Compositions: coating or plastic – Coating or plastic compositions – Corrosion inhibiting coating composition
Patent
1992-10-02
1994-08-09
Lieberman, Paul
Compositions: coating or plastic
Coating or plastic compositions
Corrosion inhibiting coating composition
106 19C, 106 19E, 106 19F, 106 31R, C09D 1300
Patent
active
053363060
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a new and improved composition and process for producing coloring compositions. These have use in water soluble solid paints, poster paints, for color brushes and for roller balls, crayons, and the like. The coloring compositions of this invention also contain sparkle components which are maintained as a stable and uniform solid suspension in the coloring system.
The present paint compositions containing such sparkle components are pleasing visually, and also tend to take on the appearance of a multi-dimension because they are usually applied in a non uniform fashion.
Prior art paint compositions are manufactured at comparatively high temperatures estimated at about 130.degree. F., and produce a paint that hardens rapidly. Consequently, beaters are generally used at various steps of the process, and this requirement makes it difficult to clean the equipment. Also, it is difficult to obtain water soluble paint compositions containing sparkle components that can be maintained as a stable and uniform suspension.
Water soluble paint compositions produced by prior art processes generally do not contain a smell or scent component because they are evaporated or volatized by the high processing temperature. However, if a lower processing temperature range was possible, smell components such as scents, fragrances and perfumes could be incorporated and retained in the composition.
THE INVENTION
According to the invention, a water soluble paint composition is provided containing: water; a polymeric thickener to maintain solid components such as the color and the sparkle or glitter in a uniform and permanent suspension; a water soluble wax to thicken and harden the composition; glycerin, and-the like to increase the time span of hardening to enable the mixture to flow without undue heating; and adhesive thickener; and, glitter and coloring agents.
The polymeric thickener may include a polyacrylic or polymethacrylic acid having polyfunctional groups; the polymeric acid is thickened or cured with an activator, infra. A typical polymeric thickener is sold by B. F. Goodrich under the trade name of CARBOPOL. Another suitable polyacrylic acid is sold as CARBOMER 941. The function of the thickener is to solidify the composition as a gel near the termination of the mixing process, and this enables solids such as glitter, sparkle or color to be maintained as a uniform and permanent solid suspension.
Other thickeners included in the term `polymeric thickener` are: nitrile latexes, styrene-butadiene latexes, polyisobutylene, acrylic latexes, rosin gum, food thickeners such as flours and starches, fumed silica, hydroxypropyl methyl cellulose, hydroxybutyl methyl cellulose, and so forth.
The water soluble wax is employed to thicken and harden the composition, The use of the wax offsets the cost of the more expensive adhesive thickener such as gum arabic, and also functions as an adhesive itself. Typical water soluble waxes are of the microcrystalline variety, and include EMERWAX 1255 and METHOCEL.
Glycerin is used to enable the composition to flow with little or no application of heat and to increase the time span of hardening (to say within 48 hours). The glycerin is usually employed as 99.5% U.S.P. The glycerin may be replaced with sorbitol, and to a certain extent with other alcohols such as cetyl, and mixtures thereof.
The combination of the glycerin, wax and polymer results in a coloring composition which is liquid and pourable at a temperature in excess of about 85.degree. F. Hence, no expensive processing equipment is required. Moreover, upon contact with air, the surface of the coloring composition will harden, and this permits subsequent handling after the processing step to facilitate pouring into molds and curing in place.
An activator for the polymeric thickener is used to polymerize and thereby thicken the polymer. In the case of the polyacrylic acid, suitable catalysts or activators include triethanolamine, and other amines such as ethyl, propyl and hexyl. In addition to causing the suspe
REFERENCES:
patent: 4840670 (1989-06-01), Hughes et al.
patent: 4840699 (1989-06-01), Hughes et al.
patent: 4859242 (1989-08-01), Hughes et al.
Hughes Cleveland L.
Mandel Paul M.
Williams Timothy N.
Color Quest Inc.
Einsmann Margaret
Krawitz Willie
Lieberman Paul
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