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Preparation method and application of diethyl phosphinates
InactiveCN101891762AShort reaction timeTrigger fastGroup 5/15 element organic compoundsReaction rateUltraviolet lights
The invention discloses a preparation method and application of diethyl phosphinates, belonging to the field of green flame retardants. The preparation method of the diethyl phosphinates comprises the following steps of: making hypophosphorous acid and / or an alkali metal salt thereof react with ethylene under the irradiation of ultraviolet light in the presence of a photoinitiator in a solvent system to obtain diethyl phosphinic acid and / or an alkali metal salt thereof; and making the obtained diethyl phosphinic acid and / or the alkali metal salt thereof react with metallic compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Ce, Sn and / or Fe to obtain corresponding diethyl phosphinates. In the invention, the photoinitiator is decomposed into free radicals under the irradiation of the ultraviolet light to initiate an additive reaction so that the reaction rate can be improved, the energy consumption required in the reaction can be reduced and the production cost of products can be lowered.
Owner:NANKAI UNIV
Process for preparing nano silicon dioxide-acrylate composite emulsion
The preparation process of nanometer composite silica-acrylate emulsion includes the following steps: mixing small molecular alcohol, silane as coupling agent, deionized water and acid solution through stirring; adding the hydrolyzed product of nanometer silica and silane as coupling agent into benzene derivative solvent under the protection of inert gas via stirring; centrifugal separation, flushing with alcohol or acetone and vacuum drying to obtain modified nanometer silica; dispersing acrylate monomer into fine emulsion; mixing the modified silica, anionic or non-ionic emulsifier, stabilizer and water, emulsifying and adding soluble persulfate or liposoluble peroxide; and adding the fine emulsion into the mixed solution to obtain the nanometer composite silica-acrylate emulsion. The present invention has less environmental pollution and is suitable for industrial application.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Low-voltage SCR (Silicon Controlled Rectifier) structure for ESD (Electronic Static Discharge) protection of integrated circuit chip
InactiveCN102034811AImprove protectionLower the trigger voltageSolid-state devicesDiodeSilicon-controlled rectifierLow voltage
The invention relates to a low-voltage SCR (Silicon Controlled Rectifier) structure for ESD (Electronic Static Discharge) protection of an integrated circuit chip, belonging to the technical field of electronics. The structure comprises two kinds of low-voltage SCR ESD protection devices, wherein the first kind of SCR ESD protection device integrates two N-well diodes and two NMOSs (N-channel Metal Oxide Semiconductors); the N-well diodes are connected between I / O (Input / Output) and a VDD (Virtual Device Driver); the NMOSs are connected between the VDD and VSS (Visual Source Safe); and the N-well diodes and the NMOSs form an SCR structure which provides ESD protection between PS and PD modes and VDD-VSS. The second kind of device integrates two P-well diodes and two PMOSs (P-channel Metal Oxide Semiconductors), wherein the P-well diodes are connected between the I / O and the VSS, and the PMOSs are connected between the VSS and the VDD, and the P-well diodes and the PMOSs jointly form an SCR structure which provides ESD protection between ND and NS modes and VDD-VSS. According to the invention, the chip has higher maintaining voltage and latch-up resistance effect during normal working and has lower triggering voltage and higher triggering speed during ESD; and the low-voltage SCR structure can effectively reduce the relative chip-occupying area of the protection devices and decrease parasitic capacitance at the same time of providing a plurality of modes of ESD protection functions and excellent ESD protection performance.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Fault current limiter based on fast switch and triggered vacuum switch
ActiveCN101604835ATrigger fastInhibit short circuit currentArrangements responsive to excess currentCapacitanceEngineering
A fault current limiter based on a fast switch and a triggered vacuum switch is disclosed, which comprises a fast switch (1) and a current limiting resistor (2) which are connected in parallel, wherein, a first pulse capacitor (3), a first inductor (4) and a first triggered vacuum switch (5) are connected in series between two ends of the fast switch (1); a second pulse capacitor (6), a second inductor (7) and a second triggered vacuum switch (8) are connected in series between two ends of the current limiting resistor (2). The invention: 1) enables short circuit current to be incapable of reaching a first current peak value in a state of infinite current; 2) causes arc current of the fast switch to achieve fast zero crossing and then arc blowout; 3) can pass through large pulse current at high triggering speed and can achieve arc blowout at the time of the zero crossing of the pulse current; 4) can rapidly inhibit the short circuit current; 5) and automatically limits current subsequent to the short circuit of a system to ensure quality of power supply and save establishment expenditure of network.
Owner:STATE GRID CORP OF CHINA +2
Synthesis method and application of water soluble chitosan-based flocculant
ActiveCN105622847ASpeed up homolysisThe polymerization reaction is fastWater/sewage treatment by flocculation/precipitationFunctional monomerAlcohol ethyl
The invention provides a synthesis method and application of a water soluble chitosan-based flocculant. The method comprises the steps of adding chitosan into acid solution, adding acylated monomer aqueous solution into the acid solution, uniformly stirring and mixing, performing vibration reaction for 1 to 10 h at 5 to 60 DEG C, performing precipitation and purification through ethyl alcohol and acetone, drying, and obtaining N-acylated chitosan; sequentially adding the N-acylated chitosan, deionized water, acrylamide and strong cation functional monomer into a reactor, uniformly stirring, leading nitrogen into homogenous solution to remove oxygen, adding a photoinitiator and a cosolvent, uniformly stirring and mixing, putting the raw materials into an ultraviolet light reaction device to perform polymerization reaction, drying, performing granulation and powder process, and obtaining the water soluble chitosan-based flocculant; the flocculant can be used for the removal treatment of alga in source water. The flocculant is good in solubility property, high in viscosity coefficient and short in synthesis time, does not need temperature reduction control, simplifies the production technology, reduces energy consumption, and reduces the production cost.
Owner:NANJING UNIV OF TECH
Polyvinylidene fluoride preparation method
ActiveCN104151457AAvoid insufficient purityLow reaction temperatureMechanical propertyCarboxylic acid halides
The present invention relates to a polyvinylidene fluoride preparation method, which comprises: introducing an acyl halide solution dispersed in a fluorine-containing organic solvent into a reaction kettle, adding a mixed solution comprising an inorganic alkali solution and hydrogen peroxide, carrying out a stirring reaction for 30-120 min at a temperature of -10-10 DEG C, carrying out in situ synthesis to obtain an initiator, introducing an aqueous solution of a dispersing agent, a vinylidene fluoride monomer and a chain transfer agent, carrying out a stirring reaction for 4-12 h at a temperature of 10-30 DEG C to prepare polyvinylidene fluoride, and carrying out filtering, washing, drying and crushing after completing the reaction to obtain the powdery product which is polyvinylidene fluoride resin powder. The powdery polyvinylidene fluoride resin has characteristics of good thermal stability, good physical property, good mechanical property, simple reaction process and easy control, and is suitable for industrial production.
Owner:DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
Key structure
ActiveCN106024474AChange speedSatisfy the feel requirementEmergency actuatorsElectric switchesSoftware engineeringRelative motion
Owner:DARFON ELECTRONICS (SUZHOU) CO LTD +1
Cationic visible light curing composition
The invention discloses a cationic visible light curing composition. The cationic visible light curing composition is prepared from 0.5 to 10 parts by weight of initiator, 0.5 to 30 parts by weight of reactive diluent and 70 to 90 parts by weight of bisphenol A epoxy resin, wherein the initiator comprises a cationic photoinitiator and a sensitizer with a weight ratio of 1 : (0.01 to 1). The cationic visible light curing composition can be cured and molded under the irradiation of visible light, and has the advantages of low requirement on equipment, lower cost, higher safety, smaller environmental pollution, high light sensitivity, and high light curing conversion rate; a curing conversion rate under the low illumination level smaller than 30 mW / cm<2> can reach 50 percent, and the initiator is high in initiation speed and highly efficient; and the cationic visible light curing composition is good in stability, low in toxicity, free from environmental pollution, inexpensive, easy to obtain and low-cost.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Virtualized network function VNF instance scaling method and VNF instance scaling device
The invention provides a virtualized network function VNF instance scaling method and a VNF instance scaling device. The method comprises the following steps: an element management system EMS determines a VNF instance needing scaling and an expected deployment flavor to which the VNF instance needs to be scaled; the EMS sends the identity of the VNF instance and scaling information determined according to the expected deployment flavor to a virtualized network function manager VNFM, wherein the identity of the VNF instance and the scaling information are used to instruct the VNFM to scale the VNF instance according to the scaling information. Through the method and the device, the problem that VNF scaling cannot be realized through EMS's trigger in the related technology is solved, VNF instance scaling is realized through EMS's trigger, and the trigger speed of VNF instance scaling is improved.
Owner:ZTE CORP
Protection equipment for open-wire wall-mounted socket
ActiveCN107026369ATrigger fastAvoid bad consequencesCoupling parts mountingFire protectionArchitectural engineering
The invention relates to electrical protection equipment, particularly to protection equipment for an open-wire wall-mounted socket, and aims to provide the protection equipment which can perform primary short-circuit protection and on-fire protection and cannot be inserted with a child finger carelessly by solving technical problems. For solving the technical problems, the invention provides the protection equipment for the open-wire wall-mounted socket; the protection equipment comprises mounting plates, first nuts, first threaded rods, a protection plate, a first supporting base and the like; wire inlet holes are formed in the left sides of the mounting plates on two sides; the first nuts are mounted in the middle parts of the outer sides of the mounting plates on two sides in a welding way; the first threaded rods are screwed in the corresponding first nuts; and the first threaded rods are screwed in the walls on the left sides of the mounting plates. The protection equipment can perform primary short-circuit protection and on-fire protection and cannot be inserted with a child finger carelessly; and left and right movement of a sliding sleeve can be controlled by adopting a second spring.
Owner:玉环墨痕机电科技有限公司
Method for preparing 2,6-dimethyl-2-heptanol
ActiveCN101125797AStable in natureEasy to storePreparation by hydrogenationOrganic grignard reactionsChemical industryGrignard reagent
The invention discloses a preparation method of an organism in chemical industry technical field, in particular to the preparation method of a 2, 6-Dimethyl-2-Heptanol. The invention is that: firstly methylic Grignard reagent is prepared through taking Benzyl magnesium Chloride or Benzyl magnesium Bromide as an initiator, then is carried out the Grignard reaction with 2-Methyl-2-Hepten-6-Ketone, and finally is catalyzed and hydrogenated to synthesize 2,6-Dimethyl-2-Heptanol. The initiator prepared by the invention has the advantages of relatively stable property, easy preservation, higher initiating speed compared with commonly used initiator, strong universality, low dosage, convenient storage and low toxicity, etc. The initiator is especially suitable for preparing Grignard Reagent in mass production. The product prepared by the invention has better security and higher yield. The prepared product can be widely used in essence prescription of daily chemistry.
Owner:格林生物科技股份有限公司
Double-sided screen touch control method, double-sided screen terminal, and readable storage medium
PendingCN109542325ATrigger fastSolve fatigueInput/output processes for data processingSignal onData signal
The invention provides a double-sided screen touch control method, which is applied to a double-sided screen terminal. The double-sided screen terminal comprises a main screen and a sub-screen. The method includes the following steps: setting a touch function of the secondary screen when detecting a secondary touch setting command; Receiving a touch signal on the sub-screen based on the set touchfunction of the sub-screen; Processing the received touch signal to obtain a corresponding touch action data signal; outputtihng The touch action data signal to the main screen to respond to the touchaction data signal and displaying a corresponding touch action on the main screen. The invention also provides a double-sided screen terminal, a readable storage medium. The invention solves the technical problems of poor manipulation of user fingers and easy fatigue of user fingers existing in the multi-fingered operation mode of the prior mobile terminal.
Owner:NUBIA TECHNOLOGY CO LTD
Two-component cationic visible-light initiator and application of two-component cationic visible-light initiator in photocuring technology
The invention discloses a two-component cationic visible-light initiator and application of the two-component cationic visible-light initiator in the photocuring technology. The two-component cationicvisible light initiator comprises diphenyl iodonium hexafluorophosphate and benzothiadiazole structural unit-based organic dye at a weight ratio of 1:(0.02-1), wherein diphenyl iodonium hexafluorophosphate with a CAS No. Of 58109-40-3) is a commercial ultraviolet photoinitiator, and the benzothiadiazole structural unit-based organic dye is adopted as a sensitizer of diphenyl iodonium hexafluorophosphate. The two-component cationic visible-light initiator has a wide absorption spectrum, curing molding of epoxide can be initiated under irradiation of a visible light source, and rapid curing canbe performed under low illumination of less than 30 mW / cm<2>, so that adoption of a traditional UV source with high energy consumption and large radiation is avoided; in addition, the benzothiadiazole structural unit-based organic dye has small synthesis difficulty, few steps and low-cost raw materials.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Fluorine-containing compound, application, ethylene oligomerization catalyst composition, ethylene oligomerization method, ethylene trimerization method and ethylene tetramerization method
ActiveCN111434667AImprove catalytic performanceTrigger fastGroup 5/15 element organic compoundsOrganic-compounds/hydrides/coordination-complexes catalystsPolymer sciencePtru catalyst
The invention discloses a fluorine-containing compound shown as a formula I and application of the fluorine-containing compound serving as a ligand of an ethylene oligomerization catalyst composition.The invention also discloses the ethylene oligomerization catalyst composition containing the fluorine-containing compound, and an ethylene oligomerization method, an ethylene trimerization method and an ethylene tetramerization method adopting the catalyst composition. The fluorine-containing polymer according to the present invention is used as a ligand for an ethylene oligomerization catalyst,and can effectively improve the catalytic performance of a catalyst system; particularly, the catalyst shows obviously improved catalytic performance in ethylene oligomerization reaction; the catalyst activity can exceed 4*10<8> g.mol (Cr)<-1>.h<-1> at most, the total selectivity of 1-hexene and 1-octene exceeds 92wt%, the content of 1-hexene in a C6 product can reach about 98%, and the content of 1-octene in a C8 product can reach 98% or above. The catalyst composition provided by the invention has good industrial application prospect and economic value.
Owner:CHINA PETROLEUM & CHEM CORP +1
Preparation method of 2-dimethyl-2-octanol
InactiveCN103058823AStable in natureEasy to storeOrganic compound preparationHydroxy compound preparationGrignard reagentMethylmagnesium chloride
The invention discloses a preparation method of 2-dimethyl-2-octanol. Methyl Grignard reagent is prepared by using methyl magnesium chloride or methyl magnesium bromide as an initiator. The 2-dimethyl-2-octanol is prepared by carrying out reaction of the methyl Grignard reagent and 2-octanone. The preparation method of the 2-dimethyl-2-octanol is suitable for continuous production, iodine is used for initiation for the first time, halogenated methane liquid state is added in the iodine in a dropwise manner to prepare an methyl magnesium chloride initiator and an methyl magnesium bromide initiator, and the methyl Grignard reagent produced in the previous production is completely adopted as the initiator in subsequent production to carry out the continuous production. The properties of the initiators of the preparation method are relatively stable. The initiator is easy to store, compared with a common initiator, the initiator has the advantages of being fast in initiation speed, strong in generality, low in usage, convenient to store and low in toxicity and the like, and is especially suitable for the preparation for the Grignard reagent in mass production. According to the preparation method of the 2-dimethyl-2-octanol, preparation safety is good, and production yield is high.
Owner:HUAIAN WAN BANG SPICE IND CO LTD
A kind of synthetic method and application of water-soluble chitosan-based flocculant
ActiveCN105622847BSpeed up homolysisThe polymerization reaction is fastWater/sewage treatment by flocculation/precipitationFunctional monomerAlcohol ethyl
The invention provides a synthesis method and application of a water soluble chitosan-based flocculant. The method comprises the steps of adding chitosan into acid solution, adding acylated monomer aqueous solution into the acid solution, uniformly stirring and mixing, performing vibration reaction for 1 to 10 h at 5 to 60 DEG C, performing precipitation and purification through ethyl alcohol and acetone, drying, and obtaining N-acylated chitosan; sequentially adding the N-acylated chitosan, deionized water, acrylamide and strong cation functional monomer into a reactor, uniformly stirring, leading nitrogen into homogenous solution to remove oxygen, adding a photoinitiator and a cosolvent, uniformly stirring and mixing, putting the raw materials into an ultraviolet light reaction device to perform polymerization reaction, drying, performing granulation and powder process, and obtaining the water soluble chitosan-based flocculant; the flocculant can be used for the removal treatment of alga in source water. The flocculant is good in solubility property, high in viscosity coefficient and short in synthesis time, does not need temperature reduction control, simplifies the production technology, reduces energy consumption, and reduces the production cost.
Owner:NANJING TECH UNIV
Electrostatic discharge protecting component and method for manufacturing the same
InactiveCN1501494ATrigger fastImprove enduranceSemiconductor/solid-state device detailsSolid-state devicesEngineeringGate oxide
The invention relates to a metal-oxide semiconductor (MOS) arrangement for electrostatic discharge protection, the double grid arrangement manufacturing process is to make a first grid oxidation layer having a first thickness, and a second grid oxidation layer having a second thickness, wherein the first thickness is less than the second thickness, the MOS arrangement includes at least a first island arrangement and a grid arrangement, the first island arrangement has a first conductive block and a first grid oxide block, the first conductive block is stacked on the fist grid oxide block. The grid arrangement has a grid dielectric layer which is thicker than the first grid oxidation layer.
Owner:WINBOND ELECTRONICS CORP
Intercepting device in mining intercepting system and using method
PendingCN111824204AEffective direct interceptionLong-term stabilityPositive railway stopsMarine engineeringControl circuit
The invention discloses an intercepting device in a mining intercepting system and a using method. The intercepting device comprises a ground hook device and a ground hook triggering device. When thetriggering device receives an alarm signal sent by the stall rubber-tyred vehicle, an electromagnet is immediately controlled to act by a control circuit in the device; the electromagnet moves forwards to destroy the balance of the hinge structure, the heavy weight hung on the whole hinge structure falls off, the steel wire rope connected to the heavy object is driven to lift upwards, the other end of the steel wire rope drives the pin triggering the ground hook to transversely move to release the ground hook, the ground hook is popped up from the ground by the spring, therefore, the draggingsteel wire rope on the stall mining vehicle can be hung on the ground hook in time, the steel wire rope on the ground hook depends on the braking force generated by the automatic torque increasing device, then the force is amplified through the steel wire rope buffer to drag the vehicle, the vehicle is stopped within a short time, and the purpose of protecting the stall mining vehicle is achieved.
Owner:XIAN UNIV OF SCI & TECH
T/R component phase shift accuracy testing method and system based on trigger function
ActiveCN109030986ASimplify test compositionTrigger fastElectrical testingPhase shiftedPersonal computer
The invention discloses a T / R component phase shift accuracy testing method and system based on a trigger function. The method comprises the following steps that: after a state controller receives a phase shift starting instruction, continuously outputting N states of phase shift instructions to the T / R component; after each state of phase shift instruction takes effect, outputting a measurement synchronization signal to the "external trigger input" port of a vector network analyzer to trigger scanning; monitoring the measurement finishing signal of the "external trigger ready" port of the vector network analyzer in real time; and taking the current measurement finishing signal of the vector network analyzer as a next state of phase shift instruction beginning signal. The method has the beneficial effects that the frequency for an industrial personal computer to read the test data of the vector network analyzer is changed into one from 64, and testing efficiency is improved.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP
Outer-soft inner-rigid downstream face waterproof material and preparation method and application thereof
InactiveCN111621231AFast curingImprove early strengthProtective foundationBuilding insulationsAluminateBitumen emulsion
The invention discloses a downstream face waterproof material with soft exterior and rigid interior as well as a preparation method and an application of the downstream face waterproof material. The waterproof material comprises a component A and a component B. The component A comprises emulsified asphalt, an acrylate emulsion, an alkali swelling thickener, a polyurethane thickener, a dispersant,a multifunctional auxiliary agent, an antifoaming agent, a bactericide, ground calcium carbonate powder, bentonite, an organosilicon water repellent, sodium silicate, a photoinitiator, a cross-linkingagent and water; and the component B comprises sulphoaluminate cement, gypsum, silica fume, mineral powder, fly ash, citric acid, magnesium fluosilicate, magnesium oxide, sodium silicate, a reinforcing component and fumed silica. The waterproof material disclosed by the invention has rapid curing and self-healing properties; the material has the advantages of strong water impermeability, high tensile strength, high bonding strength and high and low temperature resistance, solves the problems that secondary or tertiary coating and vertical surface sagging cannot be carried out on a base surface of a downstream surface in a short time, and the vertical surface coated with the coating cannot be tiled and a pipe root part cannot be used, and has a wide application range.
Owner:SUZHOU GUARDEX NEW MATERIAL TECH CO LTD
Method for catalytically synthesizing polycarboxylate water reducing agent by zinc salt
The invention discloses a method for catalytically synthesizing a polycarboxylate water reducing agent by zinc salt. The method is characterized by comprising taking macromonomer, small monomer, chaintransfer agent, reducing agent, oxidant, catalyst and water; mixing the small monomer and the chain transfer agent to prepare a liquid A; mixing the reducing agent and the water to prepare a liquid B; adding the macromonomer and the water into a reactor with a thermometer, and heating and stirring; when the temperature reaches 47-52 DEG C and the macromonomer is completely dissolved, adding the oxidant, mixing, and adding dropwise at a uniform speed into the liquid A and the liquid B, wherein the total time for dropwise adding and heat insulation reaction is 2-2.5 h, cooling the materials after the reaction to room temperature, and obtaining the polycarboxylate water reducing agent. By the adoption of the method, the reaction temperature is low, the production efficiency is high, the production cost is low, the product dispersing performance and slump retention performance are good, industrial production can be performed, the practicality is high, and the obtained polycarboxylate water reducing agent is particularly suitable for preparation of cement-based building materials.
Owner:SOUTHWEAT UNIV OF SCI & TECH
Method for preparing 2,6-dimethyl-2-heptanol
ActiveCN100516010CStable in natureEasy to storePreparation by hydrogenationOrganic grignard reactionsChemical industryGrignard reagent
The invention discloses a method for preparing organic matter in the technical field of chemical industry, in particular a method for preparing 2,6-dimethyl-2-heptanol. The present invention uses benzylmagnesium chloride or benzylmagnesium bromide as an initiator to prepare methyl Grignard reagent, then carries out Grignard reaction with 2-methyl-2-hepten-6-one, and then catalyzes hydrogenation to synthesize 2 , 6-Dimethyl-2-heptanol. The initiator prepared in the present invention is relatively stable in properties and easy to store. Compared with commonly used initiators, it has the characteristics of fast initiation speed, strong versatility, small dosage, convenient storage, and low toxicity, and is especially suitable for large-scale production. Preparation of Reagent's Reagent. The preparation of the product of the present invention has more safety and higher product yield. The product of the invention can be widely used in the formula of daily chemical essence.
Owner:格林生物科技股份有限公司
Halogen-containing compound, application, catalyst composition, ethylene oligomerization method, ethylene trimerization method and ethylene tetramerization method
ActiveCN111434668AImprove catalytic performanceTrigger fastOrganic-compounds/hydrides/coordination-complexes catalystsGroup 5/15 element organic compoundsPolymer sciencePtru catalyst
The present invention discloses a halogen-containing compound represented by a formula I, and application of the halogen-containing compound as a ligand of an ethylene oligomerization catalyst composition, with Z being a divalent linking group represented by a formula II or a formula III. The invention also discloses the ethylene oligomerization catalyst composition containing the halogen-containing compound, and an ethylene oligomerization method, an ethylene trimerization method and an ethylene tetramerization method adopting the catalyst composition. According to the present invention, withthe application of the fluorine-containing polymer as the ligand of the ethylene oligomerization catalyst, the catalytic performance of the catalyst system can be effectively improved, and the significantly-improved activity and the significantly-improved selectivity are particularly provided in the ethylene oligomerization reaction. The catalyst composition provided by the invention has good industrial application prospect and economic value.
Owner:CHINA PETROLEUM & CHEM CORP +1
Halogen-containing compound and its use, catalyst composition, ethylene oligomerization method, ethylene trimerization method, and ethylene tetramerization method
ActiveCN111434668BImprove catalytic performanceTrigger fastGroup 5/15 element organic compoundsOrganic-compounds/hydrides/coordination-complexes catalystsPolymer sciencePtru catalyst
The invention discloses a halogen-containing compound represented by formula I and its use as a ligand for an ethylene oligomerization catalyst composition, wherein Z is a divalent linking group represented by formula II or formula III; the invention also discloses An ethylene oligomerization catalyst composition containing the halogen-containing compound and an ethylene oligomerization method, an ethylene trimerization method and an ethylene tetramerization method using the catalyst composition are disclosed. The fluorine-containing polymer according to the present invention is used as a ligand for the catalyst for ethylene oligomerization, and can effectively improve the catalytic performance of the catalyst system, especially showing significantly improved activity and selectivity in the ethylene oligomerization reaction. The catalyst composition according to the invention has good industrial application prospect and economic value.
Owner:CHINA PETROLEUM & CHEM CORP +1
A kind of protection equipment for open wire wall socket
ActiveCN107026369BTrigger fastAvoid bad consequencesCoupling parts mountingFire protectionArchitectural engineering
The invention relates to electrical protection equipment, particularly to protection equipment for an open-wire wall-mounted socket, and aims to provide the protection equipment which can perform primary short-circuit protection and on-fire protection and cannot be inserted with a child finger carelessly by solving technical problems. For solving the technical problems, the invention provides the protection equipment for the open-wire wall-mounted socket; the protection equipment comprises mounting plates, first nuts, first threaded rods, a protection plate, a first supporting base and the like; wire inlet holes are formed in the left sides of the mounting plates on two sides; the first nuts are mounted in the middle parts of the outer sides of the mounting plates on two sides in a welding way; the first threaded rods are screwed in the corresponding first nuts; and the first threaded rods are screwed in the walls on the left sides of the mounting plates. The protection equipment can perform primary short-circuit protection and on-fire protection and cannot be inserted with a child finger carelessly; and left and right movement of a sliding sleeve can be controlled by adopting a second spring.
Owner:玉环墨痕机电科技有限公司
A cationic visible light curable composition
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Rectangular coordinate type submerged-arc welding robot
A rectangular coordinate type submerged-arc welding robot comprises: a controller which is used for transmitting a control instruction, receiving detection signal data and setting welding parameters so as to achieve automatic welding; a rectangular coordinate movement device which is used for adjusting the welding position; a welding loop device which is used for forming a welding loop to conduct automatic welding, wherein the welding loop device comprises a welding power source, a wire feeding assembly, a welding gun and a welding flux recycling device, and the welding flux recovery device is used for recovering redundant welding flux; a welding wire detection device which is used for detecting whether a welding wire is used up or not; a laser tracking device which is used for detecting welding seam characteristics, wherein the laser tracking device comprises a laser sensor, a laser sensing driver and a welding assembly.
Owner:济南时代新纪元科技有限公司
A two-component cationic visible light initiator and its application in photocuring
The invention discloses a two-component cationic visible-light initiator and application of the two-component cationic visible-light initiator in the photocuring technology. The two-component cationicvisible light initiator comprises diphenyl iodonium hexafluorophosphate and benzothiadiazole structural unit-based organic dye at a weight ratio of 1:(0.02-1), wherein diphenyl iodonium hexafluorophosphate with a CAS No. Of 58109-40-3) is a commercial ultraviolet photoinitiator, and the benzothiadiazole structural unit-based organic dye is adopted as a sensitizer of diphenyl iodonium hexafluorophosphate. The two-component cationic visible-light initiator has a wide absorption spectrum, curing molding of epoxide can be initiated under irradiation of a visible light source, and rapid curing canbe performed under low illumination of less than 30 mW / cm<2>, so that adoption of a traditional UV source with high energy consumption and large radiation is avoided; in addition, the benzothiadiazole structural unit-based organic dye has small synthesis difficulty, few steps and low-cost raw materials.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Bidirectional SCR device triggered by diode
PendingCN113421924ATrigger fastBidirectional symmetrical device characteristicsThyristorSolid-state devicesMaterials scienceAnalytical chemistry
The invention discloses a bidirectional SCR device triggered by a diode. A deep N well is arranged on a P-type substrate, a first P well, an N well and a second P well are sequentially arranged on the deep N well, a first groove is formed in the upper surface of the first P well, a second groove is formed in the junction of the first P well and the N well, a third groove is formed in the junction of the N well and the second P well, and a fourth groove is formed in the upper surface of the second P well; a first P+ injection region and a first N+ injection region are arranged on the two sides of the first groove, a first N+ injection region and a second N+ injection region are arranged on the two sides of the second groove, a second N+ injection region and a third N+ injection region are arranged on the two sides of the third groove, and a third N+ injection region and a second P+ injection region are arranged on the two sides of the fourth groove; the first P+ injection region and the first N+ injection region are connected with the anode, and the third N+ injection region and the second P+ injection region are connected with the cathode; and the second N+ injection region is connected with a diode D3 and a diode D4 through a diode string DS0. The SCR device is high in triggering speed.
Owner:XIAN UNIV OF TECH
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