Abstract: The invention relates to an aqueous colorant preparation for coloring thermoplastic plastics.

Abstract: A method and device are provided for directly screwing together at least two components using a self-drilling and tapping screw which has a head and a shank formed onto the head with a self-tapping thread section and a hole-drilling section for flow drilling. The components are held pressed against one another by a holding down clamp while the screw is screwed in. The holding down force, with which the holding down clamp presses the components against one another while the screw is screwed in, is varied.

Abstract: The invention relates to an aqueous colorant preparation for coloring thermoplastic plastics.

Abstract: A self-drilling and tapping screw for directly screwing together components includes a head and a shank integrally formed with the head. The shank has a self-tapping thread section and, in front thereof, a punch-forming section for flow punch forming. The shank further has at least one cutting edge with a chip removal function, which is essentially located in front of the self-tapping thread section, wherein on the one hand this cutting edge makes it possible to generate a clearance hole into at least one of the components by turning the screw, while on the other hand not impairing a flow punch forming in another component. A component assembly may be joined together by use of at least one such self-drilling and tapping screw.

Abstract: A method and device are provided for directly screwing together at least two components using a self-drilling and tapping screw which has a head and a shank formed onto the head with a self-tapping thread section and a hole-drilling section for flow drilling. The components are held pressed against one another by a holding down clamp while the screw is screwed in. The holding down force, with which the holding down clamp presses the components against one another while the screw is screwed in, is varied.

Abstract: The invention relates to an aqueous colorant preparation for coloring thermoplastic plastics.

Abstract: A process for the production of polyurethane foams by reacting a reaction mixture consisting essentially ofa) a polyisocyanate component, withb) a polyol component free from salt groups, in the presence ofc) at least one blowing agent,d) salts of ester-functional .alpha.,.beta.-unsaturated carboxylic acids and, optionally,e) other auxiliaries and additives typically used in polyurethane chemistry.Component d) the salts of ester-functional .alpha.,.beta.-unsaturated carboxylic acids are the reaction products of (i) monohydric or polyhydric alcohols, with (ii) unsaturated dicarboxylic acids or unsaturated dicarboxylic anhydrides, which contain on a statistical average at least one alkali metal carboxylate group and at most 0.5 alcoholic hydroxyl groups per molecule. The present invention also relates to the composites produced by back-foaming of a plastic film as a surface layer wherein the foam is produced by the process described above.