CN108997835A - A kind of wear-resisting offset ink and its production technology - Google Patents

Abstract

The invention discloses a kind of wear-resisting offset inks, are made of the primary raw material of following parts by weight: 15-18 parts of pigment, 45-50 parts of epoxy acrylic resin, 20-25 parts of isopropanol, 10-15 parts of vegetable oil, 5-8 parts of vegetable fatty acid esters, modified clay 5-10 parts, modified Nano SiO₂5-10 parts, 3-4 parts of polyethylene wax, 1-2 parts of dispersing agent, 0.5-1 parts of defoaming agent, 0.5-1 parts of levelling agent；The invention also discloses the production technologies of the wear-resisting offset ink, include the following steps: step S1, with epoxy acrylic resin, isopropanol, vegetable oil, vegetable fatty acid esters preparation binder；Step S2, by binder, pigment, modified clay, modified Nano SiO₂Mixture high speed dispersion；Step S3, it grinds；Step S4, auxiliary agent is added to be uniformly mixed.The wear-resisting offset ink that the present invention processes, wearability is high, and glossiness is good, and storage stability is good, has good quality performance indicators and printability.

Description

A kind of wear-resisting offset ink and its production technology

Technical field

The invention belongs to offset ink technical fields, and in particular, to a kind of wear-resisting offset ink and its production technology.

Background technique

Offset ink needs to add to assign the performance that the ink after printing has abrasion-resistant when making offset ink A certain amount of wax ingredient.In the prior art, the production technology of offset ink is first by wax powder and varnish, vegetable oil and mineral oil It is stirred, is then ground to be prepared into wax liquor or slack wax, be then again directly appended to obtained wax liquor or slack wax Simply be dispersed with stirring to prepare offset ink in base ink.This wax liquor or slack wax are first prepared however, in the prior art It is then added to the production technology that offset ink is prepared in base ink, since wax liquor is pulpous state, and slack wax is paste, and since wax exists Degree of scatter in ink determines the wear-resisting property of ink, however, the wax liquor of pulpous state and slack wax paste are dispersed in Ji Mo respectively In total specific surface area it is smaller, i.e., wax liquor or slack wax base ink in degree of scatter it is relatively low, to cause obtained glue The wear-resisting property of printing ink is poor.In addition, during wax liquor or slack wax are added to the dispersion of base ink by the prior art, due to not having Have consideration dispersion condition, thus but also the degree of scatter of wax is not high, cause the wear-resisting property of the offset ink obtained by it compared with Difference.

Summary of the invention

The purpose of the present invention is to provide a kind of wear-resisting offset ink and its production technologies, by with epoxy acrylic tree Rouge, isopropanol, vegetable oil are primary raw material, produce offset printing ink binder, with it and pigment, modified clay, modified Nano SiO₂With processing aid etc., after fully dispersed grinding, obtained wear-resisting offset ink, wearability is high, and glossiness is good, storage Stability is good, has the quality performance indicators no less than tradition offset printing ink and good printability.

The purpose of the present invention can be achieved through the following technical solutions:

A kind of wear-resisting offset ink, is made of the primary raw material of following parts by weight: 15-18 parts of pigment, epoxy acrylic tree 45-50 parts of rouge, 10-15 parts of vegetable oil, 5-8 parts of vegetable fatty acid esters, is modified clay 5-10 parts, is modified 20-25 parts of isopropanol Nano-meter SiO_2₂5-10 parts, 3-4 parts of polyethylene wax, 1-2 parts of dispersing agent, 0.5-1 parts of defoaming agent, 0.5-1 parts of levelling agent；

The wear-resisting offset ink is process by following steps:

Step S1, under room temperature, slowly epoxy acrylic resin is added in isopropanol while stirring, after adding, is continued 30-40min is stirred, vegetable oil and vegetable fatty acid esters are added, 50-60min is stirred, is uniformly dispersed, binder is made；

Step S2, by the binder of 60%-70%, pigment, modified clay, modified Nano SiO₂It is placed in high speed disperser In, 1h is dispersed under the conditions of 3000r/min, mixture is made；

Step S3, then mixture is ground using three-roll grinder, before grinding, zirconium oxide bead is added as grinding Medium, is ground to fineness≤15 μm, and temperature of charge must not exceed 50 DEG C when grinding；

Step S4, remaining binder, dispersing agent, defoaming agent and levelling agent are added, stirs 1- under the conditions of 500r/min Wear-resisting offset ink is made in 2h.

Further, the vegetable oil is that soya-bean oil and tung oil are compounded according to mass ratio 2:1.

Further, the vegetable fatty acid esters is methyl soyate, soybean ethyl oleate, one in butyl oleate Or mixtures thereof kind.

Further, the epoxy acrylic resin is prepared by the following method:

(1) 0.56g ethoxylated dodecyl alcohol and 0.24g dodecyl ether sulfate are added to 30mL isopropanol In, magnetic agitation 55-60min is uniformly dispersed, and obtains compound emulsifying agent, and compound emulsifying agent is placed on constant temperature blender with magnetic force On, keep temperature be 15 DEG C, revolving speed 500r/min, sequentially add 8.4g ethyl methacrylate, 9.0g ethyl acrylate, 0.6g acrylic acid, the E-44 type epoxy resin (E-44) of 2.0g and the sodium borohydride of 0.3g, are stirred to react 40min, are made pre- Lotion, it is spare；

(2) sodium peroxydisulfate is dissolved in deionized water, is configured to the sodium peroxydisulfate solution that mass fraction is 0.3%, it is spare；

(3) it takes 20% above-mentioned pre-emulsion to be added in three-necked flask, and 66mL mistake is slowly added dropwise with constant pressure funnel Sodium sulphate reacts 45-50min at 76 DEG C, remaining pre-emulsion is added, and system temperature is risen to 79 DEG C, then be slowly added dropwise 160mL sodium peroxydisulfate solution, about 150min are added dropwise, and system temperature risen to 84 DEG C of heat preservation 0.5h after to be done, ammonia is added Water regulation system pH value is 8-9, is cooled to 40 DEG C, is filtered with 100 mesh filter screens, and epoxy acrylic resin is made.

Further, the modified clay is prepared by the following method:

Natural clay is crushed with pulverizer, crosses the screening of 120 mesh screens, then is placed in 105 DEG C of baking ovens dry 2-3h；It is dry Natural clay afterwards is mixed with the solid-to-liquid ratio of 1:5 with concentrated acid, stirs at low speed 125-130min in 82 DEG C of water-bath, will be stirred Suspension after mixing adds deionized water to dilute, and stands, and removes supernatant liquor, operates repeatedly, until its pH value reaches 6.7-7.1, Suspension after processing is transferred in evaporating dish, is placed in drying in drying box and for 24 hours, is obtained modified clay.

Further, the concentrated acid is nitration mixture made of the ratio of the concentrated sulfuric acid and concentrated nitric acid with 1:1.

Further, the modified Nano SiO₂It prepares by the following method:

(1) 24g Nano-meter SiO_2 is taken₂Powder is put into the three-necked flask equipped with 80mL acetone, ultrasonic disperse 90-100min, Then 15mL methyltriethoxysilane is added dropwise into flask, then 68mL distilled water is added dropwise, in 66 DEG C of isothermal reaction 7h, has reacted Immediately with dehydrated alcohol repeated filtration washing up to neutrality after, it then is dried in vacuo 5-6h at 45 DEG C, is made just modified SiO₂Powder；

(2) 12g just modified SiO is taken₂In 100mL isopropanol, 18mL silane coupling agent is added in ultrasonic disperse 60min KH570 reacts 7h at 75 DEG C, after reaction immediately with dehydrated alcohol repeated filtration washing until neutrality, true at 45 DEG C The dry 5-6h of sky, is made modified Nano SiO₂Powder.

A kind of production technology of wear-resisting offset ink, includes the following steps:

Step S1, under room temperature, slowly epoxy acrylic resin is added in isopropanol while stirring, after adding, is continued 30-40min is stirred, vegetable oil and vegetable fatty acid esters are added, 50-60min is stirred, is uniformly dispersed, binder is made；

Step S2, by the binder of 60%-70%, pigment, modified clay, modified Nano SiO₂It is placed in high speed disperser In, 1h is dispersed under the conditions of 3000r/min, mixture is made；

Step S3, then mixture is ground using three-roll grinder, before grinding, zirconium oxide bead is added as grinding Medium, is ground to fineness≤15 μm, and temperature of charge must not exceed 50 DEG C when grinding；

Step S4, remaining binder, dispersing agent, defoaming agent and levelling agent are added, stirs 1- under the conditions of 500r/min Wear-resisting offset ink is made in 2h.

Beneficial effects of the present invention:

(1) offset ink of the invention is ensuring acrylic resin glossiness using epoxy acrylic resin as binder Under the premise of, by introducing epoxy resin come acrylic resin modified to improve the adhesive force of water-based acrylic resin liquid and water-fast Property, as binder, improve the film forming of ink；

(2) present invention is added to modified clay in the raw material of offset ink, sour processing has been carried out to clay, due to model moral Hua Li and interaction of hydrogen bond, nanometer fibrous crystal mostly exists with fine and close aggregate form in clay, and acidification can Intergranular impurity cement and carbonate mineral in clay are decomposed, realizes the depolymerization of fiber interfascicular, so that the silicate in clay is brilliant Body structure becomes regular；The addition of modified Nano clay particle can increase the solid content of link stuff resin, higher solid content energy Accelerate the rate of drying of water-base resin, while the resin of higher solid content can improve industrial production efficiency, reduce transportation cost；

(3) present invention is added to modified Nano SiO in the raw material of offset ink₂Powder, modified Nano SiO₂Powder is to contain The Si-O-Si covalent for having a large amount of wearabilities good is uniformly mixed with resin system, forms dense coating；In addition, modified SiO₂The C=C double bond that particle surface is introduced into can be crosslinked with C=C double bond in resin reacts, generate it is even closer it is inorganic/ Organic coating greatly strengthens the wear-resisting property of ink after solidifying；

(4) present invention produces offset printing ink binder using epoxy acrylic resin, isopropanol, vegetable oil as primary raw material, With it and pigment, modified clay, modified Nano SiO₂With processing aid etc., after fully dispersed grinding, obtained wear-resisting glue Printing ink, wearability is high, and glossiness is good, and storage stability is good, has the quality performance indicators no less than tradition offset printing ink With good printability；Wear-resisting offset ink of the invention is due to without using the mineral oil solvents such as white spirit, nontoxic, nothing Evil, environmental protection, degradable regeneration can be widely applied to the environmentally friendly web offset printing for having strict demand.

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general Logical technical staff all other embodiment obtained without creative efforts belongs to what the present invention protected Range.

A kind of wear-resisting offset ink, is made of the primary raw material of following parts by weight: 15-18 parts of pigment, epoxy acrylic tree 45-50 parts of rouge, 10-15 parts of vegetable oil, 5-8 parts of vegetable fatty acid esters, is modified clay 5-10 parts, is modified 20-25 parts of isopropanol Nano-meter SiO_2₂5-10 parts, 3-4 parts of polyethylene wax, 1-2 parts of dispersing agent, 0.5-1 parts of defoaming agent, 0.5-1 parts of levelling agent；

In the pigment, yellow uitramarine is preferably or mixtures thereof one kind of pigment yellow 13, pigment yellow 17；Its red face Material is preferably or mixtures thereof one of fuchsin 6B, fuchsin 8B；Its blue pigment be preferably Phthalocyanine Blue BGS, phthalocyanine blue b one Or mixtures thereof kind；The preferably middle colour carbon black of its black pigment；

The vegetable oil is that soya-bean oil and tung oil are compounded according to mass ratio 2:1；

The price of soya-bean oil is minimum, and resourceful, easily obtains, but simple soya-bean oil is unable to satisfy ink in drying property side The demand in face；Tung oil is intermolecular to be occurred polymerization reaction (dry reaction), and hexa-atomic or octatomic ring type net macromolecular structure is formed, Therefore, the oxygen demand that tung oil film parches is less；In addition, due to eleostearic acid drying mainly with polymerization based on, so aoxidizing The oxidation product carboxylic acid generated in journey is also less, therefore more excellent by the water-fast and alkaline resistance properties of the ink ink film of tung oil production；

The vegetable fatty acid esters is one of methyl soyate, soybean ethyl oleate, butyl oleate or it is mixed Close object；

The dispersing agent is dibutyl phthalate or polyethylene glycol 200；

The defoaming agent is dimethicone or organic silicon defoamer；

The levelling agent is dimethyl silicone polymer or diacetone alcohol；

The polyethylene wax can be used as antiwear assistant, improve the dispersibility of filler, can be used as the carrier of pigment, improve ink Wearability；

The epoxy acrylic resin is prepared by the following method:

(1) 0.56g ethoxylated dodecyl alcohol and 0.24g dodecyl ether sulfate are added to 30mL isopropanol In, magnetic agitation 55-60min is uniformly dispersed, and obtains compound emulsifying agent, and compound emulsifying agent is placed on constant temperature blender with magnetic force On, keep temperature be 15 DEG C, revolving speed 500r/min, sequentially add 8.4g ethyl methacrylate, 9.0g ethyl acrylate, 0.6g acrylic acid, the E-44 type epoxy resin (E-44) of 2.0g and the sodium borohydride of 0.3g, are stirred to react 40min, are made pre- Lotion, it is spare；

(2) sodium peroxydisulfate is dissolved in deionized water, is configured to the sodium peroxydisulfate solution that mass fraction is 0.3%, it is spare；

(3) it takes 20% above-mentioned pre-emulsion to be added in three-necked flask, and 66mL mistake is slowly added dropwise with constant pressure funnel Sodium sulphate reacts 45-50min at 76 DEG C, remaining pre-emulsion is added, and system temperature is risen to 79 DEG C, then be slowly added dropwise 160mL sodium peroxydisulfate solution, about 150min are added dropwise, and system temperature risen to 84 DEG C of heat preservation 0.5h after to be done, ammonia is added Water regulation system pH value is 8-9, is cooled to 40 DEG C, is filtered with 100 mesh filter screens, and epoxy acrylic resin is made；

By introducing epoxy resin come acrylic resin modified to improve the adhesive force of water-based acrylic resin liquid and water-fast Property, as binder, improve the film forming of ink；

The modified clay is prepared by the following method:

Natural clay is crushed with pulverizer, crosses the screening of 120 mesh screens, then is placed in 105 DEG C of baking ovens dry 2-3h；It is dry Natural clay afterwards is mixed with the solid-to-liquid ratio of 1:5 with concentrated acid, stirs at low speed 125-130min in 82 DEG C of water-bath, will be stirred Suspension after mixing adds deionized water to dilute, and stands, and removes supernatant liquor, operates repeatedly, until its pH value reaches 6.7-7.1, Suspension after processing is transferred in evaporating dish, is placed in drying in drying box and for 24 hours, is obtained modified clay；

Wherein, concentrated acid is nitration mixture made of the ratio of the concentrated sulfuric acid and concentrated nitric acid with 1:1；

Due to Van der Waals force and interaction of hydrogen bond, nanometer fibrous crystal is mostly deposited with fine and close aggregate form in clay , and acidification can decompose intergranular impurity cement and carbonate mineral in clay, realize the depolymerization of fiber interfascicular, so that viscous Silicate crystal structure in soil becomes regular；The addition of modified Nano clay particle can increase the solid content of link stuff resin, Higher solid content can accelerate the rate of drying of water-base resin, while the resin of higher solid content can improve industrial production effect Rate reduces transportation cost；

Modified Nano SiO₂It prepares by the following method:

(1) 24g Nano-meter SiO_2 is taken₂Powder is put into the three-necked flask equipped with 80mL acetone, ultrasonic disperse 90-100min, Then 15mL methyltriethoxysilane is added dropwise into flask, then 68mL distilled water is added dropwise, in 66 DEG C of isothermal reaction 7h, has reacted Immediately with dehydrated alcohol repeated filtration washing up to neutrality after, it then is dried in vacuo 5-6h at 45 DEG C, is made just modified SiO₂Powder；

(2) 12g just modified SiO is taken₂In 100mL isopropanol, 18mL silane coupling agent is added in ultrasonic disperse 60min KH570 reacts 7h at 75 DEG C, after reaction immediately with dehydrated alcohol repeated filtration washing until neutrality, true at 45 DEG C The dry 5-6h of sky, is made modified Nano SiO₂Powder；

Modified Nano SiO₂Powder is uniformly to mix containing the good Si-O-Si covalent of a large amount of wearabilities with resin system It closes, forms dense coating；In addition, modified SiO₂The C=C double bond that particle surface is introduced into can be crosslinked with C=C double bond in resin Reaction, generates even closer inorganic/organic coating, greatly strengthens the wear-resisting property of ink after solidifying；

The production technology of the wear-resisting offset ink, includes the following steps:

Step S1, under room temperature, slowly epoxy acrylic resin is added in isopropanol while stirring, after adding, is continued 30-40min is stirred, vegetable oil and vegetable fatty acid esters are added, 50-60min is stirred, is uniformly dispersed, binder is made；

Step S2, by the binder of 60%-70%, pigment, modified clay, modified Nano SiO₂It is placed in high speed disperser In, 1h is dispersed under the conditions of 3000r/min, mixture is made；

Step S3, then mixture is ground using three-roll grinder, before grinding, zirconium oxide bead is added as grinding Medium, is ground to fineness≤15 μm, and temperature of charge must not exceed 50 DEG C when grinding；

It to be added during grinding abrasive media (zirconium oxide bead), cardinal principle is the high speed with grinder impeller Rotation, grinding bead applies shear action to pigment, while impeller itself generates centrifugal force, is realized and is divided by the collective effect of the two It dissipates, grinding distribution excellent effect；

Step S4, remaining binder, dispersing agent, defoaming agent and levelling agent are added, stirs 1- under the conditions of 500r/min Wear-resisting offset ink is made in 2h.

Embodiment 1

A kind of wear-resisting offset ink, is made of the primary raw material of following parts by weight: 15 parts of pigment, epoxy acrylic resin 45 Part, 20 parts of isopropanol, 10 parts of vegetable oil, 5 parts of vegetable fatty acid esters, modified 5 parts of clay, modified Nano SiO₂5 parts, polyethylene 3 parts of wax, 1 part of dispersing agent, 0.5 part of defoaming agent, 0.5 part of levelling agent；

Embodiment 2

A kind of wear-resisting offset ink, is made of the primary raw material of following parts by weight: 17 parts of pigment, epoxy acrylic resin 48 Part, 22 parts of isopropanol, 13 parts of vegetable oil, 7 parts of vegetable fatty acid esters, modified 8 parts of clay, modified Nano SiO₂8 parts, polyethylene 3.5 parts of wax, 1.5 parts of dispersing agent, 0.7 part of defoaming agent, 0.8 part of levelling agent；

Embodiment 3

A kind of wear-resisting offset ink, is made of the primary raw material of following parts by weight: 18 parts of pigment, epoxy acrylic resin 50 Part, 25 parts of isopropanol, 15 parts of vegetable oil, 8 parts of vegetable fatty acid esters, modified 10 parts of clay, modified Nano SiO₂10 parts, poly- second 3-4 parts of alkene wax, 2 parts of dispersing agent, 1 part of defoaming agent, 1 part of levelling agent；

The embodiment 1-3 offset ink being prepared is tested for the property, is specifically included as follows: referring to GB/T The viscosity of " 13217.4-2008 the liquid ink viscosity method of inspection " test ink；Referring to GB/T 13217.5 " at the beginning of liquid ink The stemness method of inspection " test ink first stemness；Referring to GB/T 1733-1993 " paint film water resistance measuring method " test ink Water resistance grade (1 grade, serious discoloration；2 grades, hence it is evident that discoloration；3 grades, slightly change colour；4 grades, it is basically unchanged color；It is 5 grades, non-discolouring)； Referring to the wearability of GB/T 7706-2008 " relief printing plate decoration printed matter " test layer of ink；Test result is as follows shown in table:

	Embodiment 1	Embodiment 2	Embodiment 3
				Viscosity (mPas)	32.4	33.6	32.9
First stemness (mm30s-1)	17.5	16.8	18.7
				Water-fast grade	4	4	5
Wearability/%	100	100	100

It is found that the viscosity for the offset ink that the present invention is prepared is greater than 32.4mPas, first stemness is greater than 16.8mm 30s^-1, water-fast grade reaches 4 grades or more, and wearability reaches 100%, the offset ink rate of drying that the present invention is prepared Fastly, with excellent water resistance and wearability.

Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification, It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only It is limited by claims and its full scope and equivalent.

Claims (8)

1. a kind of wear-resisting offset ink, which is characterized in that be made of the primary raw material of following parts by weight: 15-18 parts of pigment, epoxy 45-50 parts of acrylic resin, 20-25 parts of isopropanol, 10-15 parts of vegetable oil, 5-8 parts of vegetable fatty acid esters, modified clay 5- 10 parts, modified Nano SiO₂5-10 parts, 3-4 parts of polyethylene wax, 1-2 parts of dispersing agent, 0.5-1 parts of defoaming agent, levelling agent 0.5-1 Part；

The wear-resisting offset ink is process by following steps:

Step S1, under room temperature, slowly epoxy acrylic resin is added in isopropanol while stirring, after adding, continues to stir 30-40min adds vegetable oil and vegetable fatty acid esters, stirs 50-60min, is uniformly dispersed, and binder is made；

Step S2, by the binder of 60%-70%, pigment, modified clay, modified Nano SiO₂It is placed in high speed disperser, Disperse 1h under the conditions of 3000r/min, mixture is made；

Step S3, then mixture is ground using three-roll grinder, before grinding, zirconium oxide bead is added as grinding medium Matter, is ground to fineness≤15 μm, and temperature of charge must not exceed 50 DEG C when grinding；

Step S4, remaining binder, dispersing agent, defoaming agent and levelling agent are added, 1-2h is stirred under the conditions of 500r/min, is made Obtain wear-resisting offset ink.

2. a kind of wear-resisting offset ink according to claim 1, which is characterized in that the vegetable oil is that soya-bean oil and tung oil are pressed It is compounded according to mass ratio 2:1.

3. a kind of wear-resisting offset ink according to claim 1, which is characterized in that the vegetable fatty acid esters is soybean Or mixtures thereof one of methyl oleate, soybean ethyl oleate, butyl oleate.

4. a kind of wear-resisting offset ink according to claim 1, which is characterized in that the epoxy acrylic resin is by as follows Method preparation:

(1) 0.56g ethoxylated dodecyl alcohol and 0.24g dodecyl ether sulfate are added in 30mL isopropanol, magnetic Power stirring 55-60min is uniformly dispersed, and obtains compound emulsifying agent, compound emulsifying agent is placed in constant temperature blender with magnetic force, keep Temperature is 15 DEG C, revolving speed 500r/min, sequentially adds 8.4g ethyl methacrylate, 9.0g ethyl acrylate, 0.6g propylene Acid, the E-44 type epoxy resin (E-44) of 2.0g and the sodium borohydride of 0.3g, are stirred to react 40min, pre-emulsion are made, standby With；

(2) sodium peroxydisulfate is dissolved in deionized water, is configured to the sodium peroxydisulfate solution that mass fraction is 0.3%, it is spare；

(3) it takes 20% above-mentioned pre-emulsion to be added in three-necked flask, and 66mL persulfuric acid is slowly added dropwise with constant pressure funnel Sodium reacts 45-50min at 76 DEG C, remaining pre-emulsion is added, and system temperature is risen to 79 DEG C, then 160mL is slowly added dropwise Sodium peroxydisulfate solution, about 150min are added dropwise, and system temperature risen to 84 DEG C of heat preservation 0.5h after to be done, ammonium hydroxide is added and adjusts System pH value is 8-9, is cooled to 40 DEG C, is filtered with 100 mesh filter screens, and epoxy acrylic resin is made.

5. a kind of wear-resisting offset ink according to claim 1, which is characterized in that the modified clay is made by the following method It is standby:

Natural clay is crushed with pulverizer, crosses the screening of 120 mesh screens, then is placed in 105 DEG C of baking ovens dry 2-3h；After drying Natural clay is mixed with the solid-to-liquid ratio of 1:5 with concentrated acid, 125-130min is stirred at low speed in 82 DEG C of water-bath, after stirring Suspension add deionized water to dilute, stand, remove supernatant liquor, operate repeatedly, until its pH value reaches 6.7-7.1, will locate Suspension after reason is transferred in evaporating dish, is placed in drying in drying box and for 24 hours, is obtained modified clay.

6. a kind of wear-resisting offset ink according to claim 5, which is characterized in that the concentrated acid is the concentrated sulfuric acid and concentrated nitric acid Nitration mixture made of ratio with 1:1.

7. a kind of wear-resisting offset ink according to claim 1, which is characterized in that the modified Nano SiO₂By such as lower section Method preparation:

(1) 24g Nano-meter SiO_2 is taken₂Powder is put into the three-necked flask equipped with 80mL acetone, ultrasonic disperse 90-100min, then 15mL methyltriethoxysilane is added dropwise into flask, then 68mL distilled water is added dropwise, in 66 DEG C of isothermal reaction 7h, after the reaction was completed It then is dried in vacuo 5-6h at 45 DEG C up to neutrality with dehydrated alcohol repeated filtration washing immediately, just modified SiO is made₂Powder End；

(2) 12g just modified SiO is taken₂In 100mL isopropanol, 18mL silane coupling agent KH570 is added in ultrasonic disperse 60min, in 7h is reacted at 75 DEG C, after reaction immediately with dehydrated alcohol repeated filtration washing until neutrality, is dried in vacuo 5- at 45 DEG C Modified Nano SiO is made in 6h₂Powder.

8. a kind of production technology of wear-resisting offset ink, which comprises the steps of:

Step S1, under room temperature, slowly epoxy acrylic resin is added in isopropanol while stirring, after adding, continues to stir 30-40min adds vegetable oil and vegetable fatty acid esters, stirs 50-60min, is uniformly dispersed, and binder is made；

Step S2, by the binder of 60%-70%, pigment, modified clay, modified Nano SiO₂It is placed in high speed disperser, Disperse 1h under the conditions of 3000r/min, mixture is made；

Step S3, then mixture is ground using three-roll grinder, before grinding, zirconium oxide bead is added as grinding medium Matter, is ground to fineness≤15 μm, and temperature of charge must not exceed 50 DEG C when grinding；

Step S4, remaining binder, dispersing agent, defoaming agent and levelling agent are added, 1-2h is stirred under the conditions of 500r/min, is made Obtain wear-resisting offset ink.