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:
Sep. 18, 2012
Filed:
Mar. 19, 2007
Yanfei Liu, Shanghai, CN;
Frank Oliver Heinrich Pirrung, Binzen, DE;
Haiyang Yu, Shanghai, CN;
Huiguang Kou, Shanghai, CN;
Yanfei Liu, Shanghai, CN;
Frank Oliver Heinrich Pirrung, Binzen, DE;
Haiyang Yu, Shanghai, CN;
Huiguang Kou, Shanghai, CN;
BASF SE, Ludwigshafen, DE;
Abstract
This invention refers to a novel process for the synthesis of polyethylene imine (PEI)-based pigment dispersants characterized by a 'grafting from' approach, allowing the manufacture of solvent based dispersant systems. The polyethylene imine (PEI)-based pigment dispersant can be presented by the formula (I) X-(T)-P-(T)-H wherein P is a polyethyleneimine (PEI) back-bone; T is a residue —CO-A-O— wherein A is C-Calkylene optionally substituted with C-Calkyl with the proviso that each linkage between P and T is an amide bond and each linkage between X and T is an ester bond, X is a modifier or terminator residue R—CO— wherein R is a linear or branched, saturated or unsaturated alkanecarboxylic acids having from 1 to 22 carbon atoms or an unsaturated fatty acid residue or a hydroxycarboxylic residue or a polyester residue obtained from polycondensation of hydroxycarboxylic acids, or an acid terminated polyether; n, m independently are a number from 1 to 100.