baber/WOPTO huggingface dataset:
Patent KR-20020044591-A (KR)
IPC: A61P43/00
Filed: 2000-10-25
Abstract: 본 발명은 포스포디에스테라아제 Ⅶ 억제제로서 사용되는 화학식 Ⅰ의 화합물 및 이들의 생리학적으로 허용가능한 염 및/또는 용매화물, 및 약물 제조를 위한 이들의 용도에 관한 것이다: 
     [화학식 Ⅰ] 
     
       
     
     [식 중, R 1 은 CONR 4 R 5 를 나타내고, 
     R 2 는 H 또는 A를 나타내고, 
     R 3 은 Hal을 나타내고, 
     R 4 및 R 5 는, 서로 독립적으로, 각각 H 또는 A 1 을 나타내고, 
     Hal은 F, Cl, Br 또는 I를 나타내고, 
     A는 1-4 개의 탄소 원자를 갖는 알킬을 나타내고, 
     A 1 은 1-10 개의 탄소 원자를 갖는 알킬을 나타내고, 
     X는 1-4 개의 탄소 원자를 갖는 알킬렌을 나타내며, 이 중 에틸렌기는 이중 또는삼중 결합으로 또한 대체될 수 있다].
Patent KR-20030023606-A (KR)
IPC: E03D9/03
Filed: 2000-12-13
Abstract: 변기의 림에에서 액체를 분배하기 위한 액체 분배기로 제어된, 일정한 양의 액체가 매 플러시에 분배된다. 액체 분배기는 액체를 보유하기 위한 보틀, 상기 보틀을 보유하고 보틀과 분배판 사이에 액체 이송관을 제공하기 위한 베이스, 및 상기 베이스를 변기의 림에 매달기 위한 훅을 포함한다. 분배판은 수평으로부터 약 10 내지 약 30도의 각도로 아래쪽으로 경사져서, 베이스에 적산되거나 부착되어, 액체를 이송관으로부터 액체가 변기의 세정수에 의해서 접촉하게 되는 분배판의 상부면 위의 분배지점으로 분포하게 한다. 분배판은 액체의 분배판 상부면의 분배지점으로의 분포를 원조하는 다양한 형상을 갖는다. 바람직한 형태의 액체 분배기에서, 분배판은 이송관에서 분배지점까지 약 2000 내지 약 4000cP의 점성도를 갖는 액체를 분포시키기 위해서 상부면에 모세관을 갖고, 보틀이 제자리에 고정되도록 하는 다수의 맞물림 수단, 뿐만 아니라 장벽 수단 및 분배판의 표면에서의 액체의 유동을 제어하기 위한 개구부를 갖는다.
Patent KR-20020063215-A (KR)
IPC: A61K31/40
Filed: 2000-12-12
Abstract: 하기 화학식 (I)을 갖는 신규한 치환된 피롤이 개시된다. 
     [화학식 I] 
     
       
     
     상기 화합물 및 이들의 약제학적으로 허용가능한 염은 연속적인 수혈 용액으로서 환자에게 투여에 적합하고, 세포 증식 질환, 특히 암의 치료 및/또는 제어에 유용하다.     또한 이전의 화합물을 함유한 약제학적 조성물 및 암의 치료 및/또는 제어 방법이 개시된다.
Patent KR-20030004320-A (KR)
Title: Method for the removal of NOx and N2O from the residual gas in nitric acid production
IPC: B01D53/86
Filed: 2001-01-09
Abstract: Purifying residual gas from nitric acid production uses iron zeolite catalyst for decomposing dinitrogen monoxide after reduction of other nitrogen oxides to specified ratio. In a process for reducing the nitrogen oxide (NO x) and dinitrogen monoxide (N 2O) content of residual gas (I) from nitric acid production, (I) leaving the absorption tower, before entering the (I) turbine, passes through a combination of 2 stages, for reducing (1) the NO x and (2) the N 2O content. The NO x/N 2O ratio is 0.001-0.5 before the gas enters stage (2), in which (I) is contacted with a catalyst based on zeolite(s) charged with iron.
Patent KR-20020075785-A (KR)
Title: 2-stage cooling process for synthesis gas
IPC: F27D17/00
Filed: 2001-01-11
Abstract: The invention relates to a method for the disposal and the utilization of waste products of any kind. According to the inventive method, industrial, household and/or hazardous wastes that contain unsorted, untreated, harmful substances of any kind in solid and/or liquid form, as well as wracks of industrial commodities are subjected to a step-wise thermal treatment and thermal separation or physical transformation. The solid residues obtained by this method are liquefied at high temperatures. The inventive method is further characterized in that the discharged synthesis gas, once it has left the high-temperature reactor, is subjected to a shock treatment with water to cool off to 150  DEG C to 200  DEG C and then to a second shock treatment with water until it is cooled off to less than 90  DEG C. After the first step, the batch contained in the synthesis gas is transformed to hydrogen sulfide in the presence of water vapor and the hydrogen sulfide is then removed by means of iron chelate in a gas purification step.
Patent KR-20020093890-A (KR)
IPC: B60R21/231
Filed: 2001-04-06
Abstract: An inflatable element in the form of a tension tube, and method of making same. The method involves forming a tube by a knitting process, then heatsetting the tube whilst simultaneously maintaining it under lengthwise tension. The tension in the tube is maintained during cooling of the tube. An option relaxation stage may also be included.
Patent KR-20030001417-A (KR)
IPC: C09K3/00
Filed: 2001-04-12
Abstract: 본 발명은, 높은 제진 성능과 높은 차음 성능의 쌍방을 갖춘 차음 부재를 제공하는 것과, 그 부재를 구성하는 제진재 및 이것을 얻기 위한 수지 조성물을 제공하는 것을 목적으로 한다. 
     본 발명에 의한 제1 제진재용 수지 조성물은 염소 함유 열가소성 수지 100 중량부와 평균 탄소수가 12∼16인 염소화파라핀 20∼200 중량부를 함유한다. 염소 함유 열가소성 수지의 염소 함량은 바람직하게는 20∼70 중량%, 보다 바람직하게는 30∼70 중량%이며, 염소화파라핀의 염소화도는 바람직하게는 30∼70 중량%, 보다 바람직하게는 35∼65 중량%이다.
Patent KR-20020093945-A (KR)
Title: 힌지장치
IPC: F16C11/10
Filed: 2002-02-27
Abstract: 금속제의 회전부재(4)의 키홈(41)의 둘레방향의 양 끝단부에는, 수지제의 구동부재(도시하지 않음)의 접촉돌기(54, 54)를 삽입한다.  이 접촉돌기(54, 54)사이에, 수용통부의 키부(B3)를 삽입한다.  접촉돌기(54, 54)사이의 둘레방향에 있어서의 간격은 키부(B3)의 폭보다 약간 넓힌다.  이와 같이 함으로써, 송화부를 열림위치 또는 닫힘위치에 회전할 때에, 접촉돌기(54, 54)와 키부(B3)가 충돌하여, 클릭음이 발생한다.  더구나, 접촉돌기(54, 54)와 키부(B3)는 모두 수지로 이루어지기 때문에, 키부(B3)가 조기 에 마모하는 것을 방지할 수가 있다.
Patent KR-20030001487-A (KR)
IPC: C08L23/06
Filed: 2002-03-12
Abstract: 본 발명은 밀착성, 수납 상자로부터의 인출성, 내열성이 우수하며, 악취가 적고, 식품을 양호하게 포장할 수 있으며, 또한 생산 효율이 양호한 가교 적층 폴리에틸렌계 랩 필름을 제공한다.  이 필름은 선형 저밀도 폴리에틸렌 20 내지 90 중량％와 고압법 저밀도 폴리에틸렌 80 내지 10 중량％를 포함하는 양표면층, 고밀도 폴리에틸렌 50 내지 95 중량％와 고압법 저밀도 폴리에틸렌 50 내지 5 중량％를 포함하는 층을 1층 이상 구비한 중간층을 포함하며, 이들의 각층을 구성하는 2종의 폴리에틸렌의 합계 100 중량부에 대하여 글리세린 모노지방산 에스테르를 각각 0.050 내지 0.800 중량부 포함한다.
Patent KR-20030017999-A (KR)
IPC: A61J3/00
Filed: 2001-06-22
Abstract: 본 발명의 제약 제제(pharmaceutical dosages)를 보관/분배하기 위한 분배기는 스탬프-형 제형(stamp-like dosage form)으로 제공된다. 일부 실시예에서, 본 발명의 분배기는 개개의 "스탬프-형" 제약 제제(150)를 복수로 적층하여 보유하기 위한 하우징(202)을 포함한다. 상기 하우징(202) 내부에는 상기 하우징(202)의 제제 공급 포트(204)를 향해 상기 제제(150)를 가압하는 편향 요소(210)가 위치된다. 상기 제제 공급 포트(204)로부터, 상기 제제(150)는 구멍(214)을 통해 분배된다. 다른 실시예에서, 상기 분배기는 롤(600) 형태로 수집되는 스탬프-형 제형(150)을 갖는 제약 제제(150)를 보유하기 위한 원통형 본체(706)를 포함한다. 상기 원통형 본체(706)에 형성되는 제제 공급 포트(704)는 상기 본체로부터 한번에 하나씩 제제(150)를 수용한다.
Patent KR-20030043796-A (KR)
Title: Method and apparatus of producing a digital depiction of a signal
IPC: H03M1/12
Filed: 2001-06-20
Abstract: An apparatus for producing a digital depiction of a signal (10) which is adaptive to the signal itself. A constant rate sampling means, such as an analogue to digital converter (2), samples the signal (10) at a constant rate and produces a first digital depiction (12) of a signal. A transformation means (14) is responsive to the first digital depiction (12) and produces a second digital depiction based on the evolution of the signal. The transformation means may be capable of determining when a predetermined threshold level has been crossed and measuring the time interval between predetermined threshold level crossings. The transformation means (14) may include a logic arrangement and a timer counter and is run from a clock signal (16) from the same clock (6) as drives the sampling means. A method of adapting a conventional ADC (2) to adaptively sample the signal (10) by adding a transformation means (14) run off the same clock (6) as the ADC (2) is also provided.
Patent KR-20040063711-A (KR)
Title: Functional general medicine drink product
Inventor: SON YOUNG SUK
IPC: A61K36/00
Filed: 2003-01-08
Abstract: PURPOSE: Provided is a functional general medicine drink product which contains nutraceuticals, and controls the biological function in the aspects of biological defense, body rhythm control and preventive medicine. CONSTITUTION: The functional general medicine drink product with diet enzymes comprises herbal extracts and nutraceuticals obtained from ginsengs, mushrooms, plants, animals, algae and microorganisms. In order to make the functional general medicine drink product with the diet enzymes, a mixture of the herbal extracts and the nutraceuticals is saccharized, and fermented through various kinds of fermentations, such as acetic acid and lactic acid fermentations.
Patent KR-20040065734-A (KR)
Title: Structure for installation of a mosquito net on a vehicle
Inventor: JUNG TAE CHEON
IPC: B60J1/20
Filed: 2003-01-16
Abstract: PURPOSE: Structure of installing an insect net for a vehicle is provided to prevent insects from moving into the vehicle room by automatically deploying the insect net in opening the door glass, and to improve the appearance by restricting the direct contact of the passenger with installing the magnet inside the window frame. CONSTITUTION: An insect net installation system comprises an insect net(40); a winding roll(51) fixing the upper part of the insect net; hinge shafts(53a,53b) installed at both sides of the winding roll; a slot formed in the door trim(64) to input and output the insect net; a couple of hinge shaft support brackets(55a,55b) installed inside the door trim to rotate and support the hinge shafts; coil springs(57a,57b) supported to the hinge shaft support brackets and the winding roll; a steel bar(71) installed in the upper part of the insect net; a magnet mounted in the upper part of the window frame and attached or detached from the steel bar; and guide grooves formed at both sides of the window frame to guide both sides of the insect net.
Patent KR-20040065756-A (KR)
Title: Noise filter of high frequency generator
Inventor: YANG SEUNG CHEOL
IPC: H05B6/66
Filed: 2003-01-16
Abstract: PURPOSE: A noise filter of a high frequency generator is provided to attenuate a noise of 30MHz-1000MHz band leaked from the high frequency generator by adjusting a coil interval of a core type inductor. CONSTITUTION: A high frequency generator comprises a noise filter made of high frequency absorption material(202) and a choke coil(204). The choke includes a first coil part(204a) coiled with a first spacing, a second coil part(204b) coiled with a second spacing and a third coil part(204c) coiled with the first spacing. The high frequency absorption material is inserted into the coil and is formed by one among a ferric oxide, a Tin alloy, and a ferrite.
Patent KR-20040066422-A (KR)
Inventor: KIM PYUNG AM
IPC: B62K15/00
Filed: 2003-01-18
Abstract: PURPOSE: A roller board having a pedal is provided to reduce the weight and the size thereof and move the roller board with the minimum power. CONSTITUTION: A roller board having a pedal comprises a handle(1) connected with a front wheel(2) to rotate the front wheel; a board(3) connected to the handle with a hinge to make the handle folded, wherein a rear wheel is installed to the board to rotate; the pedal(5) installed to the board to rotate; a rear wheel gear connected to the rear wheel to rotate the rear wheel; and a gear box including an inner gear connected to the pedal to double the amount of rotation and to transmit the doubled amount of the rotation to the rear wheel.
Patent KR-20040067686-A (KR)
Inventor: CHOI MUN JEONG
IPC: H04N5/00
Filed: 2003-01-24
Abstract: PURPOSE: A system for processing a remote control service using a GUI(Graphic User Interface) in a home network environment is provided to offer a remote control service through a GUI in order to replace an integrated remote controller for the home appliances connected to a home network. CONSTITUTION: A remote controller proxy server(226-2), if remote controller service selection information at a service menu page having a list of available services is received from a PDP(Plasma Display Panel)(218), provides a remote controller service menu page. If a remote controller service setup menu is selected from the PDP(218), the remote controller proxy server(226-2) provides a remote controller control signal setup page. At this moment, the remote controller control signal setup page has a confirmation button to indicate the completion of remote controller setup. Afterwards, if a control signal based on the selection of a function is received through an input tool, the remote controller proxy server(226-2) makes related device and function information displayed. If information based on the user's selection for the confirmation button is received, the remote controller proxy server(226-2) constructs a DB based on a control signal selected through the input tool.
Patent KR-20030028778-A (KR)
Inventor: LEE SE WON
IPC: B60N2/22
Filed: 2003-01-29
Abstract: PURPOSE: A seat assembly having a support member is provided to stably support a driver from the sides in high-speed traveling or turning. CONSTITUTION: A seat assembly having a support member includes a seat body(30) having a built-in frame within; at least a pair of support members(41,42) rotatably installed on both outer sides of the seat body in the width direction of the seat body, to support a driver from the sides; and a driving unit operating the support member. A driving shaft is rotatably installed to the frame and both ends of the driving shaft are exposed to the outside of the seat body. Each support member is connected to each exposed end portion of the driving shaft. The driving unit has a driving device mounted to the frame of the seat body and a gear device connected to the driving device and the driving shaft, to transmit the driving force of the driving device to the driving shaft. Thus, the driver is effectively supported in high-speed traveling or sudden turning.
Patent KR-20040069687-A (KR)
Inventor: HAM HUI HYEOK
IPC: H04W4/24
Filed: 2003-01-30
Abstract: PURPOSE: A relocation processing method in a pre-paid phone service is provided to easily relocate a packet switching device while a GPRS(General Packet Radio Service) call is proceeding. CONSTITUTION: When a GPRS call is proceeding(S100), a mobile terminal transfers a relocation message to an O-SGSN(Old SGSN)(S110). The O-SGSN transfers a relocation request message to an N-SGSN(New SGSN)(S130). The O-SGSN transfers a GPRS event report message to an SCP(S140) and a GPRS apply charging report message to the SCP(S150). The O-SGSN transfers a relocation command to the mobile terminal to continuously perform the relocation procedure(S160). The mobile terminal transfers a relocation detect message to the N-SGSN(S170). The N-SGSN transfers a PDP update request message to a GGSN(S180). The GGSN transfers a response message to the N-SGSN(S190). The mobile terminal transfers the relocation complete message to the N-SGSN(S200). The N-SGSN transfers a relocation complete message to the O-SGSN(S210). The O-SGSN transfers a corresponding response to the N-SGSN(S220).
Patent KR-20040070738-A (KR)
Inventor: SEO YEONG HUN
IPC: H01L21/336
Filed: 2003-02-04
Abstract: PURPOSE: A method for forming a gate profile in fabricating a semiconductor device is provided to improve reduced repeatability and reliability caused by ununiformity of a notch by forming a gate profile in a way that a notch is not generated when a gate CD(critical dimension) is decreased. CONSTITUTION: A gate oxide is deposited. Polysilicon for forming a gate is deposited on the gate oxide. By using an end pointer, the polysilicon is etched until the gate oxide is exposed. Residual polysilicon is eliminated to form a gate profile.
Patent KR-20040071809-A (KR)
Inventor: CHO JAE HYEONG
IPC: B02C23/00
Filed: 2003-02-07
Abstract: PURPOSE: An apparatus for removing and washing foreign materials from recycled aggregates using construction wastes is provided to easily remove foreign materials form waste concrete or recycled aggregates crushed into a size less than 40mm. CONSTITUTION: The apparatus comprises: a main body(10) having an outlet(12) formed on the lower end; a dispersion device(16) for uniform dispersion input when supplying crushed materials of or recycled aggregates of construction waste to the main body(10) by a feed conveyer(60); a double blade(11); a first motor(15) driven in connection with a reducer(14) reducing the speed of a pair of gears(13); a plurality of air nozzles(21); an air supply tube(20); a solenoid valve; a blower; a check valve(24); a first vibrating dewatering screen(50); a control ware(32); a scrapper(30); a second vibrating dewatering screen(51); a refill water supply tube(40).
Patent KR-20040071945-A (KR)
Inventor: JUNG SEOK HWA
IPC: H04N5/445
Filed: 2003-02-07
Abstract: PURPOSE: An image display device capable of adjusting a sub-picture and a method therefor are provided to independently adjust the sub-picture using an OSD(On Screen Display) picture. CONSTITUTION: A key input unit(170) has a menu selection key and a vertical and horizontal adjustment button for adjusting the level of a selected menu. A main-picture image signal processing unit(110) processes a main-picture image signal inputted from the outside as a type capable of being outputted to a display unit, and outputs the processed main-picture image signal. A sub-picture image signal processing unit(130) processes a sub-picture image signal as a type capable of being outputted to the display unit. A micro-controller(150) controls the operation of respective composing elements of an image display device. A PIP(Picture In Picture) processing unit(140) overlaps the main-picture image signal outputted from the main-picture image signal processing unit(110) with a sub-picture image signal outputted from a memory unit(190), and outputs the overlapped image signal. An OSD output unit(160) outputs an OSD menu picture to the image signal outputted from the PIP processing unit(140) by the control of the micro-controller(150). The micro-controller(150) outputs an OSD adjustment menu to the OSD output unit(160) for adjusting a sub-picture as an OSD type.
Patent KR-20040072320-A (KR)
Title: Motor with integrated magnetic bearing
Inventor: HAN U SEOP
IPC: H02K7/09
Filed: 2003-02-12
Abstract: PURPOSE: A motor with integrated magnetic bearing is provided to achieve a small size stator and make a magnetic force in a shaft direction constant. CONSTITUTION: A motor(100) with integrated magnetic bearing comprises at least one or more stator disk(140) and at least two or more rotor disks(130). The stator disk is fixed to a housing(100) of the motor and arranged vertically to the rotating shaft(120). The rotor disks are fixed to the rotating shaft and arranged at both sides of the each stator disk by corresponding to the stator disk. The stator disk is formed with two overlapping disks. Poles of coil formed on the stator disk is arranged alternatively.
Patent KR-20040074547-A (KR)
Inventor: PARK JEONG HWA
IPC: F24F11/76
Filed: 2003-02-19
Abstract: PURPOSE: A vane control method of an air conditioner is provided to prevent cold or hot wind out of a proper temperature condition from directly blowing out toward users by closing the vane at the proper temperature condition and discharging the heat-exchanged air into the room by opening the vane again if out of the temperature condition. CONSTITUTION: In an air conditioner having a vane for regulating the air flow upward and downward to a discharge port of a body and a louver installed to the side of the body to regulate the air flow left and right, a vane control method of the air conditioner is composed of steps for setting a reference room temperature range for controlling the air-flow up and down control vane and the louver; opening the vane and the louver and measuring the room temperature during heat-exchanging with the indoor air; and comparing the measured present room temperature with the pre-set reference room temperature range and controlling the discharge port of the body(380). If the present room temperature is out of the reference room temperature range, the vane is closed.
Patent KR-20040075121-A (KR)
Title: Cross typed induction plasma generator with large area
Inventor: WI SOON IM
IPC: H05H1/24
Filed: 2003-02-20
Abstract: PURPOSE: A cross typed induction plasma generator with large area is provided to increase plasma density due to mutual-collision of plasma ion by making a cross shape discharge tube for plasma generation. CONSTITUTION: According to the plasma generation apparatus generating plasma by applying supply power to an inner wall of a discharge tube(40) and supplying plasma, the discharge tube is constituted in a cross shape whose inside is penetrated, and a ring type ferrite core(80) is installed in each branch part of the cross shape discharge tube. A coil(51,51') is wound around the ring type core. An extended horn(47) whose diameter is increasing is formed at an output part of the cross shape discharge tube.
Patent KR-20040076413-A (KR)
Inventor: LEE JU YEONG
IPC: G09G3/36
Filed: 2003-02-25
Abstract: PURPOSE: A liquid crystal display panel and a method for driving the same are provided to prevent the afterimage by not causing the direct voltage(DE) since the large difference value between the charged pixel data is compensated by the difference valued between the opposite polarity charged pixel data at the following odd field and the even fields. CONSTITUTION: A liquid crystal display panel includes a liquid crystal panel(2), a gate driver(4) and a data driver(6). The liquid crystal panel(2) is provided with a liquid crystal cell matrix. The gate driver(4) supplies the scan signals to the gate lines of the liquid crystal cell matrix. And, the data driver(6) inverts the polarity of the inputted pixel data by at least two field units and supplies the inverted inputted pixel data to the data lines of the liquid crystal cell matrix.
Patent KR-20040078436-A (KR)
Inventor: CHOI SEONG CHEON
IPC: H01J11/24
Filed: 2003-03-04
Abstract: PURPOSE: A plasma display panel and a method for driving the same are provided to expand the positive column by generating the discharge between the scan electrode and the address electrode, thereby increasing the efficiency of the discharge. CONSTITUTION: A plasma display panel includes a scan electrode(Y), a sustain electrodes(Z) and an address electrode. The scan electrode(Y) and the sustain electrode(Z) are formed on the upper substrate in parallel. The address electrode is formed on the lower substrate in a direction crossing with the scan electrode(Y) and the sustain electrode(Z). And, the plasma display panel is characterized in that the distance between the scan electrode(Y) and the sustain electrode(Z) is set wider than the distance between the scan electrode(Y) and the address electrode.
Patent KR-20040079044-A (KR)
Inventor: PARK GONG SU
IPC: H01R13/717
Filed: 2003-03-06
Abstract: PURPOSE: A temperature variation sensor of an outlet and a power plug are provided to sense a temperature variation caused by current measurement of a plug and an outlet to indicate a temperature increase due to overload. CONSTITUTION: A temperature variation sensor of an outlet(10) and a power plug(12) includes a temperature variation sensing unit(14). The temperature variation sensing unit includes a plug(20) for being inserted into the outlet, a plug socket(22) connected to the plug through a wire and inserts the plug into the outlet, and an amperemeter connected to the wire to measure a current value. The temperature variation sensing unit further includes a controller, a lamp, and a buzzer. The controller receives the current value measured by the amperemeter, compares a temperature value corresponding to the current value with a predetermined reference temperature to drive a lamp driving signal such that the color of the lamp is varied with the temperature value, generates an alarm sound when the temperature value exceeds the reference temperature. The buzzer generates the alarm sound under the control of the controller.
Patent KR-20040079170-A (KR)
Inventor: CHO JEONG IN
IPC: C08L63/04
Filed: 2003-03-06
Abstract: PURPOSE: An epoxy resin composition for semiconductor device package and its preparation method are provided, to improve dispersion, thereby preventing the flocculation or coagulation of a colorant and silica and reducing short inferiority. CONSTITUTION: The epoxy resin composition comprises 3-20 wt% of at least one epoxy resin having at least two epoxy groups in a molecule selected from the group consisting of bisphenol A-type, alicyclic, linear aliphatic, cresol novolac-type, biphenyl-type and fluorinated epoxy resins, and epoxy resins of a hetero ring having at least one halogen, nitrogen, oxygen or sulfur atom as a ring member; 3-20 wt% of at least one curing agent having at least two kinds of OH groups in a molecule selected from the group consisting of a phenol novolac resin, a resol-type phenol resin, a cresol novolac resin, a phenyl alkyl resin, a bisphenol A novolac resin, a nonyl phenol resin, a t-butyl phenol novolac resin and a dicyclopentadiene phenol resin; 60-90 wt% of a silica powder; and 0.05-5 wt% of at least one colorant selected from the group consisting of carbon black and titanium black.