公开(公告)号：US20240399686A1

公开(公告)日：2024-12-05

申请号：US18678966

申请日：2024-05-30

Applicant: Alcon Inc.

Inventor： Zahra Bassampour ,  Steve Yun Zhang ,  Lilanni Perez ,  Ashanti Smith ,  Nicholas Gober ,  Ya-Wen Chang ,  Newton T. Samuel ,  Richard Charles Breitkopf

IPC: B29D11/00 ,  B29K23/00 ,  B29K83/00 ,  B29K105/00 ,  B29K105/20 ,  G02C7/04

Abstract: The invention provides a method for producing delamination-resistant embedded contact lenses involving use of a mold set in two-curing steps and a special lens-forming composition for forming a bulk hydrogel material for embedding a crosslinked polymeric insert. The mold set consists of three mold halves, one of which is used twice, the first time for molding an insert from an insert-forming composition and the second time for an embedded contact lens with the molded insert embedded therein from the special lens-forming composition that a vinylic crosslinking agent and or organic solvent both of which independent of each other can swell an insert by a moderate swelling degree. The resultant embedded hydrogel contact lenses can be free of deformation and delamination.

公开(公告)号：US20230357478A1

公开(公告)日：2023-11-09

申请号：US18313489

申请日：2023-05-08

Applicant: Alcon Inc.

Inventor： Newton T. Samuel ,  Cornelius Daniel Niculas ,  Richard Charles Breitkopf ,  Nicholas Gober ,  Chandana Kolluru ,  Zahra Bassampour ,  Steve Yun Zhang

IPC: C08F283/12

CPC classification number: C08F283/124

Abstract: A method for producing embedded hydrogel contact lenses comprises at least the following steps: depositing a small drop of a viscous lens-forming composition in the center of a female lens mold half; placing a preformed insert on top of the small drop precisely in the center of the female lens mold half so that the insert is held by capillary forces due to the presence of a thin layer of the viscous lens-forming composition between the insert and the molding surface of the female lens mold half; dosing an amount of another less viscous lens-forming composition on top of the insert to immerse the insert in the female lens mold half; closing tightly a male lens mold half onto the top of the female lens mold half halves to form a molding assembly; curing both the lens-forming compositions in the molding assembly to form an embedded hydrogel lens precursor.