SU1700031A1 - Uv-curing offset printing ink - Google Patents

Abstract

The invention relates to the printing industry, in particular, to inks used for marking the offset cases of electronic equipment made of aluminum, tin alloys, polyethylene, polypropylene, heat-shrinkable tubes, polyethylene terephthalate adhesive tape, compounds, as well as foil-coated dielectrics by the method of offset ns. and products coated with various paints and varnishes. The ink can also be used for offset printing on paper, cardboard and other materials used in publishing printing. The invention makes it possible to reduce the degree of paint emulsification from 45 to 17-20%, to increase the resistance to the action of the alcohol-benzine mixture from 5 to 80-100 cycles, salt fog from 7 to 10-18 days, and mold fungi from A to 1- 2 points, increase adhesion to metals from 2.8 to 5.5-6.5 MPa, to polymeric materials from 2.8 to 4-5.5 MPa due to the use of a composition containing, in wt.%: Pigment 12-35 ; oligoether acrylate 45-70; trichlorodiphenyl 5-15; epoxydiane resin, modified diphenylketone, mol.m. 400-500 and the content of epoxy groups 15% 5-20. 2 tab. sl Oh

Description

The invention relates to the printing industry, in particular to printing inks used for marking by offset printing the housings of electronic products made of aluminum, tin alloys, polyethylene, polypropylene, heat shrinkable tube, polyethylene terephthalate adhesive tape, compounds, as well as folded dielectrics and products covered with various paints

materials, in addition, the ink can be used for offset printing on paper, cardboard and other materials used in the publishing printing.

UV printing inks based on a photopolymerizable composition, including cyanoethyl methacrylate, trichlorobiphenyl, pigment and oligoether acrylate (jJ.

This paint is distinguished by a high cure rate under UV irradiation (), but it cannot be used as marking for electronic products due to the following disadvantages: low performance properties - insufficient resistance to alcohol and gasoline mixture (no more than 5 cycles), salt fog (less than 10 days) mold fungi (more than 2 points), high humidity (less than 56 days); a high degree of BI emulsification in the printing process — lower storage stability 1, 5-2 months.

The purpose of the invention is to increase the resistance of the paint to the physicochemical effects and adhesion of it to metals and polymeric materials, as well as to reduce the degree of emulsification, to increase the stability of the paint during storage.

This goal is achieved by the fact that offset printing ink UV-1-convolution, containing pigment, oligomethyl acrylate and trichlorodiphenyl, additionally contains an epoxy-dian resin modified with diphenylketone, mol%. 400-500 and the content of epoxy groups is 15% with the following ratio of components, mas:

Pigment

Oligoethylacrylate

Trichlorodiphenyl

Epoxy-diane resin, modified

diphenyl ketone,

with mol.m. 400,500 and epoxy content

groups -15%

As an oligoester acrylate, the dye contains triacrylate pentaerythritol Rita, triacrylate trimethylolpropane, dimethacrylate triethylene glycol phthalate MGF-9PS or cyanoethyl methacrylate, or their mixture.

Paint as a pigment contains any organic and inorganic pigments, for example, phthalocyanine, benzidine, carbon black, titanium dioxide, etc.

Epoxy-diane resin, modified diphenyl ketone, mol.m.

12-35

45-70

5-15

5-20

0

five

0

five

0

five

0

five

0

five

400-500 and an epoxy group content of 15% is obtained in a thermostatted vessel equipped with a mechanical stirrer, for which. it is loaded ma.ch. Dianova epoxy resin mol.m. 390-1100, heated to 1 00-120 ° C and at this temperature and the mixer turned on, 1 wt. diphenyl ketone. The process is carried out with continuous mixing of the components for 45-60 minutes until a clear, uniform liquid is obtained. The product is cooled. Its physicochemical characteristics (determined at 25 ° C): dynamic viscosity 0.5 - 1S5 Pa-s; a density of 1.14 / -1.170 g / cm3; the refractive index is 1,576-1,594; epoxy content of 15%; no hydroxyl groups; average mol.m. 400-500.

The paint of the proposed composition (Table 1) is prepared as follows.

Oligoether acrylate, epoxydiane resin, modified diphenylketone, mol.m. 400-500 and an epoxy content of 15%, trichlorobiphenyl and pigment are loaded into a kneader, where all components are thoroughly mixed for 20-40 minutes until a homogeneous batch is obtained. Then, the kneading is ground on a three-roll paintbrush machine until a homogeneous mass with a milling degree of 10-15 µm is obtained.

The obtained marking paint is applied by offset printing on parts of electronic products made of aluminum, tin alloys, polyethylene, polypropylene, heat shrinkable tube, adhesive tape based on polyethylene terephthalate, compounds, foil dielectrics, and also painted on with various paint and varnish materials by surface materials. The thickness of the ink layer in this case is 1.0-1.5 µm.

Marking markings harden under a DRT-1000 mercury-quartz lamp for 5 s at a distance of 25 cm from the lamp. The surface irradiance of the impression is 30 W / cm 2.

The stability of the ink during storage under natural conditions is determined by the change in spreading over time. Stability is characterized by time.

from the time the paint was made to the appearance of signs of its polymerization and a decrease in flow by 5 mm. (

• Resistance to alcohol and gasoline mixture, salt mist, mold fungi and increased humidity are also determined.

I In addition, the degree of emulsification of a paint with water is determined according to max, the maximum amount of absorbed paint of water during their intensive mixing during the preparation of the emulsion. The amount of absorbed water is determined by the weight (volume) method and is expressed as a percentage of the weight of the test paint.

The test results are shown in table 2.

Claims (1)

Invention Formula Offset UV inking ink containing pigment, oligoester acrylate and trichlorobiphenyl, characterized in that In order to increase the durability of the paint to physicochemical effects and its adhesion to metals and polymeric materials, as well as to reduce the degree of emulsification, increase the stability of the paint during storage, it additionally contains an epoxy diane resin modified by diphenyl ketone with a molecular weight of 400-500 and epoxy groups of 15% in the following ratio of components, mas: five 0 five Oig.oether acrylate pigment Trichlorodiphenyl Epoxydian resin, modified with diphenyl ketone, with mol.m. TSOO- 500 and content of epoxy groups 15% 12-35 1 "5-70 5-15 5-20 Oligoethylacrylate 7-20 Olix TACH-ester-acrylate Triacry at pentaerythritol Trimethylolpropane triacrylate - Cyanethyl acrylate Trichpordiphenyl Pigment blue fta scientaine Technical carbon P-23 Pigment bright red 4g Titanium dioxide Р-02; Eroxidian modified diphenyl ketone, with iol.i. ((CO-BOO and content epoxy groups 15 Examples 6 and 7 control, example 8 - known. Table 1 "9 one. 70 20 19 10 sixteen 7С 4 four 22 five U 1610 1716 12 35 13 22 Table 2