Color ink carrier, color ink and gravure printing ink and preparation method thereof

Abstract

The invention discloses a color ink carrier, color ink and gravure printing ink and a preparation method thereof. The color ink carrier comprises the following components in parts by weight: 100-600 parts of vinyl chloride and vinyl acetate copolymer, 0-600 parts of polyvinyl chloride, 330-960 parts of a first mixed solvent, 1-3 parts of a defoaming agent, and 0.1-2 parts of phosphoric acid; the first mixed solvent is mixed with a first strong solvent, a first weak solvent, and a first diluent. The color ink carrier provided by the present invention not only has excellent adhesion, but also is fast and economical in preparing the color ink. The prepared color ink, the gravure printing ink for a plastic film composed of varnish and a diluent, has a large cost advantage, and can effectively reduce costs while ensuring the quality of the product. The gravure printing ink is particularly suitable for polyvinyl chloride decorative film.

Description

Technical Field

[0001] The invention relates to the field of chemical industry, in particular to a color ink carrier, color ink and gravure printing ink and a preparation method thereof. Background Art

[0002] As a green, environmentally friendly and fast-producing material, polyvinyl chloride decorative film has gradually replaced traditional paints for furniture and space decoration. In order to ensure that the polyvinyl chloride decorative film has exquisite patterns, high color saturation and a strong three-dimensional visual effect, it is usually prepared by a method of multiple gravure printing on the base film and then hot laminating the mask. The ink used for gravure printing is usually called gravure printing ink, also known as gravure composite ink. The ink system is usually composed of varnish, color ink and diluent. In the prior art, the color ink is prepared by a complex and less efficient grinding process of a color ink carrier and a pigment. Although the existing color ink carrier can dissolve and disperse the pigment after adding a large amount of dispersing aids, it still has the problem of high cost, and the adhesion of the adhesive layer formed after the volatilization of the color ink carrier is poor, which affects the firmness of the hot lamination and directly affects the quality of the product. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a color ink carrier, a color ink and a gravure printing ink and a preparation method thereof. The color ink carrier provided by the present invention not only has excellent adhesion, but also is fast, economical and environmentally friendly when preparing the color ink. The prepared color ink, the gravure printing ink for plastic film composed of varnish and diluent, the gravure printing ink has a large cost advantage, can effectively reduce costs while ensuring the quality of the product, and is particularly suitable for polyvinyl chloride decorative film.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A color ink carrier is prepared by including the following components in parts by weight:

[0006] 100-600 parts of vinyl chloride and vinyl acetate copolymer,

[0007] Polyvinyl chloride 0-600 parts,

[0008] 330-960 parts of the first mixed solvent,

[0009] 1-3 parts of defoaming agent,

[0010] Phosphoric acid 0.1-2 parts;

[0011] The first mixed solvent is formed by mixing a first strong solvent, a first weak solvent and a first diluent.

[0012] Preferably, the average polymerization degree of the VC / VAC vinyl chloride and vinyl acetate copolymer is 400-700.

[0013] Preferably, the polymerization degree of the PVC polyvinyl chloride is 600-1000.

[0014] Preferably, the first strong solvent is a ketone solvent, the first weak solvent is an ester solvent, and the first diluent is toluene or propylene glycol methyl ether acetate.

[0015] The present invention also includes a color ink prepared by using any of the above-mentioned color ink carriers, which is prepared by including the following components in parts by weight:

[0016] 20-40 parts of ink carrier,

[0017] 5-40 parts of solid pre-dispersed pigment.

[0018] Preferably, the solid pre-dispersed pigment comprises the following components in parts by weight:

[0019] Pigment 3-80 parts,

[0020] 3-30 parts of dispersant,

[0021] Grinding base 20-190 parts,

[0022] The grinding mill material is prepared from the following components in parts by weight:

[0023] Vinyl chloride and vinyl acetate copolymer 10-60 parts,

[0024] Heat stabilizer 2-10 parts,

[0025] Environmentally friendly plasticizer 5-40 parts,

[0026] 3-80 parts of light calcium carbonate.

[0027] Preferably, the thermal stabilizer is prepared from the following components in parts by weight:

[0028] Calcium zinc heat stabilizer 0.3-3 parts,

[0029] Epoxidized soybean oil 0.3-3 parts,

[0030] Epoxy resin 0.3-3 parts.

[0031] Preferably, the epoxy resin in the heat stabilizer is 3,4-epoxycycloethylmethyl-3,4-epoxycycloethylcarboxylate.

[0032] Preferably, the environmentally friendly plasticizer is epoxidized soybean oil; the epoxide value of the epoxidized soybean oil is ≥6.5, and the iodine value is ≤3.0.

[0033] Preferably, the fineness of the light calcium carbonate is 2000-3000 mesh.

[0034] Preferably, the dispersant is prepared by comprising the following components in parts by weight:

[0035] 810-1620 parts of polymethyl methacrylate resin,

[0036] 0.27-135 parts of dicumyl peroxide,

[0037] 1079.73-1755 parts of the second mixed solvent;

[0038] The second mixed solvent is formed by mixing a second strong solvent, a second weak solvent and a second diluent.

[0039] Preferably, the second strong solvent is a ketone solvent, the second weak solvent is an ester solvent, and the second diluent is toluene or propylene glycol methyl ether acetate.

[0040] Preferably, the dispersant further comprises 270-1080 parts by mass of polyoxyethylene ether.

[0041] The present invention also includes a method for preparing the above-mentioned color ink, comprising the following steps:

[0042] S1. Preparation of ink carrier: In a reaction vessel, the ink carrier components were added and heated to 70-90 ° C and kept warm for 2-5h under stirring conditions, and filtered to obtain the ink carrier;

[0043] S2. Preparation of ink: Add the ink carrier and solid pre-dispersed pigment prepared in S1 into a stirring barrel in sequence, stir at a low speed for 0.1-0.5h, then stir at a high speed for 0.5-2h, and adjust the viscosity to obtain the ink.

[0044] Furthermore, in step S2, the low-speed stirring speed is 50-300 R / min, and the high-speed stirring speed is 300-10000 R / min.

[0045] The present invention also includes a gravure printing ink prepared using the above-mentioned color ink, which is prepared by including the following components in parts by weight:

[0046] Color ink 10-50 parts,

[0047] 5-40 parts of varnish,

[0048] Diluent 5-80 parts.

[0049] Preferably, the varnish is a color ink carrier, and the diluent is a first mixed solvent.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The ink carrier uses cheap PVC to replace part of VC-VAC as a binder, which has a formula cost advantage;

[0052] Adding a small amount of phosphoric acid to the ink carrier can significantly improve the ink's adhesion to the attachment layer (upper or lower film), making the pattern of the printed product durable and firm;

[0053] The preparation process of the ink does not require frequent coarse and fine grinding like the existing ink products. It does not require expensive and inefficient sand mills or ball mills and expensive abrasives (such as zirconium oxide beads). The investment and maintenance costs are low, the production speed is fast, and the VOC volatility is low, which is good for the environment and the health of production personnel. The VOC content in the workshop is lower and it is not easy to cause fire and explosion accidents.

[0054] The heat stabilizer compounded in the grinding machine material can effectively prevent the burning problem of vinyl chloride and vinyl acetate copolymer caused by the ultra-high temperature in the local area due to strong shearing during the preparation process, such as black spots or agglomerations (loss of activity, inability to melt or dissolve);

[0055] The low molecular weight PMMA in the dispersant can reduce the impact strength of the vinyl chloride-vinyl acetate copolymer, enhance the brittleness of the solid pre-dispersed pigment, and make it very easy to crush it into tiny flakes, which is conducive to rapid dissolution in the solvent;

[0056] The particle size of light calcium carbonate is controlled at 2000-3000 meshes to prevent precipitation due to excessive size and poor friction effect due to excessive size. It plays a stirring role in the room temperature mixing stage and can ensure the stability of the melt size in the grinding stage, thereby effectively transmitting the shear force of the roller and breaking up the pigment agglomerates.

[0057] In the preparation process of the solid pre-dispersed pigment of the present invention, the grinding base generates heat and heats the roller through shearing and friction, thereby eliminating the investment and maintenance of heating equipment and also saving heating energy in the manufacturing process; the grinding base can be recycled and can also be added to the product without affecting the quality of the product, without waste and without generating solid waste;

[0058] The gravure printing ink prepared by the present invention does not use a large amount of expensive commercial dispersants, but adopts a homemade cheap dispersant, which can wet and disperse the pigment in the thermoplastic state of the vinyl chloride-vinyl acetate binary copolymer, and can also keep the refined pigment particles from agglomeration in the dissolved state of vinyl chloride-vinyl acetate. Implementation

[0059] The present invention is further described in detail below in conjunction with specific implementation modes.

[0060] A color ink carrier is prepared from the following components in parts by weight: 100-600 parts of VC / VAC vinyl chloride and vinyl acetate copolymer, 0-600 parts of PVC, 330-960 parts of a first mixed solvent, 1-3 parts of a defoaming agent, and 0.1-2 parts of phosphoric acid; the first mixed solvent is mixed from a first strong solvent, a first weak solvent, and a first diluent.

[0061] Preferably, the average polymerization degree of the VC / VAC vinyl chloride and vinyl acetate copolymer is 400-700.

[0062] The polymerization degree of the PVC is 600-1000. The first strong solvent is a ketone solvent such as butanone or cyclohexanone, the first weak solvent is an ester solvent such as ethyl acetate or methyl acetate, and the first diluent is toluene or propylene glycol methyl ether acetate.

[0063] The present invention also includes a color ink prepared by using the color ink carrier, which includes the following components in parts by weight: 20-40 parts of the color ink carrier and 5-40 parts of solid pre-dispersed pigment.

[0064] Preferably, the solid pre-dispersed pigment is prepared by the following components in parts by weight: 3-80 parts of pigment, 3-30 parts of dispersant, 20-190 parts of grinding base; the grinding mill material is prepared by the following components in parts by weight: 10-60 parts of vinyl chloride and vinyl acetate copolymer, 2-10 parts of heat stabilizer, 5-40 parts of environmentally friendly plasticizer, and 3-80 parts of light calcium carbonate. The heat stabilizer is prepared by the following components in parts by weight: 0.3-3 parts of calcium zinc heat stabilizer, 0.3-3 parts of epoxy soybean oil, and 0.3-3 parts of epoxy resin. The epoxy resin in the heat stabilizer is 3,4-epoxycycloethylmethyl-3,4-epoxycycloethylcarboxylate. The environmentally friendly plasticizer is epoxy soybean oil; the epoxy value of epoxy soybean oil is ≥6.5 and the iodine value is ≤3.0. The fineness of the light calcium carbonate is 2000-3000 mesh. The dispersant is prepared by including the following components in parts by weight: 810-1620 parts of polymethyl methacrylate resin, 0.27-135 parts of diisopropylbenzene peroxide, and 1079.73-1755 parts of a second mixed solvent; the second mixed solvent is a mixture of a second strong solvent, a second weak solvent, and a second diluent. The second strong solvent is a ketone solvent such as butanone or cyclohexanone, the second weak solvent is an ester solvent such as ethyl acetate or methyl acetate, and the second diluent is toluene or propylene glycol methyl ether acetate. The dispersant also includes 270-1080 parts by weight of polyoxyethylene ether.

[0065] The present invention also includes a method for preparing the above-mentioned color ink, comprising the following steps:

[0066] S1. Preparation of ink carrier: In a reaction vessel, the ink carrier components were added and heated to 70-90 ° C and kept warm for 2-5h under stirring conditions, and filtered to obtain the ink carrier;

[0067] S2. Preparation of ink: Add the ink carrier and solid pre-dispersed pigment prepared in S1 into a stirring barrel in sequence, stir at a low speed for 0.1-0.5h, then stir at a high speed for 0.5-2h, and adjust the viscosity to obtain the ink.

[0068] Furthermore, in step S2, the low-speed stirring speed is 50-300 R / min, and the high-speed stirring speed is 300-10000 R / min.

[0069] Furthermore, in step S2, the method for preparing the solid pre-dispersed pigment comprises the following steps:

[0070] S21. Preheating of internal mixer and three-roll mill using grinding base:

[0071] S211. Mixing materials at room temperature: Pour all vinyl chloride-vinyl acetate copolymers, heat stabilizers, environmentally friendly plasticizers and part of light calcium carbonate in the ground base into an internal mixer, turn on the rotor, and mix the materials thoroughly;

[0072] S212. Pressing and heating and plasticizing: Cover the upper cover and pressurize the internal mixing, and gradually heat up to 110-160℃ through the large amount of heat generated by the rotor shearing;

[0073] S213. Raise the cover and open the mixing for 3-5min to mix, plasticize and shear, and cool down;

[0074] S214. Pressing and heating again and plasticizing;

[0075] S215 adding the remaining light calcium carbonate, crushing and discharging; completing the preheating of the internal mixer;

[0076] S216 after the discharge of the grinding base material in the three-roll mill grinding several times, the heat generated by shear friction heating roller to the product required processing temperature, the grinding base material after grinding removed standby;

[0077] S22. Preparation of solid pre-dispersed pigments:

[0078] S221. Mixing materials at room temperature: Pour the pigment, dispersant and ground base into the preheated internal mixer, turn on the rotor and mix the materials thoroughly;

[0079] S222. Pressing and heating and plasticizing: Cover the upper cover and pressurize the internal mixing, and gradually heat up to 110-160℃ through the large amount of heat generated by the rotor shearing.

[0080] S223. Raise the cover and open the mixing for 3-5min to further mix, plasticize and shear, and cool;

[0081] S224. Pressing and heating again and plasticizing;

[0082] S225. After crushing or cutting, the material is discharged to obtain a block semi-finished product;

[0083] S226 block semi-finished product in the preheated three-roll mill grinding several times to obtain a cloth-like solid pre-dispersed pigment;

[0084] S227. The cloth-like solid pre-dispersed pigment is crushed into a fine powder to obtain the solid pre-dispersed pigment;

[0085] The present invention also comprises a gravure printing ink prepared by using the color ink, which comprises the following components in parts by weight: 10-50 parts of color ink, 5-40 parts of varnish, and 5-80 parts of diluent.

[0086] Preferably, the varnish is a color ink carrier, and the diluent is a first mixed solvent.

[0087] In the following examples, the components used are specifically:

[0088] Diisopropylbenzene peroxide, Anhui Xiangyun Rubber & Plastic Co., Ltd., Molecular formula: C 18 H 22 O2, CAS No.: 80-43-3;

[0089] Polymethyl methacrylate resin: PMMA for short, CAS No.: 25188-98-1;

[0090] Hanhua CP-450: Vinyl chloride-vinyl acetate copolymer, CAS NO: 9003-22-9;

[0091] Hanhua CP-700: Vinyl chloride-vinyl acetate copolymer, CAS NO: 9003-22-9;

[0092] Castor oil polyoxyethylene ether: Liaoyang Aoke Polyether Co., Ltd., EL-20 type, CAS No.: 61791-12-6;

[0093] Epoxidized soybean oil, Guangzhou Haierma Vegetable Oil Co., Ltd., HM-01A, CAS No.: 8013-07-8;

[0094] 3,4-Epoxycycloethylmethyl-3,4-epoxycycloethylcarboxylate, Jiangsu Taitel New Material Technology Co., Ltd., TTA21S, CAS No.: 2386-87-0;

[0095] Inorganic pigment W-6: Longbaizhi R-996 International Pigment Index Number CI Pigment White 6, CAS NO:13463-67-7;

[0096] Inorganic pigment BK-7: DEGUSSA BP900 International Pigment Index Number CI Pigment Black 7, CASNO: 1333-86-4;

[0097] Organic pigment G-7: DIC sunfast 264-7700, International Pigment Index Number CI Pigment Green 7, CAS NO: 1328-53-6;

[0098] Light calcium carbonate, Dongguan Limao Chemical Co., Ltd., 2000 mesh, CAS NO: 471-34-1;

[0099] Calcium zinc heat stabilizer, Beijing Pims Chemical Co., Ltd., CZ9690, CAS No: 1592-23-0.

[0100] Implementation preparation equipment preheating

[0101] The grinding base material comprises: 10-60 parts of vinyl chloride and vinyl acetate binary copolymer, 2-10 parts of heat stabilizer, 5-40 parts of environmentally friendly plasticizer and 3-80 parts of light calcium carbonate.

[0102] Preheating of the internal mixer: Pour all the vinyl chloride-vinyl acetate binary copolymer, heat stabilizer, environmentally friendly plasticizer and part of the light calcium carbonate in the grinding base into the internal mixer, turn on the rotor, and mix the materials thoroughly; cover the upper cover and pressurize the internal mixer, and gradually heat up to 110-160℃ through the large amount of heat generated by the rotor shearing; lift the upper cover, open the mixer and mix for 3-5 minutes to mix, plasticize and shear, and cool down; pressurize again to increase the temperature and plasticize; add the remaining light calcium carbonate, and discharge the material after breaking it; complete the preheating of the internal mixer;

[0103] Preheating of three-roller mill: The discharged grinding base material is ground several times in the three-roller mill. The heat generated by shear friction raises the roller temperature to the processing temperature required by the product, and the ground grinding base material is taken out for use.

[0104] In the following embodiments, the vinyl chloride-vinyl acetate copolymer, heat stabilizer, environmentally friendly plasticizer, and light calcium carbonate used in the preparation of solid pre-dispersed pigments can be either new raw materials or recycled grinding base materials after preheating and use of the above-mentioned equipment, or recycled grinding base materials mixed with new raw materials. Example

[0105] 1.1 Preparation of ink carrier Z-1

[0106]

[0107] Add the components in Table 1.1 to the reaction kettle, heat to 75°C with stirring and keep warm for 5 hours, filter to obtain the ink carrier Z-1. Add the components in Table 1.1 to the reaction kettle, heat to 75°C with stirring and keep warm for 5 hours, filter to obtain the ink carrier Z-1.

[0108] 1.2 Preparation of heat stabilizer R-1

[0109] Mix the components in Table 1.2 thoroughly to obtain heat stabilizer R-1, which is ready for use.

[0110] 1.3 Preparation of dispersant F-1

[0111]

[0112] According to the content of each component in Table 1.3, first use part of ethyl acetate to dissolve diisopropylbenzene peroxide into a diisopropylbenzene peroxide solvent with a weight fraction of 5% for standby use; then add butanone and toluene to the reactor and slowly heat it to 60°C; then add polymethyl methacrylate resin to the reactor, stir and heat it to 120°C, and maintain for 10 minutes until the polymethyl methacrylate resin is completely dissolved; slowly add the prepared diisopropylbenzene peroxide solvent to the reactor and keep it at 120°C for 10 minutes; then cool the reactor to 60°C, add the remaining ethyl acetate and polyoxyethylene ether; finally, continue to cool the reactor to 40°C, filter and obtain dispersant F-1 for standby use.

[0113] 1.4 Preparation of solid pre-dispersed pigment Y-1

[0114]

[0115] According to the content of each component in Table 1.4, pour each component into a shear-type falling mixer, turn on the rotor, and mix the materials thoroughly; cover the upper cover and pressurize and knead, and gradually increase the temperature to 140°C; raise the upper cover, open and knead for 5 minutes, then cover the upper cover and pressurize and knead, and gradually increase the temperature to 140°C; raise the upper cover, open and knead for 5 minutes; discharge the material after crushing or cutting, and grind, tablet press and crush the discharge material to obtain solid pre-dispersed pigment Y-1.

[0116] 1.5 Preparation of ink S-1

[0117]

[0118] Add the components in Table 1.5 into a stirring barrel in sequence, stir at a low speed of 100 R / min for 0.5 h, then at a high speed of 2000 R / min for 1.5 h, and adjust the viscosity to obtain ink S-1.

[0119]

[0120] Add the components in Table 1.6 into a mixing barrel in sequence, stir evenly and adjust the viscosity to obtain gravure printing ink M-1.

[0121] Example 2

[0122] 2.1 Preparation of ink carrier Z-2

[0123]

[0124] Add the components in Table 2.1 to the reaction kettle, heat to 75°C with stirring and keep warm for 5 hours, filter, and obtain the ink carrier Z-2.

[0125] 2.2 Preparation of heat stabilizer R-2

[0126]

[0127] Mix the components in Table 2.2 thoroughly and evenly to prepare heat stabilizer R-2, which is set aside.

[0128] 2.3 Preparation of dispersant F-2

[0129]

[0130] According to the content of each component in Table 2.3, first use part of ethyl acetate to dissolve diisopropylbenzene peroxide into a diisopropylbenzene peroxide solvent with a weight fraction of 5% for standby use; then add butanone and toluene to the reactor and slowly heat it to 60°C; then add polymethyl methacrylate resin into the reactor, stir and heat it to 120°C, and maintain for 10 minutes until the polymethyl methacrylate resin is completely dissolved; slowly add the prepared diisopropylbenzene peroxide solvent to the reactor and keep it at 120°C for 10 minutes; then cool the reactor to 60°C, add the remaining ethyl acetate and polyoxyethylene ether; finally, continue to cool the reactor to 40°C, filter and obtain dispersant F-2 for standby use.

[0131] 2.4 Preparation of solid pre-dispersed pigment Y-2

[0132] According to the content of each component in Table 2.4, pour each component into a shear-type falling mixer, turn on the rotor, and mix the materials thoroughly; cover the upper cover and pressurize and knead, and gradually increase the temperature to 140°C; raise the upper cover, open and knead for 5 minutes, then cover the upper cover and pressurize and knead, and gradually increase the temperature to 140°C; raise the upper cover, open and knead for 5 minutes; discharge the material after crushing or cutting, and grind, tablet press and crush the discharge material to obtain solid pre-dispersed pigment Y-2.

[0133] 2.5 Preparation of ink S-2

[0134]

[0135] Add the components in Table 2.5 into a stirring barrel in sequence, stir at a low speed of 100 R / min for 0.5 h, then at a high speed of 2000 R / min for 1.5 h, and adjust the viscosity to obtain ink S-2.

[0136]

[0137] Add the components in Table 2.6 into the mixing bucket in sequence, stir evenly and adjust the viscosity to obtain the gravure printing ink M-2.

[0138] Example 3

[0139] 3.1 Preparation of ink carrier Z-3

[0140]

[0141] Add the components in Table 3.1 into the reaction kettle, heat to 80°C with stirring and keep warm for 4 hours, filter, and obtain the ink carrier Z-3.

[0142] 3.2 Preparation of thermal stabilizer R-3

[0143]

[0144] Mix the components in Table 3.2 thoroughly and evenly to prepare heat stabilizer R-3, and set aside.

[0145] 3.3 Preparation of dispersant F-3

[0146]

[0147] According to the content of each component in Table 3.3, first use part of methyl acetate to dissolve diisopropylbenzene peroxide into a diisopropylbenzene peroxide solvent with a weight fraction of 5% for standby use; then add butanone and toluene to the reactor and slowly heat it to 60°C; then add polymethyl methacrylate resin into the reactor, stir and heat it to 125°C, and maintain for 30 minutes until the polymethyl methacrylate resin is completely dissolved; slowly add the prepared diisopropylbenzene peroxide solvent to the reactor and keep it at 125°C for 30 minutes; then cool the reactor to 60°C, add the remaining methyl acetate and polyoxyethylene ether; finally, continue to cool the reactor to 40°C, filter and obtain dispersant F-3 for standby use.

[0148] 3.4 Preparation of solid pre-dispersed pigment Y-3

[0149]

[0150] According to the content of each component in Table 3.4, pour each component into a shear-type falling mixer, turn on the rotor, and mix the materials thoroughly; cover the upper cover and pressurize the mixer, gradually increase the temperature to 160°C; raise the upper cover, open and mix for 5 minutes; discharge the material after crushing or cutting, and grind, tablet press and crush the discharge material to obtain solid pre-dispersed pigment Y-3.

[0151] 3.5 Preparation of ink S-3

[0152]

[0153] Add the components in Table 3.5 into a stirring barrel in sequence, stir at a low speed of 150 R / min for 0.3 h, then at a high speed of 3000 R / min for 1 h, and adjust the viscosity to obtain ink S-3.

[0154]

[0155] Add the components in Table 3.6 into the mixing bucket in sequence, stir evenly and adjust the viscosity to obtain the gravure printing ink M-3.

[0156] Example 4

[0157] 4.1 Preparation of ink carrier Z-4

[0158]

[0159] Add the components in Table 4.1 to the reaction kettle, heat to 85°C with stirring and keep warm for 2.5 hours, filter, and obtain the ink carrier Z-4.

[0160] 4.2 Preparation of heat stabilizer R-4

[0161]

[0162] Mix the components in Table 4.2 thoroughly to obtain heat stabilizer R-4, which is ready for use.

[0163] 4.3 Preparation of dispersant F-4

[0164]

[0165] According to the content of each component in Table 4.3, first use part of ethyl acetate to dissolve diisopropylbenzene peroxide into a diisopropylbenzene peroxide solvent with a weight fraction of 5% for standby use; then add ketone strong solvent and benzene diluent to the reactor, slowly raise the temperature to 55°C; then add polymethyl methacrylate resin to the reactor, stir and heat to 125°C, maintain for 30 minutes until the polymethyl methacrylate resin is completely dissolved; slowly add the prepared diisopropylbenzene peroxide solvent to the reactor, and keep it at 125°C for 30 minutes; then cool the reactor to 60°C, add the remaining ethyl acetate and polyoxyethylene ether; finally, continue to cool the reactor to 40°C, filter and obtain dispersant F-4 for standby use.

[0166] 4.4 Preparation of solid pre-dispersed pigment Y-4

[0167]

[0168] According to the content of each component in Table 4.4, pour each component into a shear-type falling mixer, turn on the rotor, and mix the materials thoroughly; cover with the upper cover and pressurize and knead, gradually increase the temperature to 120°C; raise the upper cover, open and mix for 3 minutes, then cover with the upper cover and pressurize and knead, gradually increase the temperature to 120°C; raise the upper cover, open and mix for 3 minutes, and repeat this process 3 times; crush or cut into pieces and discharge the material, grind, tablet and crush the material to obtain solid pre-dispersed pigment Y-4.

[0169] 4.5 Preparation of ink S-4

[0170]

[0171] Add the components in Table 4.5 into a stirring barrel in sequence, stir at a low speed of 200 R / min for 0.2 h, then at a high speed of 3500 R / min for 1 h, and adjust the viscosity to obtain ink S-4.

[0172]

[0173] Add the components in Table 4.6 into the mixing bucket in sequence, stir evenly and adjust the viscosity to obtain gravure printing ink M-4.

[0174] Example 5

[0175] 5.1 Preparation of ink carrier Z-5

[0176]

[0177] Add the components in Table 5.1 to the reaction kettle, heat to 90°C with stirring and keep warm for 2 hours, filter, and obtain the ink carrier Z-5.

[0178] 5.2 Preparation of heat stabilizer R-5

[0179]

[0180] Mix the components in Table 5.2 thoroughly and evenly to prepare heat stabilizer R-5, and set aside.

[0181] 5.3 Preparation of Dispersant F-5

[0182]

[0183] According to the content of each component in Table 5.3, first use part of ethyl acetate to dissolve diisopropylbenzene oxide into a 5% by weight diisopropylbenzene peroxide solvent for use; then add ketone strong solvent and benzene diluent to the reactor, slowly raise the temperature to 50°C; then add polymethyl methacrylate resin to the reactor, stir and heat to 125°C, maintain for 10 minutes until the polymethyl methacrylate resin is completely dissolved; slowly add the prepared diisopropylbenzene peroxide solvent to the reactor, and keep it at 125°C for 10 minutes; then cool the reactor to 60°C, add the remaining ethyl acetate and polyoxyethylene ether; finally, continue to cool the reactor to 40°C, filter and obtain dispersant F-5 for use.

[0184] 5.4 Preparation of solid pre-dispersed pigment Y-5

[0185]

[0186] According to the content of each component in Table 5.4, pour each component into a shear-type falling mixer, turn on the rotor, and mix the materials thoroughly; cover the upper cover and pressurize the mixer, gradually increase the temperature to 160°C; raise the upper cover, open and mix for 5 minutes; discharge the material after crushing or cutting, and grind, tablet and crush the discharged material to obtain solid pre-dispersed pigment Y-5.

[0187] 5.5 Preparation of ink S-5

[0188]

[0189] Add the components in Table 5.5 into a stirring barrel in sequence, stir at a low speed of 250 R / min for 0.1 h, then at a high speed of 4000 R / min for 0.5 h, and adjust the viscosity to obtain ink S-5.

[0190]

[0191] Add the components in Table 5.6 into the mixing bucket in sequence, stir evenly and adjust the viscosity to obtain gravure printing ink M-5.

[0192] Example 6

[0193] Take equal weight portions of color ink carriers Z-1 to Z-5 respectively, and compare them with equal weight portions of commercially available varnish oil, and the following table is obtained:

[0194]

[0195] Example 7

[0196] Equal weight portions of gravure printing inks M-1 to M-5 were taken respectively, and printed with equal weight portions of commercially available gravure printing inks A1 (the pigment component of A1 is inorganic pigment W-6), A2 (the pigment component of A2 is inorganic pigment BK-7), and A3 (the pigment component of A3 is organic pigment G-7) containing the same weight portions of pigments to obtain PVC decorative films. The following table was obtained after testing and comparison.

[0197]

[0198]

[0199] Tinting strength: reflects the overall fineness of the pigment. Based on the comparison ratio, the higher the value, the higher the fineness. The same weight of pigment will produce a stronger color.

[0200] Maximum particle size: the largest particle that can be measured macroscopically in the mixture, in μm, using the scraper fineness meter method. The smaller the maximum particle size, the better.

[0201] Vividness: The saturation of the color, the brighter the better; for white, it is reflected by blue light being good and yellow light being bad; for black, it is reflected by blackness and brightness, the darker the better and the brighter the better;

[0202] Low temperature stability: The stability of the ink during storage and transportation in low temperature climates should not show precipitation, stratification, agglomeration, etc. It is usually tested under accelerated conditions, which is -5℃*40 days;

[0203] High temperature stability: The stability of the ink during storage and transportation in high temperature climates should not show precipitation, stratification, agglomeration, etc. It is usually tested under accelerated conditions, which are 40℃*40 days.

[0204] Adhesion test method: print the color ink carrier (or ink) on the base film in equal parts by weight, dry it, and then attach it to the mask. Test the peel strength according to GBT 2791-1995 Adhesive T peel strength test method - flexible material to flexible material. The higher the peel strength, the better the adhesion.

[0205] It can be seen from the above test results that the color ink carrier prepared by the present invention is not lower than the commercially available color ink carrier in terms of dispersion stability, but is far superior to the commercially available varnish in terms of adhesion performance, and the gravure printing ink prepared by the color ink carrier prepared by the present invention has better performance in terms of color brightness and adhesion. By comparing the application examples of Y-1 and Y-2, it can be seen that by adding a composite heat stabilizer of 3,4-epoxycycloethylmethyl-3,4-epoxycycloethylcarboxylate, there is a synergistic heat-resistant effect, and the solid pre-dispersed pigment obtained by utilizing its synergistic heat-resistant effect has a better use effect; whether it is a color ink carrier, a solid pre-dispersed pigment, or a gravure printing ink, there is no need to go through an expensive and inefficient grinding process like commercially available products in the preparation process. After calculation, the gravure printing ink prepared by the present invention is only 40%-45% of the commercially available gravure printing ink. The gravure printing ink of the present invention is applied to production, which can greatly reduce the production cost.

[0206] 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 of these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A color ink carrier, characterized in that: The composition comprises the following components in parts by weight: 100-600 parts of vinyl chloride and vinyl acetate copolymer, Polyvinyl chloride 0-600 parts, 330-960 parts of the first mixed solvent, 1-3 parts of defoaming agent, Phosphoric acid 0.1-2 parts; The first mixed solvent is formed by mixing a first strong solvent, a first weak solvent and a first diluent; the first strong solvent is a ketone solvent, the first weak solvent is an ester solvent, and the first diluent is toluene or propylene glycol methyl ether acetate.

2. The ink carrier according to claim 1, characterized in that: The average polymerization degree of the VC / VAC vinyl chloride and vinyl acetate copolymer is 400-700.

3. The ink carrier according to claim 1, characterized in that: The polymerization degree of the PVC polyvinyl chloride is 600-1000.

4. A color ink prepared using the color ink carrier according to any one of claims 1 to 3, characterized in that: The composition comprises the following components in parts by weight: 20-40 parts of ink carrier, 5-40 parts of solid pre-dispersed pigment, The solid pre-dispersed pigment is prepared by including the following components in parts by weight: Pigment 3-80 parts, 3-30 parts of dispersant, Grinding base 20-190 parts, The grinding mill material is prepared from the following components in parts by weight: Vinyl chloride and vinyl acetate copolymer 10-60 parts, Heat stabilizer 2-10 parts, Environmentally friendly plasticizer 5-40 parts, 3-80 parts of light calcium carbonate.

5. The color ink according to claim 4, characterized in that: The thermal stabilizer is prepared from the following components in parts by weight: Calcium zinc heat stabilizer 0.3-3 parts, Epoxidized soybean oil 0.3-3 parts, Epoxy resin 0.3-3 parts.

6. The color ink according to claim 5, characterized in that: The epoxy resin in the heat stabilizer is 3,4-epoxycycloethylmethyl-3,4-epoxycycloethylcarboxylate.

7. The color ink according to claim 4, characterized in that: The environmentally friendly plasticizer is epoxidized soybean oil; the epoxide value of the epoxidized soybean oil is ≥6.5 and the iodine value is ≤3.

0.

8. The color ink according to claim 4, characterized in that: The fineness of the light calcium carbonate is 2000-3000 mesh.

9. The color ink according to claim 4, characterized in that: The dispersant is prepared by including the following components in parts by weight: 810-1620 parts of polymethyl methacrylate resin, 0.27-135 parts of dicumyl peroxide, 1079.73-1755 parts of the second mixed solvent; The second mixed solvent is formed by mixing a second strong solvent, a second weak solvent and a second diluent; the second strong solvent is a ketone solvent, the second weak solvent is an ester solvent, and the second diluent is toluene or propylene glycol methyl ether acetate.

10. The color ink according to claim 9, characterized in that: The dispersant also includes 270-1080 parts by mass of polyoxyethylene ether.

11. The method for preparing the color ink according to claim 4, comprising the following steps: S1. Preparation of ink carrier: In a reaction vessel, the ink carrier components were added and heated to 70-90 ° C and kept warm for 2-5h under stirring conditions, and filtered to obtain the ink carrier; S2. Preparation of ink: Add the ink carrier and solid pre-dispersed pigment prepared in S1 into a stirring barrel in sequence, stir at a low speed for 0.1-0.5h, then stir at a high speed for 0.5-2h, and adjust the viscosity to obtain the ink.

12. The preparation method according to claim 11, characterized in that: In step S2, the low-speed stirring speed is 50-300 R / min, and the high-speed stirring speed is 300-10000 R / min.

13. A gravure printing ink prepared by using the color ink according to claim 4, characterized in that: The composition comprises the following components in parts by weight: Color ink 10-50 parts, 5-40 parts of varnish, 5-80 parts of diluent; The varnish is a color ink carrier, and the diluent is a first mixed solvent.

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