Patent CA457348A successfully refreshed from Google Patents.
EP0707935A2
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EP
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Method of making micro cellular foams
Assignee: BASF SE
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Filing: 1995-10-17
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Granted: —
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Expires: 2015-10-17
Abstract
Abstract The prodn. micro-cellular thermoplastic foam sheet comprises: (a) impregnating a plastic melt (I) with a volatile blowing agent (II) in the supercritical state in a first extrusion zone A at a temp. above the T, of (I); (b) cooling the melt by at least 40 degrees C in a second extrusion zone B, to a temp. at least 30 degrees C above the Tg of blowing agent-free (I), and (c) expanding to normal pressure and cooling to room temp. to give expanded solid foam.
Inventors
- 👤 Horst Dr. Baumgartl
- 👤 Franz-Josef Dr. Dietzen
- 👤 Johann Dr. Swoboda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:29
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/122; B; B29; B29C; B29C44/00; B29C44/34; B29C44/3469; B29C44/348; B29C44/36; B29C44/46; B29C44/50; B29C44/505; C08J2201/00; C08J2201/02; C08J2201/03; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06
Claims Analysis
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References Cited (Backward Citations)
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