C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/00 (2006.01)
Patent
CA 2432652
A colored liquid composition of the invention for a highlighter comprises a coloring element and water. The water content by weight lies in the range 10% to 30%. In addition, the composition comprises at least 40% of another liquid component, other than water, having surface tension greater than 40 mN/m. In a variant, the coloring element is a tracer solvent having a fluorescent appearance under basic pH, in particular hydroxypyrenetrisulfonic acid, the pH of the composition lying in the range 8 to 9, and the component having surface tension greater than 40 mN/m is triethanolamine. Under such circumstances, the composition contains an acid to neutralize the triethanolamine in part in order to obtain the basic pH, for example hydrochloric acid.
La composition liquide colorée pour surligneur de l'invention comprend un élément coloré et de l'eau, la proportion d'eau en poids étant comprise entre 10 et 30%. De plus il comprend au moins 40% d'un composant liquide ayant une tension de surface supérieure à 40mN/m. Dans une variante, l'élément coloré est un solvant traceur à aspect fluorescent à pH basique, notamment l'acide hydroxypyrènétrisulfonique, le pH de la composition est compris entre 8 et 9, et le composant à tension de surface supérieure à 40mN/m est la triéthanolamine. Dans ce cas la composition contient un acide pour neutraliser partiellement la triéthanolamine pour obtenir le pH basique, par exemple de l'acide chlorhydrique.
Bethouart Carine
Duez Jose
Conte
Sim & Mcburney
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