72 results about "Naphthalocyanine" patented technology

The present invention provides an IR-absorbing naphthalocyanine dye of formula (I):whereinM is selected from Si(A1)(A2), Ge(A1)(A2), Ga(A1), Mg, Al(A1), TiO, Ti(A1)(A2), ZrO, Zr(A1)(A2), Vo, V(A1)(A2), Mn, Mn(A1), Fe, Fe(A1), Co, Ni, Cu, Zn, Sn, Sn(A1)(A2), Pb, Pb(A1)(A2), Pd and Pt;A1 and A2 are axial ligands, which may be the same or different, and are selected from —OH, halogen, —OR3, a hydrophilic ligand and / or a ligand suitable for reducing cofacial interactions;R1 and R2 are selected from H or C1-12alkoxy;R3 is selected from C1-12alkyl, C5-12aryl, C5-12arylalkyl or Si(Rx)(Ry)(Rz); andRx, Ry and Rz may be the same or different and are selected from C1-12alkyl, C5-12aryl, C5-12arylalkyl, C1-12 alkoxy, C5-12aryloxy or C5-12arylalkoxy;W is a hydrophilic group;n1 is 0, 1, 2 or 3;n2 is 0, 1, 2 or 3;n3 is 0, 1, 2 or 3;n4 is 0, 1, 2 or 3;provided that at least one of n1, n2, n3 or n4 is greater than 0.Dyes of this type are especially suitable for use in netpage and Hyperlabel systems.

An IR-absorbing phthalocyanine dye suitable for formulation in a solvent-based or oil-based ink vehicle is disclosed. The phthalocyanine comprises one or more sulfonate groups and a counterion of at least one sulfonate group is a phosphonium cation. Phosphonium salts of sulfonated gallium naphthalocyanines exemplify such dyes.

There is provided an IR-absorbing naphthalocyanine dye of formula (I):whereinM is Ga(A1);A1 is an axial ligand selected from —OH, halogen, —OR3, —OC(O)R4 or —O(CH2CH2O)eRe wherein e is an integer from 2 to 10 and Re is H, C1-8 alkyl or C(O)C1-8 alkyl;R1 and R2 may be the same or different and are selected from hydrogen or C1-12 alkoxy;R3 is selected from C1-12 alkyl, C5-12 aryl, C5-12 arylalkyl or Si(Rx)(Ry)(Rz);R4 is selected from C1-12 alkyl, C5-12 aryl or C5-12 arylalkyl;Rx, Ry and Rz may be the same or different and are selected from C1-12 alkyl, C5-12 aryl, C5-12 arylalkyl, C1-12 alkoxy, C5-12 aryloxy or C5-12 arylalkoxy; andeach B is independently selected from a base, wherein BH+ has a pKa of between 4 and 9. The dye is suitable for use in IR-absorbing inkjet inks, providing compatibility with known CMYK inks together with an optimally red-shifted λmax.

There is provided an aqueous formulation comprising an IR-absorbing naphthalocyanine dye of formula (II):or a salt form thereof, wherein:M is Ga(A1);A1 is an axial ligand selected from —OH, halogen, —OR3, —OC(O)R4 or —O(CH2CH2O)eRe wherein e is an integer from 2 to 10 and Re is H, C1-8 alkyl or C(O)C1-8 alkyl;R1 and R2 may be the same or different and are selected from hydrogen or C1-12 alkoxy;R3 is selected from C1-12 alkyl, C5-12 aryl, C5-12 arylalkyl or Si(Rx)(Ry)(Rz);R4 is selected from C1-12 alkyl, C5-12 aryl or C5-12 arylalkyl; andRx, Ry and Rz may be the same or different and are selected from C1-12 alkyl, C5-12 aryl, C5-12 arylalkyl, C1-12 alkoxy, C5-12 aryloxy or C5-12 arylalkoxy;The formulation has a pH in the range of 3.5 to 7 and is particularly suitable for use as an IR-absorbing inkjet ink, providing compatibility with known CMYK inks together with an optimally red-shifted λmax.

This invention relates to stable colorants of high extinction coefficient and high solubility or dispersibility for an electrophoretic, magnetophoretic or electromagnetophoretic display. More particularly, it relates to stable colorants for a microcup-based electrophoretic or electromagnetophoretic display the cells of which are filled with charged and / or magnetic particles dispersed in a halogenated, preferably a fluorinated, solvent. The use of the stable colorants allows the display to be of superior contrast ratio and longevity, and suitable for high-quality imagery applications.