LAMINATE, METHOD FOR PRODUCING LAMINATE AND FLUORORUBBER COMPOSITION

• Main Authors: KOMAZAWA KOZUE, MASUI TOSHIAKI, INABA TSUYOSHI, KUWAJIMA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide a laminate which uses a fluororesin excellent in low fuel permeability, and can strongly bond a fluororesin layer and a fluororubber layer even when using a VdF/HFP/TFE copolymer having a coefficient of absorptivity at 1720 cmof more than 0.35 which was measured after having contacted triethylamine as a fluororubber.SOLUTION: A laminate has a fluororubber layer (A) and a fluororesin layer (B) laminated on the fluororubber layer (A), where the fluororubber layer (A) is a layer formed from a fluororubber composition, the fluororubber composition contains a fluororubber (a1), hydrotalcite and a basic polyfunctional compound which contains at least two nitrogen atoms in the molecule and has a distance between nitrogen atoms and nitrogen atoms in the molecule of 5.70 Å or more, the fluororubber (a1) is a vinylidene fluoride/hexafluoropropylene/tetrafluoroethylene copolymer, and the fluororesin layer (B) is composed of a fluororesin (b1) having a coefficient of fuel permeability of 2.0 g mm/m/day or less.SELECTED DRAWING: None 【課題】低燃料透過性に優れるフッ素樹脂を用い、かつ、フッ素ゴムとしてトリエチルアミンと接触させた後に測定した１７２０ｃｍ−１の吸光係数が０．３５を超えるＶｄＦ／ＨＦＰ／ＴＦＥ共重合体を用いた場合であっても、フッ素樹脂層とフッ素ゴム層とを強固に接着させることができる積層体を提供する。【解決手段】フッ素ゴム層（Ａ）と、フッ素ゴム層（Ａ）上に積層されたフッ素樹脂層（Ｂ）と、を備える積層体であって、前記フッ素ゴム層（Ａ）は、フッ素ゴム組成物から形成される層であり、前記フッ素ゴム組成物は、フッ素ゴム（ａ１）、ハイドロタルサイト、及び、分子中に少なくとも２個の窒素原子を含有し、分子中の窒素原子−窒素原子間の距離が５．７０Å以上である塩基性の多官能化合物を含み、フッ素ゴム（ａ１）は、フッ化ビニリデン／ヘキサフルオロプロピレン／テトラフルオロエチレン共重合体であり、前記フッ素樹脂層（Ｂ）は、燃料透過係数が２．０ｇ・ｍｍ／ｍ２／ｄａｙ以下であるフッ素樹脂（ｂ１）から構成されることを特徴とする積層体。【選択図】なし