公开(公告)号：US20210009762A1

公开(公告)日：2021-01-14

申请号：US17038293

申请日：2020-09-30

Applicant: Alcon Inc.

Inventor： Steve Yun Zhang ,  Daqing Wu ,  Junhao Ge ,  Richard Charles Breitkopf ,  Xinming Qian ,  Zach Munoz ,  Matthew D. Nelson ,  Augustine Twum Kumi ,  Weihong Lang ,  Ying Zheng ,  Feng Jing ,  Frank Chang

IPC: C08G77/442 ,  C08G77/20 ,  C08G77/388 ,  C08G77/392 ,  C08G77/14 ,  C08L83/10 ,  G02B1/04 ,  C08G77/12 ,  B29D11/00 ,  G02C7/04

Abstract: The present invention generally relates to inherently wettable silicone hydrogel contact lenses having relatively high oxygen permeability, relatively high equilibrium water content and relatively low elastic modulus. The present invention is also related to a method for making such inherently wettable silicone hydrogel contact lenses.

公开(公告)号：US20200376787A1

公开(公告)日：2020-12-03

申请号：US16884512

申请日：2020-05-27

Applicant: Alcon Inc.

Inventor： Steve Yun Zhang ,  Changhong Yin ,  Richard Charles Breitkopf

IPC: B29D11/00 ,  G02B1/04 ,  C07F7/08 ,  C08L83/04

Abstract: The invention provides a thermal cast-molding method for producing colored silicone hydrogel contact lenses. The method of the invention comprises: (1) forming, on a molding surface of a mold, a transferable colored polymeric composite film which comprises or consists essentially of a first polymeric film, a second polymeric film and a cured colored image encapsulated therewithin; (2) dispensing a silicone hydrogel lens formulation into the lens-forming cavity of the mold; and (4) thermally curing the third polymerizable composition within the lens-forming cavity for at least about 40 minutes to form the colored silicone hydrogel contact lens, whereby the transferable, colored, and polymeric composite film detaches from the first or second molding surface and becomes integral with the body of the silicone hydrogel contact lens.

公开(公告)号：US20190300654A1

公开(公告)日：2019-10-03

申请号：US16365973

申请日：2019-03-27

Applicant: Alcon Inc.

Inventor： Daqing Wu ,  Steve Yun Zhang ,  Junhao Ge ,  Richard Charles Breitkopf ,  Augustine Twum Kumi ,  Weihong Lang

IPC: C08G77/442 ,  G02B1/04 ,  B29D11/00

Abstract: The invention provides a method for making silicone hydrogel contact lenses. The method of the invention is characterized by using an organic solvent as a processing-aid tool for controlling lens diameter without significantly affecting lens equilibrium water content during cast-molding of soft contact lenses from a polymerizable composition. By adjusting the weight percentage of the organic solvent in a polymerizable composition for making SiHy contact lenses, one can adjust lens diameter of produced SiHy lenses to meet target without affecting adversely the lens properties.