摘要:
Copolymers which contain a) from 2 to 50 mol % of vinyl alkyl ethers having 3 to 30 carbon atoms in the molecule, b) from 10 to 88 mol % of monoethylenically unsaturated dicarboxylic anhydrides and c) from 10 to 88 mol % of dialkyl esters of monoethylenically unsaturated dicarboxylic acids as typical monomer units in polymerized form are prepared by copolymerizing the monomers a), b) and c) at from 40.degree. to 180.degree. C. in the presence of free radical initiators and are used as film-forming resins in hair sprays and, in the form of the alkali metal, ammonium or alkaline earth metal salts, as thickeners for aqueous systems, such as cosmetic and pharmaceutical formulations, textile print pastes, liquid detergents and cleaning agents.
摘要:
A curved guide rail for passenger and material transportation systems in which sheet-metal plates (3), wedged against one another, are arranged in a row on a prestressed rope (2) and the spaces in-between are bridged by an overlapping tooth construction (5), so that the guide rail can be curved as desired prior to being braced.
摘要:
A robot arm consisting of an upper arm link and a lower arm link which are interconnected by a uniaxial joint. The upper arm link is connected with a structure via a universal joint. In order to attain a weight balance, a bellcrank level is placed on the upper arm link, on whose one lever arm an upwardly directed equalizing force acts and whose other lever arm is connected to the lower arm link. If both arm links are in alignment with one another, then the point of application of force on the one lever arm has its greatest distance to the universal joint. If, on the other hand, the lower arm link is swung out of its alignment with the upper arm link, then the distance between the point of application of force and the universal joint is decreased.
摘要:
Disclosed herein is a process for producing dry compositions containing thiocyanic acid and hexamethylene-tetramine wherein hexamethylene-tetramine is reacted with an alkali or alkaline earth metal thiocyanate in the aqueous phase in the presence of acid, and wherein the aqueous reaction product solution, without isolation of the reaction product, is combined with an inert carrier substance and dried.
摘要:
The device includes a multipart hand element, movable about plural axes of rotation, secured on a multipart arm element, also movable about plural axes of rotation, and also includes a programming device which can be programmed by following a program track to be covered, as well as drives respective to each axis of rotation operable to displace the parts about the associated axes. A manually operable multipart framework is mounted on the hand-arm unit to extend parallel to the unit for limited displacement relative thereto. A number of switches equal to the number of axes of rotation, and each respective to a single axis, are operable to activate and deactivate the associated drives. The hand element has a terminal part for mounting either a track guide or a tool adapted to follow mechanically the program track. At least a part of the framework is displaceable relative to the unit during such mechanical following, and the switches control the associated drives responsive to such relative displacement of parts of the framework. Respective displacement pickups are operatively associated with each axis of rotation to feed the track program into the programming device responsive to relative displacement of the parts of the units about the associated axis. The coupling elements between the framework and the parts of the unit preferably comprise rotatable springs yielding to a torsional load in the direction of rotation and each spring carries one-half of a switch for turning relative to the other half of the switch, the other half being secured on the respective part of the unit.