阅读说明：本技术 一种剥膜液及其制备方法 (Stripping liquid and preparation method thereof ) 是由 张本汉 许永章 喻荣祥 钟炜 钟国锋 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种剥膜液及其制备方法,剥膜液组分按重量比例包括复合碱30％-45％、表面活性剂20％-30％、缓蚀剂5％-9％,其余为水,本发明制备方法简单,制得的剥膜液环保性能好,能够提高剥膜处理的效果,且能极大地节水减排,此外能够有效保护金属在剥膜过程中不受攻击。(The invention discloses a stripping liquid and a preparation method thereof, wherein the stripping liquid comprises 30-45% of composite alkali, 20-30% of surfactant, 5-9% of corrosion inhibitor and the balance of water by weight ratio.)

1. The film stripping liquid is characterized in that: the film stripping liquid comprises, by weight, 30-45% of composite alkali, 20-30% of a surfactant, 5-9% of a corrosion inhibitor and the balance of water.

2. The stripping solution according to claim 1, characterized in that: the film stripping liquid comprises 40% of composite alkali, 25% of surfactant, 8% of corrosion inhibitor and the balance of water according to the weight proportion.

3. The stripping solution according to claim 1, characterized in that: the surfactant component comprises, by weight, 3-8 parts of alkyl dimethyl amine oxide, 2-6 parts of sodium dodecyl sulfate, 4-8 parts of alpha-olefin sodium sulfonate, 1-3 parts of an alcohol ether penetrant and 2-6 parts of alkanolamide.

4. The stripping solution according to claim 1, characterized in that: the corrosion inhibitor consists of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol and 20% of benzaldehyde.

5. The preparation method for realizing the stripping liquid of claim 1 is characterized by comprising the following steps: the preparation method comprises the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

6. The preparation method of the stripping liquid according to claim 5, characterized in that: the stirring speed in the step A is 100-200 r/min, and the time is 20-40 min.

7. The preparation method of the stripping liquid according to claim 5, characterized in that: the heating temperature in the step A is 55-65 ℃.

8. The preparation method of the stripping liquid according to claim 5, characterized in that: the stirring speed in the step B is 400-800 rpm, and the time is 50-60 min.

9. The preparation method of the stripping liquid according to claim 5, characterized in that: and the standing time in the step C is 20-24 h.

Technical Field

The invention relates to the technical field of preparation of membrane stripping liquid, in particular to a membrane stripping liquid and a preparation method thereof.

Background

With the development of the electronic industry toward high speed and miniaturization, the requirement for the packing density is higher and higher. The pattern transfer process is an important part of the production of printed circuit boards. However, the traditional stripping solution and organic stripping solution prepared by sodium hydroxide cannot meet the requirement of stripping ultra-fine lines in the circuit board industry, the traditional stripping solution cannot crush extremely narrow dry films required for micronization, and dry film residue is easy to generate, namely the film clamping phenomenon is known as 'film clamping', the film clamping causes the problems of short circuit and the like of products, the yield is reduced, even scrapped, and the production cost is increased.

Disclosure of Invention

The invention aims to provide a stripping liquid and a preparation method thereof, which aim to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the stripping liquid comprises, by weight, 30-45% of a composite alkali, 20-30% of a surfactant, 5-9% of a corrosion inhibitor, and the balance water.

Preferably, the stripping liquid comprises 40% of composite alkali, 25% of surfactant, 8% of corrosion inhibitor and the balance of water according to the weight proportion.

Preferably, the surfactant component comprises 3-8 parts by weight of alkyl dimethyl amine oxide, 2-6 parts by weight of sodium dodecyl sulfate, 4-8 parts by weight of alpha-olefin sodium sulfonate, 1-3 parts by weight of alcohol ether penetrant and 2-6 parts by weight of alkanolamide.

Preferably, the corrosion inhibitor consists of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol and 20% of benzaldehyde.

Preferably, the preparation method comprises the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

Preferably, the stirring speed in the step A is 100-200 rpm, and the time is 20-40 min.

Preferably, the heating temperature in the step A is 55-65 ℃.

Preferably, the stirring speed in the step B is 400-800 rpm, and the time is 50-60 min.

Preferably, the standing time in the step C is 20-24 h.

Compared with the prior art, the invention has the beneficial effects that: the preparation method is simple, the prepared membrane stripping liquid has good environmental protection performance, the membrane stripping treatment effect can be improved, water can be greatly saved, emission can be greatly reduced, and in addition, metal can be effectively protected from being attacked in the membrane stripping process.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides the following technical scheme: the stripping liquid comprises, by weight, 30-45% of a composite alkali, 20-30% of a surfactant, 5-9% of a corrosion inhibitor, and the balance water.

The first embodiment is as follows:

the film stripping liquid comprises 30% of composite alkali, 20% of surfactant, 5% of corrosion inhibitor and the balance of water according to the weight proportion.

In this embodiment, the surfactant component includes, by weight, 3 parts of alkyl dimethyl amine oxide, 2 parts of sodium dodecyl sulfate, 4 parts of sodium alpha-olefin sulfonate, 1 part of an alcohol ether penetrant, and 2 parts of alkanolamide.

In this example, the corrosion inhibitor was composed of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol, and 20% of benzaldehyde.

The preparation method of this example includes the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

In this example, the stirring speed in step A was 100 rpm for 20 min.

In this example, the heating temperature in step A was 55 ℃.

In this example, the stirring speed in step B was 400 rpm for 50 min.

In this example, the standing time in step C was 20 hours.

Example two:

the film stripping liquid comprises 45% of composite alkali, 30% of surfactant, 9% of corrosion inhibitor and the balance of water according to the weight proportion.

In this embodiment, the surfactant component includes, by weight, 8 parts of alkyl dimethyl amine oxide, 6 parts of sodium dodecyl sulfate, 8 parts of sodium alpha-olefin sulfonate, 3 parts of an alcohol ether penetrant, and 6 parts of alkanolamide.

In this example, the corrosion inhibitor was composed of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol, and 20% of benzaldehyde.

The preparation method of this example includes the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

In this example, the stirring speed in step A was 200 rpm for 40 min.

In this example, the heating temperature in step A was 65 ℃.

In this example, the stirring speed in step B was 800 rpm for 60 min.

In this example, the standing time in step C was 24 hours.

Example three:

the stripping liquid comprises 32% of composite alkali, 22% of surfactant, 6% of corrosion inhibitor and the balance of water according to the weight proportion.

In this embodiment, the surfactant component includes, by weight, 4 parts of alkyl dimethyl amine oxide, 3 parts of sodium dodecyl sulfate, 5 parts of sodium alpha-olefin sulfonate, 2 parts of an alcohol ether penetrant, and 3 parts of alkanolamide.

In this example, the corrosion inhibitor was composed of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol, and 20% of benzaldehyde.

The preparation method of this example includes the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

In this example, the stirring speed in step A was 120 rpm for 25 min.

In this example, the heating temperature in step A was 58 ℃.

In this example, the stirring speed in step B was 500 rpm for 52 min.

In this example, the standing time in step C was 21 hours.

Example four:

the stripping liquid comprises 44% of composite alkali, 28% of surfactant, 8% of corrosion inhibitor and the balance of water according to the weight proportion.

In this embodiment, the surfactant component includes, by weight, 7 parts of alkyl dimethyl amine oxide, 5 parts of sodium dodecyl sulfate, 7 parts of sodium α -olefin sulfonate, 2 parts of an alcohol ether penetrant, and 5 parts of alkanolamide.

In this example, the corrosion inhibitor was composed of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol, and 20% of benzaldehyde.

The preparation method of this example includes the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

In this example, the stirring speed in step A was 180 rpm for 38 min.

In this example, the heating temperature in step A was 62 ℃.

In this example, the stirring speed in step B was 700 rpm for 58 min.

In this example, the standing time in step C was 23 hours.

Example five:

the stripping liquid comprises 43% of composite alkali, 22% of surfactant, 6% of corrosion inhibitor and the balance of water according to weight proportion.

In this embodiment, the surfactant component includes, by weight, 4 parts of alkyl dimethyl amine oxide, 5 parts of sodium dodecyl sulfate, 6 parts of sodium alpha-olefin sulfonate, 2 parts of an alcohol ether penetrant, and 3 parts of alkanolamide.

In this example, the corrosion inhibitor was composed of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol, and 20% of benzaldehyde.

The preparation method of this example includes the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

In this example, the stirring speed in step A was 140 rpm for 32 min.

In this example, the heating temperature in step A was 57 ℃.

In this example, the stirring speed in step B was 500 rpm for 54 min.

In this example, the standing time in step C was 21 hours.

Example six:

the film stripping liquid comprises 40% of composite alkali, 25% of surfactant, 8% of corrosion inhibitor and the balance of water according to the weight proportion.

In this embodiment, the surfactant component includes, by weight, 6 parts of alkyl dimethyl amine oxide, 4 parts of sodium dodecyl sulfate, 6 parts of sodium alpha-olefin sulfonate, 2 parts of an alcohol ether penetrant, and 4 parts of alkanolamide.

In this example, the corrosion inhibitor was composed of 10% of oleic acid, 20% of diethylenetriamine, 25% of ethylene oxide, 25% of propiolic alcohol, and 20% of benzaldehyde.

The preparation method of this example includes the following steps:

A. mixing the composite alkali, the surfactant and 1/2 water, adding the mixture into a stirring kettle, heating and stirring the mixture, and then cooling the mixture to room temperature to obtain a mixed solution A;

B. adding a corrosion inhibitor and 1/2 water into the mixed solution A, mixing, and stirring at normal temperature to obtain a mixed solution B;

C. and standing the mixed solution B for a period of time, and filling the obtained membrane stripping liquid.

In this example, the stirring speed in step A was 150 rpm for 30 min.

In this example, the heating temperature in step A was 60 ℃.

In this example, the stirring speed in step B was 600 rpm for 55 min.

In this example, the standing time in step C was 22 hours.

Experimental example:

the stripping liquid prepared by the embodiments of the invention is used for stripping tests, and the obtained data are as follows:

in conclusion, the preparation method is simple, the prepared membrane stripping liquid has good environmental protection performance, the membrane stripping treatment effect can be improved, water can be greatly saved, emission can be greatly reduced, and in addition, metal can be effectively protected from being attacked in the membrane stripping process.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.