Polyurethane based inks for writing instruments

Details Polyurethane based inks for writing instruments Polyurethane based inks for writing instruments

C - Chemistry, Metallurgy

09

D

C09D 11/16 (2006.01) C08L 75/04 (2006.01) C09D 11/18 (2006.01)

Patent

CA 2449585

A non-erasable ink composition suitable for use in writing instruments is described comprising an isocyanate free thermoplastic polyurethane resin, a colorant and an organic solvent. The ink composition may also include a second resin, plasticizers, antioxidants, corrosion inhibitors, lubricants, chemical dispersants, and surfactants. The inks of the present invention exhibit a smooth writing performance and non-seepage.

L'invention concerne une composition d'encre non effaçable convenant aux instruments d'écriture. Cette composition contient une résine de polyuréthane thermoplastique exempte d'isocyanate, un colorant et un solvant organique. Cette composition d'encre peut également comprendre une seconde résine, des plastifiants, des antioxydants, des inhibiteurs de corrosion, des lubrifiants, des dispersants chimiques et des tensioactifs. Par ailleurs, les encres de l'invention possèdent des performances de non égouttage et d'écriture fluide.

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