Abstract:
Methods of controlling the reaction rate of a polyurea coating composition are described comprising a) providing a polyurea coating composition comprising a first part comprising at least one polyisocyanate; and a second part comprising at least one polyamine; and b) combining the first part and the second part to form a liquid mixture; wherein the first part, second part, or liquid mixture further comprises 0.5 wt.-% to 5 wt.- % water scavenger; and 0.05 to 10 wt.-% of a hydroxyl component comprising one or more reactive hydroxyl groups. In one embodiment, the method is utilized for forming a coating on a surface of a pipeline is described by applying the liquid mixture to internal surfaces of the pipeline and allowing the mixture to set forming a cured coating. Polyurea coating compositions are also described.
Abstract:
The present invention discloses methods for producing a stable hydrophilic, optically clear, and biocompatible coating for hydrophobic substrates such as silicone elastomer using glow discharge plasma grafting of poly(ethylene glycol) (PEG) compounds. The PEG molecules are ionized in a glow discharge plasma driven by an electric field and covalently attach to the substrate surfaces. Advantageously, such methods produce a stable hydrophilic, optically clear, and biocompatible surface.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer Mehrschichtlackierung auf einem Kunststoffsubstrat bei dem eine Basislackschicht oder mehrere direkt aufeinander folgende Basislackschichten auf einem Kunststoffsubstrat hergestellt werden, direkt auf der einen oder der obersten der mehreren Basislackschichten eine Klarlackschicht hergestellt wird und anschließend die eine oder die mehreren Basislackschichten und die Klarlackschicht gemeinsam gehärtet werden und welches dadurch gekennzeichnet ist, dass mindestens ein zur Herstellung der Basislackschichten eingesetzter Basislack mindestens eine wässrige Polyurethan- Polyharnstoff-Dispersion (PD) enthaltend Polyurethan-Polyharnstoff-Partikel umfasst, wobei die in der Dispersion (PD) enthaltenen Polyurethan-Polyharnstoff-Partikel anionische und/oder in anionische Gruppen überführbare Gruppen enthalten und eine mittlere Teilchengröße von 40 bis 2000 nm sowie einem Gelanteil von mindestens 50 % aufweisen.
Abstract:
A method and apparatus for applying a bone attachment coating to a prosthetic component, the bone attachment coating being formed from a plurality of particles applied to a surface of the prosthetic component. The method comprising: locally exciting the particles so as to increase the kinetic and/or thermal energy of the particles; and applying pressure to the particles by virtue of a press arranged so as to press the particles against the surface of the prosthetic component at an interface between the press and the prosthetic component. The kinetic and/or thermal energy of the particles causes localised heating of the component such that the particles may be embedded into the surface of the prosthetic component.
Abstract:
The present invention relates to surface modification of materials. In particular the invention relates to a process for surface modification of polymeric materials to make the surface non-stick in order to reduce the ability of materials to stick on it and thus provide an easy flow. The process comprises embossing the surface of an object with a pattern comprising micropillars having different shapes (circle, square, rectangular, polygonal prismatic) with an equivalent circular diameter, height and pitch in the range 10-200 microns; applying a layer of adhesive to get a coverage of 0.1 to 5 mg/cm on the embossed surface either by spray coating or dip coating; depositing 0.2 to 1.2 mg/cm of hydrophobic particles wherein the hydrophobic particles have a particle size in the range 0.1 to 10 microns.
Abstract:
Methods, systems, and kits provide robust and biologically active coatings for implanted medical devices. The methods are based on electrostatic attraction between a non-conductive material surface on the medical device and a coating material including a charged biopolymer or pharmaceutical agent. Surface charge is induced or enhanced in the non-conductive material using a physical method. The methods are applicable to a wide variety of non-conductive substrate materials and coatings containing any of a wide variety of biological molecules and pharmaceutical agents.
Abstract:
The disclosed technology relates to methods, apparatuses and systems for detecting molecules using surface plasmon resonance techniques, and more particularly to surface plasmon resonance techniques that employ metal nanoparticles formed on substrates. In one aspect, method of making a layer of metallic nanoparticles includes providing a liquid composition comprising a binder polymer and a solvent and at least partially immersing, into the liquid composition, an article comprising a polymeric surface, wherein the polymeric surface comprises a polymeric material and does not comprise an inorganic glass or crystalline material. The method additionally includes applying a gas phase plasma to the liquid composition to facilitate chemical reactions between the binder polymer and the polymeric material of the polymeric surface to form a binder layer on the polymeric surface of the article. The method further includes applying metallic nanoparticles onto the binder layer to form a metallic nanoparticle layer on the binder layer.
Abstract:
A method is provided for forming an impermeable barrier layer on an inner tire surface of a tire. An assembly is also provided along with a kit for forming an impermeable barrier layer on an inner tire surface of a tire accordingly.