baber/WOPTO huggingface dataset:
Patent KR-920009735-B1 (KR)
Title: Method for the preparation of a herpes simplex virus subunit vaccine
Inventor: KINO YOICHIRO
IPC: C12N7/04
Filed: 1985-08-22
Granted: 1992-10-22
Abstract: method for the preparation of an herpes simplex virus Subunit vaccine, which comprises subjecting a solution con- aining glycoproteins gA and gB to column chromatography ising, as a gel for chromatography, a sulfuric acid ester of cel- ulose or a crosslinked polysaccharide to adsorb the glycopro- eins gA and gB onto the gel in the presence of an anionic sur- actant or a nonanionic surfactant, eluting the adsorbed glycoproteins to obtain an eluate containing the glycoproteins, nd subjecting the eluate to gel filtration to obtain a filtrate ;ontaining the glycoproteins.
Patent KR-930001963-B1 (KR)
Inventor: PIERRE ANDRE
IPC: C03B18/16
Filed: 1985-09-25
Granted: 1993-03-20
Abstract: 내용 없음.
Patent KR-920010086-B1 (KR)
Title: Method of producing crystalline ammonium metatungstate
Inventor: KIM TAI K
IPC: C01G41/00
Filed: 1985-11-30
Granted: 1992-11-14
Abstract: A method is disclosed for producing crystalline ammonium metatungstate from ammonium paratungstate. The method involves heating the ammonium paratungstate at from about 100 DEG  C. to about 250 DEG  C. for from about 1 hour to about 8 hours to remove some ammonia and water, digesting a solution of the heated ammonium paratungstate in water at from about 80 DEG  C. to about 100 DEG  C. for from about 2 hours to about 6 hours at relatively constant volume while maintaining the pH of the slurry at from about 4.2 to about 3.0 by addition of ammonia as necessary to form a solution of ammonium metatungstate in water. The ammonium metatungstate solution is then evaporated to concentrate it. Any insoluble material is separated from the solution. Ammonium metatungstate is then crystallized from the resulting concentrated ammonium metatungstate solution.
Patent KR-940004366-B1 (KR)
Inventor: AU ANDREW N
IPC: H01C7/02
Filed: 1986-03-14
Granted: 1994-05-23
Abstract: 내용 없음.
Patent KR-910001114-B1 (KR)
Inventor: KANAMARU KOICHI
IPC: G06F12/12
Filed: 1986-05-21
Granted: 1991-02-23
Abstract: 내용 없음.
Patent KR-890001919-B1 (KR)
Title: A process for the carbonization by the dry distillation gas of a by-product in the tabaco manufacturing
Inventor: KIM HYONG-KUN
IPC: C10B47/00
Filed: 1986-06-20
Granted: 1989-05-31
Abstract: Carbonization of waste by-products from tabacco mafg. by dry distn. gas comprises (i) putting raw material into closed rotatory cylindrical furnace with a gradient of 3-15 deg. under 6-18 rpm, (ii) making reflux of distn. gas (generated from raw material itself) into combustion chamber for raising temp. to 450-500 deg.C after ignition, and (iii) carbonizing at 280-300 deg.C of furnace temp..
Patent KR-940008914-B1 (KR)
Inventor: MOSSE MADELEINE
IPC: A61K31/135
Filed: 1986-10-11
Granted: 1994-09-28
Abstract: 내용 없음.
Patent KR-900009169-B1 (KR)
Inventor: ISHII TAKAAKI
IPC: G10L15/22
Filed: 1986-11-26
Granted: 1990-12-24
Abstract: 내용 없음.
Patent KR-920007455-B1 (KR)
Inventor: ISHIHARA MASAHITO
IPC: B21K1/20
Filed: 1987-02-10
Granted: 1992-09-03
Abstract: 내용 없음.
Patent KR-910002512-B1 (KR)
Inventor: TAGADA MINORU
IPC: D04H1/4374
Filed: 1987-02-10
Granted: 1991-04-23
Abstract: 내용 없음.
Patent KR-930006601-B1 (KR)
Inventor: SATO YASUHIRO
IPC: B65G47/71
Filed: 1987-08-29
Granted: 1993-07-21
Abstract: 내용 없음.
Patent KR-950009881-B1 (KR)
Inventor: TOMINAGA KENJI
IPC: G21C15/18
Filed: 1987-09-18
Granted: 1995-09-01
Abstract: 내용 없음.
Patent KR-890004809-B1 (KR)
Title: Feed device of fabric in a quilting machine
Inventor: SADOU MASAO
IPC: D05B11/00
Filed: 1987-09-30
Granted: 1989-11-27
Abstract: An apparatus comprises a first roller for feedign cloth, drive means, a second roller for tensioning the cloth, and transmission means. The drive means rotate the first roller intermittently in a forward or reverse direction synchronously with the up-down motion of a upper sewing needle.  The second roller is disposed in parallel with the first roller.  The transmission means are disposed in a perpendicular direction to the first and second rollers for transmitting the driving force of the first roller to the second roller in order to operate them synchronously.
Patent KR-920003502-B1 (KR)
Inventor: HIRAEOKA SHINJI
IPC: G11B5/58
Filed: 1988-02-29
Granted: 1992-05-01
Abstract: 내용 없음.
Patent KR-910004457-B1 (KR)
Inventor: OSAGI TAKASI
IPC: D01F9/22
Filed: 1988-10-13
Granted: 1991-06-29
Abstract: 내용 없음.
Patent KR-920005634-B1 (KR)
Inventor: SAKAMODO GIICHI
IPC: G03F1/00
Filed: 1988-12-15
Granted: 1992-07-10
Abstract: 내용 없음.
Patent KR-0149636-B1 (KR)
Inventor: HISHIKI YUJI
IPC: H03F1/02
Filed: 1988-12-19
Granted: 1998-12-15
Abstract: 증폭기 회로는 오픈 드레인형 증폭 회로가 능동 부하를 가지고 있는 상이한 증폭 회로의 출력측에 제공될 수 있도록 배열되어 있다. 이 배열에서, 차동 증폭 유닛은 비동작 상태로 되고 동시에 상기 차동 증폭 유닛의 출력의 전위가 소정의 레벨로 확실히 설정된다. 따라서, 상기 오픈 드레인형 증폭 회로는 비동작 상태로 확실하게 유지된다.
Patent KR-930000140-B1 (KR)
Inventor: SAKAI ISAO
IPC: H01F1/08
Filed: 1989-01-19
Granted: 1993-01-09
Abstract: 내용 없음.
Patent KR-920008777-B1 (KR)
Inventor: SATOMI HITOSHI
IPC: D21D5/04
Filed: 1989-03-31
Granted: 1992-10-09
Abstract: 내용 없음.
Patent KR-920001416-B1 (KR)
Title: Maintenance system for switching center
Inventor: LIM IN-TAEK
IPC: H04M3/22
Filed: 1989-04-29
Granted: 1992-02-13
Abstract: inputting  a  key  from  a maintenance terminal to check it as  to  whether  the  key  is  an insertion command; shifting "1"  to  "0"  upon  finding  that  the command mode is "1" upon checking it; checking as to  whether  the inputted key is a command key, to carry out the relevant  routine; terminating the operation upon  finding  that  the  value  of  the current position and the value of the number of the inputted  keys are equal to each other; setting a variable n for  the  number  of the inputted keys, and  setting  a  variable  i  for  the  current position; and outputting backspace for n-1 times, and  terminating the operation after incrementing the value of the current position by "1".
Patent KR-910009260-B1 (KR)
Title: Working light control system
Inventor: LEE JIN-HWAN
IPC: G05B11/14
Filed: 1989-07-31
Granted: 1991-11-07
Abstract: In the construction machine having  a  working  light  and  a bucket, the system comprises: a switch  (1)  for  controlling  the light (b); ROM (2) memorized control program of the light (6); RAM (3) for memorizing data or lighting position  by  sensor  (8)  for sensing a lighting position and sensor (9) for sensing  a  working position; CPU (4) for carrying out the data  of  the  RAM  (3);  a light drive device (7) for controlling a lighting position of  the light (6).
Patent KR-960010778-B1 (KR)
Inventor: AOKI YOSHIHARU
IPC: B01D61/24
Filed: 1989-11-08
Granted: 1996-08-08
Abstract: 내용 없음.
Patent KR-930008918-B1 (KR)
Title: Dispenser container and process for manufacturing the same and apparatus therefor
Inventor: NAKAMURA KENJI
IPC: B65D83/08
Filed: 1989-11-09
Granted: 1993-09-17
Abstract: A dispenser-container comprises a container body provided with two containing spaces, containing wet contents (11) and dry contents (12), respectively. The container body is a bag constituted by a first flexible sheet (1) made of a liquid impervious material and a second flexible sheet (8) made of a liquid impervious material. The first sheet (1) constitutes a bag of a pillow type, longitudinal edges of the first sheet (1) overlap each other and are at most slightly sealed (14) with each other in such an extent that they can be manually separated to form an opening (20) for dispensing the dry contents. The second sheet (8) is fixed to the first sheet at entire peripheries (13) thereof and is located outside or inside the pillow type bag. The first sheet (1) or the second sheet (8) has an opening (2) or a weakened line for forming the opening (2), to permit dispensing of the wet contents (11), at a position forming a surface of the container body and being opposite to the overlapping longitudinal edges of the first sheet (1), and has a flexible flap (4) for resealably covering the opening (2) for dispensing the wet contents (11). The wet contents (11) is contained in one of the containing spaces, formed between the first sheet (1) and the second sheet (8) and provided with the resealable flap (4).
Patent KR-910007601-B1 (KR)
Title: Method of manufacturing highly shrikable elastic yarn
Inventor: LEE SANG-GWON
IPC: D02G3/32
Filed: 1989-12-11
Granted: 1991-09-28
Abstract: A high shrinkable  elastic  yarn  is  produced  by  cojugated melt- spinning polybutylene terephthalate  of  0.85-1.2  instrinsic viscosity and thermosetting polyurethane elastomer  to  obtain  an undrawn conjugated yarn, drawing the  conjugated  yarn  by  85-95% drawing magnification w.r.t. breaking  elongation  of  an  undrawn yarn, heat-treating it at 70-130 deg.C and  slack-treating  it  in the heat fluid nozzle of 90-160 deg.C. The elastic yarn is  useful for a panty stocking and a stretch wooven fabric.
Patent KR-0139904-B1 (KR)
Inventor: BOGAERIS JOHANNES LEONARDUS GI
IPC: G01B7/00
Filed: 1990-03-24
Granted: 1998-07-15
Abstract: 내용 없음
Patent KR-920008863-B1 (KR)
Title: Process for making corn-juice
Inventor: LEE JONG-SU
IPC: A23L2/38
Filed: 1990-04-16
Granted: 1992-10-10
Abstract: A corn juice is prepd. by (a) selecting corn and soaking  for 3 hrs. in water of 8 times the selected corn weight, (b) grind the soaked corn and filtering with 200 mesh  sieve,  (c)  heating  the filtered juice at 80 deg.C for 90 min. and cooling, (d) mixing the obtd. juice with 5 wt.% sugar and cooling  at  about  4  deg.C  to obtain the gel type corn juice, and (e)  re-mixing  the  gel  type corn juice with water, milk, food additives  etc.  to  obtain  the final product.
Patent KR-930001945-B1 (KR)
Title: Process for preparing particles of expandable polystyrene type resin
Inventor: LEE BYONG-UN
IPC: C08J9/16
Filed: 1990-04-30
Granted: 1993-03-20
Abstract: The  foaming  polystyrene  resin  particle  is  prepared  by polymerising   and   foaming   aromatic   vinyl   monomer   within polyolefinic resin in the presence of  catalyst  and  crosslinking agent, at the same time adding the  bubble  controlling  agent  of 0.01-0.2 wt. pts. w.r.t 100 wt. pts. of the  polyoleffinic  resin. Pref. the poly olefinic resin  is  polyethylene  or  polypropylene resin. Pref. the bubble controlling agent is one or mixt.  of  two selected    from    distearylthio    dipropionate,    dilaurylthio dipropionate,        2,2-methylene-bis-(4-methyl-6-t-butylphenol), triphenyl phosphate or N,N-di-2-butyl-p-phenylene diamine.
Patent KR-930010024-B1 (KR)
Inventor: OHMORI SHINICHI
IPC: H04N1/12
Filed: 1990-06-20
Granted: 1993-10-14
Abstract: 내용 없음.
Patent KR-930009099-B1 (KR)
Inventor: NAKAZAWA KIYOSHI
IPC: G02F1/1362
Filed: 1990-06-20
Granted: 1993-09-22
Abstract: 내용 없음.
Patent KR-950009450-B1 (KR)
Inventor: ASANO YOSHIKAZU
IPC: H04N7/00
Filed: 1990-10-17
Granted: 1995-08-22
Abstract: 내용 없음.
Patent KR-930003046-B1 (KR)
Title: Construction method of heat insulation wall
Inventor: PARK JU-DOL
IPC: E04B1/76
Filed: 1990-11-06
Granted: 1993-04-17
Abstract: cutting  a  styrene  foam panel into square unit bars (1) to be  coated  with  an  inorganic adhesive on the front and rear sides of the bar and  sprayed  with sands that firmly anchors in the adhesive layer; applying bond  to the concrete wall for  insulation  to  form  bond-applied  stripes laterally at a distance of 50-100 cm for  spacing  to  attach  the square unit bars; placing asbestos  panel  or  glass  fiber  sheet units having the same thickness as the unit bars for  filling  the space between the bars; applying an inorganic bond on the  exposed front surface of the attached styrene foam bars to attach asbestos cover sheets over the outer face of the wall for the competion  of insulation work.
Patent KR-920010288-B1 (KR)
Title: Process for the preparation of conjugated false twist yarn
Inventor: JO KU-HYON
IPC: D02G1/02
Filed: 1990-11-08
Granted: 1992-11-21
Abstract: Preparing method of composite false-twisted textured yarn  is characterized; differences of birefringence and elongation satisfy the equations of 25 x 10-3 <= Δn(C) - Δn (S) <=  52 x 10-3 and 150 % < enlongation (S) - enlogation (C)    350 % [C=  core  yarn;  S= sheath yarn;  n (C)= birefringence of C; Δn (S)= birefringence  of S . Temperature of first heater (2) of false-twist  apparatus  (1) is between Tg + 70 deg.C and Tg  +  150  deg.C.  Overfeed  is  fed before and after the interlacing  nozzle  (4)  during  interlacing undrawn yarns (C), (S), while satisfies the equation of 1.0%  <= overfeed ratio <= 8.0 %. The relation between monodenier  of  core yarn and that of sheath yarn satisfies the equations of 1.5 <= DE' (C) <= 5.0 and 0.4    <= DE' (S) <= 2.0 [DE= mono denier .  The  yarn made by this method features worsted-like  appearance,  voluminous feeling with excellent touch and deep-dyeability.
Patent KR-950008802-B1 (KR)
Inventor: SHIMOMURA TAIZO
IPC: B28D1/04
Filed: 1990-11-17
Granted: 1995-08-08
Abstract: 내용 없음.
Patent KR-930004100-B1 (KR)
Title: Method for embodying full duplex communication protocol
Inventor: PARK JAE-UN
IPC: H04L25/30
Filed: 1990-11-22
Granted: 1993-05-20
Abstract: The method for realizing  the  protocol  improving  the  data communication speed and quantity per unit  time  comprises  steps: (a) transmitting the first frame  composed  of  an  initial  frame number, a control code (ENQ), and a frame end code  (ETX)  at  the transmission part; (b) requesting  the  receiving  time  for  next frame at the reception part when receiving the  first  frame;  (c) transmitting the second frame in sequence of frame  number,  which and composed of a frame number, a data start code (STX), data  and frame end codes (ETX,EOT), and  retransmitting  the  corresponding frame  in  sequence  when  receiving  the  NAK  frame;   and   (d) transmitting the second  frame  having  a  last  frame  number,  a control code (ACK), and the EOT when receiving  the  second  frame having the EOT, or transmitting the second frame having an errored frame number, NAK, and the EOT when checking the errored frame.
Patent KR-930002034-B1 (KR)
Title: Power circuit
Inventor: PARK JANG-SU
IPC: H02H9/04
Filed: 1990-12-31
Granted: 1993-03-22
Abstract: An overvoltage/undervoltage detection circuit for  a  digital protective relay uses a microprocessor to drive a pre-alarm driver when the AC power supply is higher or  lower  than  the  reference voltage, and has a self-diagnostic section for the microprocessor. The circuit includes a power detector for detecting the  AC  input power, a rectifier, a sample-and-hold  section  for  sampling  and holding the DC voltage,  an  A/D  converter,  and  a  setting  key switching section. The microprocessor controls a whole  system  in accordance with the key signal  from  the  setting  key  switching section and the output of the A/D converter.
Patent KR-930008943-B1 (KR)
Title: Selected pulse occuranced circuit
Inventor: LEE DONG-HUN
IPC: H03K3/00
Filed: 1991-01-15
Granted: 1993-09-17
Abstract: The circuit selectively generates the pulse in the chip.  The circuit uses the timing signal selectively to  expand  the  output circuit by generating the pulse. The clock signal and the inverted clear signal (CLR) are connected to the flipflops  (FF4-FF0).  The output of the FF0 and the CLR signal are connected to the AND gate (G4) whose output is connected  to  the  input  of  the  FF4.  The selected signal and the output of the flipflop are combinated  and passed by the NAND gate. The clear signal (CLR) is  obtained  from the output of the NAND gate (G3). The output of the flipflop (FF5) is the desired pulse.
Patent KR-930006730-B1 (KR)
Title: Manufacturing method of capacitor of semiconductor memory device
Inventor: AN JI-HONG
IPC: H01L27/108
Filed: 1991-03-20
Granted: 1993-07-23
Abstract: The capacitor  of  a  high  integrated  semiconductor  memory device is mfd. by (a)  forming  a  first  polycrystalline  silicon layer, an oxide film and a second polycrystalline  silicon  layer, (b) partially etching the oxide film with  an  oxide  echant,  (c) wholly lifting off the second silicon layer,  and  then  partially lifting off the first silicon layer, (d) lifting off the  residual oxide film, and (e) defining the first silicon  layer  to  form  a storage electrode.
Patent KR-930009708-B1 (KR)
Title: Method for pulse detection of electric pressure meter
Inventor: PARK BYONG-UK
IPC: A61B5/025
Filed: 1991-04-06
Granted: 1993-10-09
Abstract: receiving current data, and if the current data is greater  than  previous  data,  deciding  a pulse wave  starting  point  according  to  the  previous   data; initializing a  maximum  pulse  wave  amplitude,  and  deciding  a current pulse wave amplitude by the difference between the current data and the pulse wave starting point data; if the current  pulse wave amplitude is greater than the maximum pulse  wave  amplitude, renewing the maximum pulse wave amplitude to perform the  step  of deciding the maximum pulse wave amplitude until a  timer  finishes counting, and  storing  the  maximum  pulse  wave  amplitude;  and returing to the first step after the  third  step  to  repeat  the above steps, to thereby prevent errors from occurring due to  wave distortion.
Patent KR-940002400-B1 (KR)
Title: Manufacturing method of semiconductor device with recess gate
Inventor: SHIN HYON-SUN
IPC: H01L29/78
Filed: 1991-05-15
Granted: 1994-03-24
Abstract: coating a nitride layer on a substrate, etching the nitride layer and substrate by a predetermined depth to form a trench, and ion-implanting an impurity for threshold or punch-through stop into the substrate; growing a gate oxide layer, and filling up the trench with polysilicon; removing the nitride layer and gate oxide layer placed thereon, oxidating the exposed portion of the polysilicon, ion-implanting an impurity on the substrate in a low concentration; forming an oxide layer sidewalls on the side of gate; and growing an epitaxial layer on the surface of the substrate exposed to form a source/drain area, thereby reducing an overlap capacitance.
Patent KR-940011883-B1 (KR)
Inventor: NAKANISHI YUTAKA
IPC: H04N5/225
Filed: 1991-06-25
Granted: 1994-12-27
Abstract: 내용 없음.
Patent KR-940001232-B1 (KR)
Title: MANUFACTURING METHOD OF HIGH ELECTRON INJECTION STRUCTURE AND VERTICAL FET USING PLANE DOPING OF GaAs ACCEPTOR
Inventor: WON YONG-HYOP
IPC: H01L21/335
Filed: 1991-06-25
Granted: 1994-02-17
Abstract: The device for minimising the source-channel current and maximising the electron injection energy has the n+-i-p+-n+ structure including the planar doped thin film acceptor layer. The high speed electron current is injected from the source to the channel. The high density doner impurity layer of the GaAs thin film is grown up between an undoped region and the channel to accelerate the channel injecting electron current and increase the potential energy. The whole structure is optimised for minimising the suppression of the injection energy and maximising the current density so that the initial speed of the electron is accelerated.
Patent KR-940007394-B1 (KR)
Title: Trench type eprom cell and faricating method thereof
Inventor: AN BYONG-JIN
IPC: H01L27/115
Filed: 1991-07-27
Granted: 1994-08-16
Abstract: The method for increasing the integration ratio of the elements comprises the steps of: a) forming an N- layer (2) with low density and N+ layer (3) with high density for common source on the bottom face of a P type substrate (1); b) forming an N+ region (7) with high density for drain and a P+ region (6) with high density on the upper face of the substrate; c) forming a buried oxide layer (8) on the N+ region for drain; d) forming a trench (9) and the first insulation layer (10) on it; and e) forming a floating gate (11A), the second insulation layer (12) and a control gate (13) on the first insulation and the buried oxide layers. The channel region is formed on the substrate by the voltage of the control gate.
Patent KR-940000889-B1 (KR)
Inventor: IRIKO MINORU
IPC: G11B21/02
Filed: 1991-08-06
Granted: 1994-02-03
Abstract: 내용 없음.
Patent KR-100235675-B1 (KR)
Inventor: MILLER WILLIAM J
IPC: G02B6/28
Filed: 1991-08-28
Granted: 1999-12-15
Abstract: 입력 광섬유에 수반된 입력광신호를 출력 광섬유에 선택적으로 이송시키는 장치, 3가지 굴절율을 가진 테이퍼드된 도파관 구조는 굽혀지고 상기 굽힘 상태에서 유지된다. 이러한 구조는 굽힘상태로 회전된다. 커플링 특성은 회전속도에 따라 조절된다.
Patent KR-940004496-B1 (KR)
Title: Tape overrun prevention apparatus for cassette tape recorder
Inventor: LEE HAE-SOK
IPC: G11B15/02
Filed: 1991-11-29
Granted: 1994-05-25
Abstract: The apparatus for preventing the tape overfeeding even when the motor is run for a moment after selecting each mode like a play, record, reverse, or stop mode includes an elastic lever (29) rotating elastically with an initial rotation force of a cam gear (2), a selection lever (24) selecting a mode selection switch, and a limit lever (31) linked to the elastic lever. The limit lever limits the rotation of the selection lever at each mode of the play, record, reverse play, or reverse record.
Patent KR-950002342-B1 (KR)
Inventor: STEWEN WILHELM
IPC: C10B39/02
Filed: 1992-01-09
Granted: 1995-03-16
Abstract: 내용 없음.
Patent KR-100229699-B1 (KR)
Title: Aquatic organism blocking material
Inventor: NAKANISHI MOTOYASU
IPC: C09D5/14
Filed: 1992-03-27
Granted: 1999-11-15
Abstract: An aquatic organism blocking material capable of preventing aquatic organisms from adhering to aquatic or fishing facilities or implements by a galvanic action. The material includes two or more kinds of substances (2,3; 2,4; 13,15; 13,16) capable of forming an electrode system in the presence of an electrolyte, and a water absorptive resin (5; 5; 17; 17) on which the substances are carried. The substances may be in the form of a combination of metals different in ionization tendency such as copper and silver or a combination of copper and carbon black. The material may take a form of powder or fibers. The water absorptive resin may be polyvinyl alcohol. <IMAGE>
Patent KR-940006550-B1 (KR)
Title: Double mode switch device of magnetic/recording/reproducing
Inventor: CHOE SONG-HUN
IPC: G11B15/665
Filed: 1992-06-17
Granted: 1994-07-22
Abstract: The double mode switch of a slide loading type camcorder has functions to detect mode and to eject the cassette holder. The double mode switch includes a detection gear (20) rotating on a substrate (10) by using a mode detection terminal (22), an ejector for ejecting a cassette holder according to an operating unit of the detection gear (20), and a mode detector for detecting contact state changed by a rotation of the detection gear (20) and operation of the ejector.
Patent KR-960011003-B1 (KR)
Inventor: SHIN MASAAKI
IPC: C08G18/08
Filed: 1992-06-18
Granted: 1996-08-16
Abstract: 내용 없음.
Patent KR-960012522-B1 (KR)
Title: Aromatic polyamide pulp and method thereof
Inventor: PARK YOUNG-HWAN
IPC: D21H13/26
Filed: 1992-09-01
Granted: 1996-09-20
Abstract: The process for the preparation of aromatic polyamide pulp comprising: a) preparing a polymerization solvent comprising an amide type organic solvent, an urea type organic solvent or a mixture thereof followed by obtaining an liquid crystalline prepolymer by dissolving an aromatic diamine in the polymerization solvent and adding an aromatic diacid chloride to the solution; (b) carrying out a preliminary gelation by free falling the liquid crystalline prepolymer into a rotary type vessel through an delivery opening; c) aging the gelated prepolymer in the vessel; (d) washing the obtained polymer with water or alkali solution and pulverizing. The aromatic polyamide pulp has homopolymer or copolymer type having a repeat unit shown in the following structure formula(I) or (II). In the formula, R1, R2 and R3 are aromatic group selected from the following structure formula(III). X is hydrogen, chloride, bromide, iodide, C1-C4 alkyl or alkoxy. Y is CH3CO, SO2, -O-, CH3CCH3.
Patent KR-960006056-B1 (KR)
Inventor: SADIKU SADIK
IPC: H02K15/04
Filed: 1992-09-09
Granted: 1996-05-08
Abstract: 내용 없음.