| 摘要 |
This new polyester is composed of complete aromatic polyester repeated structure as main chain and has improved crystalization speed and good heat resistance. The polyester composition is made by adding 0.05-10 wt.% polyester oligomer in polyethylene terephthalate of 0.4-1.5 dl/g of specific viscosity. The above complete aromatic polyester oligomer of formula (I) comprises 50 mol% 4-hydroxy- and 3-hydroxy-benzoic acid; 25 mol% terephthalic acid and isophthalic acid. In formula, (x+X):(z+1):(m+n) = 2:1:1; and p is integer of 2-30. After adding oligomer, inorganic fillers selected from talc, titanium dioxide, calcium carbonate and kaolin; and lubricant from sodium stearate, magnesium stearate, and n-pentyl glycol dibenzoate are added for improving crystalizing speed.
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