CN116875111A - High-temperature-resistant waterborne polyurethane ink and preparation method thereof - Google Patents
High-temperature-resistant waterborne polyurethane ink and preparation method thereof Download PDFInfo
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- CN116875111A CN116875111A CN202310991141.3A CN202310991141A CN116875111A CN 116875111 A CN116875111 A CN 116875111A CN 202310991141 A CN202310991141 A CN 202310991141A CN 116875111 A CN116875111 A CN 116875111A
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- aqueous polyurethane
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 41
- 239000004814 polyurethane Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000010445 mica Substances 0.000 claims abstract description 78
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 78
- 239000000843 powder Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 20
- 239000004575 stone Substances 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 33
- 229920002554 vinyl polymer Polymers 0.000 claims description 32
- 230000002209 hydrophobic effect Effects 0.000 claims description 23
- 239000002904 solvent Substances 0.000 claims description 19
- 230000004048 modification Effects 0.000 claims description 18
- 238000012986 modification Methods 0.000 claims description 18
- 239000000413 hydrolysate Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 7
- 239000002216 antistatic agent Substances 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 25
- -1 methyl alcohol amine Chemical class 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011230 binding agent Substances 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 239000012295 chemical reaction liquid Substances 0.000 description 10
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 10
- RBNPOMFGQQGHHO-UHFFFAOYSA-N glyceric acid Chemical compound OCC(O)C(O)=O RBNPOMFGQQGHHO-UHFFFAOYSA-N 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 8
- 229920002401 polyacrylamide Polymers 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 230000037303 wrinkles Effects 0.000 description 7
- 108010009736 Protein Hydrolysates Proteins 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 239000013530 defoamer Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000012855 volatile organic compound Substances 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 231100000252 nontoxic Toxicity 0.000 description 3
- 230000003000 nontoxic effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Natural products OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses high-temperature-resistant waterborne polyurethane ink and a preparation method thereof, and belongs to the technical field of ink. The water-based polyurethane ink comprises the following components in parts by weight: 60-70 parts of aqueous polyurethane resin, 20-35 parts of filler, 10-15 parts of mica powder and 50-70 parts of water. The preparation method comprises the step of uniformly mixing the aqueous polyurethane resin, the filler, the mica stone, the water and other component assistants under the stirring condition. The water-based polyurethane ink disclosed by the invention can resist high-temperature stewing, can keep excellent adhesion fastness under a high-temperature condition, and can be prevented from falling off from a printing stock under the high-temperature condition.
Description
Technical Field
The invention relates to the technical field of ink, in particular to high-temperature-resistant aqueous polyurethane ink and a preparation method thereof.
Background
The solvent type ink is composed of four major components, namely colored dye, binder resin (high polymer resin or natural resin), organic solvent and related auxiliary agents, wherein the binder resin is often dispersed in the organic solvent, so that the binder component generally contains the organic solvent which accounts for about half of the total weight of the binder, if the binder component contacts for a long time, the binder component causes a certain degree of corrosion to the skin of operators and users, and the organic volatile matter (VOCs) component contained in the binder component can be mixed in the air in the production process and passively sucked into the human body, so that the health of the human body is greatly threatened. The organic solvent component in the solvent-based ink accounts for about half of the components and is extremely easy to volatilize, the solvent is volatilized in the air during the production and use process, and part of the solvent which is diffused into the air is mixed into oxygen and even chemically reacts with the oxygen to generate new harmful substances, so that the living and movable air environment of human beings is greatly destroyed, the ecological balance is disturbed under more serious conditions, and the water-based ink is generated under the severe conditions. The water-based ink is simply called water ink, and consists of pigment, relevant auxiliary agent, water-dispersible or water-soluble high polymer resin binder and solvent. Therefore, the water is adopted as the solvent, namely the characteristic of the water-based ink is the biggest characteristic, which is different from the most obvious characteristic of solvent-based ink, the organic solvent component contained in the water-based ink is extremely low, or the water-based ink is completely free of organic solvent, so that the water-based ink has the advantages of extremely low VOCs content, low toxicity or toxicity, no combustion, no corrosion and the like, and the water resource is extremely abundant on earth, so that the water-based ink is popular under the current environment-friendly theme, and is used as a core environment-friendly printing material, and the water-based ink is rapidly developed in the printing industry and related industries. The aqueous polyurethane is adopted as the binder of the aqueous polyurethane ink, but the aqueous polyurethane has poor mechanical properties at high temperature, so that the ink falls off from a printing stock, and handwriting or patterns are blurred.
Chinese patent publication No. CN106833116 discloses a water-based polyurethane printing ink and a preparation process thereof, wherein the ink comprises water-based polyurethane emulsion, deionized water, organic pigment or inorganic pigment, water-based wax emulsion, methyl alcohol amine neutralizer, thickener, defoamer, wetting agent and dispersing aid, and is prepared by dispersing and grinding. As another example, chinese patent publication No. CN104497698 discloses a preparation method of high-performance aqueous polyurethane ink, which comprises the following steps: a) selecting materials and preparing materials, b) preparing polyurethane emulsion, c) preparing color paste, and d) preparing ink. The invention discloses a preparation method of high-performance water-based polyurethane ink, and the prepared water-based polyurethane ink is safe and nontoxic, and has excellent adhesive force, good stability, high drying rate and high film forming performance on flexible packaging films. Although the ink in the above patent documents has good adhesion at normal temperature, it is not resistant to high temperature, and the ink easily drops off from the substrate under high temperature conditions.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides high-temperature-resistant waterborne polyurethane ink and a preparation method thereof. The water-based polyurethane ink disclosed by the invention can resist high-temperature stewing, can keep excellent adhesion fastness under a high-temperature condition, and can be prevented from falling off from a printing stock under the high-temperature condition.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the high-temperature-resistant aqueous polyurethane ink comprises the following components in parts by weight:
60-70 parts of aqueous polyurethane resin
20-35 parts of filler
10-15 parts of mica powder
50-70 parts of water.
The aqueous polyurethane resin is used as a binder of the ink, and water is used as an ink solvent, so that the aqueous ink is different from solvent type ink, has no organic solvent, has extremely low VOCs content, is nontoxic and is environment-friendly. The high temperature resistance of the ink is improved by adding mica powder into the water-based ink, so that the ink can still keep excellent adhesion performance and adhesive force under the condition of high-temperature cooking, and the problem of unclear writing or pattern pasting caused by the falling of the ink from a printing stock is avoided.
Preferably, the surface of the mica powder is subjected to hydrophobic modification treatment.
In the team experiment process, the invention discovers that after mica powder is doped into the water-based polyurethane ink, the curing time of the water-based polyurethane ink is prolonged, and the printing efficiency of the ink is reduced. Further research shows that the curing time extension is related to the lamellar structure of the mica stone and the hydrophilicity of surface-supported hydroxyl groups, and water molecules are absorbed by the lamellar structure of the mica stone, so that the solvent of the oil ink is not easy to quickly evaporate, and the curing time of the ink is prolonged. Aiming at the problem, the invention carries out a certain degree of hydrophobic modification treatment on the surface of the mica powder, avoids the absorption of the laminated structure of the mica powder to moisture, and experiments show that after the surface of the mica powder is subjected to hydrophobic modification, the curing time of the printing ink is shortened, thereby improving the printing efficiency of the printing ink.
Preferably, the surface hydrophobic modification treatment method of the mica powder is surface grafting of hydrophobic functional groups.
Preferably, the hydrophobic functional group is one or more of vinyl, alkyl and aryl.
Preferably, the mica powder surface hydrophobic modification treatment method comprises the following steps:
(1) Dissolving vinyl trimethoxy silane in a solvent, and regulating pH to be acidic to obtain hydrolysate;
(2) The mica stone is contacted with the hydrolysate to completely react;
(3) Drying to obtain hydrophobically modified mica powder.
According to the invention, vinyl trimethoxy silane is used as a hydrophobic modifier of the mica, and the hydroxyl groups on the surface of the mica undergo condensation reaction through hydrolysis of the silane coupling agent, so that vinyl is grafted on the surface of the mica, and the surface of the mica has certain hydrophobic performance.
Preferably, the mass ratio of the mica stone to the vinyltrimethoxysilane is 1 (0.06-0.09).
According to the invention, the mass ratio of the mica powder to the vinyl trimethoxy silane is preferably controlled to be less than 1:0.06, and when the mass ratio is less than 1:0.06, a sufficient amount of vinyl functional groups are grafted on the surface of the mica powder, the surface of the mica powder presents obvious hydrophobicity, and the curing time of the printing ink can be greatly shortened. In the experimental process, when the vinyl grafting amount of the surface of the mica stone is continuously improved, the high-temperature resistance of the ink is reduced when the mass ratio of the mica to the vinyl is smaller than 1:0.09, and the research shows that the high-temperature resistance is related to the excessive vinyl grafting of mica Dan Biaomian, the mica Dan Biaomian is extremely high in hydrophobicity on the surface of the mica stone due to the excessive vinyl grafting, the interface of the mica Dan Biaomian is extremely low in compatibility with water, the mica is suspended on the surface of the ink, and the agglomeration phenomenon occurs, so that the high-temperature resistance of the ink is influenced, and therefore, the invention preferably controls the mass ratio of the mica stone to the vinyl trimethoxysilane to be larger than 1:0.09.
Preferably, the ink component further comprises a dispersant.
Preferably, an antifoaming agent is also included in the ink component.
Preferably, an antistatic agent is also included in the ink component.
A preparation method of high-temperature-resistant waterborne polyurethane ink comprises the following steps:
and uniformly mixing the aqueous polyurethane resin, the filler, the mica stone, the water and other component assistants under the stirring condition to obtain the polyurethane resin.
The invention has the following beneficial effects:
(1) The aqueous polyurethane resin is used as a binder of the ink, water is used as an ink solvent, and the aqueous ink is different from solvent type ink, has no organic solvent, has extremely low VOCs content, is nontoxic and is environment-friendly;
(2) The high temperature resistance of the ink is improved by adding mica powder into the water-based ink, so that the ink can still keep excellent adhesion performance and adhesive force under the condition of high-temperature cooking, and the problem of unclear writing or pattern pasting caused by the falling of the ink from a printing stock is avoided;
(3) The surface of mica powder is modified by hydrophobic property, so that the curing time of the ink is shortened.
Detailed Description
The materials and equipment used in the specific examples of the present invention are commercially available or are commonly used in the art, and the methods in the examples are conventional in the art unless otherwise specified.
Examples
The high-temperature-resistant aqueous polyurethane ink comprises the following components in parts by weight:
65 parts of aqueous polyurethane resin
30 parts of filler nano titanium dioxide
Mica powder 12 parts
60 parts of water.
Wherein, the surface of mica powder is subjected to hydrophobic modification treatment, which comprises the following steps:
step 1: adding vinyl trimethoxy siloxane into an ethanol solvent with the mass concentration of 70% according to the volume ratio of 1:30, stirring for 3 hours, and then adding hydrochloric acid to adjust the pH value of the solution to 3.5 to obtain vinyl trimethoxy siloxane hydrolysate;
step 2: adding mica powder into the vinyl trimethoxy siloxane hydrolysate, wherein the mass ratio of the mica powder to the vinyl trimethoxy siloxane is 1:0.08, and stirring for 10 hours until the mica powder and the vinyl trimethoxy siloxane react fully;
step 3: filtering and separating the reaction liquid, and then sending the reaction liquid into an oven to be dried for 10 hours at 60 ℃ to obtain the catalyst. :
the preparation method of the high-temperature-resistant aqueous polyurethane ink comprises the following steps:
step 1: adding the aqueous polyurethane resin and the nano titanium dioxide into water, and stirring for 30min at 1000 r/min;
step 2: adding mica powder, stirring at 600r/min for 20 min.
Comparative example 1
The comparative example differs from example 1 in that no mica powder was added to the ink composition.
Examples
The high-temperature-resistant aqueous polyurethane ink comprises the following components in parts by weight:
68 parts of aqueous polyurethane resin
33 parts of filler nano titanium dioxide
Mica powder 13 parts
Polyacrylamide dispersant 3 parts
Polyoxypropylene glycerol ether defoamer 1 part
Sodium alkyl sulfonate antistatic agent 2 parts
65 parts of water.
Wherein, the surface of mica powder is subjected to hydrophobic modification treatment, which comprises the following steps:
step 1: adding vinyl trimethoxy siloxane into an ethanol solvent with the mass concentration of 70% according to the volume ratio of 1:30, stirring for 3 hours, and then adding hydrochloric acid to adjust the pH value of the solution to 3.5 to obtain vinyl trimethoxy siloxane hydrolysate;
step 2: adding mica powder into the vinyl trimethoxy siloxane hydrolysate, wherein the mass ratio of the mica powder to the vinyl trimethoxy siloxane is 1:0.08, and stirring for 10 hours until the mica powder and the vinyl trimethoxy siloxane react fully;
step 3: filtering and separating the reaction liquid, and then sending the reaction liquid into an oven to be dried for 10 hours at 60 ℃ to obtain the catalyst.
The preparation method of the high-temperature-resistant aqueous polyurethane ink comprises the following steps:
step 1: adding the aqueous polyurethane resin and the nano titanium dioxide into water, and stirring for 30min at 1000 r/min;
step 2: adding mica powder, polyacrylamide, polyoxypropylene glycerol ether and sodium alkyl sulfonate, and stirring at 600r/min for 25 min.
Comparative example 2
Comparative example 2 differs from example 2 in that the mica stone surface has not been subjected to hydrophobic modification treatment.
Examples
The high-temperature-resistant aqueous polyurethane ink comprises the following components in parts by weight:
63 parts of aqueous polyurethane resin
25 parts of filler nano titanium dioxide
Mica powder 12 parts
Polyacrylamide dispersant 3 parts
Polyoxypropylene glycerol ether defoamer 1 part
Sodium alkyl sulfonate antistatic agent 2 parts
55 parts of water.
Wherein, the surface of mica powder is subjected to hydrophobic modification treatment, which comprises the following steps:
step 1: adding vinyl trimethoxy siloxane into an ethanol solvent with the mass concentration of 70% according to the volume ratio of 1:30, stirring for 3 hours, and then adding hydrochloric acid to adjust the pH value of the solution to 3.5 to obtain vinyl trimethoxy siloxane hydrolysate;
step 2: adding mica powder into vinyl trimethoxy siloxane hydrolysate, wherein the mass ratio of the mica powder to the vinyl trimethoxy siloxane is 1:0.07, and stirring for 10 hours until the mica powder and the vinyl trimethoxy siloxane fully react;
step 3: filtering and separating the reaction liquid, and then sending the reaction liquid into an oven to be dried for 10 hours at 60 ℃ to obtain the catalyst.
The preparation method of the high-temperature-resistant aqueous polyurethane ink comprises the following steps:
step 1: adding the aqueous polyurethane resin and the nano titanium dioxide into water, and stirring for 30min at 1000 r/min;
step 2: adding mica powder, polyacrylamide, polyoxypropylene glycerol ether and sodium alkyl sulfonate, and stirring at 600r/min for 25 min.
Examples
The high-temperature-resistant aqueous polyurethane ink comprises the following components in parts by weight:
70 parts of aqueous polyurethane resin
35 parts of filler nano titanium dioxide
15 parts of mica powder
Polyacrylamide dispersant 3 parts
Polyoxypropylene glycerol ether defoamer 1 part
Sodium alkyl sulfonate antistatic agent 2 parts
70 parts of water.
Wherein, the surface of mica powder is subjected to hydrophobic modification treatment, which comprises the following steps:
step 1: adding vinyl trimethoxy siloxane into an ethanol solvent with the mass concentration of 70% according to the volume ratio of 1:30, stirring for 3 hours, and then adding hydrochloric acid to adjust the pH value of the solution to 3.5 to obtain vinyl trimethoxy siloxane hydrolysate;
step 2: adding mica powder into vinyl trimethoxy siloxane hydrolysate, wherein the mass ratio of the mica powder to the vinyl trimethoxy siloxane is 1:0.09, and stirring for 10 hours until the mica powder and the vinyl trimethoxy siloxane react fully;
step 3: filtering and separating the reaction liquid, and then sending the reaction liquid into an oven to be dried for 10 hours at 60 ℃ to obtain the catalyst.
The preparation method of the high-temperature-resistant aqueous polyurethane ink comprises the following steps:
step 1: adding the aqueous polyurethane resin and the nano titanium dioxide into water, and stirring for 30min at 1000 r/min;
step 2: adding mica powder, polyacrylamide, polyoxypropylene glycerol ether and sodium alkyl sulfonate, and stirring at 600r/min for 25 min.
Comparative example 3
Comparative example 3 differs from example 4 in that the mass ratio of mica powder to vinyltrimethoxysiloxane during the hydrophobic modification treatment of the surface of mica powder is 1:0.15.
Examples
The high temperature resistant water-based polyurethane ink comprises the following components in parts by weight
The components are as follows:
60 parts of aqueous polyurethane resin
20 parts of filler nano titanium dioxide
10 parts of mica powder
Polyacrylamide dispersant 3 parts
Polyoxypropylene glycerol ether defoamer 1 part
Sodium alkyl sulfonate antistatic agent 2 parts
50 parts of water.
Wherein, the surface of mica powder is subjected to hydrophobic modification treatment, which comprises the following steps:
step 1: adding vinyl trimethoxy siloxane into an ethanol solvent with the mass concentration of 70% according to the volume ratio of 1:30, stirring for 3 hours, and then adding hydrochloric acid to adjust the pH value of the solution to 3.5 to obtain vinyl trimethoxy siloxane hydrolysate;
step 2: adding mica powder into the vinyl trimethoxy siloxane hydrolysate, wherein the mass ratio of the mica powder to the vinyl trimethoxy siloxane is 1:0.06, and stirring for 10 hours until the mica powder and the vinyl trimethoxy siloxane react fully;
step 3: filtering and separating the reaction liquid, and then sending the reaction liquid into an oven to be dried for 10 hours at 60 ℃ to obtain the catalyst.
The preparation method of the high-temperature-resistant aqueous polyurethane ink comprises the following steps:
step 1: adding the aqueous polyurethane resin and the nano titanium dioxide into water, and stirring for 30min at 1000 r/min;
step 2: adding mica powder, polyacrylamide, polyoxypropylene glycerol ether and sodium alkyl sulfonate, and stirring at 600r/min for 25 min.
Comparative example 4
Comparative example 4 differs from example 5 in that the mass ratio of mica powder to vinyltrimethoxysiloxane during the hydrophobic modification treatment of the surface of mica powder is 1:0.03.
Performance test:
1.1 printing ink on a PET film, steaming in water at 100 ℃ for 60min, cooling, and observing whether the film surface is wrinkled, lost ink and handwriting is washed or not.
1.2 printing ink on PET film, steaming in water of 100deg.C for 60min, drying, and testing glossiness of ink according to GB/T13217.2-2009.
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| High temperature part of ink Post-reason changes | Does not wrinkle or fall off Clear ink and writing | Does not wrinkle or fall off Clear ink and writing | Does not wrinkle or fall off Clear ink and writing | Does not wrinkle or fall off Clear ink and writing | Does not wrinkle or fall off Clear ink and writing | Wrinkling, ink dropping, Handwriting blurring | Does not wrinkle or fall off Clear ink and writing | No wrinkling, no ink drop, Handwriting blurring | Does not wrinkle or fall off Clear ink and writing |
| Gloss level | 58 | 62 | 60 | 63 | 59 | 46 | 61 | 49 | 58 |
| Curing at 60 DEG C Time(s) | 6 | 5 | 7 | 4 | 9 | 4 | 25 | 5 | 12 |
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matter of the present invention will fall within the scope of the present invention, as long as the technical matter of the present invention is not changed from the above-mentioned embodiments.
Claims (10)
1. The high-temperature-resistant aqueous polyurethane ink is characterized by comprising the following components in parts by weight:
60-70 parts of aqueous polyurethane resin
20-35 parts of filler;
10-15 parts of mica powder
50-70 parts of water.
2. A high temperature resistant aqueous polyurethane ink as defined in claim 1, wherein,
the surface of the mica powder is subjected to hydrophobic modification treatment.
3. A high temperature resistant aqueous polyurethane ink as defined in claim 2, wherein,
the surface hydrophobic modification treatment method of the mica powder is to graft hydrophobic functional groups on the surface.
4. A high temperature resistant aqueous polyurethane ink as defined in claim 3, wherein,
the hydrophobic functional group is one or more of vinyl, alkyl and aryl.
5. A high temperature resistant aqueous polyurethane ink according to claim 2, 3 or 4,
the surface hydrophobic modification treatment method of the mica powder comprises the following steps:
(1) Dissolving vinyl trimethoxy silane in a solvent, and regulating pH to be acidic to obtain hydrolysate;
(2) The mica stone is contacted with the hydrolysate to completely react;
(3) Drying to obtain hydrophobically modified mica powder.
6. The high temperature resistant aqueous polyurethane ink of claim 5, wherein,
the mass ratio of the mica stone to the vinyl trimethoxy silane is 1 (0.060.09).
7. A high temperature resistant aqueous polyurethane ink as defined in claim 1, wherein,
the ink composition further includes a dispersant.
8. A high temperature resistant aqueous polyurethane ink as defined in claim 1, wherein,
the ink composition also includes an antifoaming agent.
9. A high temperature resistant aqueous polyurethane ink as defined in claim 1, wherein,
an antistatic agent is also included in the ink component.
10. A method for preparing the high temperature resistant aqueous polyurethane ink according to any one of claims 1 to 9, comprising the steps of:
and uniformly mixing the aqueous polyurethane resin, the filler, the mica stone, the water and other component assistants under the stirring condition to obtain the polyurethane resin.
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