CN113416446B

CN113416446B - Aluminum substrate white oil remover and preparation method thereof

Info

Publication number: CN113416446B
Application number: CN202110607005.0A
Authority: CN
Inventors: 石宗武; 吴春丽
Original assignee: Shenzhen Dianshiyuan Water Treatment Technology Co ltd
Current assignee: Shenzhen Dianshiyuan Water Treatment Technology Co ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2022-12-06
Anticipated expiration: 2041-06-01
Also published as: CN113416446A

Abstract

The invention discloses an aluminum substrate white oil remover and a preparation method thereof, and relates to the technical field of degreasing agents. The aluminum substrate white oil remover comprises the following components in percentage by weight: 8 to 11 percent of inorganic alkaline substance, 14 to 18 percent of organic alkali, 1.7 to 2.3 percent of surfactant, 0.9 to 1.2 percent of penetrating agent, 10 to 13 percent of corrosion inhibitor, 2 to 4 percent of chelating agent and 2 to 3 percent of dispersant; the inorganic alkaline substance comprises potassium hydroxide and sodium carbonate, and the weight ratio of the potassium hydroxide to the sodium carbonate is 6-8; the organic alkali comprises at least one of triethanolamine and diethanolamine and hydrazine hydrate, and the weight ratio of the at least one of the triethanolamine and the diethanolamine to the hydrazine hydrate is 12-15. The aluminum substrate white oil remover can remove white oil, has small corrosion to the aluminum substrate, and the cleaned aluminum substrate can be reused.

Description

Aluminum substrate white oil remover and preparation method thereof

Technical Field

The invention relates to the technical field of degreasing agents, in particular to an aluminum substrate white oil remover and a preparation method thereof.

Background

The aluminum substrate ink is ink printed on an LED aluminum substrate and mainly plays a role in solder mask protection, and the common aluminum substrate ink adopts white solder mask ink and then prints black silk-screen character ink.

The aluminum substrate is a metal copper-clad plate with better heat dissipation function compared with the traditional PCB circuit board, and a common single-sided board is composed of three layers, namely a circuit layer, an insulating layer and a metal base layer. Commonly found in LED lighting products. The aluminum alloy has a front surface and a back surface, wherein the white surface is welded, and the other surface is in the natural color of aluminum metal, and is generally coated with heat-conducting coagulation slurry and then is contacted with a heat-conducting part. The aluminum substrate used for high-end use can also be designed to be a double-sided board, and the aluminum substrate structurally comprises a circuit layer, an insulating layer, an aluminum base, an insulating layer and a circuit layer. The aluminum substrate is rarely provided with a plurality of layers of plates, and the multi-layer aluminum substrate can be formed by laminating a common single-layer plate, an insulating layer and an aluminum base.

And after the white oil printed on the aluminum substrate is cured at high temperature, the aluminum substrate enters the next procedure, the aluminum substrate with the defective rate in the next procedure is backwashed again, namely the white oil on the aluminum substrate is cleaned, and then the ink is printed again. The white oil on the aluminum substrate is particularly difficult to backwash due to high-temperature curing, and the aluminum substrate is cleaned by an alkane organic solvent and is extremely harmful, so that a medicament which is water-soluble and is not harmful is required. The backwashing of the cleaning white oil is generally carried out by compounding inorganic alkali and organic alkali, but the inorganic alkali has strong corrosivity to an aluminum base and does not meet the requirement of enterprises on the backwashing quality of the aluminum base plate. And the corrosion inhibitor used on the aluminum plate under the alkaline condition is generally sodium silicate, and when the sodium silicate is applied to the alkaline cleaning corrosion inhibitor, the addition amount is large, silicate scales are easy to separate out and adhere to the heating pipe, the heating of the heating pipe is influenced, and the heating pipe can be damaged.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the aluminum substrate white oil remover and the preparation method thereof.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an aluminum substrate white oil remover comprises the following components in percentage by weight: 8-11% of inorganic alkaline substance, 14-18% of organic alkali, 1.7-2.3% of surfactant, 0.9-1.2% of penetrating agent, 10-13% of corrosion inhibitor, 2-4% of chelating agent, 2-3% of dispersing agent and the balance of water; the inorganic alkaline substance comprises potassium hydroxide and sodium carbonate, and the weight ratio of the potassium hydroxide to the sodium carbonate is (6) - (8); the organic alkali comprises at least one of triethanolamine and diethanolamine and hydrazine hydrate, and the weight ratio of the at least one of triethanolamine and diethanolamine to the hydrazine hydrate is (12) - (15).

The traditional aluminum substrate white oil remover generally uses inorganic alkali, although the white oil can be quickly cleaned, the inorganic alkali has strong corrosivity to the aluminum substrate, and the reuse rate of the aluminum substrate is low. According to the invention, the organic alkali is used for replacing part of inorganic alkaline substances, and the components of the organic alkali are selected, so that the prepared aluminum substrate white oil remover can quickly remove white oil and cannot cause too much damage to an aluminum substrate. In addition, most of the corrosion inhibitor, the dispersant and the chelating agent have certain acidity, and when the corrosion inhibitor, the dispersant and the chelating agent are directly added into an inorganic alkaline substance, the alkali equivalent of the whole system is reduced, and the situation can be avoided by adding an organic base.

Preferably, the surfactant comprises at least one of isooctanol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether phosphate and dinaphthyl methane disulfonic acid sodium; the osmotic agent comprises dioctyl sodium sulfosuccinate; the corrosion inhibitor comprises at least one of sodium nitrate and a phosphorus-containing scale inhibitor; the chelating agent comprises at least one of citric acid, sodium gluconate and sulfamic acid; the dispersing agent comprises at least one of polyacrylic acid and polymaleic acid, the relative molecular weight of the polyacrylic acid is less than 10000, and the relative molecular weight of the polymaleic acid is less than or equal to 2000.

Isooctanol polyoxyethylene ether phosphate ester has good wettability and solubility, can reduce surface tension and improve suspension capacity; the alkylphenol polyoxyethylene ether phosphate is a nonionic surfactant, has good acid and alkali resistance and stable property; dinaphthylmethane disulfonic acid sodium is an anionic surfactant, has good acid and alkali resistance, and can be used as a stabilizer. The applicant selects the components of the surfactant, so that the prepared white oil remover has uniform components and good stability. The sodium dioctyl sulfosuccinate has good wetting, penetrating, emulsifying and foaming properties, and can penetrate quickly and uniformly. Polyacrylic acid is a scale inhibition and dispersion agent, and has a synergistic effect when compounded with a corrosion inhibitor; the polymaleic acid has good effects of inhibiting scale formation and stripping old scales. The applicant of the present invention selects the components, so that the prepared white oil remover has good stability and can be stored for a long time, and the aluminum substrate using the aluminum substrate white oil remover can be put into use again.

Preferably, the corrosion inhibitor comprises sodium nitrate and a phosphorus-containing scale inhibitor, and the weight ratio of the sodium nitrate to the phosphorus-containing scale inhibitor is 5 to 5; the phosphorus-containing scale inhibitor comprises at least one of aminotrimethylene phosphonic acid, ethylenediamine tetramethylene phosphonic acid, hexamethylenediamine tetramethylene phosphonic acid, diethylenetriamine pentamethylene phosphonic acid, 2-phosphonic acid-1, 2, 4-butane tricarboxylate. The applicant of the invention proves through experiments that compared with the method of singly using sodium nitrate or singly using a phosphorus-containing scale inhibitor, the method of compounding the sodium nitrate and the phosphorus-containing scale inhibitor according to the proportion can maintain the surface of the cleaned aluminum substrate in a smooth state and has the minimum attack on the aluminum substrate.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the components of the aluminum substrate white oil remover and the proportion of the components are selected, so that the prepared white oil remover can quickly remove the white oil on the aluminum substrate; in addition, the aluminum substrate white oil remover has small attack on the aluminum substrate, and the treated aluminum substrate can be reused.

Drawings

FIG. 1 is a pictorial view of the front side of an aluminum plate covered with white oil and a copper circuit layer;

FIG. 2 is a schematic view of the back surface of the aluminum substrate treated with the white oil remover for aluminum substrates in example 1;

FIG. 3 is a schematic view of the back surface of the aluminum substrate treated with the white oil remover for aluminum substrates of example 4;

FIG. 4 is a schematic view of the back surface of the aluminum substrate treated with the white oil remover for aluminum substrates in example 5;

FIG. 5 is a schematic view of the back surface of the aluminum substrate treated with the white oil remover for aluminum substrates in example 6;

FIG. 6 is a physical representation of the back surface of an aluminum substrate treated with the aluminum substrate white oil remover of comparative example 1;

FIG. 7 is a 50-fold micrograph of the back of an aluminum plate covered with a white oil and copper circuit layer;

FIG. 8 is a 50-fold micrograph of the backside of an aluminum substrate treated with the aluminum substrate white oil remover of example 1;

FIG. 9 is a 50-fold micrograph of the backside of an aluminum substrate treated with the white oil remover of the aluminum substrate of example 2;

FIG. 10 is a 50-fold micrograph of the backside of an aluminum substrate treated with the aluminum substrate white oil remover of example 3;

FIG. 11 is a 50-fold micrograph of the backside of an aluminum substrate treated with the aluminum substrate white oil remover of example 4;

FIG. 12 is a 50-fold micrograph of the backside of an aluminum substrate treated with the white oil remover of the aluminum substrate of example 5;

FIG. 13 is a micrograph of the backside of an aluminum substrate treated with the white oil remover of the aluminum substrate of example 6 taken at 50 times;

FIG. 14 is a 50-fold micrograph of the backside of an aluminum substrate treated with the aluminum substrate white oil remover of comparative example 1.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and specific embodiments.

Examples 1 to 6

The formulations of the aluminum substrate white oil remover in the embodiments of the invention, examples 1 to 6 are shown in table 1. The components listed in the table 1 are uniformly mixed to obtain the corresponding aluminum substrate white oil remover.

Comparative example 1

An aluminum substrate white oil remover has a formula shown in Table 1, and the preparation method is the same as in examples 1 to 6.

TABLE 1 weight percent (%)

The aluminum substrate white oil removers prepared in examples 1 to 6 and comparative example 1 were tested for their performance, and the test methods were as follows:

7 identical aluminum plates covered with the white oil and the copper circuit layer were respectively soaked in the aluminum substrate white oil remover described in examples 1 to 6 and comparative example 1, heated in a water bath to 70 ℃, and the time for removing the white oil and the copper circuit layer was recorded in table 2.

TABLE 2

Item	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Comparative example 1
								Time/min	24	23	24	27	27	29	53

As can be seen from Table 2, the speed of removing the white oil and the copper circuit layer by the aluminum substrate white oil remover in the examples 1 to 6 is obviously faster than that in the comparative example 1.

FIG. 1 is a real diagram of an aluminum substrate covered with white oil and a copper circuit layer to be treated, FIGS. 2 to 6 are real diagrams of the back surface of the aluminum substrate treated by the aluminum substrate white oil remover described in examples 1, 4, 5 and 6 and comparative example 1, respectively, and as can be seen from FIG. 2, the back surface of the aluminum substrate treated by the aluminum substrate white oil remover described in example 1 is very smooth and hardly corroded. The back of the aluminum substrate treated by the aluminum substrate white oil remover in the embodiments 2 to 3 is also similar to that in the embodiment 1, and the description is omitted here. As can be seen from FIGS. 3 to 5, the aluminum substrates treated with the aluminum substrate grease removers in examples 4 to 6 showed a small amount of traces of corrosion on the rear surfaces thereof. As can be seen from FIG. 6, the aluminum substrate treated with the white oil remover for aluminum substrate described in comparative example 1 showed very severe corrosion on the backside.

Figure 7 is a 50-fold micrograph of the back of an aluminum plate covered with white oil and copper circuit layers. FIGS. 8 to 14 are micrographs of the back surfaces of the aluminum substrates treated in examples 1 to 6 and comparative example 1, which are 50 times, respectively, and as can be seen from FIGS. 8 to 10, the shapes of the micrographs of the back surfaces of the aluminum substrates treated in examples 1 to 3 are similar to those of example 7, and the aluminum substrates are not attacked by the aluminum substrate white oil remover; as can be seen from FIGS. 11 to 13, the aluminum substrates treated in examples 4 to 6 have a phenomenon that the backside is slightly attacked by the aluminum substrate white oil remover; as can be seen from fig. 14, the aluminum substrate backside treated in comparative example 1 was severely attacked.

The test results show that the components of the aluminum substrate white oil remover and the proportion of the components are selected, so that the prepared aluminum substrate white oil remover can quickly remove white oil, and can ensure that the aluminum substrate is slightly corroded and can be reused.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The aluminum substrate white oil remover is characterized by comprising the following components in percentage by weight: 8-11% of inorganic alkaline substance, 14-18% of organic alkali, 1.7-2.3% of surfactant, 0.9-1.2% of penetrating agent, 10-13% of corrosion inhibitor, 2-4% of chelating agent, 2-3% of dispersing agent and the balance of water; the inorganic alkaline substance comprises potassium hydroxide and sodium carbonate, and the weight ratio of the potassium hydroxide to the sodium carbonate is (6) - (8); the organic base comprises at least one of triethanolamine and diethanolamine and hydrazine hydrate, the weight ratio of the at least one of the triethanolamine and the diethanolamine to the hydrazine hydrate is 12 to 15 to 2 to 3, the corrosion inhibitor comprises sodium nitrate and a phosphorus-containing scale inhibitor, and the weight ratio of the sodium nitrate to the phosphorus-containing scale inhibitor is 5 to 5.

2. The aluminum substrate white oil remover according to claim 1, wherein the surfactant comprises at least one of isooctanol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether phosphate, dinaphthylmethane disulfonic acid sodium; the osmotic agent comprises dioctyl sodium sulfosuccinate; the chelating agent comprises at least one of citric acid, sodium gluconate and sulfamic acid; the dispersing agent comprises at least one of polyacrylic acid and polymaleic acid, the relative molecular mass of the polyacrylic acid is less than 10000, and the relative molecular mass of the polymaleic acid is less than or equal to 2000.

3. The preparation method of the aluminum substrate white oil remover according to any one of claims 1 to 2, characterized by comprising the following steps: weighing the raw materials according to the proportion, and uniformly mixing to obtain the aluminum substrate white oil remover.