lsophoron diisocyanate (IPDI)-based polyester polyurethane (PU) dispersion in water were prepared in a prepolymer mixing process. Dimethylol propionic acid(DMPA), triethylamine (TEA), and triethylene tetramine (TETA) were respectively used as potential anionic center. neutralizing agent, and chain extender. Two types of chain extender I. e., butanediol(BD) and neopentyl glycol(NPG), were used in PU forming reactions. The effects of type and extent of chain extension were systematically analyzed in terms of particle size, and physical properties of the emulsion cast films.

lsophoron diisocyanate(IPDI), poly(tetramethylene adipate) glycol(PTAd) 및 dimethylolpropionic acid(DMPA) 등으로부터 polyester polyurethane (PU)을 제조, 이를 triethylamine (TEA)으로 중화시킨 후 물로 분산, 수상에서 triethylene tetramine (TETA)으로 쇄연장 시킴으로써 안정된 수분산성 PU를 제조하였다. 특히 PU 합성과정에서 두 종류의 쇄연장제(butanediol 및 neopentyl glycol)를 사용, 이들의 함량이 유화입경 및 emulsion cast film의 물리적 성질에 미치는 영향을 검토하였다.

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