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Preparation and Properties of Eco-friendly Waterborne Polyurethane-urea Primer for Thermoplastic Polypropylene Applied to Automobile Interiors

자동차 내장재용 열가소성 폴리프로필렌에 적용되는 선처리제용 친환경 수분산 폴리우레탄-우레아의 제조 및 성질

  • Shin, Jong Sub (Korea Institute of Footwear & Leather Technology) ;
  • Park, Jin Myeong (Department of Organic Material Science and Engineering, Pusan National University) ;
  • Lee, Young Hee (Department of Organic Material Science and Engineering, Pusan National University) ;
  • Kim, Han Do (Department of Organic Material Science and Engineering, Pusan National University)
  • 신종섭 (한국신발피혁연구원) ;
  • 박진명 (부산대학교 유기소재시스템공학과) ;
  • 이영희 (부산대학교 유기소재시스템공학과) ;
  • 김한도 (부산대학교 유기소재시스템공학과)
  • Received : 2014.07.07
  • Accepted : 2014.09.19
  • Published : 2014.09.30

Abstract

The significance of thermoplastic polyolefin polypropylene (PP) lies in its potential to replace polyvinyl chloride (PVC), the most widely used material for automobile interiors (door trim, dash board), which discharges harmful compounds in certain conditions. Another benefit of PP (0.855 amorphous - 0.946 crystalline $g/cm^3$) is its low density compared to that of PVC ($1.1-1.45g/cm^3$), which reduces vehicle weight. Market demand for eco-friendly water-based adhesive/coating material is rising significantly as a substitute for solvent-based adhesive/coating material which emits VOC and causes harmful working conditions. Under such context, in this study, a series of eco-friendly waterborne polyurethane-urea primer (a paint product that allows finishing paint to adhere much better than if it were used alone) for hydrophobic PP were prepared from different mix of DMPA content, NCO/OH molar ratio, various wt% of silicone diol and various soft segment content, among which DMPA of 21 mole %, NCO/OH molar ratio of 1.2, modified silicone diol of 5 wt% and soft segment content of 73 wt% led to good adhesion strength. Additionally, the incorporation of optimum content of additives (0.5 wt% dispersing agent, 0.5 wt% levelling agent, 1.5 wt% antifoaming agent, 3.0 wt% matting agent) into the optimum waterborne polyurethane-urea also enabled good stability, levelling, antifoaming and non-glossy.

Acknowledgement

Supported by : 부산대학교

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