阅读说明：本技术 一种高附着性uv墨水及其制备方法 (High-adhesion UV ink and preparation method thereof ) 是由 涂乐平 涂六伟 于 2021-08-30 设计创作，主要内容包括：本申请涉及UV墨水的技术领域,具体公开了一种高附着性UV墨水及其制备方法。该高附着性UV墨水包括色浆和稀释剂,按重量份数：色浆包括有以下组分：CTFA 4.5～5.5份；分散剂1～4份；颜料3～10份；稀释剂包括有以下组分：表面活性剂0.5～1.5份；树脂15～25份；PHEA 15～25份；HDDA 43～48.6份。该高附着性UV墨水的制备方法包括有以下步骤：将CTFA与分散剂混合,然后加入颜料制成色浆；将色浆进行研磨；向研磨后的色浆中加入表面活性剂、PHEA、HDDA和树脂,混合均匀,过滤,得到UV墨水。本申请的高附着性UV墨水在PET、玻璃等非吸收性的承印物上表现出了优异的附着性能。(The application relates to the technical field of UV ink, and particularly discloses high-adhesiveness UV ink and a preparation method thereof. The high-adhesion UV ink comprises color paste and a diluent, and is prepared from the following components in parts by weight: the color paste comprises the following components: 4.5-5.5 parts of CTFA; 1-4 parts of a dispersing agent; 3-10 parts of pigment; the diluent comprises the following components: 0.5-1.5 parts of a surfactant; 15-25 parts of resin; 15-25 parts of PHEA; 43-48.6 parts of HDDA. The preparation method of the high-adhesion UV ink comprises the following steps: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste; grinding the color paste; and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the UV ink. The high-adhesion UV ink shows excellent adhesion performance on nonabsorbable printing materials such as PET, glass and the like.)

1. The high-adhesion UV ink is characterized by comprising color paste and a diluent in parts by weight:

the color paste comprises the following components:

4.5-5.5 parts of CTFA;

1-4 parts of a dispersing agent;

3-10 parts of pigment;

the diluent comprises the following components:

0.5-1.5 parts of a surfactant;

15-25 parts of resin;

15-25 parts of PHEA;

43-48.6 parts of HDDA.

2. The high adhesion UV ink of claim 1, wherein: the weight ratio of PHEA to HDDA is 1 (2.1-2.3).

3. The high adhesion UV ink of claim 1, wherein: the resin is polyurethane acrylate, novolac epoxy resin and organic silicon resin, and the weight ratio of the polyurethane acrylate to the novolac epoxy resin to the organic silicon resin is 1 (0.4-0.7) to 0.1-0.3.

4. The high adhesion UV ink of claim 1, wherein: the dispersant is selected from one or more of Solsperse24000, Solsperse35000 and SolsperseJ 200.

5. The high adhesion UV ink of claim 1, wherein: the surfactant is selected from one or more of YK378 and BYK-161.

6. A method for preparing the high-adhesion UV ink as claimed in any one of claims 1 to 5, wherein: the method comprises the following steps:

preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

grinding color paste: grinding the color paste;

preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink.

7. The method for preparing the high-adhesion UV ink according to claim 6, wherein: in the color paste grinding step, the particle size of the ground color paste is 100-300 nm.

8. The method for preparing the high-adhesion UV ink according to claim 6, wherein: in the step of preparing the UV ink, the filtering precision is 1-3 um.

Technical Field

The present application relates to the field of UV inks, and more particularly, it relates to a high adhesion UV ink and a method for preparing the same.

Background

UV inks are UV curable inks. Since the UV ink does not contain a volatile solvent, cannot be dried before being irradiated by ultraviolet light, and can be quickly dried after being irradiated by the ultraviolet light, the UV ink has the characteristics of environmental protection, high stability, quick drying and the like, is popular in the market, and has an increasing market share in the ink-jet printing ink industry year by year.

In terms of composition, UV inks typically include components such as pigments, resins, photo-curing agents, and other adjuvants. When the UV ink is used, the UV ink is printed on a printing stock in an ink-jet printing mode, then the UV ink is irradiated by ultraviolet light, and under the action of a light curing agent, the UV ink can be rapidly cured and molded.

The printing stock to be printed comprises non-absorbent materials such as PET, glass, metal and the like besides common paperboards and paper. However, the adhesion performance of the existing UV ink on the non-absorbent printing material is poor, and after curing, the ink layer formed by the UV ink is not wear-resistant and is easy to fall off, so that improvement is urgently needed.

Disclosure of Invention

In order to improve the adhesion performance of the UV ink on a non-absorbent printing stock, the application provides the high-adhesion UV ink and the preparation method thereof.

The high-adhesiveness UV ink and the preparation method thereof adopt the following technical scheme:

in a first aspect, the present application provides a high adhesion UV ink, which adopts the following technical scheme:

the high-adhesion UV ink comprises color paste and a diluent, and comprises the following components in parts by weight:

the color paste comprises the following components:

4.5-5.5 parts of CTFA;

1-4 parts of a dispersing agent;

3-10 parts of pigment;

the diluent comprises the following components:

by adopting the technical scheme, the UV ink with higher adhesive property can be obtained, and experiments show that compared with the same type of UV ink sold in the market at present, the UV ink has more excellent adhesive property on materials such as PET (polyethylene terephthalate), glass and the like. After the printing stock coated with the UV ink is treated in boiling water, the UV ink still has excellent adhesion performance, so that the application range of the UV ink is greatly widened, and the UV ink has high market value. This characteristic of the UV ink of the present application reflects the superior complexing effect between the above formulation components of the present application.

Optionally, the weight ratio of PHEA to HDDA is 1 (2.1-2.3).

Experimental data show that the proportion of the two components PHEA and HDDA has a large influence on the adhesion performance of the UV ink based on the formula system, and when the weight ratio of PHEA to HDDA is 1 (2.1-2.3), the adhesion performance of the formula system is more excellent.

Optionally, the resin is polyurethane acrylate, novolac epoxy resin and organic silicon resin, and the weight ratio of the polyurethane acrylate to the novolac epoxy resin to the organic silicon resin is 1 (0.4-0.7) to 0.1-0.3.

Experiments show that the formula system is suitable for various resins, and when the resin adopts urethane acrylate, novolac epoxy resin and organic silicon resin, and the weight ratio of the urethane acrylate, the novolac epoxy resin and the organic silicon resin is 1 (0.1-0.3) to (0.4-0.7), the adhesion performance of the formula system is better. This demonstrates the synergy between the urethane acrylate, novolac epoxy and silicone resins for the UV ink formulation system of the present application.

Optionally, the dispersant is selected from one or more of Solsperse24000, Solsperse35000 and SolsperseJ 200.

Dispersants have an important role in maintaining the stability of the above-mentioned formulation systems, especially the dispersion stability of pigments. Experiments show that the dispersant of the type is suitable for the formula system of the application, and the formula system of the application is stable for a long time by being matched with other components, and the phenomena of flocculation, precipitation and the like can not occur within at least one year.

Optionally, the surfactant is selected from one or more of YK378 and BYK-161.

The surfactant has an important influence on the surface tension of a UV ink formula system, and experiments show that the surfactant is suitable for the formula system of the application, and the surfactant is matched with other components, so that the surface tension of the formula system of the application is maintained at about 25dyn/cm, and the surfactant is suitable for the requirement of ink-jet dynes.

In a second aspect, the present application provides a method for preparing the above high adhesion UV ink, which adopts the following technical scheme:

the preparation method of the high-adhesion UV ink comprises the following steps:

preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

grinding color paste: grinding the color paste;

preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink.

By adopting the technical scheme, the dispersing agent is added in the preparation process of the color paste, and the dispersing agent and the pigment can be fully and uniformly mixed through grinding, so that the stability of the whole UV ink formula system is favorably improved.

Optionally, in the color paste grinding step, the particle size of the ground color paste is 100-300 nm.

The particle size of the milled color paste has certain influence on the stability of the whole formula system, and by adopting the technical scheme, the particle size of the milled color paste is further limited, so that the stability of the UV ink formula system is further ensured.

Optionally, in the step of preparing the UV ink, the filtering precision is 1-3 um.

By adopting the technical scheme, the stability of the UV ink formula system can be further ensured, the probability of flocculation and precipitation of the UV ink is further reduced, and the stability of the UV ink in the ink-jet printing process is ensured.

In summary, the present application has the following beneficial effects:

1. the UV ink system is reasonable in proportion, and shows excellent adhesion performance on non-absorbent printing stocks such as PET (polyethylene terephthalate), glass and the like, and after the printing stocks coated with the UV ink are treated in boiling water, the evaluation level of the adhesion performance of the UV ink can still reach 0 level, so that the application range of the UV ink is greatly expanded, and the UV ink has high market value;

2. research of the application shows that aiming at the UV ink formula system, the weight ratio of PHEA to HDDA and the weight ratio of urethane acrylate, novolac epoxy resin and organic silicon resin all have important influence on the adhesion performance of the system, and the adhesion performance of the system can be further improved;

3. the formula system has good dispersion stability, does not cause flocculation, precipitation and other phenomena within at least one year, and can effectively prevent the condition that the spray head is blocked during ink-jet printing.

Detailed Description

The present application is described in further detail below.

Introduction of raw materials

The following description is made for the raw materials used in the following examples 1 to 12 and comparative examples 1 to 3:

CTFA: namely, cyclic trimethylolpropane formal acrylate;

PHEA: namely 2-phenoxyethyl acrylate;

HDDA: i.e., 1, 6-hexanediol diacrylate;

pigment: adopting Pigment Yellow 1, Pigment Red 22, Pigment Blue 15, Pigment Black 7 and Pigment White 6;

dispersing agent: adopting Solsperse24000, Solsperse35000 and solsperseJ 200;

surfactants, YK378, BYK-161;

polyester acrylate: SM6402 polyester acrylate is adopted, the functionality is 2, and the viscosity is 10000-20000CPS @25 ℃;

urethane acrylate: adopting DH-317 polyurethane acrylate prepolymer, the functionality is 3, the viscosity is 2000-8000cps @25 ℃;

phenolic epoxy resin: phenolic epoxy resin 634 is adopted, and the epoxy value is 0.25-0.45;

silicone resin: silicone resin MSE100 was used.

Examples

Example 1

A high-adhesion UV ink comprises color paste and a diluent:

the color paste comprises the following components:

CTFA 5.5kg；

3.2kg of dispersing agent;

4kg of pigment;

the diluent comprises the following components:

wherein the content of the first and second substances,

the dispersing agent adopts Solsperse 24000;

pigment is Pigment Yellow 1;

the surfactant adopts YK 378;

the resin is polyester acrylate;

the preparation method of the high-adhesion UV ink comprises the following steps:

(1) preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

(2) grinding color paste: grinding color paste, wherein the particle size of the ground color paste is 50-100 nm;

(3) preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink, wherein the filtering precision is 5-10 microns.

Example 2

A high-adhesion UV ink comprises color paste and a diluent:

the color paste comprises the following components:

CTFA 4.5kg；

2.4kg of dispersing agent;

3kg of pigment;

the diluent comprises the following components:

wherein the content of the first and second substances,

the dispersant adopts Solsperse 35000;

pigment is Pigment Red 22;

the surfactant adopts BYK-161;

the resin is polyurethane acrylate;

the preparation method of the high-adhesion UV ink comprises the following steps:

(1) preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

(2) grinding color paste: grinding color paste, wherein the particle size of the ground color paste is 300-400 nm;

(3) preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink, wherein the filtering precision is 10-20 microns.

Example 3

A high-adhesion UV ink comprises color paste and a diluent:

the color paste comprises the following components:

CTFA 5kg；

2.4kg of dispersing agent;

3kg of pigment;

the diluent comprises the following components:

wherein the content of the first and second substances,

the dispersing agent adopts SolsperseJ 200;

pigment is Pigment Blue 15;

the surfactant adopts BYK-161;

the resin is phenolic epoxy resin;

the preparation method of the high-adhesion UV ink comprises the following steps:

(1) preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

(2) grinding color paste: grinding color paste, wherein the particle size of the ground color paste is 50-100 nm;

(3) preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink, wherein the filtering precision is 20-30 microns.

Example 4

A high-adhesion UV ink comprises color paste and a diluent:

the color paste comprises the following components:

CTFA 5kg；

1kg of dispersing agent;

10kg of pigment;

the diluent comprises the following components:

wherein the content of the first and second substances,

the dispersing agent adopts SolsperseJ 200;

pigment is Pigment White 6;

the surfactant adopts BYK-161;

the resin adopts polyurethane acrylate and organic silicon resin with the weight ratio of 1:0.05, namely: 19kg of polyurethane acrylate and 1kg of organic silicon resin;

the preparation method of the high-adhesion UV ink comprises the following steps:

(1) preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

(2) grinding color paste: grinding color paste, wherein the particle size of the ground color paste is 100-300 nm;

(3) preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink, wherein the filtering precision is 1-3 mu m.

Example 5

A high-adhesion UV ink comprises color paste and a diluent:

the color paste comprises the following components:

CTFA 5kg；

4kg of dispersing agent;

5kg of pigment;

the diluent comprises the following components:

wherein the content of the first and second substances,

the dispersing agent adopts Solsperse 24000;

pigment is Pigment Black 7;

the surfactant adopts BYK-161;

the resin adopts polyurethane acrylate and polyester acrylate with the weight ratio of 1:1, namely: 10kg of polyurethane acrylate and 10kg of polyester acrylate;

the preparation method of the high-adhesion UV ink comprises the following steps:

(1) preparing color paste: mixing CTFA with a dispersant, and then adding a pigment to prepare a color paste;

(2) grinding color paste: grinding color paste, wherein the particle size of the ground color paste is 100-300 nm;

(3) preparing UV ink: and adding a surfactant, PHEA, HDDA and resin into the ground color paste, uniformly mixing, and filtering to obtain the high-adhesion UV ink, wherein the filtering precision is 1-3 mu m.

Example 6

A high adhesion UV ink, differing from example 5 in that:

PHEA was added in an amount of 21kg, HDDA was added in an amount of 44kg, and the weight ratio of PHEA to HDDA was 1: 2.1.

Example 7

A high adhesion UV ink, differing from example 5 in that:

19.7kg of PHEA and 45.3kg of HDDA were added, and the weight ratio of PHEA to HDDA was 1: 2.3.

Example 8

A high adhesion UV ink, differing from example 5 in that:

18kg of PHEA was added, 47kg of HDDA was added, and the weight ratio of PHEA to HDDA was 1: 2.6.

Example 9

A high adhesion UV ink, differing from example 5 in that:

22kg of PHEA and 43kg of HDDA were added, and the weight ratio of PHEA to HDDA was 1: 1.95.

Example 10

A high adhesion UV ink, differing from example 5 in that:

the resin adopts polyurethane acrylate, novolac epoxy resin and organic silicon resin in a weight ratio of 1:0.4:0.3, namely: 11.8kg of urethane acrylate, 4.7kg of novolac epoxy resin and 3.5kg of silicone resin.

Example 11

A high adhesion UV ink, differing from example 5 in that:

the resin adopts polyurethane acrylate, novolac epoxy resin and organic silicon resin in a weight ratio of 1:0.7:0.1, namely: 11.1kg of urethane acrylate, 7.8kg of novolac epoxy resin and 1.1kg of silicone resin.

Example 12

A high adhesion UV ink, differing from example 5 in that:

the resin adopts polyurethane acrylate, novolac epoxy resin and organic silicon resin in a weight ratio of 1:0.6:0.2, namely: 11.1kg of urethane acrylate, 6.7kg of novolac epoxy resin and 2.2kg of silicone resin.

Comparative example

Comparative example 1

A commercially available UV ink which is suitable for printing materials made of non-absorbent materials such as PET and glass.

Comparative example 2

A UV ink, differing from example 5 in that:

PHEA was replaced with equal weight HDDA.

Comparative example 3

A UV ink, differing from example 5 in that:

HDDA was replaced with equal weight PHEA.

Performance detection

The adhesion performance test was performed on the high adhesion UV ink samples prepared in examples 1 to 12 and the UV inks of comparative examples 1 to 3, wherein the types of printing materials used, the preparation method of the samples, and the evaluation method of the adhesion performance of the UV inks were as follows:

type of substrate: two non-absorbent materials, namely a PET plate and glass, are used as printing materials. Before the UV ink is coated, the surface of a printing stock is kept clean and dry without any pretreatment such as primer coating and the like;

the sample preparation method comprises the following steps: a sample of UV ink was applied to the surface of the substrate,coating thickness is 30-50 μm, UV-LED curing agent is adopted for curing, and irradiation is carried out at 8W/cm²And the time is 5s, so that complete curing is ensured and an ink layer is formed. Then, placing the printing stock printed with the UV ink sample in boiling water for 60min, taking out and drying to obtain a UV ink test sample;

the UV ink adhesion performance evaluation method comprises the following steps: the UV ink test samples were rated for adhesion as specified in QB/T9286-1998 on a scale of 0 to 5, with the larger the number, the more severe the ink layer flaking and the poorer the adhesion.

The results of evaluating the adhesion properties of the high adhesion UV inks of examples 1 to 12 and the UV inks of comparative examples 1 to 3 are shown in table 1.

TABLE 1 evaluation results of UV ink adhesion Properties

Test sample	PET board	Glass
			Example 1	3	3
Example 2	3	2
			Example 3	2	2
Example 4	3	3
			Example 5	2	1
Example 6	2	1
			Example 7	2	2
Example 8	3	3
			Example 9	3	3
Example 10	1	0
			Example 11	0	0
Example 12	0	0
			Comparative example 1	4	4
Comparative example 2	5	5
			Comparative example 3	5	5

According to table 1, it can be seen from the evaluation results of examples 1 to 5 and comparative example 1 that the adhesion performance of the test samples corresponding to examples 1 to 5 is better. The detection result shows that compared with the same type of currently marketed UV ink, the UV ink disclosed by the invention has more excellent adhesion performance on non-absorbent printing materials such as PET and glass, so that the application range of the UV ink can be greatly widened.

As can be seen from the evaluation results of examples 5 to 10 and comparative examples 2 to 3, the adhesion performance of the test samples corresponding to examples 5 to 10 is better, which indicates that, for the UV ink formula system and the applied printing material, a synergistic effect exists between the PHEA and the HDDA. Further comparing examples 5-7 with examples 8-10, it can be seen that the adhesion performance of the test samples corresponding to examples 5-7 is better, which indicates that, for the UV ink formula system and the applied printing material, the proportion of the two components, namely the PHEA and the HDDA, has a greater influence on the adhesion performance of the UV ink, and when the weight ratio of the PHEA to the HDDA is 1 (2.1-2.3), the adhesion performance of the UV ink formula system is more excellent.

As can be seen from the evaluation results of examples 5 and 10 to 12, the adhesion performance of the test samples corresponding to examples 10 to 12 is better. The test result shows that for the UV ink formula system and the applied printing stock, the type and the proportion of the resin have larger influence on the adhesion performance of the UV ink, and when the resin adopts urethane acrylate, novolac epoxy resin and organic silicon resin, and the weight ratio of the urethane acrylate, the novolac epoxy resin and the organic silicon resin is 1 (0.1-0.3) to (0.4-0.7), the adhesion performance of the formula system is better. This demonstrates the synergistic interaction of the urethane acrylate, novolac epoxy and silicone resins for the UV ink formulation system of the present application and the substrate to which it is applied.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.