HU204546B - Stabile colour-dispersions - Google Patents

Abstract

To prepare high stability, alkaline acting varnish dispersions 0.5-3.0 wt.% monocarboxylic amine salt is added to the varnishes. The quantity is based on binder solids. The amine salt is pref. dissolved in the preheated binder.

Description

The present invention is a well-stored paint dispersion composition having a relatively high volume of solution volume.

Frequent quality defects in the storage of lacquer paints result in the formation of sediment that is difficult or not to mix, in other words, the lack of stability of the paint dispersion.

This is a very common problem when storing anticorrosion paints, which have a relatively high pigment-to-dye concentration and often have a high density of high-density anticorrosive pigments. exert.

Additives which increase the stability of paint dispersions under certain conditions are known in the art and in the art.

The effect of some of these is based on adsorbing on the surface of the pigment, due to a given layer thickness, to increase the distance between solids and thereby reduce the agglomeration of Van Der Waals forces.

Other additives reduce the tendency to settle by reducing the zeta potential. However, these agents are system-specific and often reduce the pH of the dispersion, which is unacceptable in anti-corrosion coatings.

U.S. Patent No. 4,338,136 discloses a method for preparing rapidly disintegrating bitumen emulsions. Rapidly degradable bitumen emulsions are prepared by the use of a liquid emulsifier which is prepared by condensation at 160-18 ° C with diethylene triamine and a C 12-18 carbonate with iodine fatty acid, followed by partial cyclization of the condensed product. At -240 ° C. Diethylenetriamine and fatty acids are used in a minimum molar ratio of 5: 1. The final product has a total amine index of at least 5.6 and max. Contains 10% free diethylenetriamine. The condensate produced during the process is used as a plasticizer and plasticizer, which enables the bitumen to retain its deformability at room temperature.

The Jpn. Kokai Tokkyo Kobo 7,947,749 describes plasticizers. 2,800 g of tall oil fatty acid and 767 g of trieolenic teramine were heated at 150-200 ° C for 3 hours to give 3,354 g of condensation product by removal of 213 g of water. To 1500 g of the condensation product was added 360 g of formalin and heated at 85 + 2 ° C for four hours to give 1594 g of methylated plasticizer under vacuum to which was added 40 parts by weight of 60 parts by weight of resole phenol resin in methanol. The resulting product was impregnated with kraft paper, dried at 120 ° C for 5 minutes, and 14 sheets pressed at 160 ° C for one hour. The resulting laminate has excellent impact resistance, dimensional stability and flexibility.

900 or 901 Budalakk Minimium Oil Paint or Rapid Zinc Chromate Primer, both manufactured by Budalakk Budapest see page 60

Budalakk: (Technical Catalog of Varnish and Paint 1978.

41, respectively. 47) lacquer oil binder products.

Their shelf life is only a few months, although they contain aluminum stearate stabilizer.

The paint dispersions contain polar pigments. The polar pigments or the soaps they produce are actually oxidation catalysts (Dr. Gyula Deák, Handbook of Organic Chemical Processes, Technical Publisher, Budapest 1978, pages 727 and 742, and the Römpp Chemical Lexicon, Technical Publisher, Budapest, 1983). ) and thus oxidize or polymerize olefinic bonds in the various binder systems to produce "skin hardening" and / or. they cause thickening.

It is an object of the present invention to provide a dye dispersion stabilizer which can be used successfully in many different binder systems and which does not reduce, but enhance the corrosion inhibitory effect of the inhibitory pigments.

An ideal starting material for our work was the avenging aliphatic fatty acids, which, with their highly polar Kaiboxyl group and their apolar hydrocarbon chain, are capable of forming a solvate envelope that provides a smooth transition between polar pigments and non-polar binders. Starting from the fatty acids, we then sought compounds which, by reacting with the former, could neutralize their undesired pH, while further improving the wetting and stabilizing effect. In the polyvalent aliphatic amines, a group of compounds was found which provides the desired effect in an optimal manner.

Multiple aliphatic amines are reacted with fatty acids such that the latter reacts with only one hydrogen atom of the amine. Amine fatty acid salts were obtained which were ideally used to stabilize oil enamels, oil paints and alkyd resin-based enamels, while providing an alkaline pH in the corrosion inhibiting primers to optimize the inhibitory effect.

The stabilized paint dispersions of the present invention contain 0.3-1.0% by weight of a C15-18 unsaturated monocarboxylic acid with diethylenetriamine or triethylene teramine in an amount of 0.3-1.0% by weight based on the total weight of the dispersion in addition to the oil enamel, oil paint, alkyd resin binder, solvent, pigment and inhibitor. contains its salt.

In addition to the above effects, the use of an amine fatty acid salt of 0.53.0% by weight based on the solids content of the binder significantly improved the paint's brushability, deflection and adhesion. It also improved the penetration of paint into the pores of the metal surface, further enhancing the corrosion-inhibiting effect

In practice, the corrosion protection of steel surfaces involves the use of rust and paint. remover removal is imperfect and in many cases questions the effectiveness of corrosion protection paints.

Mono-fatty acid salts of polyhydric aliphatic amines greatly increase the wet content of residual rust particles2

EN 204 546 Β, or. penetration into their pores The application of the product thus provides a much greater degree of protection, especially in practical life, on non-ideally cleaned steel surfaces.

In our further work, we have selected those amine salts whose consistency and manageability facilitate their industrial application.

It has been found that the salts of certain polyvalent aliphatic amines (e.g., diethylene triamine monolinolate) are liquid and have a viscosity that allows the product to be pumped and / or pumped. factory pipelines

As a result of this work, we have succeeded in finding novel products that, for the first time, provide complete stabilization of paint systems by simultaneously improving many paint properties (spread, brushability, adhesion, etc.) with ease of industrial application.

Examples:

1. Mineral oil paints Lacquer oil (density: 0,928-0,935 iodine number: 175-185) Linoleic acid Diethylene triamine

12.00 parts by weight

2.00 parts by weight 0.12 parts by weight

Lead aluminum (density: 8.8 g / cm ³ , oil number: 5-7 PbO ₂ :

341%) 60.00 parts by weight

Weight spatula (oil number 12-15, density 4.2 g / cm ³ ) 26.00 parts by weight

PTK: 46 (Pigment volume concentration)

Linoleic acid and diethylenetriamine are weighed into a mixer and a reflux condenser. The mixture was heated to 140 ° C with stirring and kept at that temperature for 30 minutes and then cooled to room temperature (this is essentially the so-called Schmidt reaction, Schmidt Reaction 1: Romp: Chemical Publisher, Budapest, 1984).

Weigh the varnish oil and the fatty acid salt into the dissolver mixing vessel at 300 rpm and add the ferric and the weight pad. The speed of the dissolver was increased to 1200 rpm and stirring continued for 20 minutes. The mixture is then dispersed on a pearl mill or a three-cylinder grinding machine.

2. Alkyd resin based paint Alkyd resin solution (50% w / w)

white spirit solution; linoleic , phthalic anhydride and produced from pentaenitrite; viscosity: 400-1600 mPas, Mt 600-1600) 55.0 parts by volume Zinc chromate 15.00 parts talc 3.00 parts Calcium carbonate 12.88 parts per ton Cobalt drier 2.00 parts Naphtha 6.00 parts Lead-dryer 4.00-iész linoleic 2.00 parts Triethylenetetraamine 0.12 parts by weight

The dye preparation was carried out in the same manner as in Example 1, however, the alkali resin solution was replaced with zinc chromate, talc, calcium carbonate, cobalt drier, white spirit and lead drier instead of lacquer oil, and alkali resin solution. in the order you specified.

3. "Mineral oil paint 901" (comparative embodiment) according to the specification of Budalakk (Budalakk Paint and Synthetic Factory Varnish and Paint Technical Catalog, 1978, page 41; Kovács Lajos: Varnish and Paint Pocket Book, 1982. 457 and Page 458.)

In all of the same procedures as in Example 1, but instead of linoleic acid and diethylenetriamine, weight pads were used, increasing the weight pad to 28.12 parts by weight.

In our experimental work we investigated the extent to which the monocarboxylic acid amine salts improve system stability and corrosion protection of primers.

In the stability studies, the increase in viscosity at 60 ° C was measured. During the corrosion tests, the test plates were exposed to a salt mist chamber (MSZ 8888/10). It has been found that the additive, the monocarboxylic acid, a polyvalent aliphatic amine salt, results in a noticeable improvement even at low concentrations (0.5% by weight).

The optimum amount must be determined and verified on a case-by-case basis. Overdose eg. 3% by weight or more can reduce the drying, water resistance and hardness of the paints.

The stability and salt chamber test results are summarized in the following table for the two examples described herein:

The amount of the additive according to the invention, % Minium oil paints Alkyd resin primer 0 ^yrs 0.5 3 Oxx / 0.5 3 Discharge Time MSZ KGST 1443 at 20 ° C, sec 200 190 181 152 152 140 After 24 hours 243 190 181 185 154 140 After 48 hours 386 205 183 293 187 140

HU 204546 Β

Amount of additive according to the invention,% Minium oil paints Alkyd resin primer 0? 0.5 3 0 "/ 0.5 3 After 72 hours immeasurable 209 183 387 201 141 Fossil chamber test MS 8888/10 qualification MSZ 9640/36 After 24 hours 10 10 10 10 10 10 After 72 hours 9 10 10 9 10 10 After 240 hours 8 10 10 7 9 10 After 500 hours 7 8 10 6 8 10

Comparative Example Preparation. Budalakk's "Minimal · Oil Paints 901", stabilizing agents for aluminum stearate

Comparative embodiment example. Budalakk's Rapid Zinc Chromate Primer also contains aluminum stearate stabilizing carbon.

Storage time according to MSZ 13910

Pattern number Shelf life, month Comment 1 2 there is no thickening or thickening 2 2 there is no skin thickening or thickening Comparative 3 2 skin thickening and thickening can be observed

Studies of both the stability and the tetanus chamber and the shelf life clearly demonstrate that the stabilized paint dispersions of the present invention are of higher quality than the xmmeit compositions.

Claims (1)

Patent Claim Point A stabilized oil enamel, oil paint, or alkyd resin-based solvent, pigment, and inhibitor-based dispersion in paint dispersion, wherein the stabilizer is 0.3-1.0% by weight of a 15-160 unsaturated monocarboxylic acid containing 120-160% iodine. triamine or triethylene tetramine in a 4: 1 molar ratio.