Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
권호 표지

Preparation and Adhesion of One Part Room Temperature Curable Alkoxy Type Silicone Sealant

일액형 알코올형 실리콘 실란트의 제조 및 접착 물성

  • Kim, Dae-Jun (Laboratory of Wood-based Composites & Adhesion Science, School of Biological Resources and Materials Engineering, Seoul National University) ;
  • Park, Young-Jun (Laboratory of Wood-based Composites & Adhesion Science, School of Biological Resources and Materials Engineering, Seoul National University) ;
  • Kim, Hyun-Joong (Laboratory of Wood-based Composites & Adhesion Science, School of Biological Resources and Materials Engineering, Seoul National University) ;
  • Lee, Bong Woo (Technical Research Center, Kunsul Chemical Ind. Co. Ltd.) ;
  • Han, Jae Chul (Technical Research Center, Kunsul Chemical Ind. Co. Ltd.)
  • 김대준 (서울대학교 생물자원공학부 목질복합재료 및 접착과학연구실) ;
  • 박영준 (서울대학교 생물자원공학부 목질복합재료 및 접착과학연구실) ;
  • 김현중 (서울대학교 생물자원공학부 목질복합재료 및 접착과학연구실) ;
  • 이봉우 (건설화학(주) 기술연구소) ;
  • 한재철 (건설화학(주) 기술연구소)
  • Received : 2001.07.29
  • Accepted : 2001.09.17
  • Published : 2001.12.21
Download PDF
⟨ Previous Next ⟩

Abstract

Silicone sealants are composed of polymer, plasticizer, crosslinker, catalyst and filler. Types and compositions of components are effected on sealant performances. In recent, use of alkoxy type silicone sealant increased due to environmental advantage. In this study, we investigated effects of component types and ratios on one-part room temperature curable alkoxy type silicone sealant preparation and adhesion properties. Alkoxy type silicone sealants were prepared with various PDMS (polydimethylsiloxane) viscosities. In addition, the effect of plasticizer, crosslinkers, and catalyst on sealant obtained from by mixture of PDMS viscosities of 20000 and 80000 was investigated. Reaction temperature on change of mixing time was observed, and then proper crosslinking systems were found. Adhesion (properties) of silicone sealants were measured. In the sealants preparation, stable reaction was achieved by adjusting composition variance ratio in the sealant mixture temperature below $40^{\circ}C$. The adhesion properties of sealant differ from substrate composition. The order of adhesion strength was glass/glass > glass/aluminum > aluminum/aluminum system. The elongation of sealant was increased as polymer viscosity and plasticizer content increased. The strength was increased as crosslinker and plasticizer decreased, while catalyst increased.

실리콘 실란트는 실리콘폴리머, 가소제(plasticizer), 가교제(crosslinker), 충전제(filler), 촉매(catalyst), 첨가제(additive) 등으로 제조할 수 있으며, 실란트의 실용특성에는 각 제조변수의 종류와 혼합비율이 크게 영향한다. 알코올형 실리콘 실란트는 최근들어 환경적인 이점 때문에 그 사용이 늘고 있다. 본 연구에서는 상온경화형 일액형 알코올형 실리콘 실란트를 PDMS(polydimethylsiloxane)의 점도를 달리하여 제조한 후 그 접착특성을 평가하였다. 또한 점도 20000과 80000 cps의 PDMS를 혼합 사용하고 가교제, 가소제, 촉매 등의 함량을 변화시켜가면서 실란트를 제조하고 접착특성을 평가하였다. 또한 각 실란트의 제조과정 중의 반응온도 변화를 기록하여 적절한 제조조건을 얻도록 하였다. 실란트 제조시 혼합물의 온도가 $40^{\circ}C$ 이하가 되도록 제조변수의 조성을 조절하여 적합한 물성의 실란트를 제조할 수 있었다. 피착재에 따라 접착력이 달라졌으며, 유리/유리 > 유리/알루미늄 > 알루미늄/알루미늄 순으로 나타났다. 실란트의 신장률은 폴리머 점도와 가소제의 함량 증가에 따라 증가하였으며, 강도는 가교제와 가소제 함량 감소와 촉매함량 증가에 따라 증가하였다.

Keywords