EXTRUDABLE FLUOROPOLYMER BLEND

• Main Author: BLONG THOMAS J
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2015
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a method for improving surface properties of an extrudate of a melt processable fluoropolymer.SOLUTION: A composition comprises a major amount of a first semi-crystalline fluorinated copolymer and a minor amount of a second fluoropolymer effective to reduce melt defects. Each fluoropolymer is selected from polymers (a) to (d), mentioned below. The second fluoropolymer is selected from a category other than the category in which the first fluoropolymer is selected. (a): a semi-crystalline perfluorinated copolymer, (b): a fluoropolymer derived from interpolymerized units of at least one essentially perfluorinated monomer and at least one non-fluorinated hydrogen-containing monomer, (c): a fluoropolymer derived from interpolymerized units of at least one partially-fluorinated monomer, and optionally at least one essentially perfluorinated monomer, and (d): an amorphous copolymer of tetrafluoroethylene and hexafluoropropylene. 【課題】溶融加工性フルオロポリマーの、押出物表面の性質の改良方法の提供。【解決手段】多量の半結晶質フッ素化コポリマーと、溶融欠陥を低減させるために有効な少量の第２のフルオロポリマーとを含む組成物。各フルオロポリマーが、下記の（ａ）〜（ｄ）のポリマーから選択される。前記第２のフルオロポリマーが、前記第１のフルオロポリマーが選択されるカテゴリー以外のカテゴリーから選択される。（ａ）半結晶質過フッ素化コポリマー（ｂ）少なくとも１つの本質的に過フッ素化されたモノマーと少なくとも１つの非フッ素化水素含有モノマーとの共重合単位から誘導されたフルオロポリマー（ｃ）少なくとも１つの部分的にフッ素化されたモノマー、及び任意に少なくとも１つの本質的に過フッ素化されたモノマーとの共重合単位から誘導されたフルオロポリマー（ｄ）テトラフルオロエチレンとヘキサフルオロプロピレンとの非晶質コポリマー【選択図】なし