The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1998
Filed:
Aug. 14, 1996
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A polycarbonate composition comprises (a) a substantially chlorine-atom free, aromatic dihydroxy compound/carbonic diester transesterification polycarbonate, and the following components (b), (c) and (d) in specifically, extremely limited amounts, wherein component (b) is at least one metal selected from an alkali metal and an alkaline earth metal, component (c) is an aromatic monohydroxy compound, and component (d) is at least one member selected from an oligomer having a weight average molecular weight of 1,000 or less and a residual monomer. This polycarbonate composition is substantially free from occurrence of crazing, even when it experiences moist heat, and especially even when it has been recycled. Further, when this polycarbonate composition is continuously injection-molded, not only can the molding be carried out with less necessity of interruption for mold cleaning, but also even when the continuous molding is interrupted for mold cleaning or for other reasons and then restarted, occurrence of unfavorable phenomena (such as deposition of black spots, i.e., carbonized material waste, and development of brown streaks, uneven color and the like) can be effectively suppressed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile