Title:
静電荷が低下した光学品質のポリカーボネート及びその製法
Document Type and Number:
Japanese Patent JP3864053
Kind Code:
B2
Abstract:
Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.
Inventors:
Issei Inoue
Hiromi Ishida
Tomoaki Shimoda
Hawks, Theodorus Lambertus
Van Hout, Henrix Hubertus Maria
Margan, Monica M
David Michelle, David Michelle
McClosky, Patrick Joseph
Hiromi Ishida
Tomoaki Shimoda
Hawks, Theodorus Lambertus
Van Hout, Henrix Hubertus Maria
Margan, Monica M
David Michelle, David Michelle
McClosky, Patrick Joseph
Application Number:
JP2000609487A
Publication Date:
December 27, 2006
Filing Date:
March 17, 2000
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
C08G64/30; C08L69/00; C08G64/14; G11B7/253; G11B11/105
Domestic Patent References:
| JP3047831A |
Attorney, Agent or Firm:
Kenichi Matsumoto
Hirokazu Ogura
Nobukazu Ito
Hirokazu Ogura
Nobukazu Ito