PRODUCTION METHOD OF LIQUID CRYSTAL POLYESTER COMPOSITION

• Main Authors: FUKUHARA YOSHIYUKI, MATSUMI YASUO
• Format: Patent
• Language: English; Japanese
• Published: 30.08.2018
• 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; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a method capable of producing a liquid crystal polyester composition excellent in mold releasability and less likely to cause blisters at a high temperature.SOLUTION: A liquid crystal polyester composition is produced by supplying a liquid crystal polyester and a polyhydric alcohol fatty acid ester to an extruder having a vent portion, and melt-kneading the materials under the condition of a decompression degree of -0.06 MPa or lower in terms of a gauge pressure in the vent portion. The supply amount of the polyhydric alcohol fatty acid ester is preferably 0.1 to 1.0 parts by mass with respect to 100 parts by mass of the liquid crystal polyester.SELECTED DRAWING: None 【課題】離型性に優れ、高温下でブリスターが発生し難い液晶ポリエステル組成物を製造しうる方法を提供する。【解決手段】ベント部を有する押出機に、液晶ポリエステルと多価アルコール脂肪酸エステルとを供給し、前記ベント部の減圧度がゲージ圧で−０．０６ＭＰａ以下の状態で、溶融混練することにより、液晶ポリエステル組成物を製造する。多価アルコール脂肪酸エステルの供給量は、液晶ポリエステル１００質量部に対して、０．１〜１．０質量部であることが好ましい。【選択図】なし