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Products obtainable by salt formation from polyamines and the use thereof as dispersing agents for pigments and extenders

  • US 6,111,054 A
  • Filed: 06/26/1998
  • Issued: 08/29/2000
  • Est. Priority Date: 07/26/1997
  • Status: Expired due to Term
First Claim
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1. A dispersing agent for pigments or extenders comprising a salt of an amine-functional compound and an acid,wherein the amine-functional compound contains at least three amino groups and is selected from the group consisting of an aliphatic, linear or branched polyamine, a modified polymine, a homo-, co- or block polymer having amine group substituents or a mixture thereof;

  • wherein the acid is a phosphoric acid ester of the formula (HO)3-n PO(OR1)n where n=1 or 2, a sulphonic acid of the formula HOSO2 R2, a sulphonic acid ester of the formula HOSO3 R2 or a mixture thereof wherein R1 and R2 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, and R1 and R2 can be the same or different;

    wherein the aliphatic linear or branched polyamine is selected from the group consisting of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, penethylenehexamine, hexaethyleneheptamine, a linear condensate of the formula NH2 -(C2 H4 NH)n -C2 H4 -NH2 where n is greater than 5 up to an integer providing a number average molecular weight of 1 million, a branched (C2 -C4) alkylene amine containing tertiary amine groups with a number average molecular weight up to 1 million, a branched poly(C2 -C4)alkylene imine containing tertiary amine groups with a number average molecular weight up to 1 million, and any mixture thereof;

    wherein, the modified polyamine is selected from the group consisting of a reaction product of an aliphatic linear or branched polyamine with a mono- or polyisocyanate, an epoxy compound, or a cyclic carbonate;

    a Michael reaction product of an aliphatic linear or branched polyamine with an α



    -unsaturated carbonyl compound or an α



    -unsaturated carboxylic ester or an α



    -unsaturated nitrile; and

    an alkylated or quaternized, aliphatic, linear or branched polyamine or combination thereof, with the proviso that the modified polyamine contains at least three amino groups which are convertable into salt groups;

    and wherein the homo-, co- or block polymer is selected from the group consisting of a homo-, co- or block polymer of an aminoalkyl (meth)acrylate, and a homo-, co- or block polymer of an amine or nitrogen heterocycle substituted vinyl compound, the homo-, co- or block polymer having a number average molecular weight up to 1 million.

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