CN101255296A - Polyurethane resin compound oil ink and method for manufacturing same - Google Patents
Polyurethane resin compound oil ink and method for manufacturing same Download PDFInfo
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- CN101255296A CN101255296A CN 200710027060 CN200710027060A CN101255296A CN 101255296 A CN101255296 A CN 101255296A CN 200710027060 CN200710027060 CN 200710027060 CN 200710027060 A CN200710027060 A CN 200710027060A CN 101255296 A CN101255296 A CN 101255296A
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Abstract
The invention discloses a polyurethane resin compound ink and preparation method thereof, comprising polyurethane resin, chloride-vinyl acetate resin, solvent, dye and dispersing auxiliary, wherein the solvent comprises methyl benzene, butanone, isopropyl alcohol. The composition of the polyurethane resin compound ink is: polyurethane resin liquor (30% solid content) 25-40%, chloride-vinyl acetate resin 0-4%, dye 5-25%, dispersing auxiliary 0.2-0.5%, methyl benzene 0-20%, butanone 25-35%, isopropyl alcohol 5-15%. The invention provides polyurethane resin compound ink with wide application range, good thermal stability, good adhesion and no aromatics solvent, in order to conquer the lacks such as not environment protection, narrow application range and bad thermal stability.
Description
[technical field]
The present invention relates to the urethane compound oil ink, the invention still further relates to the manufacture method of urethane compound oil ink.
[background technology]
It has been since main body connects the benzene dissolubility compound oil ink of material that China's printing ink manufacturing began to produce with the chlorinated polypropylene from the early 1980s, development is quite rapid between two more than ten years, and the technology of the manufacturing production of printing ink and printing use is all very ripe, but trend analysis from gravure composite printing ink, benzene dissolubility compound oil ink has the following shortcoming that is difficult to overcome in production and in the middle of using: (1) uses aromatic hydrocarbon solvent in a large number: use toluene because the main body of printing ink connects the material urethane resin in building-up process, and also need to dissolve with toluene; So the matrix resin of existing benzene dissolubility compound oil ink all is as true solvent with toluene, to use a large amount of toluene inevitably in the production of printing ink and in the middle of using, because resin is poor to the release property of toluene, the toxicity of toluene is very big, in food flexible packing, very easily cause the residual solvent of printing finished product excessive, thereby contaminated food products is to the quality and the safety generation influence greatly of food; (2) range of application is narrow: in the plastic compound flexible packaging industry, the most outer printing film of normal use is three kinds of BOPP, PET and BOPA, and benzene dissolubility compound oil ink only is applicable to the printing of BOPP and compound, PET and BOPA are all failed excellent sticking power and combined strength bination is provided, more can not be used for freezing, contain grease, boil, the packing of food such as boiling; (3) poor heat stability: because the poor heat stability of chlorinated polypropylene, in the production of printing ink and storage process, easily discharge chlorine and form hydrogenchloride, make printing ink become strongly-acid, thereby the package stability and the printing that have influence on printing ink are used.
Owing to exist above-mentioned these structural defects, benzene dissolubility compound oil ink can not adapt to China's requirement of flourishing soft packaging industry day by day gradually.In addition, for consideration and the strict day by day security legislation of adaptation to food safety and sanitation, people need the printing ink of environment-friendly type, promptly wish to reduce in the printing-ink as far as possible and the use of printing ink in the usage quantity of aromatic hydrocarbon solvents such as toluene, dimethylbenzene, or need not use the printing-ink of above-mentioned aromatic hydrocarbon solvent, therefore must develop the development that the more excellent compound oil ink of performance could adapt to current printing packaging industry.
[summary of the invention]
The present invention seeks to overcome prior art and used in a large number that not environmental protection of aromatic hydrocarbon solvent, range of application are narrow, the deficiency of poor heat stability, provide and not use aromatic hydrocarbon solvent, applied range, Heat stability is good, environment-protecting polyurethane compound oil ink that cementability is good.
The present invention is achieved by the following technical solutions:
Polyurethane resin compound oil ink and manufacture method thereof is characterized in that with urethane resin, vinyl chloride-vinyl acetate resin, solvent, pigment, dispersing auxiliary be raw material, and described solvent comprises toluene, butanone, Virahol, and concrete formula rate is:
Urethane resin liquid (30% solid content): 25%-40%
Vinyl chloride-vinyl acetate resin: 0-4%
Pigment: 5%-25%
Dispersing auxiliary: 0.2%-0.5%
Toluene: 0-20%
Butanone: 25%-35%
Virahol: 5%-15%
Aforesaid urethane compound oil ink and manufacture method thereof, the number-average molecular weight that it is characterized in that described urethane resin is 8000-100000.
Polyurethane resin compound oil ink and manufacture method thereof is characterized in that making through following complete processing step:
A) pre-dispersed, vinyl chloride-vinyl acetate resin liquid, urethane resin liquid, solvent and the dispersing auxiliary part by formula rate is joined respectively in the pre-mixing dispersion cylinder, starting high speed dispersor stirs it, the pigment that in whipping process, adds formula ratio then gradually, the rotating speed of dispersion machine is improved in the reinforced back that finishes, high speed dispersion is wetting fully so that pigment is carried out, and makes pre-dispersed mill base to be ground;
B) grind to disperse, pre-dispersed mill base is undertaken finely divided by grinding plant, the aggregate that separates pigment with external force makes it to become and meets the fine particle that ink technique requires, thereby obtains dispersible pigment color paste;
C) allotment, urethane resin liquid, vinyl chloride-vinyl acetate resin liquid and the solvent of remainder are joined in the dispersible pigment color paste, start high speed dispersor and stir evenly, and then viscosity, the form and aspect of printing ink are adjusted with abundant dispersing and mixing, thereby reach predetermined specification of quality, make finished product printing ink.
Purify packing, remove mechanical impurity by filter plant
Compared with prior art, the present invention has following advantage:
1, the present invention has done improvement to urethane resin synthetic, can not use or use on a small quantity aromatic hydrocarbon solvent, has reduced the discharging of aromatic hydrocarbon solvent in a large number, has satisfied environmental requirement fully.The usage ratio of toluene accounts for 50-70% (weight ratio, down together) in the common benzene dissolubility compound oil ink prescription, and the toluene consumption more accounts for 80%-100% in its thinner; And can be without toluene in the urethane compound oil ink prescription of the present invention, or use a spot of toluene, the toluene consumption generally is 10%-20%, toluene generally is no more than 40% in the printing ink reducer, whether with toluene mainly is from producing and the consideration of use cost aspect, be not that printing ink institute is essential, benzene dissolubility compound oil ink then must use toluene or dimethylbenzene.
2, dissolvent residual value of the present invention is low, because ink adhesive urethane resin, vinyl chloride-vinyl acetate resin are splendid to the release property of solvent, the extremely low and free from extraneous odour of dissolvent residual value of printing finished product, satisfy the requirement of food, drug packaging fully, under normal service condition, printing ink solvent residual quantity of the present invention can not surpass 3.0mg/m
2, the benzene kind solvent residual quantity can not surpass 1.0mg/m
2
3, applied range of the present invention, Heat stability is good, BOPP, PET, BOPA and K coating (PVDC) film etc. had good sticking power, all can provide good stripping strength to various composite packaging structures, adapt to the post-treatment requirement of varieties of food items packing, as freezing, boil and boil and high temperature steaming etc., can also be applicable to various complex methods in addition, compound as dry type, extrude compound and solvent-free compound etc., range of application ten/extensively.
4, the present invention has the characteristic of expansion, extension, common benzene dissolubility compound oil ink is subjected to its resin binder characteristic limitations, can not redevelop out the product of no benzene and pure dissolubility, and according to the characteristic of polyurethane resin binder, customizablely go out different solvents dissolved liquid resin, develop no toluene printing ink and do not have toluene and do not have butanone (ester alcohol is molten) printing ink,, further expand its range of application with different needs and the environmental requirement that adapts to various clients.
[description of drawings]
Fig. 1 is a process flow sheet of the present invention;
[embodiment]
Polyurethane resin compound oil ink and manufacture method thereof is characterized in that with urethane resin, vinyl chloride-vinyl acetate resin, solvent, pigment, dispersing auxiliary be raw material, and described solvent comprises toluene, butanone, Virahol, and concrete formula rate is:
Urethane resin liquid (30% solid content): 25%-40%
Vinyl chloride-vinyl acetate resin: 0-4%
Pigment: 5%-25%
Dispersing auxiliary: 0.2%-0.5%
Toluene: 0-20%
Butanone: 25%-35%
Virahol: 5%-15%
Urethane resin is after by vulcabond and macromolecule diol progressively polyaddition reaction taking place, and forms less than low molecule active hydrogen compounds chain extensions such as 500 polyamine or polyvalent alcohols through molecular weight again.
Wherein macromolecule diol can be known all macromolecule diols in the polyurethane industrial, and commonly used have polyester glycol, polyesteramide glycol, polyether glycol, polyether ester glycol, a polycarbonate diol etc.
Polyester glycol, polyesteramide glycol are by diamine such as diprotic acid and dibasic alcohol or hexamethylene-diamine, phenylenediamine, isophorone diamine, Monoethanolamine MEA BASF or amido alcohol etc. separately or the material that obtains through dehydration condensation of their mixture.The diprotic acid of using mainly contains: dicarboxylic acid and their acid esters such as succsinic acid, hexanodioic acid, sebacic acid, nonane diacid, terephthalic acid, m-phthalic acid, hexahydroterephthalic acid, hexahydro-m-phthalic acid, ester acid anhydride etc.Dibasic alcohol mainly contains: ethylene glycol, glycol ether, dipropylene glycol, 1, ammediol, 1,2-propylene glycol, 1,4-butyleneglycol, 1,5-pentanediol, neopentyl glycol, 1,8-ethohexadiol, 1,9-nonanediol, hexanaphthene-1,4-glycol, hexanaphthene-1,4-dimethanol, dipolymer acid glycol, the oxyethane of dihydroxyphenyl propane or the affixture of propylene oxide etc.Can also replace that 6-caprolactone, δ-Wu Neizhi, alkyl replace cyclic ester (being lactone) monomer ring-opening polymerization such as valerolactone and the polyester glycol of the lactone that obtains by-caprolactone, alkyl.
Polyether glycol mainly contains polyoxyethylene glycol, poly-(propylene oxide) ethylene glycol, poly-(oxidation tetramethylene) ethylene glycol etc.
The polyether ester glycol is can be by reactions such as above-mentioned polyether glycol and above-mentioned carboxylic acid or acid anhydrides and obtain.
Polycarbonate diol can be by hexylene glycol, 3-methyl-5-pentanediol, hexanaphthene-1,4-dimethanol etc. and diethyl carbonate, diphenyl carbonate reaction and the material that obtains.
These macromolecule diols also can be to form separately or by a plurality of macromolecule diols.In order to give pigment-dispersing, can also contain carboxyl, uncle's amino, sulfonic group etc. and their salt at intramolecularly.
Organic diisocyanate, preferred fat (cyclo) aliphatic diisocyanates and alicyclic diisocyanate.And in organic diisocyanate, aliphatic diisocyanate and (or) amount of substance of alicyclic diisocyanate must account for more than 50% of total amount.When aliphatic diisocyanate and (or) during the quantity not sufficient 50% of alicyclic diisocyanate, the easy xanthochromia of the resin of preparation, and combined strength bination is low.
Aliphatic diisocyanate and alicyclic diisocyanate, it can be hexamethylene diisocyanate, 1,4-butylidene vulcabond, lysinediisocyanate, isophorone diisocyanate, cyclohexyl diisocyanate, 4,4 '-dicyclohexyl methane diisocyanate, hydrogenation xylylene isocyanic ester, hydrogenation Three methyl Benzene dimethyl vulcabond, 2-methylpentane-1, the 5-vulcabond, 3-methylpentane-1, the 5-vulcabond, 2,2,4-tri-methyl hexamethylene-1,6 vulcabond, 2,4,4-tri-methyl hexamethylene-1,6-vulcabond etc. or their mixture.
Wherein, if consider attractive in appearance etc. behind the solvability of solvent and the ink printing, be best with the isophorone diisocyanate.
Can with above-mentioned aliphatic diisocyanate and (or) in the alicyclic two isocyanide ester esters and the organic diisocyanate of usefulness have: 4,4 '-diphenylmethanediisocyanate, 2, the 4-diphenylmethanediisocyanate, 4,4 '-phenylbenzene bismethane vulcabond, 4,4 '-the dibenzyl vulcabond, 1, the 5-naphthalene diisocyanate ester, to phenylene vulcabond, tolylene-2, the 4-vulcabond, tolylene-2, aromatic diisocyanates such as 6-vulcabond, the O-phthalic group diisocyanate, between the xylylene vulcabond, terephthaldehyde's group diisocyanate, difficult xanthochromic vulcabond or their mixtures such as tetramethyl-benzene dimethyl vulcabond.
The low molecular activity hydrogen compound of molecular weight less than 500 can be polyamine, polyvalent alcohol, monoamine, monohydroxy-alcohol, amino alcohol etc. among the present invention, but preferentially chooses two functional active dydrogen compounds or a sense and two functional mixed active hydrogen compounds.
Polyamine is commonly used diamines or their mixtures such as isophorone diamine, two cyclohexanediamine.
Polyvalent alcohol: ethylene glycol, 1,2-propylene glycol, 1, ammediol, 1, the 2-butyleneglycol, 1, the 3-butyleneglycol, 1, the 4-butyleneglycol, neopentyl glycol, 1, the 2-pentanediol, 1, the 3-pentanediol, 1, the 4-pentanediol, 1, the 5-pentanediol, the 2-methyl isophthalic acid, the 5-pentanediol, the 3-methyl isophthalic acid, the 5-pentanediol, 1, the 6-hexylene glycol, 2,2,3-trimethylammonium-1, ammediol, 2-ethyl-1, the 3-hexylene glycol, 2,2-diethyl-1, ammediol, 2-normal-butyl-1, ammediol, the dibasic alcohol of the ethylene oxide adduct of dihydroxyphenyl propane and the propylene oxide adduct of dihydroxyphenyl propane, or tricarboxylic methylpropane, glycerine, trivalent alcohols such as hexanetriol.
Monoamine: primary amine such as ethamine, propylamine, butylamine, secondary amine such as diethylamine, dibutylamine.
Monohydroxy-alcohol: methyl alcohol, ethanol, propyl alcohol, Virahol, 2-Ethylhexyl Alcohol etc.
Amino alcohol can use Monoethanolamine MEA BASF etc.
The catalysts of urethane resin can use known so-called urethane esterification catalyzer.Specifically can be organic amines such as organometallic compounds such as dibutyl tin laurate, two lauric acid dioctyl tins and triethylenediamine, triethylamine and its esters etc.
Need to use inert solvent commonly used in the polyurethane industrial in the middle of the urethane resin building-up process, can make by known method.Inert solvent has esters solvents such as aromatic hydrocarbon solvents such as toluene, dimethylbenzene, ethyl acetate, butylacetate; Ketones solvent such as butanone, pimelinketone; Ethyl cellosolve acetate, propylene glycol methyl ether acetate, ethyl-ether solvents such as glycol ether ester solvent, tetrahydrofuran (THF), diox such as 3-ethoxy-c acid esters; Dimethyl formamide, dimethyl acetone, N-Methyl pyrrolidone isopolarity solvent, and then in low molecule reactive hydrogen chain extension, use alcoholic solvents such as Virahol, ethanol.
Two kinds of making methods of urethane resin: first method is exactly all to contain the material of active hydrogen composition such as uniform mixing such as dibasic alcohol, diamine in reactor, at 30 ℃～100 ℃, preferably get under 50 ℃-90 ℃, react until the molecular weight that reaches regulation with organic diisocyanate; Second method: (1) is first at 30 ℃～100 ℃ with macromolecule diol, preferably get 50 ℃-90 ℃ following and organic diisocyanate reactions, make the urethane prepolymer that contains isocyanate group, (2) make chain extension with low molecular activity hydrogen compound and reaction are stopped.
The angle of the homogeneous polymer that is easy to get calmly solution is set out, and adopts second method more more superior than first method.Below second method is described in detail:
When making urethane resin, at first macromolecule diol usefulness is not diluted aptly with ketone, ester class or the arene equal solvent of active hydrogen.Then, in this mixing solutions, add organic diisocyanate, and then after adding the catalyzer of for example urethane esterification, in temperature is 30 ℃-100 ℃ scope, carry out reaction in 4-10 hour, make the urethane prepolymer that contains isocyanate group.The working conditions of various raw materials is preferably pressed raw material NCO base/OH base (mol ratio) and is the scope of 1.1-2.5 at this moment, uses in the scope of preferred 1.5-2.0.During the mol ratio less than 1.1 of raw materials used NCO base/OH base, the weather resistance of the final urethane resin that obtains and resistance to blocking reduce; When the mol ratio of NCO base/OH base surpasses 2.5, the final urethane resin that obtains in solvent solvability and reduce as the binding property of printing ink.
In the polyurethane prepolymer solution that contains isocyanate group that so obtains, preferably carry out chain extension earlier and carry out chain termination again, add low molecular activity hydrogen compound in 30 ℃-50 ℃ temperature range, react until the isocyanate group disappearance, thereby obtain as printing-ink with connecting the polyurethane resin solution of expecting.
The resinoid number-average molecular weight of the urethane that makes as stated above is advisable with 8000-100000, preferred 10000-50000.During the number-average molecular weight less than 8000 of urethane resin, can be relatively poor with this urethane as drying property, resistance to blocking and the weather resistance of printing-ink; When number-average molecular weight surpassed 100000, the viscosity of printing ink can be higher, mobile variation, and gloss becomes mute and pigment-dispersing reduces.
When using this urethane resin to make printing-ink, suitably add various pigment, solvent, use common printing ink producing apparatuss such as dispersion machine, sand mill again, just can make printing compound oil ink of the present invention by dispersion, grinding etc.In addition, beyond the urethane resin as matrix resin of the present invention, as required can also be with resin as follows as the additional material that connects, for example soluble cotton, vinyl chloride-vinyl acetate copolymer, rosin based resin etc.
Below specify the preparation of urethane resin of the present invention with example:
(1) in having 2 liters of four-hole boiling flasks of agitator, thermometer, reflux condensing tube and rare gas element ingress pipe, the number-average molecular weight of packing into is 1000 modification polycaprolactone glycol 257g, and butanone 200g evenly stirs.
(2) in above-mentioned polyhydric alcohol solutions, add isophorone diisocyanate 1.9g and as the catalyzer two lauric acid dioctyl tin 0.08g of urethane esterification, in 80 ℃ of reactions 4 hours, obtain to contain two and terminally be the polyurethane prepolymer of isocyanate group.
(3) in polyurethane prepolymer solution, add butanone 500g, behind the ethyl acetate 420g uniform mixing, add the mixing solutions of Virahol 280g, isophorone diamine 42g and Monoethanolamine MEA BASF 2g again, react until isocyanate group in 40 ℃ and to disappear, obtain urethane resin, add an amount of acetic acid ethyl ester at last it is diluted to 30% solid content.
Urethane resin viscosity by the said process preparation is that 3000CP (25 ℃), number-average molecular weight are 21000.
The urethane compound oil ink has two kinds of the benzene of containing type and benzene-free types.Benzene-free type uses the non-aromatic kind solvent, as butanone, vinyl acetic monomer, n-propyl acetate, Virahol, n-propyl alcohol etc.Urethane resin of the present invention in building-up process by to the adjustment of its microtexture, thereby do not need to use toluene when making its dissolving, and be to use butanone, Virahol as dissolution with solvents.Wherein butanone is true solvent, and Virahol is a solubility promoter, and it is better to the dissolving meeting of urethane resin that both mix use, and toluene does not have any effect to dissolving resin, does not need to add.In addition, for the consideration of aspects such as production cost and drying and volatilizing speed, can adopt vinyl acetic monomer, two kinds of solvents of n-propyl acetate to be used to substitute toluene.Need in the printing ink use just can use to certain viscosity with solvent cut, do not need to use toluene in the thinner equally, can adopt proportioning be butanone 40%, n-propyl acetate 40%, Virahol be 20% or butanone 50%, vinyl acetic monomer 30%, n-propyl alcohol be that 20% mixed solvent dilutes.
With the white ink is example, and its concrete proportioning is:
Urethane resin liquid (30% solid content): 25%
Vinyl chloride-vinyl acetate resin: 3.5%
Dispersion agent: 0.3%
Titanium dioxide: 25%
Toluene (or n-propyl): 13.2%
Butanone: 25%
Virahol: 8%
Vinyl chloride-vinyl acetate resin is meant vinylchlorid and two kinds of monomeric multipolymers of vinyl acetate between to for plastic in the prescription, and its molecular formula is:
Vinyl chloride-vinyl acetate resin and urethane resin have good consistency, and can give urethane resin better pigment-dispersing.
Selection of pigment is an example with the five primaries of printing usefulness, and white pigment can be selected the titanium dioxide of rutile-type for use, as C.I.Pigment White 6; Black pigment can be selected carbon black for use, as C.I.Pigment Black 7; Yellow ultramarine can be selected diarylide yellow for use, as C.I.PigmentYellow 14; Red pigment can select for use azo lake red, as C.I.Pigment Red 57:1; Blue pigments can be selected phthalocyanine blue for use, as C.I.Pigment Blue 15:4.
Dispersing auxiliary: generally be to select for use some to have auxiliary agent to the wet pigments dispersiveness, Ricinate can shorten the printing ink mill base and grind the dispersive time, reduce the consumption of the energy, guarantee that ink system is in stable status, to performance decisive role such as the pigment-dispersing of printing ink, depth of shade.
Polyurethane resin compound oil ink is made up of resin, solvent, pigment and a little auxiliary etc., and it is even, the stable dispersion of solid pigment in filmogen solution or dispersion liquid.The production process of printing ink is blended into the pigment solids particle in the resin dispersion liquid exactly, makes it to form an even fine suspended dispersed body.Polyurethane resin compound oil ink is to make through following complete processing step:
(a) pre-dispersed, pigment is mixed with the part resin liquid earlier in a locking equipment, disperse to make the pre-dispersed mill base of pigment with high speed dispersor then.Pre-dispersed is first procedure that printing ink is produced, and its purpose is: 1. pigment and resin liquid, auxiliary agent etc. are mixed; 2. make resin liquid replace the adsorbed air of part surface of pigments etc., make pigment obtain fractional wettability; 3. tentatively smash big pigment aggregate.Thereby this procedure to be being mixed into the master, and plays the part dissemination, and it is to grind the supporting operation of dispersive.
Concrete operations are by the quantity that prescription is stipulated vinyl chloride-vinyl acetate resin liquid, urethane resin liquid, solvent and dispersing auxiliary to be joined pre-mixing respectively by formula rate to disperse in the cylinder, starting high speed dispersor stirs it, the pigment that under stirring state, adds formula ratio then gradually, after finishing, throwing improves the rotating speed of dispersion machine, high speed dispersion 40 minutes is wetting fully so that pigment is carried out, and at this moment will make pre-dispersed mill base to be ground.
(b) grind dispersion, be with above-mentioned mill base after pre-dispersed, undertaken finely divided by various grinding plant, pigment particles is dispersed in the resin liquid, open and the big aggregate that separates pigment with external force, make it to become the fine particle that meets the ink technique requirement, thereby obtain qualified dispersible pigment color paste, reach the dispersive purpose.
Concrete operations are above-mentioned pre-dispersed mill base to be entered in the horizontal sand mill grind, and utilize central grinding medium granulated glass sphere of horizontal sand mill or zirconium pearl etc., and generation surging force and shearing force are ground dispersion when impact and mutual rolling or slip.Generally needing to grind just can make the fineness of mill base reach requirement twice or three times, is less than 15 μ m for the fineness requirement of polyurethane ink mill base.
(c) allotment, the qualified dispersible pigment color paste with grinding obtains adds remaining composition, mixes colours in case of necessity, to reach the specification of quality of printing ink.
Concrete operations are to join in the dispersible pigment color paste by urethane resin liquid, vinyl chloride-vinyl acetate resin liquid and the solvent of prescription quantity with remainder, start high speed dispersor stir 20-30 minute even with abundant dispersing and mixing, and then viscosity, the form and aspect of printing ink are adjusted, thereby reach predetermined specification of quality, make finished product printing ink.
(d) purify packing, remove mechanical impurity and coarse grain, then packing by filter plant.
Concrete operations are after above-mentioned printing ink finished product is purified with 150 order sand net filtrations, to carry out pound and claim metering, and staff packing back warehouse-in is stored.
Urethane compound oil ink of the present invention, accessible every performance index:
| Project | Index |
| Color | Approximate standard specimen |
| Tinting strength (%) | 95-110 |
| Fineness (um)≤ | 15 |
| Viscosity (being coated with 4 glasss/second/25 ℃) | 20-70 |
| Attachment fastness 〉= | 95% does not come off |
| First dryness (mm) | 20-50 |
| Water boiling resistance (100 ℃/30min) | Nondiscoloration does not separate |
| Surface tension, (N/cm) 〉= | 38×10 -5 |
| Solvent residual amount (mg/m 2)≤ | 30 |
Claims (3)
1. polyurethane resin compound oil ink and manufacture method thereof is characterized in that with urethane resin, vinyl chloride-vinyl acetate resin, solvent, pigment, dispersing auxiliary be raw material, and described solvent comprises toluene, butanone, Virahol, and concrete formula rate is:
Urethane resin liquid (30% solid content): 25%-40%
Vinyl chloride-vinyl acetate resin: 0-4%
Pigment: 5%-25%
Dispersing auxiliary: 0.2%-0.5%
Toluene: 0-20%
Butanone: 25%-35%
Virahol: 5%-15%
2. urethane compound oil ink according to claim 1 and manufacture method thereof, the number-average molecular weight that it is characterized in that described urethane resin is 8000-100000.
3. polyurethane resin compound oil ink and manufacture method thereof is characterized in that making through following complete processing step:
A) pre-dispersed, vinyl chloride-vinyl acetate resin liquid, urethane resin liquid, solvent and the dispersing auxiliary part by formula rate is joined respectively in the pre-mixing dispersion cylinder, starting high speed dispersor stirs it, the pigment that in whipping process, adds formula ratio then gradually, the rotating speed of dispersion machine is improved in the reinforced back that finishes, high speed dispersion is wetting fully so that pigment is carried out, and makes pre-dispersed mill base to be ground;
B) grind to disperse, pre-dispersed mill base is undertaken finely divided by grinding plant, the aggregate that separates pigment with external force makes it to become and meets the fine particle that ink technique requires, thereby obtains dispersible pigment color paste;
C) allotment, urethane resin liquid, vinyl chloride-vinyl acetate resin liquid and the solvent of remainder are joined in the dispersible pigment color paste, start high speed dispersor and stir evenly, and then viscosity, the form and aspect of printing ink are adjusted with abundant dispersing and mixing, thereby reach predetermined specification of quality, make finished product printing ink.
D) purify packing, remove mechanical impurity and coarse grain, then packing by filter plant.
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