公开(公告)号：AU5252493A

公开(公告)日：1994-06-30

申请号：AU5252493

申请日：1993-12-20

Applicant: 3D SYSTEMS INC

Inventor： STEINMANN BETTINA ,  WOLF JEAN-PIERRE ,  SCHULTHESS ADRIAN ,  HUNZIKER MAX

IPC: C08G59/18 ,  C08F283/00 ,  C08F283/10 ,  C08G59/00 ,  C08G59/14 ,  C08G59/40 ,  C08G59/62 ,  C08G59/68 ,  C08L63/00 ,  G03F7/00 ,  G03F7/027 ,  G03F7/029 ,  G03F7/038 ,  C08L63/10 ,  C08L67/00 ,  C08L67/04 ,  C08L71/00 ,  C08L75/04

Abstract: The invention relates to photosensitive compositions containing A) 40-80% by weight of at least one liquid epoxy resin having an epoxide functionality equal to or greater than 2, B) 0.1-10% by weight of at least one cationic photoinitiator for component A), C) 5-40% by weight of at least one liquid cycloaliphatic or aromatic diacrylate, D) 0-15% by weight of at least one liquid poly(meth)acrylate having a (meth)acrylate functionality greater than 2, the content of component D) in the total (meth)acrylate content being at most 50% by weight, E) 0.1-10% by weight of at least one free-radical photoinitiator for the components C) and, if present, D) and F) 5-40% by weight of at least one OH-terminated polyether, polyester or polyurethane, which compositions are particularly suitable, for example, for producing photopolymerised layers, especially of three-dimensional objects.

公开(公告)号：AU1192497A

公开(公告)日：1997-07-17

申请号：AU1192497

申请日：1996-12-10

Applicant: 3D SYSTEMS INC

Inventor： SCHULTHESS ADRIAN ,  STEINMANN BETTINA ,  HOFMANN MANFRED

IPC: B29C67/00 ,  G03F7/00

Abstract: PCT No. PCT/EP96/05508 Sec. 371 Date Jun. 18, 1998 Sec. 102(e) Date Jun. 18, 1998 PCT Filed Dec. 10, 1996 PCT Pub. No. WO97/23342 PCT Pub. Date Jul. 3, 1997The present invention relates to a process for the stereolithographic preparation of a three-dimensional object, wherein the object is built in a container which contains a radiation-curable liquid formulation with fillers by a repeated alternating succession of process steps (a) and (b). In step (a), a layer of the radiation-curable liquid formulation, one limitation of which is the surface of the formulation, is cured using suitable radiation within an surface area which corresponds to the desired cross-section of the three-dimensional object to be formed at the level of this layer. In step (b), said cured layer is coated with a new layer of the radiation-curable liquid formulation. The process comprises homogenizing the radiation-curable liquid formulation continuously or discontinuously to such an extent that there is no noticeable change in the filler content of the radiation-curable liquid formulation in the area of that layer with which the cured layer is coated in step (b). This process enables the skilled person to choose fillers solely according to the purpose envisaged therefor without encountering technical problems or problems relating to the quality of the stereolithographically produced object resulting from sedimentation of the fillers during preparation of the object.