Abstract: Aqueous, autocrosslinking polymer dispersion binders comprising polyhydrazides and carbonyl-containing polyurethane-vinyl hybrid polymers and also, if desired, conventional additives, are useful in base coatings, aqueous coatings, adhesives and printing inks.

Abstract: Curing agents for aqueous epoxy resin dispersions obtained by reaction of an adduct (A) of at least one polyepoxide (A.sub.1) and at least one polyalkylene polyether polyol (A.sub.2), it being possible for the adduct (A) to be modified with a secondary amine (A.sub.3) if appropriate, withI. a reaction product of an amine (B) and an epoxide (C)orII. an amine (B) and subsequent reaction with an epoxide (C),the amount of amine (B) being chosen such that the H atoms on the nitrogen are present in a 2- to 10-fold excess, based on the epoxide groups in (A).

Abstract: Aqueous, autocrosslinking polymer dispersion binders comprising polyhydrazides and carbonyl-containing polyurethane-vinyl hybrid polymers and also, if desired, conventional additives, are useful in base coatings, aqueous coatings, adhesives and printing inks.

Abstract: Curing agents for aqueous epoxy resin dispersions obtained by reaction of an adduct (A) of at least one polyepoxide (A.sub.1) and at least one polyalkylene polyether polyol (A.sub.2), it being possible for the adduct (A) to be modified with a secondary amine (A.sub.3) if appropriate, withI. a reaction product of an amine (B) and an epoxide (C)orII. an amine (B) and subsequent reaction with an epoxide (C),the amount of amine (B) being chosen such that the H atoms on the nitrogen are present in a 2- to 10-fold excess, based on the epoxide groups in (A).

Abstract: A device according to the invention enables a high-precision adjustment of lenses or lens groups in a mounted high-performance lens system at any time. The lens or lens group to be adjusted is fixed in a lens mount which is held in a frictional engagement in a first mount. The fit clearance between the lens mount and first mount which is arranged in the high-performance lens system so as to be substantially virtually free of play radially is at least as great as the desired adjustment region. Piezoelectric translators are arranged in the wall region of the lens mount so as to be parallel to the optical axis and act against the contact-pressing force bringing about the frictional engagement during the adjustment process so that the force required for the displacement of the lens mount in the first mount via radially acting adjusting members is small.

Abstract: Polyol/epoxy adducts obtained by reaction of(A) an aliphatic polyol having an average molecular weight (Mw) of 200 to 2000 and(B) an epoxy compound having at least two epoxy groups per molecule and an epoxy equivalent weight of 100 to 2000,the equivalent ratio of the OH groups to the epoxy groups being 1:3.51 to 1:10, preferably 1:4 to 1:9, particularly preferably 1:45 to 1:8, and the epoxy equivalent weight of the adduct being between 150 g/eq and at least 800 g/eq, preferably between 250 g/eq and 1000 g/eq which adducts serve as nonionic emulsifiers in water-dilutable epoxy liquid resins.

Abstract: Aqueous epoxy resin dispersions containing(A) an epoxy resin which is a condensation product of one or more epoxy compound(s), of an aromatic polyol and, if used, of a modifying compound having at least two groups which are reactive with epoxides,(B) a dispersing agent in the form of a condensation product of an aliphatic polyol and an epoxy compound, the equivalent ratio of the OH groups to the epoxy groups being 1:0.8 to 1:3.5,(C) a carboxyl-containing or -releasing curing agent for the epoxy resin comprising one or more carboxyl-containing compound(s), at least one of these compounds having a functionality of at least three carboxyl groups per molecule, and(D) if desired customary additives, components (A), (B) and (C) being used in such amounts by weight that the equivalent ratio of the epoxy groups of component (A) capable of reacting to the carboxyl groups of component (B) is at least 1:0.5.

Abstract: Crosslinked polymer microparticles based on epoxy resin obtained by polymerization of aqueous dispersions (A) of compounds containing epoxide groups in the presence of up to 0.2 mol, preferably 0.02 to 0.15 mol (based on the nitrogen contained in (B)) of a nitrogen-containing organic compound (B) per epoxide equivalent and subsequent isolation which are preferably in the form of aqueous dispersions thereof, and are suitable as organic fillers, pigments, matting agents and/or reinforcing agents for binder systems and individual components thereof, paint formulations, coating and molding compositions, intermediate coatings, adhesives and the like, preferably based on water.

Abstract: A process for the preparation of aqueous epoxy resin dispersions comprising(1) 20 to 75% by weight, based on the total dispersion, of an epoxy resin constituting a condensation product ofa) epoxy compounds having at least one epoxy group per molecule and an epoxide equivalent weight of 90 to 3000 g/mol, andb) aromatic polyols;(2) 3 to 20% by weight, based on the total dispersion, of an emulsifier comprisinga) a condensation product of an aliphatic polyol and an epoxy compound having at least two epoxy groups per molecule and an epoxide equivalent weight of 90 to 3000 g/mol, the equivalent ratio of the OH groups to the epoxy groups being 1:0.85 to 1:1.

Abstract: A flat disk having differing material properties in the inner and outer regions, resulting in varying dynamic material behavior during explosion deformation and a process for making the same. In particular, the outer regions of the flat disk produced, have a greater material hardness than the central regions of the disk.

Abstract: The mouth of a metal refining vessel has a primary gas collection hood supported over it. A duct couples the hood to a gas cleaning quencher which is serially connected by a duct to a wet scrubber. A fan draws gases and suspended particulates through the system and discharges the effluent from the scrubber to a stack which burns the gas in the atmosphere. A secondary gas collection hood is supported over the first hood. The secondary hood has a duct which connects into the gas cleaning system intermediate the quencher and the scrubber. A bell damper connects the duct from the secondary hood into the intermediate duct. When the vessel is tilted away from the primary hood, the damper is opened so that gases escaping from the mouth of the vessel may be captured by the secondary hood and passed through the gas cleaning system. The secondary hood has a chain curtain which yields to allow a ladle or scrap charging box to swing over the vessel mouth when it is tilted.

Abstract: A gas collector hood is located close to the mouth of a converter vessel and has a diameter which is not much greater than the mouth of the vessel. A mixture of oxygen together with entrained powdered materials based on process requirements and a hydrocarbon fluid as cooling agent are blown through tuyeres in the bottom of the vessel and diffuse through the hot metal in the vessel. The inherently finer dust produced from the bottom-blown oxygen process requires that for proper air pollution control a non-combustion system be used to take advantage of the increased agglomerating properties of iron oxides when produced in reducing atmospheres. When blowing is initiated in this process carbon monoxide and hydrogen evolve immediately and in order to render the gases inert, air is aspirated into the gas collector hood so that an inert gas plug is formed which purges the exhaust system of combustion air.