Abstract: A roller mill includes a grinding table, at least one grinding roller in rolling engagement with the grinding table, a main drive system for driving the grinding roller and/or the grinding table, and an auxiliary drive for driving the grinding table. The auxiliary drive includes at least two linear drives for rotating the grinding table and a control device for individually controlling the linear drives in order to provide an uninterrupted rotational movement.

Abstract: A roller mill includes a rotatable grinding table, at least one grinding roller that is retained rotatably on a pivot lever and is in rolling engagement with the grinding table, with the pivot lever being arranged for pivoting about a pivot lever axis, and a drive train associated with the grinding roller in order to drive the grinding roller with a fixed motor.

Abstract: A roller mill includes a mill housing which defines a grinding chamber, a grinding table which can rotate in the grinding chamber and at least one rotatable grinding roller which is in rolling engagement with the grinding table. A drive which is associated with the grinding roller and which has at least one gearing mechanism is further provided, at least a portion of the gearing mechanism being arranged in the grinding chamber in the region of the grinding roller and being in the form of an epicyclic gear system.

Abstract: A roller mill includes a rotatable grinding table, at least one grinding roller retained rotatably on a pivot lever and in rolling engagement with the grinding table, the pivot lever being pivotable about a pivot lever axis, and at least one drive train connected to the grinding roller and having a fixed motor and a fixed gearing mechanism. The drive train further has a gearing mechanism which pivots with the pivot lever and/or the grinding roller.

Abstract: The roller mill according to the invention substantially comprises at least one grinding roller and a grinding table, the grinding table having a grinding table inner space which is open in a downward direction, at least one grinding roller drive system for driving the grinding roller and a grinding table drive system for driving the grinding table. The grinding table drive system further has a gearless direct drive which is arranged in the grinding table inner space.

Abstract: A roller mill includes a grinding table arranged for rotation about a mill axis, at least one grinding roller rotated about a grinding roller axis and in rolling engagement with the grinding table, and at least one pivot lever retaining the grinding roller and having a pivot axis orientated parallel with or inclined relative to the grinding roller axis. A fixed motor is connected to the grinding roller via a drive train to transmit drive power, the drive train including a fixed drive train and a movable drive train. The fixed drive train has a drive element in contact with the movable drive train and arranged coaxially relative to the pivot axis of the pivot lever. The two drive trains may be connected to each other via two bevel wheels arranged so that the axes of the bevel wheels intersect in the pivot axis.

Abstract: The roller mill according to the invention substantially comprises a grinding table, at least one grinding roller which is in rolling engagement with the grinding table, a main drive system for driving the grinding roller and/or the grinding table and an auxiliary drive for driving the grinding table. The auxiliary drive comprises at least two linear drives for rotating the grinding table and a control device for individually controlling the linear drives in order to provide an uninterrupted rotational movement.

Abstract: The roller mill according to the invention substantially comprises at least one grinding roller and a grinding table, the grinding table having a grinding table inner space which is open in a downward direction, at least one grinding roller drive system for driving the grinding roller and a grinding table drive system for driving the grinding table. The grinding table drive system further has a gearless direct drive which is arranged in the grinding table inner space.

Abstract: The roller mill according to the invention comprises a grinding table which is arranged for rotation about a mill axis, at least one grinding roller which can be rotated about a grinding roller axis and which is in rolling engagement with the grinding table, and at least one pivot lever which is for retaining the grinding roller and which has a pivot axis, the pivot axis being orientated parallel with or inclined relative to the grinding roller axis. A fixed motor is further connected to the grinding roller via a drive train in order to transmit the drive power, the drive train comprising a drive train which is fixed in position and a drive train which is also movable with the pivot lever. The fixed drive train has a drive element which is in contact with the movable drive train and which is arranged coaxially relative to the pivot axis of the pivot lever.

Abstract: The roller mill according to the invention substantially comprises a mill housing which defines a grinding chamber, a grinding table which can rotate in the grinding chamber and at least one rotatable grinding roller which is in rolling engagement with the grinding table. A drive which is associated with the grinding roller and which has at least one gearing mechanism is further provided, at least a portion of the gearing mechanism being arranged in the grinding chamber in the region of the grinding roller and being in the form of an epicyclic gear system.

Abstract: The roller mill according to the invention substantially comprises a rotatable grinding table, at least one grinding roller which is retained rotatably on a pivot lever and which is in rolling engagement with the grinding table, with the pivot lever being arranged for pivoting about a pivot lever axis, and a drive train associated with the grinding roller in order to drive the grinding roller with a fixed motor.

Abstract: The roller mill according to the invention substantially comprises a rotatable grinding table, at least one grinding roller which is retained rotatably on a pivot lever and which is in rolling engagement with the grinding table, the pivot lever being pivotable about a pivot lever axis, and at least one drive train which is connected to the grinding roller and which has a fixed motor and a fixed gearing mechanism. The drive train further has a gearing mechanism which pivots with the pivot lever and/or the grinding roller.

Abstract: The present invention provides a process for preparing polyalkylene glycols by reacting a mixture of a mono- or polyhydric alcohol and a polyalkylene glycol prepolymer with a C2- to C4-alkylene oxide or a mixture of such alkylene oxides in the presence of a catalyst which comprises Zn3[Co(CN)6]2, the mono- or polyhydric alcohol having a molecular weight of up to 500 g/mol and containing from 1 to 20 carbon atoms and from 1 to 10 hydroxyl groups, and the polyalkylene glycol prepolymer being the addition product of a C2- to C4-alkylene oxide or of a mixture of such alkylene oxides in an amount of at least 500 g/mol to a mono- or polyhydric alcohol having from 1 to 20 carbon atoms and from 1 to 10 hydroxyl groups.

Abstract: The present invention relates to a storage-stable, phosphorus-modified epoxy resin having an epoxide value of 0.05 to 0.6 mol/100 g and comprising 5 to 25% by weight of an ester-anhydride formed from a phosphonic acid diester, phosphinic acid ester or mixture of these esters and phosphorus pentoxide, and to a process for its preparation by reaction of 95 to 75 parts by weight of an epoxy resin (A) having an epoxide value of 0.1 to 0.8 mol/100 g and 5 to 25 parts by weight of the ester-anhydride in the presence or absence of a solvent at -20 to 150.degree. C.

Abstract: The invention relates to expandable, halogen-free, flame-retardant coating compositions comprising epoxy resins, polyphosphoric esters and a curing agent, which composition comprises from 75 to 95 parts by weight of epoxy resin and from 5 to 25 parts by weight of polyphosphoric ester and wherein the overall weight ratio of epoxy resin and polyphosphoric ester to curing agent is (1.1 to 10) to 1. The invention likewise relates to a process for preparing such expandable, halogen-free coating flame-retardant, compositions comprising epoxy resins and polyphosphoric esters and a curing agent, and to their use, in particular as an intumescent coating.

Abstract: The invention relates to an expandable, halogen-free, flame-retardant coating composition comprising epoxy resins, polyphosphoric/polyphosphonic esters and a curing agent, which composition comprises from 75 to 95 parts by weight of epoxy resin and from 5 to 25 parts by weight of polyphosphoric/polyphosphonic ester and wherein the overall weight ratio of epoxy resin and polyphosphoric/polyphosphonic ester to curing agent is (1.1 to 10) to 1. The invention likewise relates to a process for preparing such coating compositions and to their use.

Abstract: The expandable, flame-retardant coating compositions comprise at leastfrom 4 to 25% by weight of a film-forming binder,from 10 to 40% by weight of an ammonium polyphosphate,from 8 to 40% by weight of at least one substance which is carbonized under the effect of heat,from 6 to 25% by weight of an expansion agent,from 0 to 5% by weight of dispersants andfrom 0 to 25% by weight of fillers. As substance which is carbonized under the effect of heat and/or as expansion agent, and as additional acid donor, these coating compositions contain ammonium salts of alkyl phosphates.

Abstract: Preparation of chlorophenylphosphanes of the formula(C.sub.6 H.sub.5).sub.n PCl.sub.3-nin which n is 1 or 2, triphenylphosphane (C.sub.6 H.sub.5).sub.3 P and phosphorus trichloride PCl.sub.3 are reacted at temperatures above 300.degree. C., for which liquid triphenylphosphane and gaseous phosphorus trichloride are introduced in a molar ratio of 1:(3 to 12) at the upper end of a vertically arranged, elongated and heated reaction zone. The reaction product discharged at the lower end of the reation zone is transferred to a residence zone charged with phosphorus pentachloride. Finally, the excess phosphorus trichloride is removed from the reaction product, via a subsequent fractionating zone, by heating the residence zone with the resultant formation of a PCl.sub.3 -depleted reaction product. The substances contained in the PCl.sub.3 -depleted reaction product are separated from one another by fractionated rectification under reduced pressure.