JPH0621249B2 - Recording liquid - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a recording liquid for ink jet recording and writing instruments.

2. Description of the Related Art When plain paper such as electrophotographic paper, bond paper, and stock foam paper is used as the recording paper in the ink jet recording method, even if the recorded print is rubbed with a finger after the recording, the image does not shift. There are problems such as shortening the time until (fast drying), that the print has no bleeding and has a contour (print quality).

Conventionally, a water-soluble dye, a polyhydric alcohol or a derivative of a polyhydric alcohol, and water have a surface tension of 20 to 50 dyne · cm ⁻¹ at a micelle concentration in water, and a surfactant of 0.5 to
25 wt% or dialkyl sulfosuccinate 0.1
It is known that the above-mentioned recording liquid improved in quick-drying property and printing quality by adding 3 to 3% by weight, and examples of the polyhydric alcohol derivatives include alkyl ether derivatives of polyhydric alcohols and acetate derivatives of polyhydric alcohols. (JP-A-55-29546, JP-A-55-6)
5269, JP-A-56-95961, etc.).

However, there is a problem that the recording liquid easily foams when the content of the surfactant is large.

Further, further improvements in quick-drying property and printing quality have been desired.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to provide a recording liquid capable of obtaining printing that is excellent in quick drying property and printing quality even when recording is performed on plain paper.

Means for Solving the Problems The present invention relates to a water-soluble dye, an aqueous medium and HO- (RO).
_n -CH ₂ -CH = CH ₂ (wherein, R is _{C 2} or an alkyl group _{C 3,} n is an integer of 1 to 3) SUMMARY recording liquid containing a lower alkylene glycidyl monoallyl ether represented by And

Examples of the water-soluble dye of the present invention include azo, anthraquinone, quinophthalone, indigo, and phthalocyanine direct dyes and acid dyes.
ct Black-17, -19, -22, -32, -51,-
80, -91, -151 and -154, CIDirect Blu
e-86 and -199, CIDirect Red-80, CI Dir
ect Yellow-86 and -142, CIAcidBlack-2,
-24, -26, -48, -52, -63, -172,
-194 and -208, CIAcid Blue-9, -185
And -254, CIAcid Red-8, -35, -37 and -257, CIAcid Yellow-23 and -49 and CIF.
ood Black-2 is mentioned.

The content of the water-soluble dye is in the range of 0.5 to 12%, preferably 2 to 8%, based on the total weight of the recording liquid.

Examples of the lower alkylene glycol monoallyl ether of the present invention include ethylene glycol monoallyl ether, diethylene glycol monoallyl ether, triethylene glycol monoallyl ether, propylene glycol monoallyl ether, and the like. The range is 10 to 50% by weight based on the weight.

In addition to water, examples of the aqueous medium of the present invention include ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol ( ^# 200), polyethylene glycol ( ^# 400), glycerin and N-methyl-.
Pyrrolidone, N-ethyl-pyrrolidone and the like are preferably contained, and the content of the aqueous medium is in the range of 38 to 89.5% by weight based on the total weight of the recording liquid.

Furthermore, the recording liquid of the present invention are di (C ₄ ~ ₈ alkyl) sulfosuccinates, by adding piperazine or additives that induction equal, be further improved quick drying and printing quality after printing it can.

The amount of the dialkyl sulfosuccinate used is in the range of less than 0.1% by weight based on the total weight of the recording liquid.

Further, as piperazine or a derivative thereof, the following general formula [I] (Wherein, X represents a hydrogen atom or a methyl group, and R represents a hydrogen atom, a hydroxyethyl group or a hydroxypropyl group), and examples thereof include piperazine and 2-
Examples thereof include compounds such as methyl-piperazine, N-β-hydroxyethyl-piperazine, 2-methyl-N-β-hydroxyethyl-piperazine, and N-β-hydroxypropylpiperazine. The range is 0 to 10% by weight, preferably 2 to 5% by weight, based on the total weight.

The recording liquid of the present invention is used for ink jet recording, writing instruments, etc., and has excellent quick-drying property after recording and excellent print quality, so that even when recorded on plain paper, the printed portion can be rubbed with a finger. It is possible to obtain an image in which the image is not displaced and the contour is sharp without bleeding.

When the recording liquid of the present invention is used for ink jet recording, in addition to the above effects, recording characteristics (signal responsiveness, droplet formation stability, ejection stability, long-term continuous recording property), storage stability The light resistance, weather resistance and water resistance of the recorded image are all good.

EXAMPLES The present invention and the following examples will be described in more detail.

Example 1 The above components were sufficiently mixed and dissolved in a container, pressurized with a Teflon filter having a pore size of 1 μm, and then deaerated using a vacuum pump to prepare a recording liquid.

Using the obtained recording liquid, ink jet recording is performed with an ink jet printer (PJ-1080, manufactured by Canon Inc.), and quick-drying and print quality are evaluated according to the following methods (a) and (b). did.

(B) Quick-drying: Printed on electrophotographic paper (manufactured by Fuji Zerox Co., Ltd.), bond paper and stock foam paper (manufactured by Lion Office Equipment Co., Ltd.), and after 30 seconds, rub the printed part with a finger to see if the image is misaligned Was judged.

All of them showed no deviation and showed excellent fixability.

(B) Print quality: Each dot printed on the above-mentioned recording paper was observed with a microscope, and the presence or absence of feathering (whisker-like bleeding) around the dot and the sharpness of the ring were visually evaluated.

None of them had feather rings, and the ring was sharp.

In addition, ink jet recording was evaluated according to the following methods (C) to (C).

(C) Long-term storability of recording liquid: Even after the recording liquid was sealed in a glass container and stored at -30 ° C and 60 ° C for 6 months, no precipitation of insoluble matter was observed, and the physical properties and color tone of the liquid also changed. It was a long time ago.

(D) Discharge stability: Continuous discharge was performed for 24 hours in an atmosphere at room temperature of 5 ° C. and 40 ° C., respectively, and stable high-quality recording could be performed under all conditions.

(E) Discharge response: Intermittent discharge every 2 seconds and discharge after being left for 2 months were examined. In both cases, stable and uniform recording was performed without clogging at the tip of the orifice.

(F) Quality of recorded image: The recorded image was high in density and clear. The rate of decrease in concentration after exposure to room light for 3 months is 1% or less, and when immersed in water for 1 minute,
Image bleeding was very slight.

Comparative Example 1 A recording liquid was prepared by using ethylene glycol monomethyl ether instead of ethylene glycol monoallyl ether in Example 1, and a quick-drying property and print quality were obtained according to the methods of (a) and (b) in Example 1. As a result of the examination, it took 3 minutes until the image was not misaligned, and the dots were significantly blurred in the lateral direction, and the image was blurred.

Example 2 A recording liquid having the above composition was prepared in the same manner as in Example 1, and (a)
As a result of the examination of (f), good results were obtained.

Comparative Example 2 A recording liquid was prepared by using an ethylene glycol monomer isopropyl ether in place of the ethylene glycol monoallyl ether in Example 2, and the recording liquids of Example 1 (a) and (b) were prepared.
As a result of evaluating the quick-drying property and the print quality in accordance with the method of No. 2, it was found that there was no bleeding around the dots, but it took 2 minutes until the image shift did not occur.

Examples 3 to 14 According to the method of Example 1, a recording liquid having the composition shown in Table 1 below was prepared, and the evaluation was performed according to the methods of (a) to (f). All were good.

Example 15 As a water-soluble dye, CIDirect Black-51 or-
91, CIDirect Blue-86, CIDirect Yellow-1
42, CIAcid Black -26 or -63, CIAcid
A recording liquid was prepared according to the method described in Example 1 except that Blue-9 or CIACID Red-8 or -37 was used alone, and the same examinations (a) to (f) as in Example 1 were conducted. I went. All obtained good results.

Example 16 As a water-soluble dye, CIDirect Black-80 or-
151, CIDirect Red-80, CIAcid Black-4
8, -52, -172, -194 or -208, C.I.
I. Acid Blue-254, CIAcid Red-257 or C.
A recording liquid was prepared according to the method described in Example 3 except that I. Acid Yellow-49 was used alone, and the same examinations (a) to (f) as in Example 1 were conducted. All obtained good results.

Claims (4)

[Claims] 1. A recording liquid containing a water-soluble dye, an aqueous medium, and a lower alkylene glycol monoallyl ether represented by the following general formula. _{HO- (R-O) n -CH} 2 -CH = CH 2 ( wherein, R is an alkyl group of _{C 2} or _{C 3,} n is an integer of 1 to 3) 2. The recording liquid according to claim 1, wherein the content of the lower alkylene glycol monoallyl ether is in the range of 10 to 50% by weight based on the total weight of the recording liquid. Wherein the recording liquid di (C ₄ ~ ₈ alkyl) recording liquid in the range first claim of claims containing Surukohaku salt. 4. A recording liquid having the following general formula [1]: The recording liquid according to claim 1, containing a compound represented by the formula: wherein X represents a hydrogen atom or a methyl group, and R represents a hydrogen atom, a hydroxyethyl group or a hydroxypropyl group.