US5622550A — Yellow ink composition for ink-jet printing and i…

Claim 1

Independent Claim 160 words

A yellow ink composition for ink jet printing comprising an aqueous solution which comprises: a water-soluble dye which comprises (a) a dye compound of formula (I), ##STR65## wherein X and Y are each selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxyl group and a halogen; Z is an alkanolamine group; M + is selected from the group consisting of an alkali metal cation, a quaternary ammonium cation, a quaternary phosphonium cation, and an alkanol amine cation; and j and k are each an integer of 0 to 3, and (b) at least one of a dye compound of formula (II) ##STR66## wherein Z and M + are respectively the same as in formula (I); and l and m are each an integer of 0 to 3, or a dye compound of formula (III) ##STR67## wherein X, Y and M + are respectively the same as in formula (I), a surfactant, and a wetting agent.

Claim 2

Dependent Claim 160 words

A yellow ink composition for ink jet printing comprising an aqueous solution which comprises: a water-soluble dye which comprises (a) a dye compound of formula (I), ##STR65## wherein X and Y are each selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxyl group and a halogen; Z is an alkanolamine group; M + is selected from the group consisting of an alkali metal cation, a quaternary ammonium cation, a quaternary phosphonium cation, and an alkanol amine cation; and j and k are each an integer of 0 to 3, and (b) at least one of a dye compound of formula (II) ##STR66## wherein Z and M + are respectively the same as in formula (I); and l and m are each an integer of 0 to 3, or a dye compound of formula (III) ##STR67## wherein X, Y and M + are respectively the same as in formula (I), a surfactant, and a wetting agent.

Claim 3

Dependent Claim 33 words

The yellow ink composition as claimed in claim 1, wherein said alkali metal cation represented by M + is a cation selected from the group consisting of Na + and Li + .

Claim 4

Dependent Claim 63 words

The yellow ink composition as claimed in claim 1, wherein said quaternary ammonium cation represented by M + is a cation represented by formula (1): ##STR68## wherein R 1 to R 4 each 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 5

Dependent Claim 79 words

The yellow ink composition as claimed in claim 1, wherein said alkanolamine cation represented by M + is a cation represented by formula (2): ##STR69## wherein at least one of R 11 to R 14 is a hydroxyl alkyl 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 73 words

The yellow ink composition as claimed in claim 1, wherein said quaternary phosphonium cation represented by M + is a cation represented by formula (3): ##STR70## wherein R 21 to R 24 each is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxy alkyl group having 1 to 4 carbon atoms, and a halogenated alkyl group having 1 to 4 carbon atoms.

Claim 7

Dependent Claim 34 words

The yellow ink composition as claimed in claim 1, wherein said dye compound of formula (III) is in an amount of 30 wt. % or less of the entire weight of said water-soluble dye.

Claim 8

Dependent Claim 113 words

The yellow ink composition as claimed in claim 1, wherein said surfactant is selected from the group consisting of a polyoxyethylene alkyl ether acetate of formula (IV), RO(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 COO.sup.- M.sup.+ ' (IV) wherein R is a straight-chain or branched alkyl group having 13 to 14 carbon atoms, M + ' is an alkali metal cation, a quaternary ammonium cation, a quaternary phosphonium cation or an alkanolamine cation, and n is an integer of 3 to 12; and a dialkylsulfosuccinate of formula (V), ##STR71## wherein R' is a straight-chain or branched alkyl group having 5 to 7 carbon atoms, and M + ' is the same as defined in formula (IV).

Claim 9

Dependent Claim 33 words

The yellow ink composition as claimed in claim 7, wherein said alkali metal cation represented by M + is a cation selected from the group consisting of Na + and Li + .

Claim 10

Dependent Claim 64 words

The yellow ink composition as claimed in claim 7, wherein said quaternary ammonium cation represented by M + ' is a cation represented by formula (1): ##STR72## wherein R 1 to R 4 each 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 11

Dependent Claim 80 words

The yellow ink composition as claimed in claim 7, wherein said alkanolamine cation represented by M + ' is a cation represented by formula (2): ##STR73## wherein at least one of R 11 to R 14 is a hydroxyl alkyl 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 12

Dependent Claim 74 words

The yellow ink composition as claimed in claim 7, wherein said quaternary phosphonium cation represented by M + ' is a cation represented by formula (3): ##STR74## wherein R 21 to R 24 each is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxy alkyl group having 1 to 4 carbon atoms, and a halogenated alkyl group having 1 to 4 carbon atoms.

Claim 13

Dependent Claim 68 words

The yellow ink composition as claimed in claim 1, wherein said surfactant is selected from the group consisting of a compound of formula (VI), ##STR75## wherein R" is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, and n' is an integer of 5 to 12; and a compound of formula (VII), ##STR76## wherein a and b are each an integer of 0 to 40.

Claim 14

Dependent Claim 20 words

The yellow ink composition as claimed in claim 12, further comprising at least one of urea or an urea derivative.

Claim 15

Dependent Claim 33 words

The yellow ink composition as claimed in claim 1, wherein said wetting agent comprises triethylene glycol in an amount of 1 to 80 wt. % of the entire weight of said wetting agent.

Claim 16

Dependent Claim 16 words

The yellow ink composition as claimed in claim 1, having a pH of 7 to 11.

Claim 17

Dependent Claim 16 words

The yellow ink composition as claimed in claim 6, having a pH of 7 to 11.

Claim 18

Dependent Claim 16 words

The yellow ink composition as claimed in claim 7, having a pH of 7 to 11.

Claim 19

Dependent Claim 16 words

The yellow ink composition as claimed in claim 12, having a pH of 7 to 11.

Claim 20

Dependent Claim 16 words

The yellow ink composition as claimed in claim 13, having a pH of 7 to 11.

Claim 21

Dependent Claim 16 words

The yellow ink composition as claimed in claim 14, having a pH of 7 to 11.

Claim 22

Independent Claim 206 words

A method of recording images on an image receiving medium, comprising the step of ejecting a yellow ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a St ockigt size degree of 3 seconds or more, with said yellow ink composition comprising an aqueous solution which comprises: a water-soluble dye which comprises (a) a dye compound of formula (I), ##STR77## wherein X and Y are each selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxyl group and a halogen; Z is an alkanolamine group; M + is selected from the group consisting of an alkali metal cation, a quaternary ammonium cation, a quaternary phosphonium cation, and an alkanol amine cation; and j and k are each an integer of 0 to 3, and (b) at least one of a dye compound of formula (II) ##STR78## wherein Z and M + are respectively the same as in formula (I); and l and m are each an integer of 0 to 3, or a dye compound of formula (III) ##STR79## wherein X, Y and M + are respectively the same as in formula (I), a surfactant, and a wetting agent.

Claim 23

Independent Claim 206 words

A method of recording images on an image receiving medium, comprising the step of ejecting a yellow ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a St ockigt size degree of 3 seconds or more, with said yellow ink composition comprising an aqueous solution which comprises: a water-soluble dye which comprises (a) a dye compound of formula (I), ##STR77## wherein X and Y are each selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxyl group and a halogen; Z is an alkanolamine group; M + is selected from the group consisting of an alkali metal cation, a quaternary ammonium cation, a quaternary phosphonium cation, and an alkanol amine cation; and j and k are each an integer of 0 to 3, and (b) at least one of a dye compound of formula (II) ##STR78## wherein Z and M + are respectively the same as in formula (I); and l and m are each an integer of 0 to 3, or a dye compound of formula (III) ##STR79## wherein X, Y and M + are respectively the same as in formula (I), a surfactant, and a wetting agent.

Claim 24

Dependent Claim 36 words

The method as claimed in claim 21, wherein said alkali metal cation represented by M + in said yellow ink composition is a cation selected from the group consisting of Na + and Li + .

Claim 25

Dependent Claim 66 words

The method as claimed in claim 21, wherein said quaternary ammonium cation represented by M + in said yellow ink composition is a cation represented by formula (1): ##STR80## wherein R 1 to R 4 each 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 26

Dependent Claim 82 words

The method as claimed in claim 21, wherein said alkanolamine cation represented by M + in said yellow ink composition is a cation represented by formula (2): ##STR81## wherein at least one of R 11 to R 14 is a hydroxyl alkyl 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 27

Dependent Claim 76 words

The method as claimed in claim 21, wherein said quaternary phosphonium cation represented by M + in said yellow ink composition is a cation represented by formula (3): ##STR82## wherein R 21 to R 24 each is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxy alkyl group having 1 to 4 carbon atoms, and a halogenated alkyl group having 1 to 4 carbon atoms.

Claim 28

Dependent Claim 37 words

The method as claimed in claim 21, wherein said dye compound of formula (III) in said yellow ink composition is in an amount of 30 wt. % or less of the entire weight of said water-soluble dye.

Claim 29

Dependent Claim 116 words

The method as claimed in claim 21, wherein said surfactant in said yellow ink composition is selected from the group consisting of a polyoxyethylene alkyl ether acetate of formula (IV), RO(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 COO.sup.- M.sup.+ ' (IV) wherein R is a straight-chain or branched alkyl group having 13 to 14 carbon atoms, M + ' is an alkali metal cation, a quaternary ammonium cation, a quaternary phosphonium cation or an alkanolamine cation, and n is an integer of 3 to 12; and a dialkylsulfosuccinate of formula (V), ##STR83## wherein R' is a straight-chain or branched alkyl group having 5 to 7 carbon atoms, and M + ' is the same as defined in formula (IV).

Claim 30

Dependent Claim 71 words

The method as claimed in claim 21, wherein said surfactant in said yellow ink composition is selected from the group consisting of a compound of formula (VI), ##STR84## wherein R" is a straight-chain or branched alkyl group having 6 to 14 carbon atoms, and n' is an integer of 5 to 12; and a compound of formula (VII), ##STR85## wherein a and b are each an integer of 0 to 40.

Claim 31

Dependent Claim 23 words

The method as claimed in claim 28, wherein said yellow ink composition further comprises at least one of urea or a urea derivative.

Claim 32

Dependent Claim 36 words

The method as claimed in claim 21, wherein said wetting agent in said yellow ink composition comprises triethylene glycol in an amount of 1 to 80 wt. % of the entire weight of said wetting agent.

Claim 33

Dependent Claim 19 words

The method as claimed in claim 21, wherein said yellow ink composition has a pH of 7 to 11.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2000-04-21	2000-10-21	2001-04-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2004-04-21	2004-10-21	2005-04-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2008-04-21	2008-10-21	2009-04-22	$7700.00	Window Closed / Lapsed

Yellow ink composition for ink-jet printing and image recording method using the same

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