Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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Synthesis of flame retardant acrylic emulsion pressure sensitive adhesives by co-polymerization with phosphoric flame retardant monomer

인계 난연 단량체와의 공중합을 통한 난연성 수성 아크릴 에멀젼 점착제 제조

  • Jeon, Min Seok (Korea Institute of Footwear & Leather Technology) ;
  • Jung, Ji Hun (Korea Institute of Footwear & Leather Technology) ;
  • Kim, Gu Ni (Korea Institute of Footwear & Leather Technology)
  • 전민석 (한국신발피혁연구원 하이브리드소재연구실) ;
  • 정지훈 (한국신발피혁연구원 하이브리드소재연구실) ;
  • 김구니 (한국신발피혁연구원 하이브리드소재연구실)
  • Received : 2019.09.27
  • Accepted : 2019.12.23
  • Published : 2019.12.31
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Abstract

In this work, flame retardant acrylic emulsion pressure sensitive adhesives were newly polymerized combining phosphorous flame retardant monomer and acrylic monomer like butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, and 2-hydroxyethyl methacrylate. The process of polymerization showed 100% of conversion at solid content of 65%, and viscosity of acrylic emulsion was increased up to 5500 cps when phosphorous flame retardant monomer was added into acrylic emulsion. The structure of flame retardant acrylic emulsion was identified using FT-IR and thermal properties like glass transition temperature (Tg) were checked by differential scanning calorimeter (DSC). Acrylic emulsion without phosphorous flame retardant monomer had Tg of -44.1℃ and peel strength of 2,100gf/inch, however, flame retardant acrylic emulsion showed maximum Tg (-31.4℃) and peel strength of 200gf/inch when 15 part of phosphorous flame retardant monomer was added. Flammability test was also conducted to confirm the application of flame retardant acrylic emulsion as the flame retardant addtive.

본 연구에서는 인계 난연성 단량체를 점착성 아크릴 단량체인 butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, 2-hydroxyethyl methacrylate와 고형분 65%에서 공중합을 진행하여 난연성 수성 아크릴 에멀젼 점착제를 합성하였다. 이때 전환율은 100%를 보이며 인계 난연 단량체의 첨가량에 따라 점착제의 점도에 차이가 발생하였고 최대 5500cps의 점도를 나타내었다. FT-IR로 아크릴 점착제의 구조분석을 진행하였고, differential scanning calorimeter (DSC) 열적 특성을 측정하였다. 인계 난연 단량체의 첨가에 따라 유리전이온도(Tg)는 미첨가시 -44.1℃에서 최대첨가량 15part에서 -31.4℃로 증가하였다. 박리강도는 미첨가시 2100gf/inch였으며 첨가량 15part에서는 200gf/inch를 나타내었고 난연성 수성 아크릴 에멀젼 점착제의 방염성을 평가하여 난연성 점착제로서의 특성 확인하였다.

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