32405 results about "Copolymer" patented technology

The invention relates to sutures and surgical staples useful in anastomoses. Various aspects of the invention include wound closure devices that use amphiphilic copolymer or parylene coatings to control the release rate of an agent, such as a drug or a biological material, polymerizing a solution containing monomers and the agent to form a coating, using multiple cycles of swelling a polymer with a solvent-agent solution to increase loading, microparticles carrying the agent, biodegradable surgical articles with amphiphilic copolymer coatings, and sutures or surgical staples the deliver a drug selected from the group consisting of triazolopyrimidine, paclitaxol, sirolimus, derivatives thereof, and analogs thereof to a wound site.

The image stability of electrophoretic media, comprising a plurality of particles disposed in a fluid and capable of moving through the fluid upon application of an electric field to the medium, can be improved by including in the fluid either a polystyrene or an aggregating diblock copolymer which forms micelle-like structures in the fluid, the diblock copolymer having a first block soluble in the fluid and a second block not swellable by the fluid. In variable transmission electrophoretic media, haze can be reduced by using as the fluid a mixture of a partially hydrogenated aromatic hydrocarbon and a terpene.

A composition for personal, home, or laundry treatment comprising a polymer made up of one or more crosslinked rake or comb silicone copolymer segments. A process for making copolymers for use in such compositions involves hydrosilylation in the presence of a catalyst.

Photoresist monomers, polymers thereof, photoresist compositions containing the same for preventing acid generated in the exposed area during the course of a photolithography process from being diffused to the unexposed area. The line edge roughness and slope pattern are improved when an ultrafine photoresist pattern is formed using photoresist copolymer having a multi-oxygen-containing compound as a repeating unit such as an ethyleneoxy moiety represented by Formula 1 with at least one polymerizable carbon-carbon double bond. In addition, the shape of pattern is improved by eliminating top loss and the adhesion of pattern to the substrate is improved. wherein n is an integer ranging from 1 to 5.

The present invention relates to novel bioabsorbable polymeric compositions based upon AB polyester polyether or related diblocks and triblocks. Compositions according to the present invention may be used in medical applications, for example, for reducing or preventing adhesion formation subsequent to medical procedures such as surgery, for producing surgical articles including stents and grafts, as coatings, sealants, lubricants, as transient barriers in the body, for materials which control the release of bioactive agents in the body, for wound and bum dressings and producing biodegradable articles, among numerous others.

This invention relates to wettable biomedical devices comprising amphiphilic block copolymers. The amphiphilic block copolymers are useful as internal wetting agents for biomedical applications, such as implantable devices, ophthalmic devices and in one embodiment, contact lenses.

A fiber is obtainable from or comprises a propylene / α-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams / cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481-1629 (d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics can be made from such fibers.

The present invention generally relates to reducing the mucoadhesive properties of a particle. In some embodiments, the particle is coated with and / or associated with a (poly(ethylene glycol))-(poly(propylene oxide))-(poly(ethylene glycol)) triblock copolymer. Methods for preparing inventive particles using a poly(ethylene glycol)-vitamin E conjugate as a surfactant are also provided. In some embodiments, methods are provided comprising administering to a subject a composition of particles of the present invention. Such particles with reduced mucoadhesive properties are useful in delivering agents to mucosal tissues such as oral, ophthalmic, gastrointestinal, nasal, respiratory, and genital mucosal tissues.

Improved aerodynamically light particles for drug delivery to the pulmonary system, and methods for their synthesis and administration are provided. In a preferred embodiment, the aerodynamically light particles are made of a biodegradable material and have a tap density less than 0.4 g / cm3 and a mass mean diameter between 5 mum and 30 mum. The particles may be formed of biodegradable materials such as biodegradable polymers. For example, the particles may be formed of a functionalized polyester graft copolymer consisting of a linear alpha-hydroxy-acid polyester backbone having at least one amino acid group incorporated therein and at least one poly(amino acid) side chain extending from an amino acid group in the polyester backbone. In one embodiment, aerodynamically light particles having a large mean diameter, for example greater than 5 mum, can be used for enhanced delivery of a therapeutic agent to the alveolar region of the lung. The aerodynamically light particles incorporating a therapeutic agent may be effectively aerosolized for administration to the respiratory tract to permit systemic or local delivery of wide variety of therapeutic agents.

The invention provides a pharmaceutical agent delivery composition comprising: (i) a transport polymer comprising a linear or branched peptide having from about 10 to about 300 amino acid residues, having from about 5 to 100% histidine residues, and optionally having from 0 to about 95% non-histidine amino acid residues; (ii) at least one pharmaceutical agent; and optionally (iii) one or more intracellular delivery components in association with the transport polymer. The invention also provides methods for using such composition to deliver the pharmaceutical agent to the interior of cells.

The invention provides a branched transport polymer characterized as having at least 10 amino acids and a ratio of histidine to non-histidine amino acids greater than 1.5, said branched transport polymer comprising one or more backbones, one or more terminal branches, and optionally, one or more non-terminal branches. The branched transport polymer may be associated with a pharmaceutical agent to form a pharmaceutical agent delivery composition useful for in vivo therapies based on local injection.

Disclosed are copolymers of carbon nanotubes, as well as processes and applications of carbon nanotube dispersions. Carbon nanotube emulsions and related technology are also disclosed. The controlled deposition of carbon nanotubes on substrates is also provided. Methods of purifying single-walled carbon nanotubes are also provided. Devices made according to the disclosed methods are further described herein.