Ink for offset printing on non-absorbent surfaces

 

(57) Abstract:

Purpose: printing ink for offset printing on non-absorbent surfaces - metal foil, steel and so on, One of the main applications is the creation of a protective image technologies for printed circuit boards in the electronics industry. The inventive printing ink contains, wt%: pigment 16 - 25; pentaftalevyh polyester (RL) 25 20 - 2; disperser (DP) 1 - 1 - 2; Alcide D 1600 5 - 10; Alcide D 4100 5 - 10; oil fraction with so Kip. 350 - 380C 6 - 18; micronized wax 0.5 to 1.5; deflocculant DF-2 0,4 - 0,6; linseed oil 10 - 13; petroleum solvent RPK 280 - 8 - 23. The paint has a lower viscosity utterly destroyed structure, less continuity to thixotropy, greater opacity. Increases resistance to solutions of ferric chloride is reduced to solutions of alkali. table 2.

The invention relates to the printing industry, in particular to the ink for printing offset on non-absorbent surfaces of the metal foil, glass, porcelain and so on, One of the areas of application of the ink composition for intermediate protective image technology for printed circuit boards for radiobeta at a thickness of 2 microns should provide resistance to the etching solution on the basis of ferric chloride for 10 min at 40-60 taboutS; print must be completely removed 5% alkali solution within a fairly short time. An additional requirement is the high optical density of the ink (preferably dark tones) for visual quality control of the printed image.

Known printing ink for high or offset printing, containing (wt. h): pigment 180-200, polycondensate rosin and maleic anhydride-modified linseed oil in carbon oil fraction-520-680, polycondensate phthalic anhydride and pentaerythritol-modified linseed oil (alkyd resin D-1600) 25-45, polycondensate isophthalic acid and pentaerythritol-modified sunflower oil (alkyd resin D-4100) 15-45, monobasic fatty acid with the number of carbon atoms 12-18, 15-20, monohydroxy alcohol with the number of carbon atoms 3-8, 4-12, a petroleum fraction with TKip.350-380aboutWith 60-120, disodium salt ethylenediaminetetraacetic acid 10-20, polyethylene wax or ceresin 10-20, desiccant 10-15.

However, this paint is characterized by insufficiently high speed fixing (drying) on the printed surface, the lack of stability of the fixed print to aggressive environments, cha is ka for high or offset printing, containing (wt.h.): pigment 180-200; polycondensate rosin and maleic anhydride-modified linseed oil, 520-680; polycondensate phthalic anhydride and pentaerythritol-modified linseed oil, 19-32; polycondensate isophthalic acid and pentaerythritol-modified sunflower oil, 15-45; dispersant 10-20; oil fraction with so Kip. 350-380aboutWith 60-120; disodium salt of ethylenediaminetetraacetic acid 10-20; polyethylene wax or ceresin 10-20; ethoxylated derivatives of 12-hydroxy carboxylic acid (12-ACS) with the number 18 carbon atoms and the degree of oksietilirovannye 4-12, 4-8; amorphous gidrofobizirovannym Aerosil 2-4; desiccant 10-15.

The disadvantages of the paint are its low fluidity, leading to unstable transfer of the ink to form non-absorbent surface, resulting in a colorful film on the sheet loses continuity, and poor resistance of prints to the acidic solution of iron chloride.

We offer ink for offset printing on non-absorbent surfaces contains the following components, wt. including Pigment 16-32 Pentaftalevyh resin (RL-25) 20-24 Dispersant PD-1 (TU 6-14-19-215-87) 1-2 Polycondensate phthalic anhydride and pentaerythritol, modifitsirovannym oil (alkyl 4100) 6-10 Oil fraction with so Kip. 350-380about(MP-3) 12-14 Micronized wax (TU 6-05-1516-77) 0.5 to 1.5 Deflocculant DF-2 (TU 6-14-19-216-87) of 0.4-0.6 Linseed oil 10-12 Petroleum solvent (RPK-280, TU 38.10-16-13-84) 15-23 Desiccant (mixed) of 0.5-1.5

Dispersant PD-1 is a product based on ethoxylated derivatives of 12-hydroxycarbonic acid (TU 6-14-19-215-87).

Mixed desiccant is a mixture of cobalt naphthenate and lead naphthenate.

Deflocculant DF-2 is a salt of monosulfonated phthalocyanine copper and Quaternary ammonium bases (TU 6-14-19-216-87).

The paint is prepared by mixing the starting components in a kneader machine, and then dispersed on a three-roll kratkotrajni car to a buyer on grindometer less than 10 microns. The inks and their properties are presented in table. 1 and 2.

INK FOR OFFSET PRINTING ON NON-absorbent SURFACES containing pigment, polycondensate phthalic anhydride and pentaerythritol-modified linseed oil, polycondensate isophthalic acid and pentaerythritol-modified sunflower oil, a petroleum fraction with a boiling point of 350 380oWith, dispersant, wax and drying, characterized in that as a dispersant she is oneiromancy wax and optionally salt monocularity phthalocyanine copper and Quaternary ammonium bases as deflocculant, pentaftalevyh resin, linseed oil and petroleum solvent with a boiling point 280oWith the following ratio of components, wt.h.

Pigment 16 25

Polycondensate phthalic anhydride and pentaerythritol-modified linseed oil 6 10

Polycondensate isophthalic acid and pentaerythritol-modified sunflower oil 6 10

Oil fraction with a boiling point of 350 380o12 14

Product based on ethoxylated derivatives of 12-hydroxycarbonic acid (dispersant PD-1) 1 2

Micronized wax 0,5 1,5

Salt monocularity phthalocyanine copper and Quaternary ammonium bases 0,4 0,6

Pentaftalevyh resin 20 24

Linseed oil 10 13

Petroleum solvent with a boiling point 280o8 23

Desiccant 0,5 1,5

 

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