Essilor International (compagnie Generale D'optique)

Essilor International

Odile Primel

Leanirith Yean

Gilles Richard

Maxime Pillie

Tony Dantas De Morais

A radically polymerizable composition comprising:

Radically polymerizable composition resulting in shock resistant organic lenses

A lens has at least one insert (), which defines an optical path. For manufacturing the lens, the insert is first bonded to an overmould (). A polymer () is then moulded in a mould () formed on one of its faces from the overmould. After moulding, the overmould may be preserved and form part of the lens, if necessary after surface grinding. The overmould may also be separated from the lens; in this case, the lens is machined, removing at least part of the inserts. The lens obtained has an insert in a reproducible position, with an entrance or exit surface inducing no optical distortion.

Process for moulding a lens having an insert

The invention is a composition comprising: 40 to 95 parts by weight of one or several monomers (I) of formula (a) wherein: R and R represent H or CH; A represents a divalent radical of formula (b) or (c) wherein m and m represent each an integer ranging between 2 and 6; and 5 to 50 parts by weight of a monomer (II) comprising at least a urethane unit and at least two (meth)acrylate functions. The invention is useful for making optical and ophthalmic articles.

Polymerisable compositions for making transparent polymer substrates, resulting transparent polymer substrates and uses thereof in optics

Polymerisable compositions for making transparent polymer substrates, resulting transparent polymer substrates, and uses thereof in optics

Polymerizable compositions for manufacturing transparent polymeric substrates, resulting transparent polymeric substrates and their applications in the optical field

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Vincennes, France

Odile Primel