Phenolic antioxidants in crystalline form

Phenolic antioxidants in crystalline form

The invention relates to a process for preparing solid particles of a phenolic antioxidant from the IRGANOX series in the form of crystals, particularly IRGANOX 1010 and 1098, the crystal particles obtainable by the process, the further processing of the crystal particles, an aqueous dispersion comp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DANIEL REHM, JOHANNES SCHAFTER, PAUL ADRIAAN VAN DER SCHAAF, CHRISTIAN GUCKEL
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
COMPOSITIONS BASED THEREON
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:The invention relates to a process for preparing solid particles of a phenolic antioxidant from the IRGANOX series in the form of crystals, particularly IRGANOX 1010 and 1098, the crystal particles obtainable by the process, the further processing of the crystal particles, an aqueous dispersion comprising the phenolic antioxidant, novel crystal modifications of pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate] (mu-form) and N,N'-hexane-1,6diyl-bis[3-(3,5-di-tert-butyl-4-hydroxypheylpropamide)] (beta-form) and aqueous dispersion comprising the new crystal modifications.