Abstract: A process for making aluminum flake pigment by reducing aluminum to flake form in the presence of a milling agent, wherein the milling agent comprises isostearic acid, alone or together with a small amount of other, nonleafing milling agents. The product is a substantially nonleafing pigment constituted of aluminum flake particles having a surface layer of isostearic acid milling agent residue.

Abstract: Protective coatings for alloys, mild steel, and enameling iron that has high resistance to corrosive attack and superior thermomechanical properties over ordinary glass or enamel coatings is disclosed. The desired properties are imparted to the coatings by various chemical additions during the milling procedures.

Abstract: A process for the preparation of a solvent-stable, red shade copper phthalocyanine pigment composition by reacting an organic compound capable of forming the phthalocyanine ring system, benzophenone 3,3',4,4'-tetracarboxylic acid or a derivative thereof, a copper compound capable of providing the copper atom of the copper phthalocyanine molecule, a reaction catalyst, and a nitrogen source, optionally in the presence of at least one phthalocyanine compound substituted by 1 to 4 groups of a sulphonate or sulphonic acid and/or sulphonamide which may be N-substituted.

Abstract: A process for producing a pigment or dyestuff composition in the form of dustless readily-dispersible granules which comprises contacting, with agitation, an aqueous dispersion of a pigment, a protective colloid, an aliphatic or araliphatic amine which is liquid at temperatures below 100.degree. C., insoluble in water at pH values above 7, and soluble in water at pH values below 7, and an organic carrier, the pH value being first above 7, maintaining the temperature above the melting point of the amine compound, and reducing the pH to below 7 to render the amine compound soluble in water, and recovering the resulting granules.

Abstract: A stable glass for a Faraday rotation element, the glass comprising, in mole%,15 to 18% Ce.sub.2 O.sub.3,64 to 76% P.sub.2 O.sub.5,4 to 16% B.sub.2 O.sub.3,0 to 8% SiO.sub.2, and0 to 10% Al.sub.2 O.sub.3 with 2 to 12% SiO.sub.2 +Al.sub.2 O.sub.3.

Abstract: Pigment concentrates which are particularly suitable as colorants for thermosetting powder coating resins are described. The concentrates contain by weight about 35 to about 60% of organic pigments and about 30 to about 65% of certain low molecular weight, friable polymers of styrene and/or alkyl substituted styrenes or about 45 to about 90% of inorganic pigments and about 5 to about 55% of the friable polymer. A dispersing agent is optional and, if present, the weight ratio of polymer to dispersing agent is at least 1.

Abstract: A process for improving the dispersibility of inorganic and organic pigments and fillers which comprises contacting said pigments and fillers with (a) a mixture of aminoalkanols of the formulae ##STR1## wherein R.sub.1 and R.sub.2 are alkyl having 1 to 21 carbon atoms, the sum of the carbon atoms in R.sub.1 and R.sub.2 being 6 to 22, R.sub.3 is hydrogen or methyl, provided there is only one methyl group per (CH).sub.x group, R.sub.4 and R.sub.5 are the same or different and are hydrogen, alkyl having 1 to 4 carbon atoms or hydroxyalkyl having 2 to 4 carbon atoms, x is an integer of from 2 to 6 and y is 0,1,2 or 3, the R.sub.1 --CH--CH--R.sub.2 units in the aminoalkanols being of at least two different chain lengths of from 8 to 24 carbon atoms and the vicinal substituents being distributed statistically along said chain lengths, with the proviso that, if y is 0, R.sub.4 and R.sub.

Abstract: A process for improving the dispersibility of inorganic and organic pigments and fillers which comprises contacting said pigments and fillers with (a) aminoalkanols of the formulae ##STR1## wherein R.sub.1 is alkyl having 6 to 22 carbon atoms, R.sub.2 is hydrogen or methyl, provided there is only one methyl group per (CH).sub.x group, R.sub.3 and R.sub.4 are the same or different and are hydrogen, alkyl having 1 to 4 carbon atoms or hydroxyalkyl having 2 to 4 carbon atoms, x is an integer of from 2 to 6 and y is an integer of from 0 to 3, with the proviso that, if y is 0, R.sub.3 and R.sub.4 are not both hydrogen, or (b) salts, (c) alkoxylation products, and (d) quaternization products of said aminoalkanols, and recovering highly dispersible pigments and fillers.

Abstract: A chromium chromate complex, obtained by partial reduction of chromic acid in aqueous media with an organic reducing agent, is converted to pigment form by evaporating the resulting aqueous composition to dryness and sub-dividing the obtained solid mass to suitable size. The obtained pigment, with or without intimately associated extenders, incorporated in a conventional vehicle, serves as a corrosion inhibitor in metal coating compositions.

Abstract: Cores made of alumina-based ceramics, such as .beta.-alumina materials, are substantially non-reactive with directionally solidified eutectic and superalloy materials, do not cause hot cracking of the same, and are easily leachable from the cast metal.

Abstract: An improved process for preparing an organic pigment having a high tinctorial strength by heating a crude organic pigment as an aqueous suspension having a consistency suitable for being pumped, to a temperature of from 80.degree. to 300.degree. C. and for a period of from 10 seconds to 20 minutes in a continuously operating flow apparatus which is shaped as a heat exchanger provided with moving internal elements.

Abstract: A process for the production of alpha-, beta-, and gamma-copper phthalocyanine pigments by reacting an aromatic or aromatic heterocyclic ortho-dinitrile compound and copper or a copper compound capable of providing the centrol metal atom of a phthalocyanine pigment at a temperature below 100.degree. C. in the presence of a alkaline substance in a hydrophilic aliphatic organic solvent containing one or more hydroxy groups and adding as catalyst or crystal form controller or both from the beginning of the reaction:(a) for alpha-, beta- or gamma pigments, a copper phthalocyanine in conventional pigmentary form or(b) for alpha pigments, a copper phthalocyanine derivative with a limited degree of substitution.

Abstract: Method for the manufacture of ferrosilicon nitride is disclosed. The method produces ferrosilicon nitride with a silicon nitride content of 65% to 85% by weight by oxidizing the metallic iron which is present in the ferrosilicon nitride in an aqueous medium in the presence of selected oxidizing agents while forcing a mixture of air and steam through the aqueous medium.

Abstract: A sintered apatite body obtained by molding and sintering an apatite powder, Ca.sub.5 (PO.sub.4).sub.3 OH, containing 0.01 to 20% by weight of (Ca,Mg).sub.3 (PO.sub.4).sub.2. The sintered apatite body has high mechanical strength and good affinity with living tissues and cells, and is suitable as medical implant materials such as prosthetic teeth or bones.

Abstract: High purity, fine Si.sub.3 N.sub.4 powder produced by the vapor phase reaction of SiCl.sub.4 with NH.sub.3 is amorphous. The crystallization rate of the amorphous powder is enhanced by heating the powder while in intimate contact with a titanium containing material, for example, TiN codeposited with the Si.sub.3 N.sub.4 by the simultaneous reaction of TiCl.sub.4 with NH.sub.3.

Abstract: Optical glass of high refractive index and low dispersion comprises 25-40% of B.sub.2 O.sub.3 11-30% of ZnO, 28-44% of La.sub.2 O.sub.3, 1-25% of Y.sub.2 O.sub.3, 0-20% of alkaline earth metal oxides, 0-5% of SiO.sub.2, 0-5% of Al.sub.2 O.sub.3, 0-15% of PbO, 0-10% of ZrO.sub.2 and 0-10% of Ta.sub.2 O.sub.5, all percentages being by weight.

Abstract: Disclosed are phosphorus glasses containing beryllium and fluorine and Nd.sup.3+ as the active lasing species.

Abstract: A method for treating arsenic-containing waste materials for disposal in landfill sites comprises admixing an arsenic waste, Portland cement, sand, one or more water-soluble manganese or alkaline earth metal salts, and water, thereby producing a slurry similar to wet concrete, which slurry, when cured, leaves a rock-like material containing entrapped arsenic. This material may be used for landfill without danger of ground or rain waters leaching arsenic therefrom.

Abstract: A pigment which is stable in nitrocellulose and comprises at least one trisaminotriarylmethane dye and heteropolyacids based on phosphoric acid, molybdic acid or tungstic acid, the pigment containing from 0.1 to 10% by weight (based on the pigment formulation) of a compound which possesses at least one --N(CH.sub.2 --COOH).sub.2 group. The pigment may be used for the stable coloration of nitrocellulose-containing printing inks and finishes or of nitrocellulose chips.

Abstract: A high sodium oxide composition suitable for use in the manufacture of glass and fiber glass is prepared by heating a sodium carbonate ore with a silicate or other source of glass making oxides such as clay or oil shale. The product obtained is rich in sodium, calcium and magnesium oxides and contains less than 35 weight percent SiO.sub.2. It may be substituted for soda ash in a glass batch and will reduce the fuel required in glass manufacturing.