CN103396508B - A kind of low-temperature self-crosslinking waterborne acrylic paint and preparation method thereof and application - Google Patents
A kind of low-temperature self-crosslinking waterborne acrylic paint and preparation method thereof and application Download PDFInfo
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Abstract
The invention discloses a kind of low-temperature self-crosslinking waterborne acrylic paint and preparation method thereof and application.With weight parts, low-temperature self-crosslinking waterborne acrylic paint of the present invention is prepared from by the first kind monomer of 30 ~ 50%, Equations of The Second Kind monomer, the 3rd class monomer of 1 ~ 2%, the 4th class monomer, the solvent of 40 ~ 60%, initiator, the water of 60 ~ 80%, the pH adjusting agent of 4 ~ 8% of 0.6 ~ 1.2% of 1 ~ 2% of 3 ~ 6%.In invention by obtained waterborne acrylic paint and aqueous color paste composite; final obtained a kind of water color ink printed on low polar plas film; the organic solvent content of this product is lower than 3%; be the water color ink of a kind of safety, environmental protection, film has low-temperature self-crosslinking (& lt on a plastic film; 60 DEG C), tinting strength is good, sticking power is high, glossiness is high, resistance to blocking is good characteristic.
Description
Technical field
The present invention relates to a kind of waterborne acrylic paint, be specifically related to a kind of low-temperature self-crosslinking waterborne acrylic paint and preparation method thereof and application.
Technical background
Acrylate resin because of its excellent sticking power, water tolerance, weathering resistance, tint retention etc., therefore is widely used in various coating, ink, sizing agent etc.Printing-ink is of many uses, and substantially all packings of product all be unable to do without it, especially food product pack.Printing-ink was mostly solvent type in the past, and containing a large amount of toxic and harmful substance, these harmful toxic matters are easy to chemical transport, pollute contents such as food.In recent years, along with ink technology development, people's environmental consciousness improves constantly, and exploitation environment-friendlyink ink is very urgent.At present, environment-friendlyink ink has aqueous ink, UV ink, water-based UV ink and alcohol dissolubility ink.Wherein, water color ink is the environment-friendly ink promoted mainly at present.Water color ink solvent used is water, and greatly reducing the quantity discharged of volatile organic matter, air conservation, is real environmental protection, non-toxic ink.
The solvent of water color ink is water, and water is polar material, is difficult to bond with the plastics film such as nonpolar PP, PE, OPP, and therefore the cohesive force of water-based ink resin and plastic film is the key that water color ink could use.Current domestic water-based ink resin is used for paper, and poor adhesive force on a plastic film limits the development of its water color ink.High-temperature cross-linking solidification can improve film adhesive, but plastics film high temperature is easily Texturized, even cuddles up in a heap.Therefore the room-temperature self-crosslinking water-based ink resin of exploitation plastics film high adhesive force has very important significance.
A kind of water soluble acrylic resin and preparation method thereof disclosed in Chinese invention patent application CN200710032124.8, a series of acrylic monomer is adopted in a solvent Raolical polymerizable to occur, add amine (ammonia) class material after insulation for some time and regulate pH, last thin up obtains product.This water soluble resin film is even, good leveling property, but film-forming properties is poor on the plastics film of low polarity, and sticking power is also poor.A kind of water soluble room temperature crosslinked double component propenoic resin paint and preparation method disclosed in Chinese invention patent application CN200510038379.6, be made up of A and B two component, B is solidifying agent.The resin paint film adhesive that this method obtains is good, hardness is high, alcohol resistance good, wear resistance is good, but needs two procedures time prepared by two components resin paint, application inconvenience during coating construction.A kind of multifunctional water-based ink disclosed in Chinese invention patent application CN200910043089, adopt the water color ink that the water soluble acrylic resin of two kinds of different molecular weights prepares for binder, good sticking power is had on the surface such as paper, cloth of strong polarity, and sticking power is poor on the plastics film of low polarity, glossiness and rub resistance poor.A kind of paper, plastics water-based ink disclosed in Chinese invention patent application CN200910039908.2, acrylic acid rosin glyceryl ester is adopted to be the water color ink that binder is prepared, cost is low, meet paper, plastics height light high fastness attachment requirement, but solubility promoter accounts for water color ink ratio about 15%, film solvent gas is highly seasoned, affects workers ' health.A kind of water-based printing ink emulsion for plastic foil disclosed in Chinese invention patent application CN201010119665.6, adopts butyl methacrylate, ethyl propenoate, methyl methacrylate, diacetone-acryloamide(DAA), Sulfothiorine, alcohol ether succinate sodium, buffer reagent, functional aid, ammoniacal liquor, softening water to be prepared from by reaction.This emulsion adds the bonding force that a kind of function monomer can improve water color ink and plastic film to a certain extent, but film crosslinking curing is inadequate, and the poor water resistance of film, glossiness is low.
Summary of the invention
The object of the invention is to overcome the deficiency that water color ink prints suitability on a plastic film, be provided in the Plastic film surface sticking power such as PE, PP, PO, BOPP excellent, water-tolerant, the high and environment amenable water-based ink resin binder of glossiness.
Another object of the present invention is the preparation method providing a kind of low-temperature self-crosslinking water-base resin.
Another object of the present invention is to provide the application of a kind of low-temperature self-crosslinking waterborne acrylic paint in water color ink.
Object of the present invention is achieved through the following technical solutions:
A kind of low-temperature self-crosslinking waterborne acrylic paint and preparation method thereof and application, is characterized in that: count by weight, be prepared from by following raw material
Described first kind monomer be selected from vinylbenzene, vinyl acetate, methyl acrylate, methyl methacrylate, ethyl propenoate, butyl acrylate, Isooctyl acrylate monomer two or more;
Described Equations of The Second Kind monomer be selected from methacrylic acid, vinylformic acid, methylene-succinic acid one or more;
The 3rd described class monomer be selected from Hydroxyethyl acrylate, hydroxyethyl methylacrylate, Propylene glycol monoacrylate, Rocryl 410 one or more;
The 4th described class monomer be selected from N hydroxymethyl acrylamide, N-hydroxyethyl acrylamide, glycidyl methacrylate, diacetone-acryloamide(DAA), acetoacetoxyethyl methacrylate one or more;
Described solvent be selected from the organic solvent of the larger good water solubility of polarity one or more;
Described initiator be selected from free radical type initiator one or more;
Described pH adjusting agent be selected from alkalescence amine (ammonia) class material in one or more;
First kind monomer described in above-mentioned resin formula is selected from the soft or hard monomer of different glass transition temperature in acrylic monomer respectively.Hard monomer can provide certain hardness for polymeric film, and soft monomer can provide certain suppleness.The monomer of different glass transition temperature proportioning can synthesize different glass transition temperature at the acrylate resin of 0 DEG C ~ 40 DEG C, and room temperature film-forming is good, and sticking power is good.
Equations of The Second Kind described in above-mentioned resin formula and the 3rd class monomer are selected from the functional monomer with carboxyl or hydroxyl, the crosslinking reaction point that not only can provide in the macromole of synthesis, these hydrophilic radicals also contribute to the aqueous stability improving resin, make the viscosity that resin keeps suitable, film good leveling property, glossiness is high.
4th class monomer described in above-mentioned resin formula is selected from its own band and responds the cross-linking monomer of active group, and this kind of monomer participates in polyreaction and generates macromole product, and in room temperature dried coating film process, these macromole are mutually wound around and crosslinkedly generate insoluble film.Under weak acid or weak base catalytic condition, between these active groups, dehydration reaction occurs, when there being water to exist in system, above-mentioned dehydration reaction is suppressed.
Solvent described in above-mentioned resin formula is selected from the organic solvent of the large good water solubility of polarity, not only as the medium of monomer reaction, and can serve as good solubility promoter when resin is water-soluble, make resin water-soluble better, more stable.
PH adjusting agent described in above-mentioned resin formula is selected from amine (ammonia) class material, not only can regulate the acid-basicity of resin, also as the solidifying agent of self-crosslinking resin, improves film adhesive.
A kind of preparation process of low-temperature self-crosslinking waterborne acrylic paint is as follows:
A quantitative solvent joins in band reflux exchanger reactor by (), stir and be warming up to 60 ~ 80 DEG C, obtaining mixed solvent after reflux stabilizes;
B quantitative first kind monomer, Equations of The Second Kind monomer, the 3rd class monomer, the 4th class monomer, initiator join in stirring tank by (), stir and after solid particulate dissolves completely, obtain mixing raw material in 30 minutes;
C mixing raw material in step a reactor is warming up to 70 ~ 80 DEG C by (), after reflux stabilizes, by the mixing raw material instillation reactor in step b, control temperature is at 70 ~ 80 DEG C, and time for adding is 2 ~ 4 hours;
D () dropwises after, maintain the temperature at 70 ~ 80 DEG C, react 1 ~ 2 hour;
E () insulation terminates after, underpressure distillation is carried out to obtained crude propylene acid ester resin, extracts unreacted monomer and most of solvent;
F () underpressure distillation terminates after, be cooled to 40 ~ 50 DEG C;
G () drips pH adjusting agent and regulates resin pH value to 7.5 ~ 8.5, add quantitative water, maintain the temperature at 40 ~ 50 DEG C, stir 30 ~ 60 minutes, cool the temperature to 40 DEG C, discharging after resin is completely water-soluble.
For the above-mentioned the 3rd object, a kind of low-temperature self-crosslinking waterborne acrylic paint of the present invention can directly be applied as water color ink binder; Or as water color ink binder a kind of raw material and self-crosslinking acrylic ester emulsion is composite applies, described acrylate resin and the proportion relation of emulsion are 1:0.6 ~ 1.2.
Low-temperature self-crosslinking waterborne acrylic paint or resin and latex composite compounding thing and aqueous color paste is composite applies, described water color ink binder and the proportion relation of aqueous color paste are 7:2 ~ 7:4, disperse 20 ~ 30 minutes under the rotating speed of 200 ~ 400rpm, stir and obtain water color ink.
The present invention has the following advantages and beneficial effect relative to prior art tool:
(1) low-temperature self-crosslinking, range of application is wider
General resin needs to add solidifying agent high temperature (>120 DEG C) baking could there is crosslinking reaction, above-mentioned acrylate resin adopts the cross-linking monomer with active group to participate in polyreaction, generates low temperature (<60 DEG C) self-crosslinking resin.Under weak acid or weak base catalytic condition, these active groups and crosslinking and curing agent generation dehydration reaction, when there being water to exist in system, above-mentioned dehydration reaction is suppressed.In resin coating film drying process, along with the volatilization of moisture, between active group, slowly there is dehydration reaction, generate closely crosslinked insoluble film, the base material of various room temperature or non-refractory environment can be widely used in.
(2) organic solvent content is lower than 3%, safer, environmental protection
General water-base resin directly adds the material dispersing and dissolvings such as water evenly and get final product after synthesizing mostly in a solvent, in resin obtained like this, organic solvent content is higher, and generally about 20%, although be alcohols material, but still volatile flavor produces.Above-mentioned acrylate resin extracts after residual monomer and solvent through underpressure distillation after Raolical polymerizable in a solvent, a small amount of water-miscible organic solvent serves as solubility promoter effect when adding amine substance and water dissolves is remained in resin, can improve the aqueous stability of water-base resin, and content is no more than 3% of water-base resin total amount.
(3) film has high adhesive force, strong basis material opacifying power
The solvent of water color ink is mostly the solvent that water isopolarity is strong, and plastics film PP, PE, BOPP etc. are non-polar substrates, and general water color ink is fine at the sticking power on the surface such as paper of high polarity, and the sticking power on the plastics film of low polarity is poor.Above-mentioned waterborne acrylic paint on a plastic film film-forming properties is fine, along with the volatilization of moisture in dried coating film process, between active group, crosslinking reaction occurs in resin, forms high adhesive force film with base material, and film is even, fine to the opacifying power of base material.
The technical indicator of the low-temperature self-crosslinking waterborne acrylic paint prepared as stated above is as follows:
Outward appearance: translucent micro-yellow liquor body
Solid content (%): 20 ± 1
PH value: 7.5 ~ 8.5
Viscosity (s): 35 ~ 40
Second-order transition temperature (DEG C): 5 ~ 40
The technical indicator of the water color ink prepared as stated above is as follows:
Color: consistent with standard specimen
Glossiness (60 °): >70
Viscosity (s): 45 ~ 60
First dryness (mm/30s): 8 ~ 15
Tinting strength (%): 98 ~ 105
Sticking power (%): 98 ~ 100
Resistance to blocking (%): 0 ~ 1
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but the scope of protection of present invention is not limited within the scope of embodiment expression.
The testing method of low-temperature self-crosslinking waterborne acrylic paint and water color ink that each example of the present invention implements preparation is all according to following standard testing
Outward appearance: visual inspection
Solid content: by GB/T2793-1995 standard test
PH value: measure with accurate pH test paper
Viscosity: GBT13217.4-2009
Second-order transition temperature: ASTMD6604-2000 (2009) e1
Color: GBT13217.1-2009
Glossiness: GBT13217.2-2009
First dryness: GBT13217.5-2009
Tinting strength: GBT13217.6-2009
Sticking power: GBT13217.7-2009
Resistance to blocking: GBT13217.8-2009
Embodiment 1
A kind of low-temperature self-crosslinking waterborne acrylic paint, count by weight, be made up of following raw material:
Preparation process is as follows:
A (), by 30g ethylene glycol monomethyl ether and 20gN, dinethylformamide joins in band reflux exchanger reactor, stirs and is warming up to 60 DEG C, obtaining mixed solvent after reflux stabilizes;
B 4g vinylbenzene, 15g methyl methacrylate, 21g ethyl propenoate, 4g vinylformic acid, 2g Hydroxyethyl acrylate, 1gN-n-methylolacrylamide, 1g diacetone-acryloamide(DAA) and 0.6g Diisopropyl azodicarboxylate join in stirring tank by (), stir and after solid particulate dissolves completely, obtain mixing raw material in 30 minutes;
C mixing raw material in step a reactor is warming up to 70 DEG C by (), after reflux stabilizes, by the mixing raw material instillation reactor in step b, control temperature is at 70 ~ 75 DEG C, and time for adding is 3.5 hours;
D () dropwises after, maintain the temperature at 75 DEG C, react 1 hour;
E () insulation terminates after, underpressure distillation is carried out to obtained crude propylene acid ester resin, extracts unreacted monomer and most of solvent;
F () underpressure distillation terminates after, be cooled to 45 DEG C;
G () drips 4g triethylamine and regulates resin pH value to 7.5 ~ 8.0, add 70g water, maintain the temperature at 45 DEG C, stir 30 minutes, cool the temperature to 40 DEG C, discharging after resin is completely water-soluble.
Gained low-temperature self-crosslinking waterborne acrylic paint, its technical indicator is as following table:
Outward appearance: translucent micro-yellow liquor body
Solid content (%): 20.25
PH value: 7.5 ~ 8.0
Viscosity (s): 38
Second-order transition temperature (DEG C): 30
Get the obtained low-temperature self-crosslinking waterborne acrylic paint of 70g composite with 25g aqueous color paste, under the rotating speed of 200rpm, dispersion 30 minutes, stirs and obtains water color ink.After testing, technical indicator is as follows:
Color: consistent with standard specimen
Glossiness (60 °): 72
Viscosity (s): 50
First dryness (mm/30s): 10
Tinting strength (%): 100
Sticking power (%): 100
Resistance to blocking (%): 0.
Embodiment 2
A kind of low-temperature self-crosslinking waterborne acrylic paint: count by weight, be made up of following raw material:
Preparation process is as follows:
A 35g propylene glycol monomethyl ether and 20g ethylene glycol monobutyl ether join in band reflux exchanger reactor by (), stir and be warming up to 70 DEG C, obtaining mixed solvent after reflux stabilizes;
B 20g vinyl acetate, 15g methyl acrylate, 5g Isooctyl acrylate monomer, 3g methacrylic acid, 2g Propylene glycol monoacrylate and 0.8g 2,2'-Azobis(2,4-dimethylvaleronitrile) join in stirring tank by (), stir and after solid particulate dissolves completely, obtain mixing raw material in 30 minutes;
C mixing raw material in step a reactor is warming up to 75 DEG C by (), after reflux stabilizes, by the mixing raw material instillation reactor in step b, control temperature is at 75 ~ 80 DEG C, and time for adding is 3 hours;
D () dropwises after, by 2gN-hydroxyethyl acrylamide instillation reactor, drip 20 minutes, after dropwising, maintain the temperature at 80 DEG C, react 2 hours;
E () insulation terminates after, underpressure distillation is carried out to obtained crude propylene acid ester resin, extracts unreacted monomer and most of solvent;
F () underpressure distillation terminates after, be cooled to 50 DEG C;
G () drips 2g trolamine, 3g ammoniacal liquor regulates resin pH value to 8.0 ~ 8.5, adds 65g water, maintains the temperature at 50 DEG C, stir 60 minutes, cool the temperature to 40 DEG C, discharging after resin is completely water-soluble.After testing, its technical indicator is as follows:
Outward appearance: translucent micro-yellow liquor body
Solid content (%): 19.52
PH value: 8.0 ~ 8.5
Viscosity (s): 35
Second-order transition temperature (DEG C): 5
Get the obtained low-temperature self-crosslinking waterborne acrylic paint of 70g composite with 35g aqueous color paste, under the rotating speed of 300rpm, dispersion 25 minutes, stirs and obtains water color ink.After testing, its technical indicator is as follows:
Color: consistent with standard specimen
Glossiness (60 °): 75
Viscosity (s): 45
First dryness (mm/30s): 8
Tinting strength (%): 98
Sticking power (%): 99
Resistance to blocking (%): 0.5
Embodiment 3
A kind of low-temperature self-crosslinking waterborne acrylic paint, count by weight, be made up of following raw material:
Preparation process is as follows:
A 25g ethylene glycol monoethyl ether and 15g 1-Methoxy-2-propyl acetate join in band reflux exchanger reactor by (), stir and be warming up to 80 DEG C, obtaining mixed solvent after reflux stabilizes;
B 35g methyl acrylate, 15g butyl acrylate, 2g methacrylic acid, 1g methylene-succinic acid, 1g Hydroxyethyl acrylate, 1g Rocryl 410,1.5g glycidyl methacrylate, 0.5g diacetone-acryloamide(DAA), 0.8g Diisopropyl azodicarboxylate and 0.4g benzoyl peroxide join in stirring tank by (), stir and after solid particulate dissolves completely, obtain mixing raw material in 30 minutes;
C mixing raw material in step a reactor is warming up to 80 DEG C by (), after reflux stabilizes, by the mixing raw material instillation reactor in step b, control temperature is at 80 DEG C, and time for adding is 4 hours;
D () dropwises after, maintain the temperature at 80 DEG C, react 2 hours;
E () insulation terminates after, underpressure distillation is carried out to obtained crude propylene acid ester resin, extracts unreacted monomer and most of solvent;
F () underpressure distillation terminates after, be cooled to 40 DEG C;
G () drips 3g thanomin, 3g ammoniacal liquor regulates resin pH value to 7.5 ~ 8.0, adds 80g water, maintains the temperature at 40 DEG C, stir 40 minutes, discharging after resin is completely water-soluble.After testing, its technical indicator is as follows:
Outward appearance: translucent micro-yellow liquor body
Solid content (%): 20.78
PH value: 7.5 ~ 8.0
Viscosity (s): 40
Second-order transition temperature (DEG C): 40
Get the obtained low-temperature self-crosslinking waterborne acrylic paint of 70g composite with 40g aqueous color paste, under the rotating speed of 400rpm, dispersion 20 minutes, stirs and obtains water color ink.After testing, its technical indicator is as follows:
Color: consistent with standard specimen
Glossiness (60 °): 70
Viscosity (s): 60
First dryness (mm/30s): 15
Tinting strength (%): 105
Sticking power (%): 100
Resistance to blocking (%): 1
Embodiment 4
A kind of low-temperature self-crosslinking waterborne acrylic paint, count by weight, be made up of following raw material:
Preparation process is as follows:
A (), by 30g ethylene glycol monobutyl ether and 20gN, dinethylformamide joins in band reflux exchanger reactor, stirs and is warming up to 70 DEG C, obtaining mixed solvent after reflux stabilizes;
B 15g methyl methacrylate, 5g butyl acrylate, 10g Isooctyl acrylate monomer, 4g vinylformic acid, 2g methylene-succinic acid, 1g hydroxyethyl methylacrylate, 1g acetoacetoxyethyl methacrylate, 0.4g 2,2'-Azobis(2,4-dimethylvaleronitrile) and 0.2g benzoyl peroxide join in stirring tank by (), stir and after solid particulate dissolves completely, obtain mixing raw material in 30 minutes;
C mixing raw material in step a reactor is warming up to 75 DEG C by (), after reflux stabilizes, by the mixing raw material instillation reactor in step b, control temperature is at 75 DEG C, and time for adding is 2 hours;
D () dropwises after, maintain the temperature at 75 DEG C, react 1 hour;
E () insulation terminates after, underpressure distillation is carried out to obtained crude propylene acid ester resin, extracts unreacted monomer and most of solvent;
F () underpressure distillation terminates after, be cooled to 40 DEG C;
G () drips 3g triethylamine and 5g ammoniacal liquor regulates resin pH value to 8.0 ~ 8.5, adds 60g water, maintain the temperature at 40 DEG C, stir 30 minutes, discharging after resin is completely water-soluble.After testing, the technical indicator of gained low-temperature self-crosslinking waterborne acrylic paint is as following table:
Outward appearance: translucent micro-yellow liquor body
Solid content (%): 20.51
PH value: 8.0 ~ 8.5
Viscosity (s): 38
Second-order transition temperature (DEG C): 20
Get the obtained low-temperature self-crosslinking waterborne acrylic paint of 70g composite with 30g aqueous color paste, under the rotating speed of 350rpm, dispersion 20 minutes, stirs and obtains water color ink.After testing, its technical indicator is as follows:
Color: consistent with standard specimen
Glossiness (60 °): 81
Viscosity (s): 55
First dryness (mm/30s): 13
Tinting strength (%): 100
Sticking power (%): 100
Resistance to blocking (%): 0
The Performance Detection index of comprehensive the various embodiments described above, it is good that the water color ink adopting above-mentioned each component to make both had had sticking power on low-temperature self-crosslinking film forming, plastics film, also has that glossiness is high, strong coloring force, first dryness is good, resistance to blocking is good, rub resistance is a good characteristic.The solvent of water color ink is water, alcohol ether solvent, and alcohol ether solvent content is lower than 3%, and greatly reduce the pollution of organic solvent volatilization to air, reducing the harm of toxic substance to human body and the pollution to package goods, is the product of a kind of safety, environmental protection.
It should be noted that above-described embodiment is that being not all prior art, is illustrative instead of determinate in order to explain embodiments of the invention.
Claims (6)
1. a low-temperature self-crosslinking waterborne acrylic paint, is characterized in that: count by weight, is made up of following raw material:
Described first kind monomer be selected from vinylbenzene, vinyl acetate, methyl acrylate, methyl methacrylate, ethyl propenoate, butyl acrylate and Isooctyl acrylate monomer two or more;
Described Equations of The Second Kind monomer be selected from methacrylic acid, vinylformic acid and methylene-succinic acid one or more;
The 3rd described class monomer be selected from Hydroxyethyl acrylate, hydroxyethyl methylacrylate, Propylene glycol monoacrylate and Rocryl 410 one or more;
The 4th described class monomer be selected from N ?n-methylolacrylamide, N ?one or more in hydroxyethyl acrylamide, glycidyl methacrylate, diacetone-acryloamide(DAA) and acetoacetoxyethyl methacrylate;
Described solvent is polarity, water miscible organic solvent;
Described initiator be selected from Diisopropyl azodicarboxylate, 2,2'-Azobis(2,4-dimethylvaleronitrile) and benzoyl peroxide one or more;
Described pH adjusting agent be selected from alkalescence amine or Ammonia material in one or more;
During preparation, first solvent is joined in reactor, stir and be warming up to 70 ~ 80 DEG C; Then first kind monomer, Equations of The Second Kind monomer, the 3rd class monomer, the 4th class monomer and initiator mixed dissolution is even, be then at the uniform velocity added dropwise in 2 ~ 4 hours in described reactor, control temperature of reaction at 70 ~ 80 DEG C, react 1 ~ 2 hour; In underpressure distillation to reactor, material solid content reaches 85 ~ 95%; Drip pH adjusting agent, add water, discharging after stirring.
2. a kind of low-temperature self-crosslinking waterborne acrylic paint according to claim 1, it is characterized in that: described solvent be selected from ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, 1-Methoxy-2-propyl acetate and N, N ?one or more in dimethyl formamide.
3. a kind of low-temperature self-crosslinking waterborne acrylic paint according to claim 1, is characterized in that: described pH adjusting agent be selected from thanomin, triethylamine, trolamine and ammoniacal liquor one or more.
4. claim 1 ?the preparation method of low-temperature self-crosslinking waterborne acrylic paint described in 3 any one, it is characterized in that comprising the steps:
A solvent joins in reactor by (), stir and be warming up to 70 ~ 80 DEG C;
B () is by even to first kind monomer, Equations of The Second Kind monomer, the 3rd class monomer, the 4th class monomer and initiator mixed dissolution, then be at the uniform velocity added dropwise in 2 ~ 4 hours in described reactor, control temperature of reaction at 70 ~ 80 DEG C, after dropwising, maintain the temperature at 70 ~ 80 DEG C, react 1 ~ 2 hour;
C () insulation reaction terminates after, then 70 ~ 80 DEG C, ?0.095～?0.085MPa condition under underpressure distillation carried out to reaction mass remove most of solvent, until material solid content reaches 85 ~ 95% in reactor;
D () underpressure distillation terminates after, be cooled to 40 ~ 50 DEG C, then drip pH adjusting agent and regulate reaction mass pH value to 7.5 ~ 8.5, add water, discharging after stirring, namely obtain low-temperature self-crosslinking waterborne acrylic paint.
5. the preparation method of low-temperature self-crosslinking waterborne acrylic paint according to claim 4, is characterized in that, described reactor is band reflux exchanger reactor.
6. claim 1 ?the application of low-temperature self-crosslinking waterborne acrylic paint in ink described in 3 any one, it is characterized in that: low-temperature self-crosslinking waterborne acrylic paint is as water color ink binder, directly and aqueous color paste is composite applies, the mass ratio of water color ink binder and aqueous color paste is 7:2 ~ 7:4.
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