DE1948529C3 - Preparation containing a watery solution of colloidal silica, an organic solvent and phosphoric acid - Google Patents

Description

e) 40 to 75 percent by weight of organic solvent ....

solvent from the group methanol, Etna- ^6Π τ ^? V ο. ju »·« ·. · L · j · \ / j

nol isopropanol and AceL and. ^The _f . ^Erfi " ^du . ^N S. ^{Concerns further} _R ^hl " ^d ^. use

f) 58.2 to 3 percent by weight of water ⁴⁵ ^ Ύ ^E "a ^Z " ^b / ^rel , ^un f ^{n zum} B ^e J ^andeln , ^{der Ober} "

to flatten the metal rollers of offset machines

considered. to prevent this from being caused by adhering oil pressure

4. Use of preparations after a paint stain.

of claims 1 to 3 for the treatment of the rollers As polyacrylic acid constituents according to the invention

from offset machines to the adhesion of oil 50 preparations are preferably water-soluble

avoid printing ink. Acrylic acid polymers with a molecular weight

used by approximately 150,000. The colloidal silica is said to be used in acidic conditions

Remain colloidal and have a solid content

55 of about 20 ° / ₀ have.

As titanium chelate compounds are used for

The invention relates to a preparation with a purpose of the invention, preferably water or

Content of an aqueous solution of colloidal silica alcohol-soluble compounds used, in particular

earth, an organic solvent and phosphorus earth, for example diisopropoxy-bis- (acetylaceto-

acid and its use for the treatment of 60 nato) -titanium, diisopropoxy-bis- (l-carbomethoxy-2-pro

Rollers of offset machines to prevent the adhesion of pano) titanium, titanium bis (acetylacetonato) diphenolate,

Avoid oil ink. Titanium bis (acetylacetonato) di-o-hydroxyphenolate and

Preparations containing the aforementioned titanium bis (äthyllactato) diphenolal.

sland parts and as a dispersion in the aqueous phase are also preferred are the following organotitanium

contain a petroleum ether fraction are from the USA - 65 compounds: tetramethyltitanium, tetraethyltitanium, te-

Pjitentschrift 2 780 168 known and are known in the traphenyititan, tetramethoxytitan, tetraethoxytitan,

Printing technology used to produce oil and fat Tetra-n-propoxytitanium, tetra-iso-propoxytitanium, tetra-

stains from planographic printing matrices or plates to butoxytitanium and bis-tcyclopentadienyO-titanium diaryl.

The solvent used for the organic titanium compounds is expediently organic Low boiling point solvents such as methyl alcohol, isopropyl alcohol, or acetone.

The above-mentioned components of the preparations have the following functions in particular: The polyacrylic acid is used to apply the preparation to the roller surface and to form a film. The organic titanium compound changes the behavior of the roller surface from hydrophobic (oleophilic) to hydrophilic (oleophobic) and improves the adhesion of the film to the roller surface. The colloidal silica regulates the adhesive strength of the film and makes it easier to remove the stuck-on printing ink. The phosphoric acid acts as a corrosion inhibitor.

By applying a preparation according to the invention, a A film will be produced that will allow printing ink to stick prevented.

According to a particularly preferred embodiment, preparations according to the invention have the following Composition on:

Mixing solutions (A ₁ ) and (B ₁ ) gives a preparation according to the invention which is applied to the surface of an offset press roller made of a corrosion-resistant aluminum alloy and allowed to dry for 5 minutes at room temperature. The roller treated in this way is not stained by printing ink containing oil, so that even if one prints with a matrix that is smaller than the roller and does not completely cover it, clear or clean prints are obtained. Oil ink made by dispersing dye or pigment in a drying oil is used for this test.

B e i s ρ i e 1 2

_{An aqueous solution (A 2} ) with the following composition is prepared from the same starting materials as in Example 1:

Parts by weight

Polyacrylic acid 5

Colloidal silica 1

Orthophosphoric acid 10

Water 14.8

component

Polyacrylic acid
(Molecular weight approx
150,000, solids content 25%). Colloidal silica

(Solids content 20 ¹ V ₀ )

phosphoric acid

Organic titanium compound
Organic solvent
water

Amount of parts by weight Furthermore, a second solution (B ₂ ) is prepared from the following components:

Parts by weight

Titanium bis (ethyl lactato) diphenolate 0.2

0.2 - 5 30 methyl alcohol 40

Acetone 30

0.5

0.1

40

58.2

5 10

2 75

A total of ... | 100 By mixing the solutions (A ₂ ) and (B ₂ ), a second preparation according to the invention is obtained with which the surface of a roller made of cast iron is treated analogously to Example 1.

The roller treated in this way gives the same test print results as in Example 1.

The formulations of the invention are most effective on cast iron or anodic rolls oxidized aluminum. They are applied to the roller surface before the die is placed on it is attached, or it is used to treat the part of the surface of the roller that is not with the die is covered.

The examples illustrate the invention.

example 1

An aqueous solution (A ₁ ) is prepared from the following components:

Parts by weight of polyacrylic acid

(Molecular weight 150,000

Solids content 25%) 1

Colloidal silica

(Solids content 20%) I.

Orthophosphoric acid 5

Water 22.5

Furthermore, a second solution (B ₁ ) is prepared from the following components:

Example 3

_{An aqueous solution (A 3} ) with the following composition is prepared from the same starting materials as in Example 1:

Weight lines

Polyacrylic acid 2

Colloidal silica 1

Orthophosphoric acid 3

Water 18-

Furthermore, a second solution (B.,) is prepared from the following components:

Weight lines

Tetra-iso-propoxytitanium 1

Isopropyl alcohol 3.5

Methyl alcohol 40

By mixing the solutions (A ₃ ) and (B _{: 1} ), a third preparation according to the invention is obtained with which the surface of a roller made of an aluminum alloy is treated analogously to Example I. The roller treated in this way has the same properties as those tested in Example 1.

Parts by weight of diisopropoxy-bis- (acetylacetonato) -

titanium 0.5

Isopropyl alcohol 70

Example 4

From the same starting materials as in Example 1, an aqueous solution (A ₁ ) is made with the following

Composition made:

Parts by weight

Polyacrylic acid 2

Colloidal silica 1

Orthophosphoric acid 5

Water 16.5

_{A second solution (B 4} ) is also prepared from the following components:

Parts by weight

Tetrabutoxytitanium 0.5

Isopropyl alcohol · .. 35

Methyl alcohol 40

Mixing the solutions (A ₄ ) and (B ₄ ) gives a further preparation according to the invention, which is tested for its properties analogously to Example 2 and provides the same test results as the preparation of Example 2.

Claims (3)

Remove 1 2 so that the cleaned areas no longer accept fat patent printing ink. For a similar purpose, namely to 1. Preparation with a content of an act of herwäßiges by electrophotographic route Solution of colloidal silica, one of the 5 clichés made for lithography, in particular organic solvents and phosphoric acid. offset printing, around their non-printing areas characterized in that they make a water-wettable are from the USA.-Mixture from patent specification 3 211686 aqueous solutions known, _λ . .. "■ ...,. Oj ₁ I the polyacrylic acid, sodium or potassium ferro- or a) an aqueous solution which, in addition to the colo-> _{one buffer} substance, contains the local silica and phosphoric acid _p . . _{ß Jh from about 30 to} still contains polyacrylic acid, and ^H ", _. b) a solution of an organic Titanverbin- ^el ^ '^"a" _{the jn def lithography! ins} . dung, n the organic solvent _Customized e _re frequently occurs in offset printing, namely contains. 15 especially when printing with matrices, 2. Preparation according to claim 1, characterized in that the smaller a denotes the rollers or cylinders of that they are furnace machines used as organic titanium and these are not bond a titanium chelate compound, especially complete printing, is the adhesion of OJ-diisopropoxybis (acetylacetonato) -titanium, Diiso printing ink on the roller surfaces, which is often propoxy-bis- (l-carbomethoxy-2-propano) -titanium. 10 is the cause of waste printing. This problem Titanium bis (acetylacetonato) diphenolate, titanium bis could not yet be solved. The inven- (acetyllactonato) -di-o-hydroxyphenoiate and / or manure is therefore based on the object of creating an agent titanium bis (ethyl lacto) diphenolate and / or one with the help of which this problem can be solved Organotitanium compound, in particular tetrame, can be dissolved. ethyl, tetraethyl, tetraphenyl, tetramethoxy, 25 It has now surprisingly been found that Tetraethoxy-, tetra-n-propoxy-, tetra-iso-propoxy- the adhesion of oil printing ink to the surface and tetrabutoxytitanium as well as bis (cyclopentadienyl) - which prevents the rollers of offset machines contains titanium diaryl. can be that one of the rollers with a feed 3. Preparation according to claim 1 or 2, the preparation being pretreated, which is an essential component characterized in that it consists of 3 ° parts water, polyacrylic acid, colloidal silica. \ η ·> L- c / - · n ■ ~ n- phosphoric acid, an organic titanium compound and a) 0 2 to 5 percent by weight of an aqueous. £ _{Titanverbindu ^] ösendes organ} Steam solu- Contains a solution of a polyacrylic acid with a _{molar medium} . , * ^g ? u ^ht , ^VOn , fr? l ^0C00 ' ^dere ü ^FeSt ' The subject of the invention is thus a preparation substance content is about 25 percent by weight, ^ß _dm designated type, which thereby b) 1 to 5 percent by weight of an aqueous Lo- _k J _{nn;: ei} . _chne * _is , ^g _{that they are} a mixture
solution of colloidal silica with a silica . soil content of about 20 percent by weight, a) an aqueous solution which, in addition to the collo- c) 0.5 to 10 percent by weight orthophosphoroidal silica and phosphoric acid acid, polyacrylic acid, and d) 0.1 to 2 percent by weight of organic titanium ⁴ ° b) a solution of an organic titanium compound, manure in the organic solvent