CN113605138B - Aqueous coating liquid for photographic paper, preparation method thereof and printing photographic paper - Google Patents
Aqueous coating liquid for photographic paper, preparation method thereof and printing photographic paper Download PDFInfo
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- CN113605138B CN113605138B CN202110938011.4A CN202110938011A CN113605138B CN 113605138 B CN113605138 B CN 113605138B CN 202110938011 A CN202110938011 A CN 202110938011A CN 113605138 B CN113605138 B CN 113605138B
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- 238000000576 coating method Methods 0.000 title claims abstract description 63
- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 239000007788 liquid Substances 0.000 title claims abstract description 51
- 238000007639 printing Methods 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000003607 modifier Substances 0.000 claims abstract description 25
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 17
- 229920006317 cationic polymer Polymers 0.000 claims abstract description 16
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims abstract description 14
- 239000008234 soft water Substances 0.000 claims abstract description 14
- 239000002216 antistatic agent Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 21
- 229910021485 fumed silica Inorganic materials 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 229920002873 Polyethylenimine Polymers 0.000 claims description 9
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 7
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 7
- -1 polydimethylsiloxane Polymers 0.000 claims description 7
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical group CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000007641 inkjet printing Methods 0.000 abstract description 12
- 238000010521 absorption reaction Methods 0.000 abstract description 11
- 239000000377 silicon dioxide Substances 0.000 abstract description 7
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- 239000000975 dye Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 6
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000007774 anilox coating Methods 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 238000012644 addition polymerization Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/64—Alkaline compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
Abstract
The invention provides an aqueous coating liquid which comprises an ethylene-acrylic acid copolymer, gas-phase silicon dioxide, a modifier, a potassium hydroxide solution, a cationic polymer, an antistatic agent and soft water. The application also provides a preparation method of the aqueous coating liquid and printing photographic paper. The invention provides the aqueous coating liquid capable of improving the ink absorption and color fastness of the photographic paper, and effectively ensures that the image color of the photographic paper after color ink-jet printing is full and true; the ink absorption and fixation performance is excellent, the phenomena of ink piling and ink scattering can not occur, the color fastness of the photo after ink-jet printing is high, and the ink-jet image can not be damaged by immediate arbitrary touch.
Description
Technical Field
The invention relates to the technical field of printing, in particular to an aqueous coating liquid for photographic paper, a preparation method thereof and printing photographic paper.
Background
With the enhancement of environmental protection and energy consciousness of people, particularly the strict limitation of various environmental regulations on the content of Volatile Organic Compounds (VOC) in a coating liquid system, the material safety problem is more and more emphasized by consumers, and therefore, the adhesive and other additives of the ink-jet printing coating need to have higher standards and requirements. The colorant in the ink-jet printing ink is generally water-soluble dyes, and any dye has a hydrophilic carboxylic acid group or sulfonic acid group, so that the water resistance is poor, and the affinity between the ink-absorbing coating and the dye is reduced under an aqueous environment.
Most of adhesives of the existing photographic paper are acrylic coatings, and an acrylic emulsion is used as the adhesive to be applied to an ink-jet printing coating, so that the content of hydroxyl functional groups with strong hydrophilicity in the molecular structure of a coating liquid is reduced, the water resistance of the coating is poor, and the adhesion between the coating liquid and a base material is poor; the batching process is complex, about 50 percent of organic solvent is contained, and the organic solvent can be dispersed into the air in the batching and coating production processes, so that the workshop environment is polluted, the human health is harmed, and the requirement of environmental protection is difficult to meet.
The existing ink-jet photographic paper with the acrylic coating has the defects that most products are not waterproof and are easy to change color due to humidity in the air, the surface glossiness of some photographic papers cannot achieve an ideal effect, the printed images lack three-dimensional sense and influence the aesthetic effect, namely, the ink receptivity of the existing photographic paper with the acrylic coating is poor, and the color fastness is not enough.
Disclosure of Invention
The invention provides an aqueous coating liquid which is used for photographic paper and can improve the known ink absorbability and color fastness.
In view of the above, the present application provides an aqueous coating liquid for photographic paper, comprising, based on 100 parts by weight:
preferably, the ethylene-acrylic acid copolymer is prepared from 45 to 85wt% of ethylene and 25 to 55wt% of acrylic acid; the grain diameter of the gas-phase silicon dioxide is 20-60 nm, the purity is 99.5-100%, and the specific surface area is 200-600 m 2 /g。
Preferably, the modifier is selected from one or more of polydimethylsiloxane and polyethyleneimine; the molar concentration of the potassium hydroxide solution is 2-5 mol/L; the cationic polymer is poly dimethyl diallyl ammonium chloride; the antistatic agent is selected from glycerol stearate.
Preferably, the modifier is a mixture of polydimethylsiloxane and polyethyleneimine in a mass ratio of 1.
Preferably, the fumed silica is present in an amount of 12 to 18 parts by weight.
Preferably, the content of the cationic polymer is 3 to 4 parts by weight.
Preferably, the content of the potassium hydroxide solution is 0.07 to 0.68 parts by weight.
The application also provides a preparation method of the aqueous coating liquid for photographic paper, which comprises the following steps:
a) Mixing 8-12 parts by weight of soft water and 0.3-0.8 part by weight of modifier, and then adding fumed silica to obtain emulsion;
b) Mixing 25-40 parts by weight of ethylene-acrylic acid copolymer, 22-58 parts by weight of soft water and the emulsion, and then adding 0.05-1.0 part by weight of potassium hydroxide solution, 2-5 parts by weight of cationic polymer and 0.05-0.2 part by weight of antistatic agent to obtain the coating liquid for photographic paper.
Preferably, in the step A), the stirring speed of the mixing is 1000-2000 r/min; in the step B), the stirring speed of the mixing is 50-150 r/min.
The application also provides printing paper which consists of the printing paper and aqueous coating liquid coated on the surface of the printing paper, wherein the aqueous coating liquid is the aqueous coating liquid for the printing paper or the aqueous coating liquid for the printing paper prepared by the preparation method.
An aqueous coating liquid is provided, which includes an ethylene-acrylic acid copolymer, fumed silica, a modifier, a potassium hydroxide solution, a cationic polymer, an antistatic agent, and soft water; the modifier can enable anionic dye molecules to be adsorbed to the surface of silica pigment particles and fixed on the surface layer to be separated from a solvent, so that the water resistance of an image can be improved, the transverse movement of the dye can be prevented, and the color fastness of the printed image can be improved; meanwhile, the introduction of the potassium hydroxide solution and the cationic polymer can improve the ink absorption performance and the water resistance performance of the aqueous coating liquid. Therefore, the water-based coating liquid capable of improving the ink absorption and the color fastness of the photographic paper is provided, and the full and true reduction of the color of the image of the photographic paper after color ink-jet printing is effectively ensured; the ink absorption and fixation performance is excellent, the phenomena of ink piling and ink scattering can not occur, the color fastness of the photo after ink-jet printing is high, and the ink-jet image can not be damaged by immediate arbitrary touch.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
In view of the problems of poor ink absorption and insufficient color fastness of the photographic paper of the acrylic type coating in the prior art, the application provides the aqueous coating liquid for the photographic paper, which is used as the coating of the photographic paper and improves the ink absorption and the color fastness of the photographic paper. Specifically, the aqueous coating liquid for photographic paper comprises the following components in 100 parts by weight:
in the present application, the ethylene-acrylic acid copolymer is prepared from 45 to 85wt% of ethylene and 25 to 55wt% of acrylic acid; the resin is obtained by copolymerizing an ethylene monomer and an acrylic acid monomer in a high-pressure reaction kettle by utilizing free radical polymerization reaction. The ethylene-acrylic acid copolymer mainly plays a role in bonding, tightly connects the ink with the photographic paper substrate, and prevents the ink and the photographic paper substrate from being stripped, falling powder and generating cracks. The content of the ethylene-acrylic acid copolymer is 25 to 40 parts by weight, specifically, 28 to 38 parts by weight, more specifically, 30 to 35 parts by weight. If the content of the ethylene-acrylic acid copolymer is too large, the content of other components is inevitably reduced, and the adhesion and the water resistance are adversely affected; too small a content makes the basic printing adhesion of the coating liquid fail to reach the standard.
The grain diameter of the gas-phase silicon dioxide is 20-60 nm, the purity is 99.5-100%, and the specific surface area is 200-600 m 2 (ii) in terms of/g. The fumed silica is contained in an amount of 10 to 20 parts by weight, more specifically, 12 to 18 parts by weight.
The modifier can be selected from one or two of polydimethylsiloxane and polyethyleneimine; preferably, the modifier is a mixture of polydimethylsiloxane and polyethyleneimine according to a mass ratio of 1. Polydimethylsiloxane in the modifier can effectively improve the surface activity of the fumed silica and enhance the dispersion uniformity of the fumed silica in the aqueous coating liquid, and simultaneously, a siloxane chain in the modifier can be bonded with a silanol group on the surface of the fumed silica to form a layer of coating, so that the viscosity of the aqueous coating liquid is enhanced; the polyethyleneimine in the modifier belongs to a high-molecular cationic modifier, and molecules of the polyethyleneimine contain a plurality of nonpolar chains, so the introduction of the polyethyleneimine can influence the surface state of particles of a coating, reduce the surface energy state of fumed silica particles and weaken the surface polarity of the particles. Therefore, the modifier of the present application can adsorb anionic dye molecules on the surface of silica pigment particles, fix the dye molecules on the surface layer, separate the dye molecules from a solvent, improve the water resistance of an image, and prevent lateral movement of a colorant, i.e., a dye, thereby improving the color fastness of a printed image. The content of the modifier is 0.3 to 0.8 parts by weight, more specifically, 0.4 to 0.7 parts by weight, and more specifically, 0.5 to 0.6 parts by weight.
The contents of the fumed silica and the modifier are in a proportional relationship, the optimal content ratio of the fumed silica and the modifier is also in the control range, the content of the silica is low, the ink absorption is insufficient, the color difference value is large, if the content is too high, part of the silica cannot be fully reacted by the modifier, residues are generated, powder falls off, and the appearance is affected.
The potassium hydroxide solution is a potassium hydroxide solution with the molar concentration of 2-5 mol/L, more specifically 3mol/L. Most of the ink-jet ink is anionic, and the fixation of the fumed silica to the dye in the ink can be enhanced by adding the fixed metal cations, so that the ink absorption performance of the ink-jet ink is improved. The content of the potassium hydroxide solution is 0.05 to 1.0 part by weight, and more specifically, the content of the potassium hydroxide solution is 0.07 to 0.68 part by weight.
The cationic polymer is a poly dimethyl diallyl ammonium chloride color fixing agent. The cationic polymer can perform a crosslinking reaction with the dye to quickly fix the dye in the ink, so that the printing color density is further improved; on the other hand, the wet processing fastness of the printed color can be improved, the color can not fall off after meeting water, and the water resistance of the color printed by the photographic paper is improved. The content of the cationic polymer is 2 to 5 parts by weight, more specifically, 3 to 4 parts by weight.
The antistatic agent is glycerol-stearate. The content of the antistatic agent is 0.05 to 0.2 parts by weight, more specifically, 0.08 to 0.15 parts by weight.
The application also provides a preparation method of the aqueous coating liquid for photographic paper, which comprises the following steps:
a) Mixing 8-12 parts by weight of soft water and 0.3-0.8 part by weight of modifier, and then adding fumed silica to obtain emulsion;
b) Mixing 25-40 parts by weight of ethylene-acrylic acid copolymer, 22-58 parts by weight of soft water and the emulsion, and then adding 0.05-1.0 part by weight of potassium hydroxide solution, 2-5 parts by weight of cationic polymer and 0.05-0.2 part by weight of antistatic agent to obtain the coating liquid for photographic paper.
In the preparation method, in the step A), the mixing stirring speed is 1000-2000 r/min; in the step B), the stirring speed of the mixing is 50-150 r/min.
The application also provides printing photographic paper which consists of the photographic paper and aqueous coating liquid coated on the surface of the photographic paper; the aqueous coating liquid is specifically the aqueous coating liquid for photographic paper in the scheme.
The invention provides an aqueous coating liquid for photographic paper, which can improve the ink absorption and color fastness of the photographic paper and effectively ensure that the image color of the photographic paper after color ink-jet printing is full and true; the ink absorption and fixation performance is excellent, the phenomena of ink piling and ink scattering can not occur, the color fastness of the photo after ink-jet printing is high, and the ink-jet image can not be damaged by immediate arbitrary touch.
For further understanding of the present invention, the following examples are given to illustrate the aqueous coating liquid for photographic paper, the preparation method thereof and the application thereof, and the scope of the present invention is not limited by the following examples.
Example 1
a) Mixing 10 parts of soft water and 0.3 part of modifier, putting the mixture into a high-speed stirrer for stirring at the speed of 1500 rpm to fully and uniformly mix the mixture, adding 10 parts of fumed silica, continuously stirring for 60min, standing and sealing for later use;
b) Mixing 25 parts of ethylene-acrylic acid copolymer and 52.6 parts of soft water, starting normal-temperature stirring, adding the prepared emulsion in the step a) while stirring at 100r/min, then continuously adding 0.05 part of potassium hydroxide solution, 2 parts of cationic polymer and 0.05 part of antistatic agent, and continuously stirring for 5min to obtain the water-based coating liquid, wherein the water-based coating liquid is coated on photographic paper by using an anilox roller, and a finished product obtained after high-speed ink-jet printing is subjected to color fastness and water resistance tests, wherein the test standard of the color fastness is GB/T9286-1998, and the test result is adhesion level 1; the water resistance test method comprises the following steps: and (3) soaking the finished product in room-temperature water for 24 hours, and testing the color difference value to be 0.56 delta E by using a color difference meter.
Comparative example 1
The preparation process provided in example 1 was used with the difference that: no polyethyleneimine; the adhesion force is tested to be 2 grade, and the color density is 0.6 delta E.
Comparative example 2
The preparation process provided in example 1 was used with the difference that: (ii) no polydimethyl siloxane addition polymerization; the adhesion was tested to be grade 2 and the color density was 0.6. Delta. E.
Example 2
a) Mixing 10 parts of soft water and 0.5 part of modifier, putting the mixture into a high-speed stirrer for stirring at the speed of 1500 rpm to fully and uniformly mix the mixture, adding 15 parts of fumed silica, continuously stirring for 60min, standing and sealing for later use;
b) Mixing 35 parts of ethylene-acrylic acid copolymer and 36.33 parts of soft water, starting normal-temperature stirring, adding the emulsion prepared in the step a) while stirring at 100r/min, then continuously adding 0.07 part of potassium hydroxide solution, 3 parts of cationic polymer and 0.1 part of antistatic agent, and continuously stirring for 5min to obtain the water-based coating liquid, wherein the water-based coating liquid is coated on photographic paper by using an anilox roller, and a finished product obtained after high-speed ink-jet printing is subjected to color fastness and water resistance tests, the test standard of the color fastness is GB/T9286-1998, and the test result is adhesion level 0; the water resistance test method comprises the following steps: and (3) soaking the finished product in water at room temperature for 24 hours, and testing the color difference value to be 0.38 delta E by using a color difference meter.
Example 3
a) Mixing 10 parts of soft water and 0.8 part of modifier, putting the mixture into a high-speed stirrer for stirring at the speed of 1500 rpm to fully and uniformly mix the mixture, adding 20 parts of fumed silica, continuously stirring for 60min, standing and sealing for later use;
b) Mixing 40 parts of ethylene-acrylic acid copolymer and 23 parts of soft water, starting normal-temperature stirring, adding the prepared emulsion in the step a) while stirring at 100r/min, then continuously adding 1 part of potassium hydroxide solution, 5 parts of cationic polymer and 0.2 part of antistatic agent, and continuously stirring for 5min to obtain the water-based coating liquid, wherein the water-based coating liquid is coated on photographic paper by using an anilox roller, and a finished product obtained after high-speed ink-jet printing is subjected to color fastness and water resistance tests, wherein the test standard of the color fastness is GB/T9286-1998, and the test result is adhesion level 1; the water resistance test method comprises the following steps: and (3) soaking the finished product in room-temperature water for 24 hours, and testing the color difference value to be 0.45 delta E by using a color difference meter.
Comparative example 3
The preparation process provided in example 3 was used with the difference that: the dosage of the fumed silica is changed to 20.8 parts without adding a modifier; the adhesion force is tested to be 1 grade, and the color difference value is 1.2 delta E.
Comparative example 4
The preparation process provided in example 3 was used, with the difference that: no fumed silica; the adhesion was tested to be grade 1 and the color difference was 1.55. Delta. E.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An aqueous coating liquid for photographic paper, comprising, based on 100 parts by weight:
the modifier is a mixture of polydimethylsiloxane and polyethyleneimine in a mass ratio of 1.
2. The aqueous coating liquid for photographic paper as claimed in claim 1, wherein the ethylene-acrylic acid copolymer is prepared from 45 to 85% by weight of ethylene and 25 to 55% by weight of acrylic acid; the particle size of the fumed silica is 20-60 nm, the purity is 99.5-100%, and the specific surface area is 200-600 m 2 /g。
3. The aqueous coating liquid for photographic paper according to claim 1, wherein the molar concentration of the potassium hydroxide solution is 2 to 5mol/L; the cationic polymer is poly dimethyl diallyl ammonium chloride; the antistatic agent is selected from glycerol stearate.
4. The aqueous coating liquid for photographic paper as claimed in claim 1, wherein the content of the modifier is 0.4 to 0.7 parts by weight.
5. The aqueous coating liquid for photographic paper as claimed in claim 1, wherein the content of the fumed silica is 12 to 18 parts by weight.
6. The aqueous coating liquid for photographic paper as claimed in claim 1, wherein the cationic polymer is contained in an amount of 3 to 4 parts by weight.
7. The aqueous coating liquid for photographic paper as claimed in claim 1, wherein the potassium hydroxide solution is contained in an amount of 0.07 to 0.68 parts by weight.
8. The process for producing an aqueous coating liquid for photographic paper according to claim 1, comprising the steps of:
a) Mixing 8-12 parts by weight of soft water and 0.3-0.8 part by weight of modifier, and then adding fumed silica to obtain emulsion;
b) Mixing 25-40 parts by weight of ethylene-acrylic acid copolymer, 22-58 parts by weight of soft water and the emulsion, and then adding 0.05-1.0 part by weight of potassium hydroxide solution, 2-5 parts by weight of cationic polymer and 0.05-0.2 part by weight of antistatic agent to obtain the coating liquid for photographic paper.
9. The method according to claim 8, wherein in the step a), the mixing is performed at a stirring speed of 1000 to 2000 rpm; in the step B), the stirring speed of the mixing is 50-150 r/min.
10. A printing paper comprising a printing paper and an aqueous coating liquid applied to the surface of the printing paper, wherein the aqueous coating liquid is the aqueous coating liquid for printing paper according to any one of claims 1 to 7 or the aqueous coating liquid for printing paper prepared by the preparation method according to any one of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110938011.4A CN113605138B (en) | 2021-08-16 | 2021-08-16 | Aqueous coating liquid for photographic paper, preparation method thereof and printing photographic paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110938011.4A CN113605138B (en) | 2021-08-16 | 2021-08-16 | Aqueous coating liquid for photographic paper, preparation method thereof and printing photographic paper |
Publications (2)
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| CN101772422A (en) * | 2007-07-31 | 2010-07-07 | 惠普发展公司，有限责任合伙企业 | Media for inkjet web press printing |
| CN108587367A (en) * | 2018-04-19 | 2018-09-28 | 杨帮燕 | A kind of preparation method of film printing coating |
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| CN101772422A (en) * | 2007-07-31 | 2010-07-07 | 惠普发展公司，有限责任合伙企业 | Media for inkjet web press printing |
| CN108587367A (en) * | 2018-04-19 | 2018-09-28 | 杨帮燕 | A kind of preparation method of film printing coating |
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