Abstract: The synthesis methods of aliphatic alcohol-based terephthalate were studied using terephthalic acid and saturated aliphatic alcohol (C₄, C₆, C₈, C₁₀ and C₁₄) as raw materials. And the physicochemical properties such as crystallization points, densities, and the flash points et al. were contrasted. The results indicated that the reactions of aliphatic alcohols of C₄ and C₆ with terephthalic acid at ordinary pressure and low temperature were difficult, and the aliphatic alcohols of C₈, C₁₀ and C₁₄ could easily react with terephthalic acid under catalysis. The flash point of butylene terephthalate (C₄) was 180 ℃. The melting (crystallization) points of alcohol and ester (C₁₄) were 38 ℃ and 67 ℃, respectively, but it was not convenient for the operation and use. While terephthalic esters of C₈ and C₁₀ aliphatic alcohols were between liquid-solid junction, and the flash points were not less than 210 ℃, they were suitable raw material for the synthesis of terephthalic acid esters plasticizer.

Key words: plasticizer, terephthalic acid, terephthalic, aliphatic alcohol