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. 25, 1990
Filed:
Oct. 10, 1989
Applicant:
Inventors:
Klaus Berg, Krefeld, DE;
Guther Weymans, Leverkusen, DE;
Ulrich Grigo, Kempen, DE;
Ludwig Bottenbruch, Krefeld, DE;
Assignee:
Bayer Aktiengesellschaft, Bayerwerk, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
525462 ; 525469 ;
Abstract
This invention relates to halogen-free binary mixtures of two fully aromatic polycarbonates each having a disperse solubility of from 18 to 35 (J/ccm).sup.1/2, in which both polycarbonates are of high molecular weight and each contains not more than 70 mol-% of bisphenol A. The invention further relates to the use of these mixtures for optical data stores and to moulded parts produced from the mixtures.