Abstract: The invention relates to a process for purifying at least one isocyanate selected from the group consisting of aliphatic, cycloaliphatic, araliphatic isocyanates and mixtures thereof, to a process for producing at least one isocyanate selected from the group consisting of aliphatic, cycloaliphatic, araliphatic isocyanates and mixtures thereof, to the isocyanate obtainable by this process, to a polyurethane constructed from at least one such isocyanate, to the use of this isocyanate and to an optical component containing at least one polyurethane according to the invention.

Abstract: The invention relates to a method for producing flexible tube bodies (18) for packaging tubes from a film substrate (1) which has a print, preferably on an outer side (2), and which has or consists of at least one weldable plastic layer and which comprises a first longitudinal edge side (8), which extends in a longitudinal direction, and a second longitudinal edge side (8?) parallel thereto and spaced apart therefrom, wherein the film substrate (1) is shaped by shaping means (23) to form a tube, and the two longitudinal edge sides (8, 8?) are in particular welded to one another with the formation of a longitudinal weld seam, wherein a strip (12) is arranged, in the region of the abutment point and/or of the longitudinal weld seam, in the interior (17) of the film substrate (1) shaped to form the tube and is connected, in particular welded, to the longitudinal edge sides (8, 8?) at least in certain regions or portions.

Abstract: The invention relates to a welding device (1) for producing tubular bodies by the edge-side welding of two substrate edges (2, 3), in particular two laminate edges, said welding device having a continuous, circulating first contact belt (5) for coming into contact with the substrate (4), and an energy source (12, 13) for providing welding energy. According to the invention, the first contact belt (5) has a seamless polyimide contact surface (35) for coming into contact with the substrate (4).

Abstract: The invention relates to a welding device (1) for producing tubular bodies by the edge-side welding of two substrate edges (2, 3), in particular two laminate edges, said welding device having a continuous, circulating first contact belt (5) for coming into contact with the substrate (4), and an energy source (12, 13) for providing welding energy. According to the invention, the first contact belt (5) has a seamless polyimide contact surface (35) for coming into contact with the substrate (4).

Abstract: A thermal analysis device comprising a replaceable sensor that can be contacted via a contact element of an electrical contacting means, a heating element and a cooling element. The contact element(s) is thermally connected with the heating element and can be heated essentially independently of the operating state of the cooling element even when no sensor is mounted to the device.

Abstract: A thermal analysis device comprising a replaceable sensor that can be contacted via a contact element of an electrical contacting means, a heating element and a cooling element. The contact element(s) is thermally connected with the heating element and can be heated essentially independently of the operating state of the cooling element even when no sensor is mounted to the device.

Abstract: Heatable filter plate comprising two interconnected corrugated elements forming a cavity for the flow of a temperature controlled medium, filter press comprising said filter plate and diaphragm-filter plates in an alternating manner, and method for drying filter cakes in said filter press.

Abstract: The invention relates to a deviation ring for paste comprising an annular rebound wall (2) for a self-distributing centrifuge (1). The invention also relates to a corresponding self-distributing centrifuge (1). In the deviation ring, the angle of incidence ? of the tangents of the rebound wall (2) of the deviation ring (4), opposite the distribution slit (3) of the centrifuge (1), in relation to the horizontal, is between 3 and 60° over the entire opening width of the distribution slit (3).

Abstract: Method for separating blood plasma particles from a blood plasma suspension in a self-discharging centrifuge having two or more discharge slits and axially stacked baffle plates, in which the blood plasma particles are separated from the liquid phase by centrifuging and removal of the liquid phase, suctioning off liquid remaining in the drum after separation of the blood plasma particles and discharging the sediment of solid blood plasma particles from the drum by centrifugal force into a collecting container underneath the drum, the drum and the blood plasma sediment being cooled during one or more of the process steps.

Abstract: In a dynamic mechanical analysis, a test specimen is coupled to an excitation device by a holder device. An excitation force made up of a static pre-tensioning force component and a time-variable force component is applied to the test specimen, and a deformation of the test specimen is measured by one or more displacement sensors. In a test phase an excitation force is applied to the test specimen, while at least one decision parameter is determined. The decision parameter is indicative of a degree of slack in the coupling of the test specimen. Based on the comparison between the decision parameter and at least one reference value it is determined whether or not the test specimen is coupled to the excitation device in a completely slack-free state, so that any measured physical values will not be subjected to errors caused by an insufficient amount of the pre-tensioning force.

Abstract: The invention provides an improved process for the preparation of double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, in which aqueous solutions of a metal salt and a metal cyanide salt are first reacted in the presence of an organic complexing ligand and optionally one or more further complex-forming components to form a DMC catalyst dispersion, this dispersion is then filtered, the filter cake is subsequently washed with one or more aqueous or non-aqueous solutions of the organic complexing ligand and optionally one or more further complex-forming components by a filter cake washing and the washed filter cake is finally dried, after an optional pressing out or mechanical removal of moisture.

Abstract: Method for the separation of blood plasma particles from the fluid phase of a blood plasma suspension using a self-discharging centrifuge, the drum of which is provided with axially stacked baffle plates.

Abstract: The invention provides an improved process for the preparation of double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, in which aqueous solutions of a metal salt and a metal cyanide salt are first reacted in the presence of an organic complexing ligand and optionally one or more further complex-forming components to form a DMC catalyst dispersion, this dispersion is then filtered, the filter cake is subsequently washed with one or more aqueous or non-aqueous solutions of the organic complexing ligand and optionally one or more further complex-forming components by a filter cake washing and the washed filter cake is finally dried, after an optional pressing out or mechanical removal of moisture.

Abstract: The invention relates to a deviation ring for paste comprising an annular rebound wall (2) for a self-distributing centrifuge (1). The invention also relates to a corresponding self-distributing centrifuge (1). In the deviation ring, the angle of incidence ? of the tangents of the rebound wall (2) of the deviation ring (4), opposite the distribution slit (3) of the centrifuge (1), in relation to the horizontal, is between 3 and 60° over the entire opening width of the distribution slit (3).

Abstract: In a dynamic mechanical analysis, a test specimen (2) is coupled to an excitation device (4) by means of a holder device (3). The excitation device (4) applies an excitation force comprised of a static pre-tensioning force component and a time-variable force component to the test specimen, and a deformation of the test specimen (2) is measured by means of one or more displacement sensors (5).

Abstract: The invention provides an improved process for the preparation of double metal cyanide (DMC) catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, in which aqueous solutions of a metal salt and a metal cyanide salt are first reacted in the presence of an organic complexing ligand and optionally one or more further complex-forming components to form a DMC catalyst dispersion, this dispersion is then filtered, the filter cake is subsequently washed with one or more aqueous or non-aqueous solutions of the organic complexing ligand and optionally one or more further complex-forming components by a filter cake washing and the washed filter cake is finally dried, after an optional pressing out or mechanical removal of moisture.