Heat-curable epoxy functional composition and transparent heat-cured caustic-resistant hard-coatings prepared therefrom

    公开(公告)号:AU2009356743B2

    公开(公告)日:2014-11-06

    申请号:AU2009356743

    申请日:2009-12-17

    Applicant: ESSILOR INT

    Inventor: VALERI ROBERT

    Abstract: A heat-curable composition comprises - from 25 to 65 % by weight of a mixture of epoxy-functional monomers, said mixture consisting of at least one polyfunctional epoxy monomer selected from monomers comprising from 4 to 8 glycidyl groups and/or cycloaliphatic epoxy groups, and at least one bi- or tri-functional epoxy monomer selected from monomers comprising two or three glycidyl groups and/or cycloaliphatic epoxy groups, - from 25 to 70 % by weight of at least one organic solvent selected from glycol monoethers, - from 2.5 to 5 % by weight, relative to the total weight of epoxyfunctional monomers (a) and (b), of at least one blocked strong acid catalyst, said heat-curable composition not containing any non-epoxyfunctional monomers, in particular not containing any acrylic, methacrylic or silane monomers.

    METHOD FOR PREPARING ANTISTATIC UV CURABLE HARDCOATINGS ON OPTICAL ARTICLES

    公开(公告)号:CA2823588A1

    公开(公告)日:2012-07-12

    申请号:CA2823588

    申请日:2011-01-04

    Applicant: ESSILOR INT

    Inventor: VALERI ROBERT

    Abstract: The present invention is drawn to a method for manufacturing antistatic UV-cured hard-coatings on optical articles, comprising (a) coating an organic or mineral optical substrate with an essentially anhydrous solution containing from 20 % to 90 % by weight, relative to the total dry matter of the solution, of at least one non hydrolyzed epoxyalkyltrialkoxysilane and at least 3.2 % by weight, relative to the total dry matter of the solution, of at least one photoinitiator selected from the group consisting of triarylsulfonium salts, diaryliodonium salts, and mixtures thereof, (b) curing the resulting coating by irradiation with UV-radiation, said method not comprising any hydrolysis step before the UV curing step.

    PROCEDE D'OBTENTION D'UN ARTICLE EN MATERIAU TRANSPARENT EXEMPT DE RAIES DE SURFACAGE VISIBLES ET ARTICLE OBTENU

    公开(公告)号:CA2612853A1

    公开(公告)日:2006-12-28

    申请号:CA2612853

    申请日:2006-06-22

    Applicant: ESSILOR INT

    Abstract: Procédé d'obtention d'un article transparent exempt de raies de surfaçage visibles, comprenant : l'obtention d'un substrat en un matériau transparent d'indice de réfraction ns, dont au moins une face principale a été ébauchée et polie à une valeur de Ra variant de 0,001 à 0,01 ~m mais qui présente des défauts de surface visibles sous la forme de fines rayures individualisées ; le dépôt directement sur la face principale ébauchée et polie du substrat d'une composition liquide, polymérisable, de revêtement de masquage présenta nt un angle de contact avec la face principale du substrat d'au plus 30~, et formant par polymérisation un revêtement de masquage ayant un indice de réfraction nc tel que 0,01

    Polymer composition and methods using said polymer composition to manufacture ophthalmic lens

    公开(公告)号:AU2013408697A1

    公开(公告)日:2016-07-07

    申请号:AU2013408697

    申请日:2013-12-20

    Applicant: ESSILOR INT

    Abstract: The present invention proposes a polymer composition of manufacturing ophthalmic lens by polymerization of polymerizable composition wherein the shrinkage phenomenon is minimized. The polymerizable composition comprised two different categories of monomers which are able during crosslinking to control and limit said chemical shrinkage. The present invention comprises also ophthalmic lens obtained from said polymer composition using a manufacturing process of casting or additive manufacturing.

    Method for preparing antistatic UV curable hardcoatings on optical articles

    公开(公告)号:AU2011353751A1

    公开(公告)日:2013-07-25

    申请号:AU2011353751

    申请日:2011-01-04

    Applicant: ESSILOR INT

    Inventor: VALERI ROBERT

    Abstract: The present invention is drawn to a method for manufacturing antistatic UV-cured hard-coatings on optical articles, comprising (a) coating an organic or mineral optical substrate with an essentially anhydrous solution containing from 20 % to 90 % by weight, relative to the total dry matter of the solution, of at least one non hydrolyzed epoxyalkyltrialkoxysilane and at least 3.2 % by weight, relative to the total dry matter of the solution, of at least one photoinitiator selected from the group consisting of triarylsulfonium salts, diaryliodonium salts, and mixtures thereof, (b) curing the resulting coating by irradiation with UV-radiation, said method not comprising any hydrolysis step before the UV curing step.

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