Abstract:
La présente invention vise un procédé de texturation de surfaces conférant à celles-ci un caractère superhydrophobe, superoléophobe, superhydrophile ou encore superoléophile. Ce procédé comprend i) une étape de texturation de la surface (via le dépôt de nanoparticules de tailles différentes), ii) une étape de réticulation de la surface ainsi texturée (par un agent réticulant), et éventuellement iii) une étape de modification des propriétés de surface par des molécules perfluorées (et donc hydrophobes). Ce procédé est adapté, entre autres, au traitement de surfaces et de matériaux thermosensibles et/ou transparents. En effet, aucune des étapes du procédé n'utilise une température supérieure à 100°C. Ainsi, le procédé de l'invention est particulièrement adapté pour traiter des surfaces transparentes composées de matériaux non minéraux comme par exemple le polycarbonate, dont il n'affectera ni la transparence ni les propriétés optiques.
Abstract:
The invention relates to a method for functionalising a surface of a solid substrate with at least one acrylic acid polymer layer, said method comprising the steps of: i) placing said surface in contact with a solution consisting of at least one acrylic acid homopolymer, a solvent and, optionally, metal salts; ii) removing the solvent from the solution in contact with said surface; and iii) binding the polymer to said surface by thermal treatment.
Abstract:
A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer, wherein the method includes: (i) applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; (ii) treating the thin film polyamide layer with a polyfunctional arene compound; and (iii) exposing the thin film polyamide layer to nitrous acid; wherein the polar and non-polar solutions further comprises at least one of the following: (A) at least one of the solutions further comprises a tri-hydrocarbyl phosphate compound represented by Formula (I): and (B) the non-polar solution further comprises an acid-containing monomer comprising a C 2 ―C 20 hydrocarbon moiety substituted with at least one carboxylic acid functional group or salt thereof and at least one amine-reactive functional group.
Abstract:
The invention relates to a method of coating an aged coating layer on a substrate and a coating composition which can be used in this method. The coating composition, is typically a fouling release coating composition, and comprises a curable or crosslinkable organosiloxane polymer, an organobismuth compound and a silane coupling agent.
Abstract:
Method and apparatus for protecting a metal substrate from corrosion. The method comprises generating an acid organic-inorganic hybrid sol-gel; providing a polyaniline solution; combining the sol-gel with the polyaniline solution; incorporating a polysiloxane within the organic-inorganic hybrid sol-gel, the polyaniline solution or the combined sol- gel and polyaniline solution; coating the substrate with the polysiloxane sol-gel polyaniline solution; and curing the coating at the substrate, such that the coating is chemically bonded to the substrate, the coating comprising a polysiloxane based network having a Si-0 backbone.
Abstract:
There are described q oligomer-polymer composition [optionally substantially free of styrene ( =20 wt-% of a higher itaconate diester (preferably dibutyl itaconate -DBI); (b) less than 23 wt-% acid monomer but also sufficient to have an acid value less than 150 mg KOH/g of polymer, (c) optionally with less than 50 wt-% of other itaconate monomers, and (d) optionally less than 77 wt-%of other monomers not (a) to (c). The DBI may be biorenewable. One embodiment is an aqueous dispersion of vinyl sequential polymer of two phases: A) 40 to 90 wt-% of a vinyl polymer A with Tg from -50 to 30°C; and B) 10 to 60 wt-% of a vinyl polymer B with Tg from 50 to 130°C; where DBI is used to prepare A and/or B and polymer A has from 0.1 to 10 wt-% of at least one acid-functional olefinically unsaturated monomer. Another embodiment is an aqueous polymer coating composition of a vinyl oligomer C of Mw from 1,000 to 150,000 g/mol and an acid value > 5 mgKOH/g; and a vinyl polymer D of Mw >= 80,000 g/mol and an acid value
Abstract:
There is described a polymer blend of a first and second polymer comprising: a) a first polymer of: vinyl (co)polymer; alkyd; urethane acrylic copolymer; polyurethane and/or polyester; b) a second copolymer from: b1) optionally at least 10 wt-% of one or derivatives of itaconic acid and/or isomers thereof; b2) up to 20 wt-% of one or more acid functional (or potentially acid functional) monomer(s)and b3) vinyl monomer(s) where wt% of each monomer (b1 to b3) is based on total (b) and where at least one of the first and second polymer is obtained from an itacon-functional monomer such as itaconic acid and/or its derivatives.
Abstract:
A composite sheet is manufactured by depositing a multi-layer coating on the outer surface of a substrate, the coating comprising a metal layer and an outer polymeric layer formed from a precursor comprising a polymerizable composition that includes a olefin group and a moisture curable group, such as an isocyanate or silane group. After the precursor is applied, the composite sheet is exposed to both beam radiation and moisture, which respectively promote polymerization and curing at different sites of the precursor. The function of the cured polymeric layer includes protecting the metal layer from corrosion. The amenability of the isocyanate or silane functionality to moisture-promoted coupling promotes substantially full conversion and curing of the precursor, even of portions of the substrate that are geometrically shadowed from incident beam radiation.