WHEREIN X represents the bivalent grouping -CH2-NH-CH2-, m represents an integer of 2 to 4, and Y represents a radical of the benzene, naphthalene, heterocyclic or azo series, at least one of which is substituted by at least one sulphonic or carboxylic acid group, and salts thereof with an amine or ammonium compound, and nitrosated, oxidised and metalliferous derivatives thereof; the dyes, derivatives and salts are useful for the color-finishing of leathers, for example for the aniline finishing of skins, whether or not previously dyed, and for the finishing of leathers with a buffed or artificial hair side, as well as for the spray-gun dyeing of full-grain leathers on which they give very vivid transparent shades which are very fast, especially to light and wet rubbing.
摘要:
A cover for containers whose contents are under pressure which includes a substantially flat central portion, a crimping flange portion and a neck interposed between the flange portion and the central portion and connected thereto by connecting portions without any break in continuity.
IN WHICH Z IS METHYL OR CARBOXY, M IS ONE OR TWO AND N IS ZERO, ONE OR TWO, THE OXIDATION BEING EFFECTED IN ALKALINE MEDIUM AT A TEMPERATURE OF FROM 40* C. TO 100* C. FOR FROM 10 MINUTES TO 4 HOURS INCLUSIVE WITH A QUANTITY OF OXIDISING AGENT, CALCUALTED AS 10% SOLUTION OF HYDROGEN PEROXIDE, NOT MORE THAN THREE TIMES THE WEIGHT OF THE COMPOUND OF THE ABOVE FORMULA, SAID OXIDISING AGENT BEING SELECTED FROM THE GROUP CONSISTING OF AIR, HYPOCHLORITE, HYDROGEN PEROXIDE, SODIUM PERMANGANATE, POTASSIUM PERMANGANATE, SODIUM DICHROMATE, POTASSIUM DICHROMATE, AND MANGANESE DIOXIDE.
IN WHICH X represents a sulphonyl or isopropylidene group and R and R'' are the same or different and each represents a residue of a diazotisable aromatic primary amine which may carry in the ortho position to the amino group a group capable of taking part in the formation of a metalliferous complex, and metalliferous complexes thereof. These dyestuffs are useful for the colouration of leather and may be prepared by coupling a compound of the formula:
WITH A DIAZO DERIVATIVE OF AN AMINE OF FORMULA R-NH2 or R''-NH2 or the diazo derivatives of such amines, at the rate of two moles of diazo derivative or derivatives per mole of compound of formula (II). The dyestuffs give dyeings which possess good fastness to washing, solvents and light.
摘要:
This invention relates to a method for polymerizing tetrafluoroethylene in suspension comprising initiating polymerization with a previously prepared tetrafluoroethylene polymer, in the absence of any other polymerization initiating agent. This invention also relates to the powdered polytetrafluoroethylene prepared by the above method.
摘要:
The invention relates to an apparatus for connecting a mobile tank to a loading and unloading station including a platform for the guidance of the pipes of the loading station for alignment with the pipes of the tank in which the platform which is suspended at the station has two transverse guide ramps and one longitudinal guide stop, while the other member has a pivotable finger which can act upon the ramps and the stops.
摘要:
AN ALUMINUM-STEEL COMPOSITE AND METHOD FOR PRODUCING SAME WHEREIN A MATRIX COMPRISING AT LEAST TWO SHEETS OF ALUMINUM IS INTERNALLY REINFORCED WITH A PLURALITY OF LAYERS OF A PLURALITY OF THIN STEEL STIPS, WHEREIN THE LAYERS MAY OR MAY NOT BE SEPARATED BY ONE OR MORE SHEETS OF ALUMINUM, AND THE RESULTING MATRIX IS SUBJECTED TO ELEVATED PRESSURE TO FORM AN INTERMETALLIC BOND BETWEEN THE SHEETS AND THE STRIPS TO PROVIDE A COMPOSITE HAVING SUBSTANTIALLY ISOTROPIC PROPERTIES.
摘要:
A method for the production of uranium compounds in a high state of purity comprising the steps of contacting a uranium bearing material with aqueous sulphuric acid, adjusting the ratio of water and sulphuric acid in the resulting leach solution to within the range of 0.16 to 0.26 to precipitate impurities from the first leach solution, diluting a second leach solution after removal of the precipitate formed to adjust the ratio of water and sulphuric acid to within the range of 0.35 to 0.50.
摘要:
5-FLUORO-8-BISMUTHO-HYDROXY-QUINOLINE WHICH MAY BE PREPARED BY REACTING 5-FLUORO-8-BYDROXY-QUINOLINE WITH A BISMUTH SALT AND WHICH IS USEFUL IN THE TREATMENT OF PARASITOSES AND DISEASES OF THE DIGESTIVE TUBE OF BACTERIAL ORIGIN IN HUMAN BEINGS.