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Preparation of aqueous anionic poly-(urethane-urea) dispersions: Influence of the nature and proportion of the urethane groups on the dispersion and polymer properties

Durrieu, Vanessa and Gandini, Alessandro and Belgacem, Mohamed Naceur and Blayo, Anne and Eiselé, Gilles and Putaux, Jean-Luc Preparation of aqueous anionic poly-(urethane-urea) dispersions: Influence of the nature and proportion of the urethane groups on the dispersion and polymer properties. (2004) Journal of Applied Polymer Science, 94 (2). 700-710. ISSN 0021-8995

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Official URL: https://doi.org/10.1002/app.20933

Abstract

Aqueous poly(urethane‐urea) dispersions were prepared by the prepolymer mixing technique without the use of any organic solvent. Most of the work focused on the use of two aliphatic diisocyanates (α,α, α', α'‐tetramethyl‐1,3‐xylylene diisocyanate and isophorone diisocyanate) and two macrodiols (α,ω‐poly(propylene glycol) (Mn = 1000) and α,ω‐poly(caprolactone) (Mn = 530)) in conjunction with a fixed proportion of emulsifying agent (dimethylol propionic acid, neutralized with triethyl amine) and the same chain extender (1,2‐ethylene diamine). The properties of both the dispersions and the dried polymer films, as well as those of some model prepolymers, were characterized as a function of the initial composition to establish criteria leading to the optimized performance in terms of dispersion stability and particle size and polymer properties. The most important parameter in this search was found to be the [NCO]/[OH] ratio, which gave the best results when it approached a value of 2.

Item Type:Article
HAL Id:hal-02108821
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > SICPA (FRANCE)
Laboratory name:
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Deposited By: Yves MOMBOISSE
Deposited On:24 Apr 2019 12:06

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