Hybrid pigments improve paper gloss
Wednesday, 29 June 2011
Study investigates the potential of novel organic-inorganic pigments in paper coatings.
Inorganic pigment kaolin
Researchers from Center of Excellence for Functional Materials and Laboratory of Polymer Technology, Åbo Akademi University, Finland, have investigated novel organicinorganic hybrid pigments. The pigments were prepared by in situ imidization of a poly(styrene-co-maleic anhydride) (SMA) aqueous dispersion with ammonia in the presence of inorganic pigments, i.e. kaolin or a mixture of kaolin/alumina trihydrate. The objective was to allow the organic nano-particles to precipitate during their formation onto the surface of the inorganic pigments and to investigate their potential in paper coatings. The produced hybrids were applied as auxiliary pigments in paper coating where they improved gloss without roughening the paper surface. Read the complete study in the "Progress in Organic Coatings", Vol. 71, issue 3, July 2011.
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