11897 results about "Silicone rubber" patented technology

An implantable stimulation lead is disclosed for placement in the coronary sinus region and its associated coronary vessels overlying the left side of a patient's heart. The lead comprises at least one proximal connector; at least one tissue stimulation electrode; at least one conductor coupled between the at least one proximal connector and the at least one stimulation electrode; and a lead body including a housing of insulating material enclosing the at least one conductor, the lead body having a relatively flexible distal portion of, for example, silicone rubber, having a length corresponding to the coronary sinus region of the heart, and a stiffer proximal portion of, for example, polyurethane. A robust transition joint comprising telescoped sections of the distal and proximal portions of the lead body couples the two portions of the lead body.

Also provided is a versatile lead delivery system including a stylet stop disposed within the distal portion of the lead body. The stylet stop defines an aperture dimensioned to pass a guide wire but not the enlarged distal tip of a stylet. The lead includes a tip electrode having a longitudinally extending bore dimensioned to permit passage of the guide wire through the tip electrode.

A silicone rubber composition comprising (A) an organopolysiloxane containing at least two aliphatic unsaturated bonds, (B) an organopolysiloxane of resin structure comprising SiO₂ units, R³_nR⁴_pSiO_0.5 units and R³_qR⁴_rSiO_0.5 units wherein R³ is vinyl or allyl, R⁴ is a monovalent hydrocarbon group free of aliphatic unsaturation, n is 2 or 3, p is 0 or 1, n+p=3, q is 0 or 1, r is 2 or 3, q+r=3, (C) an organohydrogenpolysiloxane having at least two SiH groups, and (D) a platinum catalyst cures into a silicone rubber having excellent rubbery and strength properties and little surface tack.

The present invention relates to a sensor 1 for acquiring physiological signals with improved silicone rubber in particular when the sensor 1 is included in a garment 7 and the person who wears the garment 7 is in high level activity, the invention furthermore relates to a device comprising the sensor, as well as garments 7 comprising the device.

The system for treating an internal organ has a generator source for producing a shock wave connected to a handheld or small shock wave applicator device 2, wherein the external housing 16 of the device 2 is hermetically sealed in a non-electrically conductive insulating skin membrane 5 being of a polymer material, preferably a silicone rubber or polyurethane rubber. Preferably the entire device 2 including the connectors 32, 33 and at least a 20 cm portion of attached cable 1 is sealed using a dip coating process or alternatively can use an insert molding process wherein the device 2 is placed in a mold 400 and the skin membrane 5 is injection molded around the entire housing 16 and the cable 1 has an outer skin 5 that abuttingly seals at a connection 32, 33 to the housing 16. The device 2 may further include an internal vacuum conduit connected to a vacuum system to detect leakages and in use may be used with a sterile sleeve cover with a similar vacuum system for leakage detection.

A transparent mounting sheet has a structure in which a one-sided re-peelable sheet, provided with a core member of a plastic film, a silicone rubber sheet that is laminated on a primer treated surface formed by one surface of the core member having been subjected to a primer treatment, and an acrylic adhesive agent layer that is laminated on the other surface of the core member, is bonded to at least one of surfaces of a gel sheet by the acrylic adhesive agent layer, and this transparent mounting sheet is used so that a protective panel for an electronic apparatus display window is mounted on a surface of a display in a manner so as to be re-peelable.

The mounting of a component subjected to pressure from a fluid requires special precautions if the component is made of wear resistant, hard and hence generally brittle material and may be destroyed by locally raised stresses. A fluidic component of this kind, made, for example, of silicon/glass is arranged in an elastomeric shaped component, made, for example, of silicon rubber. The inner contours of the elastomeric shaped component correspond to the outer contours of the fluidic component. The outer contours of the shaped component corresponds to the inner contours of a holder. Due to this "floating mounting" there are no unacceptable local pressure peaks and no deformation of the fluidic component. The device is particularly suitable for mounting a fluidic component made of glass or silicon, or miniature dimensions, subject to high pressure.

An improvement in an internal bolster for a corporeal access tube assembly wherein a retention balloon is preformed of relatively thick silicone rubber film. The balloon includes parallel front and rear sidewalls connected by a semi-circular treadwall, the front sidewall having a front retention surface thereon with a radial width equal to the radius of the treadwall. Annular sleeves at the inner periphery of each sidewall are sealed to the outer surface of a tube segment. Each sleeve extends forwardly of its corresponding sidewall.

An artificial body wall is disclosed herein. The artificial body wall may include a first layer and a second layer. The first layer is substantially formed of a silicone rubber and includes at least one of an artificial epidermis-dermis layer or an artificial subcutaneous layer. The second layer extends along and below the first layer and is substantially formed of a silicone rubber. The second layer includes at least one of an artificial fascia layer or an artificial muscle layer. At least one of the first layer or second layer may be vascularized.

This invention relates to a method of making flat sheet asymmetric membranes, including cellulose diacetate/cellulose triacetate blended membranes, polyimide membranes, and polyimide/polyethersulfone blended membranes by formulating the polymer or the blended polymers dopes in a dual solvent mixture containing 1,3 dioxolane and a second solvent, such as N,N′-methylpyrrolidinone (NMP). The dopes are tailored to be closed to the point of phase separation with or without suitable non-solvent additives such as methanol, acetone, decane or a mixture of these non-solvents. The flat sheet asymmetric membranes are cast by the phase inversion processes using water as the coagulation bath and annealing bath. The dried membranes are coated with UV curable silicone rubber. The resulting asymmetric membranes exhibit excellent permeability and selectivity compared to the intrinsic dense film performances.

The invention is drawn to silane copolymers prepared from the reaction of one or more polyisocyanates with one or more lubricious polymers having at least two functional groups, which may be the same or different, that are reactive with an isocyanate functional group and with one or more organo-functional silanes having at least two functional groups, which may be the same or different, that are reactive with an isocyanate functional group and at least one functional group reactive with a silicone rubber substrate. The silane copolymer coatings of the invention are elastic, lubricious, and resist wet abrasion. They are useful as coatings for polysiloxane (rubber) and other difficult to coat substrates, especially for medical devices, such catheters.

A prepreg for a printed wiring board, comprising a cyanate ester resin having a specific structure, a non-halogen epoxy resin, a silicone rubber powder as a rubber elasticity powder, an inorganic filler and a base material, which prepreg retains heat resistance owing to a stiff resin skeleton structure, has high-degree flame retardancy without the use of a halogen compound or a phosphorus compound as a flame retardant, and has a small thermal expansion coefficient in plane direction without using a large amount of inorganic filler, and a laminate comprising the above prepreg.

The present invention relates to silicone rubber compositions, methods for their preparation and uses thereof. In particular, the invention relates a heat curable silicone rubber composition comprising: 100 parts by weight of a defined HCR silicone elastomer; 0.5 to 30 parts by weight of hollow filler; and 0.1 to 3.0 parts by weight of a curing agent.

The invention relates to a high anti-tearing and high temperature vulcanized silicon rubber, which is made through mixing and vulcanization of peroxide vulcanization agent and a combination which uses methylvinyl silicone rubber as base adhesive. The combination, according to weight proportion, comprises 100 of methylvinyl silicone rubber with low vinyl content, 1 to 30 of hydroxyl silicone oil, 0.1 to 3 of inner mold release agent, 15 to 80 of reinforcement agent, 1 to 10 of methylvinyl silicone rubber with high vinyl content and 1 to 10 of hydrogen-containing silicone oil; wherein, the vinyl molar content of the low vinyl-content methyvinyl silicone rubber is 0.01 percent to 0.15 percent; the vinyl molar content of the high vinyl-content methylvinyl silicone rubber is 1 percent to 10 percent. The invention has the advantages that the high vinyl-content methylvinyl silicon rubber is added into the methylvinyl silicone rubber, leading unsymmetrical concentration-crosslinking or one place multiple crosslinking to be formed during sulfuration period and the silicone rubber to generate so large resistance at the place that the rubber is difficult to be torn. In addition, the broken and tensile strength of vulcanized silicon rubber products is up to 8.5 MPa, and the tear strength is up to 45 N/mm.

An implantable cardiac stimulation lead system for use with a stimulation device includes a lead body preferably having an outer diameter of less than 4 French and formed of a biocompatible material having a Young's modulus of at least 20,000 pounds per square inch. In the lead body, an inner insulator is composed of a suitable polymer such as PTFE or ETFE with an outer peripheral surface formed with a helical groove containing a conductor extending between a proximal connector and a distal tip electrode, and an outer insulator composed of polyurethane or silicone rubber or a combination thereof is positioned around the inner insulator. The lead system may be formed with a lumen for receiving a guidewire longitudinally through the lead body. A pair of insulated conductors may be received in the helical groove, one extending to the distal tip electrode, the other extending to a ring electrode proximally spaced from the distal tip electrode.

The invention discloses high-temperature resisting methyl vinyl silicone rubber as well as a prescription and a preparation process thereof. The high-temperature resisting modified silicon rubber material which has more than 300 DEG C of application temperature and can not crack when according with requirements of 550 DEG C, 4mm distance and high-temperature radiation for more than 12 minutes is prepared by adopting the following steps of: adding cerium oxide and polymide into the prescription in which methyl vinyl silicon crude rubber is taken as a rubber raw material to improve the heat-resisting temperature, adding hydroxy silicone oil, dimethyl silicon oil and a silane coupling agent to improve the oil-resisting performance, adding precipitation method white carbon black and gas-phase method white carbon black to improve the tearing-resistance strength, adding quartz power and kieselguhr to improve the tensile strength and matching technical schemes of the preparation process. The high-temperature resisting methyl vinyl silicone rubber overcomes the problems and the defects of poor high-temperature and aging resistance performance and short service life of the common silicone rubber in the prior art, satisfies the special requirements for the heat-resisting performance, the electrical strength and the mechanical strength of automotive rubber products, and ensures that the silicone rubber products achieve the aims of improving the high-temperature resistance performance and prolonging the service life.

The invention relates to the field of heat-conducting high-polymer composite materials, particularly a graphene-containing silicon rubber heat-conducting composite material and a preparation method thereof. The heat-conducting composite material is mainly composed of graphene, an inorganic heat-conducting filler and a silicon rubber matrix, wherein the graphene accounts for 0.1-10 wt% of the silicon rubber heat-conducting composite material, and the graphene constitutes a heat-conducting network in the heat-conducting composite material. The method comprises the following steps: uniformly compounding the inorganic heat-conducting filler, graphene, crosslinking agent and other assistants and silicon rubber on a double-roll open mill to obtain a heat-conducting silicon rubber prepolymer; and carrying out primary vulcanization on the prepolymer on a flat vulcanizing machine, and carrying out secondary vulcanization in a drying oven to finally obtain the composite heat-conducting silicon rubber. Since the two-dimensional graphene has large thickness-diameter ratio and can easily constitute an effective heat-conducting network in the silicon rubber, a small amount of two-dimensional graphene can obviously enhance the heat-conducting property of the silicon rubber (the heat conductivity coefficient at 40 DEG C is 4.98 W/m.K). The silicon rubber composite heat-conducting material can be widely used in the field of heat dissipation of electronic products.

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.

The invention relates to silicon rubber with high refractive index and high transparency for optical encapsulation and a preparation method thereof. The silicon rubber is prepared from a phenyl vinyl polysiloxane component A, a silicon resin component B containing phenyl vinyl, a phenyl component C containing hydrogen polyoxyalkylene, a platinum catalyst component D, a catalytic inhibitor component E, a modified polysiloxane component F, and a water remover component G in a mixing manner. The silicon rubber not only has over 1.50 of refractive index, but also is good in transparency, excellent in adhesion, and stable in performance, can resist heat and ultraviolet radiation for a long period of time, can meet various requirements of LED (light-emitting diode) encapsulation, and is an ideal encapsulation material of the LED. The silicon rubber can be packaged into a bi-component product; the product has good storage stability; and high transparency is still kept after the product is stored for over 6 months.