Process for the preparation of a pigment composition, the pigment composition thus obtained and linear polyesters mass coloured therewith

• Main Authors: LAELY, ANDREAS, ZWAHLEN, GUNTHER, BUXBAUM, LOTHAR
• Format: Patent
• Language: English; French; German
• Published: 05.03.1980
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Verfahren zur Herstellung einer Pigmentzubereitung zum Färben linearer Polyester in der Masse, indem man aus 20 bis 80 Teilen Pigment und 80 bis 20 Teilen eines Polyesters, der zwischen 60 und 160°C schmilzt, durch Lösungsmittel-Salzknetung oder Flush-Prozess ein Vorkonzentrat herstellt und dieses mit einem spinnbaren linearen Polyester verschmilzt und zu Granulat verarbeitet, die nach dem Verfahren erhaltene Pigmentzubereitung und die damit gefärbten linearen Polyester. The invention provides a method for the production of a pigment preparation for coloring linear polyesters in the melt, which comprises forming a concentrate from 20 to 80 parts of pigment and 80 to 20 parts of a polyester which melts between 60 DEG and 160 DEG C., by kneading in the presence of a salt and a solvent or by a flush process, mixing said concentrate with a fibre forming linear polyester, melting the mixture and processing it to granules. The invention also provides the pigment preparation obtained by the process and the linear polyesters colored therewith.