11561results about How to "Improve hydrophilicity" patented technology

Substrates, coated with a block copolymer comprising at least four blocks being at least two hard blocks, one soft block and one hydrophilic block, wherein a the soft block is sandwiched between the hard blocks.

The invention generally relates to compositions and methods for transporting substances across mucosal barriers. The invention also relates to methods of making and using such substances.

The present invention provides a medical device, preferably an ophthalmic device, more preferably a contact lens, which comprises a core material and a biocompatible LbL coating non-covalently attached to said core material. The biocompatible LbL coating comprises at least one charge/non-charge bilayer, wherein said charge/non-charge bilayer is composed of, in no particular order, one layer of a charged polymeric material and one layer of a non-charged polymeric material which is capable of being non-covalently bond to the charged polymeric material.

PCT No. PCT/EP96/04377 Sec. 371 Date May 11, 1998 Sec. 102(e) Date May 11, 1998 PCT Filed Oct. 8, 1996 PCT Pub. No. WO97/13810 PCT Pub. Date Apr. 17, 1997The present invention is directed to fluorescent dyes and its valence tautomers of the formula wherein Q represents a conjugated moiety that increases the fluorescent quantum yield of the compound; R1 is a functionalized group of the formula-(CH2)jY, wherein Y is selected from the group consisting of SO3H, COOH, NH2, CHO, NCS, epoxy, phthalimido, and COOZ, wherein Z represents a leaving group; R2 is a functionalized group of the formula -(CH2)kY', wherein Y' is selected from the group consisting of SO3H, COOH, NH2, CHO, NCS, epoxy, phthalimido, and COOZ, wherein Z represents a leaving group; M+ is a counterion selected from the group consisting of ammonium, alkali metal cations, and alkaline earth metal cations; n=1 to 4; m=1 to 4; j=2 to 10; and k=2 to 10.

An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder has a hexagonal ferrite structure, the magnetic layer comprises a coefficient of friction-lowering component in the form of nonmagnetic inorganic particles, and a compound in which a substituent selected from the group consisting of a hydroxyl group and a carboxyl group is directly substituted on an aromatic ring.

The present invention relates to amphiphilic drug-oligomer conjugates capable of traversing the blood-brain barrier ("BBB") and to methods of making and using such conjugates. An amphiphilic drug-oligomer conjugates comprise a therapeutic compound conjugated to an oligomer, wherein the oligomer comprises a lipophilic moiety coupled to a hydrophilic moiety. The conjugates of the invention further comprise therapeutic agents such as proteins, peptides, nucleosides, nucleotides, antiviral agents, antineoplastic agents, antibiotics, etc., and prodrugs, precursors, derivatives and intermediates thereof, chemically coupled to amphiphilic oligomers.

The present invention provides an optically clear, hydrophilic coating upon the surface of a silicone medical device by sequentially subjecting the surface of the lens to plasma polymerization in a hydrocarbon-containing atmosphere and then covalently attaching a preformed hydrophilic polymer to the surface of the carbon coating. The invention is especially useful for forming a biocompatible coating on a silicone contact lens.

Micronized perlite filler product, methods of producing the micronized expanded perlite products, and methods of use thereof are provided. The micronized expanded perlite product has, for example, a small median particle size (for example, less than 11 microns), a high blue light brightness (for example, higher than 84) and low oil absorption (for example, less than 70 percent in volume). The micronized expanded perlite product may be used in a variety of applications such as anti-block filler in plastic films and reinforcement filler in polymers.

Provided is a radiation-sensitive colored composition that enables formation of color cured films in which color concentration unevenness is inhibited and which have uniform color and exhibit a superior development property and excellent pattern formability in the formation of color patterns.

The radiation-sensitive colored composition contains (A) a dye polymer containing a structural unit having a dye structure polymerized using a chain-transfer agent having a LogP value of 5 or less, and (B) a solvent.

The present invention provides a composite nanofiber construct comprising: at least a first nanofiber comprising at least a polymer and at least a calcium salt nanoparticle, wherein the ratio of polymer to calcium salt nanoparticle is between the range of 99:1 and 10:90 weight percent; and at least a second nanofiber comprising at least a polymer and at least a calcium salt nanoparticle, wherein the ratio of polymer to calcium salt nanoparticle is between the range of 100:0 and 70:30 weight percent. The present invention also provides a method of preparing the composite nanofiber construct.

A catalyst support for a fuel cell, having good hydrophilic property and electroconductivity, an anode including the same, and a fuel cell including the anode are provided. The catalyst support is composed of a metal oxide-carbon composite.

The present invention is directed toward the renewable surface treatment of medical devices such as contact lenses and medical implants. In particular, the present invention is directed to a method of modifying the surface of a medical device to increase its biocompatibility or hydrophilicity by coating the device with a removable hydrophilic polymer by means of reaction between reactive functionalities on the hydrophilic polymer which functionalities are complementary to reactive functionalities on or near the surface of the medical device. The present invention is also directed to a contact lens or other medical device having such a surface coating.

The present invention relates to microparticles comprising a gel body, wherein the gel body comprises a synthetic polymer and a drug, wherein the microparticles have an average diameter in the range 40 to 1500 μm, wherein the polymer is cross-linked by groups comprising disulfide linkages and is in the form of a hydrogel.

The invention relates to a layer-by-layer self-assembling oxidized graphene nano-filtration membrane and a preparation method of the layer-by-layer self-assembling oxidized graphene nano-filtration membrane, which belongs to the technical field of the preparation of a nano-filtration membrane. The layer-by-layer self-assembling oxidized graphene nano-filtration membrane comprises a supporting layer and a functional layer, wherein the functional layer is in a layered structure which is different from the compact structure of the traditional nano-filtration membrane functional layer. The preparation method comprises the following steps of (I) preparing an oxidized graphene solution through a hummers method; and (II) preparing an oxidized graphne nano-filtration membrane through a layer-by-layer self-assembling method. The oxidized graphene nano-filtration membrane is prepared through the layer-by-layer self-assembling method, a water passage is formed between the oxidized graphene lamellas, the distance of the oxidized graphene layer has a good interception effect for ions, the hydrophilia can be improved through the oxygen-containing functional groups on the surface of the oxidized graphene layer, so that the membrane is good in permeability and interception property. By utilizing the layer-by-layer self-assembling method, the high requirement of the traditional nano-filtration membrane preparation process on the condition can be avoided, the process is simple, the condition is easily controlled, and the application prospect is wide.

Disclosed herein is a transfer ink jet recording apparatus equipped with a substrate; an intermediate transfer member that is arranged on the substrate and has a surface containing at least one material of fluorine-containing rubber and silicone rubber, said surface being subjected to a modification treatment by a plasma treatment and an application treatment with a compound represented by the general formula (1) defined in the specification; an application unit for applying a component that causes ink viscosity increase to the modification-treatment-subjected surface of the intermediate transfer member; an ink jet recording unit for ejecting an ink on the intermediate transfer member to which the component has been applied to form an intermediate image; and a transfer unit for transferring the intermediate image formed on the intermediate transfer member to a recording medium.