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:
Aug. 29, 2000
Filed:
Jun. 26, 1998
Karlheinz Haubennestel, Wesel, DE;
Ulrich Orth, Wesel, DE;
Wolfgang Pritschins, Wesel, DE;
Udo Krappe, Wesel, DE;
BYK-Chemie GmbH, Wesel, DE;
Abstract
The present invention relates to a dispersing agent for pigments or extenders which is obtainable by salt formation from an amine-functional compound by means of an acid, wherein a polyamine which contains at least three amino groups and which is from the group comprising aliphatic linear polyamines and/or aliphatic branched polyamines and/or modified polyamines, with the proviso that after modification three amino groups which can be converted into salts are still present per molecule, or a mixture of polyamines such as these, is used as the amine-functional compound, and wherein a substance from the group comprising phosphoric acid esters of general formula: (HO).sub.3-n PO(OR.sup.1).sub.n where n=1 or 2, sulphonic acids of general formula HOSO.sub.2 R.sup.2 and acidic sulphuric acid esters of general formula HOSO.sub.3 R.sup.2 is used as the acid, wherein R.sup.1 and R.sup.2 represent an alkyl, aryl or aralkyl radical containing at least 5 C atoms and/or a radical of an oxyalkylated alcohol with a number average molecular weight between 100 and 5000 g/mole and/or a radical containing at least one carboxylic acid ester group and/or a urethane group with a number average molecular weight between 100 and 5000 g/mole, or a mixture of substances such as these, wherein R.sup.1 and R.sup.2 can be the same or different. The invention also relates to the use of the dispersing agent and to a method of producing it.