FLUOR COPOLYMERS, THEIR APPLICATION TO THE HYDROPHOBIC AND OLEOPHOBIC TREATMENT OF DIFFERENT SUBSTRATES, AND SUBSTRATES THUS TREATED

摘要

The invention relates to fluorinated copolymers and their application to the waterproofing and oil-resistance treatment of various substrates. These copolymers comprise by weight: (a) 35 to 98% of a monomer or monomers of the formula: in which Rf is a perfluoro radical, Q is an oxygen or sulfur atom, B is a bivalent chain linked to Q by a carbon atom, one of the symbols R is a hydrogen atom and the other a hydrogen atom or an alkyl radical: (b) 1 to 15% of a monomer or monomers of the formula: in which B' is an alkylene radical, R' is a hydrogen atom or an alkyl radical, R1 is an alkyl, hydroxyethyl or benzyl radical, R2 is a hydrogen atom or an alkyl, hydroxyethyl or benzyl radical or R1 and R2, together with the nitrogen atom, form a heterocyclic radical: (c) 1 to 50% of a monomer or monomers of the formula: (III) in which R3, R'3, R4 and R5 are hydrogen atoms or alkyl radicals; and possibly (d) up to 10% of any other monomer. These copolymers are particularly well adapted to the waterproofing and oil-proofing of paper and similar articles.