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1. (US20040012002) Method for preparing a photochromic polyurethane latex and application to ophthalmic optics

Office : United States of America
Application Number: 10332287 Application Date: 06.07.2001
Publication Number: 20040012002 Publication Date: 22.01.2004
Grant Number: 7608207 Grant Date: 27.10.2009
Publication Kind : B2
Prior PCT appl.: Application Number:EP01007771 ; Publication Number: Click to see the data
IPC:
G02B 5/22
G02B 5/23
G02C 7/02
C08G 18/00
C08G 18/08
C08G 18/12
C08G 18/42
C08G 18/66
C08K 5/00
C08K 5/3437
C08K 5/357
G02C 7/00
G02C 7/10
G03C 1/72
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5
Optical elements other than lenses
20
Filters
22
Absorbing filters
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5
Optical elements other than lenses
20
Filters
22
Absorbing filters
23
Photochromic filters
G PHYSICS
02
OPTICS
C
SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7
Optical parts
02
Lenses; Lens systems
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18
Polymeric products of isocyanates or isothiocyanates
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18
Polymeric products of isocyanates or isothiocyanates
06
with compounds having active hydrogen
08
Processes
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18
Polymeric products of isocyanates or isothiocyanates
06
with compounds having active hydrogen
08
Processes
10
Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
12
using two or more compounds having active hydrogen in the first polymerisation step
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18
Polymeric products of isocyanates or isothiocyanates
06
with compounds having active hydrogen
28
characterised by the compounds used containing active hydrogen
40
High-molecular-weight compounds
42
Polycondensates having carboxylic or carbonic ester groups in the main chain
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
18
Polymeric products of isocyanates or isothiocyanates
06
with compounds having active hydrogen
28
characterised by the compounds used containing active hydrogen
65
Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
66
Compounds of groups C08G18/42, C08G18/48, or C08G18/52111
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
K
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
5
Use of organic ingredients
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
K
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
5
Use of organic ingredients
16
Nitrogen-containing compounds
34
Heterocyclic compounds having nitrogen in the ring
3412
having one nitrogen atom in the ring
3432
Six-membered rings
3437
condensed with carbocyclic rings
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
K
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
5
Use of organic ingredients
16
Nitrogen-containing compounds
34
Heterocyclic compounds having nitrogen in the ring
35
having also oxygen in the ring
357
Six-membered rings
G PHYSICS
02
OPTICS
C
SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7
Optical parts
G PHYSICS
02
OPTICS
C
SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
7
Optical parts
10
Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
C
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR OR STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
1
Photosensitive materials
72
Photosensitive compositions not covered by groups G03C1/005-G03C1/705102
Applicants: Essilor International Compagnie Generale d'Optique
Inventors: Vassal Nathaly
Vairon Jean-Pierre
Charleux Bernadette
Tardieu Pascale
Maisonnier Sylvette
Cano Jean-Paul
Agents: Fulbright &; Jaworski L.L.P.
Priority Data: 00008937 07.07.2000 FR
Title: (EN) Method for preparing a photochromic polyurethane latex and application to ophthalmic optics
Abstract: front page image
(EN)

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.