JPS58168663A - Powdered metal pigment composition and its preparation - Google Patents

Abstract

PURPOSE:To provide the titled compsn. forming a coating film with excellent resistance to acid and alkali and preventing change in color tone of the coating due to flocculation, segregation, etc., prepared by treating powdered metal pigment with organic phosphate compd. CONSTITUTION:The compsn. is prepared by treating powdered metal pigment with an organic phosphate compd. of the formula where R is 6-24C alkyl, 6-24C alkyl-substd. group or aryl which contains at least one 6-24C alkenyl substituent; A is 2-4C alkylene; m is 0-20; R1 and R2 are H, alkyl, alkenyl, aryl or R-(OA)m (R, A and m are the same as above) (e.g. lauryl phosphate or octylphenyl phosphate). It shows improved resistance to water, acid and alkali and good storage stability and retains original color tone without causing color change.

Description

Detailed Description of the Invention The present invention provides a metal powder pigment composition for the purpose of improving water resistance, acid resistance, alkali resistance, and storage stability by treating the metal powder pigment with an organic phosphate compound. and its manufacturing method.

Conventionally, metal powder pigments have been widely used as o*sI@ pigments for passenger cars, wagons, electrical equipment, precision equipment, or architecture, and as pigments for printing inks on paper, plastic snack films, and the like.

Paints made by blending metal powder pigments and coloring pigments exhibit a unique 0-finish 9 appearance and enhance the non-functional quality of products, leading to a sense of luxury! fulfill a role.

In recent years, painting of automobile parts and plastic ivy 01*
A method of applying one coat of metalitta paint has been widely adopted in the construction industry, and paints containing metal powder pigments, especially aluminum powder pigments, are used as paints for architectural applications.

However, conventional metal powder pigments as they are have many drawbacks, such as corrosion of the metal in media containing moisture, alkalinity, and acidic atmospheres, changing the color tone of the metal pigment, and causing discoloration of the paint film. On the other hand, when a suitable amount of an organic pigment is blended with a conventional metal powder pigment to make a colored metallic paint, a phenomenon that cannot be seen in cases where the paint is made with only organic pigments occurs, that is, the blended mourning product paint is preserved. Pigment particles grow over time, resulting in agglomeration, color separation, and other phenomena unique to colored metallic paints that impair storage stability in the paint.
These phenomena are not welcomed from the standpoint of the polish industry.

Based on the above, it is possible to find a metal powder pigment that can produce a stable paint film that has excellent water resistance, alkali resistance, and acid resistance, and that does not cause color changes such as agglomeration or color separation. It is strongly requested.

The present invention overcomes the above-mentioned drawbacks.As a result of extensive studies on metal powder pigments, it has been found that when metal powder pigments are treated with an organic phosphate compound represented by the general formula, they have excellent properties, water resistance, and acid resistance. The inventors have now discovered that a nine-metal powder pigment composition with excellent properties, alkali resistance and storage stability can be obtained, and have thus arrived at the present invention.

The metal powder used in the present invention is, for example, powder of malleable metals or alloys such as aluminum, copper, zinc, brass, iron, and nickel, and these may be used alone or as a mixture. The metal powder is preferably scaly, and scaly metal aluminum is particularly preferred. - Coarse particles are undesirable as they impair the appearance of the paint film (141JI
It is preferable that the K. sieve residue is O,S- or less.

The organic phosphoric acid ester compound in the present invention provides a 11m protective effect of suppressing the reaction of the metal powder by adsorbing on the surface of the metal powder. A preferred organic phosphoric acid ester compound is an organic phosphoric acid ester compound represented by: Komude R is an alkyl group having 6 to 24 carbon atoms, preferably an alkyl group having 6 to 18 carbon atoms, preferably an alkenyl group having 6 to 18 carbon atoms, and preferably an alkenyl group having 6 to 18 carbon atoms.
u1 represents an aryl group having at least one alkyl substituent having preferably 1 to 18 carbon atoms or an alkenyl substituent having 6 to 5 carbon atoms, preferably dna-is, and M represents an aryl group having one or more carbon atoms.
, preferably represents 2 to 3 fullkylene groups, m is 0-
20°, preferably 0 to 10. More preferably, it is from 2 to $, and R8 and R1 may be the same or different, and are hydrogen, an alkyl group, an alkenyl group, an aryl group, or R-(0m)m (where R1 and m are as shown above).

Examples of the alkyl group or alkenyl group in R9R1,R are hexyl, heptyl, octyl, nonyl, decyl, undecyl, tucryl, tridecyl, cetyl, stearyl, oleyl, hequinadecyl, tocosyl,
Examples of the aryl group in O R, R,, R, include tetotsusyl,
Octylphenyl, nonylphenyl, dodecylphenyl, dinonylphenyl natka tt, i.

Ethylene and propylene are preferred as the rubber. When R is an alkyl group, specific compounds include hexylphos 7ate, heptylphos 7,8, decyl phosphate, undecyl phos 7ate, lacryl phosphate,
Tridecylphos 78.

myristyl phos-7ate, pentadecyl phosphate,
Nonadecyl phosphate, eicosyl phosphate, eicovir phosphate, tocosyl phosphate, tricosyl phosphate, tetracosyl phosphate, no-methyl-7-ethyl-4-undecyl phosphate,
! , @, L-)limethylnonyl phosphate and these ethylene oxides, propylene oxides,
Examples include butylene oxide adducts. When R is an alkenyl group, 4-dodecynyl phosphate, cis-9
Examples include -octadecyny^phosphate, S-methyl-2-nonynylphosphate, s,9-dimethyl-dimethyl-decynylphosphate, and adducts thereof with ethylene oxide, propylene oxide, and butylene oxide. Furthermore, when 凰 is an aryl group, examples thereof include octylphenyl phosphate, nonylphenyl phosphate, sulfate, dodecylphenyl phosphate, and adducts of these with ethylene oxide, propylene oxide, and butylene oxide. The phosphoric acid ester may be any mono-, di-, or tri-ester, or may be a mixture thereof. Furthermore, a mixture of different types of phosphoric esters may be used.

Furthermore, these organic phosphate ester compounds are combined with ammonium, sodium hydroxide, and potassium hydroxide.

It can be used after being neutralized with a basic substance such as diptylamine, tributylamine, monoethanolamine, diethanolamine, triethanolamine, and morpholine.

The organic phosphate ester compound is 001 to the metal powder.
-10 weight 91. It is preferably used in a range of 1 to io weight. Here, if the amount of the organic phosphoric acid ester compound used was less than o, ooi by weight, the performance aimed at by the present invention could not be obtained. If the weight of the we type increases, the physical properties of the coating film will deteriorate.

Here, organophosphoric acid for metal powder pigments
.

The ester compound may be added and mixed in any manner, such as when grinding the metal powder or during a mixing process in which the metal powder is made into a paste.

In general, the method for producing scaly metal powder involves adding metal particles and a grinding aid to improve grinding efficiency into a grinder such as a ball pickle. Alternatively, the Ozawa grinding method in an organic solvent such as other solvents, or the dry grinding method in a W atmosphere is used. At this time, saturated or unsaturated fatty acids, aliphatic amines, etc. are generally used as grinding aids. , metal salts of fatty acids, etc. are used. According to the invention.

The organic phosphoric acid ester compound has a sufficient function as a grinding aid, and can be used alone as a grinding aid or in combination with conventional aids.

In addition, the raw metal powder may be ground using a grinding aid, and after the grinding is finished, an organic v/acid ester compound may be added to make it more gentle, or a predetermined amount of organic phosphorus may be added to both the grinding process and the kneading process. The acid ester compound may be added in portions.

Various additives may also be used in combination with the composition of the present invention depending on the necessity.

The composition of the present invention obtained as described above is immediately useful as a pigment for organic solvent-based (oil-based) paints or printing inks.

The present invention will be fully explained in detail below with reference to Examples.

Example 1 and Comparative Example 1 4 m for granular aluminum powder 10! ! A mixture of 10 parts by weight of general spirit containing 10 parts by weight of stearylamine was milled in a ball mill for a period of time, then 2 parts by weight of general spirit
After diluting by adding 0-, it was transferred to a slurry tank and filtered 9 times using a filter press.

The filter press cake thus obtained had a heating residue of 90% by weight and a mineral spirit of 11% by weight, and the sieve residue of the aluminum powder in 14s JIIK was 0.1% or less.

For 100 parts by weight of this filter press cake, 1
As shown in the table, mix a predetermined amount of the specified organic phosphate ester compound, add Tsurubento Nafuna so that the heating residue becomes 65%, and mix evenly with SO'C to make the heating residue. (Oil-based aluminum base) 1 was obtained. In order to compare the present invention, no organic phosphate compound was added.
Retsuka adjusted the oil-based aluminum paste using exactly the same procedure.

About the obtained oil-friendly aluminum paste.

The storage stability was investigated, and the appearance and storage stability of the water resistance, acid resistance, and alkali resistance of the silver metallic paint were evaluated, and the storage stability of the colored metallic paint was also evaluated.

The test method used is as follows.

(1) Storage stability of aluminum paste Aluminum leek paste was placed in a 500 F paint can (made of tin) and its properties were examined after storage at 50°C for one month.

(2) Evaluation of silver metallic paint A metallic paint was prepared with the following composition, and the paint was applied with a doctor blade, and the properties of the paint film were visually evaluated.

, 1 Commercially available air-drying acrylic lacquer 10 parts by weight Commercially available thinner 1 m, 1S parts by weight Aluminum paste (metal content) 6.5 parts by weight (a) Water resistance: Appearance of a paint film immersed in water for a period of time Observe with the naked eye.

佽）Full voice resistance; s-NaOH solution tube coated with 1 full amount, 114 at room temperature
After standing for a period of time, it was washed with tap water and the appearance of the coating film was observed with the naked eye.

(c) For guests, l'L: Pour 1 full of 5-H, 80, solution onto the coating film and heat it at room temperature for 24 hours.
After standing for a period of time, it was washed with tap water and the appearance of the coating film was observed with the naked eye.

(d) Storage stability of the paint; The above compounded paint was left at 50°C for 1 month, and the JI8 rating was 540.
Stability was evaluated by the 00 gauge method.

(3) Evaluation of colored metallic paint A colored metallic paint was made with the following composition, and the storage stability of the paint at 50°C x 1 month was evaluated using SOOMesh sieve residue and the crush gauge method for 1+ paint film. Evaluation was made based on color difference (ΔE).

Resin 2 Commercially available acrylic resin (resin content 5 -) 4 Commercially available melamine resin (resin content 50 cm) 1, Set Aluminum paste (metal content) st Yellow-yellow pigment anthravirididine 1.1! fP
al iogen (BASF) solvent
Examples of margins below 65 f! A mixture of mineral spirit 164 containing 10 kg of granular aluminum powder and 5 weight of tridecyl phosphate as an organic phosphoric acid ester was ground in a ball mill for 8 hours, then 0 kg of mineral spirit was added to dilute it, and then transferred to a slurry tank. Pass through filter press. The filter press cake thus obtained had a heating residue of 88 weight.

Mineral Spirit L! It's ilt1g and 141jI
The sieve residue was below IIs. Solvent naphtha was added to this filter press cake so that the heating residue was 6S%, and the mixture was uniformly kneaded at 30°C to obtain an oil-based aluminum paste. The paste and paint performance of the obtained aluminum paste was examined in the same manner as in Example 1. As a result, all properties were good and no change was observed.

Example 3 Granular zinc powder 1sK4. A mixture of 10 - weight of oleic acid and 10 - weight of Honetsuru Spirit is ground in a ball mill for S hours, then diluted with addition of mineral spirit, transferred to a slurry tank, and passed through a filter press. The sieve residue in J+ and 141J+ was 1- or less in terms of the filter press cake addition heat residue sO weight - obtained in this way and mineral spirit 16 weight -.

Polyoxyethylene (number of moles added: 6 moles) and stearyl ether phos 7-ate were added 3 to 10 times by weight of this filter press cake (1 weight).
A weight and a predetermined amount of mineral spirit were added, and the mixture was uniformly kneaded at the casting temperature for 1 hour to obtain a zinc paste with a heating residue aSS. The physical properties and paint performance of these zinc pastes were examined in the same manner as in Example 1.

As a result, all properties were good] and no changes were observed9.

Example 4 Granular copper @ 1ily, 8 wt. of stearyl ether phosphate (6 moles of ethylene oxide added) and rich wt.
A mixture of 104 stearic acids containing stearic acid was ground in a ball mill for 1 hour.

Then, after diluting the slurry by adding 2G-, it was transferred to a slurry tank and filtered through a filter press. The filter press cake obtained in this way has a raw addition heat residue of 85 weight, and a mineral spirit II weight,
The sieve residue at 141μ was less than 1-.

For this filter press! Weight: Stearyl ether phosphatate (6 moles of EO added) was added, norpent naphtha was added so that the heating residue was 651 K, and the mixture was uniformly kneaded at 40"C for 30 minutes to obtain an oily steel paste.

The physical properties and coating film performance of this copper paste were investigated in the same manner as in Example 1. As a result, all properties were good and no changes were observed.

The metal powder pigment of the present invention obtained as described above has excellent water resistance, acid resistance, alkali resistance, and storage stability.9. Painting, which was previously impossible, is now possible.

Claims (1)

[Scope of Claims] t The metal powder pigment is represented by the following general formula (R in these general formulas is an alkyl group having 6 to 24 carbon atoms, an alkyl substituent having 6 to 84 carbon atoms, or an alkenyl substituent having 6 to 84 carbon atoms) represents an aryl group containing one or more groups, m represents a cyclone group with 3 #40 carbon atoms, m
is 0-10, and sand sB1 and R1 may be the same or different, hydrogen, alkyl group, alkenyl group, aryl group, or R-(OA), (where KR, m and m are the above-mentioned Metal powder pigment composition 1 characterized in that it is treated with an organophosphoric acid ester compound represented by (a turtle) represented by O) Metal content of metal powder pigment 100 weight 1
The metal powder pigment composition book according to claim 1, characterized in that L (11-20 parts by weight) is
Production of a metal powder pigment composition characterized in that a metal powder pigment is treated with an organic phosphate ester compound represented by the following general formula during the grinding of the metal powder and/or the mixing step of turning the metal powder into a paste. Method