TITLE:
The Synthesis of Diaminoanthraquinone Coloured Cross Linked Epoxy Resins and Their Application in Paint and Selected Polymers
AUTHORS:
Zwahruddeen Muhammad Salisu, Mohammed Kabir Yakubu, Peter Obinna Nkeonye, Hamza Abba
KEYWORDS:
Epoxy Resin; Diaminoanthraquinone Derivatives; Chromophore; Pigments
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.4 No.1,
January
20,
2014
ABSTRACT: Novel polymeric pigments were synthesized in xylene by cross linked epoxy resin with 1,4 and 1,5-diaminoanthraquinones, by varying weight
fractions from 5% to 20% of the diaminoanthraquinone derivatives. FTIR, UV and
solubility tests were carried out. The pigments were then used to colour PLA,
PMMA, PE and also in emulsion paints using polyvinyl alcohol as binder. Their
light fastness, surface drying time and surface hardening time were assessed.
It was found that λmax of
the 1,4-diaminoanthraquinone shifted towards longer wavelength after the cross
linkage, in contrast to the 1,5-diaminoanthraquinone which suffered a blue
shift. However in all the cases, the λmax was not affected by the weight fractions of the anthraquinones, but the
absorptivity coefficients was significantly increased as the weight fractions
of the anthraquinones increased. The light fastness properties of the coloured
plastics varied from 4 to 7, indicating a trend of
increase with the weight fractions of the anthraquinones. Similar observations
were seen with the emulsion paints produced. In all the cases, the 1,4-diaminoanthraqunione produced better result.