MANUFACTURING METHOD OF FLUORINE-CONTAINING ELASTIC COPOLYMER

• Main Authors: HATTORI YUKIKO, KOSE TAKEHIRO
• Format: Patent
• Language: English; Japanese
• Published: 27.12.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a manufacturing method of a fluorine-containing elastic copolymer capable of providing the fluorine-containing elastic copolymer to which other resins are hardly contaminated, and less in content of metal elements.SOLUTION: There is provided a manufacturing method of a fluorine-containing elastic copolymer for aggregating and recovering a fluorine-containing elastic copolymer by mixing latex containing the fluorine-containing elastic copolymer and an acid solution containing acid in a container, in which one made by metals and having a part in contact with acid has metal elution amount by a following elution test of at least 10 mass.ppm or less is used as the container, and acid having no metal element is used as the acid. Elution test: A value is calculated and defined as a metal elution amount by extracting a value by measuring content of metal elements in the acid solution after inputting 50 mL of the acid solution at 50°C into a glass-made container for 6 days from a value by measuring content of the metal elements in the acid solution after a metal piece with 100 mm×10 mm×1 mm is impregnated into 50 mL of the acid solution in a glass-made container at 50°C for 6 days.SELECTED DRAWING: None 【課題】他の樹脂が含フッ素弾性共重合体に混入しにくく、かつ金属元素の含有量が少ない含フッ素弾性共重合体を得ることができる含フッ素弾性共重合体の製造方法の提供。【解決手段】容器内にて含フッ素弾性共重合体を含むラテックスと酸を含む酸水溶液とを混合することによって、含フッ素弾性共重合体を凝集させて回収する含フッ素弾性共重合体の製造方法であり、容器として少なくとも酸と接する部分が下記溶出試験による金属溶出量が１０質量ｐｐｍ以下となる金属からなるものを用い、酸として金属元素を有しない酸を用いる。溶出試験：１００ｍｍ×１０ｍｍ×１ｍｍの金属片をガラス製容器中の５０℃の前記酸水溶液の５０ｍＬに６日間浸漬した後、酸水溶液における金属元素の含有量を測定した値から、５０℃の酸水溶液の５０ｍＬをガラス製容器中に６日間入れた後、酸水溶液における金属元素の含有量を測定した値を引いた値を計算し、金属溶出量とする。【選択図】なし