Water-based ink for printing PETG floor film and preparation method of water-based ink

Abstract

The invention discloses water-based ink for PETG floor film printing and a preparation method of the water-based ink. The water-based ink is prepared from 29.6%-41.4% of water-soluble acrylic resin, 17.7% of deionized water, 6%-17.7% of absolute ethyl alcohol, 6%-11.8% of triethylamine, 11.8%-35.5% of modified pigment and 1.1%-3.5% of auxiliaries. The water-soluble acrylic resin is used as a raw material, the prepared film has remarkable advantages in the aspects of glossiness, heat resistance, water resistance, chemical resistance and pollution resistance, meanwhile, the content of VOC is greatly reduced, the film is environmentally friendly and practical, and meanwhile, the film has extremely high adhesive force due to the addition of the PH value stabilizer.

Description

Technical Field

[0001] The invention relates to a water-based ink for printing PETG floor films and a preparation method thereof, and belongs to the technical field of surface decoration materials. Background Art

[0002] With the continuous progress of polymer material technology in my country, plastic products have become an indispensable part of modern life. Plastic products are widely used in various industries due to their excellent processing performance, weather resistance and corrosion resistance, especially in the field of surface decoration materials. Among many plastic materials, copolyester PETG has attracted much attention due to its excellent properties, and its market prospects are quite broad.

[0003] PETG polyethylene terephthalate is a highly transparent plastic material with good gloss and excellent blistering ability. Compared with other plastics, PETG does not release harmful gases during use, which makes it particularly suitable for making decorative films. In recent years, the application of PETG printed film products in home decoration, furniture, commercial display and other fields has gradually increased. Because it not only provides visual beauty, but also has excellent physical properties, it has become the first choice of many consumers.

[0004] However, despite the increasing application of PETG film in the market, the current status of its printing process faces multiple challenges. Traditionally, the printing of PETG film mainly relies on solvent-based inks. Although this printing method has certain advantages in color performance and pattern details, it also brings many safety hazards and environmental problems. The main component of solvent-based ink is organic solvent, which will produce volatile organic compounds (VOC) during the drying process. These compounds not only pollute the environment, but also pose a threat to the health of operators.

[0005] In order to solve the problems of environmental pollution and safety hazards, the industry has begun to explore water-based inks as an alternative. Compared with solvent-based inks, water-based inks have low VOC emissions and are safer, and are theoretically a more environmentally friendly option. However, despite the advantages of water-based inks in terms of environmental protection, they actually face many difficulties in use. First, the color development of water-based inks is often not as good as that of solvent-based inks, especially when printing requires rich colors and high saturation, the performance of water-based inks is often insufficient.

[0006] In addition, the adhesion of water-based ink is also an urgent problem to be solved. Since the surface of PETG film is relatively smooth, the adhesion of water-based ink is not strong, which makes the printed pattern easy to fall off and scratch. This defect not only affects the aesthetics of the product, but also directly affects the service life of the product, bringing potential inconvenience to consumers. Especially in some application scenarios that require resistance to alcohol and other chemicals, the chemical resistance of water-based ink is insufficient, which limits its application scope. Summary of the invention

[0007] Purpose of the invention: In view of the shortcomings of the prior art, the present invention provides a water-based ink for printing PETG floor film and a preparation method thereof. The present invention uses water-soluble acrylic resin as a raw material to prepare a water-based ink with high adhesion and good color development that can be finely printed on PETG film.

[0008] Technical solution: A water-based ink for printing PETG floor film, including: 29.6%-41.4% water-soluble acrylic resin, 17.7% deionized water, 6%-17.7% anhydrous ethanol, 6%-11.8% triethylamine, 11.8%-35.5% modified pigment, and 1.1%-3.5% additive; The water-soluble acrylic resin comprises: 17.2%-24% isopropyl alcohol, 11.8%-16.5% monomer, and 0.4%-0.8% surfactant and initiator; The monomers include acrylic acid, methyl methacrylate, isooctyl acrylate, and butyl acrylate, and the mass ratio thereof is 1:8:27:4; The surfactant includes sodium lauryl sulfate and emulsifier TX-100; the initiator includes azobisisobutyronitrile; The mass ratio of the surfactant to the initiator is 1:1; the mass ratio of the sodium dodecyl sulfate to the emulsifier TX-100 is 1:1; The triethylamine comprises: acetaldehyde 0.7%-1.4%, hydrogen 1.7%-3.3%, ammonia 3.6%-7%; The auxiliary agents include: defoamer, pH stabilizer, dispersant, leveling agent, film-forming agent, thickener; and the mass ratio of the auxiliary agents is 1:1.

[0009] A method for preparing water-based ink for printing PETG floor film, comprising the following steps: S1: Pour deionized water, anhydrous ethanol and triethylamine into a reaction kettle, and stir at a speed of 200-400 r / min for 5-10 min to obtain a mixed solution; S2: prepare a water-soluble acrylic resin and pour it into the mixed solution obtained in S1, stir it at a temperature of 50-60°C and a speed of 200-400 r / min for 25-30 minutes, and let it stand for 15-25 minutes; S3: Pour in the additive, stir at 50-60°C and 300-500r / min for 5-10min, add the modified pigment at the same time, stir for 5-8min, and let stand to obtain the water-based ink.

[0010] Preferably, the specific steps of preparing the water-soluble acrylic resin in S2 are: S201: Put sodium lauryl sulfate, emulsifier TX-100 and deionized water into a reaction kettle, dissolve and stir them evenly, and then control the temperature at room temperature; S202: adding acrylic acid, methyl methacrylate, isooctyl acrylate and butyl acrylate to the solution in S201, stirring evenly to form a pre-emulsified mixed monomer and then taking it out; S203: adding isopropanol to the reaction kettle and heating it, adding part of the pre-emulsified mixed monomer after heating, adding azobisisobutyronitrile after stirring, and then adding the remaining pre-emulsified mixed monomer dropwise to the isopropanol for polymerization, adding azobisisobutyronitrile and deionized water during the polymerization process to obtain a polymerization-completed solution; S204: Purify the solution after the polymerization using a filter, adjust the pH value using ammonia water, and finally obtain a water-soluble acrylic resin copolymer emulsion.

[0011] Preferably, the preparation steps of triethylamine in S1 are specifically as follows: Acetaldehyde is placed in a reaction kettle and heated to 80-85°C to vaporize it, and then hydrogen and ammonia are sent into the reaction kettle, and a nickel catalyst is added to react at a reaction temperature of 105-200°C. After reacting for 10-15 minutes, the reaction gas is cooled at a temperature of -8 to -5°C, and triethylamine is obtained after separation.

[0012] Preferably, the stirring speed in S201 is 500-600 r / min, and the room temperature is 20-25° C.; Preferably, the stirring speed in S202 is 500-800 r / min.

[0013] Preferably, in S203, the stirring speed is 500-800 r / min, the stirring time is 20-30 min, the added part of the pre-emulsified mixed monomer is 8-10% of the total amount, and the remaining pre-emulsified mixed monomer is added dropwise at a rate of 0.03-0.10 g / min.

[0014] Preferably, the time interval for adding azobisisobutyronitrile and deionized water in S203 is 8-10 minutes.

[0015] Preferably, in S204, the pH value is adjusted using aqueous ammonia, specifically, using 10% aqueous ammonia to adjust the pH value to 7-8.

[0016] Beneficial effects: The film prepared by the present invention using water-soluble acrylic resin as raw material has significant advantages in gloss, heat resistance, water resistance, chemical resistance and pollution resistance, and at the same time greatly reduces the VOC content, is environmentally friendly and practical, and has extremely strong adhesion due to the addition of pH stabilizer. DETAILED DESCRIPTION

[0017] The embodiments described in the present invention are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0019] In this embodiment, 500g of water-based ink is prefabricated; Example

[0020] A water-based ink for printing PETG floor film, comprising: 148g of water-soluble acrylic resin, 88.5g of deionized water, 30g of anhydrous ethanol, 30g of triethylamine, 59g of modified pigment, and 5.5g of additive; The water-soluble acrylic resin comprises: 86 g of isopropyl alcohol, 59 g of monomer, and 2.5 g of surfactant and initiator; The monomers include acrylic acid, methyl methacrylate, isooctyl acrylate, and butyl acrylate, and the mass ratio thereof is 1:8:27:4; The surfactant includes 0.62 g of sodium dodecyl sulfate and 0.62 g of emulsifier TX-100; the initiator includes 1.25 g of azobisisobutyronitrile; The mass ratio of the surfactant to the initiator is 1:1; The triethylamine comprises: 3.5 ml of acetaldehyde, 18 ml of hydrogen, and 8.5 ml of ammonia; The auxiliary agents include: 1.92g of defoamer, 1.92g of pH stabilizer, 1.92g of dispersant, 1.92g of leveling agent, 1.92g of film-forming agent, and 1.92g of thickener; and the mass ratio thereof is 1:1.

[0021] A method for preparing water-based ink for printing PETG floor film, comprising the following steps: S1: Pour deionized water, anhydrous ethanol and triethylamine into a reaction kettle and stir at 200 r / min for 10 min to obtain a mixed solution; The preparation steps of triethylamine in S1 are specifically as follows: Acetaldehyde is placed in a reactor and heated to 80°C to vaporize it. Then hydrogen and ammonia are sent into the reactor and a nickel catalyst is added to react at a temperature of 105°C. After reacting for 10 minutes, the reaction gas is cooled at -8°C and triethylamine is obtained after separation.

[0022] S2: prepare a water-soluble acrylic resin and pour it into the mixed solution obtained in S1, stir at 50°C and 200 r / min for 30 min, and let it stand for 25 min; The specific steps of preparing the water-soluble acrylic resin in S2 are: S201: Sodium dodecyl sulfate, emulsifier TX-100 and deionized water are placed in a reaction kettle, dissolved and stirred evenly, and the temperature is controlled at room temperature; the stirring speed is 500r / min, and the room temperature is 20°C; S202: Add acrylic acid, methyl methacrylate, isooctyl acrylate and butyl acrylate into the solution in S201, stir evenly to form a pre-emulsified mixed monomer and then take it out; the stirring speed is 500 r / min; S203: adding isopropanol to the reaction kettle and heating it, adding part of the pre-emulsified mixed monomer after heating, adding azobisisobutyronitrile after stirring, and then adding the remaining pre-emulsified mixed monomer dropwise to the isopropanol for polymerization, adding azobisisobutyronitrile and deionized water during the polymerization process to obtain a polymerization-completed solution; The stirring speed is 500 r / min, the stirring time is 30 min, the part of the pre-emulsified mixed monomer added is 8-10% of the total amount, and the remaining pre-emulsified mixed monomer is added dropwise at a rate of 0.03-0.10 g / min; the time interval for adding azobisisobutyronitrile and deionized water is 8 min; S204: Purify the solution after the polymerization using a filter, adjust the pH value thereof using 10% ammonia water to a pH value of 7-8, and finally obtain a water-soluble acrylic resin copolymer emulsion.

[0023] S3: Pour the additives, stir at 50°C and 300r / min for 10 minutes, add the modified pigment, stir for 8 minutes, and let stand to obtain the water-based ink. Example

[0024] A water-based ink for printing PETG floor film, comprising: 177.5 g of water-soluble acrylic resin, 88.5 g of deionized water, 59.2 g of anhydrous ethanol, 44.5 g of triethylamine, 118 g of modified pigment, and 11.5 g of additive; The water-soluble acrylic resin includes: 103 g of isopropyl alcohol, 70.7 g of monomer, and 3.25 g of surfactant and initiator; The monomers include acrylic acid, methyl methacrylate, isooctyl acrylate, and butyl acrylate, and the mass ratio thereof is 1:8:27:4; The surfactant includes 0.8 g of sodium dodecyl sulfate and 0.8 g of emulsifier TX-100; the initiator includes 1.6 g of azobisisobutyronitrile; The mass ratio of the surfactant to the initiator is 1:1; The triethylamine comprises: 5.2 ml of acetaldehyde, 26.5 ml of hydrogen, and 12.5 ml of ammonia; The auxiliary agents include: 1.92g of defoamer, 1.92g of pH stabilizer, 1.92g of dispersant, 1.92g of leveling agent, 1.92g of film-forming agent, and 1.92g of thickener; and the mass ratio thereof is 1:1.

[0025] A method for preparing water-based ink for printing PETG floor film, comprising the following steps: S1: Pour deionized water, anhydrous ethanol and triethylamine into a reaction kettle and stir at 300 r / min for 7 min to obtain a mixed solution; The preparation steps of triethylamine in S1 are specifically as follows: Acetaldehyde is placed in a reactor and heated to 83°C to vaporize it. Then hydrogen and ammonia are sent into the reactor and a nickel catalyst is added to react at a temperature of 108°C. After reacting for 13 minutes, the reaction gas is cooled at -7°C and triethylamine is obtained after separation.

[0026] S2: prepare a water-soluble acrylic resin and pour it into the mixed solution obtained in S1, stir it at a temperature of 55°C and a speed of 300 r / min for 28 minutes, and let it stand for 22 minutes; The specific steps of preparing the water-soluble acrylic resin in S2 are: S201: Sodium dodecyl sulfate, emulsifier TX-100 and deionized water are placed in a reaction kettle, dissolved and stirred evenly, and the temperature is controlled at room temperature; the stirring speed is 550r / min, and the room temperature is 23°C; S202: adding acrylic acid, methyl methacrylate, isooctyl acrylate and butyl acrylate to the solution in S201, stirring evenly to form a pre-emulsified mixed monomer and then taking it out; the stirring speed is 650 r / min; S203: adding isopropanol to the reaction kettle and heating it, adding part of the pre-emulsified mixed monomer after heating, adding azobisisobutyronitrile after stirring, and then adding the remaining pre-emulsified mixed monomer dropwise to the isopropanol for polymerization, adding azobisisobutyronitrile and deionized water during the polymerization process to obtain a polymerization-completed solution; The stirring speed is 650 r / min, the stirring time is 25 min, the part of the pre-emulsified mixed monomer added is 8-10% of the total amount, and the remaining pre-emulsified mixed monomer is added dropwise at a rate of 0.03-0.10 g / min; the time interval for adding azobisisobutyronitrile and deionized water is 9 min; S204: Purify the solution after the polymerization using a filter, adjust the pH value thereof using 10% ammonia water to a pH value of 7-8, and finally obtain a water-soluble acrylic resin copolymer emulsion.

[0027] S3: Pour the additives, stir at 55°C and 400r / min for 7 minutes, add the modified pigment, stir for 6.5 minutes, and let stand to obtain the water-based ink. Example

[0028] A water-based ink for printing PETG floor film, comprising: 207 g of water-soluble acrylic resin, 88.5 g of deionized water, 88.5 g of anhydrous ethanol, 59 g of triethylamine, 177 g of modified pigment, and 17.5 g of additive; The water-soluble acrylic resin comprises: 120 g of isopropyl alcohol, 82.5 g of monomer, and 4 g of surfactant and initiator; The monomers include acrylic acid, methyl methacrylate, isooctyl acrylate, and butyl acrylate, and the mass ratio thereof is 1:8:27:4; The surfactant includes 1g of sodium dodecyl sulfate and 1g of emulsifier TX-100; the initiator includes 2g of azobisisobutyronitrile; The mass ratio of the surfactant to the initiator is 1:1; The triethylamine comprises: 7 ml of acetaldehyde, 35 ml of hydrogen, and 16.5 ml of ammonia; The auxiliary agents include: 2.92g of defoamer, 2.92g of pH stabilizer, 2.92g of dispersant, 2.92g of leveling agent, 2.92g of film-forming agent, and 2.92g of thickener; and the mass ratio thereof is 1:1.

[0029] A method for preparing water-based ink for printing PETG floor film, comprising the following steps: S1: Pour deionized water, anhydrous ethanol and triethylamine into a reaction kettle and stir at 400 r / min for 5 min to obtain a mixed solution; The preparation steps of triethylamine in S1 are specifically as follows: Acetaldehyde is placed in a reactor and heated to 85°C to vaporize it. Then hydrogen and ammonia are sent into the reactor and a nickel catalyst is added to react at a temperature of 200°C. After reacting for 15 minutes, the reaction gas is cooled at -5°C and triethylamine is obtained after separation.

[0030] S2: prepare a water-soluble acrylic resin and pour it into the mixed solution obtained in S1, stir it at 60°C and 400r / min for 25min, and let it stand for 15min; The specific steps of preparing the water-soluble acrylic resin in S2 are: S201: Sodium dodecyl sulfate, emulsifier TX-100 and deionized water are placed in a reaction kettle, dissolved and stirred evenly, and the temperature is controlled at room temperature; the stirring speed is 600r / min, and the room temperature is 25°C; S202: adding acrylic acid, methyl methacrylate, isooctyl acrylate and butyl acrylate to the solution in S201, stirring evenly to form a pre-emulsified mixed monomer and then taking it out; the stirring speed is 800 r / min; S203: adding isopropanol to the reaction kettle and heating it, adding part of the pre-emulsified mixed monomer after heating, adding azobisisobutyronitrile after stirring, and then adding the remaining pre-emulsified mixed monomer dropwise to the isopropanol for polymerization, adding azobisisobutyronitrile and deionized water during the polymerization process to obtain a polymerization-completed solution; The stirring speed is 800 r / min, the stirring time is 20 min, the added part of the pre-emulsified mixed monomer is 8-10% of the total amount, and the remaining pre-emulsified mixed monomer is added dropwise at a rate of 0.03-0.10 g / min; the time interval for adding azobisisobutyronitrile and deionized water is 10 min; S204: Purify the solution after the polymerization using a filter, adjust the pH value thereof using 10% ammonia water to a pH value of 7-8, and finally obtain a water-soluble acrylic resin copolymer emulsion.

[0031] S3: Pour in the additive, stir at 60°C and 500r / min for 5 minutes, add the modified pigment at the same time, stir for 5 minutes, and let stand to obtain the water-based ink.

[0032] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water-based ink for printing PETG floor film, It is characterized in that include: Water-soluble acrylic resin 29.6%-41.4%, deionized water 17.7%, anhydrous ethanol 6%-17.7%, triethylamine 6%-11.8%, modified pigment 11.8%-35.5%, additives 1.1%-3.5%; The water-soluble acrylic resin comprises: 17.2%-24% isopropyl alcohol, 11.8%-16.5% monomer, and 0.4%-0.8% surfactant and initiator; The monomers include acrylic acid, methyl methacrylate, isooctyl acrylate, and butyl acrylate, and the mass ratio thereof is 1:8:27:4; The surfactant includes sodium lauryl sulfate and emulsifier TX-100; the initiator includes azobisisobutyronitrile; The mass ratio of the surfactant to the initiator is 1:1; the mass ratio of the sodium dodecyl sulfate to the emulsifier TX-100 is 1:1; The triethylamine comprises: acetaldehyde 0.7%-1.4%, hydrogen 1.7%-3.3%, ammonia 3.6%-7%; The auxiliary agents include: defoamer, pH stabilizer, dispersant, leveling agent, film-forming agent, thickener; and the mass ratio of the auxiliary agents is 1:

1.

2. A method for preparing the water-based ink for printing the PETG floor film according to claim 1, It is characterized in that The following steps are involved: S1: Pour deionized water, anhydrous ethanol and triethylamine into a reaction kettle, and stir at a speed of 200-400 r / min for 5-10 min to obtain a mixed solution; S2: prepare a water-soluble acrylic resin and pour it into the mixed solution obtained in S1, stir at a temperature of 50-60°C and a speed of 200-400 r / min for 25-30 min, and let it stand for 15-25 min; S3: Pour in the additive, stir at a temperature of 50-60°C and a speed of 300-500r / min for 5-10min, add the modified pigment at the same time, stir for 5-8min, and let stand to obtain the water-based ink.

3. The preparation method of water-based ink for PETG floor film printing according to claim 2, It is characterized in that The specific steps of preparing the water-soluble acrylic resin in S2 are: S201: sodium lauryl sulfate, emulsifier TX-100 and deionized water are placed in a reaction kettle, dissolved and stirred evenly, and the temperature is controlled at room temperature; S202: adding acrylic acid, methyl methacrylate, isooctyl acrylate and butyl acrylate to the solution in S201, stirring evenly to form a pre-emulsified mixed monomer and then taking it out; S203: adding isopropanol to the reaction kettle and heating it, adding part of the pre-emulsified mixed monomer after heating, adding azobisisobutyronitrile after stirring, and then adding the remaining pre-emulsified mixed monomer dropwise to the isopropanol for polymerization, adding azobisisobutyronitrile and deionized water during the polymerization process to obtain a polymerization-completed solution; S204: Purify the solution after the polymerization using a filter, adjust the pH value using ammonia water, and finally obtain a water-soluble acrylic resin copolymer emulsion.

4. The preparation method of water-based ink for PETG floor film printing according to claim 3, It is characterized in that The preparation steps of triethylamine in S1 are specifically as follows: Acetaldehyde is placed in a reaction kettle and heated to 80-85°C to vaporize it, and then hydrogen and ammonia are sent into the reaction kettle, and a nickel catalyst is added to react at a reaction temperature of 105-200°C. After reacting for 10-15 minutes, the reaction gas is cooled at a temperature of -8 to -5°C, and triethylamine is obtained after separation.

5. The preparation method of water-based ink for printing PETG floor film according to claim 3, It is characterized in that The stirring speed in S201 is 500-600 r / min, and the room temperature is 20-25°C.

6. The preparation method of water-based ink for PETG floor film printing according to claim 3, It is characterized in that The stirring speed in S202 is 500-800 r / min.

7. The preparation method of water-based ink for printing PETG floor film according to claim 3, It is characterized in that In the S203, the stirring speed is 500-800 r / min, the stirring time is 20-30 min, the added part of the pre-emulsified mixed monomer is 8-10% of the total amount, and the remaining pre-emulsified mixed monomer is added dropwise at a rate of 0.03-0.10 g / min.

8. The method for preparing water-based ink for printing PETG floor film according to claim 3, It is characterized in that The time interval for adding azobisisobutyronitrile and deionized water in S203 is 8-10 minutes.

9. The method for preparing water-based ink for printing PETG floor film according to claim 3, It is characterized in that The step of using ammonia water to adjust the pH value in S204 is specifically to use 10% ammonia water to adjust the pH value to 7-8.