摘要:
There is provided an IR-absorbing naphthalocyanine dye of formula (I): wherein M is Ga(A1); A1 is an axial ligand selected from -OH, halogen, -OR3, -OC(O)R4 or -O(CH2CH2O)OR6 wherein e is an integer from 2 to 10 and R6 is H, C1-8 aIkyI or C(O)C1-8 alkyl; R1 and R2 may be the some 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-I2 aryloxy or C5-12 arylakoxy, and each B is independently selected from a base, wherein BH+ has a pKa of between 4 and 9. The dye is particularly suitable for use in IR-absorbing inkjet inks, providing compatibility with known CMYK inks together with an optimally red-shifted λmax.
摘要:
A phthalocyanine phthalocyanine salt 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 an ammonium cation comprising at least 15 carbon atoms. Ammonium salts of sulfonated gallium naphthalocyanines exemplify such phthalocyanine salts. Formula (5)
摘要:
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.
摘要:
A salt of a sulfonated dye comprising an ammonium cation as a counterion. The ammonium cation comprises at least 3 hydroxyl groups. The salt is useful in reducing kogation in thermal inkjet printheads. One example of these salts is the compound of formula (II): wherein M is Ga(OH); and each of Z1+, Z2+, Z3+ and Z4+ is protonated 2,2-bis(hydroxymethyl)- 2,2',2' '-nitrilotriethanol.
摘要:
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)eR6 wherein e is an integer from 2 to 10 and R6 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 C1-2 alkoxy; R3 is selected from C1-2 alkyl, C5-I2 aryl, C5-12 arylalkyl or Si(Rx)(Ry)(Rz); R4 is selected from C1-12 alkyl, C5-12 aryl or C5-12 arylalkyl; and 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, C1-12 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