The Effects of Polyurethane Resin on the Water Stability of HAC/PVA Based MDF Cement Composites

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J. Korean Ceram. Soc. > Volume 34(10); 1997 > Article

Journal of the Korean Ceramic Society 1997;34(10): 1037.

Polyurethane 첨가에 의한 HAC/PVA계 MDF 시멘트 복합재료의 수분안정성 영향

박춘근, 김태진, 김병권, 엄태형, 노준석¹, 최상흘¹

쌍용중앙연구소
¹한양대학교 무기재료공학과

The Effects of Polyurethane Resin on the Water Stability of HAC/PVA Based MDF Cement Composites

ABSTRACT

Mechanical properties and water stability of HAC/PVA based MDF cement composite were investigated using polyurethane(PU) resin, silane coupling agent and various PVA. The results were as follows ; The flexural strength of MDF cement composite increased as increasing with PVA content. Low-viscosity PVA developed higher flexural strength than high-viscosity PVA under a drying curing condition. But the strength of water immersed specimen decreased. Water stability of MDF cement improved as increasing with content of PU. Consequently, water stability of polyurethane 7% added MDF cement was about 2 times higher than that of the controlled specimen. Furthermore, the strength and water stability of diamine group based silane couling agent in using MDF cement increased and improved dramatically.

Key words: MDF cement, Cement composite, Water stability, Polyurethane resin