Preparation of porous, nano-sized urea.formaldehyde polymer powder

Chul-Tae Lee

Journal of Industrial and Engineering Chemistry, Vol.18, No.3, 919-925, May, 2012

DOI10.1016/j.jiec.2011.08.005 Export Citation

Preparation of porous, nano-sized urea.formaldehyde polymer powder

Chul-Tae Lee^†

Department of Chemical Engineering, Dankook University, Gyeonggi-do 448-701, Republic of Korea

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Nano-sized, porous urea-formaldehyde polymer powder was created by variations of an existing reaction. Formaldehyde was reacted with urea at or below the equimolar stoichiometric ratio. The resulting amorphous white powder did not generate formaldehyde. Increased agitation speed during the generation of polymethylene urea restricted the polymer particles’ growth and introduced porosity. Adding sodium dodecyl benzene sulfonate surfactant at agitation speeds over 1500 rpm resulted in 1-5 μm spherical, porous particles. Adding water glass during the synthesis of polymethylene urea (PMU) limited particles’ growth and facilitated uniform porosity. The polymer powder showed wide potential applicability, e.g. polymer fillers and pigments.

Keywords:Urea-formaldehyde reaction;Powder;Porous structure;Porous structure

[References]

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[Referenced By]

[Related Articles]

[1] Dunky M, Int. J. Adhes. Adhes., 18(95) (1998)

[2] Lambeth Gregory H, Sulzer Gerry M, US Patent Publication No. 20,090,035,384 (2009)

[3] Joe Navarrette, Jim Johnson, Steve Gamble, US Patent Publication No.20,060,226,051 (2006)

[4] SUN LF, ANNEN MJ, LORENZANOPORRAS F, CARR PW, MCCORMICK AV, J. Colloid Interface Sci., 163(2), 464 (1994)

[5] Carr PW, McCormick AV, Annen MJ, Sun L, Brown JR, US Patent No. 5,540,834 (1996)

[6] Peter Economou, John F. Hardy, Alfred Renner, US Patent No. 3,909,348 (1975)

[7] Ifuku N, Kurokawa A, Seita K, Usami K, Aikawa N, US Patent No. 4,433,133 (1984)

[8] Formaini R, US Patent No. 4,960,856 (1990)

[9] Darrell JL, Denins KH, US Patent No. 3,849,378 (1974)

[10] Alfred Renner, US Patent No. 3,931,063 (1976)

[11] Graves LR, Mueller JV, US Patent No. 5,362,842 (1994)

[12] Bito M, Konishi S, Fukazawa F, US Patent No. 5,190,983 (1993)

[13] Katsumaki Y, Sanada Y, Nagaoka M, Maehama M, JP Patent No. 61115922A (1986)

[14] Oota K, Sanada Y, JP Patent No. 61127720A (1986)

[15] Huang DK, Holden J, US Patent No. 4,035,328 (1977)

[16] Grooms NS, Snover DA, US Patent Publication No. 20,080,015,301 (2008)

[17] Clarke BJ, Kershaw RW, Lubbeck FJ, US Patent No. 4,007,142 (1977)

[18] Conner AH, in: Salamone C (Ed.), Polymeric Materials Encyclopedia, CRC Press, New York, 8497 (1996)