Abstract: A polymer essentially of ether linked repeating units--PhCOPhPh-- I--PhSO.sub.2 PhPhSO.sub.2 Ph and II--Ar-- IIIwhere Ph is para-phenylene and Ar is a divalent aromatic group selected from phenylene and groups containing 2 to 6 phenylene radicals linked together by means of one or more links selected from the direct link, aliphatic substituted methylene, CO and SO.sub.2, provided that such SO.sub.2 --linked unit is different from unit II, unit I being present at at least 60% molar, the mutual proportion of units II and III being in the range 55:45 to 45:55 and the molar proportion of any other units being at most 20% on the total units present, said polymer having an inherent viscosity of at least 0.6.

Abstract: This invention relates to novel copolymers derived from diphenyl ether, terephthalic acid derivative and a third monomer of the formula ##STR1## where n=1 or 2. The copolymers can be prepared by Friedel-Crafts polymerization. Preferred copolymers are derived from diphenyl ether, terephthaloyl chloride, and 1,4-diphenoxybenzene.

Abstract: Thermotropic, fully-aromatic polyesters having a high content of 3,4'-benzophenonedicarboxylic acid radicals exhibit a combination, hitherto unknown, of good processability, high deflection temperature under load and very high strength and stiffness.

Abstract: The present invention relates to a process for the recovery of mineral values from ores containing such wherein at least part of the mineral values is present as a refractory mineral complex. A fluid bed reactor is utilized to simultaneously solubilize the mineral values not present as the refractory complex and to separate the refractory complex from the ore.

Abstract: A process for producing storage-stable solutions of pyrocarbonic acid dialkyl esters in organic liquids inert to these esters comprising adding certain carbonyl compounds, sulfonyl compounds and/or thiourea to these pyrocarbonic acid dialkyl ester solutions. Also the use of these carbonyl compounds, sulfonyl compounds and/or thiourea for producing stabilized polyisocyanate preparations suitable for the production of polyurethane foams.

Abstract: Bismaleimides of the formula ##STR1## wherein R.sub.1 and R.sub.2 each independently is H, C.sub.1-4 -alkyl, C.sub.1-4 -alkoxy, C1 or Br, orR.sub.1 and R.sub.2 together form a fused 6-membered hydrocarbon aromatic ring,with the proviso that R.sub.1 and R.sub.2 are not t-butyl or t-butoxy;X is O, S or Se;n is 1-3; andthe alkylene bridging group, optionally, is substituted by 1-3 methyl groups or by fluorine,form polybismaleimide resins which have valuable physical properties.Uniquely, these compounds permit extended cure times, i.e., they remain fluid for a time sufficient to permit the formation of a homogeneous melt prior to curing.

Abstract: A water and oil absorbant concrete cleaning composition is disclosed comprising shreds of a hydrophilic, open-celled, solids-loaded polyurethane foam. Methods are also disclosed to bind the solids to the cellular foam matrix.

Abstract: A plasticizer blend for polyvinyl butyral (PVB) comprising a monoester of a glycol and a C.sub.16 to C.sub.20 unsaturated fatty acid having a hydroxyl group attached to the acid molecule and a multiester of an alcohol having 2 to 4 hydroxyl groups and said unsaturated fatty acid, the monoester being present in the blend on a weight basis in an amount equal to or greater than the multiester. The low temperature penetration resistance and adhesion properties of PVB sheet plasticized with such blend is improved without significant loss in its resistance to stress cracking polycarbonate or polyacrylate in contact therewith in a laminated glass assembly.

Abstract: A compound of the formula: ##STR1## wherein R is an isoproyl group or an n-amyloxycarbonylmethyl group, useful as a herbicide, is effectively produced by reacting a compound of the formula: ##STR2## wherein R is as defined above, with sulfuryl chloride or chlorine in a solvent in the presence of a dehydrohalogenating agent.

Abstract: Fluorogenic indicator compounds responsive to the presence of hydrogen peroxide and methods and test compositions for determining hydrogen peroxide in a test sample. Preferred indicator compounds are 3,4-dihydrocoumarin derivatives and 3,4-dihydro-2-quinolone derivatives, especially those having a dialkylamino group at the 7-position. Such particularly preferred compounds are of the formula: ##STR1## wherein R.sup.1 is hydrogen, cyano, or --COOR.sup.6, --CONHR.sup.6 or --CON(R.sup.6).sub.2 where R.sup.6 is hydrogen, alkyl, alkenyl, or aryl; R.sup.3 and R.sup.4 are lower alkyl; and Y is .dbd.O or .dbd.N--R.sup.5 where R.sup.5 is hydrogen or lower alkyl. The indicator compounds yield highly fluorescent products upon oxidation by hydrogen peroxide in the presence of a peroxidatively active substance and are useful in analytical systems which generate hydrogen peroxide in response to an analyte under determination in a test sample.

Abstract: A process for preparing a predominately closed cell foam having an improved load bearing resiliency together with the improved polyurethane foam product, the process comprising co-reacting a fluid high-solids polymer/polyol and an organic polyisocyanate in the presence of an organo-tin catalyst, a tertiary amine catalyst, a blowing agent, a silicone-oxyalkylene surfactant and a critical amount of a filled diorganosilicone oil anti-foaming agent.

Abstract: A method of producing surface-treated barium sulfate is disclosed which has an improved dispersibility in resins and coating compositions. The method comprises adding an aqueous solution of an alkali silicate to an aqueous slurry of barium sulfate which contains barium ion in excess to deposit barium silicate on the surface of barium sulfate, and then adding to the slurry a mineral acid to decompose the barium silicate to hydrous silica. The thus surface-treated barium sulfate may be further coated with hydrous metal oxides such as alumina or with a silane coupling agent so as to have a more improved dispersibility.

Abstract: An improved aqueous slurry process for preparing reinforced polymeric composites in the absence of a flocculant comprising the steps of forming an alkaline aqueous slurry comprising a reinforcing material, a heat fusible organic polymer and a binder comprising a salt of an ethylene acrylic acid copolymer having an acrylic acid content from about 12 to about 30 percent by weight copolymer solids and adjusting the pH value of the slurry such that the binder is destabilized to coagulate the slurry. A product formed by the improved process is also provided.

Abstract: Novel solvent-based thermosetting composition comprising (a) hydroxy functional epoxy ester resin of number average molecular weight (Mn) between about 1,000 and about 5,000, comprising the reaction product of diepoxide with diphenol, dicarboxylic acid and acid component comprising hydroxy functional acid and optionally further comprising fatty acid; and (b) polyfunctional, hydroxy-reactive crosslinking agent, for example, aminoplast crosslinking agent or blocked polyisocyanate crosslinking agent comprising isocyanate groups blocked by reaction with an active hydrogen bearing blocking agent. Coating composition may be formulated as primer sprayable with conventional spraying equipment.

Abstract: A reinforced, fire retardant, polyamide composition containing(a) at least 35% by weight of a fibre-forming polyamide,(b) 15 to 30%, by weight of glass fibres or particulate fillers,(c) 15 to 30%, by weight of melamine demi-sulphate,(d) at least 2.5%, by weight of a halogenated compound selected from the condensation product of 2 moles chlorocylopentadiene and 1 mole of 1,5-cyclooctadiene, brominated polystyrene, brominated polyphenylene oxide or a brominated epoxy resin, and(e) a synergist selected from at least one of zinc borate, zinc oxide and mixtures of antimony oxide and zinc borate, wherein the concentration of oxide present is between 0 and 5%, the concentration of zinc borate is between 0 and 25%, preferably between 2 and 15% by weight and the total weight of synergist is at least 1% by weight and wherein the weight percentages of the constituents total 100%.

Abstract: The invention relates to a self-crosslinking heat-curable binder, in particular for electropaints, which is based on an organic synthetic resin which contains primary and/or secondary and, if desired, also tertiary amino groups and esterified carboxyl groups and is water-dilutable due to partial or complete neutralization with acids. The esterified carboxyl groups are activated in the alcohol component by a substituent which induces a negative inductive effect.

Abstract: A chemically curable dental restorative material is provided comprising a two-component paste-paste system wherein:(i) a first initiator-containing paste system comprises from about 15 to 40% by weight of a polymerizable methacrylic ester monomeric system comprising a cross-linking methacrylate monomer, at least one co-monomeric methacrylate diluent and a free radical-generating catalyst, and from about 60 to 85% by weight of an inorganic filler prepared by wet milling, surface etching milling and a silanizing milling; and(ii) a second accelerator-containing paste system comprises from about 15 to 31% by weight of a polymerizable methacrylic ester monomeric system comprising a cross-linking methacrylate monomer, at least one co-monomeric methacrylate diluent and an inorganic amine accelerator and from 69 to 85% by weight of an inorganic filler prepared by wet milling, surface etching milling and a silanizing milling;said first and second paste systems being admixed in substantially equal proportions to form t

Abstract: Process for the production of 4-substituted acetoacetic acid derivatives. An acetoacetic acid derivative having the formula: ##STR1## wherein R is alkoxy having 1 to 6 C atoms, phenoxy, --NR'.sub.2, wherein R' is alkyl having 1 to 6 C atoms or aryl, or NR'.sub.2, which is azetidine, pyrrolidine or piperidine, is treated with a secondary amine at an elevated temperature and in the presence of an organic solvent. The water formed is separated. The intermediate is converted into the corresponding 3-enamine carboxylic acid derivative. The derivative is converted by treatment with sodium amide in liquid ammonia into the corresponding sodium salt. The sodium salt is converted by treatment with a halogen compound having the formula R.sub.1 CH.sub.2 X or R.sub.1 R.sub.2 CHX, wherein R.sub.1 and R.sub.2 each are alkyl, alkenyl, alkinyl or aryl and X is chlorine, bromine or iodide, into the corresponding 4-substituted enamino derivative. The derivative is hydrolyzed into the 4-substituted acetoacetic acid derivative.

Abstract: A method of removing aqueously soluble salt by-products produced by the treatment of raw titanium dioxide particles to add a finish thereto. The finished titanium dioxide particles with the salt are subjected to demineralization with mixed bed ion exchange resins to produce finished titanium dioxide particles substantially free of salt and salt forms of ion exchange resins. The finished titanium dioxide particles are recovered and the salt forms of ion exchange resins are regenerated to produce recoverable salt and reusable resins.

Abstract: The invention relates to a simplified, economic process for the production of polyamines by the alkaline hydrolysis of compounds containing terminal aromatic and/or aliphatic isocyanate groups (including modified isocyanates or NCO-prepolymers and semi-prepolymers with NCO-contents of from 0.5 to 40% by weight), with strong aqueous bases, direct isolation of the polyamines from the carbamate stage being possible by thermal carbamate decomposition and/or solvent extraction.The invention also relates to the use of the aromatic and/or aliphatic polyamines containing primary NH.sub.2 -groups obtainable by the process according to the invention for the production of polyurethanes, such as optionally cellular polyurethane plastics and polyurethane foams.