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公开(公告)号：EP2836543A1
公开(公告)日：2015-02-18
申请号：EP13720822.9
申请日：2013-04-12
申请人： BASF SE
发明人： RUDOLPH, Hans , KLOSTERMANN, Rainer , KAMINSKY, Torben , LOHAUS, Bernd , AHLERS, Jürgen , SCHMIED, Bernhard , GUTMANN, Peter , HAHN, Klaus , PRISSOK, Frank , MARTEN, Elke , DÄSCHLEIN, Christian
摘要： The invention relates to a method for producing expanded granules from a propellant-containing polymer melt, comprising the steps: a) pressing the propellant-containing polymer melt through a perforated plate controlled to a temperature between 150°C and 280°C into a granulation chamber; b) comminuting the polymer melt pressed through the temperature-controlled perforated plate into individual expanding granules with a cutting device; c) discharging the granules from the granulation chamber with a fluid stream, wherein the propellant contains CO
2 or N2 or a combination of CO2 and N2, and a fluid controlled to a temperature between 10°C and 60°C and having a pressure between 0.7 bar and 20 bar above the ambient pressure is caused to flow through the granulation chamber, and wherein the pressure and temperature of the fluid in the granulation chamber as well as the temperature of the perforated plate are selected such that the granules in the fluid under pressure are expanded by the propellant they contain in such a manner that expanded granules with a closed skin are created.-
公开(公告)号：EP2836543B1
公开(公告)日：2020-03-04
申请号：EP13720822.9
申请日：2013-04-12
申请人： BASF SE
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