JPS56118420A - Production of polyester - Google Patents
Production of polyesterInfo
- Publication number
- JPS56118420A JPS56118420A JP2156680A JP2156680A JPS56118420A JP S56118420 A JPS56118420 A JP S56118420A JP 2156680 A JP2156680 A JP 2156680A JP 2156680 A JP2156680 A JP 2156680A JP S56118420 A JPS56118420 A JP S56118420A
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- low
- cyclic oligomers
- heated
- cyclic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To obtain at low cost a polyester which has low cyclic oligomer content and produces molded articles of good quality, by a method wherein the polyester is heated in a solid state in the presence of water to partially hydrolyze low-molecular substances contained in the polyester.
CONSTITUTION: When the amount of low-molecular cyclic oligomers, which is contained in a polyester contg. polyethylene terephthalate and ethylene terephthalate group as the main components, is reduced, the fine particles of the polyester having an instrinsic viscosity of pref. 0.3W1 are heated in a range of 140°C to the melting point thereof and contacted with steam to partially hydrolyze the cyclic oligomers. The reaction is completed at a point at which the content of the cyclic oligomers becomes lower than 1% and the instrinsic viscosity of the polyester is not lowered to 0.1 or below, whereby the desired polyester is obtd.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2156680A JPS56118420A (en) | 1980-02-25 | 1980-02-25 | Production of polyester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2156680A JPS56118420A (en) | 1980-02-25 | 1980-02-25 | Production of polyester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56118420A true JPS56118420A (en) | 1981-09-17 |
Family
ID=12058565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2156680A Pending JPS56118420A (en) | 1980-02-25 | 1980-02-25 | Production of polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56118420A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH037725A (en) * | 1989-03-31 | 1991-01-14 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
JPH0347830A (en) * | 1989-03-31 | 1991-02-28 | Mitsui Petrochem Ind Ltd | Production of polyethylene terephthalate |
JPH0372524A (en) * | 1989-05-31 | 1991-03-27 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
JPH0372523A (en) * | 1989-05-31 | 1991-03-27 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
JPH03174441A (en) * | 1989-03-31 | 1991-07-29 | Mitsui Petrochem Ind Ltd | Method for treating polyethylene terephthalate |
JPH03215521A (en) * | 1989-03-31 | 1991-09-20 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
US6184010B1 (en) | 1996-01-22 | 2001-02-06 | Novo Nordisk A/S | Enzymatic hydrolysis of cyclic oligomers |
WO2004016669A3 (en) * | 2002-08-16 | 2005-12-29 | Novozymes North America Inc | Process for enzymatic hydrolysis of cyclic oligomers |
US7192545B2 (en) | 2003-10-10 | 2007-03-20 | Eastman Chemical Company | Thermal crystallization of a molten polyester polymer in a fluid |
US7329723B2 (en) | 2003-09-18 | 2008-02-12 | Eastman Chemical Company | Thermal crystallization of polyester pellets in liquid |
US7875184B2 (en) | 2005-09-22 | 2011-01-25 | Eastman Chemical Company | Crystallized pellet/liquid separator |
US8022168B2 (en) | 2004-09-02 | 2011-09-20 | Grupo Petrotexmex, S.A. de C.V. | Spheroidal polyester polymer particles |
-
1980
- 1980-02-25 JP JP2156680A patent/JPS56118420A/en active Pending
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH037725A (en) * | 1989-03-31 | 1991-01-14 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
JPH0347830A (en) * | 1989-03-31 | 1991-02-28 | Mitsui Petrochem Ind Ltd | Production of polyethylene terephthalate |
JPH03174441A (en) * | 1989-03-31 | 1991-07-29 | Mitsui Petrochem Ind Ltd | Method for treating polyethylene terephthalate |
JPH03215521A (en) * | 1989-03-31 | 1991-09-20 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
JPH0372524A (en) * | 1989-05-31 | 1991-03-27 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
JPH0372523A (en) * | 1989-05-31 | 1991-03-27 | Mitsui Petrochem Ind Ltd | Polyethylene terephthalate |
US6548278B1 (en) | 1996-01-22 | 2003-04-15 | Novozymes A/S | Enzymatic hydrolysis of cyclic oligomers |
CN1089774C (en) * | 1996-01-22 | 2002-08-28 | 诺沃奇梅兹有限公司 | Enzymatic hydrolysis of cyclic low polymer |
US6184010B1 (en) | 1996-01-22 | 2001-02-06 | Novo Nordisk A/S | Enzymatic hydrolysis of cyclic oligomers |
US7183086B2 (en) | 1996-01-22 | 2007-02-27 | Novozymes A/S | Enzymatic hydrolysis of cyclic oligomers |
WO2004016669A3 (en) * | 2002-08-16 | 2005-12-29 | Novozymes North America Inc | Process for enzymatic hydrolysis of cyclic oligomers |
US7329723B2 (en) | 2003-09-18 | 2008-02-12 | Eastman Chemical Company | Thermal crystallization of polyester pellets in liquid |
US7674877B2 (en) | 2003-09-18 | 2010-03-09 | Eastman Chemical Company | Thermal crystallization of polyester pellets in liquid |
US7192545B2 (en) | 2003-10-10 | 2007-03-20 | Eastman Chemical Company | Thermal crystallization of a molten polyester polymer in a fluid |
US8039581B2 (en) | 2003-10-10 | 2011-10-18 | Grupo Petrotemex, S.A. De C.V. | Thermal crystallization of a molten polyester polymer in a fluid |
US8309683B2 (en) | 2003-10-10 | 2012-11-13 | Grupo Petrotemex, S.A. De C.V. | Thermal crystallization of a molten polyester polymer in a fluid |
US8022168B2 (en) | 2004-09-02 | 2011-09-20 | Grupo Petrotexmex, S.A. de C.V. | Spheroidal polyester polymer particles |
US7875184B2 (en) | 2005-09-22 | 2011-01-25 | Eastman Chemical Company | Crystallized pellet/liquid separator |
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