baber/WOPTO huggingface dataset:
Patent KR-20120072475-A (KR)
Title: Separating device and system using shape memory steel material sylinder and wire, method for setting the device, separating method using the device and reassemble method using the device
Inventor: LEE JUNG JU
IPC: F42B15/36
Filed: 2010-12-24
Abstract: PURPOSE: A low-shock and non-explosive release device using a shape memory alloy cylinder and a shape memory alloy wire, an installation method, a release system, a preparation method, a release method, and a re-assembling method thereof are provided to prevent pollution by reducing shock using a non-explosive method. CONSTITUTION: A low-shock and non-explosive release device comprises a shape memory alloy cylinder and a shape memory alloy wire(520). The shape memory alloy cylinder is composed of a shape memory alloy extended in an axial direction. The shape memory alloy wire is installed on a wire guide, and the ends of the shape memory alloy wire are fixed to outer holes. When the shape memory alloy wire is contracted, the shape memory alloy wire moves a trigger block(400) upward, and a center bolt(600) is stretched.
Patent KR-20120073438-A (KR)
Title: Method for manufacturing aramid fiber
Inventor: HAN IN SIK
IPC: D01F6/60
Filed: 2010-12-27
Abstract: PURPOSE: A method for fabricating aramid fibers is provided to ensure high tensile strength and to manufacture a bulletproof jacket, bulletproofing helmet, cable, and reinforcing material. CONSTITUTION: A method for fabricating aramid fibers comprises: a step of dissolving aromatic polyamide polymers in a solvent to prepare spinning dope; a step of spinning the spinning dope through a spinneret(10); and a step of solidifying the spinning dope through an air gap(20), a solidifying tank(30), and a solidifying tube(40) in order to prepare a filament(1). The solidifying tube has a nozzle(50) which is connected to the inside of the solidifying tube to spray a solidifying solution to the filament.
Patent KR-20120074869-A (KR)
Title: Synthetic natural gas production process enhanced reaction efficiency
Inventor: LIM HYO JUN
IPC: C10L3/08
Filed: 2010-12-28
Abstract: PURPOSE: A method for manufacturing synthetic natural gas(SNG) with the improved efficiency of reaction is provided to generate the reaction of carbon monoxide and carbon dioxide in hydrogen and synthetic gas by supplying synthetic gas from a gasifier to a methane synthesizing reactor through a separate desulfurizer. CONSTITUTION: A method for manufacturing SNG includes the following: a part of synthetic gas generated from the gasification of fuel is supplied to a methane synthesizing process using methane synthesizing reactors(13 to 15) through separate desulfurizing processes without a water gas shifting process; and a part of carbon dioxide from a carbon dioxide separating process is supplied to the methane synthesizing process. The synthetic gas includes 0.1 to 5 weight% of sulfur compound, 10 to 50 weight% of hydrogen, 30 to 80 weight% of carbon monoxide, and 1 to 30 weight% of carbon dioxide. The synthetic gas for the methane synthesizing process satisfies an equation, H_2/(3CO+4CO_2)=0.8-1.2.
Patent KR-20120077000-A (KR)
Title: Online application system, apparatus by use of extended fields and method thereof
Inventor: OH BYEONG TAEK
IPC: G06F15/16
Filed: 2010-12-30
Abstract: PURPOSE: An online application device and a method for offering an online application are provided to offer an individualized online application by establishing one application as a customized application at each tenant based on an extension field and meta data. CONSTITUTION: A rendering unit(212) requests UI(User Interface) data to a metadata manager(220) when a user terminal requests a web page URL(Uniform Resource Locator). The rendering unit changes a specific page of a specific tenant into code data in which an extension field for UI production is applied. The metadata manager requests UI data to database(224) and transfers the UI data to the rendering unit. A view solving unit(210) creates an actual web based UI code based on the code data and transfers the actual web based UI code to the rendering unit.
Patent KR-20120078351-A (KR)
Title: Optical device
Inventor: KIM HAG RYEOL
IPC: G11B17/056
Filed: 2010-12-31
Abstract: PURPOSE: An optical device is provided to integrate components and simplify processes, thereby conveniently managing quality. CONSTITUTION: An optical disc is placed in a tray body(510). A stator of a spindle motor is fixed to a bracket(630). A guide rod(310) guides linear movement of an optical pickup. An end of the guide rod is connected to the bracket. The stator and the guide rod are fixed to the bracket. The assembling tolerance of the optical pickup and the spindle motor is controlled.
Patent KR-20100043181-A (KR)
Title: Use of swellable polymer for sealing
Inventor: SCHMITT BARDO
IPC: C08F222/10
Filed: 2008-05-09
Abstract: The use of a swellable polymer for sealing, said polymer being obtainable by polymerizing a composition which comprises at least one polyalkylene glycol di(meth)acrylate having a weight-average molecular weight greater than 2500 g/mol.
Patent KR-20100057619-A (KR)
Title: Internal reforming solid oxide fuel cells
Inventor: FINNERTY CAINE
IPC: H01M8/04
Filed: 2008-07-18
Abstract: The present teachings relate to solid oxide fuel cells with internal reforming capability. The solid oxide fuel cell generally includes a cathode, an electrolyte, an anode, and a catalyst layer in contact with the anode. The catalyst layer can include a support membrane and a reforming catalyst layer associated with the support membrane. In some embodiments, the reforming catalyst can include one or more partial oxidation reforming catalysts. The present teachings also provide methods of making and operating the solid oxide fuel cells described above.
Patent KR-20100050552-A (KR)
Title: High solids epoxy coating composition
Inventor: NIXON STEVEN ALISTER
IPC: C09D163/02
Filed: 2008-08-07
Abstract: Coating composition comprising the reaction product of a tetra-alkoxyorthosilicate or a partially condensed oligomer thereof and an epoxy resin containing hydroxyl groups, said coating composition having a solids content of at least 70 vol% and/or a volatile organic content (VOC) not exceeding 250 g/l. This coating composition gives fast curing at ambient and sub-ambient temperatures and an extended pot life.
Patent KR-20100045519-A (KR)
Title: Lighting-resisting fastener
Inventor: KASHIWAGI MASAHIRO
IPC: B64D45/02
Filed: 2008-09-25
Abstract: Provided is a lighting-resisting fastener, which can prevent the peel-off of an insulator layer reliably while the airplane is flying, thereby to improve the thunderbolt preventing effect and the reliability. The lighting-resisting fastener (1) joints the shell plate (10) of the airplane and a structural member (11) positioned on the inner side of that shell plate (10). An insulator layer (5) is fused to cover one end face of a head (3), and is made to mesh mechanically with a fastener side engaging portion (or an engaging portion) (7) formed on that one end face.
Patent KR-20100088673-A (KR)
Inventor: OKUYAMA KENICHI
IPC: H01L21/027
Filed: 2008-11-05
Abstract: 본 발명은, 해상도를 저하시키지 않고도, 고감도로 형상이 양호한 패턴을 형성할 수 있는 네가티브형 레지스트 조성물, 및 당해 네가티브형 레지스트 조성물을 사용한 패턴 형성 방법을 제공하는 것을 목적으로 한다.  특정한 구조를 갖는 칼릭스 레조르신 아렌 유도체(A), 파장 248nm 이하인 활성 에너지선을 조사함으로써 직접 또는 간접적으로 산을 발생하는 산 발생제(B) 및 가교제(C)를 함유하는 것을 특징으로 하는 네가티브형 레지스트 조성물에 의해 상기 과제를 해결하였다.
Patent KR-20100085098-A (KR)
Title: Boomerang
Inventor: HO VINH HOANG
IPC: A63H27/127
Filed: 2008-10-09
Abstract: The invention relates to a boomerang that can automatically change both elevation angle α of blades and curve radius r of blades upon the change of rotary speed of blades (12), wherein blades (12) are made of elastically plastic film preferably selected from a group of polyvinyl chloride, polypropylene, polyethylene terephthalate, polystyrene and high impact polystyrene, the material has a specific weight of from about 0,9g/cmto about l,60g/cmand as thicknesses of from about 0,1mm to about 1mm; the ratio between rear groove deep and blade width is of from about 1/7 to about 6/7; the ratio between front groove deep and blade width is of from about 0 to about 3/7; the elevation angle α0 is of from about 10°to about 45° the initial curve radius rof the blades is longer or equal to 1/5 of the radius R of said ring (13); the ratio between the total area of said blades and the area of a circle defined by said ring (13) is of from about 12,5% to about 38%.
Patent KR-20100085979-A (KR)
Title: Photonic crystal security device and method
Inventor: WHITEMAN ROBERT
IPC: B42F15/00
Filed: 2008-10-14
Abstract: A method of forming an optically variable security device is provided. In the method, a photonic crystal material is provided and a process is performed upon the material which causes deformation of the material so as to form a first region for which incident light received by the crystal material is selectively reflected or transmitted to generate a first optically variable effect, and a second region for which incident light received generates an optical effect, different from the first optically variable effect. Corresponding devices having first and second regions are also disclosed.
Patent KR-20100083835-A (KR)
Title: Mobile display device
Inventor: HONDA NATSUHITO
IPC: H03M11/04
Filed: 2008-10-30
Abstract: It is possible to provide a mobile display device which can improve user-friendliness even when the character size is increased for improving visibility. A method for controlling the mobile display device is also disclosed. A control unit (18) can set a conversion candidate of an input character displayed on a second display region (conversion candidate character display region) of a display unit (16) to a first display mode (normal mode) for displaying the conversion candidate in a first character size and to a second display mode (enlarged mode) for displaying the conversion candidate in a second character size greater than the first character size while differentiating a display priority of a plurality of conversion candidates to be displayed in the second display region in the first display mode and a display priority of a plurality of conversion candidates to be displayed in the second display region in the second display mode.
Patent KR-20100086032-A (KR)
Title: Audio coding apparatus and method thereof
Inventor: LAAKSONEN LASSE
IPC: G10L19/02
Filed: 2007-11-06
Abstract: An encoder for encoding an audio signal. The encoder is configured to determine at least one characteristic of the audio signal; divide the audio signal into at least a low frequency portion and a high frequency portion, and generate from the high frequency portion a plurality of high frequency band signals dependent on the at least one characteristic of the audio signal. The encoder further determines for each of the plurality of high frequency band signals at least part of the low frequency portion which can represent the high frequency band signal.
Patent KR-20100117555-A (KR)
Inventor: GIEFER ANDREAS
IPC: B60T1/00
Filed: 2008-12-05
Abstract: 본 발명은 시프트-바이-와이어 변속기의 파킹 록을 수동 작동하기 위한 비상 언록킹 장치에 관한 것이다.  비상 언록킹 장치는 비상 언록킹 작동부와 변속기(1) 사이의 기계식 전달 장치(7)를 포함하고, 상기 전달 장치(7)는 변속기(1)의 변속 레버 샤프트(2)에 배치된 선회 레버 장치(3)와 맞물린다.  본 발명에 따라 비상 언록킹 장치는 선회 레버 장치(3)가 상기 전달 장치(7)와 연결된 1차 선회 레버(4), 상기 변속기와 연결된 2차 선회 레버(5), 및 상기 1차 선회 레버(4)와 상기 2차 선회 레버(5) 사이의 단방향 결합 부재(8)를 포함하는 것을 특징으로 한다.
Patent KR-20100106433-A (KR)
Inventor: MAKAGON PETR
IPC: H04L29/06
Filed: 2008-12-23
Abstract: 연합 네트워크에서 동작하도록 인증된 2개 이상의 엔티티들 사이의 신뢰를 발행하고, 입증하고 관리하기 위한 시스템은 하나 이상의 신뢰 메트릭들에 기초하여 신뢰 증명서들을 발행하기 위한 하나 이상의 서버들, 및 발행된 신뢰 증명서들을 입증하기 위한 하나 이상의 서버들을 포함한다. 통신 인터페이스를 통해 동작하는 엔티티들은 어떤 신뢰 메트릭들에 대한 평가에 따라 신뢰 증명서들이 발행될 수 있고, 증명서들은 엔티티들 사이의 통신들에 수반되고 증명서들은 상호작용의 통신 종점들에서 입증된다.
Patent KR-20100105644-A (KR)
Inventor: HOSODA TOMOYA
IPC: C08L67/00
Filed: 2008-12-02
Abstract: 본 발명은, 액정 폴리에스테르 및 고유전 재료 필러를 포함하는 수지 조성물을 제공한다. 또한, 본 발명은, 상기 액정 폴리에스테르 수지 조성물의 성형체를 제공한다. 본 발명의 액정 폴리에스테르 수지 조성물은, 방향족기로서 2,6-나프탈렌디일기를 40 몰% 이상 포함하고, 유동 개시 온도가 280℃ 이상이며, 유동 개시 온다보다 높은 온도에서 측정되는 용융 장력이 1 g 이상을 보이는 액정 폴리에스테르 50∼80 체적%와, 고유전 재료 필러 20∼50 체적%를 함유한다. 이 액정 폴리에스테르 수지 조성물은 스트랜드법 등에 의해 용이하고 또한 안정적으로 조성물 팰릿을 제조할 수 있으며, 이 액정 폴리에스테르 수지 조성물을 이용하여 이루어지는 성형체는 굽힘 강도, 유전 특성이 우수한 것으로 된다.
Patent KR-20100098460-A (KR)
Inventor: OTANI TAKU
IPC: A63F13/42
Filed: 2009-06-30
Abstract: 예를 들어, 게임 플레이 중에 있어서 플레이어의 스탠딩 위치의 벗어남에 대하여 대처를 꾀할 수 있는 게임 장치를 제공한다. 
가압 조작 접수 수단은, 플레이어의 가압 조작을 접수하여, 플레이어의 가압 위치에 관한 정보를 출력한다.     가압 위치 취득 수단 (61) 은, 가압 조작 접수 수단으로부터 출력되는 정보에 기초하여, 플레이어의 가압 위치를 취득한다.     판정 수단 (62) 은, 플레이어의 가압 위치가 판정 대상 영역 내에 포함되는지 여부를 판정한다.     게임 처리 실행 수단 (63) 은, 판정 수단 (62) 의 판정 결과에 기초하여 게임 처리를 실행한다.     판정 대상 영역 변경 수단 (64) 은, 플레이어의 가압 위치가 판정 대상 영역 내에 포함되지 않는다고 판정된 경우, 플레이어의 가압 위치에 기초하여, 판정 대상 영역의 위치를 변경한다.
Patent KR-20100102733-A (KR)
Title: Electronic ink processing
Inventor: DUNCAN RICHARD
IPC: G06F40/00
Filed: 2003-08-21
Abstract: An application programming interface instantiates an ink analyzer object that receives document data for a document containing electronic ink content from a software application hosting the document and running on a first processing thread. The ink analyzer object then employs the first thread to make a copy of the document data, provides the copy of the document data to an electronic ink analysis process, and returns control of the first processing thread to the analysis process. After the analysis process has analyzed the electronic ink, the ink analyzer object reconciles the results of the analysis process with current document data for the document.
Patent KR-20100134713-A (KR)
Inventor: OMEIS MARIANNE
IPC: B29C48/395
Filed: 2009-04-02
Abstract: 본 발명은 압출기에서 하기 화학식 (A1) 및/또는 (A2)의 구조에 따른 화합물 및 페놀계 수지를 기재로 하는 반응성 중합체를 연속적으로 제조하기 위한 방법, 및 상기 방법에 따라 제조되는 반응성 중합체, 그리고 복합 재료를 제조하기 위한 그의 용도에 관한 것이다. 
<화학식 A1> 
   
<화학식 A2>
Patent KR-20120082717-A (KR)
Title: Apparatus and method for muting of positioning reference signal in heterogeneous communication system, and positioning method and apparatus using the same
Inventor: YOON SUNG JUN
IPC: H04W64/00
Filed: 2011-01-14
Abstract: PURPOSE: An apparatus for muting a positioning reference signal in a heterogeneous communication system and a method thereof and a positioning method and an apparatus using the same are provided to accurately measure a terminal position by minimizing an interference effect between different types of base stations. CONSTITUTION: Muting information, which is used to confirm an PRS(Positioning Reference Signal) transmission resource region of a specific macro cell, receives from a specific macro cell or an upper end(S605). A non-macro cell confirms the PRS transmission resource region of a specific macro cell more than 1 among macro cells(S610). A PRS muting resource region is generated by muting a resource region corresponding to the PRS transmission resource region of the specific macro cell(S620). An OFDM signal is generated in consideration of the PRS muting resource region(S630). The generated OFDM signal is transmitted(S640).
Patent KR-20120035829-A (KR)
Title: Method for manufacturing via electrode
Inventor: KIM DONG PYO
IPC: H01L21/28
Filed: 2011-02-09
Abstract: PURPOSE: A via electrode manufacturing method is provided to increase production yield by preventing faults in a void or a core on a graphene layer within a via-hole. CONSTITUTION: A via-hole(102) is formed on a substrate. A catalyst layer(104) is formed on a sidewall and a floor of the via-hole. The catalyst layer is exposed to a solution in which graphene particles are mixed. A graphene layer is formed within the via-hole. An insulating film(103) is formed between the catalyst layer and the via-hole.
Patent KR-20120091696-A (KR)
Title: Gypsum based lightweight mortar composition
Inventor: NOH WOOK HWAN
IPC: C04B28/16
Filed: 2011-02-09
Abstract: PURPOSE: A gypsum based light weight mortar composition is provided to reduce construction material cost by including expanded polystyrene having a small apparent density. CONSTITUTION: A gypsum based light weight mortar composition comprises foam polystyrene. The gypsum based light weight mortar composition additionally includes cellulose ether. The viscosity of 2 weight% of aqueous solution of the cellulose ether is 1,000-200,000cps measured at 20 deg. Celsius and at 20 rpm when the viscosity is measured by using a Brookfield viscometer. The gypsum based light weight mortar composition comprises 20-90 parts by weight of gypsum, 0.1-3 parts by weight of foam polystyrene, 0-20 parts by weight of calcium hydroxide, 0-40 parts by weight of slaked lime stone, and 9-60 parts by weight of coarse dust limestone. The particle diameter of the gypsum is 0.5mm or less. The foam polystyrene has the apparent density of 2-20g/L and the particle diameter of 0.2-2.5 mm. The particle diameter of the calcium hydroxide is 0.5mm or less. The particle diameter of the slaked lime stone is 0.5mm or less. And the coarse dust limestone has a grain size of greater than 0.5mm and 1.5mm or less.
Patent KR-20120095065-A (KR)
Title: Method for interpreting in full duplex using word combination
Inventor: YOON HYUN SIK
IPC: G06F17/28
Filed: 2011-02-18
Abstract: PURPOSE: A two-way interpretation method using word combinations is provided to accurately transfer content transmitted to opponents in real time by inputting desired words or sentences. CONSTITUTION: A two-way interpretation apparatus receives a first word using a keypad according to the touch of a touch pen(S214). The two-way interpretation apparatus displays a word or a sentence similar with the first word using an interpretation function window(S216). When the word corresponding to the first word is selected by using the touch pen, a native language corresponding to the first word is displayed on a language display window and a foreign language is displayed on an opponent language display window(S220). When the user or the opponent language display window is touched, the native language or the foreign language for the selected first word is outputted using an output unit(S222).
Patent KR-20110099187-A (KR)
Inventor: SUZUKI MASAKAZU
IPC: H01R13/64
Filed: 2011-03-02
Abstract: 본 발명은, 단자 피팅이 소형화되더라도, 단자 피팅이 부정한 자세로 캐비티에 오삽입되는 것을 확실하게 방지하는 커넥터를 제공한다. 
본 발명의 커넥터는, 단자 피팅(30)의 대략 각통형의 본체부(31)에는, 그 외면으로부터 돌출된 형태의 볼록부(42)와, 본체부(31)의 외면을 움푹 들어가게 한 형태의 간섭 회피부(41)가 형성되고, 볼록부(42)와 간섭 회피부(41)는, 캐비티(12)에의 삽입 방향으로 투영한 가상 투영면 상에서 대략 대각선 상에서 대향하도록 배치되어 있다.  캐비티(12)의 내면에는, 캐비티(12)에 대한 단자 피팅(30)의 삽입 자세가 적정한 경우에만 볼록부(42)를 진입시키는 홈부(17)와, 간섭 회피부(41)와의 간극을 좁히도록 쌓아 올린 간섭부(24)가 형성되어 있다.
Patent KR-20110039222-A (KR)
Inventor: YUN KYONG SU
IPC: B01D39/14
Filed: 2011-03-02
Abstract: PURPOSE: A filter and a method for manufacturing the same are provided to reduce the number of manufacturing processes with respect to the filter by attaching filtering materials without adhesive. CONSTITUTION: A filter includes antistatic non-woven fabric(3) and non-woven mesh(2) on polyurethane foam. The antistatic non-woven fabric and the non-woven mesh are attached on the polyurethane foam using intermediate cured state of a non-foamed liquid resin(5). A non-foamed liquid resin is injected in the frame groove of a lower mold. The non-foamed liquid resin is remained for a pre-set of time and is intermediate cured. The non-woven mesh, the antistatic non-woven fabric, and the formed urethane foam are successively stacked in the lower mold. A pressurizing operation is implemented. An upper mold and the lower mold are combined. The non-foamed liquid resin is completely cured to complete a filter(1). The filter is demolded from the upper mold and the lower mold.
Patent KR-20120102431-A (KR)
Title: Pedal of bicycle
Inventor: CHOI EUI JIN
IPC: B62M3/08
Filed: 2011-03-08
Abstract: PURPOSE: A bicycle pedal is provided to enable stable and efficient pedaling to users because a top dead center of pedals is lowered when crank arms rotate. CONSTITUTION: A bicycle pedal comprises crank arms(570), auxiliary crank arms(600), and pedals. The crank arms are installed in both sides of a rotary shaft. The auxiliary crank arms are rotatably connected to the crank arms. The pedals are installed in the auxiliary crank arms. The crank arms and the auxiliary crank arms are connected by a connection shaft.
Patent KR-20120106263-A (KR)
Title: Display substrate, display apparatus having the same and method of manufacturing the same
Inventor: YUN SUNG SIK
IPC: G02F1/1335
Filed: 2011-03-18
Abstract: PURPOSE: A display substrate, a display device with the same, and a manufacturing method thereof are provided to obtain a uniform low reflective rate and reduce contamination due to harmful heavy metal. CONSTITUTION: A metallic light reflecting film(125) is formed on a high reflecting film. The metallic light reflecting film reflects light. A lower reflecting film(120b) is formed on the metallic light reflecting film. The low reflecting film includes a light absorbing layer and at least one dielectric layer. The light absorbing layer absorbs light.
Patent KR-20120107585-A (KR)
Title: Fluctuations restraint unit for succession joint position of lm rail
Inventor: PARK TAE GARB
IPC: H01L21/677
Filed: 2011-03-22
Abstract: PURPOSE: An apparatus for preventing shaking of an LM(linear motion) rail joint part is provided to extend the life of an LM rail by preventing shaking toward the joint part of an LM guide rail. CONSTITUTION: An LM rail(20) comprises an LM block(21) and a plurality of LM guide rails(22). An LM rail joint part shaking prevention apparatus(30) is installed on a lower part and a lateral side of a base frame(10). The LM rail joint part shaking prevention apparatus comprises an anchor plate(40), a pressure bearing part(50), and a tension supporting part(60). The top of the compressive support part supports the base frame. The tension supporting part comprises a side anchor plate(61), an elongated groove(62), and an anchoring bolt(63).
Patent KR-20120108284-A (KR)
Title: Bed of single type for semi-high cultivation
Inventor: LEE SAENG KYU
IPC: A01G9/10
Filed: 2011-03-23
Abstract: PURPOSE: An integrated type bed for the high bed cultivation is provided to enable users to easily work by increasing the height for cultivating crops, and to protect the crops from harmful insects. CONSTITUTION: An integrated type bed(1) for the high bed cultivation comprises the following: a supporting unit(12) increasing the location for cultivating crops; a space unit(2) having a box shape, installed on the upper side of the supporting unit; a reinforcing pipe supporter for inserting plural rib units; a nutrient solution discharge groove(4) installed on the bottom center of the space unit; nutrient solution storage grooves(6) formed on both sides of the space unit; a cover(15) with through-holes(H), covering the nutrient solution discharge groove; and plural inclined groves(5) connected to the nutrient solution discharge groove. The supporting unit includes a ventilation unit(3).
Patent KR-20120108730-A (KR)
Title: Composition of waterborne polyurethane, method of the composition and coating paint including the same
Inventor: YOO BYUNG WON
IPC: C08L75/04
Filed: 2011-03-25
Abstract: PURPOSE: A water-dispersible polyurethane composition is provided to improve mechanical properties like abrasion resistance, hardness, etc without using inorganic materials like clay, silica and alumina. CONSTITUTION: A manufacturing method of water-dispersible polyurethane composition comprises a step of manufacturing a prepolymer with a NCO group in terminal by reacting dimethylol propionic acid, an isocyanate-based compound and a catalyst to polyol; a step of manufacturing a prepolymer with an acrylate group in terminal by reacting pentaerythritol triacrylate to the reaction solution; a step of neutralizing a dimethylolpropionic acid-derived carboxy group originated from dimethylolpropionic acid by adding a neutralizer to the reaction solution of pH 7-10; and a step of manufacturing water-dispersible solution by mixing the reaction solution and water.