Compositions: coating or plastic – Coating or plastic compositions – Natural resin or derivative containing
Utility Patent
1999-04-27
2001-01-02
Brunsman, David (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Natural resin or derivative containing
Utility Patent
active
06168657
ABSTRACT:
The present invention description concerns an adhesive varnish, its use to receive powdered pigments, as well as applications of the use mentioned.
Paints are, according to the technical literature, coating materials of liquid to paste consistency which are applied by brushing, spraying, dipping, or pouring on the surfaces or objects to be painted and which, through physical and/or chemical drying, yield a firmly adhering coating on the substrate, for the most part a very thin layer (paint film). Paints consist of a dissolution of suitable organic film formers and plasticizers in a solution or a mixture of solutions, possibly with the addition of siccatives (drying agents) or even pigments. Pigmented paints are referred to as varnish paints.
Important paints are now described specifically:
Oil varnishes are solutions of natural or synthetic resins and drying oils with additions of siccatives in volatile organic solvents, such as oil of turpentine or naphtha. Drying oils used in addition to wood oil are primarily linseed oil, also tall oil. castor oil, oiticica oil. and perilla oil. The oils are concentrated by heating to form bodied oils, whereby groups of 2 to 3 oil molecules generally form.
The term synthetic resin paints usually refers to air- and oven-dried alkyd resin paints, also with additions of other resin types. In a broader sense, synthetic resin paints are all paints or varnish paints with synthetic resins as film formers. These include, for example, urea, melamine, and phenolic resins and other plastic materials for paints.
Essential in all reported cases is thus the fact that the paint and is applied either without pigment powder, i.e., solid pigment mixtures, or already contains these. Painting with subsequent independent addition of pigments has not been taught.
The adhesive varnish to receive powdered pigments according to the invention overcomes this disadvantage.
The adhesive varnish to receive powdered pigments according to the invention is characterized by contents of colophony and pretreated linseed oil in a solvent system which contains primarily hydrocarbons, in particular naphtha with a boiling range ~80 to ~160° C. and technical ethanol.
Said colophony is advantageously technically pure and is present in the mixture at a rate of 14 through 36—in particular 24 through 30—wt-%; the pretreated linseed oil is formally prepolymerized under air intake and is present in the mixture at a rate of 8 through 20—in particular 10 through 16—wt-%.
It is important that the solvent system consist primarily of naphtha with a boiling range ~100 through ~140° C. and includes as a second component technical, possibly denatured ethanol at a rate of 1 through 10 wt-%—based on the system.
The primary role of the adhesive varnish specified above applied to a substrate—possibly in the form of symbols, letters, or the like—is to receive even a plurality of powdered pigments, whereby the powdered pigment(s) is(are) applied to the adhesive varnish freely or by means of precut films, in particular brushed on or blown on.
The powdered pigment is advantageously dust-free, i.e., it has virtually no components of 0 . . . 10 &mgr;m.
Possibly, the pigmented adhesive resin layer can be protected by means of a transparent lacquer coat or film.
The pigmented adhesive resin layer can subsequently be completely removed easily by means of a mixture of technical grade ethanol and water. Washing off using known biodegradable cleaners is also possible.
The application of said resin-powdered pigment system according to the invention serves for colored drawing and/or writing on substrates of glass, polished stone, glazed ceramic, but also on baked lacquer and synthetic or natural material surfaces, in particular for temporary colored writing on display windows.
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Brunsman David
Ladas & Parry
Rafka GmbH
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