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公开(公告)号：US20220126541A1
公开(公告)日：2022-04-28
申请号：US17512431
申请日：2021-10-27
Applicant: Alcon Inc.
Inventor： Junhao Ge , Yuan Chang , Steve Yun Zhang , Michelle Plavnik , Augustine Twum Kumi , Daqing Wu
IPC: B29D11/00 , G02C7/04 , G02C7/10 , C08F230/08
Abstract: Described herein is a method for producing photochromic silicone hydrogel contact lenses in a relatively efficient and consistent manner from a polymerizable composition under a controlled thermal curing scheme. The main polymerizable components in the polymerizable composition are a high radical-reactive hydrophilic (meth)acrylamido monomer, a high radical-reactive siloxane-containing (meth)acrylamido monomer, and a polysiloxane vinylic crosslinker(s) free of low-reactive ethylenically unsaturated group as the main crosslinker. The thermal free radical initiator having a 10 hour half-life temperature (T10hλ) of from about 50° C. to about 90° C. The controlled thermal curing scheme includes maintaining a first curing temperature of from about (T10hλ−20)° C. to about T10hλ° C. for a first curing time and maintaining a second curing temperature of from about (T10hλ+10)° C. to about (T10hλ+35)° C. for a second curing time.
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公开(公告)号：US20220326412A1
公开(公告)日：2022-10-13
申请号：US17710224
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Ying Pi , Cornelius Daniel Niculas , Yang Zheng , Steve Yun Zhang , Michelle Plavnik , Ethan Leveillee , Jing Cheng , Augustine Twum Kumi
IPC: G02B1/04 , C08G77/442 , B29D11/00 , G02C7/04
Abstract: The invention is directed to an embedded hydrogel contact lens, which comprises an insert sandwiched between two layers of hydrogel materials and can be produced according to a cast molding method including the procedures involving two females halves (FC1 and FC2) and two male halves (BC1 and BC2) and three consequential molding steps involving three molding assemblies: the 1st one formed between FC1 and BC1 for molding an insert; the 2nd one formed between FC1 and BC2 for molding a lens precursor having the molded insert embedded in a layer of a hydrogel material in a way that the front surface of the molded insert merges with the convex surface of the lens precursor; and the 3rd one formed between FC2 and BC2 for molding an embedded hydrogel contact of the invention.
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公开(公告)号：US11945181B2
公开(公告)日：2024-04-02
申请号：US17512431
申请日：2021-10-27
Applicant: Alcon Inc.
Inventor： Junhao Ge , Yuan Chang , Steve Yun Zhang , Michelle Plavnik , Augustine Twum Kumi , Daqing Wu
IPC: B29D11/00 , C08F230/08 , G02C7/04 , G02C7/10 , B29K33/00 , B29K83/00 , B29K105/00
CPC classification number: B29D11/00653 , B29D11/00076 , B29D11/00134 , C08F230/08 , G02C7/04 , G02C7/102 , B29K2033/26 , B29K2083/00 , B29K2105/0002 , B29K2105/0061 , B29K2823/10 , B29K2995/0046 , B29K2995/0065
Abstract: Described herein is a method for producing photochromic silicone hydrogel contact lenses in a relatively efficient and consistent manner from a polymerizable composition under a controlled thermal curing scheme. The main polymerizable components in the polymerizable composition are a high radical-reactive hydrophilic (meth)acrylamido monomer, a high radical-reactive siloxane-containing (meth)acrylamido monomer, and a polysiloxane vinylic crosslinker(s) free of low-reactive ethylenically unsaturated group as the main crosslinker. The thermal free radical initiator having a 10 hour half-life temperature (T10hλ) of from about 50° C. to about 90° C. The controlled thermal curing scheme includes maintaining a first curing temperature of from about (T10hλ−20)° C. to about T10hλ° C. for a first curing time and maintaining a second curing temperature of from about (T10hλ+10)° C. to about (T10hλ+35)° C. for a second curing time.
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公开(公告)号：US11886045B2
公开(公告)日：2024-01-30
申请号：US17518423
申请日：2021-11-03
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Steve Yun Zhang , Michelle Plavnik , Augustine Twum Kumi
CPC classification number: G02C7/049 , B29D11/00048 , C08J7/18 , G02B1/043 , G02C7/102 , C08J2300/00 , C08J2451/00
Abstract: Described herein is a method for producing photochromic contact lenses, in particular, photochromic silicone hydrogel contact lenses. The method comprises a step of cast molding of a lens-forming composition including an iniferter to form an unprocessed contact lens having iniferter moieties covalently incorporated into its polymer matrix and a step of iniferter-induced graft-polymerization of a photochromic vinylic monomer to the polymer matrix only in its central region which is circular and concentric with the central axis of the unprocessed contact lens. The obtained photochromic contact lens has a central pupillary region that only can undergo a reversible color change upon exposure to UV/HEVL-radiation.
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公开(公告)号：US20230382065A1
公开(公告)日：2023-11-30
申请号：US18322651
申请日：2023-05-24
Applicant: Alcon Inc.
Inventor： Jing Cheng , Michelle Plavnik , Ya-Wen Chang , Feng Jing , Steve Yun Zhang
IPC: B29D11/00
CPC classification number: B29D11/00134 , B29D11/00442 , B29D11/0048
Abstract: A method for producing embedded hydrogel contact lenses comprises at least the following steps: obtaining an insert made of a crosslinked polymeric material comprising repeating units of a free-radical photoinitiator; placing the insert in a female lens mold half; dosing an amount of a lens-forming composition 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; actinically curing both the lens-forming composition in the molding assembly to form an embedded hydrogel lens precursor which comprises a bulk hydrogel material formed the lens-forming composition and the insert that is embedded therein and covalently linked to the bulk hydrogel material.
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Patent Agency Ranking
公开(公告)号：US12194699B2
公开(公告)日：2025-01-14
申请号：US17710199
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Junhao Ge , Yang Zheng , Cornelius Daniel Niculas , David Andrew Icenogle , Jing Cheng , Yuan Chang , Augustine Twum Kumi , Michelle Plavnik
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses involving a set of 3-mold halves consisting essentially of: one female lens mold half having a molding surface defining the anterior surface of a contact lens; one male lens mold half having a molding surface defining the posterior surface of the contact lens; and an insert mold half having a molding surface defining one of the front and back surfaces of an insert. One of the lens mold halves is used twice: first with the insert mold half for molding an insert during first curing process and then with the other lens mold half for molding an embedded hydrogel contact lens with the molded insert embedded partially or fully therein during second curing process. The invention also relates to embedded hydrogel contact lenses produced from a method of the invention.
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公开(公告)号：US11833771B2
公开(公告)日：2023-12-05
申请号：US17710248
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Steve Yun Zhang , Michelle Plavnik , Yang Zheng , Jing Cheng , Augustine Twum Kumi
CPC classification number: B29D11/00134 , C08L83/14 , G02C7/04 , G02C7/102 , B29K2083/00 , C08L2203/02 , C08L2205/03
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, in the center of the molding surface of a male mold half, a drop (having a volume of about 5 μL or less) of a first polymerizable fluid composition containing at least one photochromic compound and a relatively-high molecular weight polysiloxane vinylic crosslinker for increasing the viscosity and adhesion on the molding surface of the male mold half; dosing a second polymerizable fluid composition in a female mold hald; closing the female mold hald with the male mold half with the drop thereon to form a molding assembly; and curing the second polymerizable fluid composition and the drop of the first polymerizable fluid composition in the molding assembly.
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公开(公告)号：US20220339895A1
公开(公告)日：2022-10-27
申请号：US17710248
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Yuan Chang , Junhao Ge , Steve Yun Zhang , Michelle Plavnik , Yang Zheng , Jing Cheng , Augustine Twum Kumi
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, in the center of the molding surface of a male mold half, a drop (having a volume of about 5 μL or less) of a first polymerizable fluid composition containing at least one photochromic compound and a relatively-high molecular weight polysiloxane vinylic crosslinker for increasing the viscosity and adhesion on the molding surface of the male mold half; dosing a second polymerizable fluid composition in a female mold hald; closing the female mold hald with the male mold half with the drop thereon to form a molding assembly; and curing the second polymerizable fluid composition and the drop of the first polymerizable fluid composition in the molding assembly.
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公开(公告)号：US20220324187A1
公开(公告)日：2022-10-13
申请号：US17710199
申请日：2022-03-31
Applicant: Alcon Inc.
Inventor： Zahra Bassampour , Chandana Kolluru , Steve Yun Zhang , Junhao Ge , Yang Zheng , Cornelius Daniel Niculas , David Andrew Icenogle , Jing Cheng , Yuan Chang , Augustine Twum Kumi , Michelle Plavnik
Abstract: The invention relates to a method for producing embedded hydrogel contact lenses involving a set of 3-mold halves consisting essentially of: one female lens mold half having a molding surface defining the anterior surface of a contact lens; one male lens mold half having a molding surface defining the posterior surface of the contact lens; and an insert mold half having a molding surface defining one of the front and back surfaces of an insert. One of the lens mold halves is used twice: first with the insert mold half for molding an insert during first curing process and then with the other lens mold half for molding an embedded hydrogel contact lens with the molded insert embedded partially or fully therein during second curing process. The invention also relates to embedded hydrogel contact lenses produced from a method of the invention.
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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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