阅读说明：本技术 含有耐紫外线颜料的水性油墨组合物及其制备方法和应用 (Water-based ink composition containing ultraviolet-resistant pigment and preparation method and application thereof ) 是由 高延敏 杨红洲 孙存思 *** 张政 施方长 徐俊烽 徐静杰 于 2019-10-16 设计创作，主要内容包括：本发明涉及一种含有耐紫外线颜料的水性油墨组合物及其制备方法。该水性油墨组合物的成分为：水性树脂或乳液35～56％、耐紫外线颜料10～30％、溶剂15～30％、助剂2～5％、填料10～20％；所述耐紫外线颜料的结构为(RO)<Sub>3</Sub>Si-X-Si(OR)<Sub>3</Sub>,X为有机颜料分子,R为1-3原子的烷基。其制备方法包括以下步骤：将有机颜料用醇溶剂溶解后与硅氧烷偶联剂在水热条件下水解凝胶,得到耐紫外线颜料,将其与其他原料混合后研磨,即可得到含有耐紫外线颜料的水性油墨组合物。本发明的含有耐紫外线颜料的水性油墨组合物的耐紫外线照射时间超过500小时,远远超过普通水性油墨组合物的耐紫外线照射时间。(The invention relates to a water-based ink composition containing an ultraviolet-resistant pigment and a preparation method thereof. The components of the water-based ink composition are as follows: 35-56% of water-based resin or emulsion, 10-30% of ultraviolet-resistant pigment, 15-30% of solvent, 2-5% of auxiliary agent and 10-20% of filler; the UV resistant pigment has the structure of (RO) 3 Si‑X‑Si(OR) 3 X is an organic pigment molecule and R is an alkyl group of 1 to 3 atoms. The preparation method comprises the following steps: dissolving an organic pigment in an alcohol solvent, then hydrolyzing the organic pigment with a siloxane coupling agent under a hydrothermal condition to obtain an ultraviolet-resistant pigment, mixing the ultraviolet-resistant pigment with other raw materials, and grinding to obtain the water-based ink composition containing the ultraviolet-resistant pigment. The UV-resistant pigment-containing aqueous ink composition of the present invention has a UV irradiation resistance time of more than 500 hours, far exceeding the UV irradiation resistance of common water-based ink compositions.)

1. The water-based ink composition containing the ultraviolet-resistant pigment is characterized by comprising the following components in percentage by mass: 35-56% of water-based resin or emulsion, 10-30% of ultraviolet-resistant pigment, 15-30% of solvent, 2-5% of auxiliary agent and 10-20% of filler; the UV resistant pigment has the structure of (RO) ₃Si-X-Si(OR) ₃X is an organic pigment molecule and R is an alkyl group of 1 to 3 atoms.

2. The aqueous ink composition containing an ultraviolet-resistant pigment according to claim 1, wherein the organic pigment is any one of pigment red, pigment yellow and pigment blue or a mixture of two or more thereof in an arbitrary mass ratio.

3. The UV-resistant pigment-containing water-based ink composition according to claim 1, wherein the water-based resin or emulsion is one of or a mixture of two or more of water-based acrylic resin, styrene-acrylate copolymer emulsion, water-based polyurethane, water-based polyester resin, water-based alkyd resin, water-based chlorinated polypropylene resin, alkenoic acid ester and methacrylate polymer emulsion in any mass ratio.

4. The aqueous ink composition containing an ultraviolet-resistant pigment according to claim 1, wherein the solvent is water and methyl ethyl ketone, wherein water accounts for 10 to 20% of the total mass of the aqueous ink composition, and methyl ethyl ketone accounts for 5 to 10% of the total mass of the aqueous ink composition.

5. The aqueous ink composition containing an ultraviolet-resistant pigment according to claim 1, wherein the auxiliary agent comprises an antifoaming agent, a wetting agent, a dispersing agent, and a thickener.

6. The aqueous ink composition containing an ultraviolet-resistant pigment according to claim 5, wherein the defoaming agent and the wetting agent are acetylene glycol and account for 1.5% of the total mass of the aqueous ink composition; the dispersant is phosphate ester, which accounts for 0.9 percent of the total mass of the water-based ink composition; the thickener is ethoxylated alcohol and accounts for 0.6 percent of the total mass of the water-based ink composition.

7. The aqueous ink composition containing an ultraviolet-resistant pigment according to claim 1, wherein the filler is any one of clay, montmorillonite, zeolite, and vermiculite, or a mixture of two or more thereof in any mass ratio.

8. The method for preparing an aqueous ink composition containing an ultraviolet-resistant pigment according to any one of claims 1 to 7, comprising the steps of:

(1) dissolving an organic pigment by using alcohol solvent with half of the mass of the organic pigment, uniformly stirring, mixing with a siloxane coupling agent, heating in a water bath at 50-70 ℃ for 1-4 hours while stirring until the end of gel hydrolysis to obtain the ultraviolet-resistant pigment, wherein the molar ratio of the organic pigment to the siloxane coupling agent is 1: 2;

(2) and weighing the ultraviolet-resistant pigment obtained in the last step, the water-based resin or emulsion, the solvent, the auxiliary agent and the filler with the particle size of 0.1-5 microns according to the mass ratio, stirring and mixing, uniformly mixing, and grinding at the rotating speed of 1000-3000 r/min for 2-6 hours to obtain the water-based ink composition containing the ultraviolet-resistant pigment.

9. The use of the aqueous ink composition containing an ultraviolet ray resistant pigment according to any one of claims 1 to 7 for gravure printing.

10. The method of use according to claim 9, wherein the pattern depth of the plate roll is 40 to 50 μm and the printing speed is 50 to 150 m/min.

Technical Field

The invention belongs to the field of water-based ink, and particularly relates to a water-based ink composition containing an ultraviolet-resistant pigment, and a preparation method and application thereof.

Background

With the development of water-based ink, the cooperativity of corresponding materials used together with water-based resin is increasingly emphasized. Among the materials used in aqueous inks, pigment is an important material that cannot be ignored, and is influenced by the pigment and the environment in which it is used, except for the importance of the synergy between the pigment and the resin. Wherein, the ultraviolet ray can cause the fading of the common water-based ink and shorten the service life of the common water-based ink.

Disclosure of Invention

An object of the present invention is to provide an aqueous ink composition containing an ultraviolet-resistant pigment. The specific technical scheme is as follows:

an aqueous ink composition containing an ultraviolet-resistant pigment comprises the following components in percentage by mass: 35-56% of water-based resin or emulsion, 10-30% of ultraviolet-resistant pigment, 15-30% of solvent, 2-5% of auxiliary agent and 10-20% of filler; the UV resistant pigment has the structure of (RO) ₃Si-X-Si(OR) ₃X is an organic pigment molecule and R is an alkyl group of 1 to 3 atoms.

Preferably, the organic pigment is any one of pigment red, pigment yellow and pigment blue or a mixture of two or more of the pigments in any mass ratio.

Preferably, the aqueous resin or emulsion is any one of or a mixture of two or more of aqueous acrylic resin, styrene-acrylate copolymer emulsion, aqueous polyurethane, aqueous polyester resin, aqueous alkyd resin, aqueous chlorinated polypropylene resin, alkenoic acid ester and methacrylate polymer emulsion in any mass ratio.

Preferably, the solvent is water and butanone, wherein the water accounts for 10-20% of the total mass of the water-based ink composition, and the butanone accounts for 5-10% of the total mass of the water-based ink composition.

Preferably, the auxiliary agent comprises a defoaming agent, a wetting agent, a dispersing agent and a thickening agent.

More preferably, the defoaming agent and the wetting agent are acetylene glycol and account for 1.5 percent of the total mass of the water-based ink composition; the dispersant is phosphate ester, which accounts for 0.9 percent of the total mass of the water-based ink composition; the thickener is ethoxylated alcohol and accounts for 0.6 percent of the total mass of the water-based ink composition.

Preferably, the filler is any one of clay, montmorillonite, zeolite and vermiculite or a mixture of two or more of the clay, the montmorillonite, the zeolite and the vermiculite in any mass ratio.

The invention also provides a preparation method of the water-based ink composition containing the ultraviolet-resistant pigment. The specific technical scheme is as follows:

a method for preparing an aqueous ink composition containing an ultraviolet-resistant pigment, comprising the steps of:

(1) dissolving an organic pigment by using alcohol solvent with half of the mass of the organic pigment, uniformly stirring, mixing with a siloxane coupling agent, heating in a water bath at 50-70 ℃ for 1-4 hours while stirring until the end of gel hydrolysis to obtain the ultraviolet-resistant pigment, wherein the molar ratio of the organic pigment to the siloxane coupling agent is 1: 2;

(2) and weighing the ultraviolet-resistant pigment obtained in the last step, the water-based resin or emulsion, the solvent, the auxiliary agent and the filler with the particle size of 0.1-5 microns according to the mass ratio, stirring and mixing, uniformly mixing, and grinding at the rotating speed of 1000-3000 r/min for 2-6 hours to obtain the water-based ink composition containing the ultraviolet-resistant pigment.

The invention also provides application of the water-based ink composition containing the ultraviolet-resistant pigment. The specific technical scheme is as follows:

the water-based ink composition containing the ultraviolet-resistant pigment is applied to gravure printing.

Preferably, the pattern depth of the plate roller is 40-50 μm, and the printing speed is 50-150 m/min.

The technical principle and the synthetic route are as follows:

the invention provides three ultraviolet-resistant pigments of red, yellow and blue, which can be applied to water-based ink to obtain required colors and can be used in high-temperature and ultraviolet environments.

The molecular structure matrix structure of the ultraviolet-resistant inorganic pigment material is divided into two parts, and the structural formula is as follows:

wherein the boxes represent molecules containing organic pigments, R is an alkyl group of 1 to 3 atoms, and the inorganic portion is the product of further hydrolysis of the gel by the siloxane; three basic colors, pigment red 4, pigment yellow 7 and pigment blue 60, are determined by optimization by using molecular shearing and connecting technology, and the three basic pigments are used for preparing the organic-inorganic hybrid pigment with ultraviolet ray resistance.

Preparation method of the ultraviolet-resistant pigment (taking blue pigment as an example):

in the stage 1, pigment blue 60 is used as a raw material and is added into a flask, then a proper amount (50% of the mass of the raw material) of butanol is added to dissolve the raw material, and the mixture is uniformly stirred, wherein the molecular structural formula of the pigment blue 60 is shown as follows:

and 2, adding the uniformly stirred pigment blue 60 and an isocyanate siloxane coupling agent into a flask according to the molar ratio of 1:2, then uniformly stirring and hydrolyzing gel at a constant speed of 200-400 r/min under the heating of a water bath at the temperature of 60-70 ℃, and preparing the organic-inorganic hybrid pigment after two hours, wherein the process is as follows:

the molecular structural formula of the blue ultraviolet-resistant pigment after the final gel hydrolysis is shown as follows:

the hybridization process of pigment red 4 and pigment yellow 7 is similar to that of pigment blue 60, and is not repeated herein, and the molecular structural formula of the red ultraviolet-resistant pigment after pigment red 4 hybridization is shown as follows:

the molecular structural formula of the yellow ultraviolet-resistant pigment hybridized by the pigment yellow 7 is as follows:

has the advantages that:

the invention uses molecular shearing and connecting technology to obtain the ultraviolet-resistant pigment with three primary colors of red, yellow and blue, and the pigment is applied to the water-based ink to obtain the required color and can be used in the environment of high temperature and ultraviolet. The water-based ink composition containing the ultraviolet-resistant pigment has ultraviolet irradiation resistance time of more than 500 hours, and far exceeds the ultraviolet irradiation resistance time (less than 200 hours) of the common water-based ink composition without the ultraviolet-resistant pigment.

Detailed Description

The invention is further illustrated by the following examples, which should not be construed as limiting the invention. Modifications and substitutions to the methods, procedures and conditions of the present invention can be made without departing from the spirit and substance of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.