公开(公告)号：DE3261076D1

公开(公告)日：1984-11-29

申请号：DE3261076

申请日：1982-11-19

Applicant: BASF AG

Inventor： VYVIAL RUDOLF ,  TAUBITZ CHRISTOF DR ,  SCHLEMMER LOTHAR ,  BLECKMANN GERHARD ,  ZUERGER MANFRED ,  KRIEGER HEINRICH ,  THIELE HEINO DR

IPC: B29B7/00 ,  B29C47/00 ,  B29C48/76 ,  B29C48/92 ,  B29K29/00 ,  B29L7/00 ,  C08J5/18 ,  B29D7/02

Abstract: A sheet-like structure is produced from a vinyl alcohol polymer by a method wherein, in a self-cleaning multi-screw extruder, the polymer is mixed with a small amount of water, the mixture is melted, homogenized, devolatilized and finally extruded as a melt, and the extrudate is shaped in a conventional manner into the sheet-like structure.

公开(公告)号：DE3338489A1

公开(公告)日：1984-05-03

申请号：DE3338489

申请日：1983-10-22

Applicant: BASF AG

Inventor： BRONSTERT BERND DR ,  ZUERGER MANFRED ,  FLOHR JOACHIM ,  KRIEGER HEINRICH ,  ZETTLER HANS DIETER ,  BLECKMANN GERHARD ,  SCHLEMMER LOTHAR ,  TAUBITZ CHRISTOF DR ,  VYVIAL RUDOLF ,  WERTHER HEINZ-ULRICH DR

IPC: G03F7/037 ,  G03F7/16 ,  G03C1/68 ,  G03F7/10

Abstract: In a process for producing light-sensitive polyamide layers which are suitable for producing photopolymeric printing forms or relief forms, a polyamide soluble or dispersible in the solvent, a photopolymerisable, low-molecular, ethylenically unsaturated compound, a photopolymerisation initiator and, if appropriate, further conventional additives are homogeneously mixed with one another, and the homogeneous mixture is, if necessary, freed of interfering volatile constituents by degassing and then formed to give the light-sensitive layer. According to the invention, the photopolymerisable mixture is, before forming to give the light-sensitive layer, heated largely with exclusion of oxygen and with simultaneous movement or further mixing in the melt for a period of 5 seconds to about 10 minutes to a temperature which is 20 to 80 DEG C above the softening point of the mixture.