Selected Radical Azoinitiators in the synthesis of Solvent-Borne Acrylic Pressure-Sensitive Adhesives

Authors: 
Barbara Pabin-Szafko, Ewa Wisniewska and Zbigniew Czech

Functional azoinitiators: 2,2’-azobis(2-methyl-4-hydroxybutyl propionate) (AIB-BD), 2,2’-azobis[2-methyl-ω-hydroxy-tri(oxyethylene) propionate] [AIB-Tri(OE)] and 2,2’-azobis[2-methyl-ω-hydroxy-oligo(oxyethylene) propionate] [AIB-OOE(400)] were used in radical polymerization of 2-ethylhexyl acrylate, methyl acrylate and acrylic acid in organic solvent ethyl acetate to prepare solvent-borne acrylic pressure-sensitive adhesives (PSA). After polymerization the viscosity, molecular weight and polydispersity of received acrylic PSA have been evaluated and compared with the product of polymerization initiated by the conventional azoinitiator 2,2’-azobisisobutyronitrile (AIBN).

[1]    Benedek I. (ed.): Developments in pressure-sensitive products, CRC Press, Boca Raton FL 2006.
[2]    Czech Z.: Int. J. Adhes. Adhes., 2004, 24, 503.
[3]    Czech Z.: Polym. Adv. Technol., 2004, 15, 539.
[4]    Lin J. and Wen W.: Adhes. Age, 1985, 12, 22.
[5]    Odian G.: Principles of polymerization, 3rd Edn., Wiley, New York 1991.
[6]    Matyjaszewski K. and Davis T. (eds.): Handbook of radical polymerization, Wiley – Interscience 2002.
[7]    Matyjaszewski K.: XVI Ogolnopolskie Seminarium Naukowe - Postęp w chemii i fizyce polimerow, Lodz, 2001.
[8]    Czech Z., Butwin A., Herko E., Hefczyc B. and Zawadiak J.: eXPRESS Polym. Lett., 2008, 2, 277.
[9]    Moad G. and Solomon D.: The chemistry of free radical polymerization, 1st Edn. Elsevier Sci. Ltd. 1995.
[10]    Buback M., Huckestein B., Kuchta F.-D. et al.: Macromol. Chem. Phys., 1994, 195, 2117.
[11]    Sugiyama K., Ohga K. and Kikukawa K.: Makromol. Chem. Phys., 1994, 195, 1341.
[12]    Onderko K., Pabin-Szafko B. and Szafko J.: Karbo, 2004, 49, 175.
[13]    Wisniewska E. and Pabin-Szafko B.: e-Polymers 2007, 136.
[14]    Walz R., Bцmer B. and Heitz W.: Makromol. Chem., 1997, 178, 2527.
[15]    Pabin-Szafko B., Wisniewska E. and Szafko J.: Polimery, 2005, 50, 271.
[16]    Pabin-Szafko B., Wisniewska E. and Szafko J.: Ekoplast, 2002, 21-22, 47.
[17]    Benedek I.: Pressure-sensitive design, theoretical aspects. VSP, Leiden Boston 2006.
[18]    Wisniewska E. and Pabin-Szafko B.: Polimery, 2007, 52, 562.