Title:
POLYACETAL BLOCK COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2001/009213
Kind Code:
A1
Abstract:
A polyacetal block copolymer of the ABA type which has in the backbone a liquid hydrogenated polybutadiene block in which both ends having a specific monomer structure have been hydroxyalkylated; and a polyacetal resin composition comprising the block copolymer and a specific polymer or inorganic filler. The block copolymer and resin composition can satisfy all of the four properties required of large-diameter gear materials, i.e., (1) suitability for fast-cycle molding (high productivity), (2) high roundness, (3) excellent dimensional stability, and (4) excellent durability. They are useful as a material for large-diameter gears having a pitch diameter of 60 mm or larger.
Inventors:
NIINO MASAHIKO (JP)
NAKAMURA HIDEKI (JP)
KOMATSU SUMIO (JP)
NAKAMURA HIDEKI (JP)
KOMATSU SUMIO (JP)
Application Number:
PCT/JP2000/005019
Publication Date:
February 08, 2001
Filing Date:
July 27, 2000
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
NIINO MASAHIKO (JP)
NAKAMURA HIDEKI (JP)
KOMATSU SUMIO (JP)
NIINO MASAHIKO (JP)
NAKAMURA HIDEKI (JP)
KOMATSU SUMIO (JP)
International Classes:
C08G2/38; C08L59/04; (IPC1-7): C08G2/38; C08J5/00; C08L59/04; C08L101/00
Foreign References:
| JPH04306215A | 1992-10-29 | |||
| JPS60104116A | 1985-06-08 |
Attorney, Agent or Firm:
Asamura, Kiyoshi (New Ohtemachi Bldg. 2-1, Ohtemachi 2-chome Chiyoda-ku Tokyo, JP)
Download PDF: