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公开(公告)号：US12111443B2
公开(公告)日：2024-10-08
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
CPC classification number: G02B1/043 , B29D11/00057 , B29D11/00067 , B29D11/00134 , B29D11/00192 , C08G77/20 , C08L83/04 , G02C7/04 , G02C7/102 , G02C7/108 , B29K2083/00 , B29K2105/0061 , B29K2995/0018 , C08L2201/10 , C08L2203/02 , C08L2312/00 , G02B2207/109
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 molding surfaces of the female mold half and a male mold half.
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公开(公告)号：US20240316886A1
公开(公告)日：2024-09-26
申请号：US18611772
申请日：2024-03-21
Applicant: Alcon Inc.
Inventor： James Reid Lisk, JR. , Thae Hoon An , Daryl Reece , Zahra Bassampour , Tudor Stanescu , Honghui Lu , Justin Joel Aguayo , Aaron Luke Leathley-Andrew , Chandana Kolluru
IPC: B29D11/00 , B29C33/42 , B29L11/00 , C08J3/24 , C09D133/26
CPC classification number: B29D11/00134 , B29C33/42 , C08J3/243 , C09D133/26 , B29L2011/0041
Abstract: The invention is directed to a cast molding method for making embedded hydrogel contact lenses. The method comprises a step of actinically curing a lens-forming composition in specific locations in molding assemblies each of which is formed from one male lens mold half and one female insert mold half having a molded insert adhered thereon and comprises the lens-forming composition filling a gap between the back surface of the mold insert and the molding surface of the male lens mold half. This tack curing step ensures molded inserts adhered through multiple spots to the molding surface of each male lens mold halves which in turn will be used together with a female lens mold half in cast-molding of a lens forming composition to form an embedded silicone hydrogel contact lens.
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公开(公告)号：US11629255B2
公开(公告)日：2023-04-18
申请号：US17205212
申请日：2021-03-18
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Jing Cheng , Steve Yun Zhang
IPC: C08L83/06 , C08F220/12 , C08G77/442 , G02B1/04
Abstract: The invention is generally related to an embedded silicone hydrogel contact lens comprising a silicone hydrogel material and a hydrophobic insert. The silicone hydrogel material comprises repeating units of at least one first polysiloxane vinylic crosslinker comprising hydrophilized siloxane units each having one methyl substituent and one organic radical including at least one H-bond donor (e.g., hydroxyl groups), wherein the content of said at least one H-bond donor is at least 0.8 meq/g relative to the molecular weight of said at least one first polysiloxane vinylic crosslinker. The hydrophobic insert is composed of a crosslinked polymeric material comprising at least 40% by mole of acrylic repeating units and at least 6% by mole of repeating units of at least one vinylic crosslinking agent. The embedded silicone hydrogel is not susceptible to delamination.
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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
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.
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