Title:
分岐状ポリカーボネート樹脂
Document Type and Number:
Japanese Patent JP4473446
Kind Code:
B2
Abstract:
A tetrahydric phenol having a specific structure, such as alpha , alpha '-dimethyl- alpha , alpha , alpha ', alpha '-tetrakis(4-hydroxyphenyl)-p-xylene, is used as the branching agent in producing a branched polycarbonate resin. The resin has a branching agent content (branching agent/(dihydric phenol + chain terminator + branching agent) x 100) of from 0.01 to 0.4 mol%, and an intrinsic viscosity Ä eta Ü of from 0.5 to 0.6, and is substantially free from crosslinks. The resin has such a reduced branching agent content and has good melt characteristics including high melt tension. It exhibits improved moldability in blow molding, etc., and gives good moldings especially having improved appearances and color tone.
Inventors:
Yasuhiro Ishikawa
Masaya Okamoto
Masaya Okamoto
Application Number:
JP2000523258A
Publication Date:
June 02, 2010
Filing Date:
November 20, 1998
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
C08G64/14
Domestic Patent References:
| JP55162728A | ||||
| JP9281720A |
Foreign References:
| WO1999010406A1 | ||||
| US4415725 |
Attorney, Agent or Firm:
Tamotsu Otani