열경화형 대전방지 코팅액의 배합연구

하진욱; 황공현; Jin Wook Ha; Kong Kyun Whang

Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.1, 27-33, February, 2001

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열경화형 대전방지 코팅액의 배합연구

Formulation of a Thermally Curable Coating Composition with Anti-Static Function

하진욱^†, 황공현¹

순천향대학교 공과대학 화학공학부, 아산 336-745
¹(주)유레이 공과대학 화학공학부, 화성 445-963

Jin Wook Ha^†, and Kong Kyun Whang¹

Division of Material and Chemical Engineering, College of Engineering, Soonchunhyang University, Asan 336-745, Korea
¹URAY Corporation Ltd., Hwaseougn-Kun 445-963, Korea

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초록

긴 사슬의 알킬기를 가진 4차 암모늄염으로서 다수의 하이드록시기(OH)가 있는 대전방지 단량체(Ultramer 5212)를 합성하여 폴리이소시아네이트 및 여러 종류의 폴리올과 반응하여 대전방지 코팅액을 배합하였다. 대전방지 단량체의 첨가량은 배합시 사용한 폴리올의 양을 기준으로 무게비(wt%)로 5부터 30%까지 변화하였다. 열경화 실험은 PET 필름을 사용하여 경화온도 80℃와 160℃에서 수행하였다. 코팅된 PET 필름의 표면저항은 대전방지단량체가 무게비로 10% 첨가될 때까지 감소하였으나 첨가량이 10% 이상이 되었을 때는 오히려 약간 증가하였다. 코팅액 배합시 혼합용매는 코팅액 점도에 큰 영향을 주었으며 코팅액의 점도가 클수록 코팅표면의 투명도는 좋지 않았고 메틸에틸케톤(MEK)이 혼합용매로 가장 적절하다는 것을 알 수 있었다. 코팅액 배합조건 중 폴리올과 폴리이소시아네이트의 비율은 몰비로 1:1일 때가 가장 좋았으며 반응성 대전방지제(Ultramer 5212)의 내수성은 일반 첨가형 대전방지제(LANCOSTAT LI 100)보다 월등히 우수함을 알 수 있었다.

A thermally curable coating composition with anti-static function (Ultramer 5212) was synthesized. It was the 4th ammonium salt that has long chain alkyl and hydroxyl(OH) groups. The anti-static coating agent was formulated with Ultramer 5212 and polyisocyanate along with various polyols. The additive amounts of Ultramer 5212 were varied from 5 to 30 wt% depending on the amount of polyol used. A thermally curable coating was performed on PET film at temperatures of 80 and 160 ℃. Results showed that surface resistance(Ω/㎠) of PET film decreased as the amount of Ultramer 5212 increased up to 10 wt%. However, surface resistance increased slightly when over 10 wt% of Ultramer 5212 was added. Methylethylketone(MEK) was the best solvent to keep the clearance of PET film. Coated Pet film had the optimum physical properties when the mole ratio of polyisocyanate and polyol was 1. Life time test results showed that Ultramer 5212 had much longer anti-static effect than other additives of coating compositions (LANCOSTAT LI 100) which are currently used in the field

Keywords:Thermally curable coating;Coating composition;Anti-static function

[References]

Dieterich D, Prog. Org. Coatings, 9, 281 (1981)
Oldering PKT, Hayward G, "Resins for Surface Coatings", Vol. I, Selective Industrial Training Associates Ltd, London (1987)
Galon RJ, Narayan T, Markors RA, SPI Polyurethane Div., 385 (1988)
Woods G, "The ICI Polyurethane Books", 2nd Ed., John Wiley & Sons, Inc., Chichester (1990)
Jung CH, Park HS, Kim YK, J. Korean Ind. Eng. Chem., 4(1), 54 (1993)
Soto PF, Herraez M, Gozales A, de Saja JA, Polym. Testing, 13, 77 (1994)

[Referenced By]

[1] Dieterich D, Prog. Org. Coatings, 9, 281 (1981)

[2] Oldering PKT, Hayward G, "Resins for Surface Coatings", Vol. I, Selective Industrial Training Associates Ltd, London (1987)

[3] Galon RJ, Narayan T, Markors RA, SPI Polyurethane Div., 385 (1988)

[4] Woods G, "The ICI Polyurethane Books", 2nd Ed., John Wiley & Sons, Inc., Chichester (1990)

[5] Jung CH, Park HS, Kim YK, J. Korean Ind. Eng. Chem., 4(1), 54 (1993)

[6] Soto PF, Herraez M, Gozales A, de Saja JA, Polym. Testing, 13, 77 (1994)