JPS58219275A - Dispersion base composition - Google Patents

Abstract

PURPOSE:To prepare the titled composition having excellent dispersibility and storage stability, and especially excellent coating film properties, by mixing an organic pigment with a dispersible amphoteric vinyl resin obtained by introducing a basic compound having high base strength into an acidic vinyl resin containing electron accepting groups. CONSTITUTION:The objective composition can be prepared by mixing preferably (A) 10-90wt% of a dispersible amphoteric vinyl resin (preferably havinga molecular weight of 500-100,000 and a glass transition temperature of -30-+80 deg.C) obtained by introducing (i) 0.1-50wt% of a basic compound having a pka of 4-11 (e.g. dimethylaminoethyl methacrylate) into (ii) 99.9-50wt% of an acidic vinyl resin containing electron accepting groups with (B) 90-10wt% of an organic pigment. The introduction of the component (i) into the component (ii) is preferably carried out by copolymerizing the component (i) with the component (ii), or by reacting the component (i) with the component (ii) each having an active group reactive with each other (preferably active hydrogen and a functional group reactive with active hydrogen).

Description

[Detailed Description of the Invention] The present invention is based on @ "A" 1 dispersion base composition, and more specifically, a basic compound having a specific basicity is introduced into an acidic vinyl resin having an electron-accepting group. There is a part C related to a dispersed Heiss silk parabolite which is made of both F4 vinyl resin for dispersion and a 6-layer pigment and has particularly excellent dispersibility and coating performance.

Conventionally, in the field of coating 3'+1, various pigments are dispersed using a part of the main resin used in the final coating, stored as a dispersion base composition, and as necessary, this is mixed with a suitable resin and solvent.
A common method is to dilute and blend C to make the final paint.

Since such Ij method-C requires various dispersion resins depending on each fφ coated layer 1, it is necessary to produce a wide variety of dispersion base compositions little by little. There was a problem that it could not be measured. face to be painted)'l is 1
- Since there are many different types of plastics, and each type has different surface characteristics, it is difficult to disperse various types of marine oils well with a single dispersing resin.

First, the present inventors focused on the fact that each of the 11 types of surfaces had acidic, basic, or amphoteric characteristics.

We have discovered that it is possible to develop a single dispersion resin that can disperse various pigments well by introducing acid/base amphoteric properties into the resin. Furthermore, since this resin is amphoteric, it has good compatibility with various paint resins, and it has been found that it can satisfy the various functions of dispersion resins that have traditionally been required in the coating industry. We have also filed a patent application for a dispersion composition consisting of such an amphoteric dispersion resin, face, and l'il. (Patent Application No. 56-120866, Patent Application No. 5/-0367 2).

C for the inorganic face 11 of the paint face O'31 is the above-mentioned -
Although a 1-minute effect was observed, subsequent research has shown that the effect varies with respect to organic pigments. The surface characteristics of the organic pigment using Zunawachi coating are also acidic and basic↑1
Although it is true that they are classified into both sexes, □
In general, the strength of acidity and basicity is weak, so the amount of acidity and basicity in the amphoteric resin for dispersion is specified. Lever C The inventors of the present invention have worked hard to find a solution to this problem.
As a result of the first investigation, for the pigment A1 for coating 11, C is 1 with a high base strength defined by pka'c', which indicates base strength.
We have developed the present invention by discovering that it is possible to develop amphoteric vinyl resins with good dispersion performance and painting workability by introducing a functional compound into the resin.

According to the present invention, a basic compound with a pka of 4 to 11 is introduced into an acidic vinyl resin having an electron-accepting group. The present invention provides a dispersion base composition that has excellent properties, storage stability, and particularly good coating performance.

The basic resin of the 14-vinyl resin for dispersion used in the present invention is an acidic resin, into which a specific basic compound with a strong base is introduced (it becomes a 11-vinyl resin). Acid 111 Resin (A 7TX 1 size field C) Acid/[q Vinyl resin C1] When introducing a basic compound into this, the base of the acidic resin is used.
・Polymerizable basic compounds can be used as a part of IE Tsuma and incorporated into the resin through copolymerization, and
It is also possible to carry active groups that react with each other on the resin and the basic compound, and introduce the basic compound into the resin by the reaction of these active groups. A functional group that reacts with hydrogen or active hydrogen.

can be mentioned.

In addition, the term "active hydrogen" used in specification P4 of the present application refers to primary, secondary and tertiary hydroxyl groups, acyl bonds,
The edict, which refers to reactive hydrogen atoms bonded to oxygen, nitrogen, etc. contained in urethane bonds, carboxyl groups, etc., is ``a functional group that reacts with active 14 water cords,'' and is classified as 1st class and 2nd class. class, and tertiary human 0xyl group, sardine-1~
It means a group that easily reacts with active hydrogen, such as a group or a glycidyl group.

The basic strength of the basic compound that constitutes an important part of the present invention is expressed as pka, and as a result of the inventors' dispersion experiments, the pka is in the range of 4 to 11. The shape of the baby was also successfully changed.

Examples of the t=l compound having 1lk in the range of 84 to 11 include dimethyl, which is a Φ-merging monomer
minoacrylate 1-, dimebruno 7 minoedyl methacrylate-1-, di-I-delamino pluj' acrylate, di-[pluaminoethyl methacryle-mino 1-thyl methacrylate-h, p-f-plyamino] niburu acrylate-1, 2- Vinylpyridine, 4-vinylpyridine, 2methyl5vinylpyridine, 2-1thyl5vinylpyridine, dimethylallylamine, diallylamine,
Vinylpyrroline, vinylisoquinoline, NN-dimebubu-amino suprabruhinyl ether, 2 (NN-dimebubu-amino)/I-hinylpyrimidine, 1 to lance 1,2 dipyridyl ethylene, 3 cinnamoylpyridine, 2-methyl 5
-cinnamoylpyridine, 4,6-diamino-2-vinyl-5-triazine, and the like.

'Also, the basic compounds containing active water groups in pka4 and 11 include, for example, 1-ly-[tanolamine, dibutyl-tanolamine, cy[del-J-tanolamine,
Monoethanolamine etc. can be used.

On the other hand, the vinyl resin as the acidic resin consists of (1) a neutral vinyl monomer, (2) an l-group-containing vinyl-E-summer, and (
3) Vinyl containing functional groups that react with active hydrogen
Alternatively, (3)' can be obtained by copolymerizing a vinyl monomer having active hydrogen. Among these, representative neutral vinyl bitumers and C are ]-tyrene, propylene, butadiene, isoprene, chloro[J-brene, JW vinyl, vinyl bromide, vinyl fluoride, vinylizone chlorite, methyl vinyl ether, acrylic acid. 2L sprue ((listing is methyl-, ]-pur, butyl) nystyl, etc.), methacrylic acid esters (e.g., m-f, 2-pul, 1-tyl-2-spur, etc.), 21-lyl derivatives (for example, acryloni-1-lyl), , methacrylate [-1-lyl, etc.), styrene, su, brene derivatives (e.g. α-medylstyrene), etc.
Examples of acid group-containing vinyl monomers include carboxyl group-containing vinyl monomers such as acrylic acid, methacrylic acid, itaconic acid, maleic acid, and monomers containing one lambda group such as α-styrenesulfonic acid.

Examples of the functional group-containing monomers mentioned in (3) above include vinyl monomers containing chrycidyl groups (chrycidyl 77 acrylate, glycidyl methacrylate-1, etc.) as isocyanyl group-containing vinyl monomers. You can select Soshi J7 Poo 1~ etc. with the above (
3) As the active hydrogen group-containing vinyl monomer, an alkoxy group-containing vinyl monomer that activates an amide group-containing vinyl monomer such as acrylamide or methacrylamide, clN-methoxymebrol acrylamide,
N-butylheximedylol acrylamide and the like can be used. Alternatively, if the monomer containing the 1j group in (3) above or the active hydrogen group-containing monomer in (3)' is used, C
2-human []xy L-puracrylate, 2-hydroxybutylene methacrylate-1-, 2-hydroxydiyl methacrylate-1-, 2-human [1-t-sib-1]pyru methacrylate-1, etc. - Roxyl group-containing hexamer or N-methyl 1-ylacrylamide can also be used.

As mentioned in Section C, when producing these vinyl resins, the basic compound having a pka of 4 to 11 is mixed with a polymerizable monomer of 1 or 2 or more than 71 and polymerized. The amphoteric vinyl resin for dispersion (-) in () can be used to obtain the following results.

Alternatively, by appropriately selecting one monomer unit of these vinyl resin monomers, an acidic vinyl resin that has a functional group that reacts with active hydrogen or an electron-accepting group that reacts with active hydrogen can be obtained, respectively. Cd can be reacted with an appropriately selected basic compound to obtain an amphoteric dispersing vinyl resin useful in the present invention. The present invention also includes a basic compound and polyIII? The active hydrogen in the acidic resin is reacted with the active hydrogen in the acidic resin by first reacting the socyano-1 compound or the glycidyl compound, and then reacting the basic compound with active hydrogen. It is also possible to introduce a chemical compound into the resin.

“Such a multivalent isodij7 ly 1-[, 1 example (.

Nijir Sociaf-1・Dotoshi2. /I-tolylene diisocyaners 1-, 2.6-h lylene diisocyaners I, and mixtures thereof, 4,4'-diphenylmethane di-
rsocia-J-1, 1m-phenylene diisocyanate, 4,4'-pinol diisocyanate j7 no 1~,
Y5 scented gyosociana -1, and tetrame blank Isociano I ・, 1 Nirime F Range isocyanner 1 ~, A Kuta Megaen Son A: J -1-, etc. -1~, or: Aromatic fats such as isocyanates, isocyanates, etc.
Alicyclic diisodino 7poo1- etc., 1~liisodioi such as
'Nato Doshiku'1. 'l', /l''-1-linonylmethane 1-ly isocyanate, 2./1.4'-
Bifinyl 1 helyisocyanate, 2. /l, /l'
-dinoylmethanetriisocyab 1 and the like.

Isocyanobyl 1.DoshiC which can be used in other parts has two or more human L1 xyl groups in the molecule such as these di- or triisocyanar 1- and silyl or 1-triΔ-yl. 1-addition product, which further contains 2 or more isocyano-1-groups in the reaction product of the reaction with the compound;
Alternatively, there is a compound compound in isocyanate. Examples of compounds having a glycidyl group include tricrycidyl isosyslate, F-dylene glycol, and diglycidyl [-
Dell et al. are preferably used.

In order for the dispersing vinyl resin of the present invention to exhibit good dispersion performance for the coated surface, it is insufficient for the resin to have ampholytic properties such as acidity and base. The base strength is not within the range of <pka/I-・11 as described above, and C cannot be obtained.When this requirement ('l) is satisfied, good interaction with organic pigments occurs, and conventional acidic resins, basic resins, Alternatively, it was confirmed that a high level of dispersion performance not found in amphoteric resins was exhibited.In other words, if the pka of the basic compound incorporated into the resin is less than 4 MMC', C can be used in the present invention. If the pka exceeds 11, the basicity will be high and the final coating performance, especially weather resistance and water resistance, will be improved. etc., causing problems in the use of C as a paint.

It is not until the introduction of a compound having a base strength within the range specified in the present invention into the acidic vinyl resin that various surface properties differ.
Provides an extremely useful vinyl resin for dispersing organic face 1'1 that can be avoided without impairing the dispersion of organic face J"l in coating film ↑ () ability (for J") It will be done.

Since the above amphoteric resin is made by introducing a basic compound with a pka of 4 to 11 into an acidic resin, the obtained amphoteric resin is not simply a mixture of an acidic resin and a basic compound, but is a reaction product of both. , Stability: C@re, raw material: 131 minutes
It has good dispersibility for various types of pigments, and has particularly good dispersibility for organic pigments.

In coating 1', C is very different in one industry.A wide variety of inorganic and organic pigments are used, and the surface characteristics of the coatings are also very different. Even if we think of facial wrinkles in terms of acids and bases, the degree of acidity and basicity differs greatly. Therefore, it is naturally expected that the acid f1 and the basic content C in the dispersing resin will vary from pigment to pigment if the optimum value is sought for each face i1.

Therefore, the wood inventors discovered that itl! is the greatest common denominator for many of the pigments in widespread use today. T! Considering that the acidity and basicity of both fl resins for dispersion may be different, various faces R11 were actually dispersed in the resin for dispersion. We investigated the relevance of diversification effects. However, the acidity of the amphoteric resin and J! Since there is no known simple measuring method that can be used in any non-aqueous system, the present inventors dissolved the dispersion resin of Material 1 in aniline and used n-tetrabutylene hydroxide. Non-aqueous potentiometric titration method C using dilammonium as a titration reagent. Determine the acidity of the resin from the number of moles of reagent required for neutralization using constant suspension. Also, use a sample acetic acid solution and use perchloric acid as a titration reagent. We developed a unique method for measuring the acidity and basicity of amphoteric resins in a non-aqueous system, in which basicity is determined from the number of moles of reagent required for neutralization using constant suspension using non-aqueous potentiometric titration. The base was evaluated at 141 degrees. As a result of the test, the present inventors found that the acidity of the amphoteric dispersion resin was 1.0 to 1.0.
X 10'm mol, 7g 5olid, especially preferably 0.8-2.0x'IO"2m mo
l, g5olid) range, and the basicity is 1
, 0-5 X 10' m mol, 7g 5oli
d, particularly preferably 1.0·-·−I×10”
m mol, /gsolid, it has good dispersibility against various inorganic paints (this organic pigment) and organic pigments used in the present invention. We also learned from experience that it exhibits a high degree of dispersion. Accordingly, a preferred embodiment of the present invention (13) provides a dispersion base composition comprising a vinyl resin for dispersion, a pigment, etc., which exhibits acidity within the above range and traces of base ↑11 in the test method described in the specification of the present application. be given

On the other hand, as a vinyl resin for dispersion, it is important not only to have good dispersibility in the 1-face format, but also to have good compatibility with various resins used for dilution or solubility in various solvents, and to ensure that the paint is Since it is used as a film, it is naturally required to have good final coating properties in terms of coloring properties, physical properties, chemical properties, durability, and weather resistance. The present inventors (I) found that the weight ratio of the J hub mixture in the reaction between the acidic resin (△) and the basic compound (13) was 99.9 (A) in terms of the solidity of the resin. ~50% by weight to B) 0.1·~50% by weight, most preferably (△) 99°9 to 60% by weight and (B) 0.1····/
There is IO weight % C, and the molecular weight of the dispersing resin is 19. 1 to 500 to 100,000 in terms of polystyrene when measured with Granoy, most or 1. is 'I OOO-・50.000, and the galactic transition temperature is 130°C to 80°0, preferably 1
It has also been found that the best results can be obtained when the temperature is between 0°C and 5Q°C. Accordingly, in the most preferred embodiment of the present invention, the acidic and basic compounds of the vinyl resin for dispersion [herein, the resin that satisfies the above various parameters is
1 can be used for dispersion.

The dispersion base composition of the present invention is obtained by dispersing 11 pigments using the dispersing vinyl control specified herein. In this case, organic pigments commonly used in paints are used as pigments, such as quinacridone-based Kao H1 (Shinkasha Red Y, Jinkashi Oni Bai A Lettu l-, Hosta Parm Lettu, Do, Varioven Red, Monolight Bai A Retsu 1~, etc.), l\\nzoicidazo [1-based pigments (phos all par 11kei-a-L13G, bosta palm orange
I
1-1-, Palitor Yellow 214 OLI D, etc.)
, Yanoftan type face t! + (Paris A1 - Le n -
0960+1o, etc.), perinone pigments (Hostapa-)＼
A-Range GR, etc.), perylene pigments ((Lugazine Red [3PT, Tsubaba Balm Red B, Bali A-Gen Red 3910, etc.), dioxazine pigments (Chroneptahthalbai Δlet, Hoster Palm By A-Rel-R1,
, etc.) are mentioned.

The mixing ratio of the vinyl resin and pigment for the earthen floor is as follows:
To make it +1, C is further diluted with resin or solvent.
Therefore, it can be arbitrarily selected without critical C, but taking into account the lightness of dispersion-based production, the dispersion efficiency, etc., the resin (solid content) is usually 10 to 90% by weight and the face R is 190 to 10. Weight % ratio C1 and preferably resin (solid content) 30-70
% by weight and face 1' proportion C of 170-30% by weight is used.

゛The dispersion base composition of the present invention has the above pka/I.
・Mix 11 Jltit base compounds with 39 dispersible polyester resins and one or more organic pigments, and if necessary, add solvents commonly used in the paint industry, such as 1 -Ruen, Yashiren, Tsurupets 10
0, hydrocarbon solvents such as Tsurpez 150, ester solvents such as 1 tyl acetate, butyl acetate, N・ILI<, M
I'3 Add one or more ketone solvents such as K, and add the usual amount of
9J is manufactured using a ball mill dispersion machine of 1 scale, a non-dog line of 1 scale, a hemil dispersion machine of 1 scale, a planetary mixer of 1 scale, a high speed ice spar dispersion machine of 1 scale, etc.

The thus obtained dispersion phase parabolite exhibits excellent dispersibility, stability during storage, excellent compatibility with various resin solvents, and excellent dispersion base. As a paraboloid, C is extremely useful.

The present invention will be explained below with reference to typical production examples and examples of the dispersing vinyl resin used in the present invention. In these production examples and examples, parts or percentages are by weight unless otherwise specified. 1 Production Example 1 Production of acidic vinyl resin (1) Into a reaction vessel equipped with a stirrer, a nitrogen gas inlet tube, a temperature of 81, and a dropping point -1-, 140 parts of 1)-butanol and 40 parts of 1)-butanol were added, and the mixture was heated under a nitrogen stream. It was heated to 105°C.

In this reaction vessel, 211 parts of methacrylic acid, 123 parts of acrylic iQ n-, /pur, 60 parts of methacrylic acid 2-human[]nihairside, 6 parts of acrylic acid, and [-methylbaxy2-ethyl] were added. A mixture of 1.4 parts of Nilino-4 was added dropwise to the mixture for 3 hours (the mixture was stirred and mixed at a constant speed).

After the dropwise addition was completed, the product was kept at 105°C for 30 minutes, and then 20 parts of toluene and 1:1 of [-butylperoxy-2-ethyl] were added.
1 drop of a mixture of 1 to 2 parts of turmeric to 1 to 30 drops
Drop it at a constant speed over a period of 3 minutes, then continue for 1 hour after step 3.
After moisturizing at 105°C for 0 minutes, 240 parts of Toludo was added and cooled to give a resin solid content of 49.6% and a viscosity of Y' based on bubble viscosity.
Heel resin with c color number 1 (acid 1 (1 resin) is 19).

Production Example 2 Vinyl dispersion resin 1. Example 4: Synthesizing the resin and solidifying the resin in the same manner as in Production Example 1, except adding 1.8 parts of dimethylamino dimethacrylate, which is necessary for the synthesis of the vinyl resin of IC. Type content 48%, viscosity due to bubble viscosity nj 7t, number of colors 3, acidity 2, 2 x
10′ m +nol /′Q 5oli ([, basic a 1 , 3x 10′ m mol /g 5o
I got a vinyl dispersion resin for the lid.

Hitotsuno, dimethyl j? Substitute for 8 parts of minomethacrylate (manufactured except for using 5.5 parts of 2-heal pyridine)
4 In the same manner as in Example 1, the viscosity Z due to the bubble viscosity 81, e therefore 5CrFflI1. ffJ, 2.2X 10'ml
11(+1/'US(+lid, basicity 1, 3
A heel dispersion resin (■) of x 10' mmol 7g 5olirl was obtained. The pkas of Shimebru 1-minoethyl methacrylate-1 and 2-vinylpyridine used in Production Example C were 10 and 7, respectively.

Furthermore, for comparison purposes, vinyl outside the present invention]! Dispersion, dispersing resin and
□・Basic with a pka of 4 or less [vinyl vinyl I as a material] 5.5 parts of IJ ton (pkaO) was used to make 4 parts of 8 parts of dimethylaminoedyl methacrylate used in the production of vinyl dispersion resin (■). , Resin 4 was synthesized in the same manner as in Production Example 1 except for the formation, and the bubble viscosity was 7, the number of colors was 3, and the acidity Tα was 2.2×10−1 mm.
ol,'! ] S+1li (1, basic 1vi, 3
x 10'u+n+.

l, /g 5solid vinyl content 11 (resin Ill
I got it.

Example 1 +lA Example Fabrication 12 Each of the obtained acid 411 resin (■), dispersion resin 1, I [and ■] was diluted with M I +-3K to prepare a varnish with a resin solid content of 30%. . 88 parts of each varnish (Kojinkashi V Red Y (manufactured by Decobon Co., Ltd.) and 12 parts was coated with a 3G mill for 311 tik L 1.
:.

The viscosity of each amount of dispersion obtained is the viscosity of the insolate type HI.
(Fp, ++ viscosity ff+, Tokyo Keiki Co., Ltd.) was used for measurement, and the results shown in Table 1 were obtained.

(2) Due to the use of viscous acidic resin (2) at low shearing speed (19°5 sec'), the dispersion system shows a large speed dependence. On the other hand, the use of dispersing resin (1) improves the viscosity and rate dependence of Ci 11 fil at low shearing rates, but this is not sufficient.

It can be seen that by using the dispersing resins 1 and 2, the dispersion amount showed nichotonic flow and had a good 1/1 aggressiveness of 0.

Add 100 parts of an acidic resin to 100 parts of the obtained dispersion product, and further add 40 parts of melamine-formaldehyde 1-resin, Co-Pan 128 (Sannan-To 11T: manufactured by Co., Ltd.) as a cross-linking agent and bake it to make a "type vinyl". Adjusted resin paint. Spray each paint with a diluted solvent to achieve a viscosity of 0.
．． 3X50X150mm (Japan-Y-Stopanel T industry (
Co., Ltd.) and baked for 30 minutes at 140°C.The image clarity and 20° mirror gloss were measured and the results shown in Table 2 were obtained.

Acidic resin (2) has poor gloss and image sharpness, but the use of dispersing resin (2) improves both quality, but it is still not sufficient.

Dispersion resins (1) and (2) are excellent in gloss and sharpness.

Example 2 Each of Acid 14 Resin (1), Dispersing Resin, and (2) obtained in Production Examples 1 and 2 was diluted with M[BK to prepare a varnish with a resin solid content of 30%. S
G Mill 03 hours of dispersion.

To 70 parts of each of the obtained dispersion amounts, 70 parts of acidic resin and 30 parts of melamine-formaldehyde resin and Kneepan 128 (manufactured by Mitsui Higashi Yt' Co., Ltd.) as a crosslinking agent were added and baked (=
The vinyl resin coating of J type was adjusted to be ≧1.

Spray coating 8 coats ¥31 with diluted solvent (dilute this,
Tin plate 0.3X50xl 50mm (Japan Death 1~)
＼Spray painting on Nell Kogyo Co., Ltd. 1/IO'C 3
A coated plate was prepared by baking for 0 minutes.

The 20' gloss and sharpness of the coated plate are shown in Table 3 (shown) By using J-0 dispersing resins (1) and (2), it is possible to obtain a coating film with excellent light and sharpness.

Claims (7)

[Claims] (1) In the acidic vinyl resin having an electron-accepting group, pka
A dispersion base composition comprising an amphoteric vinyl resin for dispersion into which 4 to 11 basic compounds are introduced, and an organic pigment. (2) A patent in which the dispersion cylinder 1-1 hinyl resin is made by copolymerizing the raw material of acidic vinyl resin with the Φ-merizable base bamboo compound 7-mer with pka /1 to .11. A composition according to claim 1. (3) The amphoteric vinyl resin for dispersion consists of acidic vinyl 101 resin and pka'A resin each having 10 active groups capable of reacting with phase n.
~11 bases (i by reacting with compound i)
q. The composition according to claim 11n. (4) The amphoteric vinyl resin for dispersion contains 99.9 to 50% by weight of an acidic vinyl resin and 0.1 to 50% by weight of a basic compound of 1+ka 4 to 11 (Claims) The composition according to item 1. (5) Number average molecular weight of both 1-1 resin for dispersion (Gel Permeability) Chroma 1 ~ Graph f measurement, Polybrene 1 @ Underwear) 500 ~ ioo, o'oo, canth transition temperature polishing -30°C -. The composition according to any one of claims 1 to 1 in, which is a resin at 80°C. (6) Both 14-vinyl resin for dispersion was subjected to non-aqueous potentiometric titration using 1)-tetrabutylammonium hydroxide as a titration reagent in an aniline solution, and the acidity was expressed as the number of moles of reagent required for neutralization (C). 0=1.0X10'm mol 7g
5olid, basicity 1.0-5°OX 10'm expressed in moles of reagent required for neutralization by non-aqueous potentiometric titration using perchloric acid as a constant reagent in an acid-resistant solution.
A composition according to any one of claims 1 to 5, having a mol of 7 g 5 solid. (7) A composition according to any one of claims 1 to 6, comprising 16-90% by weight of an amphoteric vinyl resin for dispersion (solid content) and 90-1-0% by weight of an organic pigment.