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公开(公告)号：US3575892A
公开(公告)日：1971-04-20
申请号：US3575892D
申请日：1968-02-09
Applicant: DART IND INC
Inventor： ERCHAK MICHAEL JR , MERCIER PHILIP L , DOAK KENNETH W
CPC classification number: C08J9/18 , Y10S264/05
Abstract: THE PROCESS COMPRISES IMPREGNATING BEADS OF A POLYMER SUCH AS POLYSTYRENE IN A NON-AQUEOUS ENVIRONMENT WITH LIQUEFIED BUTANE AT CONDITIONS SUFFICIENT TO MAINTAIN THE BUTANE IN ITS LIQUEFIED STATE, REMOVING THE EXCESS BUTANE FROM THE IMPREGNATED BEADS AND RECOVERING THE FOAMABLE BEADS.
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