Application of Some Polymer latexes in Preventing Paper Documents Forgery

Document Type : Original Article

Authors

1 Chemistry Department, Faculty of Science, Al-Azhar University , Cairo, Egypt

2 Cellulose and paper Department, National Research Center, Giza, Egypt

3 Polymers and Pigments Department, National Research Center, Giza., Egypt

4 Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt

5 Forensic Medicine Authority, Ministry of Justice ,Cairo, Egypt

Abstract

The main objective of this research is to improve ink printability of papers via their modification with various types of water-based polymer latexes during paper manufacturing process. In order to achieve this target, various types of styrene-acrylate polymer latexes were used for modification of different types of papers. Styrene-acrylate latexes were prepared via emulsion polymerization of styrene with various acrylate monomers using emulsion polymerization technique. The effect of different emulsifying agents on the properties of the prepared emulsions was studied. The obtained results showed a significant improvement in degree of gloss and ink density on the polymer-coated papers which positively affect the ink ability, and ink holding properties of the modified paper. In addition, ink gloss and ink density of the coated papers improved with increasing the concentration of modifying latexes containing Texapon®P as emulsifier. These promising results open the way to use polymer latexes in treatment of documented value which can be used in stabilization of disappearing ink on paper leading to prevent forgery

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History

  • Receive Date: 11 July 2018
  • Accept Date: 16 August 2018

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