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    Method for making photochromic contact lenses
    1.
    发明授权
    Method for making photochromic contact lenses 有权

    公开(公告)号：US12247169B2

    公开(公告)日：2025-03-11

    申请号：US18645497

    申请日：2024-04-25

    Applicant: Alcon Inc.

    Inventor： Feng Jing ,  Frank Chang ,  Houliang Tang

    IPC: B29D11/00 ,  C08F230/08 ,  C09K9/02 ,  G02B1/04 ,  B29K83/00 ,  B29K105/00

    Abstract: Described herein is a cost-effective and time-efficient method for producing photochromic contact lenses, in particular, preferably photochromic silicone hydrogel contact lenses, from a polymerizable composition comprising an unique selection and combination of main polymerizable components, a photochromic compound and a visible-light photoinitiator, based on the Lightstream Technology™. This invention also provides photochromic contact lenses or more preferably photochromic silicone hydrogel contact lenses made according to a method of the invention. A photochromic contact lens of the invention is capable of undergoing a reversible color change upon exposure to UV-irradiation or high-energy-violet light (HEVL) (with wavelengths from 380 nm to 440 nm).

    UV/HEVL-FILTERING SILICONE HYDROGEL CONTACT LENSES
    2.
    发明申请
    UV/HEVL-FILTERING SILICONE HYDROGEL CONTACT LENSES 有权

    公开(公告)号：US20240392055A1

    公开(公告)日：2024-11-28

    申请号：US18665682

    申请日：2024-05-16

    Applicant: Alcon Inc.

    Inventor： Troy Vernon Holland ,  Adam K. Sniady ,  Frank Chang

    IPC: C08F230/08 ,  B29D11/00 ,  B29K83/00 ,  B29K105/00 ,  G02B1/04 ,  G02C7/10

    Abstract: Described herein is a UV/HEVL-filtering SiHy contact lens that not only has a relatively high UV/HEVL filtering capability but also has an aesthetic appealing color. The bulk silicone hydrogel of the UV/HEVL-filtering SiHy contact lens comprises repeating units of (1) at least one hydrophilic vinylic monomer, (2) at least one siloxane-containing vinylic monomer and/or at least one polysiloxane vinylic crosslinker, (3) at least one UV-absorbing vinylic monomer having an absorption peak at a wavelength of from 280 nm and 380 nm, (4) a first HEVL-absorbing benzotriazole-containing vinylic monomer having an absorption peak at a wavelength of from 410 nm and 420 nm, (5) a second HEVL-absorbing benzotriazole-containing vinylic monomer having an absorption peak at a wavelength of from 415 nm and 425 nm, and (6) from about 90 ppm to about 300 ppm of repeating units of at least one polymerizable blue dye.

    UV/HEVL-FILTERING CONTACT LENSES
    6.
    发明公开
    UV/HEVL-FILTERING CONTACT LENSES 审中-公开

    公开(公告)号：US20230374306A1

    公开(公告)日：2023-11-23

    申请号：US18321435

    申请日：2023-05-22

    Applicant: Alcon Inc.

    Inventor： Frank Chang ,  Troy Vernon Holland ,  Adam K. Sniady ,  Houliang Tang

    IPC: C08L83/04 ,  C08J3/075

    CPC classification number: C08L83/04 ,  C08J3/075 ,  C08J2383/04 ,  C08J2471/02

    Abstract: Described herein is UV/HEVL-absorbing contact lens of the invention comprises a bulk hydrogel material that comprises repeating units of at least one UV-absorbing vinylic monomer, repeating units of at least one UV/HEVL-absorbing vinylic monomer, and derivatives of a reactive Cu(II)-porphyrin present in selected amounts and at a selected ratio. A UV/HEVL-filtering contact lens of the invention not only can provide Class I UV protection against UVA and UVB rays (i.e., filtering more than 90% of UVA and 99% of UVB rays) but also can mimics the natural crystalline lens of a human eye in providing HEVL protection.

    Polysiloxane vinylic crosslinkers with high refractive index
    9.
    发明授权
    Polysiloxane vinylic crosslinkers with high refractive index 有权

    公开(公告)号：US12297323B2

    公开(公告)日：2025-05-13

    申请号：US17700734

    申请日：2022-03-22

    Applicant: Alcon Inc.

    Inventor： Frank Chang ,  Thomas M. Moy ,  Adam K. Sniady

    IPC: C08G77/442 ,  C08G77/20 ,  C08G77/60 ,  G02B1/04 ,  C08G77/00

    Abstract: The invention provides a class of high RI polysiloxane vinylic crosslinkers. Each of the polysiloxane vinylic crosslinkers of the invention comprise (1) a polysiloxane segment comprising dimethylsiloxane units and aryl-containing siloxane units each having one methyl substituent and one organic substituent having up to 45 carbon atoms and at least one aryl moiety which is linked to Si atom through a linker having at least 2 (preferably 3) carbon atoms; (2) ethylenically-unsaturated groups. The invention also provides an insert or silicone hydrogel contact lens which comprises a crosslinked polymeric material comprising repeating units of at least one of such a class of high RI polysiloxane vinylic crosslinkers.

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