Title:
POLYBUTYLENE TEREPHTHALATE
Document Type and Number:
WIPO Patent Application WO/2005/012391
Kind Code:
A1
Abstract:
A polybutylene terephthalate (PBT) which contains a titanium catalyst in a content up to 150 ppm as a titanium atom and has a terminal methoxycarbonyl group content of 0.5 μ eq/g or less, wherein a value (&agr ) indicating the proportion of an active titanium in the titanium catalyst is 0.8 or more, which is represented by the following formula (I): &agr = X/[M] wherein [M] represents the concentration (ppm) of a titanium atom in PBT, and X represents an activity parameter defined by a specific formula. The above PBT is excellent in color tone, the resistance to hydrolysis, thermal stability, transparency and formability and is reduced in the content of a foreign matter, and thus can be suitably used for a film, a monofilament, a fiber, an electric or electronic part, an automobile part or the like.
Inventors:
YAMAMOTO MASANORI (JP)
UESAKA TAKAHIRO (JP)
UESAKA TAKAHIRO (JP)
Application Number:
PCT/JP2004/008432
Publication Date:
February 10, 2005
Filing Date:
June 16, 2004
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
YAMAMOTO MASANORI (JP)
UESAKA TAKAHIRO (JP)
YAMAMOTO MASANORI (JP)
UESAKA TAKAHIRO (JP)
International Classes:
C08G63/85; (IPC1-7): C08G63/85
Foreign References:
| JP2002284868A | 2002-10-03 | |||
| JP2004091756A | 2004-03-25 |
Attorney, Agent or Firm:
Okada, Kazuhiko (6F Kudan Kangyo Bldg.,, 10-1, Kudan-Kita 1-chome, Chiyoda-ku Tokyo, JP)
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