阅读说明：本技术 一种促进uv墨水附着的涂层液及其制备方法 (Coating liquid for promoting UV ink adhesion and preparation method thereof ) 是由 黄健彬 刘明辉 于 2020-04-29 设计创作，主要内容包括：本发明属于材料领域,公开了一种促进UV墨水附着的涂层液,包括单体、附着助剂和溶剂；所述单体为环三羟甲基丙烷甲缩醛丙烯酸酯、四氢呋喃丙烯酸酯、2-苯氧基乙基丙烯酸酯、三甲基环已基丙烯酸酯、聚乙二醇壬基苯基醚丙烯酸酯或乙氧基化三羟甲基丙烷三丙烯酸酯中的至少一种；所述附着助剂为氯化聚丙烯树脂、改性丙烯酸酯或硅烷偶联剂中的至少一种。所述涂层液能够在基材上形成连续附着层,提升UV墨层对特殊基材的附着力；由于不含光引发剂,其稳定性高,不易受到光或热的影响,也不影响UV墨水的稳定性；所述涂层液在涂布后不需要完全干燥,可立即进行UV喷墨打印,操作简单、方便,效率高,且对各类UV喷墨和基材适应性好。(The invention belongs to the field of materials, and discloses a coating liquid for promoting UV ink adhesion, which comprises a monomer, an adhesion auxiliary agent and a solvent; the monomer is at least one of trimethylolpropane formal acrylate, tetrahydrofuran acrylate, 2-phenoxyethyl acrylate, trimethylcyclohexyl acrylate, polyethylene glycol nonyl phenyl ether acrylate or ethoxylated trimethylolpropane triacrylate; the adhesion auxiliary agent is at least one of chlorinated polypropylene resin, modified acrylate or silane coupling agent. The coating liquid can form a continuous adhesion layer on the base material, so that the adhesion of the UV ink layer to the special base material is improved; because the UV ink does not contain a photoinitiator, the UV ink is high in stability, is not easily influenced by light or heat, and does not influence the stability of the UV ink; the coating liquid does not need to be completely dried after being coated, can be immediately subjected to UV ink-jet printing, is simple and convenient to operate, has high efficiency, and has good adaptability to various UV ink-jet inks and base materials.)

1. The coating liquid for promoting the adhesion of the UV ink is characterized by comprising a monomer, an adhesion auxiliary agent and a solvent; the monomer is at least one of trimethylolpropane formal acrylate, tetrahydrofuran acrylate, 2-phenoxyethyl acrylate, trimethylcyclohexyl acrylate, polyethylene glycol nonyl phenyl ether acrylate or ethoxylated trimethylolpropane triacrylate; the adhesion auxiliary agent is at least one of chlorinated polypropylene resin, modified acrylate or silane coupling agent.

2. The coating solution of claim 1, comprising 50-100 parts by mass of a solvent, 3-20 parts by mass of a monomer, and 5-30 parts by mass of an adhesion promoter.

3. The coating solution of claim 2, comprising 70-90 parts by mass of a solvent, 3-15 parts by mass of a monomer, and 5-20 parts by mass of an adhesion promoter.

4. The coating liquid according to claim 1, wherein the modified acrylate is at least one of a modified epoxy acrylate, a modified polyester acrylate, or a phosphoric acid-modified acrylate.

5. The coating solution of claim 1, wherein the silane coupling agent is at least one of vinyltriethoxysilane, vinyltrimethoxysilane, or vinyltris (β -methoxyethoxy) silane.

6. The coating solution according to any one of claims 1 to 3, wherein the solvent has a boiling point of 40 to 150 ℃.

7. The coating solution according to claim 6, wherein the solvent is at least one of ethyl acetate, propyl acetate, ethanol, isopropanol, acetone, methyl ethyl ketone, and propylene glycol methyl ether.

8. The method for preparing a coating liquid according to any one of claims 1 to 7, comprising the steps of:

mixing the monomer, the adhesion auxiliary agent and the solvent, dissolving, filtering, and taking the filtrate to obtain the coating liquid.

9. A UV ink coating comprising the coating liquid according to any one of claims 1 to 7.

10. The UV ink coating according to claim 9, wherein the wet film of the UV ink coating has a thickness of 30-80 um.

Technical Field

The invention belongs to the field of materials, and particularly relates to coating liquid for promoting UV ink adhesion and a preparation method thereof.

Background

With the aging of UV ink jet printing technology and the advantages of low pollution, environmental protection, quick drying and the like of UV ink, various UV inks are presented in the market. The formula of the UV ink follows the smoothness principle of a printer, the problem of smooth printing of the UV ink on the printer is solved, and the requirement of the UV ink on the functionality of printing the UV ink on a substrate is met.

At present, most of UV ink on the market is selective to base materials, especially for base materials which are difficult to adhere, such as glass, metal, ceramic and the like, suitable UV ink is difficult to exist, the UV ink can meet the adhesion force, and the printing smoothness is not good; and the ink with good printing fluency has poor adhesive force. Because of the good adhesion of the materials, the stability of the UV ink may be severely affected and cannot be directly added to the ink formulation.

Therefore, it is desirable to provide a coating solution for promoting adhesion of UV ink, which can effectively combine the substrate and the UV ink layer tightly, and promote adhesion of the UV ink layer to a special substrate, such as glass, metal, ceramic or plastic.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art described above. Therefore, the invention provides the coating liquid for promoting the adhesion of the UV ink, which can effectively and tightly combine the substrate and the UV ink layer and promote the adhesion of the UV ink layer to special substrates such as glass, metal, ceramic or plastic.

A coating liquid for promoting UV ink adhesion comprises a monomer, an adhesion auxiliary agent and a solvent; the adhesion auxiliary agent is at least one of chlorinated polypropylene resin, modified acrylate or silane coupling agent, and the monomer is at least one of cyclotrimethylolpropane methylal acrylate, tetrahydrofuran acrylate, 2-phenoxyethyl acrylate, trimethylcyclohexyl acrylate, polyethylene glycol nonylphenyl ether acrylate or ethoxylated trimethylolpropane triacrylate.

The monomer comprises cyclotrimethylolpropane methylal acrylate, tetrahydrofuran acrylate, 2-phenoxyethyl acrylate, trimethylcyclohexyl acrylate, polyethylene glycol nonylphenyl ether acrylate and ethoxylated trimethylolpropane triacrylate, and the monomer contains a ring or a long chain with an adhesive force structure, has good flexibility, good compatibility with the adhesive auxiliary agent, synergy and strong affinity to a base material; meanwhile, the coating liquid does not affect the stability of the UV ink.

Preferably, the coating liquid comprises, by mass, 50-100 parts of a solvent, 3-20 parts of a monomer and 5-30 parts of an adhesion aid; further preferably, the coating liquid comprises, by mass, 70-90 parts of a solvent, 3-15 parts of a monomer and 5-20 parts of an adhesion aid.

Preferably, the modified acrylate is at least one of modified epoxy acrylate, modified polyester acrylate or phosphoric acid modified acrylate. The adhesion promoter has strong affinity to the base material, and can generate acid-base adsorption, Vanderwatt adsorption, hydrogen bond adsorption or dipole adsorption and the like aiming at the base material. Wherein the phosphoric acid modified acrylate and the silane coupling agent can generate acid-base bonding or adsorption with the alkaline hydroxyl on the surfaces of glass, ceramics or metal and the like; chlorinated polypropylene resin can generate Vanderwatt adsorption on the nonpolar plastic base material; other polar substrates are subjected to dipolar or hydrogen bond adsorption with modified epoxy acrylates or modified polyester acrylates.

More preferably, the silane coupling agent is vinyltriethoxysilane, vinyltrimethoxysilane or vinyltris (β -methoxyethoxy) silane.

Preferably, the boiling point of the solvent is 40-150 ℃; further preferably, the boiling point of the solvent is 50-120 ℃; more preferably, the boiling point of the solvent is 60 to 100 ℃.

Preferably, the solvent is at least one of ethyl acetate, propyl acetate, ethanol, isopropanol, acetone, butanone, or propylene glycol methyl ether. The solvent has proper volatility, good solubility for the monomer and the adhesion auxiliary agent, good compatibility, can be used as a carrier of the monomer and the adhesion auxiliary agent, can wet a substrate and forms a continuous adhesion layer on the substrate; but also can volatilize in the printing process, the function of the coating can not be influenced, and the coating can be adopted to carry out UV ink-jet printing without complete drying after coating.

The invention also provides a preparation method of the UV ink adhesion promoting coating liquid, which comprises the following steps:

mixing the monomer, the adhesion auxiliary agent and the solvent, dissolving, filtering, and taking the filtrate to obtain the coating liquid.

Specifically, the preparation method of the coating liquid comprises the following steps:

pouring the monomer, the attachment auxiliary agent and the solvent into a stirring tank, and stirring until the monomer, the attachment auxiliary agent and the solvent are completely dissolved; then filtering with 1.0 μm glass fiber filter membrane and 0.45 μm PP filter membrane, and taking the filtrate as the coating liquid.

The thickness of the wet film of the UV ink coating is 30-80 um.

Compared with the prior art, the invention has the following beneficial effects:

(1) the coating liquid is prepared from a monomer, an attachment auxiliary agent and a solvent, and the components are simple and easy to obtain; the monomer contains a ring or a long chain with an adhesive force structure, has good flexibility and good compatibility with the adhesive auxiliary agent; the adhesion auxiliary agent has strong affinity to the base material and can generate acid-base adsorption, Vanderwatt adsorption, hydrogen bond adsorption or dipole adsorption and the like aiming at the base material; the UV ink and the UV ink can be synergized, the base material and the UV ink layer are effectively and tightly combined, the adhesive force of the UV ink layer to special base materials such as glass, metal, ceramic or plastic is improved, and the adhesive force of the UV ink on the base materials can reach the level of more than the national standard GB9286 and ISO2409 standard 1.

(2) The coating liquid forms a continuous adhesion layer on a substrate, and the stability of the coating liquid is high due to the fact that no photoinitiator is added, and the coating liquid is not easily affected by light or heat and does not affect the stability of UV ink.

(3) The coating liquid does not need to be completely dried after being coated, can be immediately subjected to UV ink-jet printing, is simple and convenient to operate, has high efficiency, and has good adaptability to various UV ink-jet inks and base materials.

Detailed Description

In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples are given for illustration. It should be noted that the following examples are not intended to limit the scope of the claimed invention.

The starting materials, reagents or apparatuses used in the following examples are conventionally commercially available or can be obtained by conventionally known methods, unless otherwise specified.