METHOD OF TREATING A PLASTIC ARTICLE

• Main Authors: ARCHEY RICK L, PYLES ROBERT A, DERIKART DAVID M
• Format: Patent
• Language: English
• Published: 18.12.2006
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ATOMISING APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; NOZZLES; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

In the method of the present invention at least a portion ofthe surface of a plastic article (e.g., a molded article of thermoplastic polycarbonate) is contacted with (e.g., immersed in) a treatment composition which includes one or more performance additives. The treatment composition contains: (i) at least one performance additive (e.g., an ultraviolet light absorber); (ii) water; (iii) at least one carrier represented by the following general formula (I), wherein R1 is a radical selected from the group consisting oflinear or branched C1-C18 alkyl, benzyl, benzoyl and phenyl, R2 is a radical selected from the group consisting of linear or branched C1-C18 alkyl, benzyl, benzoyl, phenyl and H, n is 2, 3 or 4, and m is 1 to 35; and (iv) a diol selected from at least one of linear or branched C2-C 20aliphatic diols, poly(C2-C4 alkylene glycol), cycloaliphatic diols having from 5 to 8 carbon atoms in the cyclic ring, monocyclic aromatic diols, bisphenols and hydrogenated bisphenols. In an embodiment of the present invention, the carrier is ethyleneglycol monobutyl ether, and the diol is diethylene glycol.