Abstract:
A method for coating surfaces in general, and decorating them with powders of various colours characterised by: applying to the surface to be decorated, previously treated for this application, a layer of powdered coating material of colour corresponding to the desired background for the decoration to be obtained, heating the surface treated in this manner to a temperature lower than the baking temperature of the powdered coating material, but sufficient to fix it to the surface to be decorated, applying to the surface prepared in this manner at least one powder of colour corresponding to the coloured motif to be reproduced, distributing it in accordance with the desired pattern of this motif, subjecting the surface treated in this manner to final baking for a time and at a temperature sufficient to securely fix said powder to said surface.
Abstract:
A method is described for adjusting magnetic properties of iron-containing magnetic films. The coercivity of magneto-optic films such as bismuth garnet films is adjusted by an annealing method which comprises reduction with a reducing agent such as H2 followed by oxidation using an oxidizing agent such as O2 and/or O3 to adjust to required coercivity levels with the sequence of reduction followed by oxidation repeated one or more times to obtain required coercivity. It is also an aspect of the invention to precede the first reducing treatment with an oxygen annealing step to enhance uniformity of the switching field.
Abstract:
A method for coating glass by chemical-vapor deposition below 200 DEG C, at atmospheric pressure of a gaseous mixture of a tin oxide precursor, a silicon dioxide precursor and an accelerant such as triethyl phosphite provides deposition rates greater than 350 ANGSTROM per second. The layer of material deposited can be combined with other layers to produce an article with specific properties such as controlled emissivity, refractive index, abrasion resistance, and appearance.
Abstract:
The invention concerns a process for producing multilayer enamel coatings in which (1) a base varnish in the form of an aqueous, pigmented base varnish containing a water-dilutable polyurethane resin is applied to the surface of the substrate, (2) a polymer film is formed from the varnish applied in step (1), (3) a transparent coating varnish is applied to the base coat so obtained, and (4) the base coat is stoved, together with the coating varnish. The water-dilutable polyurethane resin contains structural units of formula (I), wherein X stands for a divalent aromatic hydrocarbon residue and R?1 and R2¿ stand for an alkyl residue with 1 to 4 carbon atoms.
Abstract:
A paint coated article has a plurality of paint layers (12, 14) containing a polymeric binder and reflective flakes, such as metal flakes, coated on a substrate. Flakes (15) in the outer layer (14) are of relatively large average size and are present in a concentration such that the layer is light transmissive. The flakes (13) in the inner layer (12) are of relatively smaller average size and the coverage of the inner layer is sufficient that the total paint coating is opaque. The paint coated article has excellent distinctness of image, gloss, flop and covering power. In a particularly preferred embodiment, the paint layers are applied as coatings on a thermoformable carrier film (16) to provide a stretchable and flexible sheet material adapted for use in a thermoforming process in which it is stretched and bonded to a three dimensional substrate, such as an exterior automobile panel, to form thereon a decorative coating exhibiting a high degree of geometric metamerism.