公开(公告)号：US3825506A

公开(公告)日：1974-07-23

申请号：US35096073

申请日：1973-04-13

Applicant: GLASROCK PRODUCTS

Inventor： CARTER E

IPC: C08G59/18 ,  C08J9/28 ,  C08J9/32 ,  C08G53/08

CPC classification number: C08J9/28 ,  C08G59/18 ,  C08J9/32 ,  C08J2201/054

Abstract: POROUS OPEN-CELL THERMOSETTING RESIN AND PROCESS FOR PREPARING SAME. THE PROCESS INVOLVES THE INITIAL FORMATION OF AN EMULSION HAVING A LIQUID RESIN BLEND AS THE CONTINUOUS PHASE AND A HARDENER SOLUTION OR DISPERSION AS THE DISCONTINUOUS PHASE. THE RESIN BLEND PHASE INITIALLY CONTAINS AN AMOUNT OF HARDENER LESS THAN THAT REQUIRED FOR A STOICHIOMETRIC CURE OF THE RESIN. THE HARDENER SOLUTION OR DISPERSION INITIALLY CONTAINS AN ADDITIONAL AMOUNT OF HARDENER TO SUPPLEMENT THE BLEND AND CURE THE RESIN. THE LIQUID OF THE NON-RESIN PHASE IS SELECTED TO BE SUBSTNTIALLY A NON-SOLVENT WITH RESPECT TO THE RESIN. AS THE POLYMERIZATION OF THE EMULSION PROCEEDS HARDENER IS LEACHED OUT OF THE SOLUTION PHASE WHICH IS THE DISCONTINUOUS PHASE,

RESULTING IN A PHASE INVERSION AFTER PARTIAL GELATION WITH THE NON-RESIN LIQUID SOLUTION PHASE BECOMING THE CONTINUOUS PHASE ND THE NON-GELLED RESIN BLEND BECOMING THE DISCONTINUOUS PHASE. AFTER POLYMERIZATION IS COMPLETED AND THE RESIN SOLIDIFIED, THE LIQUID OF THE NON-RESIN PHASE IS REMOVED BY EXTRACTION OR EVAPORATION. THE RESULT IS A RESIN HAVING A NETWORK OF INTERCONNECTED PORES. AN IMPORTANT ASPECT OF THE INVENTION IS THAT IT PERMITS CONTROL OF THE PORE SIZE OF THE PRODUCT.