CN109988459A - A kind of digital spray printing resin dispersion type mill base and its preparation method and application - Google Patents
A kind of digital spray printing resin dispersion type mill base and its preparation method and application Download PDFInfo
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- CN109988459A CN109988459A CN201910322280.0A CN201910322280A CN109988459A CN 109988459 A CN109988459 A CN 109988459A CN 201910322280 A CN201910322280 A CN 201910322280A CN 109988459 A CN109988459 A CN 109988459A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6659—Compounds of group C08G18/42 with compounds of group C08G18/34
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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- 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
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention discloses a kind of digital spray printing resin dispersion type mill bases, it is prepared by following component by weight: 10-20 parts of polyester polyol, 5-15 parts of dicyclohexyl methyl hydride diisocyanate, 2,2- 0.8-2 parts of dihydromethyl propionic acids, 0.01-0.03 parts of catalyst, 6-20 parts of acetone, 0.6-1.5 parts of triethylamine, 25-40 parts of deionized water, 0.6-2 parts of ethylenediamine, 30-40 parts of pigment pretreatment fluid.The pigment pretreatment fluid is prepared by following component by weight: 10-30 parts of pigment, 50-75 parts of deionized water, 5-20 parts of dispersing agent, 0.1-0.5 parts of preservative, 0.1-0.5 parts of defoaming agent.The invention also discloses the digital spray printing preparation method and application of resin dispersion type mill base.The ink prepared using resin dispersion type mill base of the invention, has certain promotion, while ink partial size is relatively uniform on color fastness, it is not easy to be agglomerated into bulky grain, printing fluency is more preferable, and is not easy blocking sprayer.
Description
Technical field
The present invention relates to a kind of mill base, in particular to a kind of digital spray printing resin dispersion type mill base and its preparation
Methods and applications.
Background technique
Ink-jet printing ink is a kind of effect by the electric field force between the spray head and stock of ink-jet printer, and
It sprays to form " liquid ink " that indicates graph text information trace in surface of the stock presumptive area.The chemical constituent of ink-jet ink with
The chemical constituent for printing ink is similar, generally by colorant, link stuff and other additives etc., the chemical constituent and print of ink-jet ink
The chemical constituent of brush ink is similar, generally by colorant, link stuff and other additives etc., generally according to the difference of link stuff, people
Ink is divided into water-based ink, oil base ink, solvent-based inks and heat curing type ink；Ink-jet printer ink is according to institute
The solvent type used can be divided into water-based ink, solvent-based inks and UV ink.Conventional type mill base preparation in the prior art
There are poor color fastness for ink, and the granular size of ink is different, there is bulky grain aggregate, while it is poor to print fluency, are easy stifled
Spray head.
Summary of the invention
In view of the deficiencies of the prior art, the first purpose of this invention is to provide a kind of digital spray printing resin dispersion type
Mill base, the ink prepared using the resin dispersion type mill base, has certain promotion, while ink partial size is more equal on color fastness
It is even, it is not easy to be agglomerated into bulky grain, printing fluency is more preferable, and is not easy blocking sprayer.
Second object of the present invention is to provide for a kind of preparation method of digital spray printing resin dispersion type mill base, tool
Have that preparation process is simple, easy to operate feature.
Third object of the present invention is to provide for a kind of application of digital spray printing resin dispersion type mill base, using this
Ink is prepared in resin dispersion type mill base.
Realize that the first purpose of this invention can reach by adopting the following technical scheme that:
A kind of digital spray printing resin dispersion type mill base, which is characterized in that by following component preparation by weight
At: 10-20 parts of polyester polyol, 5-15 parts of dicyclohexyl methyl hydride diisocyanate, 2,2- dihydromethyl propionic acids (DMPA) 0.8-2
Part, 0.01-0.03 parts of catalyst, 6-20 parts of acetone, 0.6-1.5 parts of triethylamine, 25-40 parts of deionized water, ethylenediamine 0.6-2
Part, 30-40 parts of pigment pretreatment fluid.
Preferably, the pigment pretreatment fluid is prepared by following component by weight: 10-30 parts of pigment,
50-75 parts of deionized water, 5-20 parts of dispersing agent, 0.1-0.5 parts of preservative, 0.1-0.5 parts of defoaming agent.
Preferably, the dispersing agent is selected from one of Tego750, Solsperse27000, Solsperse46000
Or it is two or more.
Preferably, the preservative is selected from one or more of PARMETOL DF35, PARMETOL BNX.
Preferably, the defoaming agent is selected from one or more of DF-220, UNIQFOAM295, BYK-024.
Preferably, the catalyst is selected from one or both of dibutyl tin dilaurate, stannous octoate, organo-bismuth
More than.
Preferably, the polyester polyol in CMA1024, UH-100, UH-200, MX-355 one or two kind with
On.
Realize that second object of the present invention can reach by adopting the following technical scheme that:
A kind of preparation method of digital spray printing resin dispersion type mill base, which comprises the following steps:
1) polyester polyol of formula ratio is dehydrated 1 hour at a temperature of 105-110 DEG C, is subsequently added into the two of formula ratio
Diphenylmethane diisocyanate reacts 2 hours at a temperature of 80-85 DEG C；Then 2, the 2- dihydroxy of formula ratio is sequentially added
Methylpropanoic acid (DMPA), catalyst and acetone, 60-70 DEG C at a temperature of the reaction was continued 3.5 hours, in reaction process measurement-
When the mass content of NCO reaches the theoretical value of design, synthetic reaction terminates, and obtains prepolymer；
2) prepolymer is cooled to 45-50 DEG C, the triethylamine that formula ratio is added carries out neutralization reaction, after 3-5min, is added
The deionized water of formula ratio is emulsified, and the ethylenediamine chain extension of formula ratio is added, and pigment pretreatment fluid is added, and is stirred 1 hour
Afterwards, 12 hours are stood；Finally 45-55 DEG C at a temperature of be evaporated under reduced pressure, after steaming acetone, both resin dispersion type color
Slurry.
Preferably, the preparation method of pigment pretreatment fluid is the following steps are included: by the deionized water of formula ratio, dispersion
Agent, preservative, defoaming agent, which sequentially add, to be dispersed with stirring in equipment, is then slowly added into pigment and is dispersed, after scattered, both
Pigment pretreatment fluid.
Realize that third object of the present invention can reach by adopting the following technical scheme that:
A kind of ink, which is characterized in that including the digital spray printing resin dispersion as described in the first purpose of this invention
Type mill base.
The beneficial effects of the present invention are:
Mill base of the invention optimizes raw material composition and dosage, it is using in polyurethane resin combination pigment pretreatment fluid points
The effect of powder, so that pigment dispersion is more preferable, more evenly；Meanwhile some pigment can be by polyurethane resin packet in mill base
It covers, the dispersing agent and water of surface of pigments are kept apart by polyurethane resin, avoid the hydrophily of dispersing agent to color fastness
Influence.The ink prepared using the resin dispersion type mill base, has certain promotion, while ink partial size is more equal on color fastness
It is even, it is not easy to be agglomerated into bulky grain, printing fluency is more preferable, and is not easy blocking sprayer.
Detailed description of the invention
Fig. 1-4 is the electron microscope for implementing sample 1 and contrast sample 1 under different amplification.
Specific embodiment mode
In the following, being described further in conjunction with specific embodiment to the present invention, unless otherwise specified, in following embodiment
Used raw material is commercially available.
A kind of digital spray printing resin dispersion type mill base, is prepared: polyester polyols by following component by weight
10-20 parts of alcohol, 5-15 parts of dicyclohexyl methyl hydride diisocyanate, 0.8-2 parts of 2,2- dihydromethyl propionic acids (DMPA), catalyst
0.01-0.03 parts, 6-20 parts of acetone, 0.6-1.5 parts of triethylamine, 25-40 parts of deionized water, 0.6-2 parts of ethylenediamine, pigment is located in advance
Liquid 30-40 parts of reason.
As preferred embodiment, the pigment pretreatment fluid is prepared by following component by weight: face
10-30 parts, 50-75 parts of deionized water, 5-20 parts of dispersing agent, 0.1-0.5 parts of preservative, 0.1-0.5 parts of defoaming agent of material.
As preferred embodiment, the dispersing agent be selected from Tego750, Solsperse27000,
One or more of Solsperse46000.
As preferred embodiment, the preservative be selected from one of PARMETOL DF35, PARMETOL BNX or
It is two or more.
As preferred embodiment, the defoaming agent be selected from one of DF-220, UNIQFOAM295, BYK-024 or
It is two or more.
As preferred embodiment, the catalyst is in dibutyl tin dilaurate, stannous octoate, organo-bismuth
It is one or more kinds of.
As preferred embodiment, the polyester polyol is in CMA1024, UH-100, UH-200, MX-355
It is a kind of.
A kind of preparation method of digital spray printing resin dispersion type mill base, comprising the following steps:
1) polyester polyol of formula ratio is dehydrated 1 hour at a temperature of 105-110 DEG C, is subsequently added into the two of formula ratio
Diphenylmethane diisocyanate reacts 2 hours at a temperature of 80-85 DEG C；Then 2, the 2- dihydroxy of formula ratio is sequentially added
Methylpropanoic acid (DMPA), catalyst and acetone, 60-70 DEG C at a temperature of the reaction was continued 3.5 hours, in reaction process measurement-
When the mass content of NCO reaches the theoretical value of design, synthetic reaction terminates, and obtains prepolymer；
2) prepolymer is cooled to 45-50 DEG C, the triethylamine that formula ratio is added carries out neutralization reaction, after 3-5min, is added
The deionized water of formula ratio is emulsified, and the ethylenediamine chain extension of formula ratio is added, and pigment pretreatment fluid is added, and is stirred 1 hour
Afterwards, 12 hours are stood；Finally 45-55 DEG C at a temperature of be evaporated under reduced pressure, after steaming acetone, both resin dispersion type color
Slurry.
As preferred embodiment, the preparation method of pigment pretreatment fluid the following steps are included: by formula ratio go from
Sub- water, dispersing agent, preservative, defoaming agent, which sequentially add, to be dispersed with stirring in equipment, is then slowly added into pigment and is dispersed, dispersion
After good, pigment pretreatment fluid is both obtained.
A kind of ink, including the resin dispersion type mill base of the digital spray printing as described in the first purpose of this invention.
The following are the preferred embodiment of the present invention:
Embodiment 1:
A kind of digital spray printing resin dispersion type mill base, is prepared: polyester polyols by following component by weight
15 parts of alcohol, 10 parts of dicyclohexyl methyl hydride diisocyanate, 1.2 parts of 2,2- dihydromethyl propionic acids (DMPA), 0.03 part of catalyst, third
10 parts of ketone, 1 part of triethylamine, 27 parts of deionized water, 1 part of ethylenediamine, 36 parts of pigment pretreatment fluid.
The pigment pretreatment fluid is prepared by following component by weight: 30 parts of pigment A, deionized water 55
Part, 15 parts of dispersing agent, 0.2 part of preservative, 0.2 part of defoaming agent.
The preparation method of pigment pretreatment fluid the following steps are included: by the deionized water of formula ratio, dispersing agent, preservative,
Defoaming agent, which sequentially adds, to be dispersed with stirring in equipment, is then slowly added into pigment and is dispersed, and after scattered, has both obtained pigment pretreatment
Liquid.
A kind of preparation method of digital spray printing resin dispersion type mill base, comprising the following steps:
1) polyester polyol of formula ratio is dehydrated 1 hour at a temperature of 105-110 DEG C, is subsequently added into the two of formula ratio
Diphenylmethane diisocyanate reacts 2 hours at a temperature of 80-85 DEG C；Then 2, the 2- dihydroxy of formula ratio is sequentially added
Methylpropanoic acid (DMPA), catalyst and acetone, 60-70 DEG C at a temperature of the reaction was continued 3.5 hours, in reaction process measurement-
When the mass content of NCO reaches the theoretical value of design, synthetic reaction terminates, and obtains prepolymer；
2) prepolymer being cooled to 45-50 DEG C, the triethylamine that formula ratio is added carries out neutralization reaction, after 3-5min, high speed
The deionized water that formula ratio is at the uniform velocity added under stirring is emulsified, and is added the ethylenediamine and pigment pretreatment fluid of formula ratio, is stirred
After mixing 1 hour, 12 hours are stood；Finally 45-55 DEG C at a temperature of be evaporated under reduced pressure, after steaming acetone, both resin point
Dissipate type mill base.
Embodiment 2:
A kind of digital spray printing resin dispersion type mill base, is prepared: polyester polyols by following component by weight
15 parts of alcohol, 10 parts of dicyclohexyl methyl hydride diisocyanate, 1.2 parts of 2,2- dihydromethyl propionic acids (DMPA), 0.03 part of catalyst, third
10 parts of ketone, 1 part of triethylamine, 27 parts of deionized water, 1 part of ethylenediamine, 36 parts of pigment pretreatment fluid.
The pigment pretreatment fluid is prepared by following component by weight: 30 parts of pigment B, deionized water 55
Part, 15 parts of dispersing agent, 0.2 part of preservative, 0.2 part of defoaming agent.
The preparation method of pigment pretreatment fluid the following steps are included: by the deionized water of formula ratio, dispersing agent, preservative,
Defoaming agent, which sequentially adds, to be dispersed with stirring in equipment, is then slowly added into pigment and is dispersed, and after scattered, has both obtained pigment pretreatment
Liquid.
Digital spray printing resin dispersion type mill base, the preparation method of pigment pretreatment fluid are same as Example 1.
Performance detection:
Respectively respectively conventionally and phase by the resin dispersion type mill base of embodiment 1-2 and conventional type mill base 1-3
It is configured to ink with formula rate, the ink that the resin dispersion type mill base of embodiment 1 is prepared is denoted as respectively implements sample 1-2, often
The ink that formalism mill base is prepared is denoted as contrast sample 1-3.
Experimental method 1: sample 1-2 will be implemented and contrast sample 1,3 is respectively charged into printer, advised according to identical printing
Lattice print color lump sample on cloth, place an evening after identical temperature drying.Sample color lump half was respectively cut in second day to be put into
In roller washing machine, 60 DEG C are washed 6.5 hours, are taken out drying observation color fastness grade, be the results are shown in Table 1.
Experimental method 2；It will implement sample 1 and contrast sample 1,2 dry film samples processed on silicon wafer respectively, in electron microscope
Lower amplification certain multiple observes surface condition, such as grain shape, granular size and distribution, the results are shown in Table 1 and Fig. 1-4.
Table 1
Referring to Fig.1-4 and table 1, the ink of resin dispersion type mill base preparation of the invention has certain promotion on color fastness,
Ink partial size is relatively uniform simultaneously, it is not easy to be agglomerated into bulky grain, relative to the ink of conventional type mill base preparation, print fluency
More preferably, and it is not easy blocking sprayer.
Implement sample 2 and to implement 1 Electronic Speculum situation of sample similar, contrast sample 2 and contrast sample Electronic Speculum situation also it is poor not
It is more, do not make state separately more.
Above embodiment is merely a preferred embodiment of the present invention mode, cannot limit the model protected of the present invention with this
It encloses, the variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to the present invention
Range claimed.
Claims (10)
1. a kind of digital spray printing resin dispersion type mill base, which is characterized in that be prepared by following component by weight:
10-20 parts of polyester polyol, 5-15 parts of dicyclohexyl methyl hydride diisocyanate, 2,2- 0.8-2 parts of dihydromethyl propionic acids, catalyst
0.01-0.03 parts, 6-20 parts of acetone, 0.6-1.5 parts of triethylamine, 25-40 parts of deionized water, 0.6-2 parts of ethylenediamine, pigment is located in advance
Liquid 30-40 parts of reason.
2. digital spray printing according to claim 1 resin dispersion type mill base, which is characterized in that the pigment pretreatment fluid
It is prepared by following component by weight: 10-30 parts of pigment, 50-75 parts of deionized water, 5-20 parts of dispersing agent, anti-corrosion
0.1-0.5 parts of agent, 0.1-0.5 parts of defoaming agent.
3. digital spray printing according to claim 2 resin dispersion type mill base, which is characterized in that the dispersing agent is selected from
One or more of Tego750, Solsperse27000, Solsperse46000.
4. digital spray printing according to claim 2 resin dispersion type mill base, which is characterized in that the preservative is selected from
One or more of PARMETOL DF35, PARMETOL BNX.
5. digital spray printing according to claim 2 resin dispersion type mill base, which is characterized in that the defoaming agent is selected from
One or more of DF-220, UNIQFOAM295, BYK-024.
6. digital spray printing according to claim 1 resin dispersion type mill base, which is characterized in that the catalyst is selected from two
One or more of dibutyl tin laurate, stannous octoate, organo-bismuth.
7. digital spray printing according to claim 1 resin dispersion type mill base, which is characterized in that the polyester polyol choosing
From one or more of CMA1024, UH-100, UH-200, MX-355.
8. a kind of preparation method of digital spray printing resin dispersion type mill base described in -7 any one according to claim 1, special
Sign is, comprising the following steps:
1) polyester polyol of formula ratio is dehydrated 1 hour at a temperature of 105-110 DEG C, is subsequently added into two hexamethylenes of formula ratio
Dicyclohexylmethane diisocyanate reacts 2 hours at a temperature of 80-85 DEG C；Then 2, the 2- dihydroxymethyl of formula ratio is sequentially added
Propionic acid, catalyst and acetone, 60-70 DEG C at a temperature of the reaction was continued 3.5 hours, the quality of measurement-NCO contains in reaction process
When amount reaches the theoretical value of design, synthetic reaction terminates, and obtains prepolymer；
2) prepolymer is cooled to 45-50 DEG C, the triethylamine that formula ratio is added carries out neutralization reaction, and after 3-5min, formula is added
The deionized water of amount is emulsified, and the ethylenediamine chain extension of formula ratio is added, quiet after the stirring of pigment pretreatment fluid being added 1 hour
It sets 12 hours；Finally 45-55 DEG C at a temperature of be evaporated under reduced pressure, after steaming acetone, both resin dispersion type mill base.
9. the preparation method of digital spray printing resin dispersion type mill base according to claim 8, which is characterized in that pigment is located in advance
The preparation method of reason liquid is stirred the following steps are included: the deionized water of formula ratio, dispersing agent, preservative, defoaming agent are sequentially added
It mixes in dispersing apparatus, is then slowly added into pigment and is dispersed, after scattered, both obtain pigment pretreatment fluid.
10. a kind of ink, which is characterized in that including the digital spray printing resin dispersion as described in claim 1-7 any one
Type mill base.
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Cited By (1)
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| CN115947923A (en) * | 2023-02-17 | 2023-04-11 | 广州山木新材料科技有限公司 | Waterborne polyurethane resin and digital pyrograph ink containing same |
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| CN115947923A (en) * | 2023-02-17 | 2023-04-11 | 广州山木新材料科技有限公司 | Waterborne polyurethane resin and digital pyrograph ink containing same |
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