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JPS56127626A - Preparation of polyethylene terephthalate - Google Patents

Preparation of polyethylene terephthalate

Info

Publication number
JPS56127626A
JPS56127626A JP5865080A JP5865080A JPS56127626A JP S56127626 A JPS56127626 A JP S56127626A JP 5865080 A JP5865080 A JP 5865080A JP 5865080 A JP5865080 A JP 5865080A JP S56127626 A JPS56127626 A JP S56127626A
Authority
JP
Japan
Prior art keywords
compound
polyethylene terephthalate
glycol
soluble
lithium
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.)
Granted
Application number
JP5865080A
Other languages
Japanese (ja)
Other versions
JPS6256894B2 (en
Inventor
Tsuyoshi Oota
Iwao Tanaka
Tomoyuki Minami
Masahiko Mogi
Saburo Fujita
Yoen Ichikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP5865080A priority Critical patent/JPS56127626A/en
Publication of JPS56127626A publication Critical patent/JPS56127626A/en
Publication of JPS6256894B2 publication Critical patent/JPS6256894B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To obtain polyethylene terephthalate suitable as a film for a magnetic tape, having improved slipperiness and surface conditions, by adding a soluble lithium compound, calcium compound and a phosphorus compound to the polycondensation step of the polyethylene terephthalate.
CONSTITUTION: At a point of time from the completion of ester interchange reaction or esterification reaction of terephthalic acid (derivative) with ethylene glycol to an intrinsic viscosity of 0.2, preferably 0.01W0.25wt% glycol-soluble lithium compound, e.g. lithium chloride, and preferably 0.01W0.3wt% glycol-soluble calcium compound, at a molar ratio between the lithium compound and the calcium compound of preferably 1/1W10/1 are added to the polycondensation step. Furthermore, preferably 0.05W0.3wt% trivalent or pentavalent phosphorus compound, e.g. phosphoric acid, or both are added thereto to complete the polycondensation. Thus, the aimed polyethylene terephthalate is obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP5865080A 1980-05-06 1980-05-06 Preparation of polyethylene terephthalate Granted JPS56127626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5865080A JPS56127626A (en) 1980-05-06 1980-05-06 Preparation of polyethylene terephthalate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5865080A JPS56127626A (en) 1980-05-06 1980-05-06 Preparation of polyethylene terephthalate

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP50037805A Division JPS5843422B2 (en) 1975-03-31 1975-03-31 polyester composition

Publications (2)

Publication Number Publication Date
JPS56127626A true JPS56127626A (en) 1981-10-06
JPS6256894B2 JPS6256894B2 (en) 1987-11-27

Family

ID=13090454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5865080A Granted JPS56127626A (en) 1980-05-06 1980-05-06 Preparation of polyethylene terephthalate

Country Status (1)

Country Link
JP (1) JPS56127626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930855A (en) * 1982-08-10 1984-02-18 Nippon Ester Co Ltd Polyester composition and its preparation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822041C1 (en) * 1988-06-30 1989-08-17 Rasmussen Gmbh, 6457 Maintal, De

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4861556A (en) * 1971-12-04 1973-08-29
JPS50101494A (en) * 1974-01-14 1975-08-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4861556A (en) * 1971-12-04 1973-08-29
JPS50101494A (en) * 1974-01-14 1975-08-12

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930855A (en) * 1982-08-10 1984-02-18 Nippon Ester Co Ltd Polyester composition and its preparation
JPH0452298B2 (en) * 1982-08-10 1992-08-21 Nippon Ester Co Ltd

Also Published As

Publication number Publication date
JPS6256894B2 (en) 1987-11-27

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