METHOD OF IMPROVING SLIPPERINESS

PURPOSE:To obtain a polyester film having excellent transparency and slipperiness, by adding fine particles of a specified maleimide polymer to a polyester and molding the mixture into a film. CONSTITUTION:A maleimide compd. (a) of the formula [wherein R1 and R2 are each H, halogen, a 1-15C alkyl or...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIWARA TERUAKI, TAKIYAMA KEIICHI, FUJIOKA KAZUCHIKA
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS FUELS GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a polyester film having excellent transparency and slipperiness, by adding fine particles of a specified maleimide polymer to a polyester and molding the mixture into a film. CONSTITUTION:A maleimide compd. (a) of the formula [wherein R1 and R2 are each H, halogen, a 1-15C alkyl or a (substd.) aryl; and R3 is a 1-15C alkyl, a cycloalkyl or a substd. aryl] (e.g., N-phenylmaleimide) is polymerized with optionally, a monomer (b) copolymerizable with the component (a) (e.g., methyl methacrylate) to obtain fine particles of a maleimide polymer (B) having an m.p. of not lower than 280 deg.C, pref. 300 deg.C and an average particle size of 0.05-10mu. 0.01-5wt% (based on the amount of the component A) component B is added to a polyester (A). The mixture is melt-extruded into a sheet, thus obtaining a film.