim 1 and comprising a silane-terminated polyurethane prepolymer, wherein said wound dressing foam is adhered to or laminated with or coated with a permeable or semi-permeable film. 8. A wound dressing foam obtained by the process of claim 1 and comprising a silane-terminated polyurethane prepolymer, wherein said wound dressing foam comprises an antimicrobially or biologically active component. 9. The wound dressing foam of claim 2, wherein said wound dressing foam has a density of less than 0.35 g/cm3. 10. The wound dressing foam of claim 2, wherein said wound dressing foam has a density in the range of from 0.01 to 0.2 g/cm3. 11. The process of claim 1, wherein said wound dressing foam has a density of less than 0.35 g/cm3. 12. The process of claim 1, wherein said wound dressing foam has a density in the range of from 0.01 to 0.2 g/cm3. 13. The process according to claim 4, wherein the compositions to be foamed comprise, based on dry substance, 85 to 99.9 parts by weight of silane-terminated polyurethane prepolymer (I) and 0.1 to 15 parts by weight of the (foam) additive (II) and also 0 to 50 parts by weight of auxiliary and adjunct materials (V). 14. The process according to claim 13, wherein the silane-terminated prepolymers (I) are based on polyisocyanates or polyisocyanate mixtures having exclusively aliphatically and/or cycloaliphatically bound isocyanate groups and an average NCO functionality of 2 to 2.4. 15. The process according to claim 1, wherein component C includes the addition of styrene oxide, ethylene oxide, propylene oxide, butylene oxide or epichlorohydrin or a mixture thereof. 16. The process according to claim 1, wherein component C includes the addition of ethylene oxide and propylene oxide in an amount from 10 to 65% by weight. 17. The process according to claim 1, wherein component C includes the addition of ethylene oxide and propylene oxide in an amount from 10 to 30% by weight. 18. The process according to claim 14, wherein component C includes the addition of ethylene oxide and propylene oxide in an amount from 10 to 30% by weight. 19. The process according to claim 1, wherein the molar ratio of alkoxysilane groups in the silane-terminated prepolymer to added water is less than 1. 20. The process according to claim 18, wherein the molar ratio of alkoxysilane groups in the silane-terminated prepolymer to added water is less than 1.

이 특허에 인용된 특허 (22)

Rawlings David A. (Elmdom GBX) Blott Patrick L. (Bishops Stortford GBX), Adhesive polymeric foam dressings.
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Callinan Andrew ; Scholz Matthew T., Alkoxysilane terminated resin and methods of making and using same.
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Alvarez Jose A. ; Morris Roy A., Casting tape article and method for molding casts.
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Barber, Jr., Loren L., Curable compositions and abrasive articles therefrom.
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Scholz Matthew T. (Woodbury MN) Bartizal Dennis C. (Woodbury MN) Reed Katherine E. (Stillwater MN) Larson Wayne E. (Maplewood MN) Ersfeld Dean A. (Maplewood MN) Sandvig Timothy C. (Woodville WI) Buck, Curable resin coated sheet having reduced tack.
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Scholz Matthew T. (Woodbury MN) Bartizal Dennis C. (Woodbury MN) Reed Katherine E. (Stillwater MN) Larson Wayne K. (Maplewood MN) Ersfeld Dean A. (Maplewood MN) Sandvig Timothy C. (Woodville WI) Buck, Curable resin coated sheet having reduced tack.
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Doubleday Walter D. ; Morris Roy A. ; Perez Marshall L. ; DeLuca Joseph R. ; Mahaffey J. Scott, Method for controlled lubricant delivery when molding tacky materials.
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Kiso,Hiroyuki; Tokumoto,Katsumi; Tamano,Yutaka, Method for producing a rigid polyurethane foam.
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Scholz Matthew T. (Woodbury MN) Berman Mark A. (St. Paul MN) Bartizal Dennis C. (Lakeland MN) Delmore Michael D. (Mounds View MN), Method of using water soluble films in curable casting tapes.
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Callinan Andrew (Callinan MN) Scholz Matthew T. (Woodbury MN), Orthopedic cast composed of an alkoxysilane terminated resin.
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Callinan Andrew (Robbinsdale MN) Scholz Matthew T. (Woodbury MN), Orthopedic cast composed of an alkoxysilane terminated resin.
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Leonid Rappoport ; Alex Vainer ; Aleksandr Yam, Polyfunctional urethane- or urea-containing oligomers and polymers prepared therefrom.
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Ludewig, Michael; Matner, Mathias; Groth, Stefan; Ruttmann, Gerhard, Polyurethane prepolymers with reduced functionality having terminal alkoxysilane and OH groups, a method of preparing them and their use.
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Purvis, Michael B.; Khudyakov, Igor V.; Overton, Bob; Gantt, Todd W., Radiation-curable coating composition including oligomeric photoinitiator and/or oligomeric adhesion promoter.
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Routledge James H. (2904 SW. BlueGrass Way West Linn OR 97068), Retractable wheel suspension apparatus.
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Shah Ketan N. ; Campbell Stephen M., Silane modified elastomeric compositions and articles made therefrom.
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Lock Peter Maurice (Gillingham EN), Surgical dressings.
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Lock Peter Maurice (Gillingham EN), Surgical dressings.
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Bryant Earle Ruskin (Adrian MI) Weis Joseph August (Toledo OH), Vulcanizable silicon terminated polyurethane polymer composition having improved cure speed.
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Bryant Earle R. (Adrian MI) Knittel Gerald H. (Waterville OH) Dircks Lon E. (Swanton OH), Vulcanizable silicon terminated polyurethane polymer compositions having improved cure speed.
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Sholz Matthew T. ; Berman Mark A. ; Bartizal Dennis C. ; Delmore Michael D., Water soluble films used in synthetic casting tapes.
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Garwood Donald C. (Costa Mesa CA) Kathiriya Shiraz A. (Costa Mesa CA), Water-activated casting material.
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