Title:
PRODUCTION OF POLYESTER
Document Type and Number:
Japanese Patent JP3021209
Kind Code:
B2
Abstract:
PURPOSE: To obtain a polyester excellent in hue and heat resistance, etc., hardly having acetaldehyde content and causing no whitening in forming bottles by adding specific two kinds of compounds to a reactional system in producing polyethylene naphthalene dicaroxylate.
CONSTITUTION: In producing polyester by reacting a dicarboxylic acid component consisting essentially of a lower alkyl ester of naphthalene-2,6-dicarboxylic acid with a glycol component consisting essentially of ethylene glycol, (A) a metallic compound (preferably NaOH, etc.) selected from an alkali metal compound and an alkaline earth metal compound and (B) an ammonium compound (preferably hydroxytetramethyl ammonium) of the formula (R1 to R4 are H, alkyl, etc.; A is anion residue) is added to the reactional system at arbitrary stage until the reaction is finished. Furthermore, the compound A is preferably used in an amount of 4×10-4 to 9×10-4 based on 1mol dicarboxylic acid component and the compound B is preferably used in an amount of 0.2×10-4 to 1×10-4mol based on 1mol dicarboxylic acid component.
More Like This:
| JP2000351890 | HOLLOW CONTAINER |
| JP5074215 | Biaxially oriented laminated film |
| JP2014187263 | SOLAR CELL REAR SURFACE PROTECTION POLYESTER FILM |
Inventors:
Takuo Nakao
Takatoshi Kuratsuji
Takatoshi Kuratsuji
Application Number:
JP27004292A
Publication Date:
March 15, 2000
Filing Date:
October 08, 1992
Export Citation:
Assignee:
Teijin Limited
International Classes:
C08G63/189; C08G63/181; C08G63/78; C08G63/83; (IPC1-7): C08G63/189; C08G63/83
Domestic Patent References:
| JP63183921A |
Attorney, Agent or Firm:
Masataka Oshima
Previous Patent: 近紫外線照射発光の無機蛍光体を用いた氷床及び氷柱
Next Patent: CRYSTAL OSCILLATOR CIRCUIT AND BROADCAST RECEIVER USING SAME
Next Patent: CRYSTAL OSCILLATOR CIRCUIT AND BROADCAST RECEIVER USING SAME