Title:
POLYESTER RESIN
Document Type and Number:
Japanese Patent JP3717392
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a polyester resin suitable for a food container, excellent in color tone, having little byproducts such as acetaldehyde and a cyclic trimer and using titanium that is excellent in environmental safety as a catalyst element.
SOLUTION: The polyester resin is obtained by polymerizing a dicarboxylic acid component mainly comprising an aromatic dicarboxylic acid or its ester forming derivative and a diol component mainly comprising ethylene glycol in the presence of a catalyst containing a titanium compound to obtain a polyester resin having following properties: titanium atom content, 0.002-1.0 mol/t, intrinsic viscosity, ≥0.70 dl/g, color tone (b) value, ≤4, and acetaldehyde content, ≤5.0 ppm.
Inventors:
Yoshihiro Fujimori
Narui Masahiro
Narui Masahiro
Application Number:
JP2000339918A
Publication Date:
November 16, 2005
Filing Date:
November 08, 2000
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C08G63/85; (IPC1-7): C08G63/85
Domestic Patent References:
| JP7048439A | ||||
| JP2001081161A | ||||
| JP2001048966A | ||||
| JP2000226445A | ||||
| JP2000226444A | ||||
| JP2000219730A | ||||
| JP2000219726A |
Foreign References:
| WO1997047675A1 |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Hasegawa Soji
Hasegawa Soji
Previous Patent: BOLT AND FASTENING DEVICE WITH THIS BOLT
Next Patent: MOLDING MATERIAL SUCTION DEVICE AND METHOD
Next Patent: MOLDING MATERIAL SUCTION DEVICE AND METHOD