Toyo Ink Manufacturing Company

Shigeyuki Ehashi

Hiromitsu Katsura

Junichi Tsuchida

Kenichi Kakimoto

Seiji Sawada

Seiji Aida

Yasuharu Iida

Akio Sato

Ichiro Toyoda

Motohiko Kashioka

Hisashi Uraki

Makoto Sakamoto

Water-based ink-jet recording fluid

A pigment composition consisting of 100 parts by weight of a pigment, and from 0.1 to 30 parts by weight of a pigment dispersant of formula ##STR1## in which Q is (a) an anthraquinone dye or pigment radical, (b) an azo dye or pigment radical, (c) a benzimidazolone dye or pigment radical, (d) a phthalocyanine dye or pigment radical, (e) a quinacridone dye or pigment radical, (f) a dioxazine dye or pigment radical, (g) an anthrapyrimidine dye or pigment radical, (h) an anthanthrone dye or pigment radical, (i) an indanthrone dye or pigment radical, (j) a falvanthrone dye or pigment radical, (k) a pyranthrone dye or pigment radical, (l) a perinone dye or pigment radical, (m) a perylene dye or pigment or (n) a thioindigo dye or pigment radical; X is a direct bonds, --CH.sub.2 --; ##STR2## Y.sub.1 is NH or --O--; Z is in which Y.sub.2 is --NH-- or --O--, or --NH--X--Q when n is 1; R.sub.1 and R.sub.2 are independently an alkyl group containing 1-18 carbon atoms, or are jointly combined to form a piperidine, pyrrolidine, pipecoline or morpholine ring with the nitrogen atom to which they are attached; m is an integer of 1 to 6; and n is an integer of 1 to 4. The pigment compositions exhibit improved fluidity, superior stability and gloss.

Pigment composition

There is provided a pigment composition comprising 100 parts by weight of a pigment and from 0.3 to 30 parts by weight of a colorless or slightly colored aromatic compound having the following general formula (I) ##STR1## wherein Q represents a residue of an aromatic polycyclic compound which is joined directly or through A to --SO.sub.2 -- radical of the compound of the formula (I), A represents a member selected from the group consisting of --O--, ##STR2## --S--, --CO--, --SO.sub.2 --, ##STR3## a divalent phenylene residue and a combination thereof, in which R.sub.4 and R.sub.5 represent, independently, a hydrogen atom or an alkyl group containing from 1 to 4 carbon atoms, R.sub.1 and R.sub.2 represent, independently, a hydrogen atom or an alkyl group containing from 1 to 4 carbon atoms, or together form a heterocyclic ring together with N* in the formula (I), R.sub.3 represents a hydrogen atom or an alkyl group containing from 1 to 20 carbon atoms, m is an integer of from 1 to 6 and n is an integer of from 1 to 3, as well as the use of such a pigment composition to color polyolefins, polyesters, vinyl resins, offset printing ink vehicles, gravure printing inks, nitrocellulose lacquers, room temperature drying or baking paints, urethane resin paints and the like.

Pigment compositions and use thereof

A pigment composition is disclosed which includes a pigment and a coloring compound of the general formula (I), ##STR1## wherein Q represents a residue of a coloring compound other than phthalocyanine, X represents --SO.sub.2 -- or --CO--, m and n represent, respectively, an integer of from 1 to 4 and an integer of from 1 to 6, R represents a hydrogen atom, an alkyl group having from 1 to 20 carbon atoms or an alkenyl group having from 2 to 20 carbon atoms, and R.sub.1 and R.sub.2 represent, independently, a hydrogen atom, a substituted or unsubstituted alkyl group having from 1 to 20 carbon atoms or a substituted or unsubstituted alkenyl group having from 2 to 20 carbon atoms, or R.sub.1 and R.sub.2 together form a heterocyclic ring which contains a nitrogen, oxygen or sulfur atom therein.

Pigment compositions

Growing community of inventors

Kawagoe, Japan

Shigeyuki Ehashi