阅读说明：本技术 一种用于水性油墨的蓝色颜料及其制备方法 (Blue pigment for water-based ink and preparation method thereof ) 是由 高延敏 陈佳铭 朱裕祥 于 2019-12-10 设计创作，主要内容包括：本发明公开了一种用于水性油墨的蓝色颜料及其制备方法。该蓝色颜料由酞菁蓝和包覆材料按照质量比15～25:1组成。其制备方法：将氯化聚烯烃、马来酸酐和对苯二胺按照质量比5～8:1.5～2:1混合均匀后,加热到100～110℃,边加热边搅拌,反应3～5小时后冷却即可得到所述包覆材料；将得到的包覆材料与酞菁蓝按照质量比15～25:1混合,然后120～140℃温度下挤出,即可得到所述蓝色颜料。该蓝色颜料应用于水性油墨,可使其具有良好的分散性、调色准确性、粘结性、亲水性,不易团聚沉淀,从而具有良好的出墨稳定性和颜色均匀性。(The invention discloses a blue pigment for water-based ink and a preparation method thereof. The blue pigment is composed of phthalocyanine blue and a coating material according to a mass ratio of 15-25: 1. The preparation method comprises the following steps: uniformly mixing chlorinated polyolefin, maleic anhydride and p-phenylenediamine according to a mass ratio of 5-8: 1.5-2: 1, heating to 100-110 ℃, stirring while heating, reacting for 3-5 hours, and cooling to obtain the coating material; mixing the obtained coating material with phthalocyanine blue according to a mass ratio of 15-25: 1, and then extruding at 120-140 ℃ to obtain the blue pigment. The blue pigment is applied to water-based ink, has good dispersibility, toning accuracy, cohesiveness and hydrophilicity, is not easy to agglomerate and precipitate, and has good ink output stability and color uniformity.)

1. The blue pigment for the water-based ink is characterized by consisting of phthalocyanine blue and a coating material coated on the surface of the phthalocyanine blue, wherein the mass ratio of the phthalocyanine blue to the coating material is 15-25: 1, and the structural formula of the coating material is as follows:

2. the blue pigment for aqueous ink according to claim 1, wherein the molecular weight of the coating material is 30 to 40 ten thousand.

3. A method for preparing a blue pigment for an aqueous ink according to claim 1 or 2, comprising the steps of: weighing chlorinated polyolefin, p-phenylenediamine and maleic anhydride, uniformly mixing, heating to 100-110 ℃, stirring while heating, wherein the stirring speed is 200-500 r/min, reacting for 3-5 hours, and cooling to obtain the coating material, wherein the mass ratio of the chlorinated polyolefin, the maleic anhydride and the p-phenylenediamine is 5-8: 1.5-2: 1; mixing the obtained coating material with phthalocyanine blue according to a mass ratio of 15-25: 1, and then extruding at 120-140 ℃ to obtain the blue pigment.

4. The method for preparing a blue pigment for aqueous ink according to claim 3, wherein the chlorinated polyolefin has a chlorine content of 20 to 30%.

5. The method for producing a blue pigment for aqueous ink according to claim 3, wherein the particle diameter of the blue pigment is 0.5 to 5 μm.

6. A method of using the blue pigment for aqueous ink according to claim 1 or 2, characterized by the steps of: mixing and stirring the blue pigment and the binder according to the mass ratio of 5-10: 1 to form slurry, and grinding for 1-5 hours to obtain the suspended colloidal water-based ink; the vehicle is a mixture of a resin powder mixture and an environment-friendly solvent mixture, and the mixing mass ratio of the vehicle to the environment-friendly solvent mixture is as follows: an environmentally friendly solvent mixture of 3: 2; the resin powder mixture is a mixture of polyester powder and phenolic resin powder mixed according to a mass ratio of 10:1, and the environment-friendly solvent mixture is a mixture of dimethyl succinate, methyl hydroxypropionate, butanol and ethanol mixed according to a mass ratio of 10:2.5:0.5: 3.

Technical Field

The invention belongs to the field of ink pigments, and relates to a water-based ink blue pigment, and a preparation method and application thereof.

Background

The PVC color film is an important decorative material and is widely applied to the fields of wallpaper, floors and high-grade decoration. Besides printing on the base material, the PVC color film is also provided with a layer of film on the color film printed with the printing ink. In the printing process of a PVC color film, the color film with patterns is required to be printed accurately and perfectly, and the color film with patterns can have good adhesion with an upper-layer film after the color film patterns are printed, so that in the design process of the printing ink, on one hand, the combination of the printing ink and a PVC base material is considered, and on the other hand, the color film printed with the printing ink and the upper-layer film have good adhesion; on the other hand, the color composition is required to have adjustability with other colors and good dispersibility.

The phthalocyanine blue pigment is one of the three primary colors of the ink, is a basic original substance for adjusting the color tone, but is limited by the binding force with PVC and the hydrophilicity in an aqueous system and a PVC system, if the hydrophilicity is too good, the binding force with PVC is poor, if the binding force with PVC is too good, the hydrophilicity is also deteriorated, and if the phthalocyanine blue pigment can not only keep the binding force with PVC, but also keep certain hydrophilicity, the phthalocyanine blue pigment is a very challenging technical problem.

The ink is divided into water-based ink and oil-based ink, the combination of the oil-based ink and a film is better, the color matching accuracy is higher, but the ink adopts an organic solvent and has serious environmental pollution. With the improvement of environmental requirements, the PVC ink also gradually requires water-based ink, and in the water-based ink, the edges of pigment distribution color points in the water-based ink become irregular, the edges of printed ink points are irregular, even a bleeding phenomenon occurs, and the color mixing accuracy is influenced. This is because the binder of the aqueous ink contains many hydrophilic groups, which results in poor pigment compatibility with the raw materials, and tends to cause agglomeration during the pigment dispersion process, resulting in uneven color point mixing of the ink, resulting in poor image quality of the printed product, and poor quality of the printed product of the aqueous ink.

In the preparation of water-based ink, phthalocyanine blue is a main variety for preparing blue pigment in three primary colors, has the characteristics of bright color, strong tinting strength, stable performance, light and heat resistance, good solvent resistance and the like, is widely applied to the industries of coatings, ink and the like, but is insoluble in water, poor in dispersibility, inaccurate in color matching, poor in adhesive force, extremely poor in hydrophilicity and capable of generating an adhesive agglomeration phenomenon.

Disclosure of Invention

One of the objects of the present invention is to provide a blue pigment for aqueous inks. The specific technical scheme is as follows:

the blue pigment for the water-based ink is composed of phthalocyanine blue and a coating material coated on the surface of the phthalocyanine blue, the mass ratio of the phthalocyanine blue to the coating material is 15-25: 1, and the structural formula of the coating material is as follows:

preferably, the molecular weight of the coating material is 30 to 40 ten thousand.

The invention also aims to provide a preparation method of the blue pigment for the water-based ink. The specific technical scheme is as follows:

a method for preparing a blue pigment for an aqueous ink, comprising the steps of: weighing chlorinated polyolefin, p-phenylenediamine and maleic anhydride, uniformly mixing, heating to 100-110 ℃, stirring while heating, wherein the stirring speed is 200-500 r/min, reacting for 3-5 hours, and cooling to obtain the coating material, wherein the mass ratio of the chlorinated polyolefin, the maleic anhydride and the p-phenylenediamine is 5-8: 1.5-2: 1; mixing the obtained coating material with phthalocyanine blue according to a mass ratio of 15-25: 1, and then extruding at 120-140 ℃ to obtain the blue pigment.

Preferably, the chlorine content of the chlorinated polyolefin is 20-30%.

Preferably, the particle size of the blue pigment is 0.5 to 5 μm.

It is a further object of the present invention to provide a method of using the blue pigment for aqueous inks. The specific technical scheme is as follows:

a method for using a blue pigment for water-based ink comprises the following steps: mixing and stirring the blue pigment and the binder according to the mass ratio of 5-10: 1 to form slurry, and grinding for 1-5 hours to obtain the suspended colloidal water-based ink; the vehicle is a mixture of a resin powder mixture and an environment-friendly solvent mixture, and the mixing mass ratio of the vehicle to the environment-friendly solvent mixture is as follows: an environmentally friendly solvent mixture of 3: 2; the resin powder mixture is a mixture of polyester powder and phenolic resin powder mixed according to a mass ratio of 10:1, and the environment-friendly solvent mixture is a mixture of dimethyl succinate, methyl hydroxypropionate, butanol and ethanol mixed according to a mass ratio of 10:2.5:0.5: 3.

The invention has the beneficial effects that:

the phthalocyanine blue has low surface polarity, is not easy to be bonded with a common dispersant, and can cause the system ions to agglomerate and precipitate. The modified blue pigment of the water-based ink is applied to the water-based ink, has good dispersibility, toning accuracy, cohesiveness and hydrophilicity, is not easy to agglomerate and precipitate, and has good ink output stability and color uniformity. The water-based ink is used for a PVC color film, and can solve the problems of poor pigment dispersibility and compatibility of common phthalocyanine blue pigment in PVC water-based ink and poor bonding force with a PVC base material and a coated film, so that the printed color accuracy and the bonding force tear resistance achieve better effects.

Detailed Description