AQUEOUS DISPERSE SYSTEMS OF ORGANIC PIGMENTS AND PROCESS FOR THE PREPARATION THEREOF

The invention relates to disperse aqueous systems of organic pigments comprising 5 ... 45% of organic pigment, 1 ... 10% of wetting agent, 2.5 ... 25% dispersing agent, 0.5 ... 2% of thickener, 0.1 ... 2% preserving agent, 0.1 ... 2% anti-foaming agent, 0.25 ... 2.5% of softener, 30 ... 90% deminera...

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Bibliographische Detailangaben
Hauptverfasser: ROIU VALENTIN, WAGNER LUMINI A EUGENIA, IONI ELENA, ROIU ALINA, B LTEANU STELIAN VALENTIN
Format: Patent
Sprache:eng ; rum
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Zusammenfassung:The invention relates to disperse aqueous systems of organic pigments comprising 5 ... 45% of organic pigment, 1 ... 10% of wetting agent, 2.5 ... 25% dispersing agent, 0.5 ... 2% of thickener, 0.1 ... 2% preserving agent, 0.1 ... 2% anti-foaming agent, 0.25 ... 2.5% of softener, 30 ... 90% demineralized water, the percentage being expressed by weight, and have a pH ranging from 6.5 ... 9.5 and to as process for preparing the same, which consists in the impastation of the organic pigment in an aqueous medium, in the presence of a softener and wetting agent, the obtained mixture being subjected to grinding in a microelement mill, at a microelement : mixture mass ratio of 1 ... 3 : 1, in the presence of a dispersing agent and antifoaming agent, followed by adding the thickener, preserving agent to the obtained dispersion and finally correcting the dispersion pH to the value of 6.5 ... 9.5 by adding a basic substance. Invenţia se referă la sisteme disperse, apoase, de pigmenţi organici, constituite din 5...45% pigment organic, 1...10% agent umectant, 2,5...25% agent dispersant, 0,5...2% agent îngroşător, 0,1...2% agent conservant, 0,1...2% agent antispumant, 0,25...2,5% agent dedurizant, 30...90% apă demineralizată, procentele fiind exprimate în greutate şi au un pH cuprins între 6,5...9,5 şi la un procedeu de obţinere a acestora, care constă în ampastarea pigmentului organic în mediu apos, în prezenţă de agent dedurizant şi agent umectant, amestecul obţinut fiind supus măcinării, într-o moară cu microelemente, la un raport masic microelemente : amestec de 1...3 : 1, în prezenţă de agent dispersant şi agent antispumant, după care, la dispersia astfel obţinută, se adaugă agentul îngroşător, agentul conservant, în final pH-ul dispersiei fiind corectat la valoarea de 6,5...9,5, prin adăugarea substanţei cu caracter bazic.