METHOD FOR MAKING TRANSPARENT POLYTHIOURETHANE SUBSTRATES IN PARTICULAR OPTICAL SUBSTRATES

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 componentA comprising a polythiourethane prepolymer having isocyanate or isothiocyanate end groups and a viscosity a...

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Hauptverfasser:	OBORDO, JOEY OLIVEROS, KEITA, GABRIEL, TURSHANI, YASSIN YUSEF, MCCLIMANS, PAMELA ANNE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator	OBORDO, JOEY OLIVEROS KEITA, GABRIEL TURSHANI, YASSIN YUSEF MCCLIMANS, PAMELA ANNE
description	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 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 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.
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KEITA, GABRIEL ; TURSHANI, YASSIN YUSEF ; MCCLIMANS, PAMELA ANNE</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA2465796C3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>2011</creationdate><topic>CHEMISTRY</topic><topic>COMPOSITIONS BASED THEREON</topic><topic>MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS</topic><topic>METALLURGY</topic><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>ORGANIC MACROMOLECULAR COMPOUNDS</topic><topic>PHYSICS</topic><topic>THEIR PREPARATION OR CHEMICAL WORKING-UP</topic><toplevel>online_resources</toplevel><creatorcontrib>OBORDO, JOEY OLIVEROS</creatorcontrib><creatorcontrib>KEITA, GABRIEL</creatorcontrib><creatorcontrib>TURSHANI, YASSIN YUSEF</creatorcontrib><creatorcontrib>MCCLIMANS, PAMELA ANNE</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OBORDO, JOEY OLIVEROS</au><au>KEITA, GABRIEL</au><au>TURSHANI, YASSIN YUSEF</au><au>MCCLIMANS, PAMELA ANNE</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD FOR MAKING TRANSPARENT POLYTHIOURETHANE SUBSTRATES IN PARTICULAR OPTICAL SUBSTRATES</title><date>2011-01-04</date><risdate>2011</risdate><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 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; 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subjects	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP
title	METHOD FOR MAKING TRANSPARENT POLYTHIOURETHANE SUBSTRATES IN PARTICULAR OPTICAL SUBSTRATES
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