Abstract:
The disclosure relates to an anti-corrosion paint, a so-called shop primer, which comprises colour pigment, anti-corrosion pigment, filler and binder for painting steel sheet and permitting gas-cutting with completely slag-free sections, without adhering slag and at high cutting speed without the occurence of pocking on the cut surfaces or release of the cut section. The filler in the paint comprises a heat-resistant pulverulent polymer which consists of cured phenolic resin or furane resin.
Abstract:
Self-healing coatings are formed by first phosphating or nitriding ferrous parts, then coating with an emulsion of e.g. polysiloxane, oil, sorbitan derivative and sodium sulfonate, butyl cellosolve, oleic acid. Preferred phosphating is to a thickness of 2,000-3,000 mg Zn phosphate/square foot. This coating passes 240-plus hours in 5 % salt spray (ASTM B-117) and resists wash off with car wash soap.
Abstract:
The new rust-inhibiting primer compositions exist in the form of high-resistance emulsions. The compositions contain, in addition to the customary components of the film formers, the chelating agents and the acid activators, up to 6% by weight of silicon powder, 1% by weight of anionic heteropolysaccaride and up to 10% by weight of air-drying oils. The new primer compositions exhibit improved application properties and enhanced rust protection qualities compared with the known means.
Abstract:
A stable thixotropic coating composition especially suitable for dipspin application which comprises (a) an acid binder aqueous solution which comprises phosphate ions and ions of the group of chromate ions or molybdate ions, (b) an acid-stable, non-colloidal amorphous silica and (c) a nonionic surfactant; a method for coating an article by dipspin application of said composition and parts coated therewith.
Abstract:
A process for preparing an antirust composition is described, particularly for underbody and already painted and finished motor vehicle parts, having improved physical and mechanical properties, which comprises: 1) preparing a reaction mixture obtained by mixing a preformed product containing an emulsifier, an organic diluent and an inorganic carbonate, with one or more monomers, water and a radicalic catalyst, 2) heating the mixture thus obtained to polymerize the monomer, and 3) further heating to vaporize water, optionally under vacuum, the polymer being formed in situ in the basic gelified composition. A method to provide better rust strength to painted parts or surfaces using the composition thus prepared is also described.
Abstract:
Self-healing coatings are formed by first phosphating or nitriding ferrous parts, then coating with an emulsion of e.g. polysiloxane, oil, sorbitan derivative and sodium sulfonate, butyl cellosolve, oleic acid. Preferred phosphating is to a thickness of 2,000-3,000 mg Zn phosphate/square foot. This coating passes 240-plus hours in 5% salt spray (ASTM B-117) and resists wash off with car wash soap.
Abstract:
An autodepositing composition for forming an autodeposited resinous coating on a metallic surface comprising an acidic aqueous solution having dissolved therein acid and oxidizing agent and having dispersed therein resin solids, wherein said oxidizing agent is an iodine-containing compound and wherein the resin of said resin solids is preferably a resin which includes in its polymeric structure unsaturated groups in the form of a carbon-to-carbon double bond.
Abstract:
The invention concerns a coating composition which may be used to form a peelable solder mask. The coating composition comprises a mixture of vinylic resin, microcrystalline wax and solvent. Applied as a film coating, the coating composition can be used to provide a temporary mask to selected areas of a substrate, for example, a printed circuit, prior to exposure to a solder flux, the mask being readily peelable from the substrate.