623 results about "Polymer nanoparticle" patented technology

The present invention relates to a conjugate that includes a nucleic acid ligand bound to a controlled release polymer system, a pharmaceutical composition that contains the conjugate, and methods of treatment using the conjugate. The controlled release polymer system includes an agent such as a therapeutic, diagnostic, prognostic, or prophylactic agent. The nucleic acid ligand that is bound to the controlled release polymer system, binds selectively to a target, such as a cell surface antigen, and thereby delivers the controlled release polymer system to the target.

A polymer nanoparticle is provided. The nanoparticle includes an inner layer having alkenylbenzene monomer units. The nanoparticle further includes an outer layer having monomer units selected from conjugated dienes, alkylenes, alkenylbenzenes, and mixtures thereof. The nanoparticle has at least one functional group associated with the outer layer. The nanoparticle further has at least one metal complexed with said functional group. The nanoparticles can be used as a templates for preparation of nano-sized metal crystals and polymer-metal nanocomposite.

The present invention provides polymer nanoparticles with a controlled architecture of nano-necklace, nano-cylinder, nano-ellipsoid, or nano-sphere. The polymer nanoparticle comprises a core polymerized from multiple-vinyl-substituted aromatic hydrocarbons, a shell polymerized from alkyl-substituted styrene, and a polystyrene layer between the core and the shell. The present invention also provides a method of preparing the polymer nanoparticles and a rubber article such as a tire manufactured from a formulation comprising the polymer nanoparticles.

The present invention relates to polymeric nanoparticles, particularly useful in drug and agent delivery, as well as for imaging and diagnosis. The polymeric nanoparticles of the present invention comprise cross-linkers that, when degraded, leave simple linear polymeric molecules that can be excreted by the body. The present invention also relates to methods of producing the polymeric nanoparticles of the present invention, and methods of using them in drug and agent delivery, as well as imaging and diagnosis.

A polymeric nanoparticle composition is provided. The nanoparticle may be of a core / shell configuration with an interphase region connecting the core and the shell. The mean average diameter of the polymer nanoparticles may be less than about 250 nm. The size, composition, and / or configuration of the interphase region may be varied to achieve desired physical and / or chemical properties of the resulting polymeric nanoparticles, and of the compositions into which the nanoparticles are compounded.

The present invention provides a rubber composition comprising (a) a liquid polymer, (b) polymer nanoparticles, and (c) a rubbery matrix. The composition may comprise less or even no aromatic oil. Rubber articles manufactured from such composition, such as tires and power belts, have gained improved reinforcement and controllable hysteresis properties.

This invention discloses a process for synthesizing a hairy polymer particle which comprises the steps of (1) polymerizing a vinyl aromatic monomer by emulsion polymerization in an aqueous medium to produce core particles, (2) recovering the core particles from the aqueous medium, (3) dispersing the core particles in an organic solvent, (4) adding an organo-lithium compound to the dried core particles in the organic solvent to produce the hairless core initiator, and (5) utilizing the hairless core initiator to initiate the anionic polymerization of a conjugated diolefin monomer in an organic solvent to produce a solution of the hairy polymer particles. The hairy polymer nanoparticles can then be recovered from the organic solvent. These hairy polymer particles are comprised of (1) a core which is comprised of a polymer of a vinyl aromatic monomer and (2) hairs which are polymer chains of a conjugated diolefin monomer, wherein the hairs are covalently bonded to the core. The core is typically spherical in shape, has a diameter of less than 1000 nm, and is comprised of a crosslinked polymer of a vinyl aromatic monomer. The hairy polymer particles of this invention are useful as fillers in rubber compositions used in making articles of manufacture, such as tires, hoses, power transmission belts, windshield wiper blades, and the like.

The present invention describes polymer nanoparticles with a cationic surface potential, in which both hydrophobic and hydrophilic pharmaceutically active substances can be encapsulated. The hydrophilic and thus water-soluble substances are encapsulated in the particle core by co-precipitation through ionic complexing with a charged polymer. Both therapeutic agents and diagnostic agents can be used as pharmaceutically active substances for encapsulation. The cationic particle surface permits stable, electrostatic surface modification with partially oppositely charged compounds, which can contain target-specific ligands for improving passive and active targeting.

Provided is a polymer nanoparticle comprising a core and a vulcanizable shell, wherein the core has a glass transition temperature (Tg) of at least about 150° C. Also provided is a method of preparing polymer nanoparticles with a core and a vulcanizable shell, comprising (a) in a liquid hydrocarbon medium, polymerizing conjugated diene monomers to produce a poly(conjugated diene) block and (b) copolymerizing the poly(conjugated diene) block with a mixture of mono-vinyl aromatic monomers and multiple-vinyl aromatic monomers to produce an aromatic block, wherein the core has a Tg of at least about 150° C. Also provided is a composition comprising (a) a rubber matrix; and (b) a polymer nanoparticle including a core and a vulcanizable shell; wherein the Tg of the core is at least about 150° C.

Provided is a composition comprising a rubber and a polymer nano-particle comprising a poly(mono-vinyl aromatic) core and a poly(mono-vinyl aromatic-conjugated diene) surface layer, wherein the core of the polymeric nano-particle has a glass transition temperature (Tg) of between about 150° C. and about 600° C. Also provided is a composition comprising at least two (mono-vinyl aromatic-conjugated diene) copolymer rubbers and a polymeric nano-particle comprising a poly(mono-vinyl aromatic) core and a poly(mono-vinyl aromatic-conjugated diene) surface layer; wherein the core of the polymeric nano-particle has a glass transition temperature (Tg) of between about 150° C. and about 600° C., and the poly(mono-vinyl aromatic-conjugated diene) surface layer of the polymeric nano-particle comprises a mono-vinyl aromatic content that is between about 50 percent and about 150 percent that of the mono-vinyl content of one of the (mono-vinyl aromatic-conjugated diene) copolymer rubbers.

The invention discloses a preparation method of a stable superhydrophobic hot liquid coating, and belongs to the technical field of surface coating preparation. According to the preparation method, in an acetone-water mixed system, in the catalytic effect of acid or base, organic silane and nano particles carry out hydrolysis and condensation reactions to obtain organic silane polymer / nano particle compound suspension; then organic resin adhesive is added into the compound suspension, the mixture is evenly mixed and evenly sprayed on the surface of a substrate material, and finally a thermal curing treatment is performed to obtain the stable superhydrophobic hot liquid coating. The prepared coating has an excellent superhydrophobic hot liquid performance, has the advantages of good mechanical stability, chemical stability, and environmental stability, and thus has a good application prospect.

The present invention provides polymeric nanoparticles comprising triblock and optionally diblock copolymer chains. The architecture of the polymeric nanoparticles may be controlled, resulting in nanoparticles having non-spherical shapes. The present invention also provides a method of preparing the polymeric nanoparticles and a rubber article such as a tire manufactured from a formulation comprising the polymer nanoparticles.

The invention is directed to biocompatible conjugated polymer nanoparticles including a copolymer backbone, a plurality of sidechains covalently linked to said backbone, and a plurality of platinum compounds dissociably linked to said backbone. The invention is also directed to dicarbonyl-lipid compounds wherein a platinum compound is dissociably linked to the dicarbonyl compound. The invention is also directed to methods of treating cancer or metastasis. The methods includes selecting a subject in need of treatment for cancer or metastasis and administering to the subject an effective amount of any of the nanoparticles, compounds, or compositions of the invention.

The invention provides nanoparticles consisting of a polymer which is a metal chelating agent coated with a magnetic metal oxide, wherein at least one active agent is covalently bound to the polymer, said nanoparticles may optionally further comprise at least one active agent physically or covalently bound to the outer surface of the magnetic metal oxide. Pharmaceutical compositions comprising these nanoparticles may be used, inter alia, for detection and treatment of tumors and inflammations.

The invention discloses a tumor-targeted nanometer drug delivery system for cooperative chemotherapy and photodynamic therapy and a preparation method thereof. The drug delivery system is prepared from carboxymethyl chitosan, folate, a photosensitizer chlorine e6 and adriamycin, wherein the chlorine e6 and the folate are coupled to a carboxymethyl chitosan chain segment through an amido bond, and are loaded to polymer nanoparticles of the adriamycin through an ion exchange method. The nanometer material prepared by the method is high in yield, regular in shape and even in distribution. In-vivo and in-vitro experiments prove that the tumor targeting property of the nanometer preparation can be significantly improved by folate receptor mediation; enrichment on the tumor part is achieved and drug release is controlled. The photosensitizer is capable of effectively reversing the chemotherapy drug resistance and significantly inhibiting the growth of tumors after being irradiated by near-infrared light. Therefore, the related nanometer drug delivery system has good application prospect in the aspect of breast cancer treatment.

The invention belongs to the field of polymer / nanoparticle composite materials, and relates to an infrared thermal reflection and anti-ultraviolet polyvinyl butyral (PVB) transparent film for laminated safety glass and a preparation method thereof. According to the method, nano-indium stannum oxide (ATO) is selected as functional particles, is subjected to double processing through a coupling agent and a dispersing agent and is poured into a mold to be formed and compounded after being directly and uniformly mixed with purchased or self-made polyvinyl butyral, plasticizer, antioxidant and filming agent by means of ultrasonic wave to prepare a heat-insulating PVB nano composite film. The nano-ATO particles are subjected to the double processing and the special ultrasonic dispersion process, so that the problem of agglomeration of the ATO is effectively improved; and the prepared PVB nano composite film has superior mechanical property and higher infrared reflectivity and visible light transmittance, and can be directly used for processing and producing heat-insulating, sound-insulating, anti-ultraviolet, transparent and impact-resistant multi-functional safety glass.

Disclosed is a novel polymeric nanoparticle adhesive composite including a nanoparticle filler and method for the production thereof. More particularly, the disclosure describes the use of nanoparticle fillers, including a novel halloysite nanoparticle filler which utilizes generally cylindrical or tubular nanoparticles (e.g. rolled scroll-like shape). The filler is effectively employed in a polymer nanoparticle adhesive composite, containing the halloysite nanoparticle or other equivalent naturally occurring nanotubular filler, in which the advantages of the nanoparticle filler are provided (e.g., reinforcement, flame retardant, etc.) while maintaining or improving mechanical performance of the adhesive composite (e.g., adhesive strength and tack)

The present invention relates to polymeric nanoparticles useful in drug and agent delivery, as well as for imaging, diagnosis and targeting. The polymeric nanoparticles of the present invention comprise polymers and cross-linkers that, when degraded, leave simple nontoxic biocompatible molecules that can be metabolized, excreted, or absorbed by the body. The present invention also relates to processes for producing the polymeric nanoparticles of the present invention, and methods of using them in drug and agent delivery, as well as imaging, diagnosis and targeting.

Provided herein are systems, methods, and compositions for polymer nanoparticles and polymer magnetic nanoparticles. More particularly, the polymer nanoparticles and polymer magnetic nanoparticles are temperature sensitive and responsive to a first temperature.

There are provided internally cross-linked, stable polymeric materials, in the form of substantially spherical particles, each particle consisting essentially of a single macromolecule. They have the unusual property of being soluble or dispersible in a liquid medium without significantly increasing the viscosity of the medium, rendering them potentially useful in imaging applications such as ink jet printers. They can be prepared by dissolving polymeric material in a solvent system to form a solution of the polymeric material at a concentration therein of less than the critical concentration for the polymer, causing the polymeric material to contract into an approximately spheroidal conformation in solution, cross-linking the polymeric material in solution in said spheroidal conformation so assumed, and recovering stable, cross-linked approximately spheroidal polymeric particles from the solution.

The invention relates to a self-assembly method of inorganic nano particle hybridization organic membrane. The method comprises steps of: respectively dissolving polycation and polyanion in a dissolvent, preparing to form a membrane casting solution, standing and defoaming; adding inorganic nano particle into a polyanion solution to prepare a polymer nano particle solution; soaking or dynamically filtering polyanion nano particle solution or polycation solution on the surface of a substrate or basal membrane for 10 to 60 minutes to form a thin membrane layer. The substrate or the basal membrane is soaked or dynamically filtered in the polycation solution or polyanion nano particle solution for 10 to 60 minutes; the polyanion nano particle solution reacts with the polycation to form the thin membrane layer; the substrate or the basal membrane is soaked in deionized water, and the membrane surface is rinsed and dried. When the polycation or the polyanion nano particle solution is filtered on the basal membrane, the transmembrane differential pressure thereof is 0.01 to 0.3MPa or minus 0.02 to minus 0.09MPa. The membrane forming method is simple; the thin membrane prepared on the substrate is compact and uniform; the membrane formed on the basal membrane has excellent penetration and vaporization separating property and mechanical strength.

The invention "colloidal nanoscale carriers for active hydrophilic substances and method for producing same" pertains to the field of medical, odontological or hygiene preparations, and is characterized by structures formed by hydrophilic polymers that contain active hydrophilic substances coated with a non-hydrophilic phase and surfactants with affinity for the components, forming an invert emulsion that allows the incorporation and controlled delivery of active hydrophilic substances, conferring properties such as protection against degradation processes, improvement of compatibility with the other components of the formulation in the final product, increase in the availability and / or bioavailability of the active substance in the medium of interest (including improvements in permeation processes in biological materials, reduction of the exposure and volatilization of the active substance in the medium) and controlled release of the active substance(s). The nanoscale carrier obtained by this method, called colloidal nanoscale carrier (NC), can be used in various fields, such as the pharmaceutical field (including dermatology), cosmetics, personal hygiene products, veterinary medicine, agrochemicals and fertilizers, the food industry and the like. The invention proposes a kinetically stable system with an effective nanoscale structure that consists of nanoscale carriers formed by polymers emulsified in a non-aqueous medium in the presence of a surfactant with affinity for the two phases (the dispersion medium and the encapsulating agent). This system is obtained by nanoemulsification of an aqueous phase of hydrophilic polymers emulsified in a non-hydrophilic (lipophilic or silophilic) phase that contains the surfactants, and is characterized by the implementation of two concepts that encompass the generation of an invert nanoscale emulsion and of polymer nanoparticles. The formulation has the novel technical effect of providing a polymer excipient with a nanoscale structure for delivering hydrophilic molecules suspended in a non-hydrophilic phase, which allows controlling the size of the nanoscale particles and modulating colloidal stability by means of process parameters.

The invention relates generally to the treatment and prevention of human cancer and viral diseases. More specifically, this invention relates to development of a new generation of vaccines that rely on eliciting cellular immune responses, specifically induction of cytotoxic T lymphocytes (CTL), against cancer cells and virus-infected cells via administration of a polymeric nanoparticle containing a vaccine comprising a fusion peptide or a modified peptide. Such a fusion peptide is composed of an insertion signal sequence and a peptide derived from a tumor antigen or a viral antigen, which improves antigen presentation and induces CTL with higher efficiency against cancer cells and virus-infected cells. An exemplary peptide utilized in the invention is Mart-1:27-35 peptide.

A composition for forming a low dielectric thin film, which includes a silane polymer, polymer nanoparticles, a porogen and an organic solvent, and a method of preparing a low dielectric thin film using the same. The low dielectric thin film prepared using the composition of this disclosure has a low dielectric constant and excellent mechanical strength. As well, the polymer nanoparticles in the low dielectric thin film have a uniform diameter and are soft, and thus are advantageously applied to a chemical-mechanical polishing process.

Compositions and methods are included for preparing a hairy polymeric nanoparticle including first and second shell block polymer arms are at least partially phase-separated and surround a polymeric core. One type of polymeric arm can have a greater polarity than the other type(s) of polymeric arms. A rubber composition including the hairy nanoparticles is also provided.