Sandoz Gmbh

Other

Rolf Hasler

Francis Palacin

Jose Carbonell

Roland Walliser

Beat Henzi

Tibor Robinson

Manuel Jose Domingo

Ernst Schnider

Hermann Ulshoefer

Viktor Sanahuja

Pigments (P) obtainable by cationizing desolubilization of (L) the colored leuco form of sulphur dyes and standardization of the desolubilized products and their use, in particular in printing inks.

Pigments, their production and use

The invention provides a process for the exhaust dyeing with a reactive dyestuff of a textile material comprising cellulosic fibres, which process comprises the step of adding to the dyebath containing the reactive dyestuff, simultaneously the salt and the alkali in specified quantities metered per unit time so as to give a substantially linear exhaustion of the dyebath.

Exhaust dyeing of cellulosic substrates with reactive dyes controlled

The invention relates to a process for exhaust dyeing a textile fibre substrate to obtain level dyeings, which process comprises the step of adding to the dyebath the effective amount of dyestuff or electrolyte or dyestuff and electrolyte either simultaneously or one after the other in specified quantities per cycle of the dyeing machine, metered according to a mathematical function.

Process for exhaust dyeing a textile fiber material: controlled addition

Dyeings on cellulose with direct or reactive dyestuffs are given improved wet fastness properties by aftertreatment with a reaction product or mixture of a polybasic amino compound (A) with an N-methylol compound (B) or with formaldehyde or a formaldehyde donor and optionally a crosslinking catalyst (C). Particular direct or reactive dyestuffs and polybasic amino compounds are determined to be suitable in the dyeing and aftertreatment when the dyestuff and the polybasic amino compound (A) are such that when mixed together in aqueous solution they give a precipitate which, after washing and drying does not redissolve in aqueous alkali at pH.gtoreq.12 at room temperature.

Method for determining the compatibility of a direct or reactive

Disclosed is a method of rapid dyeing a substrate comprising polyester fibres at a temperature above 100.degree. C. comprising bringing into contact with the substrate an aqueous dyebath containing a mixture of at least two disperse dyes having each individually specific physicochemical properties.

Rapid dyeing of polyester fibers with a mixture of disperse dyes

The invention relates to a process for continuous dyeing a cellulosic fibrous substrate with a direct or reactive dye comprising the steps of

Continuous dyeing process which provides improved wetfastness:

The present invention relates to a novel exhaust-dyeing process to obtain level dyeings which is characterized by the step of regulating the parameters that affect the rate of adsorption of the dye onto the substrate in order to prevent the rate of bath exhaustion as a function of the number of cycles of dye liquor and/or substrate from exceeding a predetermined limit. The invention also relates to an apparatus for effecting said process.

Apparatus useful in exhaust dyeing

The present invention relates to a novel exhaust-dyeing process to obtain level dyeings which is characterised by the step of regulating the parameters that affect the rate of adsorption of the dye onto the substrate in order to prevent the rate of bath exhaustion as a function of the number of cycles of dye liquor and/or substrate from exceeding a predetermined limit. The invention also relates to an apparatus for effecting said process.

Method and apparatus for regulating the rate of dye adsorption by the

The present invention concerns a novel method of winding bobbins having a predetermined radial fluid permeability which comprises winding yarn or fabric on a hollow permeable core, passing a fluid radially through the windings on the core and terminating the winding when a predetermined fluid pressure is attained, and an apparatus therefor. Said method and apparatus enable 'bobbins' to be uniformly dyed.

Method and apparatus for winding bobbins

The invention concerns a novel automatic metering system for producing a liquor containing a predetermined concentration of at least one component thereof, which comprises a mixing tank in which the liquor components are mixed, a metering device adapted to meter out at least one of the components into the mixing tank, an analyzer adapted to measure the concentration of the component(s) required at a predetermined concentration and a data processing unit, with an input from the analyzer and an output to the metering device, being programmed to effect an operational cycle which comprises computing the deviation of the measured concentration from the predetermined concentration of the component(s), correlating the deviation with the amount of at least one of the components necessary to be metered out, substantially to reduce said deviation by a reduction factor of less than 100 percent, and automatically operating the metering device to meter out the correlated amount, and to repeat said operational cycle until the predetermined concentration has been substantially reached, and a method of operating the system.

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Oberwil, Switzerland

Rolf Hasler