| 摘要 |
1. Claims for the contracting States BE, CH, DE, FR, GB, IT, LI, LU, NL, SE Fluoro copolymers, characterized in that they comprise, by weight : (a) 30 to 70% of one or more polyfluoro monomers of general formula : see diagramm : EP0195714,P13,F3 in which R**f denotes a straight- or branched-chain perfluoro radical containing 2 to 20 carbon atoms, Q denotes an oxygen or sulphur atom, B denotes a divalent chain sequence linked to Q via a carbon and capable of containing one or more oxygen, sulphur and/or nitrogen atoms, one of the symbols R denotes a hydrogen atom and the other a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms ; (b) 10 to 50% of one or more monomers of general formula : see diagramm : EP0195714,P13,F4 in which R**1 denotes a hydrogen atom or a methyl radical, R**2 denotes an alkyl radical containing 1 to 4 carbon atoms, n is equal to 2 or 3 ; and optionally (c) up to 40% of any one or more monomers other than those of formulae (I) and (II). 1. Claims for the Contracting state AT Process for the preparation of fluorinated products, characterized in that there are copolymerized, by weight : (a) 30 to 70% of one or more polyfluoro monomers of general formula : see diagramm : EP0195714,P14,F2 in which Rf denotes a straight- or branched-chain perfluoro radical containing 2 to 20 carbon atoms, Q denotes an oxygen or sulphur atom, B denotes a divalent chain sequence linked to Q via a carbon and capable of containing one or more oxygen, sulphur and/or nitrogen atoms, one of the symbols R denotes a hydrogen atom and the other a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms ; (b) 10 to 50% of one or more monomers of general formula : see diagramm : EP0195714,P14,F3 in which R1 denotes a hydrogen atom or a methyl radical, R2 denotes an alkyl radical containing 1 to 4 carbon atoms, n is equal to 2 or 3 ; and optionally (c) up to 40% of any one of more monomers other than those of formulae (I) and (II) ; within an organic solvent and in the presence of a polymerization catalyst and/or of a photoinitiator. |
