Abstract:
The present invention relates to photovoltaic devices which comprise: a semiconducting material able to ensure a photovoltaic effect when it is subject to electromagnetic radiation; a anti-reflective layer, transparent towards said electromagnetic radiation ensuring the photovoltaic effect, this anti-reflective layer containing, in the dispersed state, objects with dimensions of less than 5 microns, preferably less than 2 microns, said objects comprising at least two areas consisting of two different substrates, transparent towards said electromagnetic radiation and having distinct refraction indices, i.e.: a core having a first refractive index nC; and a layer surrounding the core, a so-called crust, having a second refractive index nE, distinct from the refractive index nC of the core, the ratio of the dimensions of the core to the dimensions of the core/crust assembly being comprised 1:1.5 and 1:5.
Abstract:
The present invention relates to a surface treatment method with which anti-reflection properties toward electromagnetic radiation may be imparted to the surface of a substrate. A transparent coating toward said electromagnetic radiation is deposited on said surface, which contains in the dispersed state within said layer, objects with dimensions of less than 5 microns comprising: a core with a first refractive index nC, and a layer, a so-called skin, surrounding the core, having a second refractive index nE distinct from the refractive index nC of the core wherein the ratio of the dimensions of the core to the dimensions of the core/skin assembly is comprised between 1:15 and 1:5. The invention also relates to the coated substrates obtained according to this method.
Abstract:
The invention relates to a photosensitive adhesive composition of the polymerisable resin type, the hardening of which occurs by means of polymerisation and/or reticulation, characterised in comprising:—initiating means for at least one chain polymerisation reaction to guarantee the hardening of said composition and a sufficient quantity of at least one bifunctional monomer, comprising a photolabile centre with at least one photolabile entity and at least two polymerisable units, connected by covalent skeletons to said photolabile centre and located away from the cleavage sites of said photolabile centre, such that said composition loses the integrity and adhesivity thereof under the influence of a reticulating radiation causing the cleavage of the photolabile sites. The composition is particularly of application in dentistry.
Abstract:
The present invention relates to photovoltaic devices which comprise: a semiconducting material able to ensure a photovoltaic effect when it is subject to electromagnetic radiation; a anti-reflective layer, transparent towards said electromagnetic radiation ensuring the photovoltaic effect, this anti-reflective layer containing, in the dispersed state, objects with dimensions of less than 5 microns, preferably less than 2 microns, said objects comprising at least two areas consisting of two different substrates, transparent towards said electromagnetic radiation and having distinct refraction indices, i.e.: a core having a first refractive index nC; and a layer surrounding the core, a so-called crust, having a second refractive index nE, distinct from the refractive index nC of the core, the ratio of the dimensions of the core to the dimensions of the core/crust assembly being comprised 1:1.5 and 1:5.
Abstract:
The present invention relates to a method for preparing macromolecular species with a modified surface, comprising a step (e) in which macromolecular species (M), initially carrying —OH and/or —SH functions, are brought into contact with: a catalyst (C) carrying at least one conjugated guanidine function; and reactive species (E), comprising reactive groups including: (i) at least one group including an a,b-unsaturated carbonyl group C═C—C═O and/or an a,b-unsaturated thiocarbonyl group C═C—C═S; and/or (ii) at least one heterocyclic group comprising from 3 to 5 ring members, said group being selected from cyclic ethers, cyclic thioethers and aziridine rings; and/or (iii) at least one group selected from isocyanate —N═C═O or thioisocyanate —N═C═S groups, and trivalent groups of formula >C═CZ—, where Z is an electron-withdrawing group. The invention also relates to the macromolecular species with a modified surface that are obtained in this context.
Abstract translation:本发明涉及一种制备具有改性表面的高分子物质的方法,其包括步骤(e),其中最初携带-OH和/或-SH官能团的高分子物质(M)与下列物质接触:催化剂( C)携带至少一种共轭胍功能; 和反应性物质(E),其包含反应性基团,包括:(i)至少一个包含a,b不饱和羰基C = C-C = O和/或a,b-不饱和硫代羰基C = C- C = S 和/或(ii)至少一个包含3至5个环成员的杂环基,所述基团选自环醚,环硫醚和氮丙啶环; 和/或(iii)选自异氰酸酯-N = C = O或硫代异氰酸酯-N = C = S基团中的至少一个基团,以及式为C = CZ-的三价基团,其中Z为吸电子基团。 本发明还涉及在本文中获得的具有改性表面的大分子物质。
Abstract:
The present invention relates to a method for preparing macromolecular species with a modified surface, comprising a step (e) in which macromolecular species (M), initially carrying —OH and/or —SH functions, are brought into contact with: a catalyst (C) carrying at least one conjugated guanidine function; and reactive species (E), comprising reactive groups including: (i) at least one group including an a,b-unsaturated carbonyl group C═C—C═O and/or an a,b-unsaturated thiocarbonyl group C═C—C═S; and/or (ii) at least one heterocyclic group comprising from 3 to 5 ring members, said group being selected from cyclic ethers, cyclic thioethers and aziridine rings; and/or (iii) at least one group selected from isocyanate —N═C═O or thioisocyanate —N═C═S groups, and trivalent groups of formula >C═CZ—, where Z is an electron-withdrawing group. The invention also relates to the macromolecular species with a modified surface that are obtained in this context.
Abstract:
A photosensitive adhesive composition of the polymerizable resin type, the hardening of which occurs by polymerization and/or reticulation, includes:—initiators for at least one chain polymerization reaction to guarantee the hardening of the composition and a sufficient quantity of at least one bifunctional monomer, including a photolabile center with at least one photolabile entity and at least two polymerizable units, connected by covalent skeletons to the photolabile center and located away from the cleavage sites of the photolabile center, such that the composition loses the integrity and adhesivity thereof under the influence of a reticulating radiation causing the cleavage of the photolabile sites. The composition is particularly of application in dentistry.