分散剂技术基础知识.pdf

1、Dispersant TechnologyFundamentalsTony MoySr.Technical SpecialistBASF Formulation AdditivesAgenda What,Why,and How Dispersant types,associated pigment applications,and considerations for selection Optimizing dispersant concentration/level in a formulation Process considerations Case Studies plus Bonu

2、s Topic Questions?2What are Dispersants?3Dispersing Process4May not be requiredfor easy to grindpigmentsWhy use Dispersants?Why they are neededDispersants enable favored properties of pigments5Why use Dispersants?Value of Dispersants Minimize interaction of pigmentsReduce viscosityEnhance stability

3、of pigment and dispersionReduced settling and kick outMaximize performance contribution of pigments(color,protection,etc.)Minimize the amount of pigment required to do the job More formulation latitude:ability to load more(solids)intoformulationIntroduce filler/extender pigmentsUse less resin to ach

4、ieve mechanical propertiesUse less primary pigment ProductivityShorter dispersion timeTransfer product with less energy and time6How do Dispersants work?Dispersant MechanismsUltimately force of repulsion created by dispersant must overcomeattractive forces of pigment particles to realize a stable st

5、ate7Types of Dispersants8Types of Dispersants9Stabilizing Inorganic Pigment10Stabilizing Carbon Black and Organic Pigment11Selecting a Dispersant Key Questions to consider when selecting/using dispersantsThere will typically be a compromise in performance targetsDispersant must be compatible with th

6、e mediaPigment typically dictates the dispersant typeMore difficult to disperse pigments require higher energy mixing2.What is it dispersed in?3.How is it dispersed?Dispersant(s)to trial4.What is the objective?1.What is being dispersed?12Selecting a Dispersant:General Guidelines Pigments&Benefits13D