baber/WOPTO huggingface dataset:
Patent CU-22359-A1 (CU)
Inventor: AUGIER CALDERON ANGEL G
IPC: G01P3/36
Filed: 1993-03-26
Abstract: METODO PARA LA MEDICION DE LA MASA MEDIA DE PARTICULAS EN SISTEMAS                                  DISPERSOS, CARACTERIZADO POR EMPLEAR COMO MEDIDA DE ESTA MASA, A TRAVES DE                          LA MEDICION PREVIA DE LA VELOCIDAD TERMICA DE LAS PARTICULAS DEL MEDIO Y DE                         LA TEMPERATURA ABSOLUTA DE ESTE, EL VALOR DE LA MASA MEDIA CARACTERISTICA,                          DEFINIDA COMO:M = 3KT/V2 DONDE:  T_ TEMPERATURA ABSOLUTA DEL MEDIO                                  DISPERSO. V_ VELOCIDAD TERMICA DE LAS PARTICULAS EN EL MEDIO. K_ CONSTANTE                          DE BOLTZAM.\!
Patent WO-02079373-A1 (WO)
Title: Catalyseur de demercaptanisation non alcalin pour compositions d'hydrocarbures
Inventor: KONOVALOV ALEXEI
IPC: C10G27/10
Filed: 2001-03-29
Abstract: La présente invention concerne un catalyseur destiné à la démercaptanisation oxydative (adoucissement) de compositions d'hydrocarbures comprenant le pétrole, des distillats de pétrole, des essences, des kérosènes, des combustibles pour réacteur, des gazoles et des huiles de chauffage, des gaz naturels liquides, etc.. ce catalyseur peut être utilisé dans un processus de lit fixe ou dans un processus de lit fluidisé. Un catalyseur est constitué d'une partie active et d'un élément inerte. La partie active contient l'oxyde d'un métal de transition du groupe ib du tableau périodique V-VIIb, soit de l'oxyde de Ni, soit de l'oxyde de Co, soit des mélanges d'oxydes de ces éléments, des sels de métal de transition et des éléments organiques contenant de l'azote. L'élément inerte est l'oxyde d'un élément des groupes IIa, III, IV, un oxyde de Fe ou un composé chimique comprenant au moins 95 % d'oxyde des éléments indiqués ou encore un mélanges des composés susnommés. Un procédé de préparation de ce catalyseur est le suivant: le composé inerte est imprégné d'une solution aqueuse de sel de métal de transition, le produit résultant est calciné dans un flux d'air destiné à la formation d'oxyde de métal et le sel de transition ainsi que les éléments organiques contenant de l'azote sont déposés en un solvant organique à partir de leur solution. Une application de ce catalyseur dans le cadre de la démercaptanisation oxydative de compositions d'hydrocarbures consiste à passer ces dernières à travers le lit fixe ou le lit fluidisé d'un catalyseur à 10-800 C sous une à dix atmosphères. La démercaptanisation se déroule en présence d'air, d'oxygène ou de gaz ne contenant pas moins de 5 % d'oxygène.
Patent WO-0109508-A1 (WO)
Title: Kraftstoffhochdruckspeicher
Inventor: FRANK KURT
IPC: F02M55/02
Filed: 2000-08-01
Abstract: Die Erfindung betrifft einen Kraftstoffhochdruckspeicher für ein Common-Rail-Kraftstoffeinspritzsystem einer Brennkraftmaschine, mit einem rohrförmigen Grundkörper (1), der mit mehreren Anschlüssen (5 bis 8) ausgestattet ist. Um einen Kraftstoffhochdruckspeicher zu schaffen, der für eine grosse Anzahl ähnlicher Motoren verwendet werden kann, sind an dem rohrförmigen Grundkörper (1) eine durchgehende Anschlussleiste oder mehrere Anschlussstutzen (5 bis 8) ausgebildet, deren Abmessungen (b) in Längsrichtung des rohrförmigen Grundkörpers (1) grösser sind als der für die Anschlüsse (9) erforderliche Platz.
Patent WO-0142863-A1 (WO)
Title: Vorrichtung und verfahren zur (vibro-) akustischen überwachung eines verfahrens- und/oder fertigungstechnischen prozesses
Inventor: MUELLER KLAUS-DIETER
IPC: G05B19/418
Filed: 2000-12-01
Abstract: Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur akustischen Überwachung eines verfahrens- und/oder fertigungstechnischen Prozesses (2) mit Signalerfassungsmitteln (10, 11, 12, 13) zur Erfassung von Luft- und/oder Körperschallsignalen zur digitalen Weiterverarbeitung in Überwachungsmitteln (6), mit Steuerungsmitteln (5) zur Steuerung des Prozesses (2) und mit einem Bedien- und Beobachtungssystem (4) zum Bedienen und Beobachten des Prozesses (2). Zur Reduzierung des Hardwareaufwands wird vorgeschlagen, daß die Überwachungsmittel (6), die Steuerungsmittel (5) und das Bedien- und Beobachtungssystem (4) als Softwareprogramme für einen Standard-Rechner (7) ausgebildet sind, wobei zur Kommunikation zwischen den Überwachungsmitteln (6), den Steuerungsmitteln (5) und dem Bedien- und Beobachtungssystem (4) OPC-Mechanismen vorgesehen sind.
Patent WO-0158299-A1 (WO)
Title: Verfahren zur herstellung massgefertigten schuhwerkes
Inventor: KLOPF MICHAEL
IPC: A43D5/00
Filed: 2000-12-12
Abstract: Die Erfindung betrifft ein Verfahren zur Herstellung massgefertigten Schuhwerkes, insbesondere von Massschuhen, unter Verwendung einer vorgefertigten Sohle (1), eines vorgeformten Schaftes (6) und einer Einlage (5). Der Aufbau geschieht am Fusse des späteren Schuhträgers, indem eine vorgefertigte Sohle (1) entsprechend den Abmassungen des Fusses des späteren Schuhträgers ausgesucht wird. Auf die Sohle (1) wird eine Einlage (5) aufgebracht und Passgenauigkeit von vorgefertigter Sohle (1) und Einlage (5) am Fuss überprüft. Ein vorgeformter Schaft (6) wird über den Fuss des späteren Schuhträgers geschoben und mit der vorgefertigten Sohle (1) passgenau verbunden. Weiter betrifft die Erfindung vorzugsweise nach dem Verfahren hergestelltes Schuhwerk.
Patent WO-0156792-A1 (WO)
Title: Verfahren zur regelung einer bahnspannung in einer rotationsdruckmaschine
Inventor: GLOECKNER ERHARD HERBERT
IPC: B41F33/06
Filed: 2001-01-05
Abstract: Verfahren zur Regelung einer Bahnspannung in einer Rotationsdruckmaschine, wobei die Bahn (B) mindestens ein Druckwerk (06, 07, 08, 09) durchläuft, indem eine Änderung in der Dehnung der Bahn während des Fortdruckes mittels einer Änderung einer Differenz einer ersten Geschwindigkeit (u 09) und einer zweiten Geschwindigkeit (u 11) ermittelt wird. Der Änderung der Dehnung wird mittels einer Änderung einer Spannung (S2) der Bahn vor dem ersten Druckwerk (06) entgegengewirkt.
Patent WO-0173214-A1 (WO)
Inventor: ROESSMANN MARKUS
IPC: E02F3/40
Filed: 2001-03-07
Abstract: The invention relates to a loader and bulldozer (1) that is provided with a loading device (2) in the form of a shovel or a spoon. An electromagnet (3) is assigned to said device. Metal rests can thus be separated from the remaining material, especially when rumble is sorted, by attracting the metal rests against a partition wall (8) that protects the electromagnet (3). Remaining rubble is sorted according to size by means of the base surface (5) of the loading device (2), whereby said surface is designed in a sieve-like manner. The electromagnet (3) is deactivated when the loading device (2) is situated over a separate collecting device.
Patent WO-0211943-A1 (WO)
Title: Vorrichtung und verfahren zum laden eines nietmoduls mit blindnietmuttern
Inventor: KADDATZ UWE
IPC: B23P19/00
Filed: 2001-08-02
Abstract: Vorrichtung zum Laden eines vertikal zwischen einer unteren Setzstellung und einer oberen Ladestellung bewegbaren Nietmoduls (10) mit Blindnietmuttern (100) mit einer Nietzuführung (22) bei der neben dem Nietsetzkopf (12) ein Becher (24) zur Aufnahme der Blindnietmuttern seitlich zwischen einer Stellung unter der Nietzuführung (22) und einer Stellung unterhalb des in Ladestellung befindlichen Nietmoduls (10) bewegbar angeordnet ist, wobei der Becher (24) mit einem Klemmzylinder versehen ist.
Patent WO-03015970-A1 (WO)
Inventor: GRUHLER SIEGFRIED
IPC: B23D31/00
Filed: 2002-08-01
Abstract: The invention relates to a device (2) for fracture-separating workpieces, comprising an expanding mandrel (16), which can be inserted into a bearing bore (6) to fracture-separate the latter and can be expanded in a radial direction in order to apply a fracture-separation force. The device also comprises an oscillation device (26), by means of which the expanding mandrel (16) can be subjected to an alternating dynamic force that is superimposed on or added to the fracture-separation force, to create oscillations in the bearing bore (6).
Patent WO-03091665-A1 (WO)
Inventor: HUGENSCHMIDT MARKUS
IPC: H01B7/08
Filed: 2003-04-25
Abstract: The invention relates to a cable (1) equipped with at least two functional elements (7, 7') mounted thereon. According to the invention, at least two of the functional elements (7, 7') are sensors.
Patent WO-2004027284-A1 (WO)
Title: Tauchkolben für eine luftfeder
Inventor: MICHELS MANFRED
IPC: B60G11/28
Filed: 2003-09-03
Abstract: Die Erfindung betrifft einen Tauchkolben für eine Luftfeder, der über ein Zentrierelement (8) auf einem Achskörper (5) oder einem Längslenker einer Fahrzeugachse zentriert ist. Um eine Anordnung von Tauchkolben und Zentrierelement zu schaffen, die bei einer gleichzeitig sicheren Verbindung von Zentrierelement einerseits und Achskörper andererseits eine geringe Bauhöhe aufweist, wird mit der Erfindung vorgeschlagen, dass der Tauchkolben auf seiner dem Zentrierelement zugewandten Seite eine Ausformung aufweist.
Patent DE-1805951-A1 (DE)
Title: Electrolyte for capacitors
Inventor: FRANK OEHME DIPL-PHYS
IPC: H01G9/02
Filed: 1968-10-30
Abstract: Electrolyte for capacitors having at least one Al electrode, consists mainly of boric acid, at least one polyvalent alcohol (esp. ethylene glycol), nitrogen-containing bases and reaction products of these components. Such combinations of ammonia and/or ammonia salts with at least one aminoalcohol, (pref. ethanolamines) are used that the electrolyte contains 0.05 to 5 mol. pref. 0.1 to 2 mol. of aminoalcohols per mol. of ammonia and pref. already in starting mixture, less than 0.5 mol. water per mol. of boric acid. The mixture may also contain 0.1 to 0.6% phosphoric acid or phosphate. After mixing the product is heated to form borate esters.
Patent DE-1807772-A1 (DE)
Title: Knitting needle
IPC: D04B17/04
Filed: 1968-11-08
Abstract: The needles have ends which are adapted to take a flexible thread of plastics so that stitches may be knitted continuously to form circular garments. The thread has ratchet like ends which correspond with similar pegs in the foot of each needle and close fitting caps fit over the connections to hold the thread firmly to the needles.
Patent DE-1816124-A1 (DE)
Title: Solvent extracted oil
Inventor: IDAS ALFRED
IPC: C10M169/04
Filed: 1968-12-20
Abstract: A solvent-extracted oil is produced form mineral oil by hydroraffinating the mineral oil, and extracting it with a solvent, whereby an extract is obtained which is then separated from the solvent and subjected to a raffination or final treatment.
Patent DE-1900562-A1 (DE)
Title: Asting compound for structural elements - used for echo sounding
Inventor: JOHN DIETER
IPC: C08L75/08
Filed: 1969-01-07
Abstract: Mixture of 23-59% polyurethane (polytetramethylene etherglycol + toluydiisocyanate); 15-55% epoxy resin (resin based on bisphenol-A + epichlorohydrin); 16-22% crosslinking agent based on 4,4'-methylene-bis-(2-chloroaniline), is processed by heating to 100 degrees C, casting into pre-heated mould, and curing at 140 degrees C for at least 5 hrs.
Patent DE-1921000-A1 (DE)
Title: Mechanical scanner for machined surfaces of - workpieces
Inventor: HAERTER MANFRED
IPC: G01B5/00
Filed: 1969-04-24
Abstract: The guide rod for the dial gauge holder is joined to the base through a deflection disc which can be readjusted by tightening one or more of four bolts. The dial gauge holder is fitted with running pads made of tetrafluorethylene.
Patent DE-1929545-A1 (DE)
Title: Feeding powder forming materials into - pressurised explosion prone reaction vessels
Inventor: SCHLEICHER RUDOLF
IPC: B01J3/02
Filed: 1969-06-11
Abstract: The power material is intermittently supplied in measured amounts via a sluice-valve to the reaction chamber, by a gas-forming liquid carrier at normal pressure and a temp. above 20 degrees C. The liquid is also a reaction component, which is evaporated by heat and lowering of surface tension and subsequently dried by inert-gas streaming. Pref. the inert gas is nitrogen.
Patent DE-1959564-A1 (DE)
Title: Liquid crystal coated panels for temperature - or electric field activated display system
Inventor: BAEUMER WILHELM DIPL-CHEM DR
IPC: G01R5/28
Filed: 1969-11-27
Abstract: Display panels activated by temp. changes (using liquid crystals- LC-) of pref. cholesteryl esters or by electrical fields (LC of the nematic type, pref. p,p'-disubstituted benzylidene-anilines) made by coating a suitable carrier (any high-molecular organic polymer, metals or paper, transparent polymers being darkened with a suitable pigment to make the LC signal more prominent) with a soln. of the LC (25-60% LC in a water-soluble high-molecular organic binder) as a 10% soln. to a thickness of 0.03-0.1 mm. The LC layer may be coated by a suitable compound (collodium) to protect against contamination. The panels may be reused several times. They are used to monitor temp. for a variety of industrial purposes, for switching at given potentials; for advertising. The carrier is coated using a stencil with the appropriate signs, words or numbers.
Patent DE-2010876-A1 (DE)
Title: Two stage cement cooler
IPC: F27D3/00
Filed: 1970-03-07
Abstract: Two stage cooler for combustion products leaving a cement kiln in which (a) the first stage is a direct a action cooler not larger than sufficient to preheat the air of combustion (b) the second stage is an indirect cooler with several chambers having upper entrance and lower exit parts and a large number of channels for the refrigerant sharply inclined with respect to the direction of fall of the product through the cooling chamber. The second chamber has a mechanism controlling the admission rate. A crusher is heated between the first and second stages of the cooler.
Patent DE-2020720-A1 (DE)
Title: Basic steel furnace fire bricks with longer working life
Inventor: GAREIS FRITZ DR-ING
IPC: C04B35/03
Filed: 1970-04-21
Abstract: A basic refractory stone for steel furnaces with increased working life composed of dolomite, magnesite and tar as binding agent also contains carbon as a binding agent which is insol. or sparingly sol. in tar and has grain size 0.04 mm, the solid residue contng. 10% hydrogen from the distillation of tar and pitch.
Patent DE-2020727-A1 (DE)
Title: Cartridge for fire arms
Inventor: F MELLOW DALE
IPC: F42B5/02
Filed: 1970-04-23
Abstract: The cartridge has normal cap and propellent (a nitrocellulose fibre is preferred). In front of these is a gas-sealing wad containing a small central hole, used to propel the canister containing the active agent up the bore. The canister may be of metal, glass, paper, plastics or similar. A delay composition of metal and metal oxide type (zirconium, boron, red lead or other known compounds) is stemmed into the rear of the main filling under a disc containing the emission hole. The main filling consists of fuel (sugar, aluminium or other metal powder), oxidant (chlorates, nitrates etc.), burning rate control (magnesium carbonate or inert substance) and binder (nitrocellulose or other high polymer); this burns at a stabilised rate to volatilize the active agent used. A range of 500 m. is possible. Missile is a canister containing a fuel-oxidant mixture together with an agent dispersed as an aerosol either on leaving the barrel of shotgun etc. as a trail along the trajectory, or with delay so as to be emitted in the target area, e.g. filling of CS lachrymator gas (Orthochlorobenzalmalononitrile), smoke, illuminant, insecticide, herbicide, etc.
Patent DE-2021866-A1 (DE)
Title: Refractory heads for steel ingot casting moulds
IPC: B22D7/10
Filed: 1970-05-05
Abstract: Refractory heads are fitted to the top of steel ingot casting moulds for reducing the size of the ingot head which has to be cut off. Pref. they have a tapered conical bore, which is rounded near the bottom. The invention reduces metal losses usually incurred when discarding the top part of an ingot.
Patent DE-2023602-A1 (DE)
Title: Knitted goods finishing-continuous process with spreader to keep - fabric in flat tension free condition
Inventor: FLEINER SIGMUND
IPC: D06B15/04
Filed: 1970-05-14
Abstract: The equipment to give a continuous finishing process for tubular knitted fabrics uses a spreader unit in the fabric's upwards path to the treatment tank to ensure that the fabric's wt. to the max. stress force on the material, and that it passes through the liquid treatment in a flat and tension-free state.
Patent DE-2023695-A1 (DE)
Title: Stress generating cement compsn
IPC: C04B7/32
Filed: 1970-05-14
Abstract: Cement comp. comprises a mixture of Portland cement and an expanding component, pref. calcium sulphate and a constituent contg. calcium aluminates in which quicklime has been added to the expansion component. The substance contg. the calcium aluminates is hydrated with the lime prior to mixing with the other constituents.
Patent DE-2031363-A1 (DE)
Title: Fabric doubling apparatus - improved to operate with knitted fabrics
IPC: B65H45/22
Filed: 1970-06-25
Abstract: In the appts. for uniformly aligning the edges of a woven fabric strip to be doubled, the edge zones run directly through the guide roll pair before doubling in which the edges each operate a roll actuating control means constructed from sensors of known type combined with a potentiometer circuit and a differential amplifier, the improvement which enables knitted fabrics to be successfully doubled, whereby the sensors affected continuously by the edges of the materials strip, situated behind the rods or rollers beginning about the folding when viewed in the direction of motion, cooperate with each edge of a material strip.
Patent DE-2038400-A1 (DE)
Title: (sugar) centrifuge damping bearing - comprising several superimposed flexible rings
Inventor: OTTO RAUERT MAX
IPC: B04B9/14
Filed: 1970-08-01
Abstract: A damping device for the hunting motion of eccentrically loaded centrifuges, esp. sugar centrifuges, comprises a damping unit consisting of a number of horizontally superimposed damping rings, bonded at their horizontal surfaces to rigid plates, by with the inner and outer edges of the rings free. The arrangement produces an increased restoring moment, as compared with a single rubber ring.
Patent DE-2039008-A1 (DE)
Title: Reflection-reducing layers - of solid particles in a transparent binder for application to glass surfaces
Inventor: HEIZ HANS
IPC: G02B1/111
Filed: 1970-08-05
Abstract: Solid particles in the size range of 0.5 - 10 mu are dispersed in a transparent binder and coated on a carrier in a thickness of 4-40 mu (depending on quality and size of the particles). The binder is pref. a paint resin based on a vinyl polymer, and the particles are pref. calcium silicate or aluminium stearate of 1-5 mu size. The coatings are suitable for application to glass panes, car windows and esp. to the screens of TV receivers to reduce light reflections without appreciable loss of light transmission.
Patent DE-2060825-A1 (DE)
Title: O-(4-cyano-3, 6-dihalophenyl)-carbonates - prepd from 4-cyano -2, 6-dihalophenyl-haloformate and glycollic acid butyl ester, select
Inventor: BECHER HEINZ-MANFRED DR
IPC: C07C255/53
Filed: 1970-12-10
Abstract: Title cpds. are of formula (I): (where X is Br or I; A is opt. branched alkylene (max. 6C); Y is CN or COOR; and R is opt. branched alkyl (1-8C) or allyl) and they are prepd. by reacting a cpd. (II) of formula (I); O-A-Y is Hal with a cpd. (III) : HO-A-Y or by reacting a cpd. (IV) of formula (I); -O-CO-O-A-Y is -OH with a cpd. (V) : Hal-CO-O-A-Y. (I) are selective herbicides esp. for use in cereal crops.
Patent DE-2061569-A1 (DE)
Title: Bullet proof cpd transparent sheet - comprising impact resisting plastic and foil re-inforced safety glass sheets
IPC: B32B17/10
Filed: 1970-12-15
Abstract: Bullet proof glass pane consists of several parallel sheets of which at least one faces the impact side and consits of bullet proof plastic sheet behind a glass sheet. The sheets are suitably spaced and are connected to each other along their edges using a sealing cpd. and spacers. The cpd. sheet pref. comprises >=1 bullet proof plastic sheet and a safety glass sheet which is covered by an elastic support layer. Pref. the plastic support layer consits of a foil attached to the glass surface, esp. placed between two glass sheets to which it is attached. The cpd. glass pane can withstand sevral bullet impacts.
Patent DE-2123270-A1 (DE)
Title: Optical brightener dispersions - made by adding complexes with low molecular cpds to aq solns
IPC: D06P1/613
Filed: 1971-05-11
Abstract: Aq. dispersions of optical brighteners (A) of low solubility, are made by adding their association (electron doner-acceptor) complexes with cpds. (B) of low m. wt. to solns. of polymeric substances (C) opt. contg. surfactants. (A) pref. has solubility below 5 g./l in water, (B) are pref. carboxylic acid amides or imides, urea, sulphoxide, unsat. carboxylic acid, or dimethyl formamide. (C) is pref. a vinyl polymer, graft polymer of vinyl cpds. on polyethers and/or polyacetals, or homo- and co-polymers of maleic acid and its derivs. Stable dispersions are readily obtained without tedious milling procedures and of any required viscosity. They are suitable for brightening textiles and paper and for incorporation in detergent powders.
Patent DE-2141462-A1 (DE)
Title: Softener for rinsing washed garments - contg an n,n-dialkyl -n-(2-hydroxyalkyl)-n'-acyl-aminimide textile softener
Inventor: PERNER JOHANNES DIPL CHEM DR
IPC: C11D3/00
Filed: 1971-08-19
Abstract: The textile softener of parent patent has the (I) R4-CO-N-NR1R2-CH2-CH(OH)-R3 (I) (where R1 and R2 are lower alkyl, esp. CH3; R3 is H, hydroxymethyl, 1-16C alkyl or alkyloxymethyl with 8-18C atoms in the alkyl gp.; R4 is pref. branched, opt. unsatd. 1-21, pref. 11-21C alkyl, 2-alkylaminoethyl or 2-dialkylaminoethyl with 12-22C atoms in the alkyl gp., providing that one of R3 and R4 is a long chain alkyl gp. with at least 10C atoms) and is combined with a diluent therefor and opt. the usual additives, and in amts. of 1-25%. In the present modification, the washed articles are treated, pref. in the final rinsing stage, with a softener contg., in soln. or dispersion, 0.1-2, pref. 0.2-1.0 g/l. of cpd. (I) and opt. the usual additives.
Patent DE-2210984-A1 (DE)
Title: Shell mould making machine - is turntable mounted
Inventor: POPOW ALEXEJ I
IPC: B22C11/10
Filed: 1972-03-07
Abstract: The plant comprises a turn-table with a drive, on which the frames are moved in >=3 steps from the compressing station to an ejecting station, where the moulds are ejected on to a conveyor. The compressing station comprises cylinders to the pistons of which are fitted pattern plates which are moved from either side into a frame, sand being blown in from a container above. The plant is automatic in operation and requires very little floor space. It is used for making moulds without mould boxes.
Patent DE-2218841-A1 (DE)
Title: Sterilizing plant - using ionizing radiation and heat, esp generated by microwave radiation
Inventor: GRUENEWALD THEO DR ING
IPC: C02F1/30
Filed: 1972-04-19
Abstract: For sterilization of human or animal feed stuff, medical equipment, or waste products including manure, which are infected with microorganisms, an irradiation machine e.g. an electron linear accelerator, is used to irradiate the product with ionizing radiation and part of the energy from the microwave source used to pump that accelerator is diverted into a separate horn radiator, close to the main beam window, which causes induction heating of the product. Alternatively an X ray machine may be used and the heat energy derived from the braking shields.
Patent DE-2233087-A1 (DE)
Title: Polyamides prodn - modified by amorphous silicic acid
Inventor: MICHEL ERICH DIPL CHEM DR
IPC: C08G69/18
Filed: 1972-06-30
Abstract: Modified polyamides (e.g. polycaprolactams) are produced by polymsn of lactams having >=7 ring-members, in presence of alkaline catalysts and polymsn, accelerators, amorphous silicic acid which has been pre-treated with hydrides, alcoholates or org. cpds of alkaline earth metals or elements of Gp. IIb or IIIa being added as processing modifier.