POLYESTER RESIN

To provide a polyester resin for film good in film moldability, less in debris and extremely excellent in physical properties.SOLUTION: There is provided a polyester resin containing a compound of at least one kind of elements selected from titanium elements in the periodic table IV group, a bivalen...

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Bibliographische Detailangaben
Hauptverfasser: YATSUGI YUTAKA, KAWAGUCHI TAKAAKI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a polyester resin for film good in film moldability, less in debris and extremely excellent in physical properties.SOLUTION: There is provided a polyester resin containing a compound of at least one kind of elements selected from titanium elements in the periodic table IV group, a bivalent metal compound, and a phosphorus compound, and satisfying following (1) to (7). (1) intrinsic viscosity:0.80 dl/g or less. (2) content of cyclic trimer: 5000 ppm or less. (3) volume intrinsic resistance value: 20×10Ω cm or less. (4) Δb value after melting and holding at 290°C for 1.5 hr: 13 or less. (5) 0.4≤P/M≤0.7 (6) 0.25≤M≤0.49 (7) P/T≤3.1, wherein P, M and T represent followings. P:content of phosphorus atom (mol/ton). M:content of the bivalent metal atom (mol/ton). T:content of the titanium metal elements in the periodic table IV group (mol/ton).SELECTED DRAWING: None 【課題】フィルム成形性が良好で、異物が少なく物性が非常に優れているフィルム用ポリエステル樹脂を提供する。【解決手段】周期表第4族のチタン族元素から選ばれる少なくとも1種の元素の化合物、2価の金属化合物、およびリン化合物を含有し、以下の(1)〜(7)を満足するポリエステル樹脂。(1)固有粘度:0.80dl/g以下(2)環状三量体の含有量:5000ppm以下(3)体積固有抵抗値:20×107Ω・cm以下(4)290℃で1.5時間溶融保持後のΔb値:13以下(5)0.4 ≦ P/M ≦ 0.7(6)0.25 ≦ M ≦ 0.49(7)P/T ≦3.1ただし、P、M、Tは以下を表す。P:リン原子の含有量(モル/トン)M:2価の金属原子の含有量(モル/トン)T:周期表第4族のチタン族金属原子の含有量(モル/トン)【選択図】なし