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：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：DE60135343D1

公开(公告)日：2008-09-25

申请号：DE60135343

申请日：2001-07-06

Applicant: ESSILOR INT

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

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

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：AT404601T

公开(公告)日：2008-08-15

申请号：AT01956517

申请日：2001-07-06

Applicant: ESSILOR INT

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

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

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：AU7847401A

公开(公告)日：2002-01-21

申请号：AU7847401

申请日：2001-07-06

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 ,  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.