Abstract:
An improved process for the production of Alpha chlorocarboxylic acid chlorides by reaction of a carboxylic acid chloride with chlorine at elevated temperature, wherein the improvement consists in carrying out the reaction in the presence of sulfuric acid. Alpha -chlorocarboxylic acid chlorides are suitable for the production of plant protection agents.
Abstract:
Production of pigmented resin powders by finely dispersing dispersions of pigments in solutions of polymeric materials in at least one organic solvent in water containing a protective colloid while supplying mixing energy, and removing the solvent. A preferred method is to introduce one or more jets of water containing protective colloid at the rate of 5 to 100 m/sec into animpulse exchange chamber together with the dispersion issuing in the immediate vicinity of the orifice(s), and to remove the solvent. The method avoids crosslinking and provides pigmented resin powders of consistently reproducible color which are suitable for conventional powdered-resin coating methods.
Abstract:
Thickeners for print pastes consisting of copolymers from maleic anhydride and a vinylalkyl ether and, if desired, other copolymerizable monomers and which have been cross-linked with polybasic amines or polyhydric alcohols and/or aminoalcohols and then neutralized with ammonia.
Abstract:
A process for the production of o-cyano-phenyl and o-cyanobenzoisothiazolyl, azo-p-aminobenzene dyes by replacing a bromine atom in the ortho-position by the cyano group through reaction with a heavy metal cyanide, particularly cuprous cyanide, in an aqueous medium and at elevated temperature.
Abstract:
Poromeric web materials are continuously manufactured by applying to a thin layer of ice crystals a textile fibrous structure and an aqueous solution or dispersion of A. polyethylenically unsaturated monomers having at least two polymerizable double bonds or mixtures of at least 0.1 percent w/w of such polyethylenically unsaturated monomers and monoethylenically unsaturated copolymerizable monomers and optionally high molecular weight polymers, or B. monoethylenically unsaturated monomers and high polymers having molecular weights of more than 10,000, Cooling the whole to such an extent that at least 50 percent of the water Crystallizes, irradiating the solidified structure with electromagnetic radiation having a wavelength of less than 0.70 .mu.m to cause polymerization of the monomers, causing the structure to thaw, removing the material from the support and optionally washing the removed material, separating it from the water and finally drying it.
Abstract:
Composite film or sheeting consisting of (a) at least one ply (A) of polybutylene terephthalate; (b) at least one ply (B) of a thermoplastics material or a metal suitable for the production of foil; and (c) a layer (C) of adhesive between the plies (A) and (B).
Abstract:
Production of anthraquinone by catalytic oxidation of indans with oxygen in the presence of a vanadium (V) compound with one or more than one compound of thallium and antimony. Anthraquinone which can be prepared by the process according to this invention is a valuable starting material for the production of dyes and pesticides.
Abstract:
A process for the manufacture of deep-shade perylene-3,4,9,10tetracarboxylic acid dianhydride pigments, wherein finely ground crude pigment of which the average primary particle size is from 0.01 to 1 Mu is treated with a primary or tertiary aromatic amine which is liquid at the treatment temperature, or with a strongly polar aprotic solvent, as swelling agent, until the pigment has acquired the optimum color strength. After removal of the swelling agent, a deep-shade, pure pigment is obtained, which is suitable for all pigmentation purposes.
Abstract:
A process for working up by distillation hydroformylation reaction mixtures which have been obtained by the reaction of olefins with carbon monoxide and hydrogen at elevated temperature and superatmospheric pressure in the presence of a carbonyl complex of a metal of Group VIII of the Periodic Table which has been modified with an organic phosphine, wherein said mixture is distilled in the presence of a carboxylic acid.
Abstract:
New and valuable substituted O-(aminosulfonyl)-glycolic anilides and a process for controlling the growth of unwanted plants with these compounds.