Preparation of pigment dispersion resin and stable colour paste
Abstract
Purpose
The purpose of this research is to prepare a dispersion resin with good dispersity and a colour paste with good stability. At present, the colour paste is being prepared using the pigment dispersion resin which has the group quaternary ammonium. The dispersion resin prepared has good dispersity of pigment and extender. However, the stability of storage and construction of the colour paste is relatively poor, which has a negative influence on the application of cathodic electrodeposited (CED) coatings. However, the detailed investigation on the dispersion resin and the stable colour paste has not been reported.
Design/methodology/approach
Three steps are adopted to prepare the dispersion resin, that is blocking toluene diisocyanate (TDI), quaternary ammoniation of blocked TDI and ring opening of epoxy resin. The resultant dispersion is used to prepare the colour paste. The factors, which have an influence on the dispersity of the dispersion resin and stability of the colour paste, are optimised.
Findings
The typical recipes of preparing the dispersion resin and the resultant colour paste are obtained. The dispersity of the dispersion resin and stability of the colour paste are good based on the typical recipe. In addition, the film of the CED coating is smooth, dense and hard when the colour paste is used in the CED coating.
Practical implications
The dispersion resin can be used to prepare a colour paste, which can be used in the CED coatings. In addition, it also can be applied as a binder of coatings and adhesions.
Originality/value
The factors, which have an influence on the dispersity of the dispersion resin and stability of the colour paste, are studied in detail. The typical recipes of preparing the dispersion resin and the resultant colour paste are obtained. Based on the typical recipe, the dispersity of the dispersion resin and stability of the colour paste are good.
Keywords
Acknowledgements
This work has been supported by the Science & Technology Innovation Foundation of Ministry of Science & Technology for Small-Medium Enterprises, China (No. 12C26213302984). In addition, the financial support of the Science and Technology Department of Zhejiang Province (No. 2010C31040) and Zhejiang University of Technology Natural Science Foundation (No. 20100202) are gratefully acknowledged. Of course, the authors are also grateful to their partner, Wanguo Coatings Co. Ltd., who prepared the colour pastes.
Citation
Chen, L., Bao, Z., Fu, Z. and Li, W. (2015), "Preparation of pigment dispersion resin and stable colour paste", Pigment & Resin Technology, Vol. 44 No. 4, pp. 193-197. https://doi.org/10.1108/PRT-10-2014-0088
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited