Essilor International (compagnie Generale D'optique)

Nexans

Gilles Widawski

Peiqi Jiang

Gilbert Menduni

Leanirith Yean

Andreas Rietz

Friedrich Mueller

Jean-Paul Marchand

An elongate object (e.g., a cable) with at least one transmission element arranged in a core thereof, in which an outer sheath ( ) of insulation material is applied over the core. To achieve specific properties of the sheath ( ), the sheath is provided with a coating ( ) of a cross-linkable insulating material, which is very thin compared to the thickness of the sheath, and the individual properties of which are adjusted to the particular application of the object.

Elongate object with insulating coating

The invention concerns novel polymerisable compositions and optical lenses with high refractive index obtained from said compositions, characterized in that they comprise as constituents base copolymerisable monomers at least 85 wt. % of the total weight of copolymerisable monomers present in the composition: of a mixture M, for 100 parts by weight of the mixture; of (A) 20 to 80 parts of one or several, preferably only one, non-aromatic compounds (I) comprising two thio(meth)acrylate functions, and (B) 80 to 20 parts of a compound of formula (I) in which R and R represent, independently of each other, H or CH and m&plus;n has a mean value from 0 to 20 inclusively; and 3 to 30% by weight relative to the weight of mixture M of a polythiol; the composition containing less than 5 wt. % of other aromatic thio(meth)acrylate copolymerisable, cyclanic or vinyl aromatic mono(meth)acrylate monomers. The invention is applicable to the manufacture of spectacle lenses.

Polymerizable thioacrylate compositions and optical lenses with a high refractive index obtained from said compositions

The present invention relates to polymerizable compositions for the manufacture of optical lenses with a high refractive index and a high Abbe number, and optical lenses comprising these compositions.

Polymerizable compositions for making optical lens with high refractive index and high abbe number, and resulting lens

The current invention discloses an ophthalmic lens composed of a transparent organic polymer material with a high refractive index and a high Abbe number by copolymerization of a mixture of monomers comprising at least one polythiol monomer and at least one monomer with a high Abbe number comprising two to four bridged cyclic end groups comprising an intracyclic ethylenic double bond or a linear or branched aliphatic residue comprising an ethylenic unsaturation, preferably a vinyl or ethylidene group bonded directly to a carbon of the ring.

Optical lens in transparent organic polymer material with high refractive index and high Abbe number

The composition according to the invention comprises at least one polymerizable monomer with a labile proton, at least one polymerizable monomer with an iso(thio)cyanate group, a photoinitiating agent and an agent for activating the photoinitiator chosen from phosphines and phosphorus halides.

Photopolymerizable composition based on polyiso(thio)cyanate monomers and on monomers with a labile proton, comprising a photoinitiating agent and an agent for activating the photopolymerization and optical articles obtained

Growing community of inventors

Paris, France

Gilles Widawski