Polyorganosiloxane 변성 Polyurethane Dispersion의 제조와 그 특성

강두환; 윤영남; Doo Whan Kang; Yong Nan Yin

Applied Chemistry for Engineering, Vol.21, No.1, 46-51, February, 2010

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Polyorganosiloxane 변성 Polyurethane Dispersion의 제조와 그 특성

Preparation and Properties of Polyorganosiloxane Modified Polyurethane Dispersion

강두환 ^†, 윤영남

단국대학교 공과대학 고분자시스템공학과

Doo Whan Kang^†, and Yong Nan Yin

Department of Polymer Science & Engineering, College of Engineering, Dankook University, Yongin 448-701, Korea

E-mail:

초록

양말단에 하이드록시프로필 기를 갖는 폴리올가노실옥산을 합성한 다음 이를 isophorone diisocyanate (IPDI), propylene glycol (PPG) 및 2,2-bis(hydroxymethyl) propionic acid (DMPA)와 함께 공중합하여 폴리올가노실옥산변성 폴리우레탄 중합체(PDMS- PU)를 제조하였다. 이중합체의 양말단에 있는 이소시아네이트기를 butanon oxime으로 blocking시킨 다음 트리에틸아민(TEA)으로 중화시켜 PDMS-PU 수분체를 얻었다. 열분해로 deblocking되는 온도를 측정하였으며 수분산체는 우수한 수분산 안정성을 보였다. 중합 시 NCO/OH의 당량비를 1.12∼1.53으로 하고 DMPA의 함량을 변화시켜 제조한 PDMS-PU 중합체의 수분산체에 대한 분산입자크기를 측정하였으며 반응물에서 DMPA의 함량을 7.2, 13.5, 18.7 mole%로 증가시킴에 따라 입자의 크기는 136, 100, 65 dnm로 감소하는 경향을 나타내었다. DMPA의 함량을 변화시켜 얻은 PDMS- PU 필름의 접촉각 및 접착강도를 측정하였다.

Polyorganosiloxane modified polyurethane (PDMS-PU) polymers were prepared from copolymerization of α,ω-hydroxypropyl terminated polyorganosiloxane with isophorone diisocyanate (IPDI), polypropylene glycol (PPG), and 2,2-bis(hydroxymethyl) propionic acid (DMPA). Hydrophobic polyorganosiloxane was introduced in polyurethane main chain as soft segment block unit. The isocyanate groups in PDMS-PU block copolymer was blocked with 2-butanon oxime and obtained PDMS-PU dispersions in water by neutralizing with triethylamine (TEA). The deblocking temperature of PDMS-PU polymer was measured from thermal analysis. The good stability of the PDMS-PU dispersion was obtained by dispersing into water. PDMS-PU prepolymers were prepared with various contents of DMPA under [NCO]/[OH] = 1.12∼1.53 equivalent ratio. Increasing DMPA from 7.2, 13.4, and 18.7 mole% in preparation of PDMS-PU polymer, particle sizes were decreased from 156, 100, 65 dnm. Also contact angle and adhesive strength were measured.

Keywords:α,ω-hydroxypropyl terminated polyorgarosiloxane;polyorganosiloxane modified polyurethane

[References]

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

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

[3] Chen SA, Hsu TS, Polymer, 34, 2769 (1993)

[4] Macknight WJ, Yang M, J. Polymer Sci., 58, 301

[5] Lee SY, Lee JS, Kim BR, Polymer International, 42, 67 (1997)

[6] Otsuki T, Kakimoto M, Imai Y, J. Polymer Sci., Part A, Polym. Chem., 29, 611 (1991)

[7] Shibayama M, Inoue M, Yamamoto T, Nomura S, Polymer, 31, 349 (1990)

[8] Kang DW, Han MS, Lee SM, Kim YM, Kang HJ, J. Korean Ind. Eng. Chem., 13(6), 531 (2002)

[9] Wynne KJ, Ho T, Prepr. ACS Polym. Mat. Sci., 67, 445 (1992)

[10] Ye Q, Chem. Propellents & Polym. Mat., 5, 7 (2007)

[11] Philips RA, Stevenson CJ, Nagarajan MR, Cooper SJ, J. Polymer Sci., Part A, Polym. Chem., 27, 245 (1989)

[12] Chen RS, Chang CJ, Chang YH, J. Polym. Sci. A: Polym. Chem., 43(16), 3482 (2005)