VOC-free low-color-concentration water-based color ink and preparation method thereof

Abstract

The invention relates to the field of chemical engineering, and discloses a VOC-free low-color-concentration water-based color ink and a preparation method thereof, the VOC-free low-color-concentration water-based color ink is prepared from the following components by weight: 5-10 parts of a pigment, 30-50 parts of a water-based binder, 30-50 parts of a solvent, 1-5 parts of a surfactant, 1-3 parts of a pH regulator, and 2-5 parts of an auxiliary agent, wherein the water-based binder is a copolymer of methacrylate, polymer polyol and vinyl chloride. According to the application, the copolymerof methacrylate, polymer polyol and vinyl chloride is used as the water-based binder, and vinyl chloride is used as an internal crosslinking agent, so that the methacrylate, polymer polyol and vinyl chloride can be effectively promoted to form the water-based binder of the copolymer; the tension among the pigment, the solvent and the resin is adjusted by using the surfactant, so that the tension of each component in the water-based color ink is matched, and the water-based color ink with excellent printing performance is obtained.

Description

technical field

[0001] The invention relates to the field of printing inks, in particular to a VOC-free low color density water-based color ink suitable for high-speed printing and a preparation method thereof. Background technique

[0002] At present, gravure printing is generally printed with organic solvent-based inks, so that the surface of the tipping paper used contains a lot of organic volatile residual substances, such as benzene series, esters, ethers, ketones and other substances. The above substances will contact the human body and produce Certain potential hazards. At the same time, due to the unavoidable volatilization of organic solvents during the printing process using solvent-based inks, a large amount of VOC emissions will be generated to the environment and the surrounding atmosphere, causing certain environmental pollution, and the application of water-based inks can greatly reduce volatile organic solvents. compound release.

[0003] Pigments endow the...

Examples

Embodiment approach 1

[0025] This embodiment provides a VOC-free low color density water-based color ink, which is prepared from the following components by weight:

[0026] Pigment: 5 parts

[0027] Water-based binder: 45 parts

[0028] Mixed solution of alcohol and deionized water with a volume ratio of 1:1: 40 parts

[0029] Surfactant: 3 parts

[0030] Dilute ammonia water with a concentration of 5% g / ml: 2 parts

[0031] Auxiliary: 5 parts

[0032] The above-mentioned water-based binder is a copolymer of 30 parts of methacrylate, 7 parts of polycarbonate diol and 2% of the total mass of all components of the VOC-free low color concentration water-based color ink. Its preparation method is as follows:

[0033] Add 30 parts of methacrylate and 7 parts of polycarbonate diol to the neutralization reaction tank at a temperature of 70-90°C, stir evenly to obtain a neutralization solution, and then add VOC-free low color concentration to the neutralization solution Vinyl chloride with 2% of the ...

Embodiment approach 2

[0040] This embodiment provides a VOC-free low color density water-based color ink, which is prepared from the following components by weight:

[0041] Pigment: 5 parts

[0042] Water-based binder: 45 parts

[0043] Mixed solution of alcohol and deionized water with a volume ratio of 4:1: 30 parts

[0044] Surfactant: 3 parts

[0045] Dilute ammonia water with a concentration of 5% g / ml: 1 part

[0046] Auxiliary: 5 parts

[0047] The above-mentioned water-based binder is a copolymer of 50 parts of methacrylate, 10 parts of polymer polyol and 2% of the total mass of all components of water-based color ink without VOC and low color concentration. Its preparation method is as follows:

[0048] Add 30 parts of methacrylate and 7 parts of polyether glycol to the neutralization reaction tank at a temperature of 70-90 °C, stir evenly to obtain a neutralization solution, and then add VOC-free low color concentration water-based Vinyl chloride with 2% of the total mass of all com...

technical field

[0001] The invention relates to the field of printing inks, in particular to a VOC-free low color density water-based color ink suitable for high-speed printing and a preparation method thereof. Background technique

[0002] At present, gravure printing is generally printed with organic solvent-based inks, so that the surface of the tipping paper used contains a lot of organic volatile residual substances, such as benzene series, esters, ethers, ketones and other substances. The above substances will contact the human body and produce Certain potential hazards. At the same time, due to the unavoidable volatilization of organic solvents during the printing process using solvent-based inks, a large amount of VOC emissions will be generated to the environment and the surrounding atmosphere, causing certain environmental pollution, and the application of water-based inks can greatly reduce volatile organic solvents. compound release.

[0003] Pigments endow the...

Examples

Embodiment approach 1

[0025] This embodiment provides a VOC-free low color density water-based color ink, which is prepared from the following components by weight:

[0026] Pigment: 5 parts

[0027] Water-based binder: 45 parts

[0028] Mixed solution of alcohol and deionized water with a volume ratio of 1:1: 40 parts

[0029] Surfactant: 3 parts

[0030] Dilute ammonia water with a concentration of 5% g / ml: 2 parts

[0031] Auxiliary: 5 parts

[0032] The above-mentioned water-based binder is a copolymer of 30 parts of methacrylate, 7 parts of polycarbonate diol and 2% of the total mass of all components of the VOC-free low color concentration water-based color ink. Its preparation method is as follows:

[0033] Add 30 parts of methacrylate and 7 parts of polycarbonate diol to the neutralization reaction tank at a temperature of 70-90°C, stir evenly to obtain a neutralization solution, and then add VOC-free low color concentration to the neutralization solution Vinyl chloride with 2% of the ...

Embodiment approach 2

[0040] This embodiment provides a VOC-free low color density water-based color ink, which is prepared from the following components by weight:

[0041] Pigment: 5 parts

[0042] Water-based binder: 45 parts

[0043] Mixed solution of alcohol and deionized water with a volume ratio of 4:1: 30 parts

[0044] Surfactant: 3 parts

[0045] Dilute ammonia water with a concentration of 5% g / ml: 1 part

[0046] Auxiliary: 5 parts

[0047] The above-mentioned water-based binder is a copolymer of 50 parts of methacrylate, 10 parts of polymer polyol and 2% of the total mass of all components of water-based color ink without VOC and low color concentration. Its preparation method is as follows:

[0048] Add 30 parts of methacrylate and 7 parts of polyether glycol to the neutralization reaction tank at a temperature of 70-90 °C, stir evenly to obtain a neutralization solution, and then add VOC-free low color concentration water-based Vinyl chloride with 2% of the total mass of all com...