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:
Jun. 02, 1998
Filed:
Nov. 14, 1996
Applicant:
Inventors:
Herbert Fisch, Wachenheim, DE;
Gunter Pipper, Bad Durkheim, DE;
Jens Rieger, Ludwigshafen, DE;
Martin Laun, Ludwigshafen, DE;
Volker Warzelhan, Weisenheim, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528310 ; 528323 ; 528327 ; 528328 ; 528332 ; 528397 ; 528403 ; 528405 ;
Abstract
Branched polyamides are prepared by mixing A) from 10 to 99.7% by weight of a melt of a polyamide prepolymer having a viscosity number of from 40 to 90 ml/g with B) from 0.3 to 6% by weight of a polybasic carboxylic acid, where the number n of the free carboxylic acid groups is 3.ltoreq.n.ltoreq.10, and also C) from 0 to 80% by weight of further additives and processing aids, where the percentages by weight of the components A) to C) add up to 100%, and subsequently further condensing the mixture in the solid phase.