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:
Nov. 10, 1992
Filed:
Jul. 11, 1991
Applicant:
Inventors:
Gerhard Fennhoff, Willich, DE;
Uwe Westeppe, Mettmann, DE;
Werner Nouvertne, Krefeld, DE;
Karsten-Josef Idel, Krefeld, DE;
Edgar Leitz, Dormagen, DE;
Ulrich Grigo, Kempen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
524281 ; 525147 ; 526281 ; 526313 ; 526314 ;
Abstract
A carbonate corresponding to formula (I) ##STR1## in which R is aromatically bound polystyrene moiety and --O--D--O-- is a diphenolate moiety in which --D-- is a divalent group containing 6 to 30 carbon atoms and r is 0 or 1 is disclosed. The carbonate is useful as a flow aid for thermoplastic molding compositions.