Bergvik Kemi Ab

Giuseppe Canestri

A dispersing agent for dispersing solid particles in an organic liquid having the composition ##STR1## wherein ##STR2## is the residue of a polyester chain having a molecular weight of at least 1700, derived from a hydroxycarboxylic acid containing 16-22 carbon atoms, ##STR3## is the residue of a mono or polyamide having up to 12 amido bonds, which is amino terminated in both ends and wherein R.sub.1 and R.sub.2 are each independently hydrogen or alkyl or alkenyl containing up to 20 carbon atoms; Z is a salt of a carboxylic acid containing 8-18 carbon atoms and a diamine NHR.sub.3 --T--NH.sub.2 wherein T is alkylene or alkenylene containing 2-12 carbon atoms and optionally comprising one or more oxygen or nitrogen bridges and R.sub.3 is hydrogen or alkyl or alkenyl containing up to 20 carbon atoms; Q is a carboxylic acid containing 8-18 carbon atoms or a diamine NHR.sub.3 --T--NH.sub.2, wherein T and R.sub.3 are defined as above. Said dispersing agent can be used for preparing an easily dispersable pigment.

Polyesteramide dispersing agent

A dispersing agent of the formula ##STR1## wherein ##STR2## is the residue of a polyester chain having a molecular weight of at least 1000; ##STR3## is the residue of an aliphatic or aromatic amino acid; and --O--A--O--is the residue of a metal salt Me(OH).sub.2, Me(OCOR.sub.1).sub.2 or Me(OH).sub.2 --OCOR.sub.1, wherein R.sub.1.COO--is the residue of a carboxylic acid, optionally in combination with an aliphatic diamine NHR.sub.2 --T--NH.sub.2, wherein R.sub.2 is hydrogen or C.sub.1-20 alkyl, and a salt of said diamine and a residual carboxylic acid deriving from the polyester mixture. The dispersing agents are useful for dispersing pigments and dyes in organic liquids.

Metal containing polymeric dispersing agent

A polymeric diamino triazine dispersing agent comprising a compound the essential parts of which are

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Via Parisano, Italy

Giuseppe Canestri