阅读说明：本技术 Sbs弹性油墨及其制备方法 (SBS elastic printing ink and preparation method thereof ) 是由 史险峰 何静 兰世操 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种SBS弹性油墨及其制备方法,属于油墨技术领域,由下述重量百分比的原料组成：组合树脂35-40%、组合溶剂40-45%、颜料10-15%、助剂5-10%,上述原料总计为100%；其中,所述组合树脂为SBS树脂与EVA树脂的组合；所述组合溶剂为甲基环己烷、乙酸乙酯和丙二醇甲醚的组合；所述助剂包括防沉剂、增塑剂和分散剂；本发明的弹性表印油墨,尤其是其具有良好的拉伸和恢复性,以其优异的附着性能,使得在承印物表面牢牢附着,可随承印物收缩而收缩,不断裂,不脱层；浅版转移性能优异,层次再现性好。有优异的干燥性、耐揉搓、附着牢度好；抗粘连性好,刮刀性能好,印刷后图文部分不易脱落。(The invention discloses SBS (styrene butadiene styrene) elastic ink and a preparation method thereof, belonging to the technical field of ink, and comprising the following raw materials in percentage by weight: 35-40% of combined resin, 40-45% of combined solvent, 10-15% of pigment and 5-10% of auxiliary agent, wherein the total amount of the raw materials is 100%; wherein the combined resin is the combination of SBS resin and EVA resin; the combined solvent is a combination of methylcyclohexane, ethyl acetate and propylene glycol methyl ether; the auxiliary agent comprises an anti-settling agent, a plasticizer and a dispersing agent; the elastic surface printing ink disclosed by the invention has good stretching and recovery properties, and is firmly attached to the surface of a printing stock by virtue of excellent attachment performance, can be contracted along with the contraction of the printing stock, and is not broken or delaminated; the transfer performance of the shallow plate is excellent, and the layer reproducibility is good. The coating has excellent drying property, rubbing resistance and good adhesion fastness; good anti-adhesion property and good scraper performance, and the image-text part is not easy to fall off after printing.)

1. The SBS elastic ink is characterized by comprising the following raw materials in percentage by weight:

35 to 40 percent of combined resin

40 to 45 percent of composite solvent

Pigment 10-15%

5 to 10 percent of auxiliary agent

The total amount of the raw materials is 100 percent;

wherein the combined resin is the combination of SBS resin and EVA resin; the combined solvent is a combination of methylcyclohexane, ethyl acetate and propylene glycol methyl ether; the auxiliary agent comprises an anti-settling agent, a plasticizer and a dispersing agent.

2. The SBS elastic ink as claimed in claim 1, wherein the EVA resin is an EVA resin having a vinyl acetate content of 20-28% by mass.

3. The SBS elastomeric ink of claim 1, wherein the anti-settling agent is fumed silica.

4. The SBS elastomeric ink of claim 1, wherein the plasticizer is an aliphatic dibasic acid ester.

5. The SBS elastomeric ink of claim 1, wherein the dispersant is a propylene glycol block polyester.

6. The SBS elastomeric ink as claimed in claim 1, comprising the following raw materials in weight percent:

SBS resin 30%

EVA resin 8%

27 percent of methylcyclohexane

10 percent of ethyl acetate

Propylene glycol methyl ether 5%

Pigment 11%

5.5 percent of anti-settling agent

2 percent of plasticizer

1.5 percent of dispersant.

7. The method for preparing SBS elastic printing ink according to any one of claims 1-6, wherein the raw materials in the proportion except the anti-settling agent are stirred and mixed uniformly in a mixing and stirring cylinder, then the mixture is put into a sand mill for grinding, the grinding is stopped when the fineness reaches below 20 μm, the ink is adjusted, the anti-settling agent is added, the viscosity is tested and the mixture is coated in a No. 4 cup for 28-35s, and the SBS elastic printing ink is obtained after filtering and packaging.

Technical Field

The invention relates to the technical field of printing ink, in particular to SBS (styrene butadiene styrene) elastic printing ink and a preparation method thereof.

Background

With the continuous and high-speed development of economy in China, the packaging requirements of people on products are higher and higher, the application fields are widened continuously, and some novel and peculiar materials are used for printing base materials gradually, for example, the printing base materials are applied to various rubber ornaments with larger elasticity and larger elasticity. For these substrates with greater elasticity, the ink used needs to be an elastic ink, which is a common requirement for elastic inks, such as environmental protection, bending resistance, and stretch resistance.

The elastic ink has the following performance characteristics: soft, bending resistant, super-strong elasticity, water washing resistance and good adhesive force, and belongs to a non-toxic, tasteless and environment-friendly series product. However, many of the products on the market today do not have the required stretch recovery.

In order to improve the performances, a lot of efforts are made by those skilled in the art, for example, chinese patent application No. 2009101727101 entitled benzene-free environment-friendly extrusion coating ink discloses an ink without benzene solvent and having good extrusion coating performance, which uses SBS resin and modified EVA resin as binders, dimethyl carbonate as solvent and HR type dispersant, but the ink of the patent application may have good peeling strength and extrusion coating capability when printing on film substrates such as BOPP, PET, nylon and the like due to solvent use and the like, but the extrusion coating capability is poor when printing on materials such as silica gel and the like, and thus cannot meet the requirements.

Disclosure of Invention

The present invention aims to provide an SBS elastic ink to solve the above problems.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the composite material consists of the following raw materials in percentage by weight:

the total amount of the raw materials is 100 percent;

wherein the combined resin is the combination of SBS resin and EVA resin; the combined solvent is a combination of methylcyclohexane, ethyl acetate and propylene glycol methyl ether; the auxiliary agent comprises an anti-settling agent, a plasticizer and a dispersing agent.

The SBS resin and the styrene-butadiene-styrene triblock copolymer, namely the thermoplastic styrene-butadiene rubber, are block polymers prepared by anionic polymerization by taking butadiene styrene as a monomer, and are widely applied to the industries of asphalt modification, shoe making, plastic modification, adhesives and the like. For example, the aforementioned application No. 2009101727101, the name of the invention is chinese patent application for benzene-free environment-friendly extrusion coating ink, but the ink of the patent application may have good peel strength and extrusion coating capability when printed on film substrates such as BOPP, PET, nylon, etc. due to the use of a solvent, etc., but has poor extrusion coating capability when printed on materials such as silica gel, etc., and thus cannot meet the requirement.

The SBS resin can be a YH-792 type SBS resin of the holy petrifaction, for example, the SBS resin has extremely strong elasticity, plays a role of main resin in an elastic ink system, and has excellent performance and flexibility assisted by EVA resin, so that a film layer is not easy to crack, and can be recovered as before after being stretched;

the SBS resin solvent is difficult to dissolve in most solvents, so that the selection and proportion of the solvent are particularly important in the dissolving process, and the inventor of the application adopts methylcyclohexane with a proper proportion through a large number of experiments to ensure that the SBS resin can be uniformly dispersed in a system; in order to adjust the printing drying speed, ethyl acetate and propylene glycol methyl ether are also added, and the propylene glycol methyl ether can assist the methylcyclohexane to better dissolve the SBS resin.

Ink of the invention, printer speed: 100-250 m/min printing speed;

printing viscosity: thin wall # 3 cup: 10-15 seconds.

As a preferable technical scheme, the EVA resin is an EVA resin with the mass percentage of the vinyl acetate of 20-28%. The EVA resin is an ethylene-vinyl acetate copolymer with the molecular formula of (C)₂H₄)x.(C₄H₆O₂) y, the inventor proves through a large number of experiments that the EVA resin with the vinyl acetate content of 20-28% by mass can be better matched with other components, especially can be better cooperated with the SBS resin of the application to obtain the elastic ink with better performance.

The present invention may select, for example, 9109 as the pigment, which is an asahi aluminum pigment.

As a preferred technical scheme, the anti-settling agent is fumed silica.

Preferably, the plasticizer is an aliphatic dibasic acid ester.

Preferably, the dispersant is propylene glycol block polyether, and L64 from Haian petrochemical plant can be selected.

The preferable technical scheme is that the material comprises the following raw materials in percentage by weight:

with the above proportions, performance can be optimized.

The second purpose of the invention is to provide a preparation method of the SBS elastic ink, which adopts the technical scheme that the raw materials in the proportion except the anti-settling agent are stirred and mixed uniformly in a mixing and stirring cylinder, then the mixture is put into a sand mill for grinding, the grinding is stopped when the fineness reaches below 20 mu m, after the anti-settling agent is added in the ink, the viscosity is tested to be coated in a No. 4 cup for 28-35s, and the SBS elastic ink is obtained by filtering and packaging.

Compared with the prior art, the invention has the advantages that: the elastic surface printing ink disclosed by the invention has good stretching and recovery properties, and is firmly attached to the surface of a printing stock by virtue of excellent attachment performance, can be contracted along with the contraction of the printing stock, and is not broken or delaminated; the transfer performance of the shallow plate is excellent, and the layer reproducibility is good. The coating has excellent drying property, rubbing resistance and good adhesion fastness; good anti-adhesion property and good scraper performance, and the image-text part is not easy to fall off after printing.

Detailed Description

The present invention will be further described with reference to the following examples.