公开(公告)号：US3705118A

公开(公告)日：1972-12-05

申请号：US3705118D

申请日：1971-01-11

Applicant: IBM

Inventor： ABOLAFIA OSCAR R ,  BUTORA JOHN A ,  ORINIK MICHAEL T

IPC: C08J9/10 ,  C08J1/20

CPC classification number: C08J9/10 ,  C08J2379/00 ,  Y10S264/05 ,  Y10T428/249978 ,  Y10T428/24999

Abstract: A PROCESS FOR THE PREPARATION OF A MICROPOROUS CELLULAR POLYIMIDE ARTICLE COMPRISING PREPARING A MIXTURE IN AN INERT SOLVENT OF POLYAMIC ACID AND P,P''-OXYBIS(BENZENE SULFONYL HYDRAZIDE) AS A BLOWING AGENT, FORMING THE MIXTURE INTO A SHAPED ARTICLE, ALLOWING THE ARTICLE TO DRY WHEREIN THE BLOWING AGENT SIMULTANEOUSLY DECOMPOSES TO FORM A FOAMED ARTICLE AND HEATING THE FOAMED ARTICLE TO CYCLIZE THE POLYAMIC ACID IS DISCLOSED. THE FOAMED ARTICLE

CONTAINS MICROPORES OF ABOUT 1 MICRON IN DIAMETER WHICH IMPROVES ADHESION AT POLYMER-POLYMER AND POLYMERMETAL INTERFACES.