Abstract:
A process for preparing polymer particles, consisting of a latex polymer dispersion including particles of liquid dispersible starting polymer in a dispersion liquid and growing a polymer shell on the particles via a starve fed free radical polymerization process.
Abstract:
This invention relates to methods of making graft copolymers, and articles having such graft copolymers. The methods may provide better control than in radicalization or photoinitiated polymerization techniques. For example, a graft copolymer can be prepared by reacting an alkoxide ion with a polymer. The alkoxide, in turn, can be provided by any suitable technique, for example, by reacting an alcohol with a base. In some embodiments of the invention, the graft copolymers may be a normally hydrophobic polymer, such as a polysulfone, that has been made more hydrophilic due to the attachment of hydrophilic side groups such as polyethylene glycol or polypropylene glycol. The copolymers of the invention have many uses, for example, in films or porous membranes.
Abstract:
The present invention relates to a method for manufacturing an electro-conductive pattern material which is characterized in that the method includes a step for bonding a graft polymer having a functional group which can interact with electro-conductive particles and a cross-linking functional group directly onto a substrate in a pattern form, a step for forming an electro-conductive particle-adsorbing layer by adsorbing electro-conductive particles to the functional group capable of interacting with the electro-conductive particles of the graft polymer, and a step for forming a cross-linking structure in the electro-conductive particle-adsorbing layer, by applying energy the electro-conductive particle-adsorbing layer. In accordance with this method, it is possible to manufacture an electro-conductive pattern material having a high resolving power without breakage of wiring and an electro-conductive pattern having high durability. When a functional group which can interact with an electroless plating catalyst or the like is introduced therein as a substitute for the functional group which can interact with electro-conductive particles, and then an electroless plating catalyst or the like are adsorbed thereby followed by subjecting to electroless plating step, it is also possible to obtain an electro-conductive pattern material.
Abstract:
Crosslinked lactam polymers are disclosed. Specifically, lactam polymers having pendant acrylate groups are crosslinked via a Michael addition type acrylate reactant. The crosslinked lactam polymers are useful in medical and pharmaceutical applications.
Abstract:
Hyaluronic acid-retaining biopolymer is provided which exhibits low levels of protein adsorption and surface friction. The biopolymer is useful for incorporation in products, such as contact lenses, used in biological environments.
Abstract:
A PBI compound includes imidazole nitrogens at least a portion of which are substituted with a moiety containing a carbonyl group, the substituted imidazole nitrogens being bonded to carbon of the carbonyl group. At least 85% of the nitrogens may be substituted. The carbonyl-containing moiety may include RCO—, where R is alkoxy or haloalkyl. The PBI compound may exhibit a first temperature marking an onset of weight loss corresponding to reversion of the substituted PBI that is less than a second temperature marking an onset of decomposition of an otherwise identical PBI compound without the substituted moiety. The PBI compound may be included in separatory media. A substituted PBI synthesis method may include providing a parent PBI in a less than 5 wt % solvent solution. Substituting may use more than 5 equivalents in relation to the imidazole nitrogens to be substituted.
Abstract:
This invention is directed to graft materials for implanting, transplanting, replacing, or repairing a part of a patient and to methods of making the graft materials. The present invention is also directed to stent grafts and endoluminal prostheses formed of the graft materials. More specifically, the present invention is a graft material which includes porous polymeric sheet, extracellular matrix material (ECM) disposed on at least a portion of the porous polymeric sheet and at least one polymer layer disposed on at least a portion of the ECM. The ECM may be in a gel form. The polymeric sheet and the polymer layer may be made from foam material and may comprise a polyurethane urea and a surface modifying agent such as siloxane.
Abstract:
A method of using metallized and nonmetallized nanostructured chemicals as surface and volume modification agents within polymers and on the surfaces of nano and macroscopic particulates and fillers. Because of their 0.5 nm-3.0 nm size, nanostructured chemicals can be utilized to greatly increase surface area, improve compatibility, and promote lubricity between surfaces at a length scale not previously attainable.
Abstract:
The invention relates to silicone-containing graft copolymers and to processes for their preparation. In particular, the invention relates to silicone-containing graft copolymers which are obtained by the controlled grafting of olefinic monomers onto a partly styrene oxide-based silicone polyether.
Abstract:
The present invention provides a separating material producable by a) providing a solid substrate, having amino-functional groups coupled to the substrate surface, b) covalently coupling of the amino-functional groups with a thermally labile radical initiator, c) contacting the substrate surface with a solution of polymerizable monomers under conditions, where thermally initiated graft copolymerization of the monomers takes place, to form a structure of adjacent functional polymer chains on the surface of the substrate. The present invention further provides a method for the production of a separating material by a) providing a solid substrate, having aminofunctional groups coupled to the substrate surface, b) covalently coupling of the aminofunctional groups with a thermally labile radical initiator, c) contacting the substrate surface with a solution of polymerizable monomers under conditions, where thermally initiated graft copolymerization of the monomers takes place, to form a structure of adjacent functional polymer chains on the surface of the substrate.