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Low-hardness and high-elasticity water treatment membrane component epoxy pouring sealant preparation method and application
The invention discloses a low-hardness and high-elasticity water treatment membrane component epoxy pouring sealant preparation method and application. An epoxy pouring sealant comprises a component Aand a component B, the component A comprises, by weight, 30-70 parts of epoxy resin, 5-20 parts of activated thinners, 10-20 parts of toughening agents, 5-30 parts of fillers and 0.1-3 parts of coupling agents, the component B comprises, by weight, 20-50 parts of polyether amine, 40-70 parts of alicyclic amine and 2-15 parts of curing accelerators, and the weight ration of the component A to thecomponent B is (100:10)-(100:50). By the aid of a 'trinity' toughening modified mode of the flexible toughening agents, the activated toughening thinners and flexible curing agents, the epoxy pouringsealant is characterized of low hardness, high elasticity and stable hardness within wide temperature range, the epoxy pouring sealant has excellent adhesive performance and is low in initial viscosity, high in mold filling speed, simple and convenient to operate and applicable to the fields such as package of water treatment membrane components and flexible package of electronic devices, and theblocking efficiency of the membrane components can be greatly improved.
Owner:浙江航通舟新材料科技股份有限公司
Fluorosilicone functional macromonomer with alkene double bond on single end and preparation method thereof
The present invention discloses a fluorosilicone functional macromonomer with alkene double bond on single end and a preparation method thereof. The monomer has a structure shown as a formula I or formula II. The fluorosilicone functional macromonomer prepared by the invention can be used in further copolymerization reaction with vinyl monomer, such as styrene and acrylate monomer, and endows the acrylic resin and styrene resin with characteristics of heat resistance, smoothness and weather resistance. The present invention uses an anion ring opening polymerization method for synthesis of a fluorine-containing organosilicon macromonomer with reactive functional group on single end, wherein the macromonomer has clear structure, controllable molecular weight and narrow molecular weight distribution. The macromonomer can be in active controllable polymerization with vinyl monomer to synthesize a block-type graft copolymer with improved physical and chemical properties, and has broad application prospects.
Owner:ZHEJIANG SCI-TECH UNIV
End-functionalized rubber as well as preparation method and application thereof
ActiveCN106008864AImprove bindingReduce rolling resistanceRolling resistance optimizationCarbon blackOrganic compound
The invention discloses end-functionalized rubber as well as a preparation method and an application thereof. According to the method, a polarized organic compound is taken as a modifier, organolithium is taken as an initiator, and conjugated diene or / and vinyl aromatic hydrocarbon is / are initiated to be subjected to anionic polymerization in a hydrocarbon solvent for synthesis of an active polymer; the active polymer is subjected to a reaction with a diphenylethlene capping agent, and a capped active polymer is obtained; the capped active polymer is subjected to a terminating reaction with a novel siloxane-containing aromatic imine terminating agent, and functionalized rubber with a siloxy-amido group as an end group is prepared; finally, the synthesized end-functionalized rubber is mixed with complexing agents including a reinforcing agent, a vulcanizing agent, an accelerant and the like, a rubber composite is prepared and vulcanized, and a rubber material with low rolling resistance, high slipping resistance and other performance is obtained. The end-functionalized rubber synthesized with the method and the rubber material prepared from the end-functionalized rubber have good interaction with carbon black / white carbon black and can be applied to the tire industry.
Owner:DALIAN MARITIME UNIVERSITY
Steel pipe end sealing device and using method
PendingCN111153001APhosphating effect will not be reducedReduce deliveryMetallic material coating processesPackagingButt jointElectric machinery
The invention discloses a steel pipe end sealing device, and relates to the technical field of machining. The steel pipe end sealing device comprises a rack arranged on a plane and a conveying devicearranged inside the rack, wherein the conveying device comprises a sliding base arranged inside the rack, a clamping wheel plate arranged inside the rack and a fixing device arranged above the rack, the fixing device comprises a placing frame arranged above the rack, telescopic motors arranged on the placing frame, a fixing base arranged inside the placing frame, a semicircular arc-shaped surfaceis formed in the fixing base and a pushing and pressing device arranged on one side of the rack and fixedly connected with the rack, and the pushing and pressing device comprises a butt joint pipe arranged on the outer side of the rack, an end sealing cover arranged inside the butt joint pipe and a pushing and pressing air cylinder arranged on one side of the butt joint pipe. According to the steel pipe end sealing device and the using method, the problems that high firmness cannot be kept and the sleeving efficiency is low when an end sealing sleeve manually sleeves an end port of a steel pipe, and the end sealing sleeve is easily caused to fall off are prevented.
Owner:ZHANGJIAGANG CITY SHENGDINGYUAN PIPE MAKING
Alkoxyl end-capped dealcoholized silicone sealant and preparation method thereof
ActiveCN103756628AGood storage stabilityMild capping reaction conditionsNon-macromolecular adhesive additivesOther chemical processesDimethyl siloxaneTackifier
The invention discloses an alkoxyl end-capped dealcoholized silicone sealant and a preparation method thereof. The alkoxyl end-capped dealcoholized silicone sealant comprises the following components in parts by weight: 100 parts of alpha, omega-dihydroxyl polydimethylsiloxane, 10-20 parts of an end-capped polymer, 3-5 parts of an end capping catalyst, 15-20 parts of a titanate coupling agent, 50-80 parts of a reinforcing agent, 5-10 parts of a crosslinking agent and 5-8 parts of a tackifier. The alkoxyl end-capped dealcoholized silicone sealant is prepared through the steps of end capping treatment, purification treatment and mixing. The method has the advantages that alkoxyl end capping is performed on a reaction polymer, so that the storage stability of the sealant is enhanced, and the storage time is over 12 months; the conditions of an end capping reaction are mild, the end capping efficiency is high, and continuous production is available; the generated alkoxyl end-capped dealcoholized silicone sealant has excellent mechanical properties, and can meet the requirements of electronic-grade products.
Owner:西卡(江苏)工业材料有限公司
Straw plate producing and processing system
ActiveCN106003280AEquipment collocation is reasonableGood continuityLamination ancillary operationsLaminationRice strawProcess engineering
A straw plate producing and processing system comprises a main production system and a material recycling and dust removing system. The material recycling and dust removing system is arranged at the upper end of the main production system. The main production system is composed of a straw supplying and feeding module, an unbundling module, a stepping separation module, a straw conveying module, a forming module, a conveying module, a cut-off module and an end sealing module. The material recycling and dust removing system is composed of a material recycling module and a dust removing module. The straw supplying and feeding module, the unbundling module, the stepping separation module, the straw conveying module, the forming module, the conveying module, the cut-off module and the end sealing module are sequentially connected from left to right. The material recycling module is connected with the dust removing module. The straw plate producing and processing system is reasonable in overall system device matching, good in continuity and high in transfer efficiency; and in the production process, no auxiliary materials need to be added, straw plates are completely formed by processing straw, and the high-quality, high-strength and purely-natural straw plates can be produced.
Owner:高唐融知融智科技服务有限公司
A kind of fluorine-silicon functional macromonomer containing ethylenic double bond at one end and preparation method thereof
The present invention discloses a fluorosilicone functional macromonomer with alkene double bond on single end and a preparation method thereof. The monomer has a structure shown as a formula I or formula II. The fluorosilicone functional macromonomer prepared by the invention can be used in further copolymerization reaction with vinyl monomer, such as styrene and acrylate monomer, and endows the acrylic resin and styrene resin with characteristics of heat resistance, smoothness and weather resistance. The present invention uses an anion ring opening polymerization method for synthesis of a fluorine-containing organosilicon macromonomer with reactive functional group on single end, wherein the macromonomer has clear structure, controllable molecular weight and narrow molecular weight distribution. The macromonomer can be in active controllable polymerization with vinyl monomer to synthesize a block-type graft copolymer with improved physical and chemical properties, and has broad application prospects.
Owner:ZHEJIANG SCI-TECH UNIV
Preparation method of alkoxy-terminated polydimethylsiloxane
ActiveCN113512197AHigh end-capping efficiencySimple production processPhosphoric Acid EstersO-Phosphoric Acid
The invention discloses a preparation method of alkoxy-terminated polydimethylsiloxane, wherein the preparation method comprises the following steps: (1) mixing DMC and hexamethyldisiloxane, heating to 160-180 DEG C, dropwise adding phosphoric acid, stirring for 6-8 hours, and refluxing to remove water to obtain a silicon phosphate terminator; and (2) heating a linear body to 130-150 DEG C, adding a potassium hydroxide aqueous solution, stirring for condensation polymerization, monitoring the viscosity on line, adding the silicon phosphate terminator obtained in the step (1) before the target viscosity is reached, continuously reacting for 5-50 minutes, vacuumizing, carrying out reduced pressure distillation to remove low-boiling-point substances, and thus obtaining the alpha,omega-dihydroxy polydimethylsiloxane with different viscosities. By adopting the preparation method of the alkoxy-terminated polydimethylsiloxane with the structure, the prepared alkoxy-terminated polydimethylsiloxane has the advantages of high terminating efficiency, convenient production process and good storage stability.
Owner:新纳奇材料科技江苏有限公司
Alkoxy-terminated 107 adhesive, and preparation method and application thereof
ActiveCN104479132AMild capping reaction conditionsHigh end-capping efficiencyCoatingsAdhesivesAdhesiveDichlorosilane
The invention provides an alkoxy-terminated 107 adhesive and a preparation method thereof. The terminal group of the 107 adhesive is terminated by R'aSiOR''(4-a). The preparation method comprises the following steps: (1) adding dihydroxy polydimethylsiloxane and dimethyl dichlorosilane into a reaction kettle, reacting at 8-15 DEG C, and adding an acid-binding agent; (2) after the reaction in the step (1) finishes, continuing adding the R'aSiOR''(4-a), reacting at 60-80 DEG C, and after the reaction finishes, continuing heating to 90-110 DEG C, thereby preparing the product alkoxy-terminated 107 adhesive. When the alkoxy-terminated 107 adhesive is tested by a conventional detection method, the result proves that the termination reaction achieves favorable effect, has the advantages of mild conditions and high termination efficiency and can implement continuous production.
Owner:兆舜科技(广东)有限公司
A kind of alkoxy-terminated dealcoholized silicone sealant and preparation method thereof
ActiveCN103756628BGood storage stabilityMild capping reaction conditionsNon-macromolecular adhesive additivesOther chemical processesDimethyl siloxaneTackifier
The invention discloses an alkoxyl end-capped dealcoholized silicone sealant and a preparation method thereof. The alkoxyl end-capped dealcoholized silicone sealant comprises the following components in parts by weight: 100 parts of alpha, omega-dihydroxyl polydimethylsiloxane, 10-20 parts of an end-capped polymer, 3-5 parts of an end capping catalyst, 15-20 parts of a titanate coupling agent, 50-80 parts of a reinforcing agent, 5-10 parts of a crosslinking agent and 5-8 parts of a tackifier. The alkoxyl end-capped dealcoholized silicone sealant is prepared through the steps of end capping treatment, purification treatment and mixing. The method has the advantages that alkoxyl end capping is performed on a reaction polymer, so that the storage stability of the sealant is enhanced, and the storage time is over 12 months; the conditions of an end capping reaction are mild, the end capping efficiency is high, and continuous production is available; the generated alkoxyl end-capped dealcoholized silicone sealant has excellent mechanical properties, and can meet the requirements of electronic-grade products.
Owner:西卡(江苏)工业材料有限公司
S-containing polymer and preparation method thereof
The invention relates to a preparation method of a sulfur-containing polymer, and belongs to the field of polymer synthesis. According to the preparation method of the S-containing polymer, the preparation method comprises the following steps: 1) carrying out blending reaction on raw materials such as a sulfur-containing monomer and a dihalogenated monomer by adopting a tandem micro-channel reactor to obtain a sulfur-containing polymer solution; 2) feeding the sulfur-containing polymer solution obtained in the step 1) into another group of parallel micro-channel reactors, and reacting with an end group control agent solution at 240-280 DEG C to prepare a sulfur-containing polymer mixed solution; and (3) purifying to obtain a product, namely the S-containing polymer. The micro-channel reactor is introduced into the preparation process of the S-containing polymer for the first time, and the polymer with narrow molecular weight distribution can be prepared; besides, by controlling the feeding amount and feeding speed of the sulfur-containing monomer and the dihalogenated monomer and the number of reaction modules of the microchannel reactor, the reaction ratio and the molecular weight and molecular weight distribution of the sulfur-containing polymer can be controlled.
Owner:SICHUAN UNIV
A kind of alkoxy-terminated 107 glue and its preparation method and use
ActiveCN104479132BMild capping reaction conditionsHigh end-capping efficiencyCoatingsAdhesivesAdhesiveDichlorosilane
Owner:兆舜科技(广东)有限公司
Dual-curable polysiloxane as well as preparation method and application thereof
ActiveCN112442177AHigh capping rateLight curing energy is lowChemical industryCoatingsPolymer scienceEnd-group
The invention discloses double-curable polysiloxane as well as a preparation method and application thereof. Acrylate groups contained in the molecular structure of polysiloxane can be quickly cross-linked and cured under the condition of ultraviolet irradiation, and moisture curing groups are contained in the end group structure, so that the polymer has moisture curing and UV light curing capabilities at the same time. According to a synthetic route provided by the invention, generation of acrylate can be avoided, silicon hydroxyl residue is lower than 1%, energy required by photocuring of the polymer is reduced, and the damp-heat aging resistance of a cured product is improved.
Owner:WANHUA CHEM GRP CO LTD +1
Chip positioning apparatus and chip positioning method
ActiveCN105826093AOrientation is correctHigh end-capping efficiencyEncapsulating capacitors apparatusTerminal applying apparatusCeramic capacitorEngineering
The invention discloses a chip positioning apparatus and a chip positioning method. The chip positioning apparatus comprises the following steps: a guide plate having a plurality of first through holes in uniform arrangement, the length and width of each first through hole matching the length and thickness of a chip; a positioning plate having a plurality of second through holes in uniform arrangement, the number and distribution position of the plurality of second through holes matching those of the plurality of first through holes, the width of each second through hole equal to that of each first through hole, the length of each second through hole greater than that of each first through hole, and the length of each second through hole greater than the sum of the length and the width of the chip, the depth of each second through hole no smaller than one third of the length of the chip and the depth of each second through hole no greater than half of the length of the chip; and a cross bar having a length greater than the width of the positioning plate. The chip positioning apparatus can guarantee correct orientation of the chip of an inverted multi-layer ceramic capacitor upon end termination, can increase efficiency of end termination, and is easy to operate.
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
A kind of preparation method of hydrolysis-resistant PBT polyester resin
Owner:DONGHUA UNIV
Chip positioning device and chip positioning method
ActiveCN105826092BOrientation is correctHigh end-capping efficiencyFixed capacitor dielectricStacked capacitorsCeramic capacitorEngineering
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
Intelligent end sealing clamp for high-precision electronic component and machining process of intelligent end sealing clamp
ActiveCN114850612AWide range of workImprove adaptabilityFinal product manufactureHeating appliancesEngineeringElectronic component
The invention discloses a high-precision electronic component intelligent end sealing clamp and a machining process thereof, and belongs to the field of electronic component machining. According to the intelligent end sealing clamp for the high-precision electronic component and the machining technology of the intelligent end sealing clamp, three-shaft end sealing plates are installed in the middle of the interior of a workbench frame and the middle of the interior of a lower fixing frame correspondingly, a through opening is formed in the middle of the interior of the workbench frame, and a positioning sensor is installed on the inner wall of the through opening; and feeding and discharging rolling wheels are installed in the grooves, and positioning clamp bases are installed on the two sides of the workbench frame correspondingly. The problems that in the prior art, an electronic component clamp is simple in positioning mode, the position of the clamp is not convenient to adjust intelligently, and adaptability is poor are solved, the position of a component can be sensed through the positioning sensor, the two three-shaft end sealing plates can be adjusted to achieve the optimal positioning effect, the positions of feeding and discharging rolling wheels are adjusted intelligently, and the production efficiency is improved. And the end sealing device is stable in structure and convenient to regulate and control.
Owner:东莞市东城金祥泰工业设计服务中心
A straw board production and processing system
ActiveCN106003280BEfficient deliveryQuality improvementLamination ancillary operationsLaminationMaterial removalInvestment material
A straw board production and processing system, including a main production system, a material recovery and dust removal system, the material recovery and dust removal system is installed at the upper end of the main production system; the main production system consists of a grass feeding module, a beam opening module, a step Inlet and separation module, straw conveying module, forming module, conveying module, cutting module and end-sealing module; the material recovery and dust removal system is composed of material recovery module and dust removal module; the grass feeding module, bundle opening module, The stepping separation module, the straw conveying module, the forming module, the conveying module, the cutting module and the end-sealing module are connected sequentially from left to right; the material recovery module is connected with the dust removal module. The straw board production and processing system of the present invention has the advantages of reasonable collocation of overall system equipment, good continuity, and high operating efficiency. In the production process, no auxiliary materials are added, and it is completely processed from straw, which can produce high-quality, high-strength boards. , Pure natural straw board.
Owner:高唐融知融智科技服务有限公司
Method for preparing alkyl end capping polyether using alkyl halide as end capping reagent
A method for preparing an alkyl-terminated polyether by reacting a polyether with a hydroxyl group in its molecular chain with an alkyl halide, comprising: 1) adding a solid base to the polyether for reaction, and the solid base is obtained from one of potassium hydroxide or sodium hydroxide species or a mixture thereof, the reaction temperature is 25-140°C, the equivalent ratio of polyether to potassium hydroxide or sodium hydroxide is 1:1.50-1.95, and calcium oxide powder, calcium oxide powder and potassium hydroxide are also added to the reaction system Or the feeding weight ratio of sodium hydroxide is 1: 1-6; 2) adding haloalkane to the reaction system to continue the reaction, the reaction temperature is 40-140°C, and the feeding equivalent ratio of raw material polyether and haloalkane is 1: 1.75-1.95; 3) The reactant is refined to obtain the product. In the present invention, since the water-absorbing agent calcium oxide is added to the reaction system, the reaction between water and the end-capping agent haloalkane is avoided to cause its decomposition. Its advantage is that it can reduce the usage amount of end-capping agent and improve the end-capping efficiency.
Owner:SINOPEC SHANGHAI PETROCHEMICAL CO LTD
High-stability water-soluble coenzyme Q10 inclusion compound and preparation method thereof
PendingCN111374965AImprove the stability of useWon't squeeze outCosmetic preparationsOrganic active ingredientsEnd-groupProcess engineering
The invention provides a high-stability water-soluble coenzyme Q10 inclusion compound. A preparation method comprises the following steps: heating a water-soluble coenzyme Q10 inclusion compound aqueous solution to 10-90 DEG C, adding a cross-linking agent, performing stirring reaction for 1-20 hours, and performing filtration and drying to obtain the high-stability water-soluble coenzyme Q10 inclusion compound. In the water-soluble coenzyme Q10 inclusion compound aqueous solution, an inclusion wall material of coenzyme Q10 is a starch wall material, and the content of water is 50-95% of the mass of the water-soluble coenzyme Q10 inclusion compound aqueous solution; and the addition amount of the cross-linking agent is 0.0005-0.02% of the mass of the water-soluble coenzyme Q10 inclusion compound aqueous solution. According to the invention, through an end group treatment mode of promoting cross-linking between hydrophilic end groups -OH outside the starch wall material through the cross-linking agent containing polyfunctional groups, an inlet port of the starch wall material is effectively terminated, the use stability of the water-soluble coenzyme Q10 inclusion compound is greatlyimproved, and the application field of the water-soluble coenzyme Q10 inclusion compound is further expanded.
Owner:上海融澈水性材料有限公司
Environment-friendly ether-containing elastomer and preparation method thereof
ActiveCN114349953ANarrow molecular weight distributionImprove reaction efficiencyChemical recyclingElastomerPolymer science
The invention relates to an ether-containing polymer and a preparation method thereof, and belongs to the field of polymer synthesis. The invention provides an environment-friendly ether-containing elastomer. The structural formula of the environment-friendly ether-containing elastomer is shown as a formula I. The environment-friendly ether-containing elastomer with a new structure is prepared; due to the introduction of the micro-channel reactor, the reaction efficiency is higher, the time is saved, and heat release and mass transfer of materials in the reaction process can be better controlled; the polymer with narrow molecular weight distribution can be prepared; meanwhile, by controlling the feeding amount and feeding speed of the ether-containing reaction solution and the dihalogenated monomer solution and the number of reaction modules of the micro-channel reactor, the reaction ratio and the molecular weight and molecular weight distribution of the ether-containing elastomer can be controlled.
Owner:SICHUAN UNIV
A kind of water-soluble polyester imide insulating paint and preparation method thereof
The invention discloses a water-soluble polyester imide insulating varnish, which comprises the following components in parts by weight: 145-200 parts of dibasic acid and / or dibasic acid anhydride, 7.5-16 parts of polybasic acid anhydride, dibasic alcohol 90 to 160 parts, 18 to 55 parts of polyols, 2 to 8 parts of diamines and 18 to 23 parts of glycidyl tertiary carbonic acid esters, the diols include hydrophilic functional diols, and the hydrophilic functional The dihydric alcohol is a dihydric alcohol containing a carboxyl group and / or a sulfonic acid group. The present invention introduces hydrophilic functional diols and polyols into the molecular chain of polyester imide, so that the molecular chain contains a certain amount of hydroxyl, carboxyl and / or sulfonate groups, thereby endowing the entire polyester imide The imine molecular chain is water-soluble and provides cross-linking points for intermolecular cross-linking reactions, thereby improving properties such as mechanical strength, heat resistance, water resistance, and storage stability. The invention also provides a preparation method of the water-soluble polyester-imide insulating varnish.
Owner:湖北长海新能源科技有限公司 +1
Chip positioning device and chip positioning method
ActiveCN105931836BOrientation is correctHigh end-capping efficiencyFixed capacitor dielectricStacked capacitorsCeramic capacitorElectrical and Electronics engineering
The invention discloses a chip positioning device and a chip positioning method. The chip positioning device is used for end packaging positioning of chips of an inversion-type multilayer ceramic capacitor. The chip positioning device comprises a first guide plate provided with a plurality of uniformly-arranged first through holes, wherein the length of each first through hole is matched with the width of each chip; a second guide plate provided with a plurality of uniformly-arranged second through holes, wherein the number and distribution positions of the second through holes are matched with those of the first through holes, the length of each second through hole is equal to that of each first through hole, and the width of each second through hole is matched with the thickness of the chip; and a positioning plate provided with a plurality of uniformly-arranged third through holes, wherein the number and distribution positions of the third through holes are matched with those of the second through holes, the length and width of each third through hole are equal to the length and width of each second through hole. The chip positioning device and the chip positioning method can ensure correct positioning orientation of the chips of the inversion-type multilayer ceramic capacitor during end packaging, can improve end packaging efficiency and is convenient to operate.
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
Preparation and application of a low-hardness and high-elasticity epoxy potting adhesive for water treatment membrane components
ActiveCN109082254BAvoid stress concentrationPrevent wire breakingEpoxy resin adhesivesEndcappingPolymer science
The invention discloses the preparation and application of epoxy potting adhesive for water treatment membrane components with low hardness and high elasticity. The epoxy potting glue includes A component and B component, and the A component includes 30-70 parts of epoxy resin; 5-20 parts of reactive diluent; 10-20 parts of toughening agent; 5-30 parts of filler; 0.1 to 3 parts of coupling agent; B component includes 20 to 50 parts of polyetheramine; 40 to 70 parts of alicyclic amine; 2 to 15 parts of curing accelerator; the weight ratio of the A component and the B component is 100 :10~100:50. The present invention realizes the characteristics of low hardness, high elasticity and stable hardness of the epoxy potting glue through the "trinity" toughening modification method of flexible toughening agent, active toughening diluent and flexible curing agent ; and while the epoxy potting glue has excellent bonding performance, it has low initial viscosity, fast mold filling speed, and easy operation, which can greatly improve the sealing efficiency of the membrane module, and is suitable for the packaging of water treatment membrane modules and the flexibility of electronic devices. Packaging and other fields.
Owner:浙江航通舟新材料科技股份有限公司
Method for preparing alkyl end capping polyether using alkylsulfate as end capping reagent
A method for preparing an alkyl-terminated polyether by reacting a polyether containing a hydroxyl group in the molecular chain with an alkyl sulfate ester, comprising: 1) adding solid potassium hydroxide or sodium hydroxide to the polyether for reaction, and the reaction temperature is 25-25 140°C, the equivalent ratio of polyether to potassium hydroxide or sodium hydroxide is 1:1.50-1.95, calcium oxide powder is also added to the reaction system, and the weight ratio of calcium oxide powder to potassium hydroxide or sodium hydroxide is 1 : 1 ~ 6; 2) Add alkyl sulfate ester to the reaction system to continue the reaction, the reaction temperature is 25 ~ 100 ° C, the equivalent ratio of raw material polyether and alkyl sulfate ester is 1: 1.75 ~ 2.00; 3) reactant Products obtained after refining. In the present invention, since the water-absorbing agent calcium oxide is added to the reaction system, the decomposition of the reaction between water and the alkyl sulfate of the end-capping agent is avoided. The advantage is that it can reduce the amount of end-capping agent used and improve the end-capping efficiency.
Owner:SINOPEC SHANGHAI PETROCHEMICAL CO LTD
A kind of dual-curable polysiloxane and its preparation method and use
ActiveCN112442177BAvoid generatingHigh end-capping efficiencyChemical industryCoatingsPolymer scienceEnd-group
The invention discloses a dual-curable polysiloxane and a preparation method and application thereof. The polysiloxane molecular structure contains acrylate groups, which can be quickly cross-linked and cured under ultraviolet light conditions, and the end group structure contains moisture curing groups, so the polymer has both moisture curing and UV light curing. Ability. The synthesis route provided by the invention can avoid the formation of acrylate, and the residual silanol is less than 1%, meanwhile, the energy required for light curing of the polymer is reduced, and the ability of the cured product to resist moisture and heat aging is improved.
Owner:WANHUA CHEM GRP CO LTD +1
Chip positioning device and method
ActiveCN105845465AOrientation is correctHigh end-capping efficiencyFixed capacitor dielectricStacked capacitorsEngineeringElectrical and Electronics engineering
The present invention discloses a chip positioning device and method. The chip positioning device used for blocking positioning of chips of an inverse multilayer ceramic capacitor comprises: a plurality of first guide plates of first through holes uniformly arranged, wherein the length of the first through hole matches the width of the chip; a plurality of second guide plates of second through holes uniformly arranged, wherein the number and the distribution positions of the second through holes match the first through hole, and the length of each second through hole is equal to the length of each first through hole; a plurality of fixed plates of third through holes uniformly arranged, wherein the number and the distribution positions of the third through holes match the number and the distribution positions of the second through holes, the length of each third through hole is equal to the length of each second through hole, and the width of each third through hole matches with the thickness of the chip. The chip positioning device and method are able to ensure the correct positioning orientation when the chips of the inverse multilayer ceramic capacitor are blocked, improve the blocking end efficiency and facilitate the operation.
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
Chip positioning device and chip positioning method
ActiveCN105845465BOrientation is correctHigh end-capping efficiencyFixed capacitor dielectricStacked capacitorsCeramic capacitorEngineering
The present invention discloses a chip positioning device and method. The chip positioning device used for blocking positioning of chips of an inverse multilayer ceramic capacitor comprises: a plurality of first guide plates of first through holes uniformly arranged, wherein the length of the first through hole matches the width of the chip; a plurality of second guide plates of second through holes uniformly arranged, wherein the number and the distribution positions of the second through holes match the first through hole, and the length of each second through hole is equal to the length of each first through hole; a plurality of fixed plates of third through holes uniformly arranged, wherein the number and the distribution positions of the third through holes match the number and the distribution positions of the second through holes, the length of each third through hole is equal to the length of each second through hole, and the width of each third through hole matches with the thickness of the chip. The chip positioning device and method are able to ensure the correct positioning orientation when the chips of the inverse multilayer ceramic capacitor are blocked, improve the blocking end efficiency and facilitate the operation.
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
Chip positioning device and chip positioning method
ActiveCN105826093BOrientation is correctHigh end-capping efficiencyEncapsulating capacitors apparatusTerminal applying apparatusCeramic capacitorEngineering
The invention discloses a chip positioning apparatus and a chip positioning method. The chip positioning apparatus comprises the following steps: a guide plate having a plurality of first through holes in uniform arrangement, the length and width of each first through hole matching the length and thickness of a chip; a positioning plate having a plurality of second through holes in uniform arrangement, the number and distribution position of the plurality of second through holes matching those of the plurality of first through holes, the width of each second through hole equal to that of each first through hole, the length of each second through hole greater than that of each first through hole, and the length of each second through hole greater than the sum of the length and the width of the chip, the depth of each second through hole no smaller than one third of the length of the chip and the depth of each second through hole no greater than half of the length of the chip; and a cross bar having a length greater than the width of the positioning plate. The chip positioning apparatus can guarantee correct orientation of the chip of an inverted multi-layer ceramic capacitor upon end termination, can increase efficiency of end termination, and is easy to operate.
Owner:GUANGDONG FENGHUA ADVANCED TECH HLDG
A kind of preparation method of alkoxy-terminated polydimethylsiloxane
ActiveCN113512197BHigh end-capping efficiencySimple production processPhosphoric Acid EstersPhosphate
The invention discloses a preparation method of alkoxy-terminated polydimethylsiloxane, which comprises the following steps: (1) after mixing DMC and hexamethyldisiloxane, the temperature is raised to 160-180° C., and dropwise adding Phosphoric acid, stirred for 6-8 hours, refluxed to remove water to obtain a silicophosphate terminator; (2) heating the linear body to 130-150 ° C, adding potassium hydroxide aqueous solution, stirring the polycondensation reaction, monitoring the viscosity online, before reaching the target viscosity Add the silicon phosphate terminator obtained in the step (1), continue to react for 5-50 minutes and then evacuated, and the low-boiling substances are removed by vacuum distillation to obtain α, ω-dihydroxy polydimethylsiloxane of different viscosity. The present invention adopts the preparation method of an alkoxy-terminated polydimethylsiloxane with the above structure, and the prepared alkoxy-terminated polydimethylsiloxane has high end-blocking efficiency, convenient production process and Better storage stability.
Owner:新纳奇材料科技江苏有限公司
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