CN101974267B - Aqueous ultraviolet light curing pearlescent silk screen ink and preparation method thereof - Google Patents

Abstract

The invention provides an aqueous ultraviolet light curing pearlescent silk screen ink and a preparation method thereof, and the aqueous ultraviolet light curing pearlescent silk screen ink comprises the following components of 45 to 65wt% of polyurethane acrylate emulsion, 5 to 20wt% of pearlescent pigment, 0.5 to 2wt% of thickening agent, 0.5 to 1.5wt% of defoaming agent, 0.1 to 1.5wt% of flatting agent, 2 to 5wt% of film forming assistant, 0.5 to 3wt% of pH amine pH regulator, 2 to 5wt% of light initiating agent and the balance of water. The aqueous ultraviolet light curing pearlescent silk screen ink provided by the invention has the advantages of rapid drying, good chemical corrosion resistance performance, good storage stability and reemulsification performance, high drying speed, high acid and alkali resistance performance, good solvent resistance performance and the like, is environmental friendly, and can be especially suitable for high-speed rotation printing.

Description

UV-curable waterborne pearly-lustre silk-screen ink and preparation method

Technical field

The present invention relates to a kind of pearly-lustre silk-screen ink and preparation method thereof.

Background technology

In recent years, development along with industrial technology, it is very fast that screen printing technique is applied to the tempo in false proof field, it has some tangible advantages, printable fabric and various product that other mode of printings such as relief printing plate, intaglio plate, lithographic plate are difficult to print, all can realize printing, help demonstrating fully of antifalse effect by silk screen printing.For example surface printings such as flexible plastic film, paper and fabric some to pressure-sensitive photochromatic printing ink, temperature sensitive ink and magnetic ink or the like.

In silk screen printing, silk-screen ink is determining the key that can print quality and printing be carried out smoothly, and particularly on high speed rotary screen printing equipment, the performance of printing ink is more crucial.

The pearly-lustre printing is as a kind of mode of printing of special-effect, rely on its unique pearliness, make printed matter surface produce graceful unique, the soft pleasing reward effect of looking, has anti-characteristic of duplicating simultaneously, certain antifalse effect is arranged, in numerous mode of printings, take the course of its own, become popular a kind of decorating printing technology, obtained widespread use in fields such as banknote, security, packing and labels.

The solvent-borne type silk-screen ink is in manufacturing, printing and drying process, because a large amount of volatilizations of solvent, not only environment is polluted, also can endanger health of operators, there is hidden danger, its use more and more is restricted, so ultraviolet light polymerization silk-screen ink and watersoluble silk screen printing ink become the important development trend of silk-screen ink.Watersoluble silk screen printing ink needs long drying tunnel carry out drying in the high speed printing process, and ultraviolet light polymerization then can instantaneous solidification, but the monomeric environmental-protecting performance of its use is under suspicion.

Summary of the invention

Technical problem to be solved by this invention provides a kind of UV-curable waterborne pearly-lustre silk-screen ink and preparation method, to overcome the defective that prior art exists.

UV-curable waterborne pearly-lustre silk-screen ink of the present invention comprises following components in weight percentage:

Urethane acrylate emulsion 45～65%

Pearly pigment 5～20%

Thickening material 0.5～2%

Defoamer 0.5～1.5%

Flow agent 0.1～1.5%

Film coalescence aid 2～5%

Amine pH value conditioning agent 0.5～3%

Light trigger 2～5%

Water surplus

Preferably, described UV-curable waterborne pearly-lustre silk-screen ink comprises following components in weight percentage:

Urethane acrylate emulsion 50～60%

Pearly pigment 10～18%

Thickening material 1～2%

Defoamer 0.5～1%

Flow agent 0.2～1%

Film coalescence aid 3～4%

Amine pH value conditioning agent 0.5～3%

Light trigger 2～5%

Water surplus

The weight solid content of described urethane acrylate emulsion is about 30～55%, and pH is 7.0～8.5, can adopt the commercially available prod, is the product of UCECOAT 7660 as the cyanogen secret service industry company trade mark;

Described pearly pigment can adopt the commercially available prod, is the product of Lumina 9T30D as BASF AG's trade mark;

Described thickening material be a kind of in alkali swelling type acrylate copolymer, polyurethanes, the cellulose family water-based thickener and more than; Can adopt the commercially available prod, be the product of Borchi Gel PW25 as the OMG company trade mark;

Described defoamer is polyether modified siloxane, silicone based, mineral oils or plant oil, can adopt the commercially available prod, is the product of TEGO Foamex 843 as winning the wound Di Gao chemical company trade mark;

Described flow agent is a polyacrylic ester, polysiloxane-based, can adopt the fluorine-carbon modified polyacrylic ester of Ciba company, and the trade mark is the product of EFKA 3570, or the organic modified polyorganosiloxane class of the modest company of moral, and the trade mark is the product of Levaslip 468;

Described film coalescence aid is ethylene glycol, propylene glycol, propylene-glycol ethyl ether or butyl glycol ether etc.;

Amine pH value conditioning agent comprise a kind of in triethylamine, dimethylethanolamine, 2-amino-2-methyl-1-propanol, the Yi Bingchunan and more than;

Described light trigger be a kind of in the aqueous dispersions of alpha-alcohol ketone, bisacylphosphine oxide or the mixture that contains acylphosphanes and more than, can adopt the commercially available prod, be products such as Irgacure1173, Irgacure 2959, Irgacure 819DW or Irgacure 2022 as BASF AG's trade mark;

The described mixture that contains acylphosphanes is the mixture of a kind of bisacylphosphine oxide and monoacyl phosphine oxide;

Further, also comprise sterilization inhibitor and/or base material wetting agent, described sterilization inhibitor is selected from the organic class antiseptic-germicide that carries the mineral-type antiseptic-germicide of the germ resistance metallics of having held silver, titanium, copper, gold etc. and contain parabens, N-fluoro dichloromethyl sulfo-phthalic imidine etc. in zeolite and pottery, can adopt the commercially available prod, be the product of IRGAGUARD H 6000 as BASF AG's trade mark; The base material wetting agent is selected from fluorochemical surfactant, polyether modified siloxane, alkoxyl group tensio-active agent or organic silicon surfactant, can adopt the commercially available prod, is the product of TEGO Wet 260 as winning the wound Di Gao chemical company trade mark;

The consumption of sterilization inhibitor is a benchmark with the weight of described UV-curable waterborne pearly-lustre silk-screen ink, is 0.5～1%, and the base material wetting agent is 0.1～1%.

Preparation method of the present invention comprises the steps:

(a) at first urethane acrylate emulsion, water, thickening material and defoamer are mixed, dispersed with stirring is made pre-emulsion; (b) add pearly pigment, flow agent, film coalescence aid and amine pH value conditioning agent, dispersed with stirring; (c) add light trigger before the printing, dispersed with stirring obtains described UV-curable waterborne pearly-lustre silk-screen ink.

UV-curable waterborne pearly-lustre silk-screen ink of the present invention, have dry rapidly, resistance to chemical corrosion is good and the advantage of environmental protection, have stability in storage and reemulsification performance preferably, and advantages such as rate of drying is fast, acid-fast alkali-proof performance height, solvent resistance are good, environmental protection, especially be fit to the high speed rotary printing and use.

Embodiment

Embodiment 1

Prescription sees the following form, and amounts of components all is weight percentage.

Amine pH value conditioning agent is a dimethylethanolamine;

Film coalescence aid is a butyl glycol ether;

Defoamer is TEGO Foamex 843;

Flow agent is Ciba EFKA 3570;

The preparation method:

At first urethane acrylate emulsion, water, polyurethanes thickening material and defoamer dispersed with stirring are made pre-emulsion, add pearly pigment, flow agent, film coalescence aid and dimethylethanolamine again and regulate the pH value, dispersed with stirring, add Irgacure 819DW light trigger before using, dispersed with stirring can be used.

Prepare the pearly-lustre silk-screen ink, have preferably stability, place and do not have obvious sedimentation in 15 days, viscosity be 260mPas (25 ℃, ARES G2 rheometer, flat board, shearing rate is 300s ^-1), when adopting the Nota Screen II type high speed rotary silk screen printing machine printing of KBA-Giori company, printing ink reemulsification excellent property, clean easily, can be in time dry under 10000/hour the print speed, the printing pearl effect obviously, svelteness, materialization patience such as acidproof, alkaline-resisting, anti-acetone, anti-ethanol, anti-soap are excellent, can with flexographic ink and gravure ink is better during as shading combine.

Embodiment 2

Ink sample prepares according to the composition in the following table:

Amine pH value conditioning agent is a triethylamine;

Film coalescence aid is a butyl glycol ether;

Defoamer is BYK-028;

Flow agent is the Levaslip 468 of the modest company of moral;

The preparation method:

At first urethane acrylate emulsion, water, film coalescence aid dispersed with stirring are made pre-emulsion, add polyurethanes thickening material, defoamer, flow agent and pH regulator agent triethylamine dispersed with stirring again and evenly make ink emulsion, adding pearly pigment afterwards stirs, add light trigger Irgacure1173 before using, after stirring, can use.

Prepare the pearly-lustre silk-screen ink, have preferably stability, placed no obvious sedimentation in 15 days, viscosity be 180mPas (25 ℃, ARES G2 rheometer, flat board, shearing rate is 300s ^-1), on the Nota of KBA-Giori company Screen II type high speed rotary silk screen printing machine, print, printing ink reemulsification excellent property, easy cleaning, can be in time dry under 8000/hour the print speed, the printing pearl effect obviously, svelteness, materialization patience such as acidproof, alkaline-resisting, anti-acetone, anti-ethanol, anti-soap are excellent, during as shading with flexographic ink and gravure ink to combine fastness also better.

Claims (8)

1. UV-curable waterborne pearly-lustre silk-screen ink is characterized in that, comprises following components in weight percentage:

Described thickening material is more than one in alkali swelling type acrylate copolymer, polyurethanes, the cellulose family water-based thickener;

Described film coalescence aid is ethylene glycol, propylene glycol, propylene-glycol ethyl ether or butyl glycol ether;

Described amine pH value conditioning agent be a kind of in triethylamine, dimethylethanolamine, 2-amino-2-methyl-1-propanol, the Yi Bingchunan and more than.

2. UV-curable waterborne pearly-lustre silk-screen ink according to claim 1 is characterized in that, comprises following components in weight percentage:

3. UV-curable waterborne pearly-lustre silk-screen ink according to claim 1 and 2 is characterized in that the weight solid content of described urethane acrylate emulsion is 30～55%.

4. UV-curable waterborne pearly-lustre silk-screen ink according to claim 1 and 2 is characterized in that, described defoamer is polyether modified siloxane, silicone based, mineral oils or plant oil.

5. UV-curable waterborne pearly-lustre silk-screen ink according to claim 1 and 2 is characterized in that described flow agent is a polyacrylic ester, polysiloxane-based.

6. UV-curable waterborne pearly-lustre silk-screen ink according to claim 1 and 2 is characterized in that, described light trigger be a kind of in the aqueous dispersions of alpha-alcohol ketone, bisacylphosphine oxide or the mixture that contains acylphosphanes and more than.

7. UV-curable waterborne pearly-lustre silk-screen ink according to claim 1 and 2 is characterized in that, also comprises sterilization inhibitor and/or base material wetting agent.

8. according to the preparation method of each described UV-curable waterborne pearly-lustre silk-screen ink of claim 1～6, it is characterized in that, comprise the steps:

(a) at first urethane acrylate emulsion, water, thickening material and defoamer are mixed, dispersed with stirring is made pre-emulsion; (b) add pearly pigment, flow agent, film coalescence aid and amine pH value conditioning agent, dispersed with stirring; (c) add light trigger before the printing, dispersed with stirring obtains described UV-curable waterborne pearly-lustre silk-screen ink.