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Molecular formula : C16H22O4
MW : 278.34
CAS No. :84-74-2
nature : a transparent colorless oily liquid. Solidification point -35 ° C, the boiling point of 335 ° C and relative density of 1.045 (25/20 ° C), the refractive index of 1.4926, fire point 202 ° C, the flash point of 171 ° C, the vapor pressure (150 ° C) 146.6Pa, vaporization heat 284.7J / g, heat capacity 1.79J / (g ° C), viscosity (25 ° C) 16.3mPa s. Soluble in common organic solvents and hydrocarbons. 25 ° C in water solubility of 0.03% of the goods in water solubility of 0.4%. - With aromatic odor. Combustible.
Preparation Methods : phthalic anhydride, n-butanol as raw material to sulfuric acid as the catalyst in atmospheric pressure for esterification. After the completion of reaction with alkali solution and washed and then after removing alcohol, finished in Filter Press. Processing a batch and continuous French. The consumption of raw materials fixed : anhydride 540kg / t, n-butanol (95%) 560kg / t.
purposes : for the goods plasticizer. For a variety of highly soluble resin edge. Mainly for PVC processing, giving good products softness. Because of its relatively inexpensive and good processing, domestic use is very wide and very few with the DOP. But out volatile and relatively high water, poor durability of products, to progressively restrict its use. The material is the fine cellulose nitrate by plastic, gel capability. For nitrocellulose coatings, softening a very good role. The stability, resistance to bending, adhesion and waterproof are excellent. In addition, the materials are also used for poly vinyl acetate, alkyd resin, ethyl cellulose and chloroprene rubber plasticizers, also used in the manufacture of paints, adhesives, leather, printing ink, made of safety glass, Fall, dyes, pesticides, solvents spices, fabrics lubricant.
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