Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The Properties of Different Polyols for Paint to Polyisocyanate

도료용 폴리올 종류에 따른 폴리이소시아네이트와의 물성

  • Seo, Seok-Hwan (Department of Industrial Chemistry, Pukyong National University) ;
  • Suh, Cha-Soo (Department of Industrial Chemistry, Pukyong National University) ;
  • Park, Jin-Hwan (Department of Industrial Chemistry, Pukyong National University)
  • 서석환 (부경대학교 응용화학공학부 공업화학과) ;
  • 서차수 (부경대학교 응용화학공학부 공업화학과) ;
  • 박진환 (부경대학교 응용화학공학부 공업화학과)
  • Received : 2008.08.20
  • Accepted : 2008.09.08
  • Published : 2008.10.10
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Abstract

To achieve the ideal performances of paint film, resins and hardeners have to be chosen and designed in a proper way depending on the exposure circumstance of substrate and the requested physical properties. Six different kinds of clear paints were made in this experiment using alkyd polyol, polyester polyol, polyester modified acrylic polyol and another 3 acrylic polyol resins whose $T_g$ and OH value were partially modified. Then the tests for chemical, physical, and mechanical properties were measured after forming the paint films using aliphatic and aromatic polyisocyanate. The viscosity and elasticity of paint film were then measured in terms of gel point and $tan{\delta}$ using Rheometer and DMA. Through this viscoelastic characteristic test of polyurethane resin, we were able to choose the adequate resins and hardeners which are the most important in the top and primer painting system of urethane paint and, as a result of observing the physical, mechanical, and chemical properties of paint film by urethane, we have finally reached the conclusion that we could apply the proper polyol to top and primer paint for developing the polyurethane paint system.

도막의 기능은 피도물의 노출 환경 및 요구되는 물성에 따라 수지종류와 경화제는 적절하게 설계되어야 그 기능을 충분히 발휘할 수 있다. 본 연구에서는 동일한 OH 함량을 가진 알키드 폴리올, 폴리에스테르 폴리올, 폴리에스테르 변성아크릴 폴리올 등과 $T_g$ 및 OH 함량이 다른 아크릴 폴리올 수지 등 6가지 폴리올수지를 사용하고, 경화제는 알리파틱 이소시아네트와 아로마틱 이소시아네트를 사용하였다. 총 12종류의 투명도료를 제조 후, 화학적, 기계적 물성시험과 DMA 및 Rheometer를 이용하여 폴리올 수지타입 및 경화제 타입에 따른 폴리우레탄 도료의 종류별 도막물성 및 작업성을 관찰하였다. 그 결과 폴리올수지에 있어서 각각 다른 물리적, 화학적 성질을 가지는 도료개발 및 도장작업성의 개선 시 적절한 폴리올수지 종류 및 경화제를 선택하여 상 하도의 물성 및 도장 시스템에 합리적으로 응용할 수 있는 결과를 얻었다.

Keywords

Acknowledgement

Supported by : 조광페인트 기술연구소

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