CN110065323A - A kind of polyvinyl alcohol exempts from alcohol edition-0 moistening liquid and preparation method thereof - Google Patents

Abstract

The invention discloses a polyvinyl alcohol-free alcohol-free fountain solution and a preparation method thereof. The fountain solution is composed of surfactants such as oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide and fatty alcohol polyoxyethylene ether sodium sulfate. The mixed solution is used to reduce the surface tension of the liquid. Since there is no volatile and low flash point substance such as alcohol or isopropanol, the alcohol-free fountain solution prepared by the present invention makes the printing operator exempt from alcohol or isopropanol. It is safe and environmentally friendly when used, and there is no VOC discharge, so it is beneficial to energy saving and emission reduction; no volatile substances, strong stability, simple and easy to operate, and easy to control by operators in terms of dosage control.

Description

A kind of polyvinyl alcohol alcohol-free fountain solution and preparation method thereof

technical field

The invention belongs to the field of lithographic printing, relates to a lithographic printing fountain solution, in particular to a polyvinyl alcohol-free alcohol fountain solution and a preparation method thereof.

Background technique

Lithography is the current mainstream technology, which uses the principle of "oil and water incompatibility" to implement printing, so fountain solution is an important printing material. Alcohol dampening solution has been used in lithographic printing for many years. Adding alcohol (or isopropyl alcohol) to dampening solution reduces surface tension, which not only improves dampening speed, but also improves print quality.

However, there are many problems with alcohol fountain solution. For example, because alcohol (or isopropyl alcohol) volatilizes quickly, a cooling device needs to be added to reduce the volatilization of the printing press, which complicates the structure of the machine and increases the manufacturing cost; because alcohol (or isopropyl alcohol) There is a fire hazard during storage with a low flash point; because alcohol (or isopropyl alcohol) has a certain toxicity, which endangers the health of operators; because the use of alcohol (or isopropyl alcohol) increases VOC emissions, which is not conducive to environmental protection. To sum up, the use of alcohol fountain solution has many drawbacks, and it is not suitable for the trend of green printing. Therefore, researching a safe and environmentally friendly alcohol-free fountain solution that can completely replace alcohol fountain solution is an important topic in the printing industry. The development of alcohol-free fountain solution has good economic benefits for printing enterprises, and also meets the social needs of green printing.

At present, some alcohol-free fountain solutions have been used in the market, but the technology is not yet mature. For example, the dosage and alcohol fountain solutions vary greatly, which is difficult for operators to control; the stability is not strong, and the frequency of changing fountain solutions and cleaning water buckets is too high. , increased auxiliary time, etc.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a polyvinyl alcohol-free alcohol-free fountain solution and a preparation method thereof, which is convenient for dosage control, achieves the purposes of safety, environmental protection, energy conservation and emission reduction, and maintains alcohol moisturizing in terms of printed matter quality. The original advantages of the version liquid.

For achieving the above object, the technical scheme adopted in the present invention is:

A polyvinyl alcohol-free alcohol fountain solution, which comprises the following components by mass percentage:

Polyvinyl Alcohol 10-15%, Potassium Oxalate 0.2-0.8%, Tackifier 5-10%, Diethanolamine Oleate 0.5-2.5%, Coconut Fatty Acid Diethanolamide 1.2-2%, Alkanolamide 0.2-0.5% , bactericide 0.1-0.5%, fatty alcohol polyoxyethylene ether sodium sulfate 2-5%, defoamer 0.2-0.5%, sodium oxalate 0.8-2.5%, emulsified silica aerogel 0.1-0.3%, The remainder is water.

Further, the tackifier is natural bone glue, gelatin or chitosan.

Further, the bactericide is sodium benzoate, hydrogen peroxide or potassium permanganate.

Further, the defoamer is polyethylene glycol ether or polyethylene glycol.

Further, the molecular weight of the polyvinyl alcohol is 510-1050.

A method for preparing a polyvinyl alcohol-free alcohol-free fountain solution. Water is added to a reaction kettle and heated to 30-55° C., and then other groups are respectively added to the reaction kettle for heat preservation and stirring to emulsify, so as to obtain a polyvinyl alcohol-free alcohol-free fountain solution. Fountain solution.

A polyvinyl alcohol-free alcohol fountain solution, the pH value is 4.3-5.30, the electrical conductivity is 820-1400 μs/cm, and the surface tension is 42-55 mN/m.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention consists of polyvinyl alcohol, potassium oxalate, tackifier, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, bactericide, fatty alcohol polyoxyethylene ether sodium sulfate, defoamer, sodium oxalate, emulsifier The resulting silica aerogel and water are mixed and then heated and emulsified; a mixed solution of surfactants such as oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide and fatty alcohol polyoxyethylene ether sodium sulfate It is used to reduce the surface tension of the liquid. Since there is no volatile and low flash point substance such as alcohol or isopropanol, the polyvinyl alcohol-free fountain solution made by the present invention enables the printing operator to dispense with alcohol or isopropanol. It is safe and environmentally friendly when used, and there is no VOC discharge, so it is beneficial to energy saving and emission reduction.

The polyvinyl alcohol-free alcohol fountain solution prepared by the invention has a pH value of 4.3-5.30, an electrical conductivity of 820-1400 μs/cm, and a surface tension of 42-55 mN/m, which can completely replace the alcohol fountain solution currently used in lithographic printing. , the effect is good, it can be applied to the printing of ordinary paper or carbonless copy paper using CTP plate or PS plate on various lithographic printing machines, and it can improve the quality of printing products and reduce production costs.

The invention also maintains the original advantages of the alcohol fountain solution in terms of the quality of the printed matter, and has no volatile substances, strong stability, simple and easy operation in proportioning, and convenient control by operators in the aspect of dosage control.

Detailed ways

The present invention will be described in further detail below with reference to specific embodiments, but it is not intended to limit the present invention.

Example 1:

Polyvinyl alcohol with a molecular weight of 510, potassium oxalate, natural bone glue, diethanolamine oleate, coconut oil fatty acid diethanolamide, alkanolamide, sodium benzoate, fatty alcohol polyoxyethylene ether sodium sulfate, polyethylene glycol ether, oxalic acid The mixture formed by sodium, emulsified silica aerogel and water is emulsified at 30°C; wherein, in terms of mass percentage, polyvinyl alcohol accounts for 13% of the mass of the mixture, and natural bone glue accounts for 10% of the mass of the mixture , potassium oxalate accounts for 0.5% of the mass of the mixture, diethanolamine oleate accounts for 2.5% of the mass of the mixture, coconut oil fatty acid diethanolamide accounts for 1.5% of the mass of the mixture, alkanolamide accounts for 0.5% of the mass of the mixture, and sodium benzoate accounts for the mass of the mixture. 0.2%, fatty alcohol polyoxyethylene ether sodium sulfate accounts for 2.8% of the mixture, polyethylene glycol ether accounts for 0.3% of the mixture, sodium oxalate accounts for 1.8% of the mixture, and the emulsified silica aerogel accounts for the mixture. 0.1% of mass.

The preparation method of the present embodiment polyvinyl alcohol-free alcohol fountain solution is:

Add water to the reactor and heat to 30°C, then add polyvinyl alcohol, potassium oxalate, natural bone glue, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, sodium benzoate, fatty alcohol polyoxyethylene at 30°C Sodium ether sulfate, polyethylene glycol ether, emulsified silica aerogel and sodium oxalate are stirred for 30 minutes at a temperature to obtain a polyvinyl alcohol-free fountain solution.

After testing, the main properties of the polyvinyl alcohol alcohol-free fountain solution prepared in the present embodiment are as follows:

pH: 4.3-5.3, Conductivity: 820-1400μs/cm, Surface Tension: 42-55mN/m

Example 2:

It is composed of polyvinyl alcohol with a molecular weight of 1050, potassium oxalate, gelatin, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, hydrogen peroxide, fatty alcohol polyoxyethylene ether sodium sulfate, polyethylene glycol, sodium oxalate, emulsified The resulting mixture of silica aerogel and water is emulsified at 40°C; wherein, in terms of mass percentage, polyvinyl alcohol accounts for 10% of the mixture, gelatin accounts for 5%, and potassium oxalate accounts for 5%. 0.7% of the mixture mass, oleic acid diethanolamine 0.5% of the mixture mass, coconut oil fatty acid diethanolamide 1.8% of the mixture mass, alkanolamide 0.2% of the mixture mass, hydrogen peroxide 0.5% of the mixture mass, fatty alcohol Sodium polyoxyethylene ether sulfate accounts for 2.0% of the mixture, polyethylene glycol accounts for 0.2% of the mixture, sodium oxalate accounts for 1.0% of the mixture, and the emulsified silica aerogel accounts for 0.2% of the mixture.

The preparation method of the present embodiment polyvinyl alcohol-free alcohol fountain solution is:

Add water to the reactor and heat to 40°C, then add polyvinyl alcohol, potassium oxalate, gelatin, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, hydrogen peroxide, fatty alcohol polyoxyethylene ether sulfuric acid at 40°C Sodium, polyethylene glycol, sodium oxalate, and the emulsified silica aerogel are kept stirring for 30 minutes to obtain a polyvinyl alcohol-free fountain solution.

Example 3:

It is composed of polyvinyl alcohol with a molecular weight of 800, potassium oxalate, chitosan, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, potassium permanganate, fatty alcohol polyoxyethylene ether sodium sulfate, polyethylene glycol The mixture of ether, sodium oxalate, emulsified silica aerogel and water is emulsified at 55 ° C; wherein, in terms of mass percentage, polyvinyl alcohol accounts for 15% of the mass of the mixture, and chitosan accounts for the mixture 8% by mass, potassium oxalate 0.2% by mass, diethanolamine oleate 1.4% by mass, coconut oil fatty acid diethanolamide 1.2% by mass, alkanolamide 0.4% by mass, high manganese Potassium acid accounts for 0.1% of the mass of the mixture, sodium sulphate of fatty alcohol polyoxyethylene ether accounts for 5.0% of the mass of the mixture, polyethylene glycol ether accounts for % of the mass of the mixture, sodium oxalate accounts for 0.8% of the mass of the mixture, and the emulsified silica Aerogel constitutes 0.3% of the mass of the mixture.

The preparation method of the present embodiment polyvinyl alcohol-free alcohol fountain solution is:

Add water to the reactor and heat to 55°C, then add polyvinyl alcohol, potassium oxalate, chitosan, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, potassium permanganate, fatty alcohol at 55°C Sodium polyoxyethylene ether sulfate, polyethylene glycol ether, sodium oxalate, and the emulsified silica aerogel are stirred for 30 minutes at a temperature to obtain a polyvinyl alcohol-free fountain solution.

Example 4:

It consists of polyvinyl alcohol with a molecular weight of 700, natural bone glue, potassium oxalate, natural bone glue, oleic acid diethanolamine, coconut oil fatty acid diethanolamide, alkanolamide, sodium benzoate, fatty alcohol polyoxyethylene ether sulfate sodium, polyethylene glycol The mixture of ether, sodium oxalate, emulsified silica aerogel and water is emulsified at 45°C; in which, in terms of mass percentage, polyvinyl alcohol accounts for 12% of the mass of the mixture, and natural bone glue accounts for the mass of the mixture 9% of the mixture, potassium oxalate 0.8% of the mixture, oleic acid diethanolamine 2.0% of the mixture, coconut oil fatty acid diethanolamide 2.0% of the mixture, alkanolamide 0.3% of the mixture, and sodium benzoate 0.4% of the mixture mass, fatty alcohol polyoxyethylene ether sodium sulfate accounted for 3.6% of the mixture mass, polyethylene glycol ether accounted for 0.4% of the mixture mass, sodium oxalate accounted for 2.5% of the mixture mass, the emulsified silica aerosol Gum is 0.15% of the mass of the mixture.

The preparation method of the present embodiment polyvinyl alcohol-free alcohol fountain solution is:

Add water to the reactor and heat to 45°C, then add polyvinyl alcohol, natural bone glue, potassium oxalate, natural bone glue, diethanolamine oleate, coconut oil fatty acid diethanolamide, alkanolamide, sodium benzoate, fatty alcohol at 45°C Sodium polyoxyethylene ether sulfate, polyethylene glycol ether, sodium oxalate, and the emulsified silica aerogel are stirred for 30 minutes at a temperature to obtain a polyvinyl alcohol-free fountain solution.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: Modifications or equivalent substitutions are made to the specific embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention shall all be included in the scope of the present claims.

Claims (7)

1. a polyvinyl alcohol-free alcohol fountain solution is characterized in that comprising the following components in mass percent: Polyvinyl Alcohol 10-15%, Potassium Oxalate 0.2-0.8%, Tackifier 5-10%, Diethanolamine Oleate 0.5-2.5%, Coconut Fatty Acid Diethanolamide 1.2-2%, Alkanolamide 0.2-0.5% , bactericide 0.1-0.5%, fatty alcohol polyoxyethylene ether sodium sulfate 2-5%, defoamer 0.2-0.5%, sodium oxalate 0.8-2.5%, emulsified silica aerogel 0.1-0.3%, The remainder is water. 2. The polyvinyl alcohol alcohol-free fountain solution according to claim 1, wherein the tackifier is natural bone glue, gelatin or chitosan. 3. polyvinyl alcohol alcohol-free fountain solution according to claim 1, is characterized in that: described bactericide is sodium benzoate, hydrogen peroxide or potassium permanganate. 4. polyvinyl alcohol alcohol-free fountain solution according to claim 1, is characterized in that: described defoamer is polyethylene glycol ether or polyethylene glycol. 5. The polyvinyl alcohol alcohol-free fountain solution according to claim 1, wherein the molecular weight of the polyvinyl alcohol is 510-1050. 6. a preparation method of any one of claims 1-5 polyvinyl alcohol-free alcohol-free fountain solution, it is characterized in that: water is added in the reactor and heated to 30-55 ℃, then other each group is added to the reactor respectively Incubate and stir to emulsify in medium to obtain polyvinyl alcohol-free alcohol fountain solution. 7. A polyvinyl alcohol alcohol-free fountain solution prepared by the method of claim 6, characterized in that: the pH value is 4.3-5.30, the electrical conductivity is 820-1400 μs/cm, and the surface tension is 42-55 mN/m.