公开(公告)号：US3558344A

公开(公告)日：1971-01-26

申请号：US3558344D

申请日：1968-04-19

Applicant: ATOMIC ENERGY COMMISSION

Inventor： PETERSON GEORGE R ,  STOOKSBURY CLIFTON E

IPC: C04B41/50 ,  C04B41/65 ,  C04B41/85 ,  B44D1/09

CPC classification number: C04B41/009 ,  C04B41/5001 ,  C04B41/65 ,  C04B41/85 ,  Y10T428/249967 ,  Y10T428/249988 ,  Y10T428/30 ,  C04B35/522 ,  C04B28/00

Abstract: THE STRUCTURAL INTEGRITY OF HIGH- OR LOW-DENSITY CARBON FOAM IS IMPROVED BY PROVIDING THE LATTER WITH A PROTECTIVE CARBONACEOUS COATING. THE PROTECTIVE COATING IS PROVIDED BY APPLYING TO EXPOSED SURFACES OF A CARBON FOAM STRUCTURE A MIXTURE OF GRAPHITE FLOUR AND A THERMOPLASTIC RESIN DISSOLVED IN A SUITABLE SOLVENT. THE COATING MIXTURE IS DRIED AT A RELATIVELY LOW TEMPERATURE TO REMOVE EXCESS SOLVENT AND THEN HEATED TO A TEMPERATURE SUFFICIENT TO CARBONIZE THE RESIN AND FORM THE COATING.