DE2165404C3 - Screen printing ink - Google Patents

Description

(CH ₃ ),

Si

(CH ₃ ),
O - Si - O

O - Si - O

= Si - (CH ₃ ),

(CH ₃ ),

where η is between 2 and 7, contains the following ratio of the components mentioned (in parts by weight):

Varnishes 100

Resin 75 to 125

Metal salts of higher carboxylic acids 2 to 125

Pigments 5 to 120

organic solvent 75 to 175

Polymethylspirocyclosiloxane 1 to 20

2. Paint according to claim 1, characterized in that it is also tetrahydronaphthalene, decahydronaphthalene, Methylcyclohexanol or mixtures thereof in an amount of 1 to 10 parts by weight per 100 parts by weight of varnishes.

3. Paint according to claim 1 and 2, characterized in that it contains an addition of pentaphthalene varnish, one of the polyethers of pentaerythritol modified with linseed oil and dissolved in this oil and represents phthalic acid, in an amount of 5 to 50 parts by weight per 100 parts by weight in the paint Contains existing varnishes.

4. Paint according to claim 1, 2 and 3, characterized in that it has a filler aluminum hydroxide or its mixture with barium sulfate in an amount of 1 to 50 parts by weight per 100 parts by weight Contains varnishes.

Screen printing inks that contain linseed oil varnish are known, which is a polymerized linseed oil, or Pentaphthalfimis, which is a vegetable oil (linseed oil, Rung oil or castor oil) modified and m this oil-dissolved polyether of pentaei-ythritol and phthalic acid represents, or glyptal varnish that modified one with vegetable oil (linseed, tung or castor oil) and in this oil dissolved polyether of glycerine and Represents phthalic acid, or a mixture of the x-named Varnishes; Resin, made from phenol formaldehyde in or said resins modified with rosin; Metal salts of higher carbonates with a number of carbon atoms greater than 6, pigments and solvents (see B e r e s i n, »Polygrafitscheskie materialy «, Moscow, 1960 - in Russian).

Screen printing inks are also known which are made from a solution of various resins, preferably of low molecular weight Polyamides, in volatile organic solvents and made up of pigments.

The familiar colors of the first type have a long drying time (20 to 30 minutes at 6O ⁰ C), so you can not use on printing presses. The colors mentioned also tend to form overmolecular structures during drying, which results in inferior prints with a brittle layer of ink.

In printing machines with an hourly output of less than 4000 prints, the known ones get clogged The second type of colors is the printing form. With high-speed printing machines, their hourly output is is over 4000 prints, however, inferior prints with a fragile ink layer are obtained.

The purpose of the present invention is to eliminate the disadvantages mentioned.

The invention is based on the object of developing a screen printing ink that has a high degree of homogeneity and elasticity, and also has the shape in the screen printing process of both large and not clogged even at low speeds.

This object is achieved in that a screen printing ink is proposed that contains the linseed oil varnish, which is a polymerized linseed oil, or Pentaphthalfimis, one with vegetable oil (linseed, Tung or castor oil) modified polyethers of pentaerythritol and phthalic acid dissolved in this oil represents, or glyptal varnish that modified one with vegetable oil (linseed, tung or castor oil) and represents polyethers of glycerol and phthalic acid dissolved in this oil, or a mixture of these Resins; Resin composed of phenol-formaldehyde resins or the aforesaid resins made with rosin are modified; Metal salts of higher carboxylic acids with a carbon number above 6, pigments and solvents. According to the invention, the paint also contains polymethylspirocyclosiloxane of the formula

60

(CH ₃ ), - (CH ₃ ),
, O - Si - O,

The invention relates to screen printing inks that are used when printing on polymeric materials, glass, Metal, regenerated cellulose (cellophane) etc. as well as for the surface coloring of the mentioned materials are applicable.

O —Si —O '

(CH ₃ ),

= Si- (CH ₃ ),

where η is between 2 and 7, and has the following ratio of the components mentioned (in parts by weight)

3 ^ 4

Varnishes 100 filler or a mixture of the same with barium sulfate

υ »-, _ ,,. ,,,, in an amount of 1 to 50 parts by weight per 100

^Add resin 75 to 25 parts by weight.

Metal salts of higher carboxylic acids 2 to 25 The paint according to the invention has a high adhesion

5 against a surface made of metal, glass,

Pigments 5 to 120 polymeric substances etc. Before printing or

Organic solvent 75 to 175 is intended to dye the surface of polyethylene and polypropylene products by treatment with a

Polymethylspirozyklosiloxan 1 to 20 gas flame, chemicals or by corona discharge

can be activated.

According to the invention, Polymethylspirozyklo- The dried paint layer is elastic, abrasion-resistant

siioxane to the color to ensure its homogeneity and and to be resistant to chemicals (including

To increase elasticity as well as the wettability of the surface-active substances), has a nice shine

Print carrier, z. B. of polyethylene, with the color and does not age under the action of ultraviolet

to improve. The introduction of the said silicon »5 rays.

Organic additives make it possible to create color compositions. The printing ink according to the invention is based on the following

nents produced in an optimal, quick drying manner.

The 50% solution of a resin which

wendeii. By using this paint, the one made from phenol-formaldehyde resins or those mentioned

Blockage of the screen printing form in high-speed * ° taken with rosin modified resins

Avoid printing machines whose hourly output is in one of the above organic lo-

is between 5000 and 6000 prints. solvents or in their mixtures. One gives

The paint according to the invention can contain other recipe ingredients than the above-mentioned resin solution

Resins contain high molecular weight compounds such as (apart from metal salts of higher carboxylic acids and poly-

z. B. with colophony modified diphenylol * 5 methylspirozyklosiloxan), it is loaded into one

propane-formaldehyde resin.Phenol-formaldehyde resin.Kre- Attritor, a bead or vibrating mill and crushed

sol formaldehyde resin. to a dispersity between 5 and 10 μΐη (the first

As metal salts of higher carboxylic acids, the mass).

Printing ink z. B. resinates, linoleates, calcium, metal salts of higher carboxylic acids manganese, lead, cobalt and aluminum naphthenates 3 ° and polymethylspirozyklosiloxane are mixed in the recipe, both as such and as a mixture. appropriate ratio and receives the second mass.

The pigments used are organic or inorganic. The two masses produced are added to GePigments as well as their mixtures in question. custom (before printing or dyeing products)

The organic solvents mentioned can be mixed with one another intimately and given a printing ink z. B. toluene, ethyl acetate, butyl acetate, 35 color. The masses mentioned can be compared to Ver-Cyclohexanone, Store ethylene glycol monoethyl ether, ethy- mics for a long time (over 1 year) without their contain lenglycol monobutyl ether and their mixtures. To change properties.

In order to prevent the clogging of the screen printing form with the If necessary, the produced color is used Ink is added when printing on high-speed printing solvents, and the ink is applied to the machines (3,000 to 5,000 prints per hour) are brought to operating viscosity. Is it also necessary to avoid it is advisable, according to the invention, to lend a color to extend the drying time of the color, given it to use the also tetrahydronaphthalene, Dekader het provided color, as indicated above, the hydronaphthalene, methylcyclohexanol or their Ge pentaphthalene varnish, one modified with linseed oil mix in an amount of 1 to 10 parts by weight per and in this oil dissolved polyether of pentaerythritol Contains 100 parts by weight of varnishes. 45 and phthalic acid represents.

The introduction of the compounds mentioned in the The method for the production of the color under color prevents the premature drying of the color differs a little from the above mentioned on the screen printing form during the printing process and practices if color grinding mills are used. In this case no effect on the Trocknungsgeschwindig- this case crushed material to the pigment and the Füllkeit color during the drying of prints 5 °, when it is provided in the paint formulation to-(at about 60 ⁰ C). together with varnishes in a color grinder on one

To clog the screen printing form with the required dispersity (5 to ΙΟμηι) and receives Color when printing on machines with a pigment paste. At the same time, the 50- bis Hourly output of 500 to 3000 prints or on 60% resin solution in one of the orga hand presses mentioned with an hourly output of 15 to 55 niche solvents or in their mixtures before-30 To avoid printing, it is advisable to inventively prepare. To make the first mass, mixed in accordance with the use of a color, which the pentaphthalene then said pigment paste with the resin varnish in an amount of 5 to 50 parts by weight per solution and such ingredients as Tetrahydro-100 Parts by weight of the varnishes contained in the paint naphthalene, decahydronaphthalene, methylcyclohexane added is, in turn, an oil modified with linseed oil or their mixtures, if they are dyed and polyethers of penta formulation dissolved in this oil are provided.

represents erythritol and phthalic acid. Metal salts of higher carboxylic acids and polymethyl

The said addition of varnish prevents the pre-spirocyclosiloxane from being mixed with one another,

early drying of the paint on the screen printing form and the second mass is obtained,

during the printing process on printing machines and by hand. The two masses obtained are given before use

press with a smaller pressure output. to each other, mixes intimately and receives a pressure

To see the sharpness of the print on the print substrate,

high, one can use the color aluminum hydroxide as For a better understanding of the present invention

the following examples for the preparation of the invention Through printing color listed.

example 1

29 kg of pentaphthalene varnish (a polyether modified with linseed oil and dissolved in this oil from Pentaerythritol and phthalic acid ^ 60 kg 50% solution of diphenylolpropane formaldehyde resin modified with colophony in a mixture of organic solvents, which consists of 13 kg Zykluhexanon, 8.5 kg Toluene and 8.5 kg of ethyl acetate, 17 kg of organic pigment red, 0.5 kg of tetrahydronaphthalene and 3.5 kg mixture of aluminum hydroxide and barium sulfate (in the aluminum hydroxide-barium sulfate weight ratio of 1: 2) mixed The mixture obtained was charged into the attritor and crushed to a dispersity of 5 to 10 μπι (the first mass ;.

The aforesaid pentaphthalene film was previously prepared in the following manner. 142 kg of pentaerythritol and 35 g of lead oxide were added to 750 kg of linseed oil, and the mixture was heated to between 250 and 260 ¹¹ C for 6 hours. Then 245 kg of phthalic anhydride, 0.5 kg, were added

HOOC. CH ₃

CH,

Triphenyl phosphite, 50 kg of xylene, heated the reaction mixture for 8 hours between 225 and 230 ° C and then carried out the vacuum distillation of xylene.

The above rosin modified diphenylpropane formaldehyde resin was previously prepared in the following manner. 240 g of diphenylolpropane, 50 kg of paraform, 200 kg of 36% formaldehyde solution and 1.5 kg of calcium hydroxide were charged into the reactor, the reaction material was heated to 40 ° C., after which the heating was stopped and the reaction material was between 40 and 50 ° C left for 4 hours. 1500 kg of molten rosin were then added to the reactor, from which terpenes were obtained by pre-distillation with steam. The temperature was increased to 170 to 180 ^° C., and the reaction mixture was left to stand at this temperature for 4 hours. Then 90 kg of glycerine were added and the temperature was increased

ao to 240 ° C. and left the reaction mixture to stand at this temperature for 2 to 2.5 hours. The high molecular weight compound (resin) produced has the following structural formula:

H ₃ C.

COOH

CH ₂
O

CH ₃

CH

CH.OH

CH ₃

c- <;

CH ₃ CH ₂
O

CH ₂ OH

H ₃ C

HC

CH ₃

CH ₃

CH ₃

In addition to the first mass mentioned above, the second mass was produced in such a way that one separate container 1.5 kg cobalt naphthenate, 1.5 kg mixture of calcium, manganese and lead linoleates (for their weight ratio of 1: 1: 1) and 3 kg of polymethylspirozyclosiloxane mingled.

The first and second mass were mixed before printing until a screen printing ink was obtained would. The full drying time of the screen printing ink was

at 18 to 2O ⁰ C for 40 to 60 minutes

at 6O ⁰ C for 2 to 4 minutes

at 90 ° C for 1 to 2 minutes

Using such a color, you can print on machines with an hourly output between 3000 and 6000 prints lies without the screen printing form being clogged with the ink.

The printing ink prepared in this way but without the addition of tetrahydronaphthalene had the following Full drying times on:

at 18 to 20 ⁰ C lö to 15 minutes

at 60 ° C for 2 to 4 minutes

at 90 ^° C. for 1 to 2 minutes

60

You can only print on high-speed printing machines using such a color, whose hourly output is between 5000 and 6000 prints.

In order to work on machines with an hourly output of 500 to 3000 prints as well as on hand presses with a Hourly output of 15 to 30 prints without clogging of the printing form with the color print can, the pentaphthalfimis were added to the paint produced, which modified one with linseed oil and is polyether of pentaerythritol and phthalic acid dissolved in this oil.

The influence of the addition of pentaphthalene varnish on the full drying time can be seen from the following table.

45

Pentaphthalene Full dry time the color, min amount of varnish, related to between Color weight 18 and 20 ° C at oU C % 150 to 180 8 to 10 2.5 300 to 360 14 to 15 5 600 to 720 22 to 23 7.5 900 to 1080 28 to 30 10

High quality prints and dyed products were made using the color produced receive. The dried color layer is elastic, does not age with long exposure to air and under the action of ultraviolet rays.

Example 2

There were 24 kg of Pentaphthalfimis, which was prepared as in Example 1, 7 kg of polymerized linseed oil with a low degree of polymerization, 60 kg 50% solution of diphenylolpropane formaldehyde resin modified with rosin, obtained, as described in Example 1, in a mixture of solvents consisting of 10 kg of cyclohexanone and 20 kg

Toluene, 4 kg inorganic pigment blue, 1.5 kg pentaerythritol and phthalic acid), 60 kg solution of Carbon black, 0.8 kg of organic pigment black, 6 kg of aluminum phenol formaldehyde resin (30 kg of resin and 30 kg of ethyminium hydroxide and 4 kg of barium sulfate mixed. lenglycol monobutyl ether), 0.4 kg tetrahydronaphtha-man charged the mixture into the bead mill and crushed, 10 kg of inorganic pigment blue and 2 kg of broken particles to a dispersity of 5 to 10 μm (the 5 minium hydroxide mixed. The barley was charged Dimensions). In a single vessel, 1.5 kg were mixed in a vibrating mill and crushed on one Cobalt naphthenate, 2 kg of lead sinate, 2 kg of manganese dispersity from 5 to 10 μm (the first mass). It was resinate and 3 kg polymethylspirocyclosiloxane separate from it a mixture consisting of 5 kg aluminum mix, and the second mass was obtained. minium oleate and 3 kg of polymethylspirocyclosiloxane

Both masses were mixed before use and io (the second mass) prepared.

added 5 kg of toluene, a finished man mixed both masses before use by

Ink received. a printing ink was obtained.

The properties of the manufactured paint are similar in terms of their properties to the manufactured one

those given in example 1. Color as described in Example 1.

24 kg of glyptal varnish (one with tung oil 15.
modified polyether from example 5 dissolved in this oil
Glycerine and phthalic acid) and 25 kg of titanium white. 15 kg of pentaphthalene varnish (one mixed with tung oil, after which they were comminuted in a color grinder on a modified polyether dissolved in this oil with a dispersity of 5 to 10 μm. Man pentaerythritol and phthalic acid) , 15 kg glyptal varnish then mixed the pigment paste obtained with 50 kg 20 (a solution of diphenylolpropane formaldehyde resin (25 kg polyether of glycerine and phthalic acid) modified with linseed oil and dissolved in this oil, 60 kg of solder resin and 25 kg of ethylene glycol monoethyl ether) and solution of cresol formaldehyde resin (30 kg resin, 20 kg 0.3 kg methylcyclohexanol (the first mass). There butyl acetate and 10 kg cyclohexanone), 2.5 kg deca was separated from a mixture consisting of 2 kg hydronaphthalene, 3 kg organic pigment yellow and lead resinate, 1 kg manganese linoleate, 1 kg calcium 25 10 kg aluminum hydroxide mixed. Linoleate and 2 kg of polymethylspirozyclosiloxane were charged (which prepared the mixture in an attritor and crushed to a second mass). Dispersity from 5 to 10 μm (the first mass). It

The two masses were mixed before use, a mixture consisting of 1.5 kg being separated

a finished printing ink was obtained. Lead sinate, 1.5 kg cobalt naphthenate and 3 kg poly-

In terms of its properties, the 30 methylspirozyclosiloxane (the second mass) produced is

Color as described in Example 1. placed.

. ■ \ α One mixed both compositions voi

Example 4 Use in Obtaining a Printing Ink Which

There were 31 kg of pentaphthalene varnish (a with castor oil according to its properties of the described in Example 1

modified polyether of 35 levels dissolved in this oil.

409651/31;

552

Claims (1)

Patent claims: 1; Screen printing inks containing linseed oil varnish, which is a polymerized linseed oil, or pentaphthalene varnish, one modified with linseed, tung or castor oil and dissolved in this oil Polyether of pentaerythritol and phthalic acid, or glyptal varnish, which is one with flax, tung or castor oil modified and used in this oil dissolved polyethers of glycerine and phthalic acid, or a mixture of the varnishes mentioned as well as a resin based on phenol-formaldehyde resins or those mentioned with rosin, modified resins, metal salts of higher carboxylic acids with a number of carbon atoms greater than 6, Pigments and organic solvents, characterized in that they also have polymethylspirozyclosiloxane of the formula