Process for stabilizing moldings of high molecular weight thermo-plastic polycarbonates

Process for stabilizing moldings of high molecular weight thermo-plastic polycarbonates

Articles of high molecular weight thermoplastic polycarbonates having high resistance to ultraviolet radiation while retaining good mechanical properties prepared by applying to the surface of the articles a liquid mixture containing 2 - 20 percent by weight of an ultraviolet absorber in a mixture o...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PEILSTOCKER, GUNTER, COHNEN, WOLFGANG
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
WORKING-UP
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Beschreibung
Zusammenfassung:Articles of high molecular weight thermoplastic polycarbonates having high resistance to ultraviolet radiation while retaining good mechanical properties prepared by applying to the surface of the articles a liquid mixture containing 2 - 20 percent by weight of an ultraviolet absorber in a mixture of 10 to 80 parts by weight of one or more aliphatic C1 - C3 halogenohydrocarbons, 20 to 80 parts by weight of one or more lower aliphatic C1 - C4 alcohols, which may be halogen-substituted, and 0 to 25 parts by weight of water. The mixtures are applied to the polycarbonate at room temperature and subsequently dried at 70 DEG - 100 DEG C.