阅读说明：本技术 一种两亲性印刷用涂层及其制备方法和应用 (Amphiphilic printing coating and preparation method and application thereof ) 是由 陈诚 王君 王卫华 于 2021-07-14 设计创作，主要内容包括：本发明提出了一种两亲性印刷用涂层及其制备方法和应用,所述涂层按照重量份数计算,包括水性树脂乳液15-20份、聚丙烯酸水溶液15-20份、水性蜡乳液3-5份、水性流平剂1-3份、水性润湿剂1-3份和水性消泡剂0.5-1.5份,通过混合搅拌调节固含量至30％可以得到本发明的两亲性印刷用涂层,本发明的两亲性印刷用涂层可以应用于PMMA面板的表面印刷中,改善了PMMA面板的水性印刷效果差的问题,具有良好的应用前景。(The invention provides an amphiphilic printing coating and a preparation method and application thereof, wherein the coating comprises, by weight, 15-20 parts of aqueous resin emulsion, 15-20 parts of polyacrylic acid aqueous solution, 3-5 parts of aqueous wax emulsion, 1-3 parts of aqueous leveling agent, 1-3 parts of aqueous wetting agent and 0.5-1.5 parts of aqueous defoaming agent, and the amphiphilic printing coating can be obtained by adjusting the solid content to 30% through mixing and stirring.)

1. The amphiphilic printing coating is characterized by comprising the following components in parts by mass:

2. the amphiphilic printing coating of claim 1 wherein the aqueous resin emulsion is a polymethylmethacrylate emulsion.

3. The amphiphilic printing coating of claim 2 wherein the polymethylmethacrylate emulsion has a solids content of 25-35%.

4. The amphiphilic printing coating of claim 2 wherein the polymethylmethacrylate emulsion has a number average molecular weight of 2000-3000.

5. The amphiphilic printing coating of claim 1 wherein the aqueous polyacrylic acid solution has a solids content of 45-55%.

6. The amphiphilic printing coating of claim 1 wherein the aqueous wax emulsion is an oxidized polyethylene wax emulsion having a solids content of 25-35%.

7. The amphiphilic printing coating of claim 1 wherein the aqueous wetting agent is one or a mixture of polypropylene glycol diacetate and polypropylene glycol disulfate.

8. The method of preparing an amphiphilic printing coating according to any of claims 1-7, comprising the steps of:

respectively weighing the water-based resin emulsion, the polyacrylic acid aqueous solution, the water-based wax emulsion, the water-based leveling agent, the water-based wetting agent and the water-based defoaming agent according to the parts by weight, uniformly mixing, adding deionized water, and adjusting the solid content to be 30% to obtain the amphiphilic printing coating.

9. Use of an amphiphilic printing coating according to any of claims 1-7 for printing on the surface of a PMMA panel.

Technical Field

The invention relates to the technical field of printing, in particular to an amphiphilic printing coating and a preparation method and application thereof.

Background

With the increasingly strict requirement on environmental protection, originally gravure printing serving in the packaging printing neighborhood uses oily ink containing a large amount of organic solvent, and organic solvent polluting atmosphere is discharged in the printing production process.

In order to improve the binding force of the aqueous printing material on the polymeric organic panel, the surface of the polymeric organic panel needs to be subjected to priming treatment, and the affinity and the binding force of the aqueous ink are improved by using the amphiphilic priming layer.

Disclosure of Invention

In view of the above, the invention provides an amphiphilic printing coating, and a preparation method and application thereof.

The technical scheme of the invention is realized as follows: the invention provides an amphiphilic printing coating, which comprises the following components in percentage by mass:

based on the above technical solution, preferably, the aqueous resin emulsion is a polymethyl methacrylate emulsion.

On the basis of the technical scheme, preferably, the solid content of the polymethyl methacrylate emulsion is 25-35%.

Based on the above technical solution, preferably, the number average molecular weight of the polymethyl methacrylate in the polymethyl methacrylate emulsion is 2000-3000.

More preferably, the number average molecular weight of the polymethyl methacrylate in the polymethyl methacrylate emulsion is 2000-3000.

On the basis of the technical scheme, preferably, the aqueous wax emulsion is oxidized polyethylene wax emulsion, and the solid content of the oxidized polyethylene wax emulsion is 25-35%.

On the basis of the above technical solution, preferably, the aqueous wetting agent is one or a mixture of two of polypropylene glycol diacetate and polypropylene glycol disulfate.

On the basis of the technical scheme, preferably, the aqueous leveling agent is polyether modified polydimethylsiloxane, and the aqueous defoaming agent is an organic silicon defoaming agent.

The invention also provides a preparation method of the coating for amphipathic printing, which is characterized by comprising the following steps of:

respectively weighing the water-based resin emulsion, the polyacrylic acid aqueous solution, the water-based wax emulsion, the water-based leveling agent, the water-based wetting agent and the water-based defoaming agent according to the parts by weight, uniformly mixing, adding deionized water, and adjusting the solid content to be 30% to obtain the amphiphilic printing coating.

The amphiphilic printing coating of the invention can be applied in surface printing of PMMA panels.

Compared with the prior art, the amphiphilic printing coating and the preparation method and application thereof have the following beneficial effects:

(1) the invention provides a technical scheme of an amphipathic coating material for printing, which can overcome the problem that the conventional coating material for printing cannot simultaneously meet the requirement of better affinity with an organic polymer substrate panel material and a water-based printing coating;

(2) the invention also discloses a preparation method of the corresponding printing coating, the whole method is simple, the printing coating prepared by the preparation method can be directly applied to the surface printing prime coat treatment of the PMMA bottom plate, and the problem of poor surface aqueous printing effect of the PMMA bottom plate is solved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example 1

Weighing 15kg of polymethyl methacrylate emulsion with the solid content of 25 percent according to the parts by weight, wherein the number average molecular weight of the polymethyl methacrylate is 2000, the acrylic acid aqueous solution with the solid content of 45 percent is 15kg, the oxidized polyethylene wax emulsion with the solid content of 25 percent is 3kg, 1kg of polyether modified polydimethylsiloxane DH-4033 purchased from a Qingtian new material, 1kg of sodium polypropylene glycol diacetate and 0.5kg of Dow AFE 1410 organic silicon defoaming agent, mixing, adding 2kg of deionized water, mixing and stirring uniformly to obtain the amphiphilic printing coating with the solid content of 30 percent.

Example 2

Weighing 18kg of polymethyl methacrylate emulsion with the solid content of 30 percent according to the parts by weight, wherein the number average molecular weight of the polymethyl methacrylate is 2500, 18kg of acrylic acid aqueous solution with the solid content of 50 percent, 4kg of oxidized polyethylene wax emulsion with the solid content of 30 percent, 2kg of polyether modified polydimethylsiloxane DH-4033 purchased from Qingtian new materials, 2kg of sodium polypropylene glycol disulfate and 1kg of Dow AFE 1410 organic silicon defoaming agent, mixing, adding 7kg of deionized water, mixing and stirring uniformly to obtain the amphiphilic printing coating with the solid content of 30 percent.

Example 3

According to the weight parts, respectively weighing 20kg of polymethyl methacrylate emulsion with the solid content of 35%, wherein the number average molecular weight of the polymethyl methacrylate is 3000, the acrylic acid aqueous solution with the solid content of 55% is 20kg, the oxidized polyethylene wax emulsion with the solid content of 35% is 5kg, and 3kg of polyether modified polydimethylsiloxane DH-4033, 3kg of sodium polypropylene glycol disulfide and 1.5kg of Dow AFE 1410 organosilicon defoaming agent purchased from Qingtian new materials, mixing, adding 13.3kg of deionized water, mixing and stirring uniformly to obtain the amphiphilic printing coating with the solid content of 30%.

Comparative example 1

The comparative example used the same starting materials and preparation as in example 2, except that sodium lauryl sulfate was used instead of sodium polypropylene glycol disulfate. (adhesion improvement)

Comparative example 2

The comparative example used the same raw materials and preparation method as example 2, except that a polyethylene wax emulsion was used instead of the oxidized polyethylene wax emulsion. (improvement in adhesion, gloss, frictional force, hardness)

Comparative example 3

The raw materials and preparation method used in this comparative example were the same as those in example 2 except that a polyether-type aqueous polyurethane resin was used instead of the polymethyl methacrylate having a number average molecular weight of 2500. (adhesion improvement)

The amphipathic printing coating prepared in the above examples 1 to 3 and comparative examples 1 to 3 is coated on a panel made of PMMA, after the coating is cured, a series of performance tests are performed, wherein the test items include the viscosity of the coating surface at normal temperature, the adhesion between the coating and the panel, the glossiness of the coating surface, the hardness of the coating, and the stabilizing effect of the coating in boiling water, and the test results are as follows:

the data show that the amphipathic printing coating can form a good coating structure on the surface of a panel made of PMMA material, the adhesion of the coating is strong, the mechanical property of the coating is strong, and the appearance is smooth and glossy.

After the aqueous spray printing is performed on the coating surfaces of the above examples and comparative examples, the position of the spray printing is wiped 100 times under 500g of pressure, and whether the position of the spray printing has obvious fading is observed, and the results are as follows:

grouping

Example 1

Example 2

Example 3

Comparative example 1

Comparative example 2

Comparative example 3

Whether or not to lose color

Is free of

Is free of

Is free of

Has color fading

Is free of

Is free of

The results show that the amphiphilic printing coating can be attached to a PMMA substrate by using the specific wetting agent, can be printed by using the aqueous printing coating, and has good amphipathy and printing stability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.