Abstract:
The invention relates to a method for preparing a colloidal solution of non-agglomerated zirconia particles, characterised in that it comprises the following steps: a) obtaining a zirconium hydroxide sol; b) adding to said sol a mineral acid according to a molar ratio [mineral acid]/[Zr]
Abstract:
The invention relates to a method for the non-electrolytic deposition of a compound, preferably an electrochromic compound, comprising the following successive steps: (a) an electroconductive layer is deposited on a non-conductive solid substrate; (b) a reducing agent or an oxidizing agent(= redox agent) is deposited on an area of said electroconductive layer, said area covering only a portion of the surface of said electroconductive layer; and (c) a solution of a precursor of the compound to be deposited is brought into contact both with the redox agent and with at least a portion of the area of said electroconductive layer not covered by the redox agent, said precursor being chosen from those having an oxidation-reduction potential higher or lower than the redox agent and forming, after an oxidation-reduction reaction, a compound insoluble in the solution of the precursor of the compound to be deposited.
Abstract:
The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials based on either single or two-core viologen systems and the use of these viologen systems as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Abstract:
The present invention relates to an electrochromic composition comprising at least one reducing compound and at least two oxidizing compounds, said at least two oxidizing compounds having similar oxydo-reduction potentials. More specifically, said at least two oxidizing compounds are selected from viologen derivatives. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Abstract:
The present invention relates to an electrochromic composition comprising at least one reducing compound, at least one oxidizing compound which is selected from specific viologen derivatives, and at least one dye. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
Abstract:
The invention relates to the sealing of a cellular structure (10) along a periphery that includes forming a furrow (S) in said structure, and depositing a portion (11) of a binding material in contact with the respective edges (B1, B3) of a bearing film (1) and of a sealing film (3) of the structure. The binding material may consist of a glue or a welding material. The binding material is cured for definitively connecting the bearing film and the sealing film along the periphery. Such a method is adapted for tightly closing a flexible cellular structure for the optical functionalisation of an ophthalmic lens, in particular when said structure is cut in a sheet.
Abstract:
The invention relates to an article having a nanotextured surface with superhydrophobic properties, comprising a network of preferably regular vertical tabs, characterised in that the tab network fulfils the following conditions: the surface fraction of the tabs Øs is such that 3% = Øs = 13%, preferably 5% = Øs = 12%, preferably 5% = Øs = 13%, even better 5.5% = Øs = 13%, even better 6% = Øs = 13%, and better still 8% = Øs = 13%; the pitch p of the network is such that 100nm = p = 250 nm; the height h of the tabs is such that 100nm = h = 400 nm, preferably 250 = h = 400 nm, even better 300 = h = 400 nm; and the lateral surface of the tabs is inclined at most by an angle of ± 20°, preferably ± 10° or even better ± 5°, in relation to the vertical axis of the tabs.
Abstract translation:本发明涉及具有超疏水性质的纳米纹理表面的制品,其包括优选规则的垂直突片的网络,其特征在于,所述突片网络满足以下条件:所述突出部分的表面部分使得3%=Øs= 13 %,优选5%=Øs= 12%,优选5%=Øs= 13%,甚至更好5.5%=Øs= 13%,甚至更好6%=Øs= 13%,更好仍为8%=Øs= 13% ; 网络的节距p使得100nm = p = 250nm; 片的高度h使得100nm = h = 400nm,优选250 = h = 400nm,甚至更好300 = h = 400nm; 并且翼片的侧表面相对于翼片的垂直轴线最多倾斜±20°,优选±10°或甚至更好±5°的角度。
Abstract:
A method for producing an article which is made of a transparent material and devoid of visible surface lines consists in producing a substrate which is made of a transparent material having a refractive index ns, whose at least main face is machined and polished in such a way that the Ra value thereof ranges from 0.001 to 0.1µm, but has visible surface defects in the form of thin individual scratches, in deposing, a liquid polymerisable composition of a masking coating, whose contact angle with said substrate main face is equal or less than 30° and which is formed by polymerising a masking coating having a refractive index nc such as 0.01
Abstract:
composto de fórmula (i) e seu método de preparação, composição eletrocrômica e dispositivo eletrocrômico. a presente invenção refere-se a um grupo de novos materiais eletrocrômicos. mais especificamente, ela se refere a materiais eletrocrômicos que se baseiam em sistemas viologênicos de um ou dois núcleos, e à utilização destes sistemas viologênicos como meio de transmissão variável para a fabricação de um artigo ótico, tal como uma lente oftálmica.