-
公开(公告)号：DE60215970D1
公开(公告)日：2006-12-21
申请号：DE60215970
申请日：2002-11-04
Applicant: ESSILOR INT
Inventor： KEITA GABRIEL , OBORDO OLIVEROS , MCCLIMANS ANNE , TURSHANI YUSEF
Abstract: A method of fast curing polythiourethane transparent casted substrate, usable for making optical articles such as ophthalmic lenses, which comprises the steps of: 1) Providing a first component A 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 and 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 for 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.
-
公开(公告)号：DE60215970T2
公开(公告)日：2007-07-26
申请号：DE60215970
申请日：2002-11-04
Applicant: ESSILOR INT
Inventor： KEITA GABRIEL , OBORDO OLIVEROS , MCCLIMANS ANNE , TURSHANI YUSEF
Abstract: A method of fast curing polythiourethane transparent casted substrate, usable for making optical articles such as ophthalmic lenses, which comprises the steps of: 1) Providing a first component A 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 and 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 for 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.
-
公开(公告)号：DE60215946T2
公开(公告)日：2007-09-13
申请号：DE60215946
申请日：2002-07-01
Applicant: ESSILOR INT
Inventor： JIANG PEIQI , ADILEH FADI , TURSHANI YUSEF , WEBER STEVEN
-
公开(公告)号：DE60213593T2
公开(公告)日：2007-08-02
申请号：DE60213593
申请日：2002-05-27
Applicant: ESSILOR INT
Inventor： WEBER STEVEN , TURSHANI YUSEF , WHITE SHAW , DANG THIEN , TATMAN MAY , KLEMM ARTHUR
Abstract: The invention relates to a method for forming from a mold optical articles. These methods are particularly useful in preparing ophthalmic articles such as ophthalmic lenses, having several optical coatings thereon. The invention also relates to ophthalmic articles produced by these methods.
-
公开(公告)号：DE69732485T2
公开(公告)日：2006-01-05
申请号：DE69732485
申请日：1997-07-16
Applicant: ESSILOR INT
Inventor： TURSHANI YUSEF , NEUZIL WILLIAM , BORYSLAWSKI JOSEPH
Abstract: Internal mold release compositions for molding polyurethane and polythiourethane is disclosed herein. The composition includes a mixture of: (a) a mono C2-C6 alkyl phosphate; (b) a di C2-C6 alkyl phosphate, wherein the alkyl groups of the di-alkyl phosphate may be the same or different, and wherein the alkyl groups of the mono- and di-alkyl phosphate may be the same or different; and (c) a C7-C18 mono- and/or di-alkyl phosphate. Also disclosed is a polymerizable composition which includes (a) one or more monomers containing two or more isocyanate groups; (b) one or more monomers containing two or more functional groups selected from a thiol group and a hydroxyl group; (c) a mixture of a mono- C2-C6 alkyl phosphate and a di- C2-C6 alkyl phosphate, wherein the alkyl groups of the di-alkyl phosphate may be the same or different and wherein the alkyl groups of the mono- and di-alkyl phosphate mixture may be the same or different, wherein the mono- C2-C6 alkyl phosphate is present in an amount of >/=20 wt %, based on the total weight of the mixture of the mono- C2-C6 alkyl phosphate and the di- C2-C6 alkyl phosphate. The composition can also optionally include the C7-C18 mono- and/or di-alkyl phosphate.
-
Patent Agency Ranking
公开(公告)号：DE60201600T2
公开(公告)日：2005-10-20
申请号：DE60201600
申请日：2002-04-30
Applicant: ESSILOR INT
Inventor： WANIGATUNGA SIRISOMA , TURSHANI YUSEF , JIANG PEIQI
IPC: C08G75/08
Abstract: A process for polymerizing episulfide monomers comprising the steps of:(c) mixing to an episulfide monomer or a mixture of episulfide monomers an effective amount of at least one photopolymerization catalyst selected from the group consisting of (cyclopentadienyl) ruthenium and osmium complexes and an effective amount of at least a co-catalyst selected from phosphonium salts, phosphines and amines; and(d) irradiating the mixture of (a) with an ultra-violet radiation to polymerize the mixture.
-
公开(公告)号：DE60215946D1
公开(公告)日：2006-12-21
申请号：DE60215946
申请日：2002-07-01
Applicant: ESSILOR INT
Inventor： JIANG PEIQI , ADILEH FADI , TURSHANI YUSEF , WEBER STEVEN
-
公开(公告)号：DE60213593D1
公开(公告)日：2006-09-14
申请号：DE60213593
申请日：2002-05-27
Applicant: ESSILOR INT
Inventor： WEBER STEVEN , TURSHANI YUSEF , WHITE SHAW , DANG THIEN , TATMAN MAY , KLEMM ARTHUR
Abstract: The invention relates to a method for forming from a mold optical articles. These methods are particularly useful in preparing ophthalmic articles such as ophthalmic lenses, having several optical coatings thereon. The invention also relates to ophthalmic articles produced by these methods.
-
公开(公告)号：DE69732485D1
公开(公告)日：2005-03-17
申请号：DE69732485
申请日：1997-07-16
Applicant: ESSILOR INT
Inventor： TURSHANI YUSEF , NEUZIL WILLIAM , BORYSLAWSKI JOSEPH
Abstract: Internal mold release compositions for molding polyurethane and polythiourethane is disclosed herein. The composition includes a mixture of: (a) a mono C2-C6 alkyl phosphate; (b) a di C2-C6 alkyl phosphate, wherein the alkyl groups of the di-alkyl phosphate may be the same or different, and wherein the alkyl groups of the mono- and di-alkyl phosphate may be the same or different; and (c) a C7-C18 mono- and/or di-alkyl phosphate. Also disclosed is a polymerizable composition which includes (a) one or more monomers containing two or more isocyanate groups; (b) one or more monomers containing two or more functional groups selected from a thiol group and a hydroxyl group; (c) a mixture of a mono- C2-C6 alkyl phosphate and a di- C2-C6 alkyl phosphate, wherein the alkyl groups of the di-alkyl phosphate may be the same or different and wherein the alkyl groups of the mono- and di-alkyl phosphate mixture may be the same or different, wherein the mono- C2-C6 alkyl phosphate is present in an amount of >/=20 wt %, based on the total weight of the mixture of the mono- C2-C6 alkyl phosphate and the di- C2-C6 alkyl phosphate. The composition can also optionally include the C7-C18 mono- and/or di-alkyl phosphate.
-
公开(公告)号：DE60201600D1
公开(公告)日：2004-11-18
申请号：DE60201600
申请日：2002-04-30
Applicant: ESSILOR INT
Inventor： WANIGATUNGA SIRISOMA , TURSHANI YUSEF , JIANG PEIQI
IPC: C08G75/08
Abstract: A process for polymerizing episulfide monomers comprising the steps of:(c) mixing to an episulfide monomer or a mixture of episulfide monomers an effective amount of at least one photopolymerization catalyst selected from the group consisting of (cyclopentadienyl) ruthenium and osmium complexes and an effective amount of at least a co-catalyst selected from phosphonium salts, phosphines and amines; and(d) irradiating the mixture of (a) with an ultra-violet radiation to polymerize the mixture.
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.019 seconds)
