Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1995-06-05
1997-05-27
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524297, 524479, 524487, 524561, 524562, 524563, 524745, 428344, C08K 510
Patent
active
056333056
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a coating composition based on waxes or wax-like compounds or air-drying oils or alkyd resins.
2. Discussion of Related Art
Metallic substrates are provided with film-forming coatings to protect them against corrosion. Several different types of coating are used for this purpose, depending on requirements. This applies in particular to steel substrates, as encountered for example in the automobile industry. Because of their design, automobile bodies, for example, have a number of awkwardly situated cavity voids and seams which are inadequately coated during normal lacquering processes and which are normally coated with waxes or wax-like compositions. These compositions are required to show very good wetting behavior and adhesion behavior with respect to the substrate to be coated, a good water (vapor) barrier effect and, during application, good creep behavior so that they are able under the effect of capillary forces to penetrate into the fine capillary cavities or seams and to displace any layers of water present. As mentioned above, these coatings are used in awkwardly situated places so that their mechanical strength, hardness and abrasion resistance generally have to meet only minimal requirements. These compositions are also commonly referred to as "cavity sealing compounds".
Waxes and/or fats or oils as binders have long been successfully used for these anticorrosive coatings. The waxes used may be vegetable waxes (for example carnauba wax, montan wax), animal waxes, mineral waxes, more particularly petrochemical waxes (petrolatum, oxidized petrolatum, paraffin waxes or microwaxes), chemically modified waxes or even synthetic waxes. In addition, drying oils or chemical modifications thereof, such as long-oil alkyd resins, for example, either on their own or in combination with the above-mentioned waxes, and also synthetic hydrocarbon resins may be used.
The anticorrosive coatings contain corrosion inhibitors as a further constituent. The corrosion inhibitors may be, for example, inorganic pigments, organic inhibitors such as, for example, amines or salts thereof or metal salt dispersions. One representative of metal salt dispersions, the so-called superbasic calcium salts of organic sulfonic acids, are used particularly frequently for anticorrosive coatings because they apparently form films highly impermeable to the diffusion of water vapor and, by virtue of their basic nature, are capable of neutralizing corrosion-promoting acid traces from the environment. A review of such metal salt dispersiens can be found, for example, in R. M. Morawek, Modern Paint Coatings, 69 (1979), 49-51. These metal salt dispersions are also commercially known by the name of "SACI" (severe atmospheric corrosion inhibitors).
The superbasic calcium salts of organic sulfonic acids are prepared, for example, by stirring calcium oxide and/or hydroxide into alcoholic or aqueous/alcohol solutions of sulfonic acids of paraffin hydrocarbons and subsequently introducing carbon dioxide, calcium oxide or hydroxide being used in such a quantity that a considerable excess of calcium oxide or hydroxide is left in the dispersion. Superbasic calcium sulfonates in the context of the present invention and their production and use as lubricants or rustproofing agents are described, for example, in DE 19 19 317 or in EP 405 879.
Other typical constituents of the formulations are pigments, including for example so-called anticorrosive pigments, and/or fillers, such as chalks (both natural ground and also finer precipitated chalks), grinding or dispersing aids in the form of fatty acid salts of organic amines and, where drying oils and/or alkyd resins are present, antiskinning agents and so-called dryers or siccatives which catalyze the oxidative crosslinking of the drying oils or alkyd resins.
The anticorrosive coating compositions may be sprayed on through special nozzles in the form of solutions or dispersions in organic solvents, such as hydrocarbons (gasoline
REFERENCES:
patent: 4150192 (1979-04-01), Downey
patent: 4210567 (1980-07-01), K osters
patent: 4386173 (1983-05-01), Chang
patent: 4957955 (1990-09-01), Saur et al.
patent: 5001188 (1991-03-01), Petrillo et al.
Reitenbach Dirk
Schwittay Winfried
Stamm Dieter
Wesch Karl
Guarriello John J.
Jaeschke Wayne C.
Michl Paul R.
Ortiz Daniel S.
Teroson GmbH
LandOfFree
Coating composition with heat-curing film formation and its use does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coating composition with heat-curing film formation and its use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coating composition with heat-curing film formation and its use will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2329653