DE1669214C2 - Zinc dust based paint based on water-thinnable organic binders - Google Patents

Description

16

Example I.

Parts by weight of water-soluble phenolic resin

6O ° / opH = 8 to 9 90.0

Butanol 20.0

Butyl glycol 15.0

Water 160.0

Ammonium chromate 2.0

Zinc dust 700.0

Antimony trioxide 3.0 As anti-settling agent: silica .... 10.0

1000.0 example Π

Parts by weight _x -Water-soluble melamine resin

60% pH = 8 to 9 100.0

Butanol 20.0

Propyl glycol 20.0

Water 125.0 _a0

Zinc dust 690.0

Strontium chromate 30.0 Bismuth trioxide 5.0 As anti-settling agent: silica .. 10.0

1000.0 as jf

Example Hf

Parts by weight of water-soluble alkyd resin

55% pH = 8 to 9 120 _; D.

Butanol 10.0

Methyl glycol 10.0

Water 120.0

Guanidine chromate 5.0 Zinc chromate 15.0

Zinc dust 700.0

Antimony trioxide 3.0 Bismuth trioxio 2.0 As anti-settling agent: silica .. 15.0

1000.0

The great technical progress of the possibility of stabilizing paints according to the invention lies in the simple production method and the achieved high storage and processing ability of several weeks or months, even use in the immersion process is permitted

Claims (3)

ι 2 coating agents result. In doing so, the formation of patent claims: Hydrogen must be prevented at least for a certain longer period of time in order to use such systems as Eracompo- 1. Transport and process paint containing zinc dust based on nentenmaterial film-forming water-thinnable organic 5 can. Binder, characterized by a. It is known to ui metal dust prior to its use Content of water as well as of chromates in the Am paint against the aggressive effects shield moniums, zinc, strontium, guanidines or MeI- from water by coating with amines, alone or in admixture, and waterproof thin films. The Metallan Antimony trioxide and / or bismuth trioxide as io powder with solutions of quick-drying binding stabilizers. average, such as B. Nitrocellulose, natural and artificial 2. Coating material containing zinc dust after being resinated, waxed or polymerized substances spoke 1, characterized in that it contains the anhydrous, rapidly volatile organic Lo-Chromate mixed in amounts of 0.1 to 10 weighting agents and then by spraying Percent, based on zinc dust. 15 or otherwise dried. Another 3. Coating material containing zinc dust, if possible, is the vapor deposition of a hydrophobic standard 1 and 2, characterized in that there are particles of material. However, all of these procedures pose Antimony trioxide and / or bismuth trioxide in Men represent its own manufacturing process, which also gene of 0.1 to 0.5 percent by weight, based on expensive equipment and requires a lot of work. Zinc dust. »» There are still methods known, those containing zinc dust Paint based on aqueous alkali silicate solutions (water glasses), which are based on the strongly alkaline reaction of the inorganic Binder quickly to hydrogen evolution and »5 Thickening of the mixture tends to be durable for shorter or longer periods of time. This works through Mixtures of zinc dust with organic film - simple addition of smaller amounts of lead compounds Substances dissolved in organic solutions such as fertilizers. B. red lead, lead chromate, etc. or medium, find small amounts of antimony trioxide or large amounts because of their high level of corrosion protection Use as a paint for metals, especially amounts of sodium or potassium chromate Iron and Steel. Requirement for together with organic compounds that are several The durability of such mixtures is that they all contain amino groups for the finished paint component are completely free of water, since zinc dust is a component or one of its components, the water glass »It reacts quickly with water under hydrogen or zinc dust. development. The formation of gas leads to difficulties. It has now been found that zinc dust-containing during storage and transport as well as paints based on film-forming water thinner such unstable paint This organic binder can be stabilized Circumstance previously forbade the use of such can, if the water-based paint is low organic binders that dilute with water quantities of chromates of ammonium, zinc, are bar, for the production of paint containing zirikstaub- 40 strontium, guanidines or melamine, alone or in middle. Mixing with each other and small amounts of anti The use of water as a solution and montrioxid and / or bismuth trioxide are added. Diluent for organic binders It was found that the simultaneous use of organic solvents and diluents of at least one inhibitor each offered the paint manufacturer and consumer a range of advantages to provide sufficient stability. Since water is not flammable, tat leads. This means that the water and zinc dust containing is non-explosive, non-toxic, the beach paints are omitted and remain free of any hydrogen development for a longer period of time Hung special regulations and implementation of measures for transport, storage and manual transport, storage - and processable. It turned out to be inflammable and harmful to health that the salts of chromium substances. In addition, water is cheap and acidic everywhere, depending on the water solubility, an addition of 0.1! Is available. Therefore, there is great interest and one to 10 percent by weight and of the metal oxides practical need for zinc dust-containing paints - an addition of 0.1 to 0.5 percent by weight, based on the medium, which is water-soluble or water-based on zinc dust as a binder, is sufficient to achieve the long-thinnable organic film-forming substances with a stabilizing effect,
keep. Such binders, air-drying and oven-drying, it was true in the case of zinc dust-containing aqueous ones Type, their solubility or dilutability in water, alkali silicate solutions, which lead compounds, such as due to the accumulation of polar groups in the molecule and red lead and lead chromate, contain, already known, possibly adding their neutralization with ammonia or arsenic compounds such as arsenic trioxide, Amines are already available today in large 60 but these substances serve to prevent fouling Number on the market and their share in that of the dried coatings. It wasn't too much The binders commonly used in the paint industry will conclude that by antimony or bismuth trioxide further increase the stability of zinc dust-containing paints due to the aforementioned Advantages. Known paints of this type contain water-thinnable organic binders th as pigments among other things titanium dioxide, could not be influenced. Surprisingly shows but zinc dust. It was therefore an obvious choice to use lead chromate in paints containing zinc dust and to look for ways that contain organic binders in the presence of water containing water when using such a base Binder with zinc dust stable anser no stabilizing effect.