Invention Grant
- Patent Title: Process for the production of microporous sheet-form products permeable to water vapour
- Patent Title (中): 生产可渗透水蒸气的微晶薄膜产品的工艺
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Application No.: US3553008DApplication Date: 1969-02-28
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Publication No.: US3553008APublication Date: 1971-01-05
- Inventor: REISCHL ARTUR , TRAUBEL HARRO , ZORN BRUNO
- Applicant: BAYER AG
- Assignee: Bayer Ag
- Current Assignee: Bayer Ag
- Priority: DEF0048079 1966-01-03
- Main IPC: C08G18/10
- IPC: C08G18/10 ; C08G18/65 ; C08G18/84 ; C08G18/86 ; C08J9/28 ; D06N3/14 ; B44D1/44
Abstract:
A PROCESS FOR PRODUCING A VAPOR PERMEABLE, MICROPOROUS, LEATHERLIKE SHEET MATERIAL BY DISSOLVING A POLYURETHANE IN A FIRST LIQUID (SOLVENT) TO WHICH IS ADDED A SECOND LIQUID (NON-SOLVENT) IN WHICH THE POLYURETHANE IS INSOLUBLE BUT WHICH IS MISCIBLE WITH SOLVENT, SHAPING THE SOLUTION ON A SUITABLE SUBSTRATE AND REMOVING BOTH THE SOLVENT AND THE NON-SOLVENT.
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