METHOD FOR PREPARING FLUOROALYKYL IODIDE TELOMER MIXTURE AND FLUORINE-CONTAINING (METH)ACRYLIC ESTER MIXTURE

• Main Authors: TANAKA YOSHINORI, TANAKA KUNITADA
• Format: Patent
• Language: English
• Published: 30.09.2004
• Edition: 7
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To obtain a mixture of telomers having a degree n of polymerization of ≥k (k being any one integer of ≥3). SOLUTION: A fluoroalkyl iodide represented by the formula: RfI (wherein Rfis a 1-10C fluoroalkyl group) is reacted with tetrafluoroethylene to obtain a reaction mixture comprising a mixture of fluoroalkyl iodide telomers represented by the formula: Rf(CF2CF2)nI having a degree n of polymerization of ≥1, and this mixture is subjected to a distillation process and separated into a fraction comprising a mixture of fluoroalkyl iodide telomers having a degree n of polymerization of ≤(k-1) and a fraction comprising a mixture of fluoroalkyl iodide telomers having a degree n of polymerization of ≥k to obtain the latter fraction as a product. COPYRIGHT: (C)2004,JPO&NCIPI