US6613136B1 — Recording ink composition and ink-jet printing me…

Claim 1

Independent Claim 220 words

A recording ink composition comprising: a colorant insoluble and dispersible in water, water, a water-soluble organic solvent, a wetting agent, 2-ethyl-1,3-hexanediol, and a surfactant selected from the group consisting of surfactants of formulas (I) to (V): R 1 —O—(CH 2 CH 2 O) m CH 2 COO − M + (I) wherein R 1 is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, and m is an integer of 3 to 12, wherein R 2 is a branched alkyl group having 5 to 16 carbon atoms, and M − is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, R—(OCH 2 CH 2 ) n OH (IV) wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, and wherein R′ is a carbon chain having 6 to 14 carbon atoms, and p and q are each an integer of 20 or less.

Claim 2

Dependent Claim 220 words

A recording ink composition comprising: a colorant insoluble and dispersible in water, water, a water-soluble organic solvent, a wetting agent, 2-ethyl-1,3-hexanediol, and a surfactant selected from the group consisting of surfactants of formulas (I) to (V): R 1 —O—(CH 2 CH 2 O) m CH 2 COO − M + (I) wherein R 1 is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, and m is an integer of 3 to 12, wherein R 2 is a branched alkyl group having 5 to 16 carbon atoms, and M − is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, R—(OCH 2 CH 2 ) n OH (IV) wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, and wherein R′ is a carbon chain having 6 to 14 carbon atoms, and p and q are each an integer of 20 or less.

Claim 3

Dependent Claim 33 words

The recording ink composition as claimed in claim 1 , wherein said 2-ethyl-1,3-hexanediol is contained in an amount of 0.1 to 7.0 wt. % of the total weight of said recording ink composition.

Claim 4

Dependent Claim 33 words

The recording ink composition as claimed in claim 1 , wherein said surfactant is contained in an amount of 0.1 to 5.0 wt. % of the total weight of said recording ink composition.

Claim 5

Dependent Claim 219 words

The recording ink composition as claimed in claim 1 , wherein, in formulas (I) and (II), said alkali metal cation represented by M + is selected from the group consisting of N + and Li − ; said quaternary ammonium cation represented by M + is a cation represented by formula (VI), wherein R 3 to R 6 are each selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and a halogenated alkyl group having 1 to 4 carbon atoms; said quaternary phosphonium cation represented by M + is a cation represented by formula (VII), wherein R 13 to R 16 are each selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, and a halogenated alkyl group having 1 to 4 carbon atoms; and said alkanol amine cation represented by M + is a cation represented by formula (VIII), wherein at least one of R 23 to R 26 is a hydroxyalkyl group having 1 to 4 carbon atoms, and the other is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and a halogenated alkyl group having 1 to 4 carbon atoms.

Claim 6

Dependent Claim 43 words

The recording ink composition as claimed in claim 1 , wherein said water-soluble organic solvent comprises at least one selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,5-pentanediol, tetraethylene glycol, and hexylene glycol.

Claim 7

Dependent Claim 38 words

The recording ink composition as claimed in claim 5 , wherein said wetting agent is glycerin, and the ratio by weight of said wetting agent to said water-soluble organic solvent is in a range of (10:1) to (1:10).

Claim 8

Dependent Claim 46 words

The recording ink composition as claimed in claim 5 , wherein said wetting agent is glycerin, and said water-soluble organic solvent is diethylene glycol, with the ratio by weight of said wetting agent to said water-soluble organic solvent being in a range of (4:1) to (1:4).

Claim 9

Dependent Claim 43 words

The recording ink composition as claimed in claim 1 , wherein a mixture of said water-soluble organic solvent, said wetting agent, and said 2-ethyl-1,3-hexanediol is in an amount of 1 to 30 wt. % of the total weight of said recording ink composition.

Claim 10

Dependent Claim 37 words

The recording ink composition as claimed in claim 1 , wherein said colorant comprises a pigment which is contained in an amount of 0.5 to 25 wt. % of the total weight of said recording ink composition.

Claim 11

Dependent Claim 22 words

The recording ink composition as claimed in claim 9 , wherein said pigment has a particle diameter of 1 μm or less.

Claim 12

Dependent Claim 30 words

The recording ink composition as claimed in claim 9 , wherein said pigment is in the form of a dispersion prepared by dispersing said pigment in water using a dispersant.

Claim 13

Dependent Claim 27 words

The recording ink composition as claimed in claim 11 , wherein said dispersant is a polymer dispersant having a weight average molecular weight of 5,000 to 100,000.

Claim 14

Dependent Claim 19 words

The recording ink composition as claimed in claim 1 , wherein said water-soluble organic solvent comprises a pyrrolidone derivative.

Claim 15

Dependent Claim 15 words

The recording ink composition as claimed in claim 1 , further comprising a resin emulsion.

Claim 16

Independent Claim 257 words

A method of recording images on an image receiving medium, comprising the step of ejecting a recording ink composition in the form of droplets from a recording head onto said image receiving medium, thereby forming images thereon, said recording ink composition comprising: a colorant insoluble and dispersible in water, water, a water-soluble organic solvent, a wetting agent, 2-ethyl-1,3-hexanediol, and a surfactant selected from the group consisting of surfactants of formulas (I) to (V): R 1 —O—(CH 2 CH 2 O) m CH 2 COOM − M + (I) wherein R 1 is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, and m is an integer of 3 to 12, wherein R 2 is a branched alkyl group having 5 to 16 carbon atoms, and M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, R—(OCH 2 CH 2 ) n OH (IV) wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, and wherein R′ is a carbon chain having 6 to 14 carbon atoms, and p and q are each an integer of 20 or less.

Claim 17

Independent Claim 257 words

A method of recording images on an image receiving medium, comprising the step of ejecting a recording ink composition in the form of droplets from a recording head onto said image receiving medium, thereby forming images thereon, said recording ink composition comprising: a colorant insoluble and dispersible in water, water, a water-soluble organic solvent, a wetting agent, 2-ethyl-1,3-hexanediol, and a surfactant selected from the group consisting of surfactants of formulas (I) to (V): R 1 —O—(CH 2 CH 2 O) m CH 2 COOM − M + (I) wherein R 1 is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, and m is an integer of 3 to 12, wherein R 2 is a branched alkyl group having 5 to 16 carbon atoms, and M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanol amine cation, wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, R—(OCH 2 CH 2 ) n OH (IV) wherein R is a straight or branched carbon chain having 6 to 14 carbon atoms, and k is an integer of 5 to 20, and wherein R′ is a carbon chain having 6 to 14 carbon atoms, and p and q are each an integer of 20 or less.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2006-09-01	2007-03-03	2007-09-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2010-09-01	2011-03-03	2011-09-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2014-09-01	2015-03-03	2015-09-02	$7700.00	Window Closed / Lapsed

Recording ink composition and ink-jet printing method using the same

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