US6949138B2 — Pigment dispersion liquid, manufacturing process …

Claim 1

Independent Claim 155 words

A pigment dispersion liquid comprising pigment particles and Pigment derivatives, which are derived from the pigment, have the same nucleus as the pigment and polar group, dispersed in a dispersion medium, wherein the pigment derivatives are anionic; wherein the difference (D 90 −D 10 ) between D 10 and D 10 being not more than 25 rim, and wherein D 90 and D 10 represent the primary particle size that the pigment particles having a primary particle size up to and including D 90 account for 90% by number of the total pigment particles, and the particle size that the pigment particles having a primary particle size up to and including D 10 account for 10% by number of the total pigment particles, respectively, in the integral of the primary particle size distribution function dG=f(D)×dD of the pigment particles in which G is a particle number (%) and D is a primary particle size (nm).

Claim 2

Dependent Claim 155 words

A pigment dispersion liquid comprising pigment particles and Pigment derivatives, which are derived from the pigment, have the same nucleus as the pigment and polar group, dispersed in a dispersion medium, wherein the pigment derivatives are anionic; wherein the difference (D 90 −D 10 ) between D 10 and D 10 being not more than 25 rim, and wherein D 90 and D 10 represent the primary particle size that the pigment particles having a primary particle size up to and including D 90 account for 90% by number of the total pigment particles, and the particle size that the pigment particles having a primary particle size up to and including D 10 account for 10% by number of the total pigment particles, respectively, in the integral of the primary particle size distribution function dG=f(D)×dD of the pigment particles in which G is a particle number (%) and D is a primary particle size (nm).

Claim 3

Dependent Claim 24 words

The pigment dispersion liquid of claim 1 , wherein the average primary particle size of the pigment particles is not more than 30 nm.

Claim 4

Dependent Claim 14 words

The pigment dispersion liquid of claim 1 , further comprising a water soluble polymer.

Claim 5

Dependent Claim 162 words

A pigment dispersion liguid comprising: pigment particles dispersed in a dispersion medium: pigment derivatives, which are derived from the pigment, having the same nucleus as the pigment and polar group; and a water soluble polymer being adsorbed on the surface of the pigment particles; wherein the difference (D 90 −D 10 ) between D 90 and D 10 being not more than 25 nm, and wherein D 90 and D 10 represent the primary particle size that the pigment particles having a primary particle size up to and including D 90 account for 90% by number of the total pigment particles, and the particle size that the pigment particles having a primary particle size up to and including D 10 account for 10% by number of the total pigment particles, respectively, in the integral of the primary particle size distribution function dG=f(D)×dD of the pigment particles in which G is a particle number (%) and D is a primary particle size (nm).

Claim 6

Dependent Claim 162 words

A pigment dispersion liguid comprising: pigment particles dispersed in a dispersion medium: pigment derivatives, which are derived from the pigment, having the same nucleus as the pigment and polar group; and a water soluble polymer being adsorbed on the surface of the pigment particles; wherein the difference (D 90 −D 10 ) between D 90 and D 10 being not more than 25 nm, and wherein D 90 and D 10 represent the primary particle size that the pigment particles having a primary particle size up to and including D 90 account for 90% by number of the total pigment particles, and the particle size that the pigment particles having a primary particle size up to and including D 10 account for 10% by number of the total pigment particles, respectively, in the integral of the primary particle size distribution function dG=f(D)×dD of the pigment particles in which G is a particle number (%) and D is a primary particle size (nm).

Claim 7

Dependent Claim 17 words

The pigment dispersion liquid of claim 4 , wherein the water soluble polymer has an anionic group.

Claim 8

Dependent Claim 20 words

The pigment dispersion liquid of claim 1 , wherein a surfactant is adsorbed on the surface of the pigment particles.

Claim 9

Dependent Claim 27 words

The pigment dispersion liquid of claim 1 , wherein the dispersion medium is an aqueous medium containing water in an amount of at least 50% by weight.

Claim 10

Dependent Claim 44 words

The pigment dispersion dispersion claim 1 , wherein the polar group is selected from the group consisting of a sulfonic acid group, a carboxyl group, a phosphate group, a borate group, a hydroxy group, and a group in the form of a salt thereof.

Claim 11

Dependent Claim 168 words

A pigment dispersion liquid comprising, pigment particles and pigment derivatives, which are derived from the pigment, having the same nucleus as the pigment and polar group, dispersed in a dispersion medium, wherein the pigment derivative is present in an amount of 0.1 to 50 mol% based on the pigment dispersion, wherein the difference (D 90 −D 10 ) between D 90 and D 10 being not more than 25 nm, and wherein D 90 and D 10 represent the primary particle size that the pigment particles having a primary particle size up to and including D 90 account for 90% by number of the total pigment particles, and the particle size that the pigment particles having a primary particle size up to and including D 10 account for 10% by number of the total pigment particles, respectively, in the integral of the primary particle size distribution function dG=f(D)×dD of the pigment particles in which G is a particle number (%) and D is a primary particle size (nm).

Claim 12

Dependent Claim 168 words

A pigment dispersion liquid comprising, pigment particles and pigment derivatives, which are derived from the pigment, having the same nucleus as the pigment and polar group, dispersed in a dispersion medium, wherein the pigment derivative is present in an amount of 0.1 to 50 mol% based on the pigment dispersion, wherein the difference (D 90 −D 10 ) between D 90 and D 10 being not more than 25 nm, and wherein D 90 and D 10 represent the primary particle size that the pigment particles having a primary particle size up to and including D 90 account for 90% by number of the total pigment particles, and the particle size that the pigment particles having a primary particle size up to and including D 10 account for 10% by number of the total pigment particles, respectively, in the integral of the primary particle size distribution function dG=f(D)×dD of the pigment particles in which G is a particle number (%) and D is a primary particle size (nm).

Claim 13

Dependent Claim 14 words

The pigment dispersion liquid of claim 9 , wherein the pigment derivatives are anionic.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2008-09-26	2009-03-28	2009-09-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2012-09-26	2013-03-28	2013-09-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2016-09-26	2017-03-28	2017-09-27	$7700.00	Window Closed / Lapsed

Pigment dispersion liquid, manufacturing process thereof, pigment ink for ink jetting, and ink jet image recording method employing the same

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