摘要:
Narrow-band electrical pulses which are delayed with respect to a first direct pulse produced are generated by a method in which space charges are pulsed in an electric field in a dielectric.
摘要:
A transport system, in particular an airport luggage transport system and a controller for the transport system are described. The transport system transports items to a predetermined destination on predefined transport routes via several branching locations. A master controller sets for each transported item a destination and a transport route, which are processed by one or more slave controllers. Each transported item is given an identification number that is identified by the slave controller. The master controller provides to the slave controller the destination associated with each identification number and associates with each destination at the branching locations a forwarding direction. Forwarding is processed by the slave controller without an interrogation of the master controller, based on the preset association at the branching locations.
摘要:
A workbench, in particular for welding and structural steel work, includes a frame assembly having opposing axial ends and including a pair of traverses respectively disposed at the axial ends, and a pair of spaced substantially parallel platforms for forming working surfaces for installation and placement of workpieces, with the working surfaces being expandable in all directions by retractable or detachably secured elements. One of the platforms is stationarily fixed on the traverses and the other one of the platforms is movably supported on the traverses for displacement in direction of the stationary platform. Extending laterally of the stationary platform is a support unit for attachment of accessories and including at least one support and a guide bar secured to the frame assembly and configured of polyhedral cross section for guiding the support in longitudinal direction.
摘要:
Cleaned or chemically pretreated metal surfaces are modified using aqueous solutions of amino-containing organic polymers, the metal surfaces thus modified being particularly suitable for coating by cathodic electrodeposition.
摘要:
A heat curable coating composition, particular for cathodic electrocoating, comprises(A) from 50 to 95% by weight of a chain or step growth polymerization product having functional groups and(B) from 50 to 5% by weight of a mixture of polymethylenepolyphenyl isocyanates which contains less than 25% of diphenylmethane diisocyanates.
摘要:
Polymeric reaction products are obtained by reactingI) prepolymers obtained fromA) polyoxyalkylenes which have an average molecular weight M.sub.n of from 140 to 10,000 and contain on average from 1.5 to 3.0a.sub.1) primary or secondary amino groups ora.sub.2) epoxy groupsper molecule andB) polymers which are based on conjugated dienes, have an average molecular weight M.sub.n of from 250 to 50,000 and contain on average from 1.5 to 3.0b.sub.1) primary or secondary amino groups orb.sub.2) epoxy groupsper molecule, the components (a.sub.1) and (b.sub.2) or (a.sub.2) and (b.sub.1) being reacted with one another so that from at least an amino equivalent excess to 3 amino equivalents of component (a.sub.1) or (b.sub.1) are present per epoxide equivalent of component (a.sub.2) or (b.sub.2),withII) at least one compound which forms free radicals.
摘要:
Synthetic resins are based on products which are obtainable by reactingA) epoxy-carrying resins based ona.sub.1) polyhydric phenols anda.sub.2) at least one compound selected from the group consisting of.alpha..sub.1) polyoxyalkylenepolyols,.alpha..sub.2) polyoxyalkylenepolyepoxides,.alpha..sub.3) polyoxyalkylenepolyamines and.alpha..sub.4) polyhydric aliphatic alcohols and,if desired,a.sub.3) phenolic compounds which react monofunctionally toward epoxides,B) monocarboxylic acids of 5 to 30 carbon atoms,C) amines which contain at least one primary and one tertiary amino group andD) formaldehyde-donating compounds.
摘要:
These photopolymerizable laminating materials consist of at least one film-forming polymer as a binder, at least one organic compound which is compatible with the binder, has at least two double bonds capable of addition polymerization and may be partially replaced by an organic compound having only one double bond capable of addition polymerization, a photoinitiator or photoinitiator system and an adhesion promoter, with or without conventional additives and assistants, the adhesion promoter used being a tricyclic heteroaromatic compound which is soluble in aqueous alkaline solutions.The said laminating materials are suitable for the production of printed circuits.
摘要:
The invention relates to a radiation-sensitive mixture essentially consisting of(a) a water-insoluble binder or binder mixture which is soluble in aqueous alkaline solutions,(b) a compound which upon irradiation forms a strong acid and(c) one or more organic compounds which inhibit the solubility of (a) in aqueous alkaline solutions,where the organic compound (c) is a malonic acid ester.This radiation-sensitive mixture may be used to prepare photoresists.
摘要:
Mixtures which can be crosslinked by photopolymerization and are based on binders, photopolymerizable monomers which are compatible with these, photoinitiators and thermal polymerization inhibitors contain, as the binder, polymers of the formula I ##STR1## where Pol is a radical of a block copolymer prepared by sequential anionic polymerization of conjugated dienes and vinyl aromatics,R.sup.1 is a vicinal alkanediyl group,R.sup.2 is a divalent hydrocarbon group of 2 to 20 carbon atoms,X.sup.- is an acid anion,M is a metal cation, a metal cation complex or cation of an amine, anda and n are each an integer from 1 to 10.