公开(公告)号：US3651008A

公开(公告)日：1972-03-21

申请号：US3651008D

申请日：1967-12-22

Applicant: CALIFORNIA INST OF TECHN

Inventor： MOSER BILLY G ,  LANDEL ROBERT F

IPC: B29B7/00 ,  C08J3/21 ,  C08G51/04 ,  C06B1/04 ,  C08H17/02

CPC classification number: B29B7/002 ,  C08J3/212

Abstract: FILLED POLYMER COMPOSITIONS MADE BY DISSOLVING THE POLYMER BINDER IN A SUITABLE SUBLIMABLE SOLVENT, MIXING THE FILLER MATERIAL WITH THE POLYMER AND ITS SOLVENT, FREEZING THE RESULTING MIXTURE, AND SUBLIMING THE FROZEN SOLVENT FROM THE MIXTURE, REMOVING IT THEREFROM. THE REMAINING COMPOSITION IS THEN SUITABLE FOR CONVENTIONAL PROCESSING, SUCH AS COMPRESSION MOLDING OR EXTRUDING. A PARTICULAR FEATURE OF THE METHOD OF MANUFACTURE IS POURING THE MIXED SOLUTION SLOWLY IN A CONTINUOUS STREAM INTO A CRYOGENIC BATH WHEREIN FROZEN PARTICLES OF THE MIXTURE RESULT. THE FROZEN INDIVIDUAL PARTICLES ARE THEN SUBJECTED TO THE SUBLIMATION.