CN102634251B - Photo-curing silk screen pearly-luster ink applicable to different printing substrates and preparation method thereof - Google Patents

Abstract

The invention provides a photocurable screen pearlescent ink suitable for different printing substrates and a preparation method. The ink is prepared from the following components by weight percentage: 5-60% polyurethane acrylate, acrylate pre-prepared 1-30% polymer, 1-20% adhesion-promoting resin that can participate in curing, 0-30% monomer, 5-25% pearlescent pigment, 0-40% solvent, and 2-15% photoinitiator. The UV-curable screen pearlescent ink suitable for different printing substrates of the present invention can be applied to different printing substrates at the same time, including paper, PET, BOPP, PP, PE and other plastic substrates and metal substrates, and various substrates Both have good adhesion, good flexibility and abrasion and scratch resistance, excellent acid and alkali resistance, excellent resistance to various solvents, and can meet the requirements of screen printing.

Description

Photocurable screen pearlescent ink suitable for different printing substrates and preparation method thereof

technical field

The invention relates to an ultraviolet light curing pearlescent screen ink and a preparation method thereof, which are used for high-speed rotary printing.

Background technique

In recent years, with the development of industrial technology, the application of screen printing technology in the field of anti-counterfeiting has developed rapidly. It has some obvious advantages, such as letterpress, gravure, lithography and other printing methods that are difficult to print. Printing materials and various products, All can be printed by screen printing, which is conducive to the full embodiment of the anti-counterfeiting effect, such as printing some pressure-sensitive optical inks and magnetic inks on the surface of flexible plastic films, paper and fabrics. As a printing method with special effects, pearlescent pigments can produce elegant, unique, soft and pleasing visual effects on the surface of printed matter by virtue of its unique pearl luster. It is unique and has become a popular anti-counterfeiting and decorative printing technology. The application of pearlescent screen ink can well reflect the unique effect of pearlescent, and it has been widely used in the fields of banknotes, securities, packaging and labels.

UV-curable ink is an environmentally friendly ink that has developed rapidly in recent years. At present, UV-curable ink has become a relatively mature ink technology. Its pollution emission is zero, and it has the reputation of energy-saving and environmentally friendly "green" products. UV-curable ink can be cured instantly, and the printed product has good chemical corrosion resistance, which is suitable for high-speed rotary printing. At the same time, the development of industrial technology has also enriched the printing substrates of inks. Inks are no longer only printed on paper, but also include plastic substrates such as PET, BOPP, PP, PE, and metal substrates. Therefore, inks and various substrates are required. It has good bonding fastness and meets the printing needs of different substrates.

But present photocurable screen pearlescent ink, as disclosed technology of publication number CN101805541A patent, also has the defective that can not be suitable for different printing substrates; As the technology disclosed of publication number CN101665643A patent, suitable substrate is paperboard, PVC card And BOPP, did not mention PET, PP and other substrates that are more difficult to adhere to, and cannot meet the needs of related fields.

Contents of the invention

The technical problem to be solved by the present invention is to provide a photocurable screen pearlescent ink suitable for different printing substrates and a preparation method to overcome the above-mentioned defects in the prior art.

The photocurable screen pearlescent ink suitable for different printing substrates according to the present invention is prepared from components comprising the following weight percentages:

Preferably, it is prepared by using the following components in weight percentage:

The viscosity of the ink is 0.1-1 Pa·s (25°C, flat plate, shear rate 300s ^-1 ).

Described urethane acrylate can adopt commercialized product, as RAHN company trade mark is the product of GENOMER 4267, Cytec company trade mark is the product of IRR 590, the product of Sartomer company CN9018, the viscosity when it is 60 ℃ is greater than 5000cps;

The acrylate prepolymer is selected from more than one of epoxy acrylate, polyester acrylate or polyether acrylate, epoxy acrylate such as BASF's brand is the product of Laromer 8986, polyester acrylate such as BASF The company's brand is Laromer LR 9004, and the polyether acrylate such as IGM's product is Photomer 5662;

Described adhesion promotion resin is selected from more than one in acid-modified acrylate, chlorinated polyester acrylate or pure acrylate resin, can adopt commercially available products, such as the acid-modified product of CN147 of Sartomer company trade mark Acrylate products, chlorinated polyester acrylate products of EBECRYL 436 and pure acrylate products of EBECRYL 745 from Cytec Industrial Co., Ltd.;

The monomer is selected from 1,6 hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), trimethylolpropane triacrylate (TMPTA), dipropylene glycol diacrylate (DPGDA) , phenol ethyl acrylate (PEA), ethoxylated trimethylolpropane triacrylate (EOTMPTA), propoxylated trimethylolpropane triacrylate (POTMPTA) or 1,6-hexanedi One or more of alcohol methoxy monoacrylate (HDOMEMA), etc.;

The pearlescent pigment is a sandwich lamella composed of mica, silicon dioxide, aluminum oxide or borosilicate flakes coated with titanium dioxide and ferric oxide. Commercially available products can be used, such as Lumina Gold 9Y30D from BASF. The product of Merck, the product of Merck's trade mark is Pyrisma T40-24Green, etc.

The solvent is one or more of ester solvents, ether solvents or ether ester solvents; the ester solvents are such as n-butyl acetate, n-pentyl acetate, etc., and the ether solvents are such as propylene glycol ether, ethylene glycol Alcohol dimethyl ether, ethylene glycol mono-n-butyl ester, etc., the ether ester solvents such as propylene glycol methyl ether propionate, diethylene glycol butyl ether acetate, 3-ethoxy ethyl propionate, etc.;

The rheological additive is selected from more than one of polyethylene wax, polyamide wax or fumed silica, and is used to change the rheological properties of the ink. Commercially available products can be used, such as Deqian company's trade mark DeuRheo 201 polyethylene wax;

The wetting and dispersing agent is selected from polymer copolymers (BYK company brand is DISPERBYK-2025), fatty acids (Evonik company brand is TEGO Dispers 610), aliphatic amides (DISPERBYK-2029) and modified polyether (Win The brand name of the founding company is TEGO Dispers 650), etc.;

The substrate wetting agent is selected from polyether modified silicone (Evonik's trade mark is TEGO Wet KL 245), fluorine-modified polymer (BYK Company BYK-340) or hydrocarbons (Evonik's trade mark is TEGO 500), etc.;

Described antifoaming agent is selected from organomodified polysiloxane (BYK company's trade mark is BYK-054), polyether siloxane copolymer (Evonik's trade mark is TEGO Foamex 840), fluorosilicone solution (Evonik's The company brand is TEGO Airex 931) or silicone-free organic polymer (BYK company brand is BYK-1790);

The leveling agent is selected from polyether modified polysiloxane (BYK company brand is BYK-333), organically modified polysiloxane (Evonik company brand is TEGO Glide 420) or polydimethylsiloxane (BYK company BYK-UV 3500);

Described photoinitiator is more than one in benzophenone, α-hydroxy ketone, α-amino ketone, monoacyl phosphine or diacyl phosphine, can adopt commercially available product, as the α- Amino ketones and mixtures of diacylphosphine and α-hydroxyketones of Irgacure 2022, as well as products such as monoacylphosphine of Omnirad TPO-L and α-hydroxyketones of Omnirad 1000 from IGM;

The preparation method of the light-cured screen pearlescent ink suitable for different printing substrates may further comprise the steps:

(1) Polyurethane acrylate, acrylate, polyester acrylate, polyether acrylate, adhesion promoting resin that can participate in curing, monomer, solvent, substrate wetting agent, rheology additive, defoamer and The leveling agent is mixed, stirred and dispersed to obtain the screen ink binder;

(2) Add pearlescent pigment, stir and disperse;

(3) adding a photoinitiator before printing, stirring and dispersing to obtain the photocurable screen pearlescent ink suitable for different printing substrates.

The UV-curable screen pearlescent ink suitable for different printing substrates of the present invention can be applied to different printing substrates at the same time, including paper, PET, BOPP, PP, PE and other plastic substrates and metal substrates, and various substrates Both have good adhesion, good flexibility and abrasion and scratch resistance, excellent acid and alkali resistance, excellent resistance to various solvents, and can meet the requirements of screen printing.

Detailed ways

Example 1

The formula is shown in Table 1:

Table 1

Preparation:

(1) mixing each raw material except the pearlescent pigment and the photoinitiator, stirring and dispersing, to obtain the connecting material of the screen ink;

(2) Add pearlescent pigment, stir and disperse;

(3) Add a photoinitiator before printing, stir and disperse for 40 minutes, and the photocurable screen pearlescent ink suitable for different printing substrates can be obtained. ^-1 ).

Tested by GBT 7707-2008 standard, it has good adhesion to PET, BOPP and other plastic substrates and paper. When printed by KBA-Giori's high-speed rotary screen printing machine, it has excellent printability and can print 10,000 sheets per hour. It can dry in time at high speed, the pearlescent effect of the printed matter is obvious, the lines are clear, and the physical and chemical resistances such as acid resistance, alkali resistance, acetone resistance, ethanol resistance and soap resistance are all excellent.

Example 2

The formula is shown in Table 2:

Table 2

Preparation:

(1) Mix other raw materials except the pearlescent pigment, stir and disperse, and obtain the connecting material of screen ink;

(2) Add pearlescent pigment, stir and disperse;

(3) Add a photoinitiator before printing, stir and disperse for 50 minutes to obtain the photocurable screen pearlescent ink suitable for different printing substrates, with a viscosity of 230mPa·s (25°C, flat plate, shear rate ^{300s- 1} ).

Tested by GBT 7707-2008 standard, it has good adhesion to PET, BOPP and other plastic substrates and paper. When printed by KBA-Giori's high-speed rotary screen printing machine, it has excellent printability and can print 10,000 sheets per hour. It can dry in time at high speed, the pearlescent effect of the printed matter is obvious, the lines are clear, and the physical and chemical resistances such as acid resistance, alkali resistance, acetone resistance, ethanol resistance and soap resistance are all excellent.

Claims (12)

1. The photocurable screen pearlescent ink suitable for different printing substrates is characterized in that it is prepared from components comprising the following weight percentages: The viscosity of the polyurethane acrylate resin at 60°C is greater than 5000cps; The acrylate prepolymer is selected from more than one of epoxy acrylate, polyester acrylate or polyether acrylate; The adhesion promoting resin is selected from more than one of acid-modified acrylate, chlorinated polyester acrylate or pure acrylate resin; The monomer is selected from 1,6 hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), trimethylolpropane triacrylate (TMPTA), dipropylene glycol diacrylate (DPGDA) , phenol ethyl acrylate (PEA), ethoxylated trimethylolpropane triacrylate (EOTMPTA), propoxylated trimethylolpropane triacrylate (POTMPTA) or 1,6-hexanedi One or more of alcohol methoxy monoacrylate (HDOMEMA). 2. the photocurable screen pearl ink suitable for different printing substrates according to claim 1 is characterized in that, it is prepared by adopting the following components in weight percent:

3. The photocurable screen pearlescent ink suitable for different printing substrates according to claim 2, characterized in that the viscosity of the ink is 0.1 to 1 Pa·s, and the test conditions are 25°C, flat plate, shear rate is 300s ^-1 . 4. the photocurable screen pearlescent ink suitable for different printing substrates according to claim 1, characterized in that, the pearlescent pigment is coated with titanium dioxide by mica, silicon dioxide, aluminum oxide or borosilicate flakes, Sandwich lamellae composed of ferric oxide. 5. The photocurable screen pearlescent ink suitable for different printing substrates according to claim 1, wherein the solvent is one or more of ester solvents, ether solvents or ether ester solvents. 6. the photocurable screen pearlescent ink suitable for different printing substrates according to claim 1, wherein the rheological additive is selected from one of polyethylene wax, polyamide wax or fumed silica above. 7. The photocurable screen pearlescent ink suitable for different printing substrates according to claim 1, wherein the wetting and dispersing agent is selected from polymer copolymers, fatty acids, aliphatic amides and modified polyethers . 8. The photocurable screen pearlescent ink suitable for different printing substrates according to claim 1, wherein the substrate wetting agent is selected from polyether modified silicone, fluorine modified polymer or hydrocarbon compound. 9. The photocurable screen pearl ink suitable for different printing substrates according to claim 1, wherein the defoamer is selected from organically modified polysiloxane, polyether siloxane copolymer, fluorine Silicone solutions or silicone-free organic polymers. 10. The photocurable screen pearl ink suitable for different printing substrates according to claim 1, wherein the leveling agent is selected from polyether modified polysiloxane, organic modified polysiloxane or Polydimethylsiloxane. 11. The photocurable screen pearlescent ink suitable for different printing substrates according to any one of claims 1 to 10, wherein the photoinitiator is benzophenone, α-hydroxy ketone, α-amine One or more of ketone, monoacylphosphine or diacylphosphine. 12. According to any one of claims 1 to 11, the preparation method of photocurable screen pearlescent ink suitable for different printing substrates is characterized in that it comprises the following steps: (1) Polyurethane acrylate, acrylate, polyester acrylate, polyether acrylate, adhesion promoting resin that can participate in curing, monomer, solvent, substrate wetting agent, rheology additive, defoamer and The leveling agent is mixed, stirred and dispersed to obtain the screen ink binder; (2) Add pearlescent pigment, stir and disperse; (3) Add a photoinitiator before printing, stir and disperse, and then the photocurable screen pearlescent ink suitable for different printing substrates can be obtained.