| 摘要 |
<p>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: <IMAGE> 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: <IMAGE> 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: <IMAGE> (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.</p> |
