Abstract: A process for improving the adhesion of a lubricant to, and the distribution on, the surface of a strip of aluminum or aluminum alloy which is cold rolled between two work rolls, said cold rolled strip being coated with lubricant for the purpose of subsequent shape-forming, is such that the surface of at least one work roll exhibits a roughness pattern (10), which is comprised of at least two line patterns (14,18) that cross each other, whereby each of these line patterns is characterised by a plurality of parallel rills (12,16).

Abstract: A process for joining components made of metal, in particular aluminum and aluminum alloys, is such that a thermally-curable (hardenable) adhesive is deposited between the close-fitting surfaces of the components that are to be joined, and one of the outer surfaces neighboring the said close-fitting surface of one of the components is radiated with infra-red radiation in order to cure the adhesive. At least the outer surface to be radiated is provided with a pattern that roughens that surface. By reducing the reflectivity of the roughened surface the capacity to absorb infra-red radiation is increased. A preferred application for the process is in the adhesive bonding of shaped parts, especially body sheet in automobile manufacture.

Abstract: A process for joining components made of metal, in particular aluminum and aluminum alloys, is such that a thermally-curable (hardenable) adhesive is deposited between the close-fitting surfaces of the components that are to be joined, and one of the outer surfaces neighboring the said close-fitting surface of one of the components is radiated with infra-red radiation in order to cure the adhesive. At least the outer surface to be radiated is provided with a pattern that roughens that surface. By reducing the reflectivity of the roughened surface the capacity to absorb infrared radiation is increased. A preferred application for the process is in the adhesive bonding of shaped parts, especially body sheet in automobile manufacture.

Abstract: An aluminum alloy containing 0.15-0.50% Si, 0.3-0.8%, Fe, 0.05-0.25% Cu, 0.5-1.0% Mn, 2.5-3.5% Mg and up to 0.20% Ti is cast as a 5-10 mm thick strip using a roll-type strip casting machine, and cold rolled to a final thickness of 0.20-0.40 mm. The strip is suitable for manufacture into can lids having high strength and formability requirements.

Abstract: A process for the preparation of a rolled aluminum product, containing iron as the predominant alloy element, which has a grain size of less than 10 .mu.m after annealing to at least 250.degree. C., in which an alloy consisting of 0.8 to 1.5% iron, up to 0.5% by weight of each of Si and Mn, the sum of Si and Mn being between 0.2 and 0.8%, up to 0.3% by weight of any other component, the total of other components being no more than 0.8% by weight, and the remainder being aluminum, is casted at a solidification rate of 2.5 to 25 cm/min, the hot plate is cooled to less than 120.degree. C. at a rate of less than 0.5 K/sec and is then cold rolled with a thickness decrease of at least 75% without intermediate annealing, and the final annealing temperature does not exceed 380.degree. C.

Abstract: The invention provides novel monoazo compounds of the formula I ##STR1## wherein X is hydrogen or halogen, R is hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.1 is C.sub.1 -C.sub.8 alkyl, cycloalkyl or ##STR2## wherein the phenyl radical can be monosulfonated, and R.sub.2 is C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by a sulfo group, or is cycloalkyl, with the proviso that either R.sub.1 or R.sub.2 contains a sulfo group.The invention also provides a process for the production of the compounds of the formula I, as well as an intermediate of the formula IIb ##STR3## The novel monoazo compounds can be used as dyes for dyeing and printing textile material, especially wool and polyamide.

Abstract: A novel improved process for separating mixtures of 3- and 4-nitrophthalic acid is described. The said process comprises treating a mixture of 3- and 4-nitrophthalic acid, which mixture is free from inorganic acid residues, in an aqueous-organic medium containing 1-20 percent by volume of water, at a temperature of between 20.degree. and 100.degree. C., stepwise with a base capable of forming salts of 3- and 4-nitrophthalic acid, which salts are essentially insoluble in the reaction medium, the treatment being carried out by adding base until a pH value of about 2.8 is obtained, separating the precipitating product consisting mainly of a 3-nitrophthalic acid mono-salt, subsequently precipitating, by the addition of further base, a product consisting principally of a 4-nitrophthalic acid salt, and finally converting the resulting nitrophthalic acid salts separately into the corresponding free acids, and optionally purifying these.

Abstract: A process for producing polyamide-polyamide-acid copolymers having an inherent viscosity of from 0.1 to 2.5 and cyclized derivatives thereof is disclosed, which process comprises reacting a polyamide-acid block having an average molecular weight of from 750 to 20,000 with a dicarboxylic acid dichloride and a diamine. The resultant polyamide-polyamide-acid copolymers are distinguished by good processing characteristics as well as good electrical, thermal and/or mechanical properties.