수분산성 폴리우레탄의 입자 크기 조절에 관한 연구: Carboxyl Group과 Dielectric Constant의 효과

손석희; 김일혁; 이해준; 김중현

Polymer(Korea), Vol.21, No.3, 375-382, May, 1997

Export Citation

수분산성 폴리우레탄의 입자 크기 조절에 관한 연구: Carboxyl Group과 Dielectric Constant의 효과

Particle Size Control of Polyurethane Dispersion:Effect of Carboxyl Group and Dielectric Constant

손석희, 김일혁, 이해준, 김중현

초록

IPDI (isophorone diisocyanate)와 poly(ethylene-adipate) glycol을 반응시켜 폴리우레탄 prepolymer를 제조한 후 DMPA(dimethylol propionic acid)를 가하고, 이를 연속상에 분산시켜 수분산성 폴리우레탄 입자를 제조하였다. 분산 입자들은 carboxyl group이 TEA (triethylamine)와 중화되어 입자간의 상호 정전기적 반발력으로 안정한 입자를 형성하였다. 반응 인자로는 prepolymer 사슬의 친수성기 농도와 연속상에서의 중화 정도를 설정하였다. 친수성기의 농도 변화는 폴리올의 분자량과 사슬연장제를 이용하였고, 중화 정도는 TEA/DMPA 몰비와 분산상의 dielectric constant 변화를 이용하였다. 그 결과 친수성기 농도와 중화 정도가 증가할수록 입자의 안정화 비표면적이 증가하여 입자의 크기는 감소하였다.

The polyurethane prepolymers were prepared from IPDI (isophorone diisocyanate), poly(ethylene-adipate) glycol and DMPA (dimethylol propionic acid). This prepolymers were dispersed in the aqueous phase by neutralization emulsification. The polyurethane dispersions were electrostatically stabilized with carboxyl group incorporated into their particles, which were neutralized by TEA (triethylamine). The reaction parameters were molecular weight of polyol, amount of chain elongation agent, TEA/DMPA mole ratio, and dielectric constant. Due to the enlargement of stabilization site, the particle size decreased with increasing the concentration of carboxyl group and degree of neutralization.

Keywords:neutralization emulsification;dielectric constant;carboxyl group

[References]

Allcock HR, "Contemporary Polymer Chemistry," Prince Hall, New York (1990)
Oertel G, "Polyurethane Hand Book," Hanser, New York (1985)
Hepburn C, "Polyurethane Elastomer," Elsevier Science Publishers, New York (1992)
Woods G, "The ICI Polyurethane Book," ICI Polyurethanes (1987)
U.S. Patent, 4,198,330 (1980)
U.S. Patent, 4,501,852 (1985)
U.S. Patent, 4,705,840 (1985)
Tripak RE, "Water-Borne Polyurethane Ionomer," Water-Borne and higher Solids Coatings Symposium, King Industries, Inc., New Orleans (1990)
Cody RD, "New and Improved Water-Borne Polyurethanes from the TMXDI (META) Aliphatic Isocyanate Family," Water-Borne and Higher Solids Coatings Symposium, King Industries, Inc., New Orleans (1990)
Lee YM, Kim BK, Shin YJ, Cho HH, Polym.(Korea), 16(5), 547 (1992)
Kim BK, Kim TK, Polym.(Korea), 16(5), 609 (1992)
Kim TK, Kim SJ, Kim BK, Polym.(Korea), 16(5), 604 (1992)
Lee JC, Kim BK, Polym.(Korea), 17(6), 687 (1993)
Kim CK, Kim BK, J. Appl. Polym. Sci., 43, 2295 (1991)
Blank WJ, "Non-isocyanate Routes to Polyurethanes," Water-Borne and Higher Solids Coatings Symposium, King Industries, Inc., New Orleans (1990)

[Referenced By]

[1] Allcock HR, "Contemporary Polymer Chemistry," Prince Hall, New York (1990)

[2] Oertel G, "Polyurethane Hand Book," Hanser, New York (1985)

[3] Hepburn C, "Polyurethane Elastomer," Elsevier Science Publishers, New York (1992)

[4] Woods G, "The ICI Polyurethane Book," ICI Polyurethanes (1987)

[5] U.S. Patent, 4,198,330 (1980)

[6] U.S. Patent, 4,501,852 (1985)

[7] U.S. Patent, 4,705,840 (1985)

[8] Tripak RE, "Water-Borne Polyurethane Ionomer," Water-Borne and higher Solids Coatings Symposium, King Industries, Inc., New Orleans (1990)

[9] Cody RD, "New and Improved Water-Borne Polyurethanes from the TMXDI (META) Aliphatic Isocyanate Family," Water-Borne and Higher Solids Coatings Symposium, King Industries, Inc., New Orleans (1990)

[10] Lee YM, Kim BK, Shin YJ, Cho HH, Polym.(Korea), 16(5), 547 (1992)

[11] Kim BK, Kim TK, Polym.(Korea), 16(5), 609 (1992)

[12] Kim TK, Kim SJ, Kim BK, Polym.(Korea), 16(5), 604 (1992)

[13] Lee JC, Kim BK, Polym.(Korea), 17(6), 687 (1993)

[14] Kim CK, Kim BK, J. Appl. Polym. Sci., 43, 2295 (1991)

[15] Blank WJ, "Non-isocyanate Routes to Polyurethanes," Water-Borne and Higher Solids Coatings Symposium, King Industries, Inc., New Orleans (1990)