Cinnamic acid epoxy-polyacrylic acid combined ink for photocuring water-based ink jet

Abstract

The invention relates to the technical field of ink-jet ink, in particular to photocuring water-based ink-jet ink and a preparation process thereof, and the technical scheme is as follows: the photocuring water-based ink-jet ink comprises the following components in parts by weight: 40-60 parts of cinnamic acid epoxy resin, 40 parts of polyacrylic acid, 50 parts of water, 7 parts of a stabilizer and 3 parts of a defoaming agent; the stabilizer is prepared from the following raw materials in parts by weight: 4 parts of tea polyphenol, 5 parts of acetic acid, 6 parts of saline water, 6 parts of sodium dichloroisocyanurate and 6 parts of anhydrous sodium metasilicate. Epoxy resin is used as light-cured ink matrix resin, the system viscosity is reduced, the curing speed is increased and the like by changing the formula and components of the light-cured ink-jet ink, and therefore the ink which is high in performance, low in price and capable of meeting the requirements is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet ink, and more specifically to a cinnamic acid epoxy-polyacrylic acid composite ink for photocurable water-based inkjet. Background Art

[0002] Photocuring inkjet printing is a technology developed at the end of the 20th century. It has the convenience of inkjet printing technology in use and operation, and the advantages of photocuring technology in efficiency and physical properties. Inkjet inks are mostly thick liquids and can be divided into two categories: (1) water-based printing inks, which are suitable for rubber printing and wood printing; (2) oil-based printing inks, which are suitable for metal printing. Photocuring inkjet technology is favored by people because of its wide applicability, high flexibility, relatively low cost, energy saving and environmental protection.

[0003] Water-based ink does not contain volatile organic solvents, does not pollute the atmosphere, and is non-flammable. Its application equipment cost is relatively low, so it still dominates in home and office printers. In addition, it has been very successfully applied in digital textile printing, indoor graphics, direct mail, decoration and product authentication.

[0004] Photocurable inkjet ink can provide good color vividness and image quality, but it may fade or deteriorate after long-term use and show poor weather resistance. Therefore, we design a photocurable water-based inkjet ink and its preparation process. Summary of the invention

[0005] In order to overcome the above defects of the prior art, the present invention provides a photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink to solve the problems existing in the above background technology.

[0006] The present invention provides the following technical solution: a photocurable water-based inkjet cinnamic acid epoxy-polyacrylic acid combination ink, characterized in that it comprises the following raw materials: cinnamic acid epoxy resin, polyacrylic acid, water, stabilizer, and defoamer.

[0007] Furthermore, the stabilizer is obtained by weighing 4 parts of tea polyphenols, 5 parts of acetic acid, and 6 parts of brine, mixing them evenly at room temperature, then heating to 60-80°C, adding 6 parts of sodium dichloroisocyanurate and 6 parts of anhydrous sodium metasilicate in sequence, and continuing to stir for 1 hour to obtain the stabilizer.

[0008] Furthermore, the defoaming agent is obtained by uniformly mixing silicon polydimethylsiloxane and modified silicon polydimethylsiloxane in a volume ratio of 1:1 to obtain the defoaming agent.

[0009] Furthermore, the preparation comprises the following steps: adding cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water into a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, N2 The reaction kettle speed is 600rad / min, the temperature of the reactor is adjusted to 120°C, and the reaction is carried out at a constant temperature for 12 hours. After the reaction is completed, the reaction product is obtained by cooling. The prepared stabilizer and defoamer are added to the reaction solution, the reaction kettle speed is 600-800rad / min, the stirring time is 20-30 minutes, and the reaction solution is filtered through a 0.5 micron filter membrane of a filtration device. The filtrate collected is the light-curable aqueous inkjet ink.

[0010] Furthermore, the average molecular weight of the polyacrylic acid is Mw 2000.

[0011] Furthermore, 40-60 parts of cinnamic acid epoxy resin, 40 parts of polyacrylic acid, and 50 parts of water were added to study the effect of the cinnamic acid epoxy resin content on the performance of the synthetic product.

[0012] Furthermore, the preparation process comprises the following steps:

[0013] S1: Weigh 4 parts of tea polyphenols, 5 parts of acetic acid, and 6 parts of brine, mix them evenly at room temperature, then heat to 60-80°C, add 6 parts of sodium dichloroisocyanurate and 6 parts of anhydrous sodium metasilicate in sequence, and continue stirring for 1 hour to obtain a stabilizer;

[0014] S2: Silicon polydimethylsiloxane and modified silicon polydimethylsiloxane are mixed uniformly in a volume ratio of 1:1 to obtain a defoaming agent;

[0015] S3: In a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, add cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water, N 2 The speed of the reactor was 600 rad / min, the temperature of the reactor was adjusted to 120°C, and the reaction was carried out at a constant temperature for 12 hours. After the reaction was completed, the reaction product was obtained by cooling.

[0016] S4: adding the prepared stabilizer and defoamer to the reaction solution, stirring evenly, filtering through a 0.5 micron filter membrane, and collecting the filtrate to obtain the photocurable inkjet ink.

[0017] Furthermore, 40-60 parts of cinnamic acid epoxy resin, 40 parts of polyacrylic acid, 50 parts of water, 7 parts of stabilizer, and 3 parts of defoamer.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The present invention uses epoxy resin as the base resin of photocurable water-based ink, and aims to reduce the system viscosity, increase the curing speed, etc. by changing the formula and components of the photocurable inkjet ink, so as to prepare a high-performance, low-cost and satisfactory ink. The present invention prepares the water-based inkjet ink by mixing cinnamic acid epoxy resin and polyacrylic acid, which can make the ink have good adhesion and hardness.

[0020] 2. The stabilizer composed of camellia polyphenol, acetic acid, salt water, sodium dichloroisocyanurate and anhydrous sodium metasilicate prepared by the present invention plays an important role in the preparation of photocurable inkjet ink, greatly improves the stability of photocurable inkjet ink, can effectively prevent the photocurable inkjet ink from fading and falling off, has strong environmental adaptability, improves the stability of photocurable inkjet ink under different environmental conditions, and greatly improves the comprehensive performance of photocurable inkjet ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The invention discloses a preparation scheme and structure of the cinnamic acid epoxy resin.

[0022] Figure 2 The present invention provides a polymer structure suitable for photocurable aqueous inkjet ink. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are only examples. The photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0024] In the following examples, silicon polydimethylsiloxane and modified silicon polydimethylsiloxane were uniformly mixed in a volume ratio of 1:1 to obtain a defoaming agent.

[0025] In the following examples, 4 parts of tea polyphenols, 5 parts of acetic acid and 6 parts of brine were mixed uniformly at room temperature, then heated to 60-80°C, 6 parts of sodium dichloroisocyanurate and 6 parts of anhydrous sodium metasilicate were added in sequence and stirred for 1 hour to obtain a stabilizer.

[0026] Embodiment 1

[0027] The present invention provides a photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink, comprising the following raw materials in parts by weight:

[0028]

[0029] A process for preparing a cinnamic acid epoxy-polyacrylic acid composite ink for photocurable water-based inkjet comprises the following steps:

[0030] In a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water were added. 2 The reaction kettle speed was 600 rad / min, the temperature of the reactor was adjusted to 120°C, and the reaction was carried out at a constant temperature for 12 hours. After the reaction was completed, the reaction product was obtained by cooling. The prepared stabilizer and defoamer were added to the reaction solution, the reaction kettle speed was 800 rad / min, the stirring time was 30 minutes, and the reaction solution was filtered through a 0.5 micron filter membrane of a filtration device. The filtrate collected was the photocurable inkjet ink.

[0031] Example 2

[0032] The present invention provides a photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink, comprising the following raw materials in parts by weight:

[0033]

[0034] A process for preparing a cinnamic acid epoxy-polyacrylic acid composite ink for photocurable water-based inkjet comprises the following steps:

[0035] In a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water were added. 2 The reaction kettle speed was 600 rad / min, the temperature of the reactor was adjusted to 120°C, and the reaction was carried out at a constant temperature for 12 hours. After the reaction was completed, the reaction product was obtained by cooling. The prepared stabilizer and defoamer were added to the reaction solution, the reaction kettle speed was 800 rad / min, the stirring time was 30 minutes, and the reaction solution was filtered through a 0.5 micron filter membrane of a filtration device. The filtrate collected was the photocurable inkjet ink.

[0036] Example 3

[0037] The present invention provides a photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink, comprising the following raw materials in parts by weight:

[0038]

[0039] A preparation process of a cinnamic acid epoxy-polyacrylic acid composite ink for photocurable water-based inkjet, comprising the following steps:

[0040] In a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water were added. 2The reaction kettle speed was 600 rad / min, the temperature of the reactor was adjusted to 120°C, and the reaction was carried out at a constant temperature for 12 hours. After the reaction was completed, the reaction product was obtained by cooling. The prepared stabilizer and defoamer were added to the reaction solution, the reaction kettle speed was 800 rad / min, the stirring time was 30 minutes, and the reaction solution was filtered through a 0.5 micron filter membrane of a filtration device. The filtrate collected was the photocurable inkjet ink.

[0041] Example 4

[0042] The present invention provides a photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink, comprising the following raw materials in parts by weight:

[0043]

[0044] A preparation process of a cinnamic acid epoxy-polyacrylic acid composite ink for photocurable water-based inkjet, comprising the following steps:

[0045] In a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water were added. 2 The reaction kettle speed was 600 rad / min, the temperature of the reactor was adjusted to 120°C, and the reaction was carried out at a constant temperature for 12 hours. After the reaction was completed, the reaction product was obtained by cooling. The prepared stabilizer and defoamer were added to the reaction solution, the reaction kettle speed was 800 rad / min, the stirring time was 30 minutes, and the reaction solution was filtered through a 0.5 micron filter membrane of a filtration device. The filtrate collected was the photocurable inkjet ink.

[0046] Example 5

[0047] The present invention provides a photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink, comprising the following raw materials in parts by weight:

[0048]

[0049] A preparation process of a cinnamic acid epoxy-polyacrylic acid composite ink for photocurable water-based inkjet, comprising the following steps:

[0050] In a four-necked flask equipped with a stirrer, a condensation reflux device and a thermometer, cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water were added. 2 The reaction kettle speed was 600 rad / min, the temperature of the reactor was adjusted to 120°C, and the reaction was carried out at a constant temperature for 12 hours. After the reaction was completed, the reaction product was obtained by cooling. The prepared stabilizer and defoamer were added to the reaction solution, the reaction kettle speed was 800 rad / min, the stirring time was 30 minutes, and the reaction solution was filtered through a 0.5 micron filter membrane of a filtration device. The filtrate collected was the photocurable inkjet ink.

[0051] To verify the technical effect of the inkjet ink prepared by the present invention, the inkjet inks obtained in Examples 1-5 were respectively subjected to performance tests, the prepared inkjet inks were loaded into a printer cartridge, and printed on ordinary printing paper. The test results are shown in the following table.

[0052] Boiling test: Boil in a constant temperature water bath at 80°C for 90 minutes

[0053] Alcohol wiping resistance: Use alcohol cotton balls to wipe the surface 500 times

[0054] Alkali resistance: Use a cotton ball dipped in 10% sodium hydroxide solution and place it on the surface for 30 minutes;

[0055] Acid resistance: After immersing in 10% hydrochloric acid solution for 24 hours, immerse in deionized water for 10 minutes, take out and dry naturally

[0056] High temperature resistance test: Use a constant temperature oven to bake at 150°C for 90 minutes

[0057] Low temperature resistance test: put the ink into a cold-resistant packaging bottle, place it in a -20℃ low temperature constant temperature box for 24 hours, take it out, return it to room temperature, and test its printing performance

[0058]

[0059] Result analysis: By testing Examples 1-5, Examples 1-5 have excellent performance in resistance to boiling, high temperature, low temperature, alkali, acid and alcohol wiping. This shows that the preparation process of the photocurable water-based inkjet ink of the present invention is very successful, greatly improves the stability of the photocurable water-based inkjet ink, and effectively prevents the fading and shedding of the photocurable inkjet ink, has strong environmental adaptability, improves the stability of the photocurable inkjet ink under different environmental conditions, greatly improves the comprehensive performance of the photocurable water-based inkjet ink, and has a very high market application value.

[0060] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the case of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0061] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photocurable aqueous inkjet cinnamic acid epoxy-polyacrylic acid combination ink, characterized in that: It includes the following raw materials: cinnamic acid epoxy resin, polyacrylic acid, water, stabilizer and defoamer.

2. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: The stabilizer is obtained by weighing 4 parts of tea polyphenols, 5 parts of acetic acid and 6 parts of brine, mixing them evenly at room temperature, then heating to 60-80° C., adding 6 parts of sodium dichloroisocyanurate and 6 parts of anhydrous sodium metasilicate in sequence, and continuing to stir for 1 hour to obtain the stabilizer.

3. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: The defoaming agent is obtained by mixing silicon polydimethylsiloxane and modified silicon polydimethylsiloxane in a volume ratio of 1:1 to obtain the defoaming agent.

4. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: The preparation includes the following implementation steps: adding cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water into a four-necked flask with a stirrer, a condensing reflux device and a thermometer, N2 protection, the speed of the reactor is 600rad / min, the temperature of the reactor is adjusted to 120°C, constant temperature reaction is carried out for 12 hours, and after the reaction is completed, the reaction product is obtained by cooling. The prepared stabilizer and defoamer are added to the reaction solution, the speed of the reactor is 600-800rad / min, the stirring time is 20-30 minutes, and the reaction is filtered through a 0.5 micron filter membrane of a filtration device, and the filtrate is collected to obtain a photocurable aqueous inkjet ink.

5. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: The average molecular weight of polyacrylic acid is Mw 2000.

6. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: 40-60 parts of cinnamic acid epoxy resin, 40 parts of polyacrylic acid, and 50 parts of water. By changing the addition amount of cinnamic acid epoxy resin, the effect of cinnamic acid epoxy resin content on the performance of the synthetic product was studied.

7. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: The preparation process comprises the following steps: S1: Weigh 4 parts of tea polyphenols, 5 parts of acetic acid, and 6 parts of brine, mix them evenly at room temperature, then heat to 60-80°C, add 6 parts of sodium dichloroisocyanurate and 6 parts of anhydrous sodium metasilicate in sequence, and continue stirring for 1 hour to obtain a stabilizer; S2: Silicon polydimethylsiloxane and modified silicon polydimethylsiloxane are mixed uniformly in a volume ratio of 1:1 to obtain a defoaming agent; S3: In a four-necked flask equipped with a stirrer, a condensing reflux device and a thermometer, cinnamic acid epoxy resin, polyacrylic acid and reaction solvent water are added, N2 protection is applied, the speed of the reactor is 600 rad / min, the temperature of the reactor is adjusted to 120°C, and the reaction is carried out at a constant temperature for 12 hours. After the reaction is completed, the reaction product is obtained by cooling; S4: adding the prepared stabilizer and defoamer to the reaction solution, stirring evenly, filtering through a 0.5 micron filter membrane, and collecting the filtrate to obtain the photocurable inkjet ink.

8. The photocurable aqueous inkjet ink of cinnamic acid epoxy-polyacrylic acid combination according to claim 1, characterized in that: 40-60 parts of cinnamic acid epoxy resin, 40 parts of polyacrylic acid, 50 parts of water, 7 parts of stabilizer and 3 parts of defoamer.

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