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    42.
    发明专利
    未知

    公开(公告)号：DE60206092T2

    公开(公告)日：2006-06-29

    申请号：DE60206092

    申请日：2002-03-20

    Applicant: ESSILOR INT

    Inventor： BORYSLAWSKI JOSEPH ,  KEITA GABRIEL ,  TURSHANI YASSIN YUSEF

    IPC: B29D11/00 ,  G02C7/04 ,  A61F2/16 ,  B29C31/04 ,  B29C39/00 ,  B29C39/02 ,  B29C39/24 ,  B29L11/00 ,  G02B3/00

    Abstract: A method for molding a plastic ophthalmic lens which comprises introducing a liquid polymerizable composition in a molding cavity of a two-piece mold through a filling nozzle in flow communication with the upper half of the molding cavity and spaced apart from the central vertical axis of the molding cavity up to the time the lower half of the molding cavity is filled. Then, tilting the mold to bring the filling in register with the central axis of the molding cavity and achieving full filling of the molding cavity. Thereafter, polymerizing the composition and recovering the lens.

    METHOD FOR MAKING TRANSPARENT POLYTHIOURETHANE SUBSTRATES INPARTICULAR OPTICAL SUBSTRATES
    45.
    发明专利
    METHOD FOR MAKING TRANSPARENT POLYTHIOURETHANE SUBSTRATES INPARTICULAR OPTICAL SUBSTRATES 未知

    公开(公告)号：CA2465796A1

    公开(公告)日：2003-05-15

    申请号：CA2465796

    申请日：2002-11-04

    Applicant: ESSILOR INT

    Inventor： TURSHANI YASSIN YUSEF ,  MCCLIMANS PAMELA ANNE ,  KEITA GABRIEL ,  OBORDO JOEY OLIVEROS

    IPC: C08G18/72 ,  C08G18/10 ,  C08G18/38 ,  G02B1/04

    Abstract: A method of fast curing polythiourethane transparent casted substrate, usabl e for making optical articles such as ophthalmic lenses, which comprises the steps of: 1) Providing a first componentA comprising a polythiourethane prepolymer having isocyanate or isothiocyanate end groups and a viscosity at 25 ~C ranging from 0.02 to 0.4 Pa.s; 2) Providing a second component B comprising a polythiourethane prepolymer having thiol (SH) end groups and a viscosity at 25 ~C ranging from 0.2 to 2.0 Pa.s; 3) Mixing together first an d second components A and B and filling a moulding cavity of a casting mould assembly with the resulting mixture ; 4) Curing said mixture to obtain a transparent solid substrate, said curing step comprising: a) a first step fo r polymerizing said mixture to obtain a gel within 1 to 10 minutes; and b) a second step of post-curing the gel to obtain the transparent solid substrate ; and 5) Recovering the transparent solid substrate from the mould.

    49.
    发明专利
    未知

    公开(公告)号：ES2114685T3

    公开(公告)日：1998-06-01

    申请号：ES94915196

    申请日：1994-04-29

    Applicant: ESSILOR INT

    Inventor： GARCIA RUBEN ,  KEITA GABRIEL ,  YEAN LEANIRITH

    IPC: C08F18/24 ,  C08F216/02 ,  C08F218/00 ,  G02B1/04

    Abstract: Polymer composition obtained by polymérization of a polymerizable composition comprising: at least 50 % by weight of a monomer or a mixture of monomers of formula (I) wherein X is formula (II) and R and R' are H or CH3; 0-50 % by weight of one or more allylic, vinyl, acrylic or methacrylic mono or poly functional comonomer(s) (II): 0.2-10 % based on the weight of components (I) + (II), of a compound of formula (III) wherein R4 and R5 are hydrogen or a radical, R4 or R5 is a hydrogen atom, while the other forms a C5 or C7-C10 ring with R2; R1, R2 and R3 are hydrogen, alkyl which can be substituted by OH and/or interruped by an ether, ester or ketone function.

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