Abstract: Plastics are described which contain, in intimate contact with the pigments, boric acid in a quantity of 1 to 20% by weight, preferably 2 to 15% by weight, of the dry pigment. Also described is the process for producing said plastics, in which the usual plastic granules or powders are mixed with the above-mentioned quantities of boric acid before, during or after addition of the pigment, and the boric acid is brought into intimate contact with the pigment before further processing, of the particulate plastic is mixed with the pigment containing the above mentioned quantities of boric acid before being subjected to further processing under thermal stress.

Abstract: The present invention provides anticorrosive pigments on the basis of tertiary alkaline-earth aluminum phosphates, particularly those where the numerical atomic ratio x:y:z of formula AE.sub.x Al.sub.y (PO.sub.4).sub.z of alkaline earth to aluminum to phosphorus or phosphate is 50-70% to 5-30% to 20-50%. It also provides a process for their production in which an alkaline-earth compound and aluminum compound sufficiently soluble with phosphoric acid are reacted with phosphoric acid, the precipitated pigment is filtered off as usual and dried, optionally calcined and optionally ground.

Abstract: The invention shows anticorrosive pigments on the basis of alkaline earth hydrogen phosphates, which are distinguished in that they contain from 20 mole-% to 60 mole-% of alkaline earth carbonate, the balance being alkaline earth hydrogen phosphate of the particular like alkaline earth metal, as well as a process of producing them in that alkaline earth carbonate and phosphoric acid are in per se known manner reacted with one another at the desired molar ratio, as well as the use of the anticorrosive pigments for corrosion protection of aluminum substrates, particularly for preventing filiform corrosion in aircraft coatings.

Abstract: Corrosion inhibiting pigments on the basis of zinc silicate are produced from 35-65% by weight of ZnO, 15-35% by weight of SiO.sub.2, 5-20% by weight of B.sub.2 O.sub.3, and 1-20% by weight of WO.sub.3 which can be entirely or partly substituted by, MoO.sub.3 and/or SnO.sub.2 wherein the amount of zinc silicate, boron oxide and, if necessary, the other metal oxides or their hydrates singly or in a combination thereof is such that the entire combination with the zinc silicate and the boron oxide contains at least one of the oxides WO.sub.3, MoO.sub.3 and/or SnO.sub.2 in amounts bringing the balance to 100%. The pigments can be manufactured by dry mixing of the components, melting for 1-3 hours at 1100.degree. C.-1400.degree. C. and subsequent grinding to desired fineness.

Abstract: The invention relates to corrosion-inhibiting pigments containing metallic oxides, phosphates and/or molybdates, wherein the metals are zinc, aluminum, iron, barium, strontium, calcium, magnesium and titanium, singly or in combination, wherein the pigments also contain 0.03-2% by weight of soluble sodium dichromate or equivalent amounts of potassium dichromate, ammonium dichromate or equivalent amounts of respective chromates or chromic acid, singly or in their mixture. The invention also relates to a process for the manufacture of the pigments by thorough homogenization of the chromate components with the pigments, and to the use of the pigments in primers for ferrous and non-ferrous metallic substrates.

Abstract: Permanently non-dusting pigment and dye preparations, which contain as dedusting agents,(a) a surface-active substance in an amount of from 0.

Abstract: The dust producing properties of a pigment or dye are measured under conditions which close approximate those during handling. A vessel with baffles having pigment or dye therein is rotated for a specified time while air is drawn through the rotating vessel by a specified amount of vacuum applied downstream of the vessel. The baffles disturb the pigment or dye in the vessel, creating dust particles which are entrained in an airstream created by the vacuum. Larger particles trapped in this vacuum are removed by a separator, while the dust particles are trapped in the airstream are trapped by a filter. The dusting properties of the pigment or dye in the vessel may then be determined by weighing the filter.

Abstract: A method and an apparatus for the production of industrial lead oxide involving mixing molten lead and air in a reactor. A particularly advantageous, having a desired particle size can be obtained with a PbO content of considerably more than 99%. The lead flow is introduced at a constant and even rate and the air flow is altered very slightly in order to maintain the pre-determined reaction temperature having fluctuations of a maximum of .+-.5.degree. C.The constant and steady infeed of the lead flow is achieved by using an apparatus according to the invention. The apparatus, which is situated above the reactor, includes a supply vessel charged with molten lead from a melt container, the supply vessel having an exchangeable nozzle which is provided with a control-operated cleaning pin. The nozzle extends into a reaction space and the supply vessel is connected to the melt container via a feed line and an overflow.

Abstract: In a process and a device for manufacturing partially oxidized lead dust from lead pieces, the natural pile of dissociated coarse and fine material formed in a rotating drum is mechanically disturbed by radially extending guide plates in the interior of a drum which plates are arranged in pairs and displaced toward each other by 180.degree. in the direction of the circumference of the drum and the individual plates of each pair of plates are spaced axially apart, by which arrangement the efficiency of the process and the product quality are greatly improved.

Abstract: Aluminum zinc phosphate hydrates or basic aluminum zinc phosphate hydrates are manufactured by reacting 1 mole of aluminum hydrogen phosphate with from 2.4 to 4 moles of zinc oxide, if necessary with the addition of up to 0.4 moles of alkali aluminate or the equivalent quantity of alkali hydroxide. A 50% by weight acidic aluminum hydrogen phosphate solution is preferably used for the reaction which is carried out at an elevated temperature in the range from 30.degree. to 80.degree. C. The aluminum zinc phosphate hydrates produced by the method are useful anti-corrosion pigments for use in paints.