JPS6219483A - Chemicals for ink jet recording paper - Google Patents

Abstract

PURPOSE:To obtain the chemicals excellent in water resistance and coloration without discoloration to any ink and excellent in light resistance, by a method wherein the chemicals are composed of specific quaternary ammonium salt. CONSTITUTION:The said chemicals are composed of quaternary ammonium salt given in general formula (1). In the formula (1), as the alkyl group the carbon numbers of R1 and R2 of which are not less than 14, there are the saturated or unsaturated alkyl group having the straight chain or the branch the carbon number of which is generally 14-24 or alkenyl group such as, tetradecyl, pentadecyl, hexadecyl, octadecyl, nonadecyl, eicosyl, oleyl groups, etc. Preferable ones among those are the alkyl group the carbon numbers of which are 16-20 and the most preferable ones are pentadecyl and octadecyl groups. The alkyl group the carbon numbers of R1 and R2 of which are under 14, are inferion in water resistance. As the alkyl group the carbon numbers of R3 and R4 of which are 1-4, methyl, ethyl, n- or iso-propyl and butyl groups can be mentioned and preferable ones among R3 and R4 are methyl, ethyl, and benzyl groups.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a chemical for inkjet recording paper.

[Conventional technology]

Cation activators such as cetyltrimethylammonium bromide are examples of chemicals used in inkjet recording paper.

[Problem that the invention seeks to solve]

However, the above-mentioned cationic activator has poor water resistance to acid dye ink such as Acid Blue 1, and the ink flows out when it comes into contact with water.

[Means for solving problems]

The present inventor has arrived at the present invention as a result of extensive research into chemicals for inkjet recording paper that have excellent water resistance even for acid dye inks such as Acidop/I/-1, which have poor water resistance.

(In the formula, turtle and bird are alkyl groups with 14 or more carbon atoms, birds and gourds are alkyl groups with 1 to 4 carbon atoms, hydroxyalkyl groups with 2 to 4 carbon atoms, or benzyl groups; X is an anionic counter ion. This is a patented agent for printing paper, which is characterized by consisting of a quaternary ammonium salt represented by:

In the general formula (1), the bird and the avian alkyl group having 14 or more carbon atoms are usually straight chain or branched saturated or unsaturated alkyl or alkenyl groups having 14 to 24 carbon atoms, such as tetradecyl.

Examples include pentadecyl p, hexadecyl, octadecyl, nonadecyl, eicosyl, and oleyl groups. Among these, preferred are alkyl groups having 16 to 20 carbon atoms, and particularly preferred are pentadecyl and octadecyl groups.

Reptile and bird alkyl groups having less than 14 carbon atoms have poor water resistance.

Examples of the alkyl group having 1 to 4 carbon atoms include methyl, ethyl/L/, n- or iso-propyl, and buty-ρ groups. As a hydroxyalkyl group having 2 to 4 carbon atoms, -OH, C! H, OH, -CH, CH
.

CH, OH, -OH, OH(CH3)OH, -CH2C
! Examples include H(OH,0H)CH, etc. Preferred among R3 and melon are methyl, ethyl and benzyl groups.

The anionic counter ion of Xo is ROso, an ion represented by - (Tasoshi 几 is an alkyl group having 1 to 3 carbon atoms) (OH30803, C2I (,080,, etc.)
and halogen ions (Ol, Br-, etc.).

Among these, 0H3os is preferable from the viewpoint of light resistance.
o3' and C, H3O80;

Specific examples of the quaternary ammonium salt represented by general formula (1) include the following.

(1) Dihigher alkyldilower alkyl ammonium salt Dihigher alkyldilower alkyl ammonium salt having two linear or branched alkyl groups having 14 to 24 carbon atoms, such as dioctadecyldimethylammonium methosulfate, dihexadecyl Diethylammonium ethosulfate, ditetradecylmethylethylammonium ethosulfate, and hexadecyl octadecyldimethylammonium methosulfate (i) Dihigher alkyl lower alkyl benzyl ammonium salt 2 linear or branched carbon atoms having 14 to 24 carbon atoms Dihigher alkyl lower alkyl having an alkyl group, benzyl ammonium salts such as dioctadecylmethylbenzylammonium methosulfate, tetradecyl octadecylethylbenzylammonium ethosulfate, and didocosylmethylpendylammonium methosulfate with the general formula (1) The method for producing the quaternary ammonium salt shown is, for example, using a dihigher alkyl lower alkyl 8th class amine and a lower alcohol solvent (for example, isopropyl alcohol).
Based on the total weight of the 8th class amine and lower alcohol, 10 to 80 grams of Co/L/) are mixed to lower the viscosity in the system. Add alkylating agent (e.g. dimethyl sulfate) and
0 to 90'' (3) to perform a quaternization reaction to obtain a quaternary ammonium salt.

The base material for inkjet recording paper in which the agent of the present invention is used is typically paper, but cloth, resin film, synthetic paper, etc. can also be used.

Methods for producing inkjet recording paper containing the agent of the present invention include (1) a method of incorporating a quaternary ammonium salt into the base material; for example, a method of immersing the base material in an impregnation solution containing a quaternary ammonium salt (post-treatment method); ), and (2) a method of making paper using an aqueous solution of a quaternary ammonium salt in the papermaking process (inner filling method), and (2) a method of incorporating a quaternary ammonium salt in the coating layer on the base material. An example of this method is to apply a coating solution containing salt onto a substrate and dry it.

The concentration of the quaternary ammonium salt in the impregnating solution or aqueous solution (1) can be varied depending on the viscosity of the solution and the solubility of the quaternary ammonium salt, but is usually 0.05 to 2% by weight, preferably 0.1 to 2%. It is 1.5% by weight. In this case, the liquid ratio is usually 1:5 to 200s, preferably 1:lθ
~100. The drawing ratio is usually 30 to 150 inches, preferably 50 to 100 inches.

The coating liquid for (2) generally contains inorganic pigments (fine silicic acid,
Clay, talc, diatomaceous earth, calcium carbonate □
Mu, calcium sulfate, barium sulfate, titanium oxide.

Sachin white, aluminum silicate, lithopone, etc.)
, water-soluble polymers (starch, gelatin, casein, gum arabic, sodium alginate)
Luce le roll, polyvinyl a
Le Cole.

polyvinylpyrrolidone, sodium polyacrylate, etc.) 1
Synthetic resin latex (synthetic rubber latex, etc.), organic solvent-soluble resin (polyvinyl butyral, etc.)

polyvinyl chloride, etc.), a dispersed fluorescent dye, a PH adjuster, an antifoaming agent, a lubricant, a preservative, a surfactant, and the like.

An example of the formulation of the coating liquid is: quaternary ammonium salt 2 usually 0.08 to 5% by weight, preferably 0.05 to 3%, inorganic pigment 5 to 80%, water-soluble polymer 8 to 15% by weight. , water is the rest.

The coating amount (dry coating amount) is usually 1 to 50 g/m, preferably 2 to 80 g/m''.

The coating liquid can be applied using a known method (roll coater).
method, blade coater method, air knife coater method, etc.)
There is.

The inks used in printing in the present invention generally include water-soluble direct dyes, water-soluble acid dyes, and water-soluble reactive dyes. C0I is a water-soluble direct dye.

Direct black (4, 19, ss, 154, etc.), C0■, Directop/I/- (86, etc.), etc. Water-soluble acid dyes include C01, Acid Red (35, etc.), O, I, Acid. Yellow (28, etc.), C61° Acid Blue (1, 9, 40, etc.), C0
1. Acid black (1, 31, etc.) 2. As a water-soluble reactive dye, 0.1. Reactive Yellow (87, 5
7 etc.), C, I.

Examples include Reactive Red (21, 170, etc.), C01, Reactive Cup/l/- (27, 77, etc.).

An example of an ink formulation is 1 to 8 parts dye, tiglycol, or 5 parts to diethylene glycol, 0 part to water.

Inkjet printers use normal methods such as
The drop-on-demand method, continuous method, etc. described in "Information Industrial Paper" (July 10, 1980, published by Shigyo Times) can be used.

〔Example〕

The present invention will be further explained below with reference to Examples, but the present invention is not limited thereto. Parts in Examples indicate parts by weight. Moreover, the test methods in the examples are shown below.

(Test method) (1) Recording paper coated with water-resistant ink was immersed in running water (approximately 20°C) for 30 minutes, taken out and after drying, the optical density of the sample paper was measured using a phototube colorimeter Spectronic 20. . It was determined how many times this value decreased compared to the original optical density.

(2) The optical density of the recording paper coated with the color-forming column ink was measured using a phototube colorimeter Spectronic 20 (manufactured by Takasu Seisakusho).

(3) Measure the diameter of the dots printed on the recording paper using a microscope (OLYM).
P08 BH-2) and expressed as how many times larger the ink droplet was.

(4) The a and b values of the recording paper glue coated with the color changing and fading ink were measured using a colorimeter ND-504DE (manufactured by Nippon Denshoku Kogyo ■), and the color difference (ΔE) from the blank was determined. .

(5) The recording paper coated with the light-fast ink was irradiated with a fade-o-meter at 68° C. for 20 hours, and the color difference (ΔE) from the unirradiated area was determined using a colorimeter.

Examples 1 to 5, Comparative Examples 1 and 2 1 shows a drug of the invention.

Example 1 Nidioctadecydimethylammonium methosulfate Example 2 Nidioctadecydiethylammonium ethosulfate Example 3 Nidioctadecymethylethyammonium ethosulfate Example 4 Diogtadecylmethylbenziethosulfate Example 5 Nidioctadecyμ methylbenzip Methosulfate Comparative Example 1 Nilauryltrimethylammonium chloride Using the drugs of the present invention (Examples 1 to 5) and comparative drugs (Comparative Examples 1 and 2), an aqueous solution of this 2-ti (solid content) was prepared,
General paper (basis weight 7097 m') with a size degree of 0 seconds was immersed in this and dried to obtain an inkjet recording paper with about 1% by weight of the chemical adhered to the base material.

Color ink jet recording was performed on this ink sheet recording paper using four color inks, and the recording characteristics were evaluated. The results are shown in Tables 1 to 4.

(Note 1) Ink Blue Ink C, 1, Acid Blue 1 3 (Parts by Weight) Diethylene Glyco-A/80 Water 68 Red Ink C01, Acid Red 352 Diethylene Glycol 80 Water 68 Yellow Ink 0, I, Reactive Yellow 872 Diethylene Glycol 30 Water 68 Black Ink C01, Direct Black 19 2 Diethylene Glyco/L' 80 Water
68 (1) Blue Ink Table-1 (2) Yellow Ink Table-2 As shown in Table-1 and Table-2, the drug of the present invention is C
! , I, Acidob/I/-1 and C01, Reactive Yellow 85 inks, conventional product (Comparative Example 1)
It has extremely good water resistance compared to other chemicals. It also has excellent discoloration and light resistance.

(3) Red ink table-3 (4) Black ink table-4 As shown in Table-3 and Table-4, the drug of the present invention is C
, I, Acid Red 35 and C11, Direct Black 19, it has excellent water resistance, discoloration and fading, and light resistance.

〔Effect of the invention〕

Claims (1)

[Claims] 1. General formula ▲ Numerical formula, chemical formula, table, etc. ▼ (1) (In the formula, R_1 and R_2 are alkyl groups having 14 or more carbon atoms; R_3 and R_4 are alkyl groups having 1 to 4 carbon atoms. A chemical agent for inkjet recording paper, characterized in that it consists of a quaternary ammonium salt represented by a group, a hydroxyalkyl group having 2 to 4 carbon atoms, or a benzyl group; X is an anionic counterion. 2. The anionic counterion is ROSO_3^-(TazushiR
is an alkyl group having 1 to 3 carbon atoms. ) The drug according to claim 1, which is an ion represented by: