Synthesis and Performance of Reactive Light Stabilizers for Weather-Resistant UV-Curable Coatings

Se-Chan Jang; Sung-Chul Yi; Jin-Who Hong

Journal of Industrial and Engineering Chemistry, Vol.11, No.6, 964-970, November, 2005

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Synthesis and Performance of Reactive Light Stabilizers for Weather-Resistant UV-Curable Coatings

Se-Chan Jang, Sung-Chul Yi , and Jin-Who Hong^{1, †}

Department of Chemical Engineering, Hanyang University, Seoul 133-791, Korea
¹Department of Polymer Science & Engineering, Chosun University, Gwangju 501-759, Korea

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In this study we investigated whether the weathering performance of UV-curable coatings could be improved significantly by using both a reactive light stabilizer and an optimized photoinitiator combination. A reactive light stabilizer (UCHA) containing a UV absorbance group, a radical scavenger, and acryl groups in the same molecule was synthesized and its performance investigated. Experimental studies of the UV-curing kinetics indicated that a combination of Irgacure 819 and Darocure 1173, in a ratio of 1:3, provided the best performance and cost. The outdoor resistance of the coated films was tested in an accelerated QUV weatherometer; IR spectroscopy was used to monitor quantitatively the chemical changes that occurred during QUV irradiation. The exposure results obtained with UCHA showed that the UV-curable coatings are useful in outdoor applications.

Keywords:UV curing;coatings;weather resistance;light stabilizer;acrylates

[References]

Rao AJ, Kanitkar DS, Parab AK, Prog. Org. Coat., 25, 221 (1995)
Hoyle CE, Kinstle JF, Radiation curing of polymeric materials, Chap. 28, American Chemical Society, Washington DC (1989)
Uminski M, Saija LM, Surf. Coat. Int., 6, 244 (1995)
Hong LY, Cho YS, Kim DP, J. Ind. Eng. Chem., 11(2), 275 (2005)
Lee BH, Choi JH, Kim HJ, Kim JI, Park JY, J. Ind. Eng. Chem., 10(4), 608 (2004)
Valet A, Prog. Org. Coat., 35, 223 (1999)
Decker C, Moussa K, Bendaikha T, J. Polym. Sci. A: Polym. Chem., 29, 739 (1991)
Schirmann P, Dextor M, Handbook of coating additives, p. 225, Marcel Dekker, New York (1987)
Berner G, Rembold M, Farbe Lack, 89, 840 (1983)
Jurgetz A, Rothbaecherr H, Bliefert C, Farbe Lack, 91, 921 (1985)
Berner G, Deslex G, Schoohf F, Fatipec Congress (Amsterdam) : Congress Book, 2, 61 (1980)
Bendaikha T, Decker C, J. Radiat. Curing, 11, 6 (1984)
Hult A, Rnby B, Polym. Degrad. Stabil., 8, 75 (1984)
Allen NS, Robinson PJ, White NJ, Skelhorne GG, Eur. Polym. J., 20, 13 (1984)
Gatechair L, Evers H, Modern Paint Coat., 76, 38 (1986)
Decker C, Moussa K, Bendaikha T, J. Polym. Sci. A: Polym. Chem., 29, 739 (1991)
Valet A, Polym. Paint Col. J., 182, 406 (1992)
Decker C, Biry S, Prog. Org. Coat., 29, 81 (1996)
Heller HJ, Blattmann HR, Pure Appl. Chem., 30, 145 (1972)
Heller HJ, Blattmann HR, Pure Appl. Chem., 36, 141 (1973)
Valet A, Farbe Lack, 96, 189 (1990)
Gugmus F, Current trends in mode of action of hindered amine light stabilizers, 16th Annu. Meeting: Polym. Stab. Appl. (Birmingham), Sept. (1991)
Denisov ET, Polym. Degrad. Stabil., 34, 325 (1991)
Schwalm R, Decker C, Masson F, Heischkel Y, Jaworek T, Beck E, Enenzel P, Menzel K, RadTech Europe, August (2004)

[Referenced By]

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[1] Rao AJ, Kanitkar DS, Parab AK, Prog. Org. Coat., 25, 221 (1995)

[2] Hoyle CE, Kinstle JF, Radiation curing of polymeric materials, Chap. 28, American Chemical Society, Washington DC (1989)

[3] Uminski M, Saija LM, Surf. Coat. Int., 6, 244 (1995)

[4] Hong LY, Cho YS, Kim DP, J. Ind. Eng. Chem., 11(2), 275 (2005)

[5] Lee BH, Choi JH, Kim HJ, Kim JI, Park JY, J. Ind. Eng. Chem., 10(4), 608 (2004)

[6] Valet A, Prog. Org. Coat., 35, 223 (1999)

[7] Decker C, Moussa K, Bendaikha T, J. Polym. Sci. A: Polym. Chem., 29, 739 (1991)

[8] Schirmann P, Dextor M, Handbook of coating additives, p. 225, Marcel Dekker, New York (1987)

[9] Berner G, Rembold M, Farbe Lack, 89, 840 (1983)

[10] Jurgetz A, Rothbaecherr H, Bliefert C, Farbe Lack, 91, 921 (1985)

[11] Berner G, Deslex G, Schoohf F, Fatipec Congress (Amsterdam) : Congress Book, 2, 61 (1980)

[12] Bendaikha T, Decker C, J. Radiat. Curing, 11, 6 (1984)

[13] Hult A, Rnby B, Polym. Degrad. Stabil., 8, 75 (1984)

[14] Allen NS, Robinson PJ, White NJ, Skelhorne GG, Eur. Polym. J., 20, 13 (1984)

[15] Gatechair L, Evers H, Modern Paint Coat., 76, 38 (1986)

[16] Decker C, Moussa K, Bendaikha T, J. Polym. Sci. A: Polym. Chem., 29, 739 (1991)

[17] Valet A, Polym. Paint Col. J., 182, 406 (1992)

[18] Decker C, Biry S, Prog. Org. Coat., 29, 81 (1996)

[19] Heller HJ, Blattmann HR, Pure Appl. Chem., 30, 145 (1972)

[20] Heller HJ, Blattmann HR, Pure Appl. Chem., 36, 141 (1973)

[21] Valet A, Farbe Lack, 96, 189 (1990)

[22] Gugmus F, Current trends in mode of action of hindered amine light stabilizers, 16th Annu. Meeting: Polym. Stab. Appl. (Birmingham), Sept. (1991)

[23] Denisov ET, Polym. Degrad. Stabil., 34, 325 (1991)

[24] Schwalm R, Decker C, Masson F, Heischkel Y, Jaworek T, Beck E, Enenzel P, Menzel K, RadTech Europe, August (2004)