Effects of Anionic Center on Properties of Polyurethane Anionomer Dispersion

Hee Sung Choi; Si Tae Noh; Keun Bae Choi

Journal of Industrial and Engineering Chemistry, Vol.5, No.1, 52-58, March, 1999

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Effects of Anionic Center on Properties of Polyurethane Anionomer Dispersion

Hee Sung Choi, Si Tae Noh^†, and Keun Bae Choi¹

Department of Chemical Engineering, Hanyang University, Ansan 425-791, Korea
¹Hepce Chem Co. LTD, Siheung 429-450, Korea

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Polyurethane anionomer dispersions (PUDs) were prepared from 4,4-dicyclohexylmethane diisocyanate, poly (tetramethylene glycol) and diol bearing pendant carboxylic acid. The type and concentration of diol were varied in order to investigate the influence of anionic center on state of dispersion, morphology and mechanical properties. The diols used in this study were dimethylol propionic acid, THPP-MA and THPP-PA which were synthesized from the esterification reactions of 1,2,3-tri (2-hydroxypropoxy) propane (THPP) with maleic anhydride (MA) and phthalic anhydride (PA), respectively. The particle size of PUD was observed to be dependent on the molecular structure of anionic center, even though it was largely governed by the concentration of acid group. This was attributed to the fact that hydrophilicity of PU ionomer at a given ionic concentration was increased with the flexibility of anionic center, which was in the order of THPP-MA > THPP-PA > dimethylol propionic acid. Surface tension and water swelling were also higher for the PUD with more flexible acid group. The morphological property of PUD film was characterized by DSC. These variations in phase morphology were reflected in the tensile properties of PUD films.

Keywords:polyurethane dispersion (PUD);anionic center;state of dispersion;thermal properties;mechanical properties

[References]

Dietrich D, Prog. Org. Coat., 9, 281 (1981)
Oertel G, Polyurethane Handbook, Carl Hanser Verlag, Munich (1985)
Longworth R, Development in Ionic Polymers, A.D. Wilson and H.J. Prosser (Eds.), p. 53, Applied Science Publishers, London (1983)
Lee YM, Lee JC, Kim BK, Polymer, 35(5), 1095 (1994)
Markush PH, U.S. Patent, 4,408,008 (1981)
Tirpak RE, Markush PH, Proc. Symp. Water-Borne High Solids Coatings, New Orleans, L.A., Feb., 13 (1985)
Kim BK, Lee YM, J. Appl. Polym. Sci., 54(12), 1809 (1994)
Kim BK, Lee JC, J. Polym. Sci. A: Polym. Chem., 34(6), 1095 (1996)
Kim CK, Kim BK, Jeong HM, Colloid Polym. Sci., 269, 895 (1991)
Chen Y, Chen YL, Acta Crystallogr. Sect. A, 46, 435 (1992)
Ahn JB, Cho HK, Jeong CN, Noh ST, J. Korean Ind. Eng. Chem., 8(2), 230 (1997)
Lee JF, Chao DY, Colloid Polym. Sci., 272, 1508 (1994)
Choi KB, Kim HS, Kim KS, Lee SJ, U.S. Patent, 8,772,167 (1998)
David DJ, Staley HB, Analytical Chemistry of Polyurethanes, High Polymer Series, Vol. XVI, Part III, Wiley, New York (1969)
Van Krevelen DW, Properties of Polymers, Elsevier, New York (1976)
Russel WB, Saville DA, Schowalter WR, Colloidal Dispersions, Chap. 7, University of Cambridge Press, Cambridge (1989)
Satguru R, Mcmahon J, Padget JC, Coogan RG, J. Coat. Technol., 66(830), 47 (1994)
Hunter RJ, Introduction to Modern Colloid Science, Oxford University Press, New York (1993)
Ruter IR, Rheol. Acta, 2, 202 (1962)
Ahn TO, Jung SU, Jeong HM, Lee SW, J. Appl. Polym. Sci., 51(1), 43 (1994)

[Referenced By]

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[1] Dietrich D, Prog. Org. Coat., 9, 281 (1981)

[2] Oertel G, Polyurethane Handbook, Carl Hanser Verlag, Munich (1985)

[3] Longworth R, Development in Ionic Polymers, A.D. Wilson and H.J. Prosser (Eds.), p. 53, Applied Science Publishers, London (1983)

[4] Lee YM, Lee JC, Kim BK, Polymer, 35(5), 1095 (1994)

[5] Markush PH, U.S. Patent, 4,408,008 (1981)

[6] Tirpak RE, Markush PH, Proc. Symp. Water-Borne High Solids Coatings, New Orleans, L.A., Feb., 13 (1985)

[7] Kim BK, Lee YM, J. Appl. Polym. Sci., 54(12), 1809 (1994)

[8] Kim BK, Lee JC, J. Polym. Sci. A: Polym. Chem., 34(6), 1095 (1996)

[9] Kim CK, Kim BK, Jeong HM, Colloid Polym. Sci., 269, 895 (1991)

[10] Chen Y, Chen YL, Acta Crystallogr. Sect. A, 46, 435 (1992)

[11] Ahn JB, Cho HK, Jeong CN, Noh ST, J. Korean Ind. Eng. Chem., 8(2), 230 (1997)

[12] Lee JF, Chao DY, Colloid Polym. Sci., 272, 1508 (1994)

[13] Choi KB, Kim HS, Kim KS, Lee SJ, U.S. Patent, 8,772,167 (1998)

[14] David DJ, Staley HB, Analytical Chemistry of Polyurethanes, High Polymer Series, Vol. XVI, Part III, Wiley, New York (1969)

[15] Van Krevelen DW, Properties of Polymers, Elsevier, New York (1976)

[16] Russel WB, Saville DA, Schowalter WR, Colloidal Dispersions, Chap. 7, University of Cambridge Press, Cambridge (1989)

[17] Satguru R, Mcmahon J, Padget JC, Coogan RG, J. Coat. Technol., 66(830), 47 (1994)

[18] Hunter RJ, Introduction to Modern Colloid Science, Oxford University Press, New York (1993)

[19] Ruter IR, Rheol. Acta, 2, 202 (1962)

[20] Ahn TO, Jung SU, Jeong HM, Lee SW, J. Appl. Polym. Sci., 51(1), 43 (1994)