1138 results about "Radiation resistant" patented technology

Prostheses with improved chemical and mechanical properties manufactured that includes a radiation resistant and hydrolytically stable biocompatible fabric having outer and first and second ends with a textile fabric that includes a naphthalene dicarboxylate derivative polymer having the general formula:wherein R1 and R3 are the same or different groups and are independently selected from the naphthalene dicarboxylate derivative repeating unit (I), a hydrogen radical and a methyl radical. R2 is an alkylene radical having 1 to 6 carbon atoms; n is from 10 to 200. Also contemplated are implantable prostheses that are flat constructions useful as patches and filters or tubular constructions useful as vascular grafts. A further aspect of this invention provides a method for making a radiation and thermal resistant and hydrolytically stable, steam sterilizable biocompatible prosthesis.

The invention discloses an organic silicon potting adhesive with a high heat conduction capacity. The curing time of the additive type organic silicon potting adhesive with a high heat conduction capacity can be controlled by the temperature and the amount of the catalyst. The condensate has good mechanical and electrical properties, especially outstanding cohesive strength, high and low temperature resistance and radiation resistance. The inventive heat-conducting organic silicon potting adhesive includes component A and B: said component A is mixed by following parts by weight: 100 shares of organic silica-base adhesive, 10-80 shares of heat-conducting filling, 3-20 shares of reinforced-filling, 1-10 shares of catalyst; said component A is mixed by following parts by weight: 100 shares of organic silica-base adhesive, 10-80 shares of heat-conducting filling, and 1-10 shares curing agent.

The invention relates to a radiation-resistant earphone wire, particularly to signal lines having at least a radiation-resistant device on a predetermined position thereof and the radiation-resistant device including: a radiation absorber being a cylindrical body, made of a magnetic material with high permeability and having a first through hole in a middle thereof and a radiation blocker made of a metal sleeve body and coating on an outer periphery of the radiation absorber and a top of the radiation blocker corresponding to the first through hole has a second through hole for the signal lines passing through. Based on the features disclosed, the radiation absorber at an inner layer absorbs EMI radiation and the radiation blocker at an outer layer has a shielding effect and both the radiation absorber and the radiation blocker together form an anti-EMI structure, avoiding human brain damage caused by the electromagnetic waves.

The invention discloses an anti-single event effect static random access memory unit, which can effectively improve the single event upset resistance of a static random access memory (SRAM) unit and remarkably increase an upset threshold of an SRAM. The SRAM unit is a 14-transistor memory unit, and comprises two access N-channel metal oxide semiconductor (NMOS) transistors and two phase inverters, wherein each phase inverter consists of six metal oxide semiconductor (MOS) transistors. Different from the phase inverters forming the most basic six-transistor unit, the inverter structure of the anti-single event effect SRAM unit regulates a level by the two NMOS transistors as drive transistors, two P-channel metal oxide semiconductor (PMOS) transistors as load transistors and a transmission gate consisting of the PMOS transistor and the NMOS transistor so as to realize the anti-single event upset of the memory unit. The SRAM unit has a relatively simpler structure, and is easy to realize in the designing of a radiation resistant SRAM chip.

This invention concerns radiation durable organic compositions which are well-suited for use in 157 nm lithography by virtue of their high transparency and excellent radiation durability, and to a process for the preparation thereof.

The invention discloses a steel-structure-use nuclear-radiation-resistant paint which is characterized in that the paint comprises main agents, a curing agent, and a coupling agent. The main agents comprise epoxy resin, organosilicon modified epoxy resin, a radiation-resistant filling agent, a diluting agent, and a processing auxiliary agent. The paint is prepared from the components of, by mass: 100 parts of epoxy resin, 20-60 parts of organosilicon modified epoxy resin, 50-80 parts of radiation-resistant filling agent, 30-60 parts of the diluting agent, 2-5 parts of the processing auxiliary agent, 25-50 parts of the curing agent, and 1-3 parts of the coupling agent. A mass percentage ratio of the main agents to the curing agent is 6-11:1. The steel-structure-use nuclear-radiation-resistant paint provided by the invention has excellent radiation resistance and decontamination property. The paint does not precipitate environment-polluting harmful substances.

The invention relates to an epoxy protective coating system for a high-power nuclear power station. Priming coat comprises a component A1 and a component B with the weight ratio of 4-6, and finishing coat comprises a component A2 and the component B with the weight ratio of 3-5:1.. The component A1 comprises 20 to 50% of epoxy resin, 10 to 40% of anti-corrosion paint, 10 to 25% of radiation-resistant stuffing, 0.1 to 3% of addition agent and the balance of menstruum by weight percent. The component A2 comprises 20 to 50% of the epoxy resin, 10 to 40% of the anti-corrosion paint, 5 to 20% of the radiation-resistant stuffing, 0.1 to 3% of the addition agent and the balance of the menstruum by weight percent. The component B is a radiation-resistant epoxy-amine adduct curing agent, and is synthesized by 10 to 30% of liquid epoxy resin, 30 to 70% of polyamine with primary amine groups and 20 to 60% of the menstruum. The corrosion resistance and radiation resistance can meet the requirements of nuclear grade paint and can pass simulation DBA tests when the coating system is used for a high-power nuclear power station.

The invention relates to an epoxy resin based neutron and gamma ray shielding composite material, as well as a preparation method and an application thereof, belonging to the technical field of shielding materials, used for solving the following technical problems that the shielding property of a shielding material in the prior art is difficultly combined with other physical and mechanical properties; requirements of application flexibility and construction diversity cannot be satisfied; and furthermore, the preparation process is complex. The epoxy resin based neutron and gamma ray shielding composite material is composed of the following components in parts by weight: 5-15 parts of epoxy resin, 2-9 parts of a curing agent, 1-10 parts of a fast neutron moderator, 2-20 parts of a thermal neutron absorber, 65-85 parts of a gamma ray shielding agent, 0-3 parts of an inert diluent, 0-3 parts of an active diluent, 0-2 parts of an accelerant, and 0.5-5 parts of auxiliaries. The epoxy resin based neutron and gamma ray shielding composite material has excellent neutron and gamma ray mixing-field shielding property; furthermore, the epoxy resin based neutron and gamma ray shielding composite material is low in toxicity, free from smell, simple in preparation process and convenient to construct; and thus, the epoxy resin based neutron and gamma ray shielding composite material can be widely applied in various fields of strict radiation-resistant requirements.

The invention belongs to underwater robots, and in particular discloses a radiation resistant underwater monitoring robot. A remote controller transmits a control command to a master controller through a CAN bus; the control command is transmitted to a monitoring video recorder, a robot body, a tilt holder, underwater lighting, an underwater camera and a manipulator respectively by the master controller; the monitoring video recorder is a post-processing part for the video data acquisition of the underwater camera, and displays and records video information of the underwater camera; and the sensor acquires and transmits the information on the posture and the pressure of the robot body to the master controller. The robot can run 10 hours continuously under a radiation environment with the environmental dose of 10<5> rad, has a small volume, a compact structure and stable operations, combines automatic control and manual control, and meets the control with different motion requirements.