Gravure ink for rust-proof lubricating oil

Abstract

The gravure ink is prepared from the following components in percentage by mass: 10 to 15 percent of chlorinated rubber resin, 10 to 15 percent of butadiene styrene rubber resin, 2 to 3 percent of CPP (Chlorinated Polypropylene) modified resin, 3 to 5 percent of polyester polyol, 2 to 3 percent of polytetrafluoroethylene modified polyethylene wax, 4 to 6 percent of polyamide wax, 2 to 3 percent of cross-linking agent and 50 to 60 percent of color paste. The ink disclosed by the invention can resist corrosion and dissolution of rust-proof lubricating oil, has good rebound resilience, has good restorability after being stretched by external force, ensures that patterns printed by the ink are not easily damaged by the external force, and also has good adhesiveness, wear resistance, scratch resistance and rubbing resistance.

Description

Technical Field

[0001] The invention relates to the technical field of inks, in particular to a gravure ink resistant to rust-proof lubricating oil. Background Art

[0002] Anti-rust lubricating oil can not only prevent metal from rusting, but also lubricate. It can form a protective film on the metal surface to prevent air and moisture from contacting the metal, thereby preventing metal parts from rusting. It can also lubricate metal moving parts and reduce wear.

[0003] Commonly used corrosion inhibitors in rust-proof lubricating oils include alkaline earth metal salts of fatty acids or cyclohexane acids, petroleum sulfonates, etc. Among them, petroleum sulfonates are used by many rust-proof lubricating oil manufacturers as a high-quality surfactant, such as Mobil's Rama 522 rust-proof lubricating oil.

[0004] Existing anti-rust lubricants are generally packaged in cans or barrels, which are costly and inconvenient and inflexible to repack. Therefore, plastic bag packaging has emerged. The packaging bags must have corresponding names, trademarks, specifications, dates, etc. to distinguish them. These labels must be printed with inks, but the current gravure printing inks cannot meet the corrosion and dissolution problems of anti-rust lubricants. Summary of the invention

[0005] In view of the above problems, the present invention aims to provide a gravure ink resistant to rust-proof lubricating oil, which can resist corrosion and dissolution of rust-proof lubricating oil, has good resilience, and has good recovery after being stretched by external force, so as to ensure that the ink printing pattern is not easily damaged by external force. It also has good adhesion, wear resistance, scratch resistance and rubbing resistance.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A gravure ink resistant to rust-proof lubricating oil, characterized in that it comprises, by mass percentage, 10-15% of chlorinated rubber resin, 10-15% of styrene-butadiene rubber resin, 2-3% of CPP modified resin, 3-5% of polyester polyol, 2-3% of polytetrafluoroethylene modified polyethylene wax, 4-6% of polyamide wax, 2-3% of crosslinking agent, and 50-60% of color paste.

[0008] Preferably, the chlorinated rubber resin has a softening point of 70-75° C., a molecular weight of 5000-20000, a chlorine content of 65-68%, a decomposition temperature of ≥105° C., and a moisture content of ≤0.2%.

[0009] Preferably, the styrene-butadiene rubber resin has a softening point of 70-80° C., a molecular weight of 150,000-400,000, a volatile matter ≤0.3%, a 25% methylcyclohexane solution viscosity of 1,000-1,200 / mpa.s, a tensile strength ≥24Mpa, and an elongation at break ≥700%.

[0010] Preferably, the CPP modified resin has a softening point of 70-80° C., a molecular weight of 100,000-200,000, and a chlorine content of 31-32%.

[0011] Preferably, the polyester polyol has a hydroxyl value of 400-500 mgKOH / g, an acid value of 0.3-0.5 mgKOH / g, a moisture content of ≤0.05%, and a molecular weight of 2500-3000.

[0012] Preferably, the melting point of polytetrafluoroethylene modified wax is 120-130° C., and the softening point of polyamide wax is 95-100° C. Preferably, the crosslinking agent is phosphate acyloxy isooctyl aluminum ester.

[0013] Preferably, the color paste is a resin-free color paste.

[0014] Preferably, the resin-free color paste comprises, by mass percentage, 40-60% pigment, 4-6% dispersant, and the remainder solvent.

[0015] Preferably, the solvent is a combination of methylcyclohexane, n-butyl acetate and isopropanol.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The chlorinated rubber resin and styrene-butadiene rubber resin are used as the main resins in the formula of the present invention, which have a certain chemical corrosion resistance and can withstand the erosion of some acidic and alkaline chemical substances such as rust-proof lubricating oils, thereby ensuring that the ink has a certain chemical resistance at the source. In addition, the rubber resin used has good resilience and has good recovery after being stretched by external forces, thereby ensuring that the ink printing pattern is not easily damaged by external forces. At the same time, the rubber resin used has strong adhesion, ensuring that the ink is not easy to fall off. In combination with functional additives such as polyamide wax, phosphate ester crosslinking agent, polytetrafluoroethylene modified polyethylene wax with good stability, CPP modified resin, etc., the ink's resistance to rust-proof lubricating oil corrosion and solubility, as well as adhesion, wear resistance, scratch resistance and rubbing resistance are improved as a whole.

[0018] 2. The resin-free color paste in the formula of the present invention uses a high-efficiency dispersant with a high pigment affinity group to disperse the pigment and grind the pigment into a color paste, which can improve the dispersibility and stability of the ground pigment. Since there is no grinding resin in the resin-free color paste, the defect of some grinding resins themselves being easily soluble in rust-proof lubricating oil can be avoided. At the same time, since the color paste has no resin, the reactivity problem of the grinding resin and other resins in the formula system can be avoided, which is beneficial to improving the physical and chemical properties and storage stability of the ink.

[0019] 3. The lubricating and rust-proof lubricating oil gravure packaging ink of the present invention has good printing adaptability and can meet the requirements of a wide range of printing speeds from low speed to high speed. The ink has good film-forming properties, a smooth surface, strong adhesion, and good tensile resistance. It is not easy to produce adhesion after printing, and the printed matter has strong corrosion solubility of lubricating and rust-proof lubricating oil after drying. The printing substrate has a wide range of choices, and can be printed on film substrates such as PE, CPP, and PVC, achieving better printing transfer effects, adhesion, scratch resistance, wear resistance, and corrosion solubility of lubricating and rust-proof lubricating oil.

[0020] 4. The ink of the present invention is mainly composed of alcohol ester solvents, which meets the requirements for VOC control in the GB38507-2020 standard. DETAILED DESCRIPTION

[0021] For ease of understanding of the present invention, the present invention will be described more fully below with reference to relevant embodiments. Preferred embodiments of the present invention are provided in the embodiments, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] The present invention is further described below with specific embodiments:

[0024] It should be noted that, unless otherwise specified, the raw materials used in the technical solutions provided by the present invention are prepared by conventional means or purchased through commercial channels.

[0025] A gravure ink resistant to rust-proof lubricating oil, the components and mass percentages of which are shown in Table 1 below:

[0026]

[0027] Among the above components: the softening point of the chlorinated rubber resin is 70-75°C, the molecular weight is 5000-20000, the chlorine content is 65-68%, the decomposition temperature is ≥105°C, and the water content is ≤0.2%.

[0028] The softening point of styrene-butadiene rubber resin is 70-80°C, the molecular weight is 150000-400000, the volatile matter is ≤0.3%, the 25% methylcyclohexane solution viscosity is 1000-1200 / mpa.s, the tensile strength is ≥24Mpa, and the elongation at break is ≥700%.

[0029] The softening point of CPP (chlorinated polypropylene) modified resin is 70-80°C, the molecular weight is 100,000-200,000, the chlorine content is 31-32%, and it is easily soluble in ester solvents.

[0030] The melting point of polytetrafluoroethylene wax is 120-130℃.

[0031] The softening point of polyamide wax is between 95 and 100°C.

[0032] The hydroxyl value of the polyester polyol is 400-500 mgKOH / g, the acid value is 0.3-0.5 mgKOH / g, the moisture content is strictly controlled below 0.05%, and the molecular weight is controlled between 2500 and 3000.

[0033] The color paste is a resin-free color paste, and the color paste components and mass percentages are shown in Table 2 below:

[0034]

[0035] The color paste of the present invention does not contain resin, and uses a high molecular weight block copolymer solution containing pigment affinity groups as a dispersant to grind the pigment into a color paste, which can improve the dispersibility and stability of the ground pigment. The dispersant of this embodiment is Lubrizol Sol Sperse 24000 SC.

[0036] Since there is no grinding resin in the resin-free color paste, the defect that the grinding resin may be easily soluble in the anti-rust lubricating oil can be avoided. At the same time, the reactivity and compatibility problems between the grinding resin and other resins in the formula system can be avoided, which is beneficial to improving the physical and chemical properties and storage stability of the present invention.

[0037] The method for preparing the ink of the present invention comprises the following steps:

[0038] S1. Put the components of the color paste into a mixing tank, disperse the pigment at high speed for 60 minutes, and then grind to a fineness of ≤10μm to obtain a resin-free color paste;

[0039] S2. Mix the other components with the resin-free color paste, and disperse them uniformly at high speed using a disperser to obtain the ink of the present invention.

[0040] The inks prepared in Examples 1 to 5 were tested, and the anti-rust lubricating oil used in the test was Mobilarma 522. The test results of the main performance indicators are shown in Table 3 below:

[0041]

[0042] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the scope of protection of the claims of the present invention. For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the scope of protection of the claims of the present invention.

Claims

1. A gravure ink resistant to rust-proof lubricating oil, characterized in that: The composition comprises, by mass percentage, 10-15% of chlorinated rubber resin, 10-15% of styrene-butadiene rubber resin, 2-3% of CPP modified resin, 3-5% of polyester polyol, 2-3% of polytetrafluoroethylene modified polyethylene wax, 4-6% of polyamide wax, 2-3% of crosslinking agent and 50-60% of color paste.

2. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The chlorinated rubber resin has a softening point of 70-75° C., a molecular weight of 5000-20000, a chlorine content of 65-68%, a decomposition temperature of ≥105° C., and a moisture content of ≤0.2%.

3. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The styrene-butadiene rubber resin has a softening point of 70-80° C., a molecular weight of 150,000-400,000, a volatile matter of ≤0.3%, a 25% methylcyclohexane dissolution viscosity of 1,000-1,200 / mpa.s, a tensile strength of ≥24Mpa, and an elongation at break of ≥700%.

4. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The CPP modified resin has a softening point of 70-80° C., a molecular weight of 100,000-200,000, and a chlorine content of 31-32%.

5. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The polyester polyol has a hydroxyl value of 400-500 mgKOH / g, an acid value of 0.3-0.5 mgKOH / g, a moisture content of ≤0.05%, and a molecular weight of 2500-3000.

6. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The melting point of the polytetrafluoroethylene modified polyethylene wax is 120-130°C, and the softening point of the polyamide wax is 95-100°C.

7. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The crosslinking agent is phosphate acyloxy isooctyl aluminate.

8. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The color paste is a resin-free color paste.

9. The gravure ink resistant to rust-proof lubricating oil according to claim 1, characterized in that: The color paste comprises, by mass percentage, 40-60% of pigment, 4-6% of dispersant, and the remainder of solvent.

10. The gravure ink resistant to rust-proof lubricating oil according to claim 9, characterized in that: The solvent is a combination of methylcyclohexane, n-butyl acetate and isopropanol.

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