Hybrid waterborne polyurethane/acrylate dispersion synthesized with bisphenol A-glicidylmethacrylate (Bis-GMA) grafting agent

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Title: Hybrid waterborne polyurethane/acrylate dispersion synthesized with bisphenol A-glicidylmethacrylate (Bis-GMA) grafting agent
Authors: Alvarez, Gustavo A. | Fuensanta, Mónica | Orozco, Víctor H. | Giraldo, Luis F. | Martín-Martínez, José Miguel
Research Group/s: Adhesión y Adhesivos
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica
Keywords: Waterborne dispersions | Polyurethane-acrylate | Bisphenol-A-glycidyl methacrylate (Bis-GMA) | Coatings
Knowledge Area: Química Inorgánica
Issue Date: May-2018
Publisher: Elsevier
Citation: Progress in Organic Coatings. 2018, 118: 30-39. doi:10.1016/j.porgcoat.2018.01.016
Abstract: New hybrid waterborne polyurethane/acrylate (WPUA) dispersions were synthesized by grafting with bisphenol-A-glycidyl dimethacrylate (Bis-GMA) in order to create chemical bonds between polyurethane and polyacrylate chains. WPUAs were prepared by using prepolymer self-emulsifying method with isophorone diisocianate, poly(tetramethylene ether) glycol, dimethylolpropionic acid, and ethylenediamine in the polyurethanic part, and styrene and n-butyl acrylate in the polyacrylate portion. A redox pair system consisting of ascorbic acid and hydrogen peroxide were used as polymerization initiator. The particle size of the WPUA dispersions increased by increasing the Bis-GMA/1,4 butanediol ratio, stable dispersions of negatively charged particles were obtained, and they had low viscosity (around 1.3 mPa.s) in spite of the relatively high solids content (27 wt%). Higher thermal stability was obtained when 50 mol% of chain extension was carried out with Bis-GMA. Using Bis-GMA/BD, instead of HEMA, as grafting agent, allowed obtaining hybrid polyurethane dispersions with the lowest mean particle size and better colloidal stability. Finally, the addition of 35 wt% Bis-GMA increased noticeably the cross-cut adhesion of polyurethane/acrylate coatings to stainless steel.
Sponsor: The authors thank to the University of Antioquia for the “Estudiante Instructor” Grant.
URI: http://hdl.handle.net/10045/73713
ISSN: 0300-9440 (Print) | 1873-331X (Online)
DOI: 10.1016/j.porgcoat.2018.01.016
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Published by Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.porgcoat.2018.01.016
Appears in Collections:INV - LAA - Artículos de Revistas

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