DE2640047A1 - PAINTS AND VARNISHES WITH INCREASED OPACITY AND ULTRA-ASH DRYING AND METHOD FOR MANUFACTURING THE SAME - Google Patents

Description

Paints and varnishes with increased opacity and ultra-fast drying and processes for producing the same

The invention relates to cold-crosslinkable paints and varnishes with ultra-fast drying and increased Opacity as well as a process for the production of the same, whereby under "paints and varnishes" also Helio- and flexographic inks and the like are to be understood.

The previously known coatings, paints or varnishes that are industrially applied on the assembly line, requiring 30 to 45 minutes when baked at temperatures around 18O ⁰ C to achieve the desired hardness and adhesion to various documents which ia general, especially if it concerns metals, have a primer layer (wash primer), on which the lacquer, color or varnish layers are applied, whose optimal adhesion is guaranteed by this primer layer. In general, glycerophthalate lacquers are used, the thermosetting resins in solution

F 013 / CAS 4 RFA

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Medium environment> often in connection with more or less oxidizable oils, which extend the drying time and do not allow quick handling of the parts coated with these paints and lacquers.

Also called one knows. Cellulose paints or varnishes "the dry, although faster, have (However, numerous shortcomings which have the opportunities for their use, particularly because of their lack of Schmiegsaakeit, poor adhesion to some documents, such as metals (especially if they do not undergo pre-treatment ) and their moderate resistance to chemicals.

The aim of the invention is therefore paints and varnishes with increased covering power and ultra-fast drying, which meet the requirements of practice better than the paints and varnishes known for a long time, in particular in such a way that they dry very quickly without the need for a baking treatment and excellent mechanical properties, such as pliability, adhesion and impact resistance and chemical resistance, in contrast to paints which are baked to give off toxic fumes are non- toxic and have such adhesive properties that they can be applied to metal surfaces without the latter must be provided with a primer, etc.

The inks of the invention and coatings with increased hiding power and ultra rapid drying are characterized in that they are formed essentially by the association of suitable organic or mineral pigments, which are soluble or dispersible in appropriate solvents with a binder, if necessary, hydroxyl groups yernetz -

709812/0987

"bare nitrocellulose and a crosslinking agent such as a aliphatic or aromatic organic polyisocyanate, dissolved in suitable organic solvents, contains and is itself optionally combined with resins from the group, in particular optionally hydroxylated or hydroxyl-containing homo- or copolymeric acrylic resins, polyurethane resins, polyester resins, esters of colophony-modified ones Polyesters, derivatives of phthalic anhydride-modified Polyesters, butyl urethanes, alkyd resins, homo- or copolymer vinyl resins, abietin resins, chlorinated resins, terpene derivatives, petroleum resins, coumarone-indene resins, Ketone resins, chlorinated rubbers soluble in the esters, phenol-formaldehyde resins, maleic resins includes individually or in mixture.

According to an advantageous embodiment, the paints and varnishes according to the invention contain a surface-active one Agents such as, in particular, an acetobutyrate of cellulose or sucrose.

According to a further advantageous embodiment, the paints and varnishes according to the invention contain one Product that facilitates its spread during application and the formation of bubbles and craters in the staining or The lacquer layer is reduced and at the same time the length of time in which the lacquered or painted surfaces are dust-free must be kept shortened; this product is preferably made from the fatty acid esters and silicone oils comprehensive group selected.

According to the invention, the pigments are advantageously replaced by pulverulent, fibrous or flaky pigments formed, which essentially plasticized with substances such as hardened resins, rosin, acetochlorides Nitrocelluloses, abietin resins, chlorinated rubbers or polyamides, as they are known per se,

709812/0987

pre-coated or coated organic or mineral Include dyes.

The pigments are preferably present in the paint or paint compositions according to the invention in quantitative proportions between 5 and 20% by weight, based on the total weight of the composition ^ present.

The paints and varnishes according to the invention advantageously contain plasticizers, in particular from the Phosphates, phthalates, lactates, adipates, castor oil, polymeric plasticizers, vinyl esters or chlorinated phenols Group are selected.

According to yet another advantageous embodiment, the paints and varnishes according to the invention contain a matting agent which can advantageously be selected from the group consisting of polyethylene waxes, silicas or colloidal silicon oxides and all other matting products such as, for example, the "Polymers UF ^M from CYBA-GEIGY" group.

The crosslinkable nitrocellulose is present in the paint or varnish composition in an amount between 5 and 25 % by weight of the total weight of the composition, while the crosslinking agent, such as polyisocyanate, is present in an amount between 5 and 20% by weight of the total weight of the composition, wherein the solvents constitute from 40 to 80% by weight of the total weight of the composition.

The invention also includes a method of manufacture of the paints and varnishes mentioned, after which a solution of nitrocellulose in suitable organic solvents is produced, the optionally one or more resins from the in particular optionally hydroxylated homo-

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or cjopol ^ ere acrylic resins, polyester resins, polyurethane resins, Esters of rosin-modified polyesters, derivatives of phthalic anhydride-modified polyesters, butyl urethanes, Alkyd resins, homo- or copolymer vinyl resins, abietin resins, chlorinated resins, terpene derivatives, petroleum resins, Coumarone-indene resins, ketone resins, in the esters soluble chlorinated rubbers, phenol-formaldehyde resins, maleic resins, individually or as a mixture contain; this solution may also contain a surface-active one Agent and / or a bubble reducing agent and / or a plasticizer and / or a matting agent and / or a curing catalyst; in this solution 5 to 20 wt.% of the Total weight of the ready-to-use composition making up coloring pigments introduced, after which in the obtained mixture the crosslinking agent for the nitrocellulose, dissolved in suitable solvents, is introduced.

According to an advantageous embodiment of the method, the crosslinking agent is in the mixture of Pigments and nitrocellulose before applying the varnish or paint for application on the ones to be coated Surfaces introduced.

According to a further advantageous embodiment of the method according to the invention, this is essentially crosslinking agent formed by a polyisocyanate in the mixture of pigments and hydroxylated nitrocellulose introduced during the manufacture of the lacquer or paint, in which case the ratio between the functional groups of the polyisocyanate and the Nitrocellulose is between 1.4 and 8.0.

To carry out the invention one works preferably under the following conditions:

To achieve a lacquer according to the invention or

709812/098 7

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A composition of this type is first produced with binder properties which contains as essential components a crosslinkable nitrocellulose and a polyisocyanate which brings about the crosslinking of the nitrocellulose when it is applied to the surfaces to be coated. The nitrocellulose, the siccative properties of which are utilized according to the invention, has a hydroxyl number of at least 20 to 25, which is preferably in the region of 80 or more. It "is even possible to use non-hydroxylated nitrocelluloses , but this is generally done at the expense of the resistance of the paints and varnishes later made from these binders to chemicals and to a certain extent at the expense of their drying speed. It should be noted, however, that that by selecting more or less hydroxylated nitrocelluloses, paints and varnishes can be produced in which certain properties can be varied as desired; in particular, in the manufacture of paints and varnishes, there is a single mass, ie when the crosslinking agent is added during the actual production thereto to insert and not the time of application of the ink or of the varnish an interest »nitrocellulose with a low hydroxyl content to the nitrocellulose ensure in the mixture an excess of free polyisocyanates with respect to the OH function by which the paints obtained and color the desired The properties of hardness, gloss and chemical strength can be imparted, while at the same time the production in a single mass is possible.

The nitrocellulose is present in the final composition in an amount between 5 and 25%, while the aliphatic or aromatic organic polyisocyanate is present therein in amounts of 5 to 20 % by weight.

709812/0987.

total weight of the composition is present.

The nitrocellulose is also advantageously combined with other components that have the properties The final composition still improve j so it will with one or more of the following Components united:

more or less reactive adhesion-promoting or adhesive resins, which can be formed by hydroxylated or hydroxyl-containing acrylic resins, polyurethanes, polyesters, esters of colophony-modified polyesters, butyl urethanes, certain optionally reactive alkyd resins or derivatives "of phthalic anhydride-modified polyesters and which" Improve the anchoring ^{ability of} the lacquer or paint on the coated surface. These resins are present in an amount between 2 and 30% and can be used in a mixture, which in particular contain butyl urethanes and esters of colophony-modified polyesters in variable relative amounts or mixtures of these two resins or of one of them with - preferably crosslinkable - acrylic resins or with derivatives of phthalic anhydride modified polyesters, to name examples. By increasing the proportion of these adhesion-promoting resins in the mixture, the adhesive properties and the suppleness of the final paints or varnishes are increased, but at the same time the drying time and the time in which the varnish or paint must be kept dust-free is increased; the possibility of varying the proportion of adhesion-promoting resins in the mixture allows certain properties of the lacquers or paints finally obtained to be varied.

Inert filler resins, preferably under the Acrylic, abietin and vinyl resins are selected and the total content cm dry extract of the composition

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raise; Of these, methyl methacrylate is obtained because of its suppleness, which increases the plasticity of the Lacquer or the color and the "sheet" - or surface adhesion improved and because of its flowability relatively high concentrations preferred; among such resins are certain acetochlorides, certain vinyl or acrylic copolymers or homopolymers such as vinyl isobutyl ether and vinyl acrylate, certain chlorinated resins or terpene derivatives or petroleum resins, coumarone-indene resins, ketone resins, chlorinated ones soluble in the esters To name rubbers, phenol-formaldehyde resins or maleic resins, which are also suitable for use in the context of the Invention are suitable.

Agents that reduce the formation of bubbles or craters during the application of the varnish or paint or even prevent it, while at the same time facilitating the spread of the or the same and the section keeping the coated surfaces free of dust is shortened will; This subheading includes in particular fatty acids and silicone oils.

Surfactants, especially acetobutyrates of cellulose or sucrose, which contain the increase the composition of dry extract without changing the overall viscosity.

The nitrocellulose and the polyisocyanate as well as any other ingredients added to them are in suitable solvents dissolved among the esters and ketones or their combined mixtures such can be selected that the best final viscosity and one that promotes drying as quickly as possible Evaporation speed as well as a perfect surface tension can be achieved. Although the aromatic ones or chlorinated solvents for the most part

709812/0987

meet these criteria, they are nonetheless preferably excluded in favor of non-toxic solvents, whereby non-toxic varnishes and paints can be obtained. It is therefore preferred to use butyl, methoxybutyl and isopropyl acetates alone or in mixtures. The solvent (or solvent mixture) generally constitutes 40 to 80 % of the weight of the total composition.

The pigments incorporated into the binder and indicated above are commercially available organic or mineral pigments which are incorporated into the binder in the form of chips or powders which are soluble in the solvents used to make the binder without having to be crushed on a roller mill. Preferably - although not exclusively, dyes are used that are precoated with various substances, which can be hardened resins, rosin, acetochlorides, plasticized nitrocelluloses, hydrogenated abietin resins, chlorinated rubbers or polyamides, the last three coatings being selected if the application of benzene or chlorinated solvents can be provided. Depending on requirements, the content of pure pigment can vary from 10 to 80 % of the total weight including the coating product and plasticizer, which makes it necessary to adjust the proportions of pigment / binder depending on the colors used. For example, for the production of a high-gloss black lacquer with increased opacity, the introduction of a composite pigment (such as "Noir 22B ^M from the CONVERT Establishments, France) with 13 % carbon black, 65 % nitrocellulose with a viscosity of 1/2 and 22 % dibutyl phthalate in." an amount between 5 and θ wt. % of the total

709812/0987

composition sufficient to achieve a varnish, which shows the desired opacity and brilliance, while two or three times more white composite pigment for the achievement of comparable results (regarding the brilliance and opacity) must be provided. Instead of the pre-coated pigments, pigment powders of the classic type can be used, which have been previously prepared in a roller or ball mill in the Hasse von compact resins such as butyl urethane, acetobutyrate and / or esters of rosin.

The polyisocyanate dissolved in the above-mentioned solvent becomes the nitrocellulose mixture if necessary, further components and pigments are added in an organic solvent medium, either during the Paint production taking into account the conditions specified above or at the time of application or of the application of the varnish or the paint added to a premix, which is formed by the solution, the essential components of which are nitrocellulose and pigments.

The crosslinking can be improved and accelerated by the addition of a catalyst to the polyisocyanate, advantageously by a metal salt such as Tin octoate or dibutyltin dilaurate is formed, which not only accelerates drying, but also hardness of the crosslinked layer obtained and the resistance of the latter to chemicals is increased.

The paints and varnishes according to the invention are advantageously produced as follows:

In a suitable apparatus known per se, such as, for example, one with a turbo stirrer at about 1400 rpm provided vat or container, is the basic mix

7098 12/0987

introduced which the nitrocellulose together with diverse includes other components from the list given above in the solvent medium, which is formed, for example, by a 50:50 mixture of isopropyl acetate and butyl acetate; then one gives under Stir and gradually add the Kpmposit pigment. After stirring for 30 minutes, a homogeneous solution is obtained, either during manufacture or before

the application as an application on a surface to be painted, a solution of an aromatic or aliphatic polyisocyanate is dosed depending on the desired end result and added in a suitable solvent medium. This gives a homogeneous mixture of medium viscosity, which is completely suitable for application with a paintbrush or brush, shows increased opacity and dries at room temperature in a period of 10 minutes. This mixture is also completely suitable for applying paint with a high-pressure spray gun (if necessary, adjusting the viscosity) and it results in a paint that dries in the open air in less than 5 minutes. By diluting the above mixture by 30 to 100 % in a suitable solvent, a paint is obtained that can be used for assembly line coatings with spray guns at low pressure.

The pot life of these mixtures does not cause clogging the nozzles lead, lies in the closed container for several days.

The very shiny appearance of the surface of the lacquer or paint is due to the binding agent it contains here. This glossy appearance can be reduced or eliminated by using suitable matting agents such as Polyethylene waxes, colloidal silica or other suitable matting products can be added.

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The paints and varnishes according to the invention can with any suitable means are applied, in particular with paintbrushes, brushes, spray guns, by means of "raster set-off" etc. The type and manner of the order may include the previous application or application of a solution a crosslinking agent with subsequent application of the pigments, the crosslinkable nitrocellulose and optionally the further above-mentioned further resin-containing solution or vice versa comprise the preceding order the latter solution with subsequent application of a layer of crosslinking agent solution.

In the event that the varnishes are to serve as cosmetic products, vitamins, trace elements, smoothing or softening oils, etc. can advantageously be added to them, which are intended to strengthen or improve the substrates that support them, such as fingernails. ^: *

Further particularities of the invention are shown the following description of illustrative examples it emerges which various modifications are accessible within the scope of the invention.

example 1

A varnish of the following composition was produced:

A) Basic mixture t

crosslinkable nitrocellulose

(OH number: 80) 15.00 %

Cellulose acetobutyrate 1.50 96

Butyl urethane 2.00 %

Esters of rosin-modi-

fused polyester 3.00 %

709 812/0987 _o f »al inspected

- y $ -Al Fatty acid esters 2640047 1.50 96 Butyl methacrylate 2.50 96 Solvent: Isopropyl acetate 30.00 96 Butyl acetate 17.50 96 Composite Piement (RuB) 8.00 % aliDhatisch.es Polvisocvanat 20.00 96 B) C)

75% solution in ethyl acetate

Example 2

A varnish of the following composition was produced;

A) Basic mixture:

hydroxylated nitrocellulose 12.50 % (OH number: 80)

solvent 49.00 1.50 Cellulo seacetobutyrate hydroxylated methyl methacrylate 21.00 60% in ethyl glycol acetate 10.00 non-reactive resins 4.00 Polyethylene glycol optical brightener 2.00 Anti-bladder agents Wetting agents UV stabilizer etc. 20.00 B) Composite pigment C) crosslinking agent:

Polyisocyanate 10.00 to 20.00%

Catalyst (dibutyl tin dilaurate) 0.30 96

* Lufflitol ^{V £ y} , the acrylate resin. BASF with 0.143 mol hydroxyl in 100g solid resin

709812/0987 original inspected

Example 3 - paint composition

A) basic mix;

Solvent 52.00 %

hydroxylated nitrocellulose 10.00 % sucrose acetobutyrate 3.00 % branched polyurethane-polyester resin 7.00 % linear polyurethane-polyester resin 14.00 %

Anti-bladder, anti-blocking

medium, antioxidant, UV sta-

2.00 %

bilisatör etc.

B) Composite PJgment 12.00 %

C) crosslinking agent:

Polyisocyanate 10.00-20.00 %

Dibutyltin dilaurate 0.30 96

The properties of the paints according to Examples 1 and 2 were the tested. The results obtained are summarized in the table below:

7 09812/0987 -nmr «« *,

^OW QWAL INSPECTED

TABEL

co

co

PO

co

00

O JO

ω m

LACK No. 1 7 % LACK No. 2 Τδϋσ 10 % In both cases it was Dry extract 31% by weight
of the entire * des
Resins binder Well Dry extract 37% wt.
of resins »des
Binder Ik weight 96 des
Binder Well to 75% in butyl acetate /
Isopropyl acetate (1: 1) Sum of hy- 950
droxylated "T? w7
Resins ^ιυυυ Well Sum of hy-
droxylated
Resins Networking with aromatic
Polyisocyanate; 75 # ig in
Ethyl acetate; present too Well diluted;
after networking Pigments: 10% by weight des
Binder very quickly Pigments: 5 % quickly Networking with aromatic
Polyisocyanate 75 # in
Ethyl acetate; present too outstanding Well very good 3 % mediocre Well very good Spread and surfaces
tension Well outstanding quickly outstanding Opacity Well pretty good very good very good Drying very quickly very good outstanding pretty good shine outstanding very good
outstanding small amount pretty weak
very good Suppleness mediocre outstanding Scratch resistance small amount middle Shock resistance small amount " bad
Well Liability to non-treated
tem metal Well "... treated
Adhesion to - "polyethylene
Plastics.
^ PCV Well
Well

CD CD

TABLE (continued)

I.
ω . ^! 1 PAINT number 1 7 96 LACK No. . 2 325
1000 10 % In both cases it was Dry extract
the whole
Resins 31 wt.%
= »Des
Binder bad Dry extract 37% by weight
of resins = des
Binder 14 wt.% Of
Binder Well to 75 % in butyl acetate /
Isopropyl acetate (1: 1) Sum of hy-
droxylated
Resins 250
1000. bad Sum of hy ~
droxylated
Resins Networking with aromatic
Polyisocyanate; 75% in
Ethyl acetate; present too Well diluted;
after networking Pigments: 10% by weight of the
Binder outstanding Pigments: 5 % outstanding O
CO Networking with aromatic
Polyisocyanate 75% in ethyl
acetate; present too outstanding pretty good outstanding if 3% outstanding pretty good outstanding NJ
* s »
O . acetone no insensitive outstanding insensitive CO
OO τ «<- * - ester
LiOsunpcs ~ * ** ^ no outstanding medium - light petrol outstanding outstanding resistance C> ^. ^ ₁ outstanding insensitive ^ Alcohol outstanding ta Mercury chrome insensitive

From the table above and the description above, it follows that regardless of the type the implementation of the invention, the chosen implementation and application or type of application of paints and varnishes with increased opacity and ultra-fast drying in the open air and at room temperature, the opposite hitherto known paints and varnishes have significant advantages, in particular:

- Ultra-fast drying of coatings that are dust-free and can be manipulated 5 minutes after their application; this drying takes place in the open air and at room temperature.

- a greatly increased opacity, which usually only allows a single layer to be used, whereby it should be noted that the high drying speed greatly reduces the effects of runaway and allows significant orders in a single pass.

- Complete elimination of the passage through drying chambers or heating ovens, which leads to a considerable increase in productivity on the assembly line as well as to a complete saving of thermal energy (a "classic" thermosetting paint generally requires a 30 to 45 minute stay at 180 ⁰ C for its Drying).

- After complete crosslinking in the open air, a hardness can be achieved that is that of glazed Email is equivalent as well as physical and mechanical properties associated with it: very high adhesion to substrates and surface hardness as well as high resistance to external Agents and solvents.

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- The possibility given to the user to adjust the lacquer parameters as desired by varying the amount of crosslinking agent from 0.5 to 20 % , whereby an increase in the crosslinking agent content corresponds to an increase in anchoring, brilliance and surface hardness at the expense of impact resistance.

- The pot life of the mixture extends beyond 5 days.

-The paints and varnishes can be applied to any material in a very satisfactory manner such as treated and untreated metals, wood, leather, some plastics, and minerals Glass products by varying the crosslinking content depending on the respective substrate.

- They can be used with any device or system for manual or machine operation such as spray guns with low or high pressure, film-forming Veils or "curtains" or even magnetically working coating systems (because of their polarity before crosslinking).

- They can be free from all traces of toxic aromatic or chlorinated solvents, which means that work hygiene is in line with safety regulations guaranteed.

their production is efficient and quick, since comminution on the roller is avoided.

Usable polyisocyanates are about the Desmodure ^ from Bayer, e.g. types L, IL, N or HL, SI, VL, R, RF etc.

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These polyisocyanates have roughly the following chemical composition:

Desmodur L "reaction product of toluene diisocyanate with a triol such as 2 _f 2-bis (oxymethyl) -butanol;

IL = autopolymerization product of tolylene diisocyanate containing isocyanurate cycles;

N = reaction product of hexamethylene diisocyanate with water;

HL = aromatic-aliphatic polyisocyanate based on of tolylene diisocyanate and hexamethylene diisocyanate;

SI = polyisocyanate with significantly higher molecular weight and linear structure;

VL = mixture of diphenylmethane-pjp'-diisocyanate with its homologue;

R s triphenylmethane-p, ρ ', P ^M -triisocyanate; RF a O ^ triphenyl ^{thiophosphate-p, p f} , p ^w -triisocyanate.

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Claims (16)

Claims 1.) Paints and varnishes with increased opacity, ultra-fast Drying and extended pot life using a crosslinking agent such as an aliphatic or aromatic contain organic polyisocyanate, characterized in that they are essentially by combining suitable organic or mineral pigments in suitable solvents are soluble or dispersible, with a ,, binder are formed, in addition to the aforementioned polyisocyanate crosslinking agent »Dissolved in suitable organic solvents, carrying a hydroxyl group includes crosslinkable reactive nitrocellulose which itself consists of one or more reactive adhesion-promoting resins acrylic resins, especially those containing hydroxyl groups, esters of colophony-modified polyesters, carbamides ster, alkyd resins, derivatives of phthalic anhydride-modified polyesters and, if necessary, polyurethanes and polyesters comprehensive group or one or more inert filler resins from the in particular acrylic, abietin and vinyl resins, Aceto.chlori.de, vinyl or acrylic copolymers or -Homopolymers, chlorinated resins, terpene derivatives, petroleum resins, Coumarone-indene resin, ketone resins, soluble in the esters chlorinated rubbers and phenol-formaldehyde resins or maleic resins are. 2. paints and varnishes according to claim 1, characterized in that they have a surface-active agent such as in particular an acetobutyrate of cellulose or sucrose contain. 709812/0117 3. Paints and varnishes according to claim 1, characterized in that that they facilitate their spread when used and the formation of bubbles and craters in the paint or lacquer layer while at the same time reducing the amount of dust on the coated surfaces contain reducing product, which preferably from the group comprising fatty acid esters and silicone oils is selected. 4. paints and varnishes according to claim 1, characterized in that that the pigments are formed by pulverulent or fibrous or flaky pigments, the ^ m essential with substances such as hardened resins, rosin, acetochlorides, plasticized nitrocelluloses, Abietin resins, chlorinated rubbers or polyamides, as they are known per se, organic precoated or mineral dyes. 5. Paints and varnishes according to one of claims 1 to 4, characterized in that the pigments in the coloring or varnish composition are present in an amount between 5 and 20% by weight of the total weight of the composition. 6. paints and varnishes according to any one of claims 1 to 5, characterized in that they contain plasticizers, in particular from phosphates, phthalates, lactates, adipates, castor oil, polymeric plasticizers, vinyl esters or chlorinated phenolic compounds are selected. 7. paints and varnishes according to any one of claims 1 to 6, characterized in that they are a matting agent contain, in particular from polyethylene waxes, silicas or colloidal silicon oxides and any 709812/0987 ; V; ; ■ 3 ■■■ .- ■; ': ■■ · / ■■■ "■■■". ■' = - "'■ -. ■ .-' at - ^: what other matting products group is chosen. 8. paints and varnishes according to one of claims 1 to 7, characterized in that the crosslinkable nitrocellulose in the paint or varnish composition in an amount between 5 and 25% by weight of the total weight of the composition is present. 9. paints and varnishes according to one of claims 1 to 8, characterized in that the crosslinking agent such as Polyisocyanate in an amount between 5 and 20% by weight of the total weight of the composition is present. 10. Paints and varnishes according to any one of claims 1 to 9, characterized in that the solvent 40 to 80 wt.% Of the total weight of the composition. 11. Paints and varnishes according to one of claims 1 to 10, characterized in that they contain a catalyst which accelerates the crosslinking, which is formed by a metal salt composed of, in particular, tin octoate and dibutyltin dilaurate comprehensive group is formed. 12. Process for the production of paints and varnishes, characterized in that there is a solution of hydroxyl groups Carrying reactive nitrocellulose in suitable organic solvents which fin or more Adhesion-promoting resins made from, in particular, those containing hydroxyl groups Acrylic resins, rosin-modified esters Polyesters, carbamide esters, reactive alkyd resins, derivatives of phthalic anhydride-modified Polyesters and optionally polyurethanes and polyesters comprising group and also contains one or more inert Filler resins from the in particular acrylic, abietin 709812/0987 or vinyl resins, acetochlorides, vinyl or acrylic copolymers or homopolymers, chlorinated resins, terpene derivatives, Petroleum resins, coumarone-indene resin, ketone resins, Chlorinated rubbers soluble in the esters, phenol-formaldehyde resins, Haieinharze comprising group and optionally also a surfactant and / or a bubble reducing agent and / or contains a plasticizer and / or a matting agent and / or a crosslinking catalyst, after which, in the solution formed, 5 to 20% by weight of the total weight of the ready-to-use composition making up organic or mineral coloring pigments are introduced or incorporated and that you then in the mixture obtained contains an agent for crosslinking the nitrocellulose such as polyisocyanate dissolved in suitable Brings solvents. 13. The method according to claim 12, characterized in that that the crosslinking agent in the mixture of pigments and nitrocellulose immediately before the use of the Lacquer or paint for application to surfaces to be painted is introduced. 14. The method according to claim 12, characterized in that the essentially formed by a polyisocyanate Crosslinking agent in the mixture of pigments and hydroxylated nitrocellulose during the Manufacture of lacquer or paint is introduced, in which case the relationship between the functional Groups of polyisocyanates and nitrocellulose is between 1.4 and 8.0. 15. The method according to claim 12, characterized in that the crosslinking agent dissolved in a suitable Solvent applied to the surface to be painted and the solution mixed with resins if necessary 709812/0987 of pigments and nitrocellulose according to claim 12 the crosslinking agent layer is applied. 16. The method according to claim 12, characterized in that the optionally mixed with resins solution of pigments and nitrocellulose according to claim 12 applied to the surface to be painted and the crosslinking agent dissolved in a suitable solvent is applied to the layer of pigments and nitrocellulose. 709812/0987 ORIGINAL INSPECTED