Spray-spun bandage composition

{
  "publication_number": "US3880158A",
  "country": "US",
  "kind": "A",
  "title": "Spray-spun bandage composition",
  "abstract": "A bandage composition especially suitable for application from aerosol containers onto wound surfaces. These compositions comprise Ax By Az block polymers wherein the Ax and Az blocks are a non-elastomeric polymers and the By block is an elastomeric polymer, together with solvents for the block polymers and propellants. The composition may also include local anesthetics and antibiotic or antiseptic agents. When applied to a wound surface, an opaque adherent flexible fibril mat, which is breathable to air, yet is largely occlusive to liquids is formed.",
  "claims": [
    "1. A BANDAGE COMPOSITION FOR DISPENSING A FIBROUS COVERING FOR A WOUDN FROM AEROSOL CONTAINERS COMPRISING: ABOUT 1.5 TO 10% BY WEIGHT OF THE BANDAGE COMPOSITION OF AN A-B-A BLOCK COPOLYMER WHEREIN (1) AND A BLOCK IS POLYSTYRENE HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 2,000 TO 100,000 AND A GLASS TRANSITION TEMPERATURE OF AT LEAST 33*C AND CONSTITUTING ABOUT 10-50% OF THE TOTAL COPOLYMER WEIGHT AND (2) SAID B BLOCK IS SELECTED FROM THE GROUP CONSISTING OF POLYISOPRENE AND POLYBUTADIENE, SAID B BLOCK HAVING A MOLECULAR WEIGHT OF FROM 25,000 TO 1,000,000 AND A GLASS TRANSITION TEMPERATURE OF LESS THAN 10*C; ABOUT 2-10% BY WEIGHT OF SAID BANDAGE COMPOSITION COMPRISING A MIXTURE OF ACETONE AND CYCLOHEXANE, SAID MIXTURE COMPRISING NO LESS THAN 30% BY WEIGHT OF SAID ACETONE; AND A PROPELLANT COMPRISING 75-95% BY WEIGHT OF THE BANDAGE COMPOSITION, A PORTION OF SAID PROPELLANT COMPRISING NO MORE THAN 10% BY WEIGHT OF SAID BANDAGE COMPOSITION BEING CAPABLE OF INDEPENDENTLY DEVELOPING A PRESSURE OF AT LEAST 70 POUNDS PER SQUARE INCH GUAGE AT 20*C, SAID PROPELLANT AND SAID ACETONE-CYCLOHEXANE MIXTURE HAVING TOGETHER A SOLUBILITY PARAMETER OF FROM ABOUT 7.3 TO ABOUT 10.",
    "2. The composition of claim 1 wherein said acetone in said mixture comprises 40 to 80% by weight."
  ],
  "cpc": [
    "A61L 26/0076",
    "A61F 13/01017",
    "A61F 13/8405",
    "A61F 2013/00157",
    "A61F 2013/00519",
    "A61F 2013/51042",
    "A61F 2013/51443",
    "A61F 2013/530131",
    "A61L 26/0014"
  ],
  "assignees": [
    "JOHNSON & JOHNSON"
  ],
  "filing_date": "1974-04-04",
  "publication_date": "1975-04-29",
  "grant_date": "1975-04-29",
  "priority_date": "1974-04-04",
  "application_number": "US-45787574-A",
  "family_id": "23818417",
  "citations": [
    "US3419506A",
    "US3577516A",
    "US3608070A",
    "US3705669A"
  ]
}