公开(公告)号：US20230158760A1

公开(公告)日：2023-05-25

申请号：US17991174

申请日：2022-11-21

Applicant: Alcon Inc.

Inventor： Yongxing Qiu ,  Newton T. Samuel ,  John Dallas Pruitt ,  Chandana Kolluru ,  Arturo Norberto Medina ,  Lynn Cook Winterton ,  Daqing Wu ,  Xinming Qian ,  Jared Nelson

IPC: B29D11/00 ,  G02B1/04 ,  G02C7/04 ,  G02B1/10 ,  G02B1/18 ,  C08J7/04 ,  C08L83/04 ,  C08G77/388 ,  C08J5/00 ,  C09D5/16 ,  C09D133/02 ,  C09D133/14 ,  C09D133/26 ,  C09D171/02 ,  C09D177/06

CPC classification number: B29D11/00067 ,  C08G77/388 ,  C08J5/00 ,  C08J7/042 ,  C08L83/04 ,  C09D5/1637 ,  C09D5/1681 ,  C09D133/02 ,  C09D133/14 ,  C09D133/26 ,  C09D171/02 ,  C09D177/06 ,  G02B1/10 ,  G02B1/18 ,  G02B1/043 ,  G02C7/049 ,  C08J2383/04 ,  C08J2383/08 ,  C08J2433/02 ,  C08J2433/26 ,  C08J2487/00 ,  G02C2202/06 ,  G02C2202/16

Abstract: The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a watersoluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40° C. to about 140° C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.

公开(公告)号：US20220283338A1

公开(公告)日：2022-09-08

申请号：US17688041

申请日：2022-03-07

Applicant: Alcon Inc.

Inventor： Michelle Plavnik ,  Richard Charles Breitkopf ,  Steve Yun Zhang ,  Zahra Bassampour ,  Chandana Kolluru

IPC: G02B1/04 ,  B29D11/00 ,  C08G77/20

Abstract: Described herein is a method for producing a contact lens comprising a central photochromic zone that has a diameter of about 13 mm or less and is concentric with the central axis of the contact lens. The method comprises: applying a first polymerizable fluid composition containing at least one photochromic compound on a central portion of the molding surface of a female mold half to form a circular layer; partially photocuring, in situ, the circular layer in the female mold half by using a visible light; dispensing a second polymerizable fluid composition over the partially-cured circular layer on the molding surface of the female mold half; and a step of thermally curing the second polymerizable fluid composition and the partially-cured circular layer immersed therein in the mold cavity formed between the the molding surfaces of the female mold half and a male mold half.

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.

公开(公告)号：US20230004023A1

公开(公告)日：2023-01-05

申请号：US17838358

申请日：2022-06-13

Applicant: Alcon Inc.

Inventor： Zahra Bassampour ,  Chandana Kolluru ,  Steve Yun Zhang ,  Adam K. Sniady ,  Thomas M. Moy ,  Frank Chang ,  David Borja ,  Joseph Michael Lindacher ,  Ying Pi

IPC: G02C7/04 ,  C08J3/075 ,  C08G77/14

Abstract: The invention provides a delamination-resistant embedded silicone hydrogel contact lens having an insert that is embedded in a silicone hydrogel bulk material. The insert is made of a crosslinked polymeric material having a refractive index higher than that of the silicone hydrogel bulk material by at least 0.07 and comprises a diffractive structure disposed on one of the front and back curve surfaces of the insert for providing a diffractive power that contributes to the overall optical power of the contact lens.

公开(公告)号：US11534994B2

公开(公告)日：2022-12-27

申请号：US17146181

申请日：2021-01-11

Applicant: Alcon Inc.

Inventor： Yongxing Qiu ,  Newton T. Samuel ,  John Dallas Pruitt ,  Chandana Kolluru ,  Arturo Norberto Medina ,  Lynn Cook Winterton ,  Daqing Wu ,  Xinming Qian ,  Jared Nelson

IPC: B29D11/00 ,  G02B1/18 ,  G02B1/04 ,  G02C7/04 ,  G02B1/10 ,  C08J7/04 ,  C08L83/04 ,  C08G77/388 ,  C08J5/00 ,  C09D5/16 ,  C09D133/02 ,  C09D133/14 ,  C09D133/26 ,  C09D171/02 ,  C09D177/06

Abstract: The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves heating a silicone hydrogel contact lens in an aqueous solution in the presence of a water-soluble, highly branched, thermally-crosslinkable hydrophilic polymeric material having positively-charged azetidinium groups, to and at a temperature from about 40° C. to about 140° C. for a period of time sufficient to covalently attach the thermally-crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one azetidinium group and one of the reactive functional groups on and/or near the surface of the silicone hydrogel contact lens, thereby forming a crosslinked hydrophilic coating on the silicone hydrogel contact lens. Such method can be advantageously implemented directly in a sealed lens package during autoclave.