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PROCESS OF PRODUCING A PERMEABLE SYNTHETIC FILM
   
Document Number
US Patent 3765925
Issued Date
October 16, 1973
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Inventors
Murphy; Walter T. (Cuyahoga Falls, OH)
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Abstract
A poromeric film is provided which is based on a polymer cement of polyurethane, polyvinyl chloride, and plasticizer. No internal non-solvent is used. The cement is applied to a water permeable substrate and coagulated in a water bath.
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Number of Claims:
2
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Published
October 16, 1973
Application Number
05/194,526
Filed
November 1, 1971
US Classification
427/341   427/353 427/354
Int'l Classification
C08J   9/00   (20060101)   C08J   9/28   (20060101)  
Assistant Examiner
USPTO Field of Search
117/161KP   117/63   117/135.5   260/859   260/32.6N   260/3.4N  
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