公开(公告)号：FR2750429A1

公开(公告)日：1998-01-02

申请号：FR9608031

申请日：1996-06-27

Applicant: ESSILOR INT

Inventor： MARCHIN BRIGITTE ,  BAUDE DOMINIQUE ,  VAIRON JEAN PIERRE ,  DOURGES MARIE ANNE ,  CHAUMONT PHILIPPE

IPC: C07C49/796 ,  C07C49/84 ,  C07F7/18 ,  C08F2/46 ,  C08F2/50 ,  C08G77/38 ,  C08L83/04 ,  G02C7/04 ,  C08L83/05 ,  C08L83/07 ,  G02B1/04 ,  C08G77/388 ,  C08F283/12 ,  C08J3/24 ,  C07C49/794

Abstract: The cross-linked silicone polymer based material comprises a cross-linked silicone polymer matrix and photoinitiator groupings dispersed and bound in the matrix. The use of this material in processes aiming at making the material hydrophilic greatly simplifies the processes and the resulting products have particularly interesting and advantageous characteristics. The invention is useful in the manufacture of contact lenses.

公开(公告)号：FR2811322A1

公开(公告)日：2002-01-11

申请号：FR0008937

申请日：2000-07-07

Applicant: ESSILOR INT

Inventor： VASSAL NATHALY ,  VAIRON JEAN PIERRE ,  CHARLEUX BERNADETTE ,  TARDIEU PASCALE ,  MAISONNIER SYLVETTE ,  CANO JEAN PAUL

IPC: G02C7/02 ,  C08G18/00 ,  C08G18/08 ,  C08G18/12 ,  C08G18/42 ,  C08G18/66 ,  C08K5/3437 ,  C08K5/357 ,  G02B5/23 ,  G02C7/10 ,  C08G18/83 ,  C08L75/04 ,  C09K9/02 ,  G02B1/10

Abstract: The method of the invention comprises : a) forming a hydrophilic polyurethane prepolymer with isocyanate end groups, by the polyaddition reaction of at least one polyol and at least one diisocyanate in the presence of at least one internal emulsifying agent; b) mixing the polyurethane prepolymer with a photochromic agent; c) adding water or a mixture of water and solvent, under agitation, to the mixture of the polyurethane prepolymer and the photochromic agent, to form an emulsion; and d) adding at least one chain extension agent to the emulsion and performing a chain extension reaction to give the final photochromic polyurethane latex. Application to the production of ophthalmic articles having photochromic properties.

公开(公告)号：FR2790264A1

公开(公告)日：2000-09-01

申请号：FR9902437

申请日：1999-02-26

Applicant: ESSILOR INT

Inventor： MAISONNIER SYLVETTE ,  TARDIEU PASCALE ,  CANO JEAN PAUL ,  WAJS GEORGES ,  VAIRON JEAN PIERRE ,  CHARLEUX BERNADETTE

IPC: C08F2/44 ,  G02B5/23 ,  C09K9/02 ,  C08F20/10 ,  G02B1/04 ,  G02B1/10 ,  G02C7/10

Abstract: The invention concerns a method for preparing a latex consisting in: preparing an aqueous emulsion (I) of a composition (A) comprising: at least an organic monomer Z with a C=C group, capable of free radical polymerisation, and one or several organic photochromic compound(s); and (2) polymerisation in the presence of a water-soluble initiator of composition A of organic monomer(s) to obtain said latex with photochromic properties. The invention is useful in ophthalmic optics.

公开(公告)号：FR2811322B1

公开(公告)日：2002-10-18

申请号：FR0008937

申请日：2000-07-07

Applicant: ESSILOR INT

Inventor： VASSAL NATHALY ,  VAIRON JEAN PIERRE ,  CHARLEUX BERNADETTE ,  TARDIEU PASCALE ,  MAISONNIER SYLVETTE ,  CANO JEAN PAUL

IPC: G02C7/02 ,  C08G18/00 ,  C08G18/08 ,  C08G18/12 ,  C08G18/42 ,  C08G18/66 ,  C08K5/3437 ,  C08K5/357 ,  G02B5/23 ,  G02C7/10 ,  C08G18/83 ,  C08L75/04 ,  C09K9/02 ,  G02B1/10

Abstract: The method of the invention comprises: a) forming a hydrophilic polyurethane prepolymer with isocyanate end groups, by the polyaddition reaction of at least one polyol and at least one diisocyanate in the presence of at least one internal emulsifying agent; b) mixing the polyurethane prepolymer with a photochromic agent; c) adding water or a mixture of water and solvent, under agitation, to the mixture of the polyurethane prepolymer and the photochromic agent, to form an emulsion; and d) adding at least one chain extension agent to the emulsion and performing a chain extension reaction to give the final photochromic polyurethane latex. Application to the production of ophthalmic articles having photochromic properties.

公开(公告)号：FR2750429B1

公开(公告)日：1998-08-07

申请号：FR9608031

申请日：1996-06-27

Applicant: ESSILOR INT

Inventor： MARCHIN BRIGITTE ,  BAUDE DOMINIQUE ,  VAIRON JEAN PIERRE ,  DOURGES MARIE ANNE ,  CHAUMONT PHILIPPE

IPC: C07C49/796 ,  C07C49/84 ,  C07F7/18 ,  C08F2/46 ,  C08F2/50 ,  C08G77/38 ,  C08L83/04 ,  G02C7/04 ,  C08L83/05 ,  C08L83/07 ,  G02B1/04 ,  C08G77/388 ,  C08F283/12 ,  C08J3/24 ,  C07C49/794

Abstract: This invention pertains to a process for the manufacture of a hydrophilic polymeric product, consisting in causing a material comprising a crosslinked silicone polymer matrix and photoinitiator groups dispersed and immobilized within the polymer matrix to swell in a swelling solution comprising a solvent for swelling the crosslinked silicone polymer of the matrix of the material, a photopolymerizable hydrophilic monomer and optionally a crosslinking agent and a proton- or electron-donating coinitiator compound, when the material comprises photoactivable photoinitiator groups and does not comprise proton- or electron-donating coinitiator groups causing the photopolymerizable hydrophilic monomer to diffuse into the swollen material, and polymerizing, by irradiation, the photopolymerizable hydrophilic monomer.