CN108410250B

CN108410250B - Environment-friendly novel micro-emulsion printing ink cleaning agent and preparation method thereof

Info

Publication number: CN108410250B
Application number: CN201810421163.5A
Authority: CN
Inventors: 郭照冰; 周一鸣; 梅凤仙
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing University of Information Science and Technology
Priority date: 2018-05-04
Filing date: 2018-05-04
Publication date: 2022-04-08
Anticipated expiration: 2038-05-04
Also published as: CN108410250A

Abstract

The invention relates to an environment-friendly novel micro-emulsion printing ink cleaning agent and a preparation method thereof, wherein the cleaning agent is prepared from the following components in percentage by mass: cleaning the main solvent by 25-30%; 5 to 10 percent of surfactant; 5 to 10 percent of polar solvent; 5 to 10 percent of other auxiliary agents; 50 to 60 percent of water. The invention provides an ink cleaning agent which has the advantages of good cleaning effect, stable property, low VOCs content, easy degradation and capability of cleaning printing equipment, printing plates, printing master plates, ink rollers and printing master plates simultaneously, and a preparation method thereof, aiming at the defects that the existing semi-water-based ink cleaning agent in the market has poor cleaning effect, poor stability, high VOCs content, difficult degradation and incapability of cleaning the printing equipment, the printing plates, the ink rollers and the printing master plates simultaneously.

Description

Environment-friendly novel micro-emulsion printing ink cleaning agent and preparation method thereof

Technical Field

The invention relates to an ink cleaning agent, in particular to an environment-friendly novel micro-emulsion printing ink cleaning agent and a preparation method thereof.

Background

In recent years, the printing industry in China is rapidly developed, and meanwhile, the demand of the ink cleaning agent as an auxiliary material most commonly used in printing is increasing. Therefore, the printing ink cleaning agent has huge market capacity, and the discharge of VOCs caused by the large market capacity cannot be ignored.

The traditional ink cleaning agent using organic solvents such as gasoline, kerosene and the like as main agents has poor safety, is inflammable and explosive, has great potential safety hazards in the aspects of use and storage, has strong volatility and high VOCs content in use, seriously pollutes the printing environment and harms the health of workers, and consumes a large amount of petroleum resources. The water-based printing ink cleaning agent has the defects of serious equipment corrosion caused by strong alkalinity, high cost, poor drying performance, influence on production efficiency, poor cleaning effect and the like. The micro-emulsion printing ink cleaning agent reduces the content of organic solvent, and has good cleaning effect and quick drying.

In the market aspect, the micro-emulsion type ink cleaning agent is one of the main cleaning agents of printing ink at home and abroad, and the related technology is mature. Although the currently researched oil-in-water type ink cleaning agent and micro-emulsion type ink cleaning agent can replace the traditional ink cleaning agent, the phenomena of layering and emulsion breaking are inevitable in the storage process by taking aliphatic hydrocarbon solvents, gasoline or kerosene as main solvents, certain VOCs are still generated in the use process, and the environmental protection and potential safety hazards exist. Meanwhile, most products easily cause equipment corrosion, and printing equipment, printing plates, rubber blankets and the like cannot be cleaned simultaneously. CN201510217989 applies a microemulsion printing car washing water, which has high cleaning efficiency, but the content of VOCs contained in a main solvent is high, and the washing water can corrode a printing master plate for a long time. The invention has the innovativeness that the anionic surfactant and the nonionic surfactant which are low in use cost and easy to degrade are compounded, so that the surface tension of the solution is reduced, and the cleaning efficiency of ink scales is improved. The invention uses a compounding method of adding a small amount of anionic surfactant into a large amount of nonionic surfactant, further reduces the surface tension of the solution and improves the cleaning efficiency. Meanwhile, the reasonable proportion ensures that the stability of the solvent is high after water is added, and the solvent is not easy to delaminate. The content of the main solvent is controlled within 30 percent, the discharge of VOCs is reduced, and the environment is protected. Various selected reagents can not corrode cleaning parts, and automatic cleaning of the cleaning parts can be realized.

Disclosure of Invention

The invention mainly aims to provide an ink cleaning agent which has the advantages of good cleaning effect, stable property, low VOCs content, easy degradation and capability of cleaning printing equipment, printing plates, printing master plates, ink rollers and printing master plates simultaneously and a preparation method thereof, aiming at the defects of poor cleaning effect, poor stability, high VOCs content, difficult degradation, incapability of cleaning the printing equipment, the printing plates, the ink rollers and the printing master plates simultaneously and the like of the existing semi-water-based ink cleaning agent in the market.

The technical scheme provided by the invention is as follows:

an environment-friendly novel microemulsion printing ink cleaning agent is prepared from the following components:

further, the main solvent is 200# solvent oil.

Further, the surfactant is selected from sorbitan fatty acid ester (span-80), alkyl glycoside (APG), and sodium dodecylbenzenesulfonate (LAS).

Furthermore, the polar solvent is selected from one or a mixture of more of isopropanol, absolute ethyl alcohol, ethylene glycol monobutyl ether and diethylene glycol monomethyl ether.

Furthermore, the other auxiliary agents are one or a mixture of more of urea, benzotriazole and triethanolamine.

The invention also discloses a preparation method of the environment-friendly novel microemulsion printing ink cleaning agent, which comprises the steps of weighing the components according to the proportion, fully stirring the main solvent and the polar solvent at normal temperature to obtain a composite solvent, mixing the anion and the nonionic surfactant, adding the mixed solvent after fully stirring to completely dissolve the components, adding other auxiliary agents, and finally adding water; and after complete dissolution, obtaining uniform clear transparent liquid or light yellow transparent liquid which is the microemulsion printing ink cleaning agent.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the anionic surfactant and the nonionic surfactant which are low in cost and easy to degrade are compounded, so that the surface tension of the solution is reduced, and the cleaning efficiency of ink stains is improved. The invention uses a compounding method of adding a small amount of anionic surfactant into a large amount of nonionic surfactant, further reduces the surface tension of the solution and improves the cleaning efficiency. Meanwhile, the reasonable proportion ensures that the stability of the solvent is high after water is added, and the solvent is not easy to delaminate. The content of the main solvent is controlled within 30 percent, the discharge of VOCs is reduced, and the environment is protected. Various selected reagents can not corrode cleaning parts, and automatic cleaning of the cleaning parts can be realized.

Detailed Description

The raw materials and equipment used in the present invention are all commercially available products, and in order to make the present invention easily understood, the present invention will be further described with reference to the following specific examples.

Example 1

The microemulsion printing ink cleaner in this example was prepared by mixing the ingredients in the following table.

TABLE 1

Weighing the components according to the proportion, fully stirring the main solvent and the polar solvent at normal temperature to obtain a composite solvent, mixing the anion and the nonionic surfactant, fully stirring, adding the mixed solvent to completely dissolve the components, adding other auxiliaries, and finally adding water. And after complete dissolution, obtaining uniform clear transparent liquid or light yellow transparent liquid which is the microemulsion printing ink cleaning agent. When in use, the mixture is uniformly stirred with water according to the proportion of 1: 3.

The cleaning efficiency of the invention reaches 100% through detection and analysis.

Example 2

TABLE 2

Components	Percentage of
		200# solvent oil	25％
Anhydrous ethanol	5％
		Ethylene glycol monobutyl ether	10％
span-80	3％
		APG	2％
LAS	1％
		Sodium tripolyphosphate	1％
Benzotriazole	2％
		Water (W)	Balance of

The preparation method is the same as that of example 1. The cleaning effect and performance index were the same as those of example 1.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.

Claims

1. An environment-friendly novel microemulsion printing ink cleaning agent is characterized in that: is prepared from the following components:

the main solvent is 200# solvent oil;

the surfactant is selected from three mixtures of 4% of sorbitan fatty acid ester (span-80), 1% of alkyl glycoside (APG) and 1% of sodium dodecyl benzene sulfonate (LAS) or three mixtures of 3% of sorbitan fatty acid ester (span-80), 2% of alkyl glycoside (APG) and 1% of sodium dodecyl benzene sulfonate (LAS);

the polar solvent is selected from one or a mixture of more of isopropanol, absolute ethyl alcohol, ethylene glycol monobutyl ether and diethylene glycol monomethyl ether;

the other auxiliary agent is one or a mixture of more of urea, benzotriazole and triethanolamine;

the preparation method comprises the following steps: weighing the components according to the proportion, at normal temperature, fully stirring the main solvent and the polar solvent to obtain a composite solvent, mixing the anion and the nonionic surfactant, fully stirring, adding the mixed solvent to completely dissolve the components, adding other auxiliaries, and finally adding water; and after complete dissolution, obtaining uniform clear transparent liquid or light yellow transparent liquid which is the microemulsion printing ink cleaning agent.