Polyamino acid dispersants

B - Operations – Transporting – 01 – F

Patent

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B01F 17/30 (2006.01) A61K 8/04 (2006.01) A61K 8/64 (2006.01) A61Q 5/00 (2006.01) A61Q 5/02 (2006.01) A61Q 19/10 (2006.01) C09D 17/00 (2006.01) A61K 7/075 (1995.01) A61K 7/08 (1995.01) A61K 7/50 (1995.01)

Patent

CA 2106400

Polyamino acids of the formulae (I); poly (X)n poly (Y)m and (II). In formula (I) each X independently is aspartic acid, glutamic acid, phosphoserine, phosphohomoserine, phosphotyrosine, or phosphothreonine, each Y independently is alanine,leucine, isoleucine, valine, glycine or other non polar. amino acid residues, n is 2 to 60, m is 2 to 60, and n + m is > 5, and wherein poly (X)n may contain up to 10% of the Y residues and poly (Y)m may contain up to 10% of the X residues, and salts thereof;and in formula (II): poly (X')a poly (Y')b each X' independently is aspartate, glutamate, glutamine, asparagine, or anionic derivatives of these amino acids, or phosphoserine, each Y' independently is a phosphorylated amino acid such as phosphoserine, phosphohomoserine, phosphotyrosine. phosphothreonine, phosphoglutamine, phosphoasparagine or mixtures of these residues, a is 2 to 150, b is 1 to 3, and a + b is > 5, and salts of these peptides; are effective as dispersing agents for minerals in aqueous media and for stabilizing aqueous suspensions of minerals.

Des acides polyaminés des formules (I); poly (X)n poly (Y)m et (II). Dans la formule (I), chaque X indépendamment est de l'acide aspartique, de l'acide glutamique, de la phosphosérine, de la phosphohomosérine, de la phosphotyrosine, ou de la phosphothréonine, chaque Y indépendamment est de l'alanine, de la leucine, de l'isoleucine, de la valine, de la glycine ou autre résidus d'acides aminés non polaires, n est 2 à 60, m est 2 à 60, et n + m est > 5, et où poly (X)n peut contenir jusqu'à 10 % des résidus Y et poly (Y)m peut contenir jusqu'à 10 % des résidus X et des sels de ceux-ci; et dans la formule (II): poly (X')a poly (Y')b chaque X' indépendamment est de l'aspartate, du glutamate, de la glutamine, de l'asparagine, ou des dérivés anioniques de ces acides aminés, ou de la phosphosérine, chaque Y' indépendamment est un acide aminé phosphorylé comme la phosphosérine, la phosphohomosérine, la phosphotyrosine, la phosphothréonine, la phosphoglutamine, la phosphoasparagine ou des mélanges de ces résidus, a est de 2 à 150, b est de 1 à 3, et a + b est > 5, et des sels de ces peptides; sont efficaces comme agents dispersants pour les minéraux dans des milieux aqueux et pour stabiliser les suspensions aqueuses des minéraux.

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