JP2000044666A5 - - Google Patents
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- Publication number
- JP2000044666A5 JP2000044666A5 JP1998220391A JP22039198A JP2000044666A5 JP 2000044666 A5 JP2000044666 A5 JP 2000044666A5 JP 1998220391 A JP1998220391 A JP 1998220391A JP 22039198 A JP22039198 A JP 22039198A JP 2000044666 A5 JP2000044666 A5 JP 2000044666A5
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- medium
- intrinsic viscosity
- polyethylene terephthalate
- polycondensation
- 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.)
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- 229920000728 polyester Polymers 0.000 description 10
- -1 polyethylene terephthalate Polymers 0.000 description 5
- 238000006068 polycondensation reaction Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- WERYXYBDKMZEQL-UHFFFAOYSA-N 1,4-Butanediol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 231100000614 Poison Toxicity 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Description
また、特開平9−286849号公報では、溶融重縮合によって得られたポリエステルプレポリマーを冷却固化した後、ペレット化し、これを加熱した1,4−ブタンジオールに導入して、更に固相重縮合することでカルボキシル末端濃度を著しく低減する方法が提案されている。しかしこの方法においては、依然として固相重合時にペレット同士が融着しやすいという問題点があった。 Further, in JP-A 9-286849 discloses, after the polyester prepolymer obtained by melt polycondensation was cold却固of, and pelleted, then introduced into the 1,4-butanediol which was heated, further solid phase A method has been proposed in which the carboxyl terminal concentration is significantly reduced by polycondensation. However, this method still has a problem that pellets are easily fused to each other during solid phase polymerization.
本発明の製造方法において、媒体中に導入するポリエステルは、該ポリエステルペレットの強度等の取り扱い易さの点から、溶融粘度が、該ポリエステルの融点+30℃の温度下にて100ポイズ以上であることが好ましい。また、溶融重縮合における熱分解速度を考慮すると、該ポリエステルがポリエチレンテレフタレート系ポリエステルの場合には固有粘度が0.40〜0.7の範囲、ポリエチレンナフタレート系ポリエステルの場合には固有粘度が0.35〜0.55の範囲、ポリブチレンテレフタレート系ポリエステルの場合には固有粘度が0.55〜1.1の範囲にあるポリエステルを、媒体中に導入することが好ましい。 In the production method of the present invention, the polyester introduced into the medium has a melt viscosity of 100 poisons or more at a temperature of the melting point of the polyester + 30 ° C. from the viewpoint of ease of handling such as the strength of the polyester pellets. Is preferable. Considering the thermal decomposition rate in melt polycondensation, the intrinsic viscosity is in the range of 0.40 to 0.7 when the polyester is a polyethylene terephthalate polyester, and the intrinsic viscosity is 0 when the polyester is a polyethylene naphthalate polyester. It is preferable to introduce the polyester having an intrinsic viscosity in the range of .35 to 0.55, and in the case of polybutylene terephthalate polyester, into the medium.
[比較例2]
実施例1において、溶融プレポリマーとして、固有粘度が0.17、カルボキシル末端基153当量/tonである290℃の溶融ポリエチレンテレフタレートを用い、径1.5mmのノズルより130℃に熱せられた窒素ガス雰囲気下に滴下させ、該ノズルの30cm下の媒体としての130℃のエチレングリコールの液面に滴下し、該媒体中での保持時間を5分間としたこと以外は同様の操作を行った。
ポリエチレンテレフタレートの分子量にはばらつきが生じ、一部チップ割れ、また微粉体が発生した。結果を表1に示す。
[Comparative Example 2]
In Example 1, a molten polyethylene terephthalate having an intrinsic viscosity of 0.17 and a carboxyl end group of 153 equivalents / ton was used as the molten prepolymer, and a nitrogen gas heated to 130 ° C. from a nozzle having a diameter of 1.5 mm was used. The same operation was performed except that the mixture was dropped in an atmosphere, dropped on the liquid surface of ethylene glycol at 130 ° C. as a medium 30 cm below the nozzle, and the holding time in the medium was set to 5 minutes.
The molecular weight of polyethylene terephthalate varied, and some chips cracked and fine powder was generated. The results are shown in Table 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22039198A JP3799167B2 (en) | 1998-08-04 | 1998-08-04 | Polyester manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22039198A JP3799167B2 (en) | 1998-08-04 | 1998-08-04 | Polyester manufacturing method |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2000044666A JP2000044666A (en) | 2000-02-15 |
JP2000044666A5 true JP2000044666A5 (en) | 2005-06-16 |
JP3799167B2 JP3799167B2 (en) | 2006-07-19 |
Family
ID=16750390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22039198A Expired - Fee Related JP3799167B2 (en) | 1998-08-04 | 1998-08-04 | Polyester manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3799167B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7329723B2 (en) | 2003-09-18 | 2008-02-12 | Eastman Chemical Company | Thermal crystallization of polyester pellets in liquid |
CA2482056A1 (en) | 2003-10-10 | 2005-04-10 | Eastman Chemical Company | Thermal crystallization of a molten polyester polymer in a fluid |
US20060047102A1 (en) | 2004-09-02 | 2006-03-02 | Stephen Weinhold | Spheroidal polyester polymer particles |
US7875184B2 (en) | 2005-09-22 | 2011-01-25 | Eastman Chemical Company | Crystallized pellet/liquid separator |
-
1998
- 1998-08-04 JP JP22039198A patent/JP3799167B2/en not_active Expired - Fee Related
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