FR2551764A1 - ALUMINUM ALLOY PIGMENT - Google Patents

Abstract

AN ALUMINUM ALLOY PIGMENT OF THE PRESENT INVENTION INCLUDES AN ALUMINUM ALLOY CONTAINING FROM MORE THAN 25 BY WEIGHT TO 50 BY WEIGHT OF ZINC AND 10 TO 25 BY WEIGHT OF SILICON, THE COMPLEMENT BEING ALUMINUM WITH IMPURITIES RESIDUAL. THE ALUMINUM ALLOY PIGMENT HAS EXCELLENT ANTI-CORROSIVE AND HEAT RESISTANCE PROPERTIES. TO FURTHER IMPROVE THE HEAT RESISTANCE PROPERTY OF THE PIGMENT, THE ALUMINUM ALLOY PIGMENT MAY CONTAIN 0.01 TO 0.2 BY WEIGHT OF INDIUM AND OR 0.01 TO 2 BY WEIGHT OF TIN. IN PARTICULAR, THE PIGMENT PREPARED BY GRINDING ATOMIZED ALUMINUM ALLOY PARTICLES USING A HIGHER ALIPHATIC AMINE AS A GRINDING AGENT SO AS TO CONTAIN 0.05 TO 3.0 PARTS BY WEIGHT OF THE AMINE PER 100 PARTS BY WEIGHT ALUMINUM ALLOY PROVIDES THE FILM WHICH HAS A HIGH HARDNESS AND IS DIFFICULT TO BE RELEASED ON Suddenly HEATING AT A HIGH TEMPERATURE.

Description

Aluminum alloy pigment.

BASIS AND SUMMARY OF THE INVENTION:

  The present invention relates to an aluminum alloy pigment having excellent anti-corrosion and heat resistance properties. In the case of large buildings, bridges, tanks and the like recently under construction with reduced lead time and labor saving, a blocking is adopted. Depending on the blocking, steel plates are subjected to sandblasting to remove scale, rust and the like followed by coating using a printing layer in the workshop Then the steel plates are assembled into blocks by heat treatment stages such as cutting with a torch , 15 melting, soldering and quenching and the cantons as well

  built are subject to a coating of cantons.

  The printing layer in the workshop is used to prevent the steel plates from rusting until the coating of the cantons and it is asked to have an excellent anti-corrosion property and, also, the layer of impression in the workshop to have an excellent heat resistance property due to the fact that the films deposited by means of the printing layer in the workshop are subjected to heat treatment Currently, among the printing layers in the workshop, commercially available, for example a printing primer, a zinc-rich primer, a zinc-free primer and the like, it is preferred to use the zinc-rich primer which is a paint incorporating a large amount of a zinc powder inorganic as a pigment in a binder such as an alkali silicate, an alkyl silicate, etc. The zinc-rich primer exhibits an excellent anti-corrosion property because the zinc has an anodic reactive effect with respect to iron sufficient to prevent the steel plate from rusting. Such an excellent anti-corrosive property cannot, however, be maintained when the steel plates coated with the zinc-rich primer are heated to high temperature even when using as an alkyl silicate or an alkali silicate which are heat resistant Because zinc readily volatilizes in smoke during the heat treatment because of its low melting point, we cannot expect the reactive anodic effect with respect to iron since the zinc has already disappeared from the film. Furthermore, the zinc smoke produced is troublesome since it is toxic therefore to be handled with particular attention In addition, there is another problem in the zinc-rich primer, namely that the film deposited with tends to crack or tear when e the film is suddenly heated to high temperature As mentioned above, the zinc-rich primer is unsatisfactory with regard to the strength

in the heat.

  It is known that an aluminum-zinc alloy in which aluminum which has an excellent heat resistance property is incorporated to improve the heat resistance property of the zinc-rich primer is used as a pigment To further improve the property of heat resistance, it has also been proposed to add a minor amount of the other ingredient used in the composition of alloys such as indium. However, these alloys cannot be guaranteed to have both the properties anti-corrosion and heat resistance since the heat resistance property is more improved and the anti-corrosion property is on the contrary decreased simultaneously with the increase of the aluminum content Consequently, it has not been found until '' now pigments with both anticorrosive properties and

heat resistance.

  An object of the present invention is to provide

  the pigment with satisfactory anti-corrosion and heat resistance properties.

  An object of the present invention is to provide

  the pigment whose anti-corrosion property can be maintained after being heated to high temperature.

  These and other objects of this

  invention will become apparent from the following description. 10 The preceding and other objects will be

  made with the pigment of the present invention in which an appropriate amount of silicon is added to the pigment

of aluminum-zinc alloy.

  An aluminum alloy pigment of the present invention (hereinafter referred to as "the present pigment") comprises

  an aluminum alloy containing from more than 25% by weight to 50% by weight of zinc and 10 to 25% by weight of silicon, the balance being aluminum with inevitable impurities.

  DETAILED EXPLANATION OF THE INVENTION:

  As mentioned above, zinc has a fairly reactive anodic effect with respect to iron and gives the pigment an excellent anti-corrosion property. The zinc content in the present pigment ranges from more than 25% by weight to% by weight When the zinc content is 25% by weight or less, it is impossible to obtain a pigment having an excellent anti-corrosion property. On the other hand, when the zinc content is greater than 50% by weight, it is

  also impossible to obtain a pigment having an excellent heat resistance property. The zinc content is preferably 30 to 40% by weight.

  The silicon contributes to the improvement of the anticorrosive property of the pigment although it is theoretically impossible for the silicon to exhibit the reactive anodic effect with respect to iron. The improvement of the anticorrosive property by addition of silicon is probably due to the fact that silicon draws the reactive anodic effect of aluminum with respect to iron One can theoretically expect that aluminum presents the reactive anodic effect with respect to iron sufficient to prevent the steel plate from rusting but in fact we do not observe such an effect at all because the aluminum tends to quickly form on its new surface a coating in the passivated state which is not electrically conductive Therefore silicon is supposed to act to prevent the formation of passive coatings and / or form coatings with high conductivity, while the reactive anodic effect of aluminum with respect to iron is combined with that zinc to improve the pr anti-corrosive opriety of the pigment while retaining the heat resistance property of aluminum The silicon content in the present pigment is 10 to 25% by weight When the silicon content is less than 10% by weight, it it is impossible to improve the anti-corrosion property of the pigment Furthermore, when the silicon content is greater than 25% by weight, the anti-corrosion property is rather reduced since the electrode potential of the alloy approaches that of iron when increasing the added amount of silicon which is noble with regard to the electrode potential

  compared to iron The silicon content is preferably from 12 to 20% by weight.

  The formulated aluminum-zinc-silicon alloy can retain its excellent anti-corrosion property when heated to high temperature, for example to about 7000 C. To further improve the heat resistance property, the present pigment may contain a minor amount of indium and / or tin as the fourth constituent part of the alloy The pigment in which 0.01 to 0.2% by weight of indium and / or 0.01 to 2% by weight are added of tin to the above-mentioned aluminum-zinc-silicon alloy 35 has an excellent anti-corrosion property when it is heated to a temperature above about 7000 C, for example about 8000 C. The improvement of the property heat resistance by addition of indium and / or tin is probably due to the fact that the coatings are formed on the surface of the alloy particles to prevent oxidation of the alloy or volatilization of zinc since the boiling points of these metals are high although e their melting points are very low The content of indium in the present pigment is 0.01 to 0.2% by weight When the content of indium is outside the above-mentioned range, it is insufficient to give the pigment an improvement in its heat resistance property The content of

  indium is preferably from 0.02 to 0.10% by weight. The content of tin in the present pigment is from 0.01 to 2.0% by weight.

  When the tin content is less than 0.01% by weight, it is not sufficient to give the pigment the property of heat resistance. Furthermore, when the tin content is more than 2% by weight, the

  anti-corrosive property of the pigment is on the contrary lowered.

  The tin content is preferably 0.02 to 1.0% by weight.

  As mentioned above, the present pigment has both anti-corrosive and heat resistance properties. And, the present pigment produces a film which is very difficult to peel off when suddenly heated to high temperature due to the addition of silicon in the pigment In this case, the silicon is supposed to act in the direction of improving the adhesion of the pigment with the binder so as to obtain a film firmly bound to the binder In addition, as the present pigment has a specific gravity rather lower than that of the anterior zinc pigment, it hardly sediments in the paint and its handling is easier although the anterior zinc pigment deposits easily and easily in the paint so that it is necessary to shake

  strongly and continuously during application.

  The present pigment can be in any form, for example in the form of spheres, grains, drip, flakes or the like, or mixtures thereof. The most preferable form is the flake form because the speed of sedimentation is low and the covering power by opacity is also great to really prevent the film or the steel plate from being oxidized by the air or from rusting under the influence of the corrosive substances of the air And their particle size can be in the range of 0.5 to 1000 microns For a thin, smooth film, their particle size is preferably not more than 100 microns, more preferably not more than 63 microns, even more

  preferably not more than 44 microns.

  The present pigment can be prepared by any known methods The typical methods for preparing the present pigment are as follows: (1) atomization of the molten aluminum alloy in an atomization medium such as air or inert gases; (2) dropping the molten aluminum alloy onto a cooled drum or rotating disc; (3) shredding an aluminum alloy sheet

(or ribbon).

  When the pigment having the desired particle size cannot be prepared by the above-mentioned methods, or the pigment is desired in the form of flakes, it is possible to subject the particles thus atomized or the sheet thus shredded to mechanical grinding. additional in a mill such as a 30 ball mill, a friction mill, a vibrating mill or the like. Mechanical grinding is either dry grinding in the presence of an inert gas or wet grinding in the presence of a solvent such as mineral spirits using a grinding agent. As grinding agent, acids can be used. higher fats, aliphatic alcohols

  higher, higher aliphatic amines and the like.

  Among them, higher aliphatic amines are preferable in order to obtain a film having a high hardness and which is difficult to tear off after having been abruptly heated to high temperature. This phenomenon can be observed particularly when the present pigment is incorporated in an alkyl silicate as binder for formulating the paint which is hardened by hydrochloric acid, probably because the amine once fixed to the surface of the aluminum alloy particle can be easily desorbed by the action of hydrochloric acid to form a salt and therefore a hydrophobic coating formed of an aliphatic amine adsorbed on the surface of the particle disappears to allow the surface of the particle to be active, thus the aluminum alloy particles can be firmly bonded using the binder

of alkyl silicate.

  The following higher aliphatic amines are given as examples Caprylamine, laurylamine, myristylamine, stearylamine, oleylamine, dilaurylamine, distearyline, dimethyloctylamine, dimethydecylamine, dimethyllaurylamine,

  dimethylmyristylamine, dimethylpalmitylamine, dimethylstearylamine, tricaprylamine, methyldistearylamine, methyl dilaurylamine and the like, or mixtures thereof.

  The amount of higher aliphatic amine used is adjusted to contain the amine in an amount of 0.05 to 3.0 parts by weight per 100 parts by weight of the aluminum alloy particles When the amine content is less than 0.05 part by weight, the dispersing power of the particles decreases because the particles strongly adhere to one another although the hardness of the film is satisfactory On the other hand, when the amine content is greater than 3.0 parts by weight, the hardness of the film tends to decrease and thus a film having a low hardness cannot be obtained.

  that the dispersing power is good.

  As mentioned above, mechanical grinding

  using the appropriate amount of higher aliphatic amine as a grinding agent is effective in providing a film with high hardness.

  After subjecting them to wet milling, the larger or coarser particles are removed by sieving through a sieve such as a vibrating sieve and the like and the solid phase is separated from the liquid phase to form a cake with a metal content of 85 to 90% In the next stage of mixing or kneading, the metal content is finally adjusted to the quantity

  desired if necessary by adding suitable additives to obtain flake-like particles.

  As a variant, after having subjected them to grinding at

  dry, the particles are classified in an inert gas atmosphere to collect the particles in the form of flakes.

  The mixing or kneading step can follow.

  In the mixing or kneading step, if necessary, the flake-shaped particles thus obtained are mixed with the particles having a particle size of less than 63 microns in the form of

spheres or dripping.

  In addition, adding a minor amount of higher fatty acid or higher aliphatic alcohol to the present pigment is effective in increasing the life of the paint. The present pigment which has excellent anti-corrosion and heat resistance properties is useful for incorporation into paints such as shop printing coats and heat resistant paints.

  heat, and coating formulations and the like.

  The present pigment is incorporated in a binder

  to formulate a painting in any known way.

  Any binder known for painting can be used as binder. Epoxy resins, alkyd resins, silicone resins are given as examples.

  preferable is an alkyl silicate, an alkali silicate and an alkyl titanate which are excellent with respect to the heat resistance property.

  The volume concentration of pigment of the present pigment in the paint is generally about 20 to 50% by volume. In the case of the pigment comprising the atomized aluminum alloy particles, 30 to 50% by volume are preferable. the case of the pigment comprising the ground aluminum alloy particles 20 to 40% by volume are preferable since the absorption value of the oil

is relatively high.

  The paint formulated to incorporate the present pigment can be applied in a suitable manner. For example, an air spray application, an airless spray application, a brush application can be used as the application manner. The present invention will now be described.

  in the following examples and comparative examples.

  Examples 1 to 10 and Comparative Examples 1 to 9: An aluminum alloy having the composition described in table 1 is prepared according to the air atomization process. The aluminum alloy is sieved through a sieve of 0.033 mm ( 350 mesh) to collect aluminum alloy particles whose particle size is less than 44 microns The particles thus

  recovered are used as pigment incorporated in a paint.

  In Comparative Example 1, zinc powder No 3 (manufactured by Mitsui) is used as pigment

Mining and Smelting Co, Ltd).

  The paint is formulated by incorporating the pigment 35 thus prepared in a varnish containing 50% by weight of 40 O ethyl silicate (manufactured by Tama Kagaku Kogyo Co, Ltd), 1% by weight of an aqueous hydrochloric acid solution. at 5%, 43.2% by weight of isopropyl alcohol and 5.8% by

weight of demineralized water.

  The content of the pigment in the paint is adjusted to 0.8% by volume relative to the specific mass of the alloy. The paint thus formulated is applied using a brush on a sanded steel plate 10 70 x 150 x 2.3 mm in size so as to form a film having a thickness of approximately 30 microns after

  drying The plate is dried at room temperature for four days after deposition of the coating and the dried plate is then used as a sample for the following tests.

(1) Salt spray test:

  This test is carried out according to the JIS K-5400 standard.

  After 300 hours, the state is observed with the naked eye

  abraded parts and the total surface of the film 20 to assess the extent of the rust.

  This test is carried out before and after the

heating 2 next.

  (2) Heating test: First, the sample is heated in an electric oven from room temperature to 7000 C for about 45 minutes to observe the condition of the film.

(heating test 1).

  Alternatively, the sample is heated from room temperature to 700 o C for about 4 hours, kept at 700 ° C for 30 minutes and allowed to cool to room temperature to observe the condition

  film (heating test 2).

  The results are shown in Table 1.

  In any of the examples and comparative examples, no tears or cracks in the film were found when heated slowly in heating test 2.

Table 1

  Composition (Weight%) 1 Zn Si A 1 i Zn Si A 1 ,, Calculated specific mass Heating test 1 Salt spray test a Before test After After rEalff test: 1 'l, 4: rb ,, ___ I Ul CUL =, '-.1 i _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _} 1 7 :; 1 i D C r I ple J. / o

40 50 26 40 50 26

50

18 18 18

10 10 25 25 25

Db

52 42 32

64 50 40 49 35 25

3.8

4.0 4.4

4 8 4.4 4 7 9 3.8 4.4 4 r 8 4 r 8

7.1 2.7 2 1 7 4.9 318

, 1 5.0 5.3 4.3 4 8

  O O O O O O O O O O o o G @ o o o _ t i O o O o o o o o t- Comparative example

25 55 55 60 40

18 25

30 30

50 75 27 20

30 20

  X xxoooooxoxoxxxxxxxxxx x J Note: D 1 ox we did not observe tearing of the film we found tearing of the film of one we found tearing of the film with a diameter less than 2 ancm greater diameter at 2 on rl Ltn V 4 o'l <Y 2 o å we did not find rust we found a little rust in the abraded parts; and

  x o N found remarkable rust on the entire surface of the film.

  Examples 11 to 17 and Comparative Examples 10 to 18

  The following experiments are carried out to determine the effect of higher aliphatic amines.

  Particles of atomized aluminum alloy 5 having the composition indicated in table 2 are introduced into a ball mill containing 50 kg of steel balls with 0.8 l of mineral spirits and a grinding agent for grinding until the amount of residue having the particle size of 63 microns and above is approximately 2% after sieving through a 0.062 mm (250 mesh) sieve The grinding time varies according to the composition of the aluminum alloy and the quantity of grinding agent used The quantity of aluminum alloy loaded is determined using the following formula: 15 Quantity of atomized aluminum alloy particles (g ) =

  500 x specific gravity of the alloy.

  The ground aluminum alloy particles are washed with 19.2 l of mineral spirits and sieved through a 0.062 mm (250 mesh) sieve to prepare a metallic paste. Then, the paste is filtered. to the proboscis in order to obtain the aluminum alloy pigment

  in flakes with a metal content of around 80%.

  The content of the grinding agent is determined relative to the amount extracted with ether acetone of the aluminum alloy pigment obtained after filtration at

trunk.

  In Comparative Example 10, powder No 3 (made by Mitsui Mining and Smelting Co, Ltd) was used as the pigment And in Comparative Example 18, the atomized alloy particles having the size were used as the pigment particles smaller than 44 microns

  in which the grinding agent is not contained.

  The paint is formulated by incorporating the pigment thus obtained in a varnish comprising 50% by weight of ethyl silicate 40 (manufactured by Tama Kagaku Kogyo Co -, Ltd), 1% by weight of an aqueous solution at 5% of hydrochloric acid, 43.2% by weight of isopropyl alcohol and 5.8% by weight of demineralized water. The amount of pigment in the paint is adjusted to 40% by volume relative to the specific mass of the alloy, provided that in the dispersion test it is adjusted

the quantity at 20% by volume.

  The paint thus obtained is used as a sample for the following tests. (1) Sedimentation test: Sufficiently 100 ml of paint is stirred in a measuring cylinder and then left to stand for minutes to determine the volume of pigment sedimented in the paint (volume of sedimentation). (2) Dispersion test: The pigment is mixed with the abovementioned varnish to have a pigment concentration of 20% by volume in a box, stirred for 10 minutes to determine

  dispersing power by means of a grinding gauge.

  Then, spread the paint using a brush on a sanded steel plate of 70 x 150 x 2.3 mm so as to form a film. The plate is dried at temperature

  ambient for four days after deposition of the coating and the dried plate was then used as a sample for the following tests.

(3) Hardness test:

  This test is carried out according to the JIS K-5400 standard.

  That is to say, the film of the sample is abraded using a lead pencil of different hardnesses. 30 (4) Salt spray test: This test is carried out in the same way as in

Example 1.

(5) Heating test:

  This test is also carried out in the same way as the heating test 2 of Example 1.

  The results are shown in Table 2.

T a b 1 e a u 2

Example

  Comparative analysis Composition (Weight%) Specific mass Content Content Agent grinding volume 1 sedimentation agent Zn Si A 1 grinding (ml) 11 30 18 52 4.0 laurylamine O 4,

12 50 18 32 4 8 O 85

13 30 18 52 4 O 007 9

14 30 18 52 40 I 30 4

  30 18 52 4 0 stearylamine 210 4 16 30 18 52 4 t 0 dilaurylamine 1.5 4 17 30 18 52 410 coconut amine or It O 4 coconut bitter

100 7.1 31

11 50 50 4 9 laurylamine 1.1 '2

12 55 18 27 5.1 "O 8 6

  13 40 30 30 4 t 3 "O 8 5 14 30 18 52 4 0 oleic acid O 8 4 30 18 52 4 0 stearic acid 078 4 16 30 18 52 4.0 laurylamine 0 03 10

17 30 18 52 40 "3 5 4

18 30 18 52 4 O 20

F-

Ni Ln u.

J o 4 Cr% T a b 1 e a u 2 (continued) l

1 1

  m 2 Salt spray test Dispersion power Hardness Before heating test After heating test _ _ _ _ _ _ _ _ _ _ _ _ _ _ I * 1- t I

Example 11

  12 13 14 15 16 17 Comparative example 11 il

13 14 15 16 17 18

o o A o o o o

2 H 2 H 2 H 2 H 2 H 2 H 2 H

        o O CO O @ x o O @ o o o o o o x o o O O O O O X O

2 H 2 H

2 EI 2 H 6 B 6 B 2 H

  B 2 H n <na O @O co xxxxoo Notes: r * 1 o we observe particles with a particle diameter less than 60 microns A we observe particles with a particle diameter of more than 60 microns to less than 70 microns ; and x we observe particles with a particle diameter greater than 70 microns 6 B is the softest and 9 H is the hardest in the hardness scale of the lead pencil

see note 2 in table 1.

  9-q o Examples 18 to 28 and comparative examples 19 to 23

  The following experiments are carried out to determine the effect of the addition of indium and / or tin.

  An aluminum alloy having the composition indicated in table 3 is prepared according to the process of atomization using air. The aluminum alloy is sieved through a sieve to 0.033 mm (350 mesh) to collect the

  aluminum alloy particles having a particle size of less than 44 microns The particles thus collected are used as a pigment incorporated in a paint.

  In Comparative Example 19, zinc powder No 30 (made by Mitsui Mining and

Smelting Co, Ltd) as a pigment.

  In Examples 27 and 28 and in Comparative Example 23, the aluminum alloy particles atomized after sieving through a 0.149 mm (100 mesh) sieve are ground in a ball mill in the presence of mineral spirits and laurylamine as a grinding agent and then sieved through a 0.062 mm (250 mesh) sieve to collect aluminum alloy particles having a particle size of less than 63 microns, which are used

as a pigment.

  The paint is formulated by incorporating the pigment thus prepared in a varnish comprising 50% by weight of ethyl silicate 25 cate (manufactured by Tama Kagaku Kogyo Co, Ltd), 1% by weight of an aqueous solution at 5% of hydrochloric acid, 43.2% by weight of isopropyl alcohol and 5.8% by weight of demineralized water.

  The pigment content in the paint is adjusted to 40% by volume relative to the specific mass of the alloy.

  The paint thus formulated is applied using a brush on a sanded steel plate 70 x 150 x 2.3 mm in size so as to form a film. The plate is dried at room temperature for four days after depositing the film. and then we use the dried plate

255 1764

  as a sample for the following tests (1) Salt spray test:

  This test is carried out according to the JIS K-5400 standard.

  After 300 hours, the state of the abraded parts and of the total surface of the film are observed with the naked eye in order to assess the extent of the rust. This test is carried out before and after the

next heating.

  (2) The sample is heated from room temperature to 8000 C for 2 hours, kept at 8000 C for minutes and allowed to cool to temperature

  to observe the condition of the film.

  The results are shown in Table 3.

Table 3

  Salt spray test x 2 Composition (Weight%) Zn Si In Sn Calculated specific mass Heating test ai Before heating test near heating test

1 I I _

Example 18

19 20 21

22 23 24 25 26 27 28

Comparative exam

19 20 21 22 23

I _ '

50 40 30 30 30 30 30 30 30 30

30 5

  0.05 15 0.05 25 0.02 15 0> 01 15 0.20 20

0705 15 0.05 15

0.02

O 05 N

0.01 0.50 2.0

0.50 0; 50

  0 50 4.0 4.8 4.4 470 4.0 4.0 4.0 4.1 4 t O 4 O 410

7.1 4; O 2.9 219 4.9

  oooooooooooxoooxooooo OOOO axxxooooooof) o oo xxxx J __ _ _ _ _ _ _ _ __ _ _ _ _a_ _ _ _ _ _ a_ _ _ _ _ _ _ _I_ _ _ Note: 1 See note 1 in table 1. See note 2 in the table 1 ro Ln Ln

-Oj c 0.

Claims (1)

CLAIMS 1 Aluminum alloy pigment comprising an aluminum alloy containing from more than 25% by weight to 50% by weight of zinc and 10 to 25% by weight of silicon, the complement being aluminum with inevitable impurities. 2 The pigment of claim 1, wherein the zinc content in the aluminum alloy is 30 to 40% by weight. 3 The pigment of claim 1, wherein the silicon content in the aluminum alloy is 12 to 20% by weight. 4 Pigment of any one of claims 1 to 3, wherein the aluminum alloy additionally contains 0.01 to 0.2% by weight of indium and / or 0.01 to 2.0% by weight 15 of tin. Pigment of claims 1 to 4 which contains 0.05 to 3.0 parts by weight of higher aliphatic amine per 100 parts by weight of the aluminum alloy 6 Pigment of claim 5, wherein the aliphatic amine superior is chosen from a group comprising caprylamine, laurylamine, myristylamine, stearylamine, oleylamine, dilaurylamine, distearylamine, dimethyloctylamine, dimethyldecylamine, dimethyllaurylamine, dimethylmyristylamine, dimethyl25 palmitylamine, dimethylstearylamine, dimethylstarylamine , methyldistearylamine and methyldilaurylamine, and mixtures thereof. 7 Pigment of any one of the claims   1 to 6, which contains a small amount of higher aliphatic alcohol or higher fatty acid.