baber/WOPTO huggingface dataset:
Patent JP-S5285791-A (JP)
Title: Billet chipper
Inventor: WATANABE TADAYUKI
IPC: B23C3/14
Filed: 1976-01-07
Abstract: PURPOSE: To improve the deflawing operation for billets by preventing them from being bent or vibrated under the loads exerted by rotary cutting heads. 
     COPYRIGHT: (C)1977,JPO&Japio
Patent JP-S5592314-A (JP)
Title: Adhesive fomentation
Inventor: HORIUCHI TETSUO
IPC: A61K9/70
Filed: 1979-01-06
Abstract: PURPOSE: An adhesive fomentation having improved adhesion to the skin, stability, and shape retention, capable of giving moderate cold feeling to the affected part, comprising a hydrous gel having the elasticity wherein a specific amount of water is dispersed in the oily continuous phase in the form of particles.  
     CONSTITUTION: A fomentation comprising (A) a hydrous gel, wherein water droplets are emulsified and dispersed in the continuous oily phase consisting of a teleblock copolymer elastomer of the A-B-A type and an oil component with an emulsifier, as a base and (B) an active constituent, e.g. external analgesic and anti- inflammatory agent, and (C) a tackifier constituents. The amount of the water droplets is preferably 5W70wt%. The droplets enclosed in the gel will neither volatilize nor harden the base, nor deteriorate the adhesion to the skin. The softness and tackiness of the continuous phase eliminate the necessity of fixing means such as adhesive plasters. 
     COPYRIGHT: (C)1980,JPO&Japio
Patent JP-S5698445-A (JP)
Title: Aluminum type alloy bearing
Inventor: KAMIYA SOUJI
IPC: C22C21/00
Filed: 1980-01-10
Abstract: PURPOSE: To provide the aluminum type alloy bearing more excellent than a conventional alloy bearing in high temp. hardness, fatigue resistant strength, abrasion resistance and burning resistance containing Sn, Zn and Cr in a predetermined ratio respectively and comprising the remainder of Al.  
     CONSTITUTION: The Al type alloy bearing contains, in the wt% basis, 2.5W25% of Sn, 0.5W8% of Zn and 0.1% or less of Cr and consists of the remainder of Al substantially. This Al type alloy is subjected to cold rolling and annealing according to a conventional method and thereafter, pressed to a lining steel plate to be used as the bearing directly contacted with a shaft. Further, a rolling deduction of the cold rolling is adjusted to a range of 5W50% in one rolling and the annealing is carried out at 270W350°C after cold rolling in order to remove pressure stress. In this Al type alloy, Cr is dispersed in a matrix as an etremely fine hard Al-Cr intermetallic compound and growth of an Sn particle is prevented and other various effects are exhibited. 
     COPYRIGHT: (C)1981,JPO&Japio
Patent JP-S5494325-A (JP)
Title: Lighting device
Inventor: KUROKAWA TAKASHI
IPC: H04N1/04
Filed: 1978-01-10
Abstract: PURPOSE: To introduce the projected light wave from the light source efficiently to a read station and render the intensity of illumination at the read station high and uniform by interposing the light introducing sheet or plate having a long rectangular section in the width direction of the plane of an original document between the light source and the read station of the document plane.  
     CONSTITUTION: In the facsimile, etc., the outer circumference of fluorescent lamp 1 is covered by mirror 6, and original document plane 2 is radiated by its projected light unit 1a obliquely underneath. One end 4a of optical fiber 4 arranged as the rectangular form such that it may coincide with the length of the width direction of the document plane 2 is disposed obliquely above the read station 3 of the document plane, and the reflecting light from the read station 3 is incident to introduce to the other end 4b face to face with image sensor 5. Light introducing plate 8 made of, for example, acrylic resin is interposed between the projected light unit 1a of the light source 1 and the read station 3. The light introducing plate 8 is of rectangular section, and its length coincides with the length of the fluorescent lamp 1 and of the width direction of the document plane 2, and the end face 8a is face to face with the projected light unit 1a while the other end face 8b faces obliquely the read station from the above. And the projected light of the fluorescent lamp 1 is introduced within the light introducing plate efficiently to the read station 3. 
     COPYRIGHT: (C)1979,JPO&Japio
Patent JP-S5386452-A (JP)
Title: Contact-less switching circuit
Inventor: OOTSU TATSUO
IPC: H01H47/32
Filed: 1977-01-08
Abstract: PURPOSE:To avoid a mistrigger together with to make an establishment of a circuit constant easier by adding a pulse generating circuit to generate rectangular wave synchronizing with a power source and a flip-flop circuit.
Patent JP-H10194574-A (JP)
Title: Image forming system
Inventor: ASAI YUKO
IPC: G03G15/00
Filed: 1997-01-07
Abstract: PROBLEM TO BE SOLVED: To provide an image forming system for automatically preparing a confidential document, which may be handled as a secret document for privacy protection. SOLUTION: An image forming system involves a finisher 9 coupled by means of a reversal unit 8 to its copying machine 1. The finisher 9 comprises a stapler part 62 for stapling sheets stacked on its tray 63 with its stapler 64, and a sheet folder part 74 for folding sheets with its sheet folding rollers 75, 76 and 77. In a confidential mode, copies of a confidential original are fed to the finisher 9 with their image-formed side being oriented downward, where they are folded in two with their image-formed side being inside in the sheet folder part 74 and then are stapled in the Chinese style at the side opposite to the fold in the stapler part 62.
Patent LT-IP757-A (LT)
Title: New sulfonylcarbamide
Inventor: SCHURTER ROLF
IPC: C07D521/00
Filed: 1993-07-02
Abstract: N-Pyridylsulphonyl-N'-pyrimidinylureas of the formula I <IMAGE>  in which     R1 represents methyl or methoxy and   R2 represents hydrogen or methyl; and the salts of these compounds with amines, alkali metal bases or alkaline earth metal bases or with quaternary ammonium bases have good selective herbicidal and growth-regulating properties when used pre- and post-emergence.
Patent MA-39605-A (MA)
Title: Arbre photovoltaïque
Inventor: LUSSANA STEFANO
IPC: F24V30/00
Filed: 2015-08-31
Abstract: Structure d'ameublement urbain munie d'au moins un panneau solaire comprenant: une structure métallique intérieure; une couche de verdure synthétique placée sur ladite structure métallique intérieure; au moins un panneau photovoltaïque attaché à ladite structure métallique interne.
Patent PH-21929-A (PH)
Title: 3-aminobenzoxazepine derivatives
Inventor: SUGIHARA HIROSADA
IPC: C07D215/00
Filed: 1984-08-10
Abstract: Novel condensed, seven-membered ring compounds of the formula 
<CHEM>
 [wherein R<1> and R<2> are independently hydrogen, halogen, trifluoromethyl, lower alkyl or lower alkoxy, or both jointly form tri- or tetramethylene; R<3> is hydrogen, optionally substituted lower alkyl or optionally substituted aralkyl; R<4> is hydrogen, optionally substituted alkyl, optionally substituted aralkyl or optionally substituted cycloalkylalkyl; Y is a carboxyl group which may be esterified or amidated; m is 1 or 2] and salts thereof. 
<??>These compounds and salts thereof exhibit inhibitory activity on angiotensin converting enzyme and so forth, and are of value as an agent for diagnosis, prevention and treatment of circulatory diseases (e.g. hypertension, cardiopathy, cerebral apoplexy).
Patent PH-25862-A (PH)
Title: IFN-gamma as an active substance for inhibiting and preventing degradation processes in bone
Inventor: PETERLIK MEINRAD
IPC: A61P3/00
Filed: 1986-05-30
Abstract: gamma -IFN is used to prepare a pharmaceutical having a regulatory action on the processes occurring in the formation and destruction of bone.
Patent PH-22390-A (PH)
Title: Cardiotonic thiazolones
Inventor: SCHNETTLER RICHARD A
IPC: A61K31/426
Filed: 1986-11-10
Abstract: Thiazolones enhance myocardial contractile force and are useful as cardiotonics in the treatment of heart failure.
Patent PH-29904-A (PH)
Title: Contrast media
Inventor: BERG ARNE
IPC: A61K49/00
Filed: 1992-03-27
Abstract: PCT No. PCT/EP92/00698 Sec. 371 Date Sep. 24, 1993 Sec. 102(e) Date Nov. 24, 1993 PCT Filed Mar. 27, 1992 PCT Pub. No. WO92/17215 PCT Pub. Date Oct. 15, 1992.An imaging contrast medium comprising a physiologically tolerable multinuclear complex (as defined in claim 1) is disclosed. The multinuclear complex contains at least two, but preferably three or more contrast enhancing atoms. For X-ray or ultrasound imaging techniques heavy metal atoms are used to enhance contrast, whereas in Magnetic Resonance Imaging paramagnetic metal atoms are contrast enhancing. Molybdenum and tungsten are preferred contrast enhancing atoms. The medium may also be used therapeutically.
Patent PH-31332-A (PH)
Title: Lactic acid-containing cyclic depsipeptides havin g 18 ring atoms as endoparasiticidal agents, and process for their preparation.
Inventor: PETER JESCHKE
IPC: C07C235/12
Filed: 1995-02-23
Abstract: Prodn. of lactic-acid-contg, optically active, cyclic depsipeptides with 18 ring atoms with the aid of a Fusarium fungus or an enzyme prepn. isolated from such a fungus is new. Also claimed is the prodn. of lactic-acid-contg. optically active, cyclic depsipeptides with 18 ring atoms (enniatins)of formula (I) from optically active amino acids of formula (II)-(IV), optically active or racemic  alpha -hydroxy acids of formula (V) and (VI) and optically active or racemic lactic acid, where the reaction is effected in the presence of a Fusarium fungus in a nutrient medium or in the presence of a microbial synthetase in a buffer system: R1,R2 and R4 = H, 1-8C alkyl, hydroxyalkyl, mercaptoalkyl, alkylthioalkyl, alkylsulphinylalkyl, alkylsulphonylalkyl, carboxyalkyl, alkoxycarbonylalkyl, carbamoylalkyl, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl, guanidinoalkyl, 2-6C alkenyl, 3-8C cycloalkyl, or aralkyl or heteroarylalkyl opt. substd. by halogen, OH, alkoxy, alkyl, NO2 or NH2; R3 and R5 = H, 1-8C alkyl, hydroxyalkyl, mercaptoalkyl, alkylthioalkyl, alkylsulphinylalkyl, alkylsulphonylalkyl, 2-6C alkenyl, 3-8C cycloalkyl, or aralkyl or heteroarylalkyl opt. substd. by halogen, OH, alkoxy, alkyl, NO2 or NH2.
Patent TR-27033-A (TR)
IPC: C07K5/08
Filed: 1993-08-10
Abstract: Aqueous liquid detergent compositions are described which comprise a proteolytic enzyme wherein the proteolytic activity is reversibly inhibited by a peptide trifluoromethyl ketone.
Patent UY-32845-A (UY)
Title: Sistema y procedimiento de autenticación mediante áreas geográficas de acceso fiable
Inventor: ENRIQUE LOPEZ GARCIA JOSE
IPC: H04L29/00
Filed: 2010-08-17
Abstract: Aplicable a sistemas de telecomunicaciones, aporta un factor garante adicional de la identidad que aporta un usuario cuando accede a un proveedor de servicios basado en la coincidencia de la localización del usuario, cuando este porta algún dispositivo susceptible de ser localizado mediante tecnologías GSM, GPRS, UMTS, WIFI y GPS, con al menos un área de acceso fiable asociada a dicho usuario.
Patent UY-33372-A (UY)
Title: ?análogos de quinolina bi?funcionales, su uso en la manufactura de medicamentos,composiciones que los comprenden y procesos de preparacion?.
Inventor: BAKER WILLIAM R
IPC: A61K31/47
Filed: 2011-05-09
Abstract: Se proporcionan compuestos análogos de quinolina bi-funcionales, así como también su uso en la manufactura de un medicamento para el tratamiento de la inflamación pulmonar o de la broncoconstricción y composiciones que los comprenden y procesos para su preparación.
Patent UY-36853-A (UY)
Title: Promotor de vegetales y utr 3’para expresión transgénica
Inventor: DELKIN ORLANDO GONZALEZ
IPC: C12N15/84
Filed: 2016-08-15
Abstract: Composiciones y métodos para promover transcripción y traducción de una secuencia nucleotídica en una planta o una célula de planta, utilizando un promotor y/o una 3' UTR del gen Zrp2 de Zea mays. En algunas realizaciones, un promotor de un gen Zrp2 de Zea mays se halla operativamente unido a un intrón de Ubiquitina 1 de Zea mays y funciona en plantas para promover la transcripción de secuencias nucleotídicas operativamente unidas. En otras realizaciones, una 3' UTR de un gen Zrp2 de Zea mays funciona en plantas para terminar la transcripción de secuencias nucleotídicas operativamente unidas.
Patent UY-37656-A (UY)
Title: Compuestos que inhiben la proteína mcl-1
Inventor: HARRINGTON PAUL E
IPC: C07D285/00
Filed: 2018-04-02
Abstract: En la presente se proveen inhibidores de la proteína leucemia de células mieloides 1 (Mcl-1), métodos para su preparación, composiciones farmacéuticas relacionadas, y métodos de uso de esto. Po ejemplo, en la presente se proveen compuestos de Fórmula I, o un estereoisómero de estos; y sales farmacéuticamente aceptables de estos y composiciones farmacéuticas que contienen los compuestos. Los compuestos y composiciones provistas en la presente pueden usarse, por ejemplo, en el tratamiento de enfermedades o afecciones, como cáncer.
Patent UY-39604-A (UY)
Title: Moduladores de la proteína reguladora de conductancia transmembrana de la fibrosis quística y métodos de uso
Inventor: XENIA B SEARLE
IPC: C07D493/10
Filed: 2022-01-04
Abstract: La presente invención proporciona compuestos de Fórmula (I) (I) en donde R1, R2, R3, m y n tienen cualquiera de los valores definidos en la memoria descriptiva, y sales farmacéuticamente aceptables de estos, composiciones farmacéuticas que los comprenden y métodos para tratar la fibrosis quística mediante la administración de un compuesto de la invención.
Patent YU-18197-A (YU)
Inventor: JOVAN RISTA
Filed: 1997-05-12
Abstract: Pronalazak se odnosi na automatsku mašinu za istovar iz prikolice, transport i šićenje klipova kukuruza, mašinu koja bi istovremeno, uz mogućnost regulisanja brzine, preciznosti i bez zagušenja vršila istovar iz prikolice, transport, čišćenje-komušanje, odvajanje otpalih zrna a očišćeni kukurzu transportovala u skladišni prostor-koterke na prirodno sušenje. Automatska mašina za istovar iz prikolice, transport i šićenje klipova kukuruza se sastoji od koritastog transportera (1), komušaljke (2) i kosog elevatora (3). Horizontalni transporter (1) je zaštićen bočnim štitnicima (15) i šiberima (10) dok se sa strane transportera (1) nalazi stranica (7) sa bočnim graničnicima (8). Sa gornje strane se nalazi vodilica (39) pužnog izuzimača (4) i lopate (40). Mašina se nalazi na okretljivim točkovima (14) i transportnim točkovima (20). Pogon se, preko sklopa (17) lanca sa lopaticama i usmerivača klipova (18) unutar horizontalnog transportera (1) i sklopa (30) lanca kosog elevatora (3), vrši od elektromotora (5) ili kardana (19). Mašina poseduje i reflektor (38) za noćni rad, elemente (11, 33, 34, 35, 36) signalizacije i komandne table i poteznicu (12).
Patent YU-47396-A (YU)
Inventor: ALAN DODGE JEFREY
IPC: A61K31/495
Filed: 1996-08-16
Abstract: Ovaj pronalazak opisuje seriju supstituisanih propanamina, njihovih farmaceutski prihvatljivih soli ili solvata, kao što je (R)-3-(1H-indol-3-il)-1-[N-(2-metoksibenzil)acetilamino]-2-[N-(2-((4-piperidin-1-il)piperidin-1-il)acetil)amino]propan dihidrohlorid trihidrat i njihove farmaceutske formulacije sa prihvatljivim nosačima, rastvaračima ili puniocima, koje su korisne u lečenju fizioloških stanja koja se mogu modulovati povećanjem hormona rasta.
Patent YU-60493-A (YU)
Title: Novi preparati na bazi nomegestrol derivata i postupci za njihovo dobivanje
Inventor: LANQUETIN M
IPC: A61L31/00
Filed: 1993-09-21
Abstract: Novi preparat u obliku potkožnih implanata koji sadrže efikasnu količinu 3-supstituisanog 6-metil 17 alfa-ORi 20-okso 19-nor pregna 4,6-diena i postupak za njihovo dobivanje. Postupak obuhvata uvođenje efikasne količine mikronizovano, mikrokristalnog ili isitnjenog aktivnog sastojka u suplju cev polimernog materijala sa unutrašnjim kanalom dužine 20 do 50 mm, zatapanje krajeva cevi pomoću specifičnog lepila i sterilizaciju dobivenog implanta.
Patent YU-70599-A (YU)
Inventor: COLE ERIC T
IPC: C10L3/00
Filed: 1999-12-28
Abstract: Ovo je postupak za dobijanje tečnosti (19) pod pritiskom bogate metanom iz višekomponentne dovodne struje (10) koja sadrži metan i jednu komponentu koja se može zamrznuti, koja ima relativnu isparljivost manju nego metan. Višekomponentna dovodna struja (10) uvodi se u sistem (31) za razdvajanje koji ima sekciju za zamrzavanje koja radi na pritisku iznad 1380 kPa i u uslovima za obrazovanje čvrstih materijala od komponente koja se može zamrznuti i jednu destilacionu sekciju postavljenu ispod sekcije za zamrzavanje. Sistem (31) za razdvajanje proizvodi struju (14) pare bogate metanom i tečnu struju (12) bogatu komponentom koja se može zamrznuti. Bar se deo struje pare hladi radi proizvodnje kondenzovane struje bogate metanom koja ima temperaturu iznad -112В°C i pritisak dovoljan da tečnost bude na svojoj tački mehurenja ili ispod nje da bi se dobio proizvod (20) i struja (21) za obezbedjenje rashladjivanja sistema za razdvajanje.
Patent YU-79290-A (YU)
Title: Postupak za razlaganje polihlorinovanih bifenila
Inventor: WILWERDING M
IPC: C07C25/18
Filed: 1990-04-20
Abstract: Postupak za razlaganje polihlorinovanih bifenila, kontaktiranjem sa katalitičkom Lewisovom kiselinom u nevodenoj tečnoj sredini, u prisustvu katjona koji se jedini sa hlorom iz PCBs-a radi gradjenja čvrstog hlorida katjona koji će se istaložiti iz tečne sredine. Poželjne Lewisove kiseline su metalni halidi, naročito kombinacija aluminijum hlorida i feri hlorida, a poželjni katjon je kalijum u obliku kalijum hidroksida. Postupak je uspešan kako pri kontinualnoj tako i pri diskontinualnoj operaciji.
Patent YU-98292-A (YU)
Title: Sintetički poliamini arila i postupak za njihovo dobijanje
Inventor: SACCOMANO N A
Filed: 1992-11-13
Abstract: SINTETIČKI POLIAMINI ARILA I POSTUPAK ZA NJIHOVO DOBIJANJE, opisana su jedinjenja formule R-(CH2)m-CO-R', u kojoj je R 5-člani do 7-člani karbociklični sistem ili 8-člani do 11-člani karbobiciklični sistem, ili bilo koji takav sistem supstituisan jednim ili više F, Cl, Br, OH, C1 do C4 alkil, C1 do C4 alkoksi, CF3, fenil, amino, C1 do C4 alkilamino i di(C1 do C4 alkil)amino; m je 0 ili 1; R' je - /NH(CH2)n/xNH2; svako n je nezavisno 2 do 5; i x je 1 do 6, i njihove farmaceutski prihvatljive adicione soli sa kiselinom. Ta jedinjenja su potentni antagonisti eksitacionih aminokiselinskih neuro prenosnika. Ova jedinjenja su korisna kao psihoterapeutska sredstva za sisare, kao aktivni sastojak kod far-maceutskih smesa za lečenje stanja kod sisara posredovanih ek-sitacionim aminokiselinskim neuro prenosnicima i kod uništavanja štetočina kod beskičmenjaka. Takodje je opisan postupak za dobijanje tih jedinjenja.
Patent BE-818663-A (BE)
Title: Domestic tap with controlled action - a spring loaded action is applied to turn on and off and increase its life
Inventor: TOMIATI U
IPC: F16K31/60
Filed: 1974-08-09
Abstract: Between the top of the tap and the operating valve is fitted a coupling which is fixed to the tap body. This contains a cam, turned when operating the tap. The cam then opens or closes the valve. Its action is loaded by a tension spring and has a profile which limits the amount of turn between open and closed positions. The combination of spring loading and limitation of turning gives a smooth action and long life. The cam has a pair of flanges which engage a fixed stop at maximum and minimum opening positions.
Patent BE-898929-A (BE)
Title: Procede de preparation d'acides aryloxybenzoiques a groupe sulfonamide
IPC: C07F9/58
Filed: 1984-02-16
Abstract: Préparation de N-sulfonyl-aryloxy benzamide (I) par réaction d'acide aryloxybenzoique avec un sulfonyl isocyanate ou isothiocyanate. Le procédé selon l'invention se distingue par la simplicité du mode de récupération du produit final car celui-ci est généralement insoluble dans le milieu de réaction chaud et s'en sépare en cristallisant sous une forme pure, en sorte que cette récupération se réduit essentiellement à une filtration. On peut aussi faciliter cette filtration par addition d'un non solvant. Les dérivés ainsi préparés sont destinés à servir en tant que herbicides.
Patent BE-900165-A (BE)
Title: Individual tamperproof cardboard packages - for foodstuffs and pharmaceuticals, esp. for presentation of chocolates with coffee
IPC: B65D75/30
Filed: 1984-07-13
Abstract: Individual tamperproof packages are claimed in which the edges of two pieces of cardboard or similar are joined to as to contain the prod. to be packaged between them, at least one of the pieces of card having cuts made therein so that it can be formed to, or will automatically conform to, the required shape of the package. The package can be completely sealed.
Patent BE-903630-A (BE)
Title: Wind-water-ski sail board - has two skis with footholds joined by bridge with sail, permitting skis to move w.r.t. each other
IPC: B63B35/79
Filed: 1985-11-13
Abstract: The sail-board assembly comprises two boards (1) with respective foot holds (10) and connected (9) via a movable transverse bridge (2) with a central mounting point (3) for a mast with a sail. - The connections (9) permit relative movements of the boards in longitudinal direction, in vertical direction (i.e. one board higher than the other), angularly in forward direction, and angularly in lateral direction. A stop mechanism (12) may be provided to limit or prevent any or all of the possible degrees of freedom of these relative movements.
Patent BE-903746-A (BE)
Title: Compose a activite antimicrobienne, sa preparation et formes pharmaceutiques en contenant.
Inventor: RAINOLDI A
IPC: C07D521/00
Filed: 1985-11-29
Abstract: Chlorure de 1-(2,4-Dichloro-beta-((2,4-dichlorobenzyl)oxy)phénéthyl) -1- ((dihydrocinnamoyl)oxy)méthylimidazolium de formule I:son procédé de préparation en faisant  réagir le 1-((dihydrocinnamoyl)oxy) - methylimidazole avec le 1-chloro-2-(2,4-dichlorophényl) -2- ((2,4-dichlorobenzyl)oxy)ethone. Application dans le traitement des infections entanées mycotiques ou bactériennes, des maladies de la cavité oro-pharyngale et du tractus gastro-intestinal.
Patent CA-1036975-A (CA)
Inventor: DOTSON RONALD L
IPC: C08J5/22
Filed: 1972-10-20
Granted: 1978-08-22
Abstract: ABSTRACT Concentrated alkali metal hydroxy substantially free of alkali metal halide and other impurities is produced by the electrolysis of an alkali metal halide solution in an electrolytic cell having a dimensionally stable anode and a metalcathode separated by an electrically conductive stable selectively permeable hy-drated cation ion-exchange membrane film of a fluorinated copolymer having pendant sulfonic acid groups or derivatives of such groups.  The membrane film is capable of use at high temperatures and under severely corrosive chemical conditions for extended periods without degradation.
Patent CA-1039231-A (CA)
Inventor: LESTER JOHN H JR
IPC: C07C255/04
Filed: 1973-09-04
Granted: 1978-09-26
Abstract: ELECTROLYTIC HYDRODIMERIZATION PROCESS IMPROVEMENT            ABSTRACT OF THE DISCLOSURE       In a process for hydrodimerizing an olefinic nitrile, amide or ester by electrolyzing an aqueous solution of the olefinic starting material, quaternary ammonium cations and a conductive salt, formation of hydro-gen at the cathode can be substantially inhibited and the current efficiency of the process can be thereby significantly increased by including in the solution a nitrilocarboxylic acid compound such as ethylenediaminetetra-acetic acid or a salt thereof. Particularly good results are obtained when the solution also contains a boric acid, a condensed phosphoric acid or an alkali metal or ammonium salt thereof.
Patent CA-1036744-A (CA)
Inventor: HAUPT HEINRICH
IPC: C08G64/08
Filed: 1974-03-07
Granted: 1978-08-15
Abstract: Abstract of the Disclosure A process is provided for making high molecular weight halo-substituted aromatic polycarbonates in a phase boundary reaction in which an o,o,o',o'-tetrahalogenobisphenol and phosgene are reacted in an aqueous medium at a pH of 7 to 9 in the presence of from 2 mol% to 20 mol% catalyst in a first step and the resulting product is polycondensed at a pH at least about 13 in a second step.