A PROCESS FOR TINTING PLASTIC ARTICLES

• Main Authors: ARCHEY RICK L, PYLES ROBERT A, NIKOLAKOPOULOS MICHAEL, DERIKART DAVID M
• Format: Patent
• Language: English
• Published: 17.02.2006
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM; DYEING OR PRINTING TEXTILES; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; LAUNDERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF TEXTILES OR THE LIKE; WORKING-UP

A process for tinting a molded article is disclosed. The process entails applying by spraying or by flow coating a hot, dye-solution onto at least a portion of the surface of a molded article to obtain a tinted article and washing the tinted article. In addition to the dissolved dye, the dye solution that is substantially free of particulate matter contains an aqueous solution of an organic solvent and a surfactant. The article is one molded of a thermoplastic molding composition. In an embodiment of the invention, the dye solution is prepared by filtering a hot aqueous solution through a bag filter that contains a dye to obtain a hot, dye-solution. In a further embodiment, activated carbon is used to purify the dye solution to obtain a dye-free aqueous solution.