Method of removing oil slicks from water surfaces
Abstract
Abstract WHEN A PIECE OF FULLY CURED UREA FORMALDEHYDE RESIN FOAM IS DIPPED INTO AN OIL SLICK FLOATING ON WATER, ONLY THE OIL SLICK IS ABSORBED INTO THE PIECE OF FOAM. ENTRY OF THE WATER IS BLOCKED BY THE NARROW CAPILLARIES IN THE CELL WALLS WHICH CONNECT MOST OF THE OTHERWISE SEALED AIR CELLS IN THE FOAM TO EACH OTHER AND TO THE ATMOSPHERE. THEY PERMIT ABSORPTION OF LIQUIDS OF OW SURFACE TENSION, BUT NOT OF LIQUIDS HAVING A SURFACE TENSION AS HIGH AS THAT OF ORDINARY WATER OR OF SEA WATE WHICH ESSENTIALLY CONSISTS OF WATER. UREA FORMALDEHYDE RESIN IS MUCH LESS COSTLY THAN THE CORRESPONDING RESINS PREPARED FROM MALAMINE AND PHENOL WHOSE FOAMS HAVE A SIMILAR STRUCTURE AND ARE SIMILARLY EFFECTIVE.
Inventors
- 👤 Heinz Baumann
Bibliographic Details
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