JPS6215273A - Recording liquid - Google Patents

Abstract

PURPOSE:To obtain a recording liquid with little blur and outstanding dryability in the (type)writings, suitable for ink jet printer and as ink for writing utensils, by incorporating original recording liquid with an alkylene oxide adduct of pentose or its sugaralcohol, etc. CONSTITUTION:The objective recording liquid can be obtained by incorporating (A) original recording liquid consisting mainly of (i) a recording agent and (ii) a liquid medium dissolvable or dispersible for the component (i) with (B) an alkylene oxide adduct of pentose or its sugaralcohol (e.g., arabinose, xylose) (the mole number added being pref. 2-25) and/or alkyl-, alkenyl-, or arylether- modified product from said adduct (intramolecularly free from ester structure).

Description

[Detailed description of the invention] [Industrial application field] The present invention applies to paper, film, glass, and metal.

The present invention relates to a recording liquid suitable for recording materials such as cotton cloth, particularly paper, writing instruments that use ink to record on cloth, and inkjet printers.

[Conventional technology]

2. Description of the Related Art Recording liquids having a wide variety of compositions have been proposed for use in writing instruments, inkjet printers, and the like.

The performance required for recording liquid used in writing A, inkjet printers, etc.

(1) The writing or printed matter should not bleed, and (2) the writing or printed matter should not dry quickly.

(4) Good storage safety; (5) High safety; etc.

Of these performance requirements, the one that is particularly technically difficult is (
1), (2) and (3). -Yes.

For example, in order to improve the drying properties of writing and printed matter, a method that is commonly considered is to add a surfactant to the ink.

In this case, if you write or print on paper or cloth commonly used in offices such as notebooks, report paper, copy paper, and stationery.

Ink spreads along the fibers of paper or cloth, causing smearing.

Additionally, a method of adding water-soluble polymers to ink is also often used for the purpose of improving the drying properties of written and printed materials. In this case, although it is possible to suppress the bleeding, the tip of the pen and the tip of the printer head tend to dry out, which seriously hinders writing or printing.

Therefore, conventionally, when recording with a general inkjet printer, for example, paper specially designed for the inkjet printer, that is, special paper that has good ink absorption and does not cause irregular bleeding, is designed so that it does not dry easily in the printer head. By using it in combination with the above-mentioned ink (
A system is constructed that satisfies 1) to (3) at the same time.

Such printer systems cannot print satisfactorily on papers commonly used in offices such as notebooks, report paper, copy paper, and stationery, especially on fine lines, fine characters, and JIS 2 paper. Complex kanji, which were specified as standards, were often unclear and difficult to read.

In addition, paper like the one mentioned above is generally sized during the paper manufacturing process to prevent it from bleeding against writing instruments that use water-based ink, such as fountain pens, so when you write, your hands will be covered with ink. When printing with an inkjet printer, it is difficult for the ink to penetrate inside the paper, so the printed area does not dry well and takes a long time to dry, so the printed matter can rub against the printer cover and get dirty.Do not print by hand. There were problems such as ink getting on your hands when you touched it.

Therefore, various improvements have been attempted to the doubling yarn, but at present no ink has been found to solve the problem.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an ink composition which can be used in various writing implements, inkjet printers, etc., and which solves the above-mentioned problems of conventional inks.

In other words, the purpose of the present invention is to obtain a recording liquid that improves the bleeding and drying properties of written and printed materials, does not cause clogging in the pen tip or printer head, and has excellent storage stability and safety. be.

[Means for solving problems]

The above object is achieved by the present invention as follows.

Specifically, the present invention provides a recording liquid mainly composed of a recording agent and a liquid medium for dissolving or dispersing the recording agent, in which an alkylene oxide adduct of pentose or a sugar alcohol thereof and/or an alkyl of the adduct, This is a recording liquid characterized by containing an alkenyl or aryl ether compound.

Effects> The recording liquid of the present invention contains at least water, a recording agent, and an alkylene oxide adduct of pentose or a sugar alcohol thereof, and/or an alkyl, alkenyl, or aryl etherified product of the adduct.

In the present invention, the alkylene oxide adduct of pentose or its sugar alcohol is one in which alkylene oxide is added to the hydroxyl group of pentose or its sugar alcohol.

Further, the alkyl, alkenyl or aryl etherified product of the adduct refers to a compound obtained by converting the hydroxyl group contained in the adduct to alkyl, alkenyl or aryl ether.

A specific example of the pentose or its sugar alcohol according to the present invention is arabitol.

xylulose, xylose, lyxose, ribulose,
These include repose, arabitol, and ribitol.

Furthermore, examples of the alkylene oxide added to pentose or its sugar alcohol include ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran.

What is the number of moles of alkylene oxide added to one molecule of pentose or its sugar alcohol?

The number is preferably 1 to 50, preferably 2 to 25.

Further, the alkylene oxides to be added may be the same or different, and may be in the form of a block copolymer or a random copolymer.

Examples of the alkyl group, alkenyl group, or aryl group for etherifying the alkylene oxide adduct of pentose or its sugar alcohol include 01 to C20 alkyl groups, alkenyl groups, phenyl x, it-substituted phenyl groups, and naphthyl groups.

Examples include aryl groups such as substituted naphthyl groups.

The position of etherification may be the hydroxyl group of the pentose or its sugar alcohol, or the hydroxyl group at the end of the alkylene oxide chain.

The alkylene oxide adduct of pentose or its sugar alcohol and its etherified product according to the present invention are characterized in that they do not contain an ester structure in the molecule, and in this respect, they have a surface activity that is higher than that of conventionally known sorbitan esters and sucrose esters. It is completely different from the drug.

The alkylene oxide adduct of pentose or its sugar alcohol and its etherified product according to the present invention include the pentose or its sugar alcohol, alkylene oxide, and alkyl group.

Physical properties such as viscosity and solubility in water vary depending on various conditions such as the type of alkenyl group or 7-aryl group, the number of moles of alkylene oxide added, and the degree of etherification.

In general, ethylene oxide adducts are less likely to cause bleeding, and adducts such as propylene oxide and butylene oxide, as well as alkyl, alkenyl, and aryl ether compounds, have excellent drying properties, but tend to be somewhat difficult to dissolve in water. It is preferable to use one type or a mixture of two or more types as required.

The amount of these compounds added to the ink varies depending on the characteristics of the compound, ranging from small amounts added like an additive to large amounts like a solvent, and there is no particular restriction on the amount added. .

As the recording agent used in the present invention, both dyes and pigments can be used.
Water-soluble acidic dyes, direct dyes, and basic dyes listed in R Index).

Almost all reactive dyes can be used, and even pigments can be used in a dispersed state in an aqueous liquid medium.

Further, even if it is not listed in the color index, it can be used as long as it is a water-soluble dye, and even if it is not listed in the color index, it can be used as long as it can be dispersed in an aqueous liquid solvent.

The amount of these recording agents used is not particularly limited, but is generally 0.1 to 15% by weight based on the total weight of the recording liquid.
A range of is suitable.

The recording liquid of the present invention is mainly composed of water, a recording agent, a fullylene oxide adduct of pentose or its sugar alcohol, and/or an alkyl, alkenyl, or aryl ether compound of the adduct. and water-soluble organic solvents.

Surfactants, PH adjusters, rust preventives, antiseptic and fungicides, antioxidants, evaporation accelerators, chelating agents.

Various additives such as water-soluble polymers may be added.

Specifically, water-soluble organic solvents include ethylene glycol, diethylene glycol, triethylene glycol,
Polyethylene glycol, propylene glycol, polypropylene glycol, ethylene oxide-propylene oxide copolymer, trimethylene glycol, 1.
Polyhydric alcohols such as 3-butanediol, 1,4-butanediol, hexylene glycol, and glycerin, and their alkyl ethers.

Derivatives such as aryl ethers N-methyl-2-pyrrolidone, 1,3-dimethylimidazolidinone, sulfolane,
Examples include r-butyrolactone, tetrahydrofurfuryl alcohol, diacetone alcohol, triethanolamine, hydroxyethylmorpholine, and the like. Furthermore, various anionic, cationic, amphoteric, and nonionic surfactants can be used as surfactants, but from the standpoint of storage stability of the ink, hydrolysis of carboxylic ester structures, amide structures, etc. It is desirable to use surfactants that do not contain structures that are susceptible to oxidation.

The present invention will be explained in more detail below using Examples and Comparative Examples. In the following, all "parts" indicate "parts by weight." Further, EO represents ethylene oxide, and PO represents propylene oxide.

Example 1 After sufficiently stirring the above composition, a recording liquid having a pore size of the present invention was prepared.

Example 2 Obtained.

Example 3 Obtained.

Example 4 MA-1003 part Niryo Kasei Kogyo Co., Ltd. (Japanese title of acid carbon black) stearyl ether of EO adduct of arabitol 0.
5 parts (average molecular weight 910) ethylene glycol
20 parts diethylene glycol
5 parts triethanolamine
5th part demo N
Part 015 (Hanadamaishi flii(a)
1's β-naphthalene sulfo instigation +11・zu11 ・No Dramas 7 Corps Le n)--kll^ ノ, 蚤臇 n~51 and refused) L water 66
MA-100, Demol N with the above composition.

Mix triethanolamine using a triple roll.

After dispersion, the remaining components were gradually added to obtain the above composition, which was then filtered through a Fluorobor filter with a pore size of 10 IL to obtain a recording liquid of the present invention.

Comparative Example 1 A recording liquid was obtained in the same manner as in Example 1 except that the EO adduct of arabinose in Example 1 was replaced with polyethylene glycol 400 (average molecular weight: 1400) and the primary composition was changed.

Comparative Example 2 An ink was obtained in the same manner as in Example 4 with the following composition in which the stearyl ether of the EO adduct of 7-rabitol in Example 4 was replaced with the stearyl ester of the EO adduct of 7-rabitol.

Application Example 1 Table 1 shows the physical properties of the inks of Examples 1 to 4 and Comparative Examples 1.2, evaluation results of printing when printed with an inkjet printer, and evaluation results of storage stability.

In Table 1, printer "Bo" is an inkjet printer that uses a heating element as an ink ejection energy source (orifice size 50 x 40p, number of nozzles 24).
P indicates an inkjet printer (orifice size: 65 mm, number of nozzles: 4) that uses a piezoelectric element as an ink ejection energy source, and was used to evaluate the rate of bleeding and the dryness of printing. Indicates the type of printer.

Regarding the incidence of bleeding, after printing 300 dots on commercially available continuous slip paper using a printer, making sure not to run consecutively,
After one hour, the dots were left to stand, and the number of dots that had smudged was counted using a microscope and evaluated based on the percentage. (22±5℃, 60±10%
(Printed at RH) 0: 15% or less Δ: 16-40% ×: 41% or more Regarding the dryness of printing, after printing alphanumeric characters with a printer on commercially available continuous slip paper, 1O920, 30, 40, 5
After 0.60 seconds, the printed area was rubbed with a filter paper (No. 2, trade name, manufactured by Toyo Roshi Co., Ltd.), and judgment was made based on the number of seconds until the printing was no longer stained. (22±5℃, 60±1O%
(Printed and measured at RH) O: Within 20 seconds Δ: 20 to 40 seconds After saving, the results were printed on 100 sheets of continuous slip paper using a printer and evaluated.

O: No abnormality ×: Abnormal occurrence (clogging, non-discharge.

Table 1 Ink physical properties and evaluation results Application example 2 Next, each ink of Examples 1 to 4 and Comparative Example 1.2 was filled into a commercially available water-based marker from which the ink had been removed. Table 2 shows the evaluation results when written on official postcards.

Table 2 Evaluation results when applied to writing implements In Table 2, the degree of bleeding was determined visually by writing letters about 8 mm vertically and horizontally.

(Determined at 22±5° C., 60±1O% RH) The dryness of handwriting was also evaluated by writing the same letters, placing a filter paper on the letter, rubbing it, and measuring the number of seconds until the filter paper was no longer stained.

〔effect〕

The recording liquid of the present invention is particularly suitable for use as an ink for inkjet printers and writing implements because it has little bleeding in printed matter and written matter and has excellent drying properties.

Further, the fullylene oxide adduct of pentose or its sugar alcohol and/or the alkyl, alkenyl or aryl etherified product of the adduct used in the present invention does not contain an ester structure in its molecule, and therefore is not known from the past. Like the sorbitan ester and sucrose ester surfactants, it is stable without being hydrolyzed in an aqueous liquid medium, and the ink itself has good storage stability.

Furthermore, using the inks of Examples 1 to 4 in an inkjet printer, printing was attempted on OHP film for inkjet printers and 100% cotton broadcloth, but in both cases, there was little bleeding and good printing was possible. .

Proceedings (spontaneous) December 6, 1985 Michibu Uga, Commissioner of the Patent Office, 1985 Patent Application No. 155715 2. Record of name of invention 3. Relationship with the case of the person making the amendment Patent Applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
) Canon Co., Ltd. Representative Ryuzo Kaku
Part 4, Agent's residence 3-30 Shimomaruko, Ota-ku, Tokyo 146. -2 Inside Canon Co., Ltd. (Telephone 758-2111) 5. Specification subject to amendment 6. Contents of amendment (1) In line 14 of page 1 of the specification, the words “cloth cotton” are corrected to “fabric”. do.

(2) In the 1st and 2nd lines of page 3, the words ``cloth cotton'' are corrected to ``cloth.''

Claims (1)

[Claims] A recording liquid mainly composed of a recording agent and a liquid medium for dissolving or dispersing the same, containing an alkylene oxide adduct of pentose or its sugar alcohol and/or an alkyl, alkenyl or aryl etherified product of the adduct. A recording liquid characterized by: