DE1000549B - Corrosion-protecting paint, especially for metal surfaces - Google Patents

Description

Applicant:
Van den Doel & Fray CV, The Hague

Representative: Dipl.-Ing. R. Oedekoven, patent attorney,
Düsseldorf-Oberkassel, Hansa-Allee 255

Claimed priority:
Netherlands from October 31, 1950

Franciscus Theodorus Gijsbertus

Johannes van der Leeuw, Voorburg (Netherlands),

has been named as the inventor

Lead chromate, lead molybdate and lead sulphate pigments, 15 parts by weight of diacetone alcohol, Parts by weight of toluene and 5 parts by weight of ethyl acetate.

Then it is ^{baked in at 232 °} for 15 minutes. If desired, you can apply additional layers of lacquer, which are also baked on.

PATK CLAIM:

Corrosion protection paint, especially for metal surfaces, consisting of one or more macromolecular ether compounds as a binder and with at least one anti-corrosive, a pigment containing a chromate group, characterized in that the pigment in addition to the chromate group, it also contains a molybdate group.

Considered publications:

Farben, Lacke, Anstrichstoffe, 1949, p. 152;

Paint Manufacture, 1947, XVII, 11, p. 391;

Prospectus of the RCI re. Molybdate and Chrome oranges, April 1948, p. 9;

Catalog of RCI re. Colors for paints, 1948, p. 13, and catalog of RCI re. Chemical Pigments Colors, 1949, p. 53.

© 609 7 + 0/411 12.56

Claims (1)

GERMAN The invention aims to produce a paint with the highest resistance to chemically aggressive substances, even against synthetic detergents, so that these substances in containers without harmful effects can be transported and stored. Metal surfaces can be protected against corrosion by means of a layer of varnish. For this purpose, you can use a varnish that contains one or more pigment components. However, such lacquer layers prove to be inadequate during transport and storage of certain detergents because of their strong ability to attack. In particular, synthetic detergents which _{contain one or more —-SO 3} Na or —O - SO ₃ Na groups, e.g. B. the sulfonate of secondary alcohols, extremely aggressive. Lacquers with macromolecular ether compounds as binders are known to be very resistant against chemical influences. Without the addition of anti-corrosive pigments, these paints are for protection metallic surfaces not sufficiently effective; this applies in particular to the case that the metal surfaces come into contact with synthetic soaps. Even after adding anti-corrosive Chromate pigments to varnishes made from macromolecular ether compounds the metal surfaces are not sufficiently against. Corrosion protected. There are now pigments which, in addition to a chromate group, also contain a molybdate group. the The use of such pigments in paints, including those that are baked, is known per se. It has been found that a paint that acts as a binder or one or more macromolecular Contains ether compounds, then these requirements are satisfied if the pigment is apart from a chromate group also contains a molybdate group. Macromolecular ether compounds can be used to produce a paint according to the invention use the ethoxylin resins known per se, which z. B. are prepared by condensation of p, p'-dioxydiphenyldimethylmethane and epichlorohydrin. example A Paint of the following composition applied in the usual way: 80 parts by weight of an ethoxylin resin, 35 parts by weight of a «mixed crystals of anti-corrosive paint, especially for metal surfaces