KR101670416B1

KR101670416B1 - Method of continuously manufacturing nonleafing aluminum paste

Info

Publication number: KR101670416B1
Application number: KR1020160057700A
Authority: KR
Inventors: 박태호; 최성옥; 최용환
Original assignee: 주식회사 태명알텍
Priority date: 2016-05-11
Filing date: 2016-05-11
Publication date: 2016-10-28

Abstract

One aspect of the disclosure provides a method of making an aluminum slurry comprising aluminum powder, oleic acid, mineral spirit, naphtha, and silicone oil; A first milling step of continuously grinding the aluminum slurry by a horizontal mill method to form a preliminary aluminum paste; And a second milling step of continuously grinding the preliminary aluminum paste by a horizontal milling method while feeding alumina and an acrylic resin into the preliminary aluminum paste.

Description

METHOD OF CONTINUOUSLY MANUFACTURING NONLEAFING ALUMINUM PASTE [0001]

The present disclosure relates to a continuous method of making a logic-zipping aluminum paste.

The aluminum paste that imparts a metallic feel to the coating may include aluminum flakes, solvents, and lubricants. Aluminum paste is generally divided into a leafing type and a non-leafing type.

The ripping type is characterized in that the aluminum flakes float on the surface of the film during coating due to the large interfacial tension between the aluminum flake and the solvent to form leafing. Therefore, the aluminum flakes act as a barrier against the penetration of oxygen and water vapor, and the ripping aluminum paste is mainly used for corrosion prevention of the steel structure.

The logic ping type prevents the aluminum flakes from floating on the surface of the coating upon application due to the relatively low interfacial tension between the aluminum flake and the solvent. The dielectric-fastening aluminum paste is dispersed in a substantially uniformly oriented state in the coating film to give a metallic feel to the coating film. In addition, since the limitations on usable solvents, resins, and desiccants are not so strict as compared with the ripping aluminum paste, various color pigments can be added to exhibit various colors. For this reason, the logic-pinging aluminum paste is increasingly used in the automotive industry.

The metal feel of the coating film is visually recognized by a combination of brightness, brightness, brightness, etc., but generally a high brightness is mainly required. Generally, the brightness of the coating film and the average particle diameter of the aluminum paste are related to each other, and the luminance increases as the average particle diameter increases.

However, when the average particle diameter of the aluminum paste becomes excessively large, the alignment of the aluminum paste becomes uneven at the time of forming a coating film, and there is a problem that the aluminum paste is projected from the coating film to form a droplet on the surface of the coating film.

In addition, in the conventional method for manufacturing an automotive aluminum paste, a gas-injected spherical powder and an organic solvent are charged into a container, followed by ball milling to obtain an intermediate paste containing a plate-like aluminum powder, Or controlling the amount of solvent after filtering. The ball milling method adopts the principle that the ball for crushing and the aluminum powder are charged into the cylindrical tank at an appropriate ratio and the aluminum powder is crushed by the falling impact of the ball as the cylindrical tank is diffracted. The ball milling method requires a melting furnace, a high-pressure gas injection system, a large-sized chamber and a seiving system, consumes a large amount of power during the melting of aluminum, takes a long time to obtain a desired average particle diameter have.

Therefore, there is a need for a production method capable of efficiently obtaining an aluminum paste having an appropriate average particle diameter in order to have a coating having a high luminance and a high gloss.

As a result of intensive investigation into the above problems, the present inventors have found that, when an aliphatic solvent and special additives are mixed in a specific ratio to the aluminum powder and the resulting mixture is ground by the horizontal milling method, And the present disclosure has been completed on the basis of this finding.

Accordingly, one aspect of the present disclosure is to provide a continuous method of manufacturing a logic-zing aluminum paste.

A method for continuous production of a logic-zing aluminum paste according to one embodiment of the present disclosure for achieving the above-described aspects comprises:

Providing an aluminum slurry comprising aluminum powder, oleic acid, mineral spirit, naphtha, and silicone oil;

A first milling step of continuously grinding the aluminum slurry by a horizontal mill method to form a preliminary aluminum paste; And

And a second grinding step in which the preliminary aluminum paste is continuously polished by a horizontal mill method while feeding alumina and an acrylic resin into the preliminary aluminum paste.

According to an exemplary embodiment, the logic-finishing aluminum paste comprises 100 parts by weight of aluminum powder, 2 to 4 parts by weight of oleic acid, 250-300 parts by weight of mineral spirits, 50-75 parts by weight of naphtha, 0.1-2 parts by weight of silicone oil, 0.1 To 2 parts by weight of alumina, and 1 to 5 parts by weight of an acrylic resin.

According to an exemplary embodiment, the step of providing the aluminum slurry may be performed at a speed of 200 to 250 rpm for 20 to 30 minutes to stabilize the aluminum slurry.

According to an exemplary embodiment, the first milling step may be performed at 1000-1500 rpm for 1 hour to 2 hours.

According to an exemplary embodiment, the second milling step may be performed at 300 to 600 rpm for 3 to 6 hours.

According to an exemplary embodiment, the horizontal mill method may be a dynomir method.

The continuous method of manufacturing a logic-pinging aluminum paste according to one embodiment of the present disclosure is characterized in that the logic-pinging aluminum paste having the same or superior quality as the conventional batch- 5-fold increase in production can be produced.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of a flow of a continuous method of manufacturing a logic-zing aluminum paste according to one embodiment of the present disclosure;
2 is a diagram illustrating the internal structure of a horizontal mill according to one embodiment of the present disclosure;

Before describing this disclosure in more detail, it is to be understood that the phraseology or words used in the present specification and claims should not be construed in a conventional or dictionary sense, Should be construed in light of the meaning and concept consistent with the technical idea of the present disclosure, on the basis that it can be properly defined. Therefore, the constitution of the embodiment described in the present specification is merely a preferred example of the present disclosure, and not all of the technical ideas of the present disclosure are described. Therefore, various equivalents and variations And the like.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present disclosure will be described in detail so that those skilled in the art can easily carry out the present disclosure. Moreover, in the description of the present disclosure, a detailed description of related art which may unnecessarily obscure the gist of the present disclosure is omitted.

A method of continuous manufacture of a logic-zing aluminum paste according to one embodiment of the present disclosure comprises the steps of: providing an aluminum slurry comprising aluminum powder, oleic acid, mineral spirit, naphtha, and silicone oil; A first milling step of continuously grinding the aluminum slurry by a horizontal mill method to form a preliminary aluminum paste; And a second milling step of continuously grinding the preliminary aluminum paste by a horizontal mill method while feeding alumina and an acrylic resin into the preliminary aluminum paste.

As used in this disclosure, the term " horizontal milling "means a grinding method in which a sample is introduced into one end of a horizontal type milling chamber to be polished along the longitudinal direction of the milling chamber and then discharged to the opposite end. In one embodiment, the horizontal mill method may be a milling method using a dyno mill, but is not limited thereto.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of a flow of a continuous method of manufacturing a logic-zing aluminum paste in accordance with one embodiment of the present disclosure; Referring to FIG. 1, aluminum powder, oleic acid, mineral spirits, naphtha, and silicone oil may be charged into a mixing vessel and stirred to provide an aluminum slurry. The aluminum slurry may be introduced into the first dynomix and first milled to form a preliminary aluminum paste. The preliminary aluminum paste may be introduced into the second dynomill while the alumina and the acrylic resin are fed, and the second polish may be carried out to continuously produce the logic-zing aluminum paste.

The first grinding step is a step of increasing the size of the aluminum particles by 2 to 4 times, preferably about 2.5 times, and the second grinding step is a step of making the stretched aluminum particles into a smooth curved shape.

In one embodiment of the present disclosure, the logic-finishing aluminum paste comprises 100 parts by weight of aluminum powder, 2-4 parts by weight of oleic acid, 250-300 parts by weight of mineral spirits, 50-75 parts by weight of naphtha, 0.1-2 parts by weight of silicone oil , 0.1 to 2 parts by weight of alumina, and 1 to 5 parts by weight of an acrylic resin.

The weight used in this disclosure means the weight ratio. For example, the mixing of 2 parts by weight of B with respect to 1 part by weight of A means that further mixing of components other than A and B also maintains a 1: 2 weight ratio of A: B in the mixture.

In the manufacturing method of the present disclosure, the aluminum powder to be the raw material of the aluminum paste is not particularly limited, and may be composed of aluminum alone or may be composed of aluminum alloy, and the purity of aluminum is not particularly limited. In order to increase the gloss of the coating film and the printed material, it is usually preferable to use pure aluminum, and more preferably to pure aluminum of 99.9 mass% or more in purity.

The amount of oxygen contained in the aluminum powder varies depending on the particle size or shape of the raw aluminum powder, and is not particularly limited, but is preferably 0.5% by mass or less. When the oxygen content is more than 0.5% by mass, the oxide film becomes strong, and it tends to be difficult to produce thin flakes due to the lowering of the ductility.

The aluminum powder used in the production method of the present disclosure may be any one obtained by any production method, but it is preferably an atomized aluminum powder which is easy to obtain or cost-wise.

The atomized aluminum powder is a raw aluminum powder obtained by a conventionally known atomization method. The spraying agent is not particularly limited, and examples thereof include air, nitrogen, argon gas, carbon dioxide gas, helium gas, A mixed gas containing at least one species, or the like can be used. In addition, a liquid such as water may be used as a spraying agent. Among them, the raw material aluminum powder obtained by the atomization method using argon gas or nitrogen gas as a spraying agent has a shape close to the spherical shape, and the roundness of aluminum flakes obtained using the aluminum powder becomes easy to obtain Particularly suitable.

The shape of the aluminum powder used in the manufacturing method of the present disclosure is not particularly limited and may be, for example, spherical, flat, plate, teardrop, needle, spheroid, irregular, The closer to the spherical shape is, the more desirable it is because the roundness is increased and the aluminum flake with high luminance is easily obtained.

The average particle diameter of the raw aluminum powder used in the manufacturing method of the present disclosure is not particularly limited, but is preferably 1.0 占 퐉 to 50.0 占 퐉, more preferably 3 占 퐉 to 40.0 占 퐉, and most preferably 5 占 퐉 to 20.0 占 퐉 Range. In the present disclosure, the average particle size (D50) can be determined by calculating the volume average from the particle size distribution measured by the laser diffraction method.

If the D50 _Al exceeds 50.0 占 퐉, the average particle diameter of the aluminum flakes after flaking becomes large, so that the orientation of the aluminum flakes may be disturbed at the time of forming the coating film containing the aluminum paste, There is a case in which a projecting shape is seen or the shining of the coating film is too strong, which is not preferable in design depending on the use. On the other hand, when the D50 _Al is less than 1.0 ㎛, especially when the diameter of using small grinding media (for example, when flakes screen using a grinding media in the range of 0.3 ~ 1.0 ㎜), the effective ingredients The aluminum powder can not be flaky and a sufficient film film brightness tends not to be obtained

When the aluminum powder is ground to produce aluminum flakes, a lubricant is added to prevent thermal adhesion between the aluminum particles. Fatty acids such as stearic acid and oleic acid as lubricants are attached to the aluminum flake surface in the course of grinding to give parallel alignment of the aluminum flakes, inhibit aggregation, and protect the aluminum surface.

The ripping property or the logic fingering property of the aluminum paste is determined according to the characteristics of the lubricant added at the time of milling. Using saturated fatty acids such as stearic acid, it is known to produce ripping aluminum paste, and using unsaturated fatty acids such as oleic acid to make a logic-ping aluminum paste.

In the present disclosure, oleic acid is used as a lubricant to produce a logic-zing aluminum paste. In consideration of continuous grinding using Dynomill, the oleic acid may be added in an amount of 2 to 4 parts by weight, more preferably 2.5 to 3.5 parts by weight based on 100 parts by weight of the aluminum powder. When the amount of the oleic acid added is less than 2 parts by weight, the lubricity is insufficient and the flaking of the aluminum flakes occurs, and the logic flipping property may not be exhibited. If the addition amount of the oleic acid exceeds 4 parts by weight, the physical properties of the coating material, in particular, the adhesiveness thereof are lowered, and the aluminum powder becomes difficult to flake and the polishing time can be prolonged.

Solvents added during grinding serve to dissolve the lubricant and lower the viscosity to increase the grinding efficiency. It also serves to control the viscosity of the paint during application. The solvent in this disclosure uses aliphatic hydrocarbons, for example, a combination of mineral spirits and naphthas.

The mineral spirit is used in an amount of 250 to 300 parts by weight, more preferably 260 to 290 parts by weight, most preferably 270 to 280 parts by weight based on 100 parts by weight of the aluminum powder. If the amount of the mineral spirit is less than 250 parts by weight, the surface of the aluminum becomes uneven, the surface becomes rough, the particles become uneven, and metallic feeling can not be exhibited. When the amount of the mineral spirit is more than 300 parts by weight, oleic acid, which is a lubricant, is excessively dissolved to reduce the amount of fatty acid adhering to the aluminum surface, thereby causing agglomeration of the aluminum flakes with time, Can be degraded.

The naphtha in the present disclosure may include, but is not limited to, hydrocarbon-based solvents such as Solvent 5. Naphtha is added to make the ends of the aluminum flakes smooth in the grinding process. The amount of the naphtha added is 50 to 75 parts by weight, more preferably 55 to 70 parts by weight, based on 100 parts by weight of the aluminum powder. When the addition amount of the naphtha is less than 50 parts by weight, the aluminum luminance is lowered. When the addition amount is more than 75 parts by weight, it is difficult to obtain a constant aluminum shape.

In the grinding process using dynomethyl, silicone oil can be added to reduce heat generation, shorten the milling time, and produce uniform aluminum flake particles. The silicone oil is added in an amount of 0.1 to 2 parts by weight, preferably 0.5 to 1 part by weight, based on 100 parts by weight of the aluminum powder. When the addition amount of the silicone oil is less than 0.1 part by weight, the aluminum dispersibility is poor and it is difficult to obtain a uniform shape. When the amount is more than 2 parts by weight, compatibility and adhesion with the paint may be poor.

Aluminum powder, oleic acid, mineral spirit, naphtha, and silicone oil are put into a mixing vessel and stirred to produce an aluminum slurry. The agitation speed is 20 to 60 minutes, more preferably 30 to 50 minutes at a speed of 200 to 250 rpm, preferably 220 to 230 rpm.

If the stirring time is less than 20 minutes, the aluminum slurry becomes non-uniform, while if it exceeds 60 minutes, the effect of increasing the uniformity is insignificant. If the stirring speed is less than 200 rpm, the slurry stabilization time is increased, and the aluminum slurry may become non-uniform. If the agitation speed is more than 250 rpm, it may affect the brightness by scraping the end portion of the aluminum particle.

&Lt; First polishing step &

In one embodiment of the present disclosure, the aluminum slurry is ground by horizontal milling to flake the raw aluminum powder in the aluminum slurry. Here, "flaking" means that the particulate powder is formed into flakes (scaly) by using a crusher or the like. The horizontal milling method used in the present disclosure is not a batch type such as a conventional ball mill or ring mill, but a horizontal type and a continuous type, and may be a method of grinding using, for example, a dyno mill.

The Dyno-Mill method is a principle in which a zirconium bead is charged together with a sample, and then an aluminum slurry containing aluminum powder is passed through a horizontally installed stirrer to flake the aluminum powder in a short time, thereby uniformly grinding the entire aluminum slurry. Therefore, there is an effect that the brightness of the resultant preliminary aluminum paste is uniform and the particle size deviation of the preliminary aluminum paste is not large.

In one embodiment of the present disclosure, the dynomix may be a Twin Dyno mill with two chambers, the chamber may have a length of 300 mm and a width of 100 mm, and a screw capable of high- Preferably 7, and may include zirconium round balls having a diameter of 0.1 to 5 mm, more preferably 1 to 2 mm as the grinding media. Inside the chamber a zirconium ball can be charged in an amount of preferably 20 to 50 kg, more preferably 30 to 40 kg.

At the time of grinding, the rotation speed of the screw may be adjusted to 1000 to 1500 rpm, more preferably 1100 to 1400 rpm, and most preferably 1200 to 1300 rpm. If the rotation speed is less than 1000 rpm, the aluminum particles become small. If the rotation speed is more than 1500 rpm, the aluminum particles may be damaged and the metallic feeling may be lost.

The first polish step for producing the preliminary aluminum paste may be carried out for 1 hour to 2 hours, more preferably for 1 hour to 1 hour and 30 minutes. When the coating time is less than one hour, the aluminum flakes do not uniformly cover the surface of the coating film when the coating including the aluminum flakes is applied, The average particle diameter of the flakes becomes very small, so that the coating film containing aluminum flakes has a seeding phenomenon upon drying of the coating film, resulting in the formation of a non-uniform coating film surface. The preliminary aluminum paste after the first milling step can be stored in a storage container.

Thus, when the aluminum flakes are crushed using a dynomiller as compared to a ball mill or a ring mill, there is an advantage that the time for crushing the aluminum flakes to a desired size is further shortened and the cost of the crushing is reduced.

&Lt; Second polishing step &

In order to increase the brightness and metallic feeling of the preliminary aluminum paste and to form the edge portion of the aluminum flake into a smooth curve, alumina is further added to the preliminary aluminum paste stored in the storage container, and the aluminum paste is polished using a dyno mill to prepare an aluminum paste . The amount of alumina to be added may be 0.1 to 2 parts by weight, more preferably 0.5 to 1 part by weight, based on 100 parts by weight of the raw material aluminum powder. If the added amount of alumina is less than 0.1 part by weight, the polish-up time is increased and the surface of the aluminum particles becomes uneven. If the amount is more than 2 parts by weight, the aluminum surface may become hazy.

The second milling step for producing the aluminum paste is preferably carried out at a rotational speed of 300 to 600 rpm, more preferably 400 to 500 rpm, preferably 3 to 6 hours, more preferably 4 to 5 hours Lt; / RTI >

If the rotational speed in the second milling step is less than 300 rpm, the grinding time is increased. If the rotational speed is more than 600 rpm, the luminance may be lowered. If the grinding time is less than 3 hours, the luminance is lowered. If the grinding time is longer than 6 hours, the metallic feeling may be lowered.

The addition of acrylic resin or silica may be carried out to protect the aluminum flakes. The amount of the acrylic resin or silica to be added may be 1 to 5 parts by weight, more preferably 2 to 4 parts by weight, based on 100 parts by weight of the raw material aluminum powder. If the amount is less than 1 part by weight, it is difficult to sufficiently cover the aluminum. If the amount is more than 5 parts by weight, the aluminum particles may be excessively wrapped and the surface may be worn out and the metal feeling may drop significantly.

According to one embodiment of the present disclosure, aluminum paste can be continuously produced at a rate of 200 kg / hr. This corresponds to 4 to 5 times the amount produced by the ball mill or ring mill.

Hereinafter, the present disclosure will be described in more detail by way of examples, but the following examples do not limit the scope of the present disclosure.

Example 1

Step of providing aluminum slurry

40 kg of raw aluminum powder having an average particle size of 7.5 mu m, 100 kg of mineral spirits, 20 kg of naphtha, 0.8 kg of oleic acid and 40 g of silicone oil were put into a mixing vessel having a diameter of 500 mm and a length of 1800 mm, For about 20 minutes to obtain an aluminum slurry in which the respective components were dispersed.

First polishing step

The resulting aluminum slurry was introduced into the first dynomill from a mixing vessel through a conduit. The first dynomix has two chambers, each of which has a length of 300 mm and a width of 100 mm, and has seven screws capable of high-speed rotation. Each chamber was filled with 40 kg of zirconium round balls having a diameter of 1 mm as a grinding medium. A preliminary aluminum paste was prepared by passing the aluminum slurry through the chamber three times at a speed of about 1200 rpm for 1 hour. The prepared preliminary aluminum paste was stored in a storage container through a conduit.

Second polishing step

The preliminary aluminum paste was introduced through a conduit into a second dyno mill having the same specifications as the dyno mill of the first crushing stage, and simultaneously 40 g of alumina and 400 g of acrylic resin were dropped into the preliminary aluminum paste to be introduced at a rate of 3 rpm, For 10 minutes to prepare a logic-pinging aluminum paste.

Example 2

An aluminum paste was prepared in the same manner as in Example 1, except that the first grinding step was carried out for 2 hours.

Example 3

An aluminum paste was prepared in the same manner as in Example 1 except that the second grinding step was carried out for 6 hours.

Comparative Example 1

An aluminum paste was prepared in the same manner as in Example 1, except that the first milling step was carried out for 40 minutes.

Comparative Example 2

An aluminum paste was prepared in the same manner as in Example 1, except that the first grinding step was conducted for 2 hours and 30 minutes.

Comparative Example 3

An aluminum paste was prepared in the same manner as in Example 1 except that the second grinding step was conducted for 2 hours and 30 minutes.

Comparative Example 4

An aluminum paste was prepared in the same manner as in Example 1 except that the second grinding step was conducted for 6 hours and 30 minutes.

Comparative Example 5

An aluminum paste was prepared in the same manner as in Example 1 except that the mineral spirit was added at 80 kg.

Comparative Example 6

An aluminum paste was prepared in the same manner as in Example 1, except that the mineral spirit was added at 160 kg.

Comparative Example 7

An aluminum paste was prepared in the same manner as in Example 1 except that naphtha was added at 16 kg.

Comparative Example 8

An aluminum paste was prepared in the same manner as in Example 1, except that naphtha was added at 32 kg.

Comparative Example 9

An aluminum paste was prepared in the same manner as in Example 1, except that 400 g of oleic acid was added.

Comparative Example 10

Aluminum paste was prepared in the same manner as in Example 1, except that oleic acid was added at 2 kg.

Comparative Example 11

An aluminum paste was prepared in the same manner as in Example 1 except that silicone oil was added in an amount of 20 g.

Comparative Example 12

An aluminum paste was prepared in the same manner as in Example 1 except that silicone oil was added in an amount of 2 kg.

Comparative Example 13

An aluminum paste was prepared in the same manner as in Example 1 except that 20 g of alumina was added.

Comparative Example 14

An aluminum paste was prepared in the same manner as in Example 1 except that alumina was added in an amount of 2 kg.

Comparative Example 15

An aluminum paste was prepared in the same manner as in Example 1, except that 200 g of the acrylic resin was added.

Comparative Example 16

An aluminum paste was prepared in the same manner as in Example 1, except that 10 kg of acrylic resin was added.

Experimental Example 1

The sieve residue of the aluminum paste according to Examples 1 to 3 and Comparative Examples 1 to 16 was measured, and the results are shown in Table 1. Here, the sieve powder is obtained by measuring the ratio of the residual weight to the initial weight by filtering the aluminum paste produced in a body having a plurality of holes of a specific size. Therefore, the large amount of selenium powder means that the size of the flake particle in the produced alumina paste is not uniform, and a lot of particles larger than the sieve hole are produced. In the present disclosure, body residues were measured using a hole having a size of 28 mu m.

Experimental Example 2

100 g of acrylic resin and 40 g of acrylobesulfone were mixed and stirred in 10 g of the aluminum paste according to Examples 1 to 3 and Comparative Examples 1 to 16, and the mixture was stirred with a spray gun of Sata HVLP Nozzle 1.3 to prepare a 2 And then dried to form a coating film having a thickness of 30 탆, and then the appearance was observed. The hiding power was measured with an applicator by film thickness. The luminance was measured in gloss. The measurement results are shown in Table 1.

Psalter Concealed (㎛) gloss Sieve residue D50 _Al Exterior Example 1 60 93 28.3 Good Example 2 60 90 29.8 Good Example 3 60 92 28.3 Good Comparative Example 1 90 80 24 Metal feeling is off Comparative Example 2 60 88 35 Seeding occurs Comparative Example 3 90 82 34.5 Seeding occurs Comparative Example 4 60 93 28.4 Good Comparative Example 5 60 88 28 Fine Seeding Occurred Comparative Example 6 120 89 28.4 Good Comparative Example 7 40 82 29.5 Seeding occurs Comparative Example 8 90 92 28.4 Good Comparative Example 9 60 77 32 No metal feeling Comparative Example 10 60 82 28.4 Surface haze Comparative Example 11 60 88 29.5 Fine Seeding Occurred Comparative Example 12 60 90 29.4 Bad adhesion Comparative Example 13 60 88 30.5 Rough surface Comparative Example 14 40 88 29 Metal decline Comparative Example 15 60 87 29.5 Good Comparative Example 16 90 89 30 Decrease of solid content

Although the present disclosure has been described in detail with reference to specific embodiments thereof, it should be understood that the present disclosure is not intended to be limited thereto and that various changes and modifications may be made by those skilled in the art, It is obvious that it can be modified or improved.

All such modifications and variations are intended to fall within the scope of this disclosure, and the specific scope of protection of this disclosure will be apparent from the claims that follow.

Claims

A continuous method of manufacturing a logic-zing aluminum paste,
Providing an aluminum slurry comprising aluminum powder, oleic acid, mineral spirit, naphtha, and silicone oil;
A first milling step of continuously grinding the aluminum slurry by a horizontal mill method to form a preliminary aluminum paste; And
And a second milling step of continuously grinding the preliminary aluminum paste by a horizontal mill method while feeding alumina and an acrylic resin into the preliminary aluminum paste,
The logic-pinging aluminum paste comprises 100 parts by weight of aluminum powder, 2 to 4 parts by weight of oleic acid, 250 to 300 parts by weight of mineral spirits, 50 to 75 parts by weight of naphtha, 0.1 to 2 parts by weight of silicone oil, 0.1 to 2 parts by weight of alumina, 1 to 5 parts by weight of an acrylic resin.

delete

The method according to claim 1,
Wherein the step of providing the aluminum slurry is performed at a speed of 200 to 250 rpm for 20 to 30 minutes to stabilize the aluminum slurry.

The method according to claim 1,
Wherein the first milling step is performed at 1000 to 1500 rpm for 1 hour to 2 hours.

The method according to claim 1,
Wherein the second polishing step is performed at 300 to 600 rpm for 3 to 6 hours.

The method according to any one of claims 1 to 3,
The horizontal milling method is a continuous milling method of a logic annealing aluminum paste