Abstract:
A storage-stable dust-free homogeneous particle formulation, consisting of: (a) at least one water-soluble Vitamin E-derivative, (b) at least one hydrophilic polymer, (c) optionally additional surface-active substances, and (d) optionally additional pharmaceutical additives, with the proviso, that the sum of (a), (b), (c) and (d) equals 100 % by weight of the formulation, and wherein the fines fraction with particle diameters of less than 100μηη is less than 10 % by weight.
Abstract:
Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Trocknung von partikulären Polymeren, umfassend die Schritte: a) Vorlegen eines partikulären Polymers, das 60 Gew.-% bis 90 Gew.-% zumindest eines Lösungsmittels, bezogen auf das Gesamtgewicht von partikulärem Polymer und Lösungsmittel, enthält, b) mechanische Vortrocknung des partikulären Polymers auf 20 Gew.-% bis 50 Gew.-% des zumindest einen Lösungsmittels, bezogen auf das Gesamtgewicht von partikulärem Polymer und Lösungsmittel, wobei die mechanische Vortrocknung in Schritt b) mit einer Walzenpresse durchgeführt wird, wobei die mechanische Vortrocknung in Schritt b) mit einer Walzenpresse durchgeführt wird, und c) Endtrocknung des partikulären Polymers auf 0 Gew.-% bis 15 Gew.-% des zumindest einen Lösungsmittels, bezogen auf das Gesamtgewicht von partikulärem Polymer und Lösungsmittel, wobei das partikuläre Polymer ein Polymer ist, das Wiederholungseinheiten der Formeln (I), (II) und/oder (III) enthält. Die vorliegende Erfindung bezieht sich ferner auf ein Verfahren zur Aufarbeitung von partikulären Polymeren.
Abstract:
The present invention is directed towards a process for making a powder or granule containing (A) at least one chelating agent selected from methyl glycine diacetic acid (MGDA) and glutamic acid diacetate (GLDA) and iminodisuccinic acid (IDS) and their respective alkali metal salts, (B) at least one homo- or copolymer of (meth)acrylic acid, partially or fully neutralized with alkali, said process comprising the steps of (a) mixing the at least one chelating agent (A) and the at least one homo- or copolymer (B) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125°C.
Abstract:
The present invention is directed towards a process for making a powder or granule containing (A) at least one chelating agent selected from methyl glycine diacetic acid (MGDA) and glutamic acid diacetate (GLDA) and iminodisuccinic acid (IDS) and their respective alkali metal salts, (B) at least one homo- or copolymer of (meth)acrylic acid, partially or fully neutralized with alkali, said process comprising the steps of (a) mixing the at least one chelating agent (A) and the at least one homo- or copolymer (B) in the presence of water, (b) removing most of said water by spray-drying or spray granulation using a gas with an inlet temperature of at least 125° C.
Abstract:
The invention relates to a method for drying particulate polymers, having the following steps: a) providing a particulate polymer which contains 60 wt.% to 90 wt.% of at least one solvent, based on the total weight of the particulate polymer and the solvent, b) mechanically pre-drying the particulate polymer to 20 wt.% to 50 wt.% of the at least one solvent, based on the total weight of the particulate polymer and the solvent, wherein the mechanical pre-drying in step b) is carried out using a rolling press, and c) final drying the particulate polymer to 0 wt.% to 15 wt. of the at least one solvent, based on the total weight of the particulate polymer and the solvent. The particular polymer is a polymer which contains the repeating units of the formulas (I), (II) and/or (II). The invention further relates to a method for processing particulate polymers.
Abstract:
A storage-stable dust-free homogeneous particle formulation, consisting of: (a) at least one water-soluble Vitamin E-derivative, (b) at least one hydrophilic polymer, (c) optionally additional surface-active substances, and (d) optionally additional pharmaceutical additives, with the proviso, that the sum of (a), (b), (c) and (d) equals 100 % by weight of the formulation, and wherein the fines fraction with particle diameters of less than 100μηη is less than 10 % by weight.