METHOD OF IMPROVING SLIPPERINESS

• Main Authors: FUJIWARA TERUAKI, TAKIYAMA KEIICHI, FUJIOKA KAZUCHIKA
• Format: Patent
• Language: English
• Published: 28.03.1988
• Subjects: 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

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.