阅读说明：本技术 一种pet塑胶板清洗剂及其制备方法和使用方法 (PET plastic board cleaning agent and preparation method and use method thereof ) 是由 肖建军 钟俊杰 于 2021-09-22 设计创作，主要内容包括：本发明涉及工业清洗剂的技术领域,更具体地说,它涉及一种PET塑胶板清洗剂及其制备方法和使用方法。PET塑胶板清洗剂包括窄分子量分布古伯特醇聚氧乙烯醚(5EO)、氢氧化钠、柠檬酸、异辛酸、草酸、十二烷基二甲基氯化铵、醇类物质和去离子水。通过先将去离子水、氢氧化钾、柠檬酸、草酸和异辛酸进行搅拌混合,然后依次加入窄分子量分布古伯特醇聚氧乙烯醚(5EO)、十二烷基二甲基氯化铵和醇类物质,再进行搅拌混合的方法得到PET塑胶板清洗剂。使用本发明的PET塑胶板清洗剂不仅不易对产品的品质造成影响,而且提高了安全环保性能。(The invention relates to the technical field of industrial cleaning agents, in particular to a PET plastic board cleaning agent and a preparation method and a using method thereof. The PET plastic board cleaning agent comprises narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), sodium hydroxide, citric acid, isooctanoic acid, oxalic acid, dodecyl dimethyl ammonium chloride, alcohols and deionized water. The PET plastic board cleaning agent is obtained by stirring and mixing deionized water, potassium hydroxide, citric acid, oxalic acid and isooctanoic acid, then sequentially adding narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), dodecyl dimethyl ammonium chloride and alcohol substances, and then stirring and mixing. The PET plastic board cleaning agent disclosed by the invention is not easy to influence the quality of a product, and the safety and environmental protection performance are improved.)

1. The PET plastic board cleaning agent is characterized in that: comprises the following components in percentage by weight:

4-6% of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3% -5% of sodium hydroxide;

4% -5% of citric acid;

2 to 3 percent of isooctanoic acid;

2 to 3 percent of oxalic acid;

2% -3% of dodecyl dimethyl ammonium chloride;

3% -5% of alcohols;

the balance of deionized water.

2. The detergent for cleaning PET plastic plates as claimed in claim 1, wherein: the alcohol substance comprises 70-100 wt% of isohexide and the balance butanol.

3. The detergent for cleaning PET plastic plates as claimed in claim 2, wherein: the alcohol substance comprises 98 percent of isohexide and 2 percent of butanol by weight percentage.

4. The detergent for PET plastic board as claimed in any one of claims 1-3, wherein: comprises the following components in percentage by weight:

4-5% of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3% -4% of sodium hydroxide;

4% -4.5% of citric acid;

2 to 3 percent of isooctanoic acid;

2 to 2.5 percent of oxalic acid;

2% -3% of dodecyl dimethyl ammonium chloride;

3% -4% of alcohols;

the balance of deionized water.

5. The PET plastic board cleaning agent according to claim 4, wherein: comprises the following components in percentage by weight:

4% of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3.7 percent of sodium hydroxide;

4.5 percent of citric acid;

2.6 percent of isooctanoic acid;

2.1 percent of oxalic acid;

2.7 percent of dodecyl dimethyl ammonium chloride;

4% of alcohols;

the balance of deionized water.

6. The detergent for cleaning PET plastic plates as claimed in claim 5, wherein: the citric acid is food grade citric acid monohydrate.

7. A preparation method of a PET plastic board cleaning agent is characterized by comprising the following steps: the method comprises the following steps:

step A: sequentially adding potassium hydroxide, citric acid, oxalic acid and isooctanoic acid into deionized water according to the weight percentage, adjusting the reaction temperature to 40-50 ℃, and stirring and mixing;

and B: and D, sequentially adding the narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), dodecyl dimethyl ammonium chloride and alcohol substances into the mixture obtained in the step A at 35-40 ℃, and stirring and mixing to obtain the PET plastic board cleaning agent.

8. The preparation method of the PET plastic board cleaning agent according to claim 7, wherein the cleaning agent comprises: in the step A, the pH value is adjusted to 8.0-8.5, the stirring time is 30 minutes, and the stirring speed is 100-200 rpm.

9. The method for preparing a cleaning agent for PET plastic plates according to claim 7 or 8, wherein the cleaning agent comprises: in the step B, the stirring time is 30 minutes, and the stirring speed is 100-200 rpm.

10. A use method of a PET plastic board cleaning agent is characterized by comprising the following steps: the method comprises the following steps: soaking a piece to be cleaned in the PET plastic board cleaning agent prepared according to any one of claims 7-9 at the temperature of 45 ℃ for ultrasonic cleaning for 60-120s, wherein the ultrasonic frequency is 20 Khz.

Technical Field

The invention relates to the technical field of industrial cleaning agents, in particular to a PET plastic board cleaning agent and a preparation method and a using method thereof.

Background

Industrial cleaning plays an important role in surface treatment, and is an indispensable pretreatment and post-treatment step in surface treatment. The suitable industrial cleaning agent has excellent cleaning property, does not damage base materials, is easy to rinse, is efficient and environment-friendly, can improve the production capacity, ensures the product quality and reduces the production cost. In recent years, due to the continuous improvement of the surface treatment technology of the mobile phone, the continuous emergence of advanced surface coloring and the development of processes and workpiece materials, the development of the industrial cleaning technology is promoted. With the increasing investment of PET materials in the fields of high-end automobiles, electronic components and 3C and the enhancement of environmental awareness of people, new requirements are put forward on the cleaning agent.

At present, most of cleaning agents mainly use phosphate, but the phosphate has high pollution, causes environmental pollution and ground water deterioration, threatens human health, and meanwhile, the cleaning agent with higher pH value is easy to cause different colors on the PET substrate and the surface of the colored PET substrate, so that the development of the cleaning agent for the PET plastic plate, which is environment-friendly and is not easy to damage the product quality, is necessary.

Disclosure of Invention

The PET plastic board cleaning agent, the preparation method and the use method thereof provided by the invention have the advantages of safety and environmental friendliness while the quality of a product is not easily affected.

In a first aspect, the invention provides a PET plastic board cleaning agent, which adopts the following technical scheme: the PET plastic board cleaning agent comprises the following components in percentage by weight:

4-6% of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3% -5% of sodium hydroxide;

4% -5% of citric acid;

2 to 3 percent of isooctanoic acid;

2 to 3 percent of oxalic acid;

2% -3% of dodecyl dimethyl ammonium chloride;

3% -5% of alcohols;

the balance of deionized water.

In the formula of the invention, sodium hydroxide is 99% flake caustic produced by Binhua corporation, which is used as alkali stock and organic acid neutralization in the formula system, citric acid and sodium hydroxide neutralization can generate chelating agent, and simultaneously can be used as buffer solution of the system, thus being easy to stably control the pH value of the system. Isooctanoic acid and narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO) are industrial products with the content of 99 percent, and dodecyl dimethyl ammonium chloride is industrial product with the content of 50 percent. The oxalic acid is industrial grade oxalic acid, and the deionized water is produced by an RO reverse osmosis filter membrane.

According to the invention, the chelating agent is obtained by utilizing the action of citric acid, isooctanoic acid, oxalic acid and sodium hydroxide, the traditional chelating agent is not required to be added, the high cloud point stability and emulsibility of high-quality narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO) and the calcium soap dispersing capacity and electrolyte resistance of the chelating agent play a synergistic effect, the adsorption force of dirt on a PET plastic plate can be reduced, the quality of a product is not easily influenced, and the advantages of safety and environmental protection are achieved.

Preferably, the alcohol substance comprises isohexide with the weight percentage content of 70-100% and the balance butanol.

Preferably, the alcohol substance comprises 98% by weight of isohexide and 2% by weight of butanol.

The isohexide can well wet hard surfaces, and the dirt-removing capacity of the emulsifier is improved. Butanol is a wetting agent, solubilizing isohexide and synergizing the wetting action of isohexide during cleaning.

Preferably, the PET plastic board cleaning agent comprises the following components in percentage by weight:

4-5% of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3% -4% of sodium hydroxide;

4% -4.5% of citric acid;

2 to 3 percent of isooctanoic acid;

2 to 2.5 percent of oxalic acid;

2% -3% of dodecyl dimethyl ammonium chloride;

3% -4% of alcohols;

the balance of deionized water.

Preferably, the PET plastic board cleaning agent comprises the following components in percentage by weight:

4% of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3.7 percent of sodium hydroxide;

4.5 percent of citric acid;

2.6 percent of isooctanoic acid;

2.1 percent of oxalic acid;

2.7 percent of dodecyl dimethyl ammonium chloride;

4% of alcohols;

the balance of deionized water.

Preferably, the citric acid is food grade citric acid monohydrate.

In a second aspect, the application provides a preparation method of a PET plastic board cleaning agent, which adopts the following technical scheme:

a preparation method of a PET plastic board cleaning agent comprises the following steps:

step A: sequentially adding potassium hydroxide, citric acid, oxalic acid and isooctanoic acid into deionized water according to the weight percentage, adjusting the reaction temperature to 40-50 ℃, and stirring and mixing;

and B: and D, sequentially adding the narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), dodecyl dimethyl ammonium chloride and alcohol substances into the mixture obtained in the step A at 35-40 ℃, and stirring and mixing to obtain the PET plastic board cleaning agent.

Preferably, in the step A, the pH value is adjusted to 8.0-8.5, the stirring time is 30 minutes, and the stirring speed is 100-200 rpm.

Preferably, in the step B, the stirring time is 30 minutes, and the stirring speed is 100-200 rpm.

In a third aspect, the application provides a use method of a PET plastic board cleaning agent, which adopts the following technical scheme:

a use method of a PET plastic board cleaning agent comprises the following steps: soaking a piece to be cleaned in the PET plastic board cleaning agent prepared according to any one of claims 7-9 at the temperature of 45 ℃ for ultrasonic cleaning for 60-120s, wherein the ultrasonic frequency is 20 Khz.

The use method of the PET plastic board cleaning agent prepared by the invention can be used for cleaning the surface dirt of the PET plastic board, the cleaning process has no peculiar smell, no phosphorus and no VOC, and the production environment quality is improved.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the formula of the invention is a non-traditional oil removing agent system without adding traditional phosphorus-containing chelating agent, the wastewater is easy to treat, and the COD output is low.

2. By self-preparation of a chelating agent, stable control of the pH value, addition of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), dodecyl dimethyl ammonium chloride and mixed alcohol, the synergistic effect is generated, the surface stains can be efficiently cleaned in the cleaning process of the PET plastic plate, no cleaning agent residue is generated after the surface of the PET plastic plate is subjected to heterochromatic bleaching, and the yield after cleaning reaches 99%.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1

The PET plastic board cleaning agent comprises the following components in percentage by weight:

4.6 percent of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3.5 percent of sodium hydroxide;

4.5 percent of citric acid;

2.2 percent of isooctanoic acid;

2.3 percent of oxalic acid;

2.3 percent of dodecyl dimethyl ammonium chloride;

3.5% of alcohols;

the balance of deionized water.

Wherein the alcohol substance comprises 98% of isohexide and 2% of butanol. The citric acid is citric acid monohydrate.

The preparation method of the PET plastic board cleaning agent comprises the following steps:

step A: sequentially adding potassium hydroxide, citric acid, oxalic acid and isooctanoic acid into deionized water according to the weight percentage content, adjusting the reaction temperature to be 40-50 ℃, adjusting the pH value to be 8.0-8.5, stirring and mixing for 30 minutes at the stirring speed of 100-200 rpm.

And B: and D, sequentially adding the narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), dodecyl dimethyl ammonium chloride and alcohol substances into the mixture obtained in the step A at the temperature of 35-40 ℃, and stirring and mixing for 30 minutes at the stirring speed of 100-200 rpm to obtain the PET plastic plate cleaning agent.

The use method of the PET plastic board cleaning agent comprises the following steps: and soaking the part to be cleaned in the prepared PET plastic plate cleaning agent at the temperature of 45 ℃, and performing ultrasonic cleaning for 60-120s, wherein the ultrasonic frequency is 20 Khz.

Examples 2 to 6

A PET plastic plate cleaning agent is different from the cleaning agent in example 1 in the amount of each component, and the specific reference is made to Table 1.

TABLE 1 proportions of the components of examples 1-6

Example 7

The PET plastic board cleaning agent comprises the following components in percentage by weight:

4.8 percent of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5 EO);

3.8 percent of sodium hydroxide;

4.2% of citric acid;

2.5 percent of isooctanoic acid;

2.4 percent of oxalic acid;

2.2 percent of dodecyl dimethyl ammonium chloride;

4.0% of alcohols;

the balance of deionized water.

Wherein the alcohol is a single component of isohexide.

The preparation method and the using method of the PET plastic plate cleaning agent of this embodiment are the same as those of embodiment 2, and are not described herein again.

Example 8

A PET plastic board cleaning agent is different from the cleaning agent in example 7 in that alcohol substances consist of 50% of isohexide and 50% of butanol.

Example 9

A cleaning agent for PET plastic plates is different from that in example 3 in that citric acid is industrial-grade citric acid.

Comparative example 1

The PET plastic board cleaning agent is different from the PET plastic board cleaning agent in the embodiment 6 in that benzyltriethylammonium chloride with the same dosage is adopted to replace dodecyldimethylammonium chloride, and the rest is the same as the embodiment 6, and the details are not repeated.

Comparative example 2

A PET plastic board cleaning agent is different from that in example 6 in that narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (2EO) is used instead of narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), and the rest is the same as that in example 6, and the description is omitted.

Comparative example 3

A PET plastic board cleaning agent is different from the cleaning agent in the embodiment 6 in that isooctanol polyoxyethylene ether is used for replacing narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO), and the rest is the same as the cleaning agent in the embodiment 6, and the details are not repeated.

Performance test

And (3) detecting the appearance of the stock solution: and observing the appearance color state of the PET plastic plate cleaning agent by a visual inspection method, wherein the PET plastic plate cleaning agent is qualified if no foreign matters or abnormal colors appear. The specific results are shown in Table 2.

Detection of surface tension: and (5) testing the surface tension of the stock solution by using an SITA surface tension meter, wherein the surface tension value is less than or equal to 30N/m, and the stock solution is qualified. The specific results are shown in Table 2.

Detection of relative density: the PET plastic board cleaning agent stock solutions prepared in examples 1 to 9 and comparative examples 1 to 3 were subjected to relative density measurement according to GB/T1884 and GB/T1885. The specific results are shown in Table 2.

And (3) detection of pH value: and (3) testing the pH value of the stock solution by using a pH meter, wherein the pH value is closer to 7.0, the influence on the heterochrosis of the PET surface is smaller, but the dirt removing capability of the PET surface is reduced, and the pH value is more than or equal to 8 and less than or equal to 8.6, so that the PET surface is qualified. The specific results are shown in Table 2.

Detecting the PET non-heterochrosis yield: the stock solutions of the PET plastic board cleaning agents prepared in the examples 1-9 and the comparative examples 1-3 are prepared into diluents with mass concentration of 1%, and the PET plastic boards are respectively placed in the diluents for ultrasonic soaking cleaning at 45 ℃ for 2min, wherein the ultrasonic frequency is 20 Khz. The non-heterochromatic yield data of the cleaned PET plastic plate are recorded, and the specific results are shown in Table 2.

And (3) detecting the PET decontamination yield: the test standard is the same as the detection standard of the PET non-heterochromatic yield, the smudge-removing yield data of the cleaned PET plastic plate is recorded, and the specific result is shown in table 2.

It is determined that the higher the PET non-discoloration yield and the PET contamination removal yield, the more excellent the cleaning performance of the cleaning agent.

TABLE 2 data of test results

According to the examples 1 to 9 and the comparative examples 1 to 3 and the combination of the examples and the table 2, it can be seen that the PET plastic board cleaning agent prepared by adopting the synergistic effect of the high cloud point stability and the emulsibility of the narrow molecular weight distribution Gubert alcohol polyoxyethylene ether (5EO) and the lime soap dispersing ability and the electrolyte resistance of the chelating agent can improve the cleaning effect of the PET plastic board by matching with the ultrasonic cleaning method, the non-heterochrosis yield of the PET plastic board can reach more than 95%, and the decontamination yield of the PET plastic board can reach more than 96%.

By comparing the example 6 with the comparative examples 1 to 3 and combining the table 2, it can be seen that in the formulation of the PET plastic board cleaning agent of the present invention, the narrow molecular weight distribution of the gubert alcohol polyoxyethylene ether (5EO), the dodecyl dimethyl ammonium chloride and the alcohol have a synergistic effect, and when one of the components is substituted, the cleaning effect of the prepared PET plastic board cleaning agent on the PET plastic board is significantly reduced.

Comparing examples 1-6 with table 2, it can be seen that, when the formulation of the specific mixture ratio in example 3 is adopted, the PET plastic board cleaning agent prepared by the method has better performance in the aspects of PET non-heterochrosis yield detection and PET stain removal yield detection, i.e. the cleaning effect is best.

By comparing examples 2 and 7-8 and combining table 2, it can be seen that the compatibility of the formula is improved by using isohexide and butanol with specific ratios as alcohol substances, the effects of the alcohol substances and other components of the formula system can be promoted, and the cleaning effect of the PET plastic board cleaning agent on the PET plastic board is further improved.

As can be seen by comparing example 3 with example 9 and by combining Table 2, the use of specific food grade citric acid monohydrate can improve the cleaning effect of the PET plastic plate cleaning agent on the PET plastic plate.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.