公开(公告)号：US3654210A

公开(公告)日：1972-04-04

申请号：US3654210D

申请日：1969-07-28

Applicant: HOECHST AG

Inventor： KUHLS JURGEN ,  HAHN HELMUT ,  STEININGER ALFRED

IPC: C08F2/22 ,  C08F259/08 ,  C08F45/24

CPC classification number: C08F259/08 ,  Y10T428/2982 ,  C08F214/26

Abstract: THE PRESENT INVENTION RELATES TO AQUEOUS DISPERSIONS OF POLYMERS ON THE BASIS OF POLYTETRAFLUOROETHYLENE. THE POLYMERIC PARTICLES HAVE AN AVERAGE DIAMETER OF 0.2 TO 0.5U AND CONSIST OF A CORE MADE FROM 90-99% BY WEIGHT OF TETRAFLUROETHYLENE AND 1-10% BY WEIGHT OF CERTAIN HALOGEN CONTAINING COMONOMERS AND A SHELL OF TETRAFLUOROETHYLENE HOMOPOLYMER. THIS POLYMERIC MATERIAL HAS IMPROVED PROPERTIES FOR PASTE EXTRUSION PROCESSES.