阅读说明：本技术 用于喷码前基材表面处理的水性白墨及其制备方法 (Water-based white ink for surface treatment of base material before code spraying and preparation method thereof ) 是由 张书林 于 2019-11-12 设计创作，主要内容包括：本发明公开了一种用于喷码前基材表面处理的水性白墨,包括按如下重量配比的组份：水性丙烯酸乳液11-12份；分散剂0.3-0.5份；无机颜料63-65份；水5-10份；助剂25-30份；消泡剂0.1-0.3份；流平剂0.2-0.4份；且所述水性丙烯酸乳液包括按如下重量配比的组份：甲基丙烯酸丁酯25份；苯乙烯40份；丙烯酸丁酯20份；丙烯酸羟丙酯10份；水溶性固体丙烯酸树脂5-15份；阴离子乳化剂0.5-5份；过硫酸胺0.2-1.2份；成膜助剂0.5-5份；消泡剂0.1-1份；氨水4-14份；去离子水40-70份。本发明采用上述结构的用于喷码前基材表面处理的水性白墨,通过将水性丙烯酸乳液作为连结料,可保持涂膜着色性和附着力,从而适用于非极性基材打码区域的表面处理,同时通过水作为溶剂,避免了有害物质的挥发。(The invention discloses a water-based white ink for surface treatment of a base material before code spraying, which comprises the following components in parts by weight: 11-12 parts of water-based acrylic emulsion; 0.3-0.5 part of dispersant; 63-65 parts of inorganic pigment; 5-10 parts of water; 25-30 parts of an auxiliary agent; 0.1-0.3 part of defoaming agent; 0.2-0.4 part of leveling agent; and the water-based acrylic emulsion comprises the following components in parts by weight: 25 parts of butyl methacrylate; 40 parts of styrene; 20 parts of butyl acrylate; 10 parts of hydroxypropyl acrylate; 5-15 parts of water-soluble solid acrylic resin; 0.5-5 parts of anionic emulsifier; 0.2-1.2 parts of ammonium persulfate; 0.5-5 parts of a film-forming assistant; 0.1-1 part of defoaming agent; 4-14 parts of ammonia water; 40-70 parts of deionized water. According to the water-based white ink for surface treatment of the base material before code spraying, which adopts the structure, the water-based acrylic emulsion is used as a connecting material, so that the colorability and the adhesive force of a coating film can be kept, the water-based white ink is suitable for surface treatment of a code printing area of a nonpolar base material, and meanwhile, the volatilization of harmful substances is avoided by using water as a solvent.)

1. A water-based white ink for surface treatment of a base material before code spraying is characterized in that: comprises the following components in parts by weight:

11-12 parts of water-based acrylic emulsion; 0.3-0.5 part of dispersant; 63-65 parts of inorganic pigment; 5-10 parts of water; 25-30 parts of an auxiliary agent; 0.1-0.3 part of defoaming agent; 0.2-0.4 part of leveling agent;

the water-based acrylic emulsion comprises the following components in parts by weight:

25 parts of butyl methacrylate; 40 parts of styrene; 20 parts of butyl acrylate; 10 parts of hydroxypropyl acrylate; 5-15 parts of water-soluble solid acrylic resin; 0.5-5 parts of anionic emulsifier; 0.2-1.2 parts of ammonium persulfate; 0.5-5 parts of a film-forming assistant; 0.1-1 part of defoaming agent; 4-14 parts of ammonia water; 40-70 parts of deionized water.

2. The aqueous white ink for substrate surface treatment before code spraying according to claim 1, characterized in that: the mass concentration of the ammonia water is 28%.

3. The aqueous white ink for substrate surface treatment before code spraying according to claim 1, characterized in that: the dispersing agent is edible alcohol with the concentration of 95%.

4. The aqueous white ink for substrate surface treatment before code spraying according to claim 1, characterized in that: the inorganic pigment is titanium dioxide.

5. A method for preparing the aqueous white ink for the surface treatment of a substrate before code spraying according to any one of the claims 1 to 4, characterized in that: the method comprises the following steps:

s1 preparation of aqueous acrylic emulsion

S10, mixing 25 parts of butyl methacrylate, 40 parts of styrene, 20 parts of butyl acrylate and 10 parts of hydroxypropyl acrylate according to parts by weight, and polymerizing to form a high molecular substance to obtain a water-based acrylic emulsion main body;

s11, adding 5-15 parts of water-soluble solid acrylic resin, 0.5-5 parts of anionic emulsifier, 0.5-5 parts of film-forming assistant, 0.1-1 part of defoaming agent and 40-70 parts of deionized water into the water-based acrylic emulsion main body prepared in the step S10, stirring and heating, adding 0.2-1.2 parts of ammonium persulfate in three times, controlling the temperature to be between 120 ℃ and 130 ℃, carrying out reflux polymerization for 3-4 hours, controlling the viscosity to be between 18000 ℃ and 20000 centipoises/25 ℃, then adding 4-14 parts of 28% ammonia water for neutralization, and finally adding water for dilution until the solid content is 40-42% to obtain the water-based acrylic emulsion;

s2 preparation of water-based ink

And (2) sequentially weighing 11-12 parts of the water-based acrylic emulsion prepared in the step S1, 03-0.5 part of a dispersing agent, 63-65 parts of an inorganic pigment, 5-10 parts of water, 25-30 parts of an auxiliary agent, 0.1-0.3 part of a defoaming agent and 0.2-0.4 part of a flatting agent, and stirring to prepare the water-based ink.

Technical Field

The invention relates to an ink technology, in particular to a water-based white ink for surface treatment of a base material before code spraying and a preparation method thereof.

Background

The water-based code spraying ink has stable ink property, is not easy to burn and has bright color, and the water-based code spraying ink is prepared from water-based resin, is soluble in water, can be diluted by water and does not need an organic solvent, so that the problems of air pollution and damage to the body health of workers caused by solvent volatilization can be avoided, and the water-based code spraying ink belongs to environment-friendly ink. Meanwhile, the ink is low in price, is suitable for spraying codes on the surfaces of absorbent materials such as cartons and wood (because the material can absorb moisture, the 'adhesive force' of the ink is formed), and has good adhesive force after printing, quick drying and strong water resistance. The method is generally used in industries such as food, medicine and beverage, and the packaging printed matter industry is widely applied.

However, the conventional aqueous ink has poor adhesion to non-absorbent substrates and causes uneven printing on non-absorbent substrates and highly demanded absorbent substrates due to high surface tension of water. Particularly, with the development of commodity logistics, the two-dimensional code is widely used for commodity packaging, logistics tracking, preferential promotion and member management. The information carried on the two-dimensional code is more and more, and the recognition and the reading of the two-dimensional code become more and more important. The two-dimensional code printing generally uses water-based ink, and the printing is generally uneven on non-absorbent substrates and high-requirement absorbent substrates, so that the two-dimensional code cannot be read or is diverged.

Disclosure of Invention

The invention aims to provide the water-based white ink for surface treatment of the base material before code spraying, which can keep the coloring property and the adhesive force of a coating film by using the water-based acrylic emulsion as a binder, thereby being suitable for surface treatment of a code spraying area of a non-polar base material, and simultaneously, the volatilization of harmful substances is avoided by using water as a solvent.

In order to achieve the aim, the invention provides aqueous white ink for surface treatment of a base material before code spraying, which comprises the following components in parts by weight:

11-12 parts of water-based acrylic emulsion; 0.3-0.5 part of dispersant; 63-65 parts of inorganic pigment; 5-10 parts of water; 25-30 parts of an auxiliary agent; 0.1-0.3 part of defoaming agent; 0.2-0.4 part of leveling agent;

the water-based acrylic emulsion comprises the following components in parts by weight:

25 parts of butyl methacrylate; 40 parts of styrene; 20 parts of butyl acrylate; 10 parts of hydroxypropyl acrylate; 5-15 parts of water-soluble solid acrylic resin; 0.5-5 parts of anionic emulsifier; 0.2-1.2 parts of ammonium persulfate; 0.5-5 parts of a film-forming assistant; 0.1-1 part of defoaming agent; 4-14 parts of ammonia water; 40-70 parts of deionized water.

Preferably, the mass concentration of the ammonia water is 28%.

Preferably, the dispersing agent is edible alcohol with the concentration of 95%.

Preferably, the inorganic pigment is titanium dioxide.

The preparation method of the water-based white ink for the surface treatment of the base material before code spraying comprises the following steps:

s1 preparation of aqueous acrylic emulsion

S10, mixing 25 parts of butyl methacrylate, 40 parts of styrene, 20 parts of butyl acrylate and 10 parts of hydroxypropyl acrylate according to parts by weight, and polymerizing to form a high molecular substance to obtain a water-based acrylic emulsion main body;

s11, adding 5-15 parts of water-soluble solid acrylic resin, 0.5-5 parts of anionic emulsifier, 0.5-5 parts of film-forming assistant, 0.1-1 part of defoaming agent and 40-70 parts of deionized water into the water-based acrylic emulsion main body prepared in the step S10, stirring and heating, adding 0.2-1.2 parts of ammonium persulfate in three times, controlling the temperature to be between 120 ℃ and 130 ℃, carrying out reflux polymerization for 3-4 hours, controlling the viscosity to be between 18000 ℃ and 20000 centipoises/25 ℃, then adding 4-14 parts of 28% ammonia water for neutralization, and finally adding water for dilution until the solid content is 40-42% to obtain the water-based acrylic emulsion;

s2 preparation of water-based ink

And (2) sequentially weighing 11-12 parts of the water-based acrylic emulsion prepared in the step S1, 03-0.5 part of a dispersing agent, 63-65 parts of an inorganic pigment, 5-10 parts of water, 25-30 parts of an auxiliary agent, 0.1-0.3 part of a defoaming agent and 0.2-0.4 part of a flatting agent, and stirring to prepare the water-based ink.

The invention has the following beneficial effects:

1. better adhesive force is provided for the code spraying ink on different base materials;

2. the printing ink takes water as a solvent, does not contain harmful substances such as benzene series, esters, ethers, ketones and the like, reduces the solvent residue on the surface of a printed matter, avoids the damage to the health of a user, reduces the emission of the operating environment of a printer and the surrounding atmosphere V0C, avoids the damage to the health of production personnel and the user, and reduces the pollution to the environment.

The technical solution of the present invention is further described in detail by the following examples.

Detailed Description

The present invention will be further described below, and it should be noted that the present embodiment is based on the technical solution, and a detailed implementation manner and a specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.

The structure of the invention comprises the following components by weight:

11-12 parts of water-based acrylic emulsion; 0.3-0.5 part of dispersant; 63-65 parts of inorganic pigment; 5-10 parts of water; 25-30 parts of an auxiliary agent; 0.1-0.3 part of defoaming agent; 0.2-0.4 part of leveling agent;

the water-based acrylic emulsion comprises the following components in parts by weight:

25 parts of butyl methacrylate; 40 parts of styrene; 20 parts of butyl acrylate; 10 parts of hydroxypropyl acrylate; 5-15 parts of water-soluble solid acrylic resin; 0.5-5 parts of anionic emulsifier; 0.2-1.2 parts of ammonium persulfate; 0.5-5 parts of a film-forming assistant; 0.1-1 part of defoaming agent; 4-14 parts of ammonia water; 40-70 parts of deionized water.

Wherein the mass concentration of the ammonia water is 28%. The dispersing agent is edible alcohol with the concentration of 95%. The inorganic pigment is titanium dioxide.

The preparation method of the water-based white ink for the surface treatment of the base material before code spraying comprises the following steps:

s1 preparation of aqueous acrylic emulsion

S10, mixing 25 parts of butyl methacrylate, 40 parts of styrene, 20 parts of butyl acrylate and 10 parts of hydroxypropyl acrylate according to parts by weight, and polymerizing to form a high molecular substance to obtain a water-based acrylic emulsion main body;

s11, adding 5-15 parts of water-soluble solid acrylic resin, 0.5-5 parts of anionic emulsifier, 0.5-5 parts of film-forming assistant, 0.1-1 part of defoaming agent and 40-70 parts of deionized water into the water-based acrylic emulsion main body prepared in the step S10, stirring and heating, adding 0.2-1.2 parts of ammonium persulfate in three times, controlling the temperature to be between 120 ℃ and 130 ℃, carrying out reflux polymerization for 3-4 hours, controlling the viscosity to be between 18000 ℃ and 20000 centipoises/25 ℃, then adding 4-14 parts of 28% ammonia water for neutralization, and finally adding water for dilution until the solid content is 40-42% to obtain the water-based acrylic emulsion;

s2 preparation of water-based ink

And (2) sequentially weighing 11-12 parts of the water-based acrylic emulsion prepared in the step S1, 03-0.5 part of a dispersing agent, 63-65 parts of an inorganic pigment, 5-10 parts of water, 25-30 parts of an auxiliary agent, 0.1-0.3 part of a defoaming agent and 0.2-0.4 part of a flatting agent, and stirring to prepare the water-based ink.

Therefore, the water-based white ink for surface treatment of the base material before code spraying, which adopts the structure, can keep the coloring property and the adhesive force of a coating film by taking the water-based acrylic emulsion as a binder, thereby being suitable for surface treatment of a code spraying area of a non-polar base material, and simultaneously avoiding the volatilization of harmful substances by taking water as a solvent.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.