Essilor International (Compagnie Generale D'optique)

Satisloh Ag

Essilor International

Annette Cretier

Jean-Paul Cano

Gerhard Keller

Mamonjy Cadet

Eric Roussel

Pierre Caron

Charlotte Saint-Lu

Yves Aiguebonne

Annick Gascons

Christelle Clipet

The present invention relates to a dry wipe comprising a woven or knitted microfiber fabric having hydrophilic polymer microfibers and lipophilic polymer microfibers, which is impregnated with at least one surfactant, the hydrophilic/lipophilic balance (HLB) of which is greater than or equal to 5. These wipes can be used to clean the surface of substrates and/or to confer demisting properties on hydrophilic surfaces.

Dry wipe with demisting and/or cleaning action

The present invention relates to an optical article comprising a substrate coated with a coating preferably comprising silanol groups on its surface and, directly contacting this coating, an antifog coating precursor coating, said precursor coating preferably having a static contact angle with water of more than 10&#xb0; and of less than 50&#xb0; and being obtained through the grafting of at least one organosilane compound possessing a polyoxyalkylene group and at least one silicon atom bearing at least one hydrolyzable group, and is further coated with a film obtained by applying a composition containing at least one surfactant of formula F(CF)&#x2014;(CH&#x2014;CHO)H (VIII), wherein x is an integer ranging from 1 to 14, y is an integer lower than or equal to 10, compounds of formula (VIII) in which y=6 representing at least 90% by weight by weight, relative to the weight of compounds (VIII) present in the composition, so as to form an antifog coating, having preferably a static contact angle with water lower than or equal to 10&#xb0;.

Optical article comprising a surfactant-based temporary antifog coating with an improved durability

An optical article includes a substrate having a main surface coated with an antireflection coating and, directly contacting the antireflection coating, a precursor coating of an antifog coating obtained through the grafting on the antireflection coating of at least one compound B bearing a polyoxyalkylene group, the coating precursor of the antifog coating being coated with a surfactant film so as to form an antifog coating. The surfactant film contains at least one surfactant A having a sorbitan ring hydroxyl groups functionalized with OH-terminated polyoxyalkylene groups and R1 groups of formula:&#x2014;(RO)&#x2014;(Y)&#x2014;R', in which Ris an alkylene group, z is an integer &#x3e;1, Y is a divalent group, n2 is 0 or 1 and R&#x2032; is a saturated hydrocarbon group having 12 to 19, preferably 13 to 19 carbon atoms. Surfactants A provide a visual indication whether or not the antifogging effect will still be long-lasting.

Optical article comprising a temporary antifog coating based on sorbitan surfactants

Method for dip treatment of an optical element, wherein the optical element is held, while it is being dipped, by a holding ring, the ring including a hoop for draining and encircling a peripheral edge of the optical element, thereby exerting continuous linear contact with the peripheral edge, the hoop forming an arc over more than 180&#xb0; and being provided at each of its two ends with an outwardly-directed drip tab pointing away from the optical element.

Method for holding a lens for dip treatment thereof

An optical item comprising an organic or mineral glass substrate () and a transparent polymeric material layer (), characterized in that it comprises at least one intermediate layer () in direct contact with one main side of the substrate and the polymeric material layer, the intermediate layer(s) being made of particles of at least one colloidal mineral oxide and optionally of a binder, such (an) intermediate layer(s) having an initial porosity, and the initial porosity of the intermediate layer(s) being filled either by material from the polymeric material layer or by the substrate material if the latter is made in an organic glass and, optionally partly by the binder when present, so that the intermediate layer(s), after initial porosity filling, each represent a quarter waveplate with a wavelength in the range from 400 to 700 nm, preferably from 450 to 650 nm.

Growing community of inventors

Charenton le Pont, France

Annette Cretier