Synthesis and Characterization of Anionic Polyurethane Dispersants for Waterborne Paints

Journal: Vol.7, No.3, Summer 2014 - Article 1   Pages :   Until 

Article Code:

Farhood Najafi: Institute for Color Science and Technology - Departments of Resin and Additives
Behzad Shirkavand Hadavand: Institute for Color Science and Technology - Departments of Resin and Additives
F. Manouchehri: Damghan Branch, Islamic Azad University - Department of Chemistry

Article's abstract:

Anionic polyurethane dispersants APUDs were used as dispersing agents in formulation of waterborne paints. The APUDs were synthesized by three steps. In the first step, macromonomer diisocyanate having carboxylic acid was prepared by isophorone diisocyanate IPDI, dimethylol propionic acid DMPA in presence of acetone as solvent and dibutyltin dilaurate DBTDL as catalyst. Then, carboxylic polyurethane was prepared by reaction macromonomer diisocyanate having carboxylic acid groups with alcohols. In this work, alcohols were 1,4-butanediol and 1,6-hexanediol as difunctional alcohols, trimethylol propane as trifunctional alcohol and pentaerythritol as tetrafunctional alcohol. The final step involved neutralization and dispersion in water, where acidic polyurethane was neutralized by the addition of triethylamine TEA. The polymers have been characterized with 1H-NMR and FT-IR. The dispersion of APUDs depends on their molecular weights and chemical structures. Dispersion of titanium dioxide in typical waterborne acrylic resin has been investigated.

Dispersing agent, Polyurethane dispersion, Polymeric dispersant, Anionic dispersant

1. J. Schmitz, H. Frommelius, U. Pegelow, H. G. Schulte, R. Höfer, A new concept for dispersing agents in aqueous coatings, Prog. Org. Coat., 35(1999), 191-196.#2. R. Hess, Modern dispersing agents for polypropylene, Plastics, Additives and Compounding, 4(2002), 28-31.#3. E. Reuter, S. Silber, C. Psiorz, The use of new block copolymeric dispersing agents for waterborne paints-theoretical and practical aspects, Prog. Org. Coat., 37(1999), 161-167.#4. G. D. Parfitt, D. G. Wharton, The dispersion of rutile powder in aqueous surfactant solutions, J. Colloid Interface Sci., 38(1972), 431-439.#5. R. Vestberg, A. M. Piekarski, E. D. Pressly, K. Y. Van Berkel, M. Malkoch, J. Gerbac, N. Ueno, C. J. Hawker, A general strategy for highly efficient nanoparticle dispersing agents based on hybrid dendritic linear block copolymers, J. Polym. Sci. Part A: Polym. Chem., 47(2009), 1237-1258.#6. D. Dietrich, Aqueous emulsion, dispersions, and solutions of polyurethanes; synthesis and properties, Prog. Org. Coat., 9(1981), 281-340.#7. C. Y. Li, W. Y. Chiu, T. M. Don, Preparation of polyurethane dispersions by miniemulsion polymerization, J Polym. Sci. Part A: Polym. Chem., 43(2005), 4870-4881.#8. D. R. Karsa, Additives for water based coatings; the royal society of chemistry publication, Great Britain, 1990.#9. S. M. Seyed Mohaghegh, M. Barikani, A. A. Entezami, Preparation and properties of an aqueous polyurethane dispersion, Iran. Polym. J., 14(2005), 163-168.#10. Y. S. Kwak, S. W. Park, Y. H. Lee, H. D. Kim, Preparation and properties of waterborne polyurethanes for watervapor-permeable coating materials, J. Appl. Polym. Sci., 89(2003), 123-129.#11. A. Bouvy, Polymeric surfactants in polymerization and coatings, Eur. Coat. J., 11(1996), 822-826.#12. M. Pattanaik, T. K. Rout, D. K. Sengupta, Electrokinetics of TiO2 in the interpretation of its dispersion characteristics, Surf. Coat. Int., 12(2000), 592-596.#13. R. J. Kostelnik, F. C. Wen, Very high solids TiO2 slurries, US Pat. 6197104, 2001. 14. H. J. W. Van den Haak, Design of pigment dispersants: Methodology for selection of anchoring groups, J. Coat. Technol., 69(1997), 137-142.#15. S. Farrokhpay, G. E. Morris, D. Fornasiero, P. G. Self, Effects of chemical functional groups on the polymer adsorption behavior onto titania pigment particles., J. Colloid Interface Sci., 274(2004), 33-40.#16. H. T. Chen, S. A. Ravishankar, R. S. Farinato, Rational polymer design for solid–liquid separations in mineral processing applications, Int. J. Miner. Process., 72(2003), 75-86.#17. S. Creutz, R. Jerome, G. M. P. Kaptijn, A. W. Van derWerf, J. M. P. Akkerman, Design of polymeric dispersants for waterborne coatings, J. Coat. Technol., 70(1998), 41-46.#18. R. Satguru, J. McMahon, J. C. Padget, R. C. Coogan, Aqueous polyurethanes-polymer colloids with unusual colloidal, morphological, and application characteristics, J. Coat. Tech., 66(1994), 47-55.#19. B. K. Kim, J. C. Lee, Polyurethane ionomer dispersions from poly(neopentylene phthalate) glycol and isophorone diisocyanate, Polymer, 37(1996), 469-475.#20. D. J. Hourston, G. Williams, R. Satguru, J. C. Padget, D. Pears, The influence of the degree of neutralization, the ionic moiety, and the counterion on water-dispersible polyurethanes, J. Appl. Polym. Sci., 74(1999), 556-566.#21. M. Lahtinen, C. Price, Aqueous poly(urethane–urea) dispersions and cast films based on m-TMXDL. 1. Structure–property relationships, Polym. Int., 51(2002), 353-361.#22. V. D. Athawale, M. A. Kulkarni, Polyester polyols for waterborne polyurethanes and hybrid dispersions, Prog. Org. Coat., 67(2010), 44-54.#23. W. G. Schmidt, K. Seino, M. Preuss, A. Hermann, F. Ortmann, F. Bechstedt, Organic molecule adsorption on solid surfaces: chemical bonding, mutual polarization and dispersion interaction, Appl. Phys. A, 4(2006), 387-397.#24. St. Silber, E. Reuter, A. Stüttgen, G. Albrecht, New concepts for the synthesis of wetting and dispersing additives for water-based systems, Prog. Org. Coat.,45 (2002), 259-266.#25. F. Najafi, Z. Ranjbar, B. Shirkavand Hadavand, Sh. Montazeri, synthesis and characterization of comb polycarboxylic acid dispersants for coatings, J. Appl. Polym. Sci., 126(2012), 877-881.

Article's file
Page view: 3517
Article's download quantity : 557

Article System Login

Prof. Zahra Ranjbar
Dr. Farahnaz Nourmohammadian
Assistant Editor:
Dr. Mozhgan Hosseinnezhad
ISSN (online):
Institute for Color Science and Technology (ICST)

Quick Access
What is your opinion about the manuscript subscription system of PCCC website?
Website Statistics
Page view:3,518
Online Visitors:105