阅读说明：本技术 一种快干型水性油墨组合物及其制备方法和应用 (Quick-drying water-based ink composition and preparation method and application thereof ) 是由 高延敏 孙存思 陈佳铭 朱裕祥 翟宇强 易文丽 姜宛彤 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种快干型水性油墨组合物,其制备原料包含5-25％的化合物A、2.5-24％的化合物B,还包含5-10％的颜料、1-5％的干燥剂、1-5％的润湿剂、1-5％的中和剂、1-5％的分散剂、12-40％的树脂、25-35％的溶剂和0.5-10％的成膜助剂；A是用马来酸接枝异戊烯得到,B是马来酸与苯乙烯共聚得到。该水性油墨组合物的制备方法是：按照质量比称取A、B、颜料、干燥剂、润湿剂、中和剂、分散剂、树脂、溶剂和成膜助剂,混合,然后使用珠磨机研磨3-10小时,即可得到。本发明的水性油墨组合物用于印刷,油墨和PP或PE基材的粘接性强,油墨的光亮度好,具有极好的稳定性,印刷后的干燥速度很快。(The invention discloses a quick-drying water-based ink composition, which is prepared from the following raw materials of 5-25% of a compound A, 2.5-24% of a compound B, 5-10% of a pigment, 1-5% of a drying agent, 1-5% of a wetting agent, 1-5% of a neutralizing agent, 1-5% of a dispersing agent, 12-40% of a resin, 25-35% of a solvent and 0.5-10% of a film-forming auxiliary agent; a is obtained by grafting isoamylene with maleic acid, and B is obtained by copolymerizing maleic acid and styrene. The preparation method of the water-based ink composition comprises the following steps: a, B, pigment, drying agent, wetting agent, neutralizer, dispersant, resin, solvent and film-forming assistant are weighed according to the mass ratio, mixed and ground for 3-10 hours by a bead mill to obtain the pigment. The water-based ink composition is used for printing, the adhesion between the ink and a PP or PE substrate is strong, the brightness of the ink is good, the stability is excellent, and the drying speed after printing is high.)

1. A quick-drying water-based ink composition is characterized in that the preparation raw materials of the water-based ink composition comprise a compound A and a compound B, the mass ratio of the compound A to the compound B is 1:0.5-0.96, and the molecular structure of the compound A is as follows:

wherein 0 < m < 1, 0 < n < 1, and m + n 1; the molecular structure of compound B is:

wherein 0 < x < 1.

2. The quick-drying aqueous ink composition according to claim 1, wherein the aqueous ink composition is prepared from 5 to 25% of the compound a, 2.5 to 24% of the compound B, 5 to 10% of a pigment, 1 to 5% of a drying agent, 1 to 5% of a wetting agent, 1 to 5% of a neutralizing agent, 1 to 5% of a dispersing agent, 12 to 40% of a resin, 25 to 35% of a solvent, and 0.5 to 10% of a film-forming aid.

3. The quick-drying aqueous ink composition according to claim 2, wherein the pigment is titanium dioxide or barium sulfate; the desiccant is menthol, menthone or nerol.

4. The quick-drying aqueous ink composition according to claim 2, wherein the humectant is a compound having the following molecular structure: R-C.ident.C-OH, wherein R is an alkyl group having 1 to 18 carbon atoms.

5. The quick-drying aqueous ink composition according to claim 2, wherein the neutralizing agent is methylamine, ethanolamine, diethanolamine, or triethanolamine; the dispersant is tween, dodecyl sulfonate or sodium benzenesulfonate.

6. The quick-drying aqueous ink composition according to claim 2, wherein the resin is an acrylic resin or a polyester resin.

7. The quick-drying aqueous ink composition according to claim 2, wherein the solvent is methanol, ethanol, butanol, propanol, ethylene glycol, 1, 3-propanediol, or 1, 4-butanetriol.

8. The quick-drying aqueous ink composition according to claim 2, wherein the film-forming aid is an aqueous acrylic urethane.

9. The method for producing the quick-drying aqueous ink composition according to any one of claims 1 to 8, comprising the steps of: weighing the compound A, the compound B, the pigment, the drying agent, the wetting agent, the neutralizing agent, the dispersing agent, the resin, the solvent and the film-forming aid according to the mass ratio, mixing, and grinding for 3-10 hours by using a bead mill to obtain the quick-drying water-based ink composition.

10. The use of the quick-drying aqueous ink composition according to any one of claims 1 to 8 for printing polyethylene or polypropylene films.

Technical Field

The invention belongs to the field of water-based ink, and particularly relates to a quick-drying water-based ink composition and a preparation method and application thereof.

Background

Polyethylene (PE) and polypropylene (PP) are major packaging materials, and are widely used in the field of packaging due to a series of advantages such as light weight, good chemical stability, and wide mechanical strength distribution. Meanwhile, PP and PE plastics have disadvantages such as poor light resistance, weather resistance and corrosion resistance, and have various defects on the surface after thermoplastic processing and insufficient performance in the field of packaging. Many plastics must be used after secondary processing. The processing is finished by coating or printing ink, so as to achieve the effects of improving the durability of products and beautifying and promoting. However, the PP and PE materials are nonpolar high polymer materials, the surface tension of the PP and PE materials is too small to be lower than 35 dynes, common water-based ink is difficult to wet on the surfaces of PE and PP, the printing effect is poor, and the printing requirements are difficult to meet. Although the solvent-based paint or the solvent-based ink has excellent performances such as adhesive force, flexibility, weather resistance, solvent resistance, wear resistance and the like, and can be used on the surface of plastic to improve the product performance, the solvent-based paint/ink containing aromatic compounds does not meet the requirement of environmental protection standard along with the improvement of the environmental protection requirement in recent years. Typical materials are difficult to wet and bond, resulting in poor adhesion. Therefore, it is difficult to use general water-based ink for printing plastics, and although the drying of the ink can be accelerated by heating, the film is not resistant to high temperature, and the application of the water-based ink which needs to be dried and solidified at high temperature is limited to a certain extent. Therefore, the development and application of the water-based ink for PP and PE are very challenging for the reasons described above.

The water-based ink composition comprises a water-based binder, a pigment, an auxiliary agent and the like, wherein the water-based binder plays a role in binding a substrate and the pigment and plays one of key materials in printing. However, the aqueous binders used at present have difficulty in dissolving in water and insufficient adhesion to PP and PE.

Disclosure of Invention

One object of the present invention is to provide a quick-drying type aqueous ink composition. The specific technical scheme is as follows:

a quick-drying water-based ink composition is prepared from a compound A and a compound B, wherein the mass ratio of the compound A to the compound B is 1:0.5-0.96, and the molecular structure of the compound A is as follows:

wherein 0 < m < 1, 0 < n < 1, and m + n 1; the molecular structure of compound B is:

wherein 0 < x < 1.

Preferably, the raw materials for preparing the water-based ink composition comprise 5-25% of the compound A, 2.5-24% of the compound B, 5-10% of pigment, 1-5% of drying agent, 1-5% of wetting agent, 1-5% of neutralizing agent, 1-5% of dispersing agent, 12-40% of resin, 25-35% of solvent and 0.5-10% of film-forming auxiliary agent.

Preferably, the pigment is titanium dioxide or barium sulfate; the desiccant is menthol, menthone or nerol.

Preferably, the wetting agent is a compound comprising the following molecular structure: R-C.ident.C-OH, wherein R is an alkyl group having 1-18 carbon atoms (i.e., alkynol wetting agents).

Preferably, the neutralizing agent is methylamine, ethanolamine, diethanolamine or triethanolamine; the dispersant is tween, dodecyl sulfonate or sodium benzenesulfonate.

Preferably, the resin is an acrylic resin or a polyester resin.

Preferably, the solvent is methanol, ethanol, butanol, propanol, ethylene glycol, 1, 3-propanediol or 1, 4-butanetriol.

Preferably, the film forming aid is a water-based acrylic polyurethane.

The invention also provides a preparation method of the quick-drying water-based ink composition. The specific technical scheme is as follows:

the preparation method of the quick-drying water-based ink composition comprises the following steps: weighing the compound A, the compound B, the pigment, the drying agent, the wetting agent, the neutralizing agent, the dispersing agent, the resin, the solvent and the film-forming aid according to the mass ratio, mixing, and grinding for 3-10 hours by using a bead mill to obtain the quick-drying water-based ink composition.

Wherein, the compound A can be dissolved or emulsified in water as a connecting material for bonding PP and PE, has the effect of quick drying, and is prepared by using maleic acid to polyisoprene (CH) with molecular weight less than one hundred thousand₂＝C(CH₃)CH＝CH₂) The graft modification is carried out to obtain the graft copolymer, and the specific preparation method is as follows:

melting 100 parts of polyisoprene at 120 ℃, rotating the rotor at 60r/min, adding 5 parts of maleic anhydride, mixing for 2 minutes, adding 1 part of dicumyl peroxide as an initiator, and carrying out melt grafting reaction for 6 minutes to finally obtain a grafting product compound A. When the grafting reaction was completed, m in the formula of a was 0.05 and n was 0.95.

The compound B can improve the adhesive force, change the quick drying property of the ink, has an emulsifying effect and increases the stability and the brightness of the ink; it is obtained by copolymerizing maleic acid and styrene; the preparation method comprises the following steps:

firstly, pouring 51.7ml of styrene into the bottom of a three-neck flask, vacuumizing a reaction system, introducing nitrogen, and adjusting the temperature of an oil bath kettle to 110 ℃; 4.9g of maleic anhydride and 1 wt% of dicumyl peroxide are dissolved in 100ml of acetone solution and titrated into a flask; after reacting for two hours at the temperature, the reactant is settled by ethanol to obtain white jelly; and dissolving the ethanol by acetone for several times for sedimentation (washing effect), and drying in a vacuum oven to obtain a reaction product compound B.

The invention also aims to provide application of the quick-drying water-based ink composition. The specific technical scheme is as follows:

the quick-drying water-based ink composition is applied to printing of polyethylene or polypropylene films.

The invention has the following beneficial effects:

the water-based ink composition is used for printing PP or PE, the adhesion between the ink and a base material is strong, the binding force is high, the brightness is good, the stability is excellent, and the drying speed after printing is high.

Detailed Description

The present invention is described in more detail below, but the present invention is not limited to these examples. Note that, "%" is by mass unless otherwise specified. In the examples described below, the evaluation of the drying effect of substances of formula A and formula B was carried out by direct experiments on a machine at a temperature of 85 ℃ in actual use. For judging the drying effect, the comparative examples to which the substances A and B were not added were added, and the other components were the same in the comparative examples.

Example 1

First, 10 parts of a molecular formula a substance, 8 parts of a molecular formula B substance, 5 parts of barium sulfate, 3 parts of a drying agent, 3 parts of a wetting agent, 3 parts of a dispersing agent, 30 parts of a resin, 6 parts of a film forming aid, 2 parts of a neutralizing agent, and 30 parts of a solvent were mixed, and dispersion treatment was performed for 5 hours using a bead mill with 0.1mm zirconia beads. After milling, a colored dispersion ink composition and an ink composition of comparative example 1 without addition of substances a and B were obtained. The printing substrates used for the experiments were PP and PE films, and the pattern depths of the roll plates were 40 μm.

TABLE 1 aqueous ink composition component 1

Components	Content, wt%
		A	10
B	8
		Pigment (barium sulfate)	5
Desiccant (menthol)	3
		Wetting agent (hexynediol)	3
Neutralizer (methylamine)	2
		Dispersant (Tween 80)	3
Resin (acrylic resin)	30
		Solvent (ethylene glycol)	30
Film-forming assistant (Water-based acrylic polyurethane)	6

The effect is as follows:

1. when 10 parts of the substance of formula A and 8 parts of the substance of formula B were added, the gravure printing speed was 94m/min, while the gravure printing speed of the comparative example without the addition of A and B was 66 m/min.

2. The ink composition does not delaminate after standing for 3 days after stirring, and has good stability.

3. And (3) testing the binding force: taking a printed and dried material, cutting a paint film to a substrate along a straight line by using a knife, wherein the included angle is 30-45 degrees, and the cross point is in the middle of the line length. The 3M tape was applied to the crossing points and the tape was rubbed flat with a force of 1 KG. After waiting for 5 minutes, one end of the adhesive tape is held by hand, force is applied in a direction forming an angle of 45 degrees with the printing surface, the adhesive tape is pulled at the same position for three times, and the phenomenon that the ink on the surface falls off is observed.

The effect is as follows: and a little ink drops at the intersection of the cuts, but the ink drops to less than 5 percent, and the adhesion of the material is grade 1 according to the standard of the (GB/T9286-88) coating adhesion cross-cut test evaluation.

Example 2

First, 12 parts of a molecular formula a substance, 10 parts of a molecular formula B substance, 5 parts of barium sulfate, 3 parts of a drying agent, 3 parts of a wetting agent, 3 parts of a dispersing agent, 29 parts of a resin, 5 parts of a film forming aid, 2 parts of a neutralizing agent, and 28 parts of a solvent were mixed, and dispersion treatment was performed for 5 hours using a bead mill with 0.1mm zirconia beads. After milling, a colored dispersion ink composition and an ink composition of comparative example 2 without addition of substances a and B were obtained. The printing substrates used for the experiments were PP and PE films, and the pattern depths of the roll plates were 40 μm.

TABLE 2 Water-based ink composition component 2

Components	Content, wt%
		A	12
B	10
		Pigment (barium sulfate)	5
Desiccant (menthone)	3
		Wetting agent (hexynediol)	3
Neutralizer (ethanolamine)	2
		Dispersant (sodium dodecyl sulfate)	3
Resin (acrylic resin)	29
		Solvent (1, 3-propylene glycol)	28
Film-forming assistant (Water-based acrylic polyurethane)	5

The effect is as follows:

1. when 12 parts of the substance of formula A and 10 parts of the substance of formula B were added, the gravure printing speed was 102m/min, while the gravure printing speed of the comparative example, in which neither A nor B was added, was 68 m/min.

2. The ink composition does not delaminate after standing for 3 days after stirring, and has good stability.

3. And (3) testing the binding force: taking a printed and dried material, cutting a paint film to a substrate along a straight line by using a knife, wherein the included angle is 30-45 degrees, and the cross point is in the middle of the line length. The 3M tape was applied to the crossing points and the tape was rubbed flat with a force of 1 KG. After waiting for 5 minutes, one end of the adhesive tape is held by hand, force is applied in a direction forming an angle of 45 degrees with the printing surface, the adhesive tape is pulled at the same position for three times, and the phenomenon that the ink on the surface falls off is observed.

The effect is as follows: and a little ink drops at the intersection of the cuts, but the ink drops to less than 5 percent, and the adhesion of the material is grade 1 according to the standard of the (GB/T9286-88) coating adhesion cross-cut test evaluation.

Example 3

First, 15 parts of a molecular formula a substance, 10 parts of a molecular formula B substance, 5 parts of barium sulfate, 3 parts of a drying agent, 3 parts of a wetting agent, 3 parts of a dispersing agent, 28 parts of a resin, 5 parts of a film forming aid, 2 parts of a neutralizing agent, and 26 parts of a solvent were mixed, and dispersion treatment was performed for 5 hours using a bead mill with 0.1mm zirconia beads. After milling, a colored dispersion ink composition and an ink composition of comparative example 3 without addition of substances a and B were obtained. The printing substrates used for the experiments were PP and PE films, and the pattern depths of the roll plates were 40 μm.

TABLE 3 aqueous ink composition component 3

Components	Content, wt%
		A	15
B	10
		Pigment (titanium dioxide)	5
Desiccant (nerol)	3
		Wetting agent (hexynediol)	3
Neutralizer (diethanolamine)	2
		Dispersing agent (sodium benzenesulfonate)	3
Resin (polyester resin)	28
		Solvent (propanol)	26
Film-forming assistant (Water-based acrylic polyurethane)	5

The effect is as follows:

1. when 15 parts of the substance of formula A and 10 parts of the substance of formula B were added, the gravure printing speed was 97m/min, while the gravure printing speed of the comparative example, in which neither A nor B was added, was 63 m/min.

2. The ink composition does not delaminate after standing for 3 days after stirring, and has good stability.

3. And (3) testing the binding force: taking a printed and dried material, cutting a paint film to a substrate along a straight line by using a knife, wherein the included angle is 30-45 degrees, and the cross point is in the middle of the line length. The 3M tape was applied to the crossing points and the tape was rubbed flat with a force of 1 KG. After waiting for 5 minutes, one end of the adhesive tape is held by hand, force is applied in a direction forming an angle of 45 degrees with the printing surface, the adhesive tape is pulled at the same position for three times, and the phenomenon that the ink on the surface falls off is observed.

The effect is as follows: and a little ink drops at the intersection of the cuts, the ink drops to less than 5%, and the adhesive force of the material is grade 1 according to the standard of (GB/T9286-88) coating adhesive force cross-cut method test evaluation.