baber/WOPTO huggingface dataset:
Patent KR-840000793-B1 (KR)
Title: Process for preparing anthraquinone derivatives
Inventor: MURDOCK KEITH CHADWICK
IPC: C07C221/00
Filed: 1981-09-04
Granted: 1984-06-12
Abstract: The title compds. I (Z=H, CH; n=1-3; m=2 or 3) were prepd.  Thus, 12.5G 2(2-amino ethylamino)ethanol was refluxed with 9.7g(37.1%) formaldehyde and 150mL benzene to give 2-(1,3-oxazolidine-1-yl)ethyl amine, which was reacted with 40mL N,N,N',N'-teramethylethylene diamine and 10.97g leuco-1,4,5,8-tetrahydroxyanthraquinone at 50-55≰C for 5 hrs. with stirring.  The resulting ppt. was refluxed with 120mL N,N,N',N'-tetramethylethylene diamine for 12 hrs. to give 10g 1,4-bis [2-(1,3-oxazolidine-1-yl) ethylamino  -5,8- dihydroxyanthraquinone.
Patent KR-890000127-B1 (KR)
Inventor: DONFORTH CLAUDIA L
IPC: C23F11/00
Filed: 1982-01-09
Granted: 1989-03-08
Abstract: 내용 없음.
Patent KR-890002771-B1 (KR)
Title: Methods for mao inhibitors
Inventor: PALFREYMAN MICHAEL G
IPC: A61K31/195
Filed: 1982-05-31
Granted: 1989-07-28
Abstract: Inhibitors of monoamine oxidase were prepd.  Thus, 0.41g NaH in 40ml THF was treated with 5.55g ethyl 2,3-dibromo-3-(3'methoxyphenyl)-4- fluorobutyrate in 10ml THF, reluxed for 5 hr, and extd. with ether to give 3.85g ethyl 2-bromo-3-(3'-methoxyphenyl)4-fluoro-2-butenoate. The inhibitors are useful for treating mental sickness like depression.
Patent KR-880001719-B1 (KR)
Title: Process for preparing 1,4,9,10-tetra hydro pyrazolo(4,3-e)pyrido(3,2-b)(1,4)diazepino-10-ones
IPC: C07D471/14
Filed: 1982-06-03
Granted: 1988-09-08
Abstract: The title compds. [of formula (I), where R1 is H or C1-6 alkyl, R2 is C1-3 alkyl, R3 is H or C1-3 alkyl, R4 is H or C1-4 alkyl  are prepd. by ring closing rxn. of N-(2-halogen-3-pyridinyl)-4-amino-1H- pyrazole-5-carboxamide in an org. solvent at 80-200 deg.C.  Stir 4- amino-N-(2-chloro-3-pyridinyl)-1,3-dimethyl1H-pyrazole-5-carboxamide 25.7g (0.0966mol) and conc. sulfuric acid 0.5ml in sulforane 50ml for 2.5hrs at 130 deg.C, suck filter and wash cake with n-propanol after cooling slurry, stir with dil. ammonia and suck filter to give 1,3- dimethyl-title compd. 21.3g, yield 96%.
Patent KR-880000361-B1 (KR)
Title: Computer system
Inventor: CHIBA DAKASHI
IPC: G06F12/08
Filed: 1982-06-15
Granted: 1988-03-20
Abstract: Several processing units have buffer memories and an intermediate stores data in sets of data blocks contain at least two data block storage areas.  A main memory operatively connected to the intermediate buffer memory is divide into banks divided into data blocks which are the units accessed by the CPU's including two data bank and block storage areas when a needed data block is in the first data bank storage area.  An unneeded data block in one of the intermediate buffer block memory data block sterage areas is moved into that data bank storage area and the needed data block is moved the other way replacing the unneeded data block.
Patent KR-840000176-B1 (KR)
Title: Process for preparing cephalosporanic acid
Inventor: KAMIYA TAKASI
IPC: C07D501/59
Filed: 1982-06-22
Granted: 1984-02-27
Abstract: Bactericidal cephalosporins (Ih) [R1=A; R1a=H, (protected amino; R1b R1c independently=H, halo, lower alkoxy, arylthio; Z=N, CH; R2=H, lower alkoxy; R3=H, lower alkyl; R5=carboxy; R7=heterocyclic-thio; X=-C=N˜OH, lower alkylene; Y=H-R7  and their derivs. were prepd.  Thus, a mixt. contg. 2.10g 7-[2-(6-formamido pyridin-2-yl)-2-methoxy iminoacetamido -ce phalosporanic acid (syn-isomer), 2.70g desodium-2-(5-sulfido-lH-tetrazol-l-yl) acetate, and 40mL H2O was adjusted to ph 7, stirred at 60≰C for 6 hrs., and washed with eyhylacetate. Then, the resulting mixt. was adjusted to pH 2.5 with 10% HCl to give 1,27g syn-7-[2-6-formamidopyridin-2-yl)-2-methoxyiminoacatamido -3-(1-carboxy methyl ! -1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid.
Patent KR-910001494-B1 (KR)
Inventor: THBONE MASAHIRO
IPC: B29C48/10
Filed: 1983-01-14
Granted: 1991-03-09
Abstract: 내용 없음.
Patent KR-850000640-B1 (KR)
Title: The water meter of double case type with wings
Inventor: HAN UI-MUN
IPC: G01F1/05
Filed: 1983-06-24
Granted: 1985-05-06
Abstract: This invention relates to the water meter of the double case type with wings. A number of inflowing-inclined pipes(18) are installed between the internal case body(14) and the water chamber(12). The shape of wings(24) is formed with a curve and the shape of the influx hole(19) is smaller at the side of internal case body(14) than at the water chamber(12).
Patent KR-880001661-B1 (KR)
Title: Flux for preliminary treatment of melting iron
Inventor: HAN KI-CHOL
IPC: C21C7/04
Filed: 1984-07-20
Granted: 1988-09-05
Abstract: Flux, which simultaneously removes phosphorus, silicon, and sulphur, is NaCO3-CaCO3 system comprising 80-90 wt.% NaCO3, and 10-20 wt.% CaCO3.  The composition ratio of NaCO3 and CaCO3 become different in accordance with the relative volume of removing elements.
Patent KR-900007889-B1 (KR)
Inventor: KOBAYA OSAMU
IPC: G07D1/02
Filed: 1984-09-04
Granted: 1990-10-22
Abstract: 내용 없음.
Patent KR-870001084-B1 (KR)
Title: Process for the preparation of amino benzylamine
Inventor: YAMAGUCHI KEIZABURO
Filed: 1984-09-08
Granted: 1987-06-04
Abstract: Aminobenzylamine is produced from catalytic-redn. of nitrobenzaldoxime of formula (I).  In the formula (I), nitro gp. is attached to o-, m- or p- position in the presence of (a) boric acid, phosphoric acid(or its anhydrous) (b) gas and (c) org. acid i.e. aliphatic mono or di-carboxylic acid, aromatic carboxylic acid and sulfonic acid.  Catalytic-redn. is performed in alcohol, glycole, ether, hydrocarbons, ether and halohydrocarbon.
Patent KR-850000387-B1 (KR)
Title: Process for preparing 5-substituted oxazolidines-2,4-diones
Inventor: SCHNUR RODNEY CAUGHREN
IPC: C07C45/51
Filed: 1984-10-29
Granted: 1985-03-25
Abstract: 5-Substd. oxazolidine-2,4-diones of formula (I) or their pharmaceutically acceptable cationic salts are prepd. by substituting F of compds. of formula (II) with methoxide, ethoxide or methyl mercaptide, or substituting Br of compds. of formula (III) with cyanide. In the formulas, R1 is of formula (IV); Z3 is C1-2 alkoxy or methylthio; and Z4 is Cl or F. (I) are useful as antihyperglycaemic agents.
Patent KR-900008410-B1 (KR)
Inventor: DALQVIST INGEMAR ERIK
IPC: G06F7/499
Filed: 1984-10-30
Granted: 1990-11-20
Abstract: 내용 없음.
Patent KR-910004915-B1 (KR)
Inventor: JENSEN JENS K
IPC: F01D25/00
Filed: 1984-12-14
Granted: 1991-07-18
Abstract: 내용 없음.
Patent KR-890005334-B1 (KR)
Inventor: SCHEDEL JOHN W
IPC: F25B1/00
Filed: 1984-12-22
Granted: 1989-12-22
Abstract: 내용 없음.
Patent KR-870001598-B1 (KR)
Title: Beam controller of headlight
Inventor: PARK YON-JUN
IPC: B60Q1/00
Filed: 1985-03-19
Granted: 1987-09-10
Abstract: In night travelling, vision obstacle occurs to drivers of counter facing cars due to the illuminating beams of head lights. This device solves such obstacles by an optical appratus for controling radiation and the direction of beam.  The optical apparatus is a combinations of a convex lenz and a concave mirror and mirrors.  Light distribution is arranged to change with the centre line of convex lenz.  A lenz holder is used to control the position.
Patent KR-870001322-B1 (KR)
Title: Motor for gas valve
Inventor: LEE YONG-KU
IPC: F16K31/04
Filed: 1985-04-15
Granted: 1987-07-13
Abstract: An opeing and closing appratus for gas valves using forward/ reverse driving of Motor is presented.  And it is possible to remotelycontrol the valves with lines.  Its applications are diverse.  For example when external gas alarms signal it is possible to immediatly colse the valve by driving the motor.  Also it is appropriate to the swich valve with a large capacitor motor. The Blocks of the driver are composed of source circuits, an external isolation detector for leaked gas detection, a closing and opening control circuit breaker, Motor stop detection circuits and a Motor driver for forward and reverse driving.
Patent KR-900006266-B1 (KR)
Title: Pulse circuit
Inventor: NAKAYAMA MASAYAKI
IPC: H04N3/14
Filed: 1985-04-23
Granted: 1990-08-27
Abstract: The pulse generator circuit comprises a 1/2n+1 divider circuit (24) for dividing an input pulse into the pulse having 1/2n+1 frequency; a first shift register (25) for shifting the output signal of the divider circuit by n clock at a leading edge of the input pulse; a second shift register (26) for shifting the output signal of the first shift register by one clock of the input signal at a leading edge having a reverse polarity of the polarity of the first shift register; and a circuit (27) for obtaining a logical product of the output of the second shift register (26) and the output of the divider circuit (24).
Patent KR-920009213-B1 (KR)
Title: Weft feeder for weaving looms
Inventor: MAINA BRUNO
IPC: B65H51/22
Filed: 1985-06-04
Granted: 1992-10-15
Abstract: In a weft feeder for weaving looms, a rotating reel winds a reserve of weft yarn turns around a drum held stationary and means are provided to move forward said turns on the drum, keeping them mutally spaced. Said means comprise a set of columns, prevented from rotating in respect of said drum, but partially and variably emerging from special seats of its periphery, thanks to the motion imparted thereon by the feeder motor shaft, in respect of which they are rotatably mounted by way of a skew bushing and a rotary bearing. Said bushing is formed of two hollow bodies, the first of which is keyed to the motor shaft, eccentric in respect of the drum axis, while the second is rotatably mounted on the first, but apt to be locked thereto in two positions at 180° one in respect of the other and having the outer surface inclined in respect of said axis.
Patent KR-940009426-B1 (KR)
Inventor: SIMPSON SHARON M
IPC: G03C1/815
Filed: 1985-11-26
Granted: 1994-10-13
Abstract: 내용 없음.
Patent KR-900005349-B1 (KR)
Title: Method of and apparatus for checking geometry of multi-layer patterns for ic structures
Inventor: MAETA SUNJI
IPC: G06T7/00
Filed: 1985-12-24
Granted: 1990-07-27
Abstract: Each of the multi-layer patterns includes layer patterns arranged in different level layers where electrical image signals corresponding to any two of the multi-layer patterns and having more than two levels are registered with each other and then compared to determine unmatched and matched portions. The comparison of the registered electric image signals may be performed with respect to their amplitude or their gradients. The registration and comparison of two electric image signals may be repeated for all of the layer patterns with the matched portions being no longer subjected to the registration and comparison. A defect detection signal is produced from finally unmatched portions, if any, of the electric image signals having undergone the registration and comparison.
Patent KR-940000787-B1 (KR)
Inventor: DICKER IRA B
IPC: C08F4/42
Filed: 1986-02-28
Granted: 1994-01-31
Abstract: 내용 없음.
Patent KR-930007906-B1 (KR)
Inventor: LESPERANCE FRANCIS A
IPC: A61B17/30
Filed: 1986-06-05
Granted: 1993-08-21
Abstract: 내용 없음.
Patent KR-900002752-B1 (KR)
Title: Method for producing cement-additives
Inventor: LEE SEO-BONG
IPC: C09K3/18
Filed: 1986-06-11
Granted: 1990-04-28
Abstract: Cement additives are prepd. by mixing 10-90 wt.% gluconateamine salt [obtd. by reacting gluconic acid with amine of formula N-R1R2R3  or R1R2-N-R3-N-R4R5  and 90-10 wt.% alkali (earth) metal gluconate, and pref. air entraining agent of formula R-OCH2CH2n -OSO3-M+.  In the formulas, R1= R2= R3= R4= R5= aryl, naphthalene, C1-20 alkylamine or C1-20 carbonyl; R= C5-20 alkyl; M= Na (mono, di, tri) ethanolamine; n= 1-10.
Patent KR-900003702-B1 (KR)
Title: Full power hydraulic assistance device
Inventor: KERVACORET GILBERT
IPC: B60T11/16
Filed: 1986-06-21
Granted: 1990-05-30
Abstract: The hydraulic brake cirucit booster consists of a housing (10) with its inner chamber (12) containing a sliding piston (30,42) which is operated by the brake pedal so that it moves between two positions. In the first position it conncets a first chamber (38,56), which is linked to the brake circuit (60) to a low-pressure reservoir and isolates the chamber from the highpressure reservoir and isolates the chamber from the high-pressure fluid source (66). In the second position it isolates the chamber (38, 56) from the low-pressure source and links it to the high pressure source. In the event of a failure in the highpressure circuit, the piston is actuated by pressure in a second chamber (69) which is connected to the brake circuit.
Patent KR-930010463-B1 (KR)
Title: Spherical grains of polyamino acid and production method thereof
Inventor: HIRAYAMA TSUICHI
IPC: A61K8/00
Filed: 1986-06-27
Granted: 1993-10-25
Abstract: The present invention provides novel spherical grains of polyamino acid which can be used as a filler in chromatography, cosmetic powder and the like. The spherical grains can be produced by a method which comprises the steps of preparing a solution of hydrophobic polyamino acids, such as poly n-leucine, dissolved in an organic solvent; adding the solution to an aqueous medium and agitating said medium so as to obtain a dispersion of the spherical grains of the polyamino acid dispersed in the aqueous medium while evaporating the organic solvent; and isolating the spherical grains of the polyamino acid from the dispersion.
Patent KR-950008015-B1 (KR)
Inventor: IAN TREVOR BRISTOW
IPC: F04C2/344
Filed: 1986-07-22
Granted: 1995-07-24
Abstract: 내용 없음.
Patent KR-940001028-B1 (KR)
Inventor: IWASAKI SHIGEO
IPC: B30B1/23
Filed: 1986-08-04
Granted: 1994-02-08
Abstract: 내용 없음.
Patent KR-950001707-B1 (KR)
Inventor: ISHII SHIRO
IPC: C04B41/00
Filed: 1986-10-14
Granted: 1995-02-28
Abstract: 내용 없음.
Patent KR-900007473-B1 (KR)
Title: The method of manufacturing the magnetic head
Inventor: MIYAZAKI KATSUHIRO
IPC: G11B5/115
Filed: 1987-04-09
Granted: 1990-10-10
Abstract: The method comprises punching a sheet (1) for the shield plate into the prdetermined form to form a number of shield plates (1c); punching sheets (2,3) for the spacer opposed to the shield plates (1c) into the predetermined form to form a number of spacers (2a,3a); laminating the sheet (1) having the shield plates (1c) and the sheets (2,3) having the spacers (2a,3a); welding the shield plates (1c) to the spacers (2a,3a); and cutting the coupling elements of the welded sheld plates and spacers to form a bonded body.
Patent KR-950006460-B1 (KR)
Inventor: BLOMGREN JACK P
IPC: G02B6/38
Filed: 1987-04-30
Granted: 1995-06-15
Abstract: 내용 없음.
Patent KR-900004707-B1 (KR)
Title: Liquid crystal aligning agent
Inventor: KOTTO NORIAKKI
IPC: C09K19/56
Filed: 1987-06-17
Granted: 1990-07-02
Abstract: A liquid crystal aligning agent consists of a polyimide resin obtained by the polymerization of a diamin, a tetracarboxylic acid dianhydride, a monoamine of formula R2-(R1)nNH2. In the formula, R1 is aromatic or aliphatic gp. or deriv.; R2 is C6-20 alkyl; n is 0 or 1. The polyimide resin is obtained by polymerizing a mol of the diamine, b mol of the tetracarboxylic dianhydride and c mol of the monoamine in the relation to satisfy the following equations b>=a >=b/ 2, 2(b-a) >= c>= o.
Patent KR-920002127-B1 (KR)
Inventor: VEDRAS ANDRAS
IPC: C07D295/12
Filed: 1987-07-10
Granted: 1992-03-12
Abstract: 내용 없음.
Patent KR-900004657-B1 (KR)
Title: Method for producing door plate for refrigerator
Inventor: KOM HYUNG-GON
IPC: F25D23/02
Filed: 1987-09-25
Granted: 1990-07-02
Abstract: A steel plate for door of refrigerator is produced by: coating an adhesive (2) on fat-removed known steel plate (1); laminating a film of vinyl chloride resin film (3) on the adhesive (2); offset printing a glossy powder layer (4), on the vinyl chloride resin; and laminating a transparent film of ester resin (5) thereon. Pref. the thickness of the glossy powder layer is less than 10 micron.
Patent KR-910000248-B1 (KR)
Title: Process for the mutual condensation of aromatic and carbonylic compounds
Inventor: CLERICI MARIO G
IPC: C07C37/20
Filed: 1987-10-22
Granted: 1991-01-23
Abstract: The mutual condensation of aromatic and carbonylic compounds is carried out with zeolitic materials derived from silicalite by replacing a portion of silicon with B and Al, Al and Ti, Ti and Fe, and with ZSM-5, to yield diaryl-alkanes.
Patent KR-900006264-B1 (KR)
Title: Control method for television synchronizing signal detection
Inventor: CHOI DONG-JIN
IPC: H04N5/08
Filed: 1987-12-15
Granted: 1990-08-27
Abstract: When the television signal is tuned up, counters (3b,3g) of a microprocessor (3) are set to the initial value with a certain value and the synchronous signals provided from a synchronous separation circuit (2) is counted by a counter (3a) for a certain time. After subtracting "1" from the initial value and discriminating whether the subtracted value is zero, "1" is added to the counted value of the counter (3g) if the number of counted synchronous signal is within the preset range. If the added value the is not within the range or counted number of the counter (3b) is zero and the counted number of the counter (3g) is equal or greater than preset value (q), it is determined that the broadcast signal exists. Otherwise this procedure is repeated again until the synchronous signal is detected.
Patent KR-910003096-B1 (KR)
Inventor: PERLMAN WILLIAM
IPC: C09K8/72
Filed: 1986-08-13
Granted: 1991-05-18
Abstract: 내용 없음.
Patent KR-920003115-B1 (KR)
Title: An improved alkylation process utilizing enhanced boiling surface heat exchanger in the reaction zone
Inventor: ONEILL PETRICK S
IPC: C07B61/00
Filed: 1988-03-04
Granted: 1992-04-20
Abstract: A process of alkylating isoparaffinic hydrocarbons with olefinic hydrocarbons in the presence of an acid catalyst which comprises the steps of reacting isoparaffinic hydrocarbons and olefinic hydrocarbons in the presence of acid catalyst in a reaction zone (2) to form alkylate, withdrawing a mixture of hydrocarbons with acid catalyst as effluent from the reaction zone, separating the effluent into an acid phase and a hydrocarbon phase in a first separating zone (16), reducing the pressure on the hydrocarbon phase to refrigerate it and vapourize volatile hydrocarbons, passing the refrigerated hydrocarbon phase in indirect heat exchange with the reaction mixture of hydrocarbons and catalyst in the reaction zone to remove exothermic heat of reaction and vapourize further volatile hydrocarbons in the hydrocarbon phase, separating the liquid portion of the hydrocarbon phase from the vapour portion thereof in a second separating zone (25), fractionating the liquid portion of the hydrocarbon phase to remove alkylate, passing the vapour phase material removed in the second separating zone through a compressor (34) and a condenser (36) to compress and condense the vapour phase to form a liquid phase, reducing the pressure on the liquid phase to refrigerate it and vapourize volatile hydrocarbons forming an isoparaffinic hydrocarbon liquid phase and a volatile hydrocarbon vapour phase, separating the refrigerated isoparaffinic hydrocarbon liquid phase from the volatile hydrocarbon vapour phase in a third seaprating zone (39), and adding the separated refrigerated isoparaffinic hydrocarbon liquid phase as a reactant in the reaction zone, in which:   (a) the compressor (34) is operated at a suction pressure greater than atmospheric pressure, which suction pressure is equal to the pressure within the second and third separation zones; (b) the reaction within the reaction zone is carried out at a temperature less than 10 DEG C (50 DEG F); and (c) heat exchange apparatus is provided having a thermally conductive wall with an enhanced boiling surface on one side of such wall for carrying out the indirect heat exchange of the refrigerated hydrocarbon phase with the reaction mixture, wherein the refrigerated hydrocarbon phase is in contact with the said enhanced boiling surface during the indirect heat exchange. i
Patent KR-950009724-B1 (KR)
Inventor: BOTT JOHN A
IPC: B62D37/02
Filed: 1988-03-18
Granted: 1995-08-26
Abstract: 내용 없음.
Patent KR-970004621-B1 (KR)
Inventor: GERADUS CHRISTIAN MARIA GIELIS
IPC: H03H17/02
Filed: 1988-05-13
Granted: 1997-03-29
Abstract: 요약 없음
Patent KR-910002622-B1 (KR)
Title: Multifrequency transceiving and single tone detecting circuit
Inventor: KWON YONG-CHUL
IPC: H04M3/08
Filed: 1988-06-27
Granted: 1991-04-27
Abstract: The  circuit  is  for  detecting  and  processing  the  multi frequency reception/ trans mission and  the  single  tone  signals separately at each subscriber circuit as well as testing the voice path by inputing the said signals through the test terminal of the line. The circuit comprises an  interface  (100)  interfacing  the communication line of the  telephone,  a  low  pass  filter  (200) filtering the analog signal of the full duplexer,  a  codec  (300) encoding/decoding the communication signal, a single tone detector (400)   detecting   the   single   tone,   a   multi     frequency receiver/transmitter  (500)  allocated  to  each  subscriber,   an address decoding/time slot assigning  circuit  (600)  loading  the said signals to the assigned time  slot,  a  microprocessor  (700) controlling the circuit (600) with polling type, and  a  switching circuit (800) transmitting the tone signal to the line.
Patent KR-0136111-B1 (KR)
Inventor: CUTLER DAVID N
IPC: G06F15/177
Filed: 1988-07-01
Granted: 1998-06-15
Abstract: 내용없음
Patent KR-920006637-B1 (KR)
Title: Capstain controller of motor
Inventor: LEE SUN-KIL
IPC: G11B15/46
Filed: 1988-07-26
Granted: 1992-08-10
Abstract: The capstern controller is  for  inserting  capstern  into  a shaft of a capstern motor automatically. The  capstern  controller comprises a heater unit  for  heating  provided  capsterns  at  an appropriate temperature, a horizontal feeder for moving the heated capsterns through a slider  to  shaft  of  a  capstern  motor,  an inserting unit for inserting the capstern and for  depressing  the capstern downwards to  fasten,  a  drawer  for  drawing  back  the capstern motor coupled with the capstern, and a detecting unit for detecting the movement of the feeder and the inserting unit.
Patent KR-970011263-B1 (KR)
Inventor: FLUNNER JANET M
IPC: H01L21/60
Filed: 1988-08-25
Granted: 1997-07-08
Abstract: 요약없음
Patent KR-970000530-B1 (KR)
Inventor: YANAGIDA NOBORU
IPC: C07K14/125
Filed: 1988-09-16
Granted: 1997-01-13
Abstract: 내용 없음.
Patent KR-910006586-B1 (KR)
Title: Magnetic recording media
Inventor: ANN TAE-WAN
IPC: G11B5/702
Filed: 1988-12-22
Granted: 1991-08-28
Abstract: A magnetic recording medium is produced by mixing a  magnetic powder with 3,4,5-trihydroxy  benzonate  cpd.  of  formula  (I)[R= CnH2n+1; 8 <=n <=18 , dispersing the mixt. with a pigment  compsn.  to produce a magnetic layer soln, adding a  hardening  agent  to  the layer soln. to produce a magnetic pigment, and coating the pigment on the polyester base film. The cpd. (I) is pref.  octyl  gallate, lauryl gallate or cethyl gallate. The  recording  material  has  a good adesiveness and durability, and is used in magnetic tapes and magnetic disks.