186 results about "Polymer" patented technology

A film having filling capability is deposited by forming a viscous polymer in a gas phase by striking an Ar, He, or N2 plasma in a chamber filled with a volatile hydrocarbon precursor that can be polymerized within certain parameter ranges which define mainly partial pressure of precursor during a plasma strike, and wafer temperature.

The present invention provides a gastric retention controlled drug delivery system comprising: (a) a controlled release core comprising a drug, a highly swellable polymer and a gas generating agent, said core being capable of swelling and achieving floatation rapidly while maintaining its physical integrity in gastrointestinal fluids for prolonged periods, and (b) a rapidly releasing coat composition comprising the same drug as in the core and pharmaceutically acceptable excipients, wherein the coating composition surrounds the core such that the system provides a biphasic release of the drug in gastrointestinal fluids.

A curable composition for use in wound care comprising, apportioned between at least one Part A and at least one Part B: one or more alkenyl-group containing polymers (i) having at least one alkenyl group or moiety per molecule, one or more SiH-containing polymers (ii) having at least one Si—H unit per molecule; and a catalyst (iii) for curing by addition of alkenyl-containing polymer (i) to SiH-containing polymer (ii), Part A and Part B independently having viscosity at 23° C. in the range 5-300 Pa·s, preferably 10-100 Pa s, at a shearing rate of 10 s−1, and when combined in one Part having cure time at 23° C. in the range from 0.5 min to 25 min, wherein when dispensed into a location about a wound dressing, said wound dressing overlying a wound site and skin thereabout, said dispensing being so as to intimately contact and overlie an edge of said dressing and skin about said edge, the composition cures in contact with said edge and skin at 32° C. to an elastomer exhibiting zero or low tack at a time in the range from 0.5 to less than 30 minutes, apparatus for use with said composition comprising dispensing apparatus or wound dressing, a kit comprising the same, and methods of dispensing and curing the same and of using the same in sealing a wound dressing and in treating a wound site of a human in need thereof.

A process for the selective and controlled reduction of permeability to water in oil-bearing formations made up of sandstone or limestone, the process comprising the injection of a slug of polymer aqueous solutions having a polarity opposite to the polarity of the rock, followed by the injection of a spacing slug of alkaline halide and then a fresh slug of polymer aqueous solution, the polarity of which is opposite to the polarity of the first polymer slug, and then a slug of aqueous solution of trivalent metal crosslinking agent to effect the partial crosslinking of the polymer charges, the polymer layers being successively added until the injection pressure of the polymer aqueous solutions show that the desired Residual Resistance Factor RRF was attained, and well production may be resumed.

Ionic liquids are incorporated into transducers, actuators or sensors which employ the ionic polymer membranes. The ionic liquids have superior electrochemical stability, low viscosity and low vapor pressure. The transducers, actuators and sensors which utilize ionic polymer membranes solvated with ionic liquids have long term air stability. Superior results are achieved when a conductive powder and ionomer mixture is applied to the ionic polymer membrane to form the electrodes during or after the ionic liquid is imbibed into the ionic polymer membrane.

Ultrasonically bonded laminated absorbent products comprising a liquid permeable top sheet, a liquid impermeable back sheet, an absorbent core positioned between the liquid permeable top sheet and the liquid impermeable back sheet, and an adhesive composition are disclosed. The laminated structure further comprising an embossed pattern stamped onto the liquid permeable top sheet, the liquid impermeable back sheet, the absorbent core, or any combination thereof. The adhesive composition comprises a mixture of atactic and isotactic polymers such that it has melt and flow characteristics similar to those of the topsheet and backsheet.

The invention discloses a lithium ion polymer battery pack assembling structure and an assembling method, which relate to a battery pack assembling structure and an assembling method. A lithium ion polymer battery is used in combination with a shell, it is difficult to replace a single battery in a battery pack once the single battery goes wrong, and the traditional assembling structure has no space for battery deformation and has a short service life. The lithium ion polymer battery pack assembling structure is characterized in that: adjacent batteries are isolated by an assembling bracket which is cuboid, a rectangular battery accommodating chamber is formed on the middle part of the assembling bracket, a side frame part of the assembling bracket is arranged on the periphery of the battery accommodating chamber which is matched with a battery groove, the side frame part is matched with a battery fixing part, and the height of the assembling bracket is greater than the thickness of the battery; and connection holes are formed on the four corners of the assembling bracket, lugs of the battery extend outside the side frame part of the assembling bracket, and the positive and negative lugs of the battery are bent and overlapped. The assembling bracket is arranged out of the battery pack for protection, a welding mode is avoided to prevent welding defective products, assembling and dismantling are convenient, the defective battery can be conveniently exchanged, the expansion factor of the battery is taken into consideration, and the service life of the product is prolonged.

Nanocomposite microcapsules for self-healing of composites. The nanocomposite microcapsules comprise a urea-formaldehyde shell encompassing a liquid core of polymerizable healing agent. The microcapsules further comprise nanoparticulates encompassed in the core and also present on the outer surface of the microcapsule shell. Self-healing composites with the nanocomposite microcapsules embedded in the composite polymer matrix are also described. Methods of making and using the same are also disclosed.

The invention discloses a preparation method of submicron CuS (copper sulphide) classification balls. The method comprises the following steps: adding polymer into a good solvent to dissolve and remove big gel particles; adding copper source solution to the good solvent and stirring; adding sulfur source solution and then stirring; reacting the reaction liquid under 100-1,000 KPa at 100-200 DEG C; naturally cooling to the room temperature to obtain black precipitate; and washing and drying the precipitate to obtain the classification balls. The classification balls has the advantages of cheap and readily available templates, environmental friendliness, safety without toxicity, renewability and high water solubility, the contents of raw materials are abundant in nature and the operation of the reaction system is simple; the size and structure of the prepared classification ball are adjustable: the diameter can be controlled by adjusting the molar weight of the added precursor, the template concentration, the reaction temperature and time and the like; the operation is simple; and the prepared classification balls have wide application value in the fields of catalyst, catalyst carrier, optical equipment, sensor, lithium-ion rechargeable battery cathode material, superconductor and the like.

A method for manufacturing a polymeric article having an integrated reinforcing element. A thermoplastic material is introduced into a mould, after which reinforcing elements are inserted into the mould cavity. A second layer of the thermoplastic material is introduced into the mould, after which the mould is closed, pressing and heating the mould to melt the thermoplastic material and form the article. The thermoplastic layers may be provided in powder, sheet, or pellet form. The reinforcing elements may comprise reinforcing fibres or reinforcing fabrics. A polymeric track for a vehicle may be produced from this method.