C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 3/37 (2006.01) C08G 69/10 (2006.01) C08G 73/10 (2006.01)
Patent
CA 2174224
11 The use of polyaspartic acid prepared by polycondensation of aspartic acid in the presence of phosphoric acid in a molar ratio of from 1 : 0.05 to 1 : 10 at temperatures of at least 120°C to give polysuccinimide, and subsequent hydrolysis of the polysuc- cinimide with bases to give at least partially neutralized poly- aspartic acid, as additive to detergents and cleaners in amounts of from 0.1 to 10% by weight, and detergents and cleaners which contain polyaspartic acids prepared in the presence of phosphoric acid.
L'invention concerne l'utilisation d'acide polyaspartique comme additif dans des détergents et des nettoyants, dans des proportions comprises entre 0,1 et 10 % en poids, ainsi que des détergents et des nettoyants qui contiennent des acides polyaspartiques préparés en présence d'acide phosphorique. L'acide polyaspartique est obtenu par polycondensation d'acide aspartique en présence d'acide phosphorique dans un rapport molaire de 1:0,05 à 1:10, à des températures d'au moins 120 ~C, ce qui produit du polysuccinimide, soumis ensuite à une hydrolyse avec des bases pour donner lieu à de l'acide polyaspartique neutralisé au moins en partie.
Baur Richard
Kroner Matthias
Kud Alexander
Schornick Gunnar
Schwendemann Volker
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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