Copolymers containing fluorine and their use for the water-repellent and oil-repellent treatment of various substrates
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United States of America Patent
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Dec 28, 1982
Grant Date -
N/A
app pub date -
Jan 27, 1981
filing date -
Feb 19, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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: ##STR1## 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: ##STR2## in which B' is an alkylene radical, R' is a hydrogen atom or an alkyl radical, R.sub.1 is an alkyl, hydroxyethyl or benzyl radical, R.sub.2 is a hydrogen atom or an alkyl, hydroxyethyl or benzyl radical or R.sub.1 and R.sub.2, together with the nitrogen atom, form a heterocyclic radical: (c) 1 to 50% of a monomer or monomers of the formula: ##STR3## in which R.sub.3, R'.sub.3, R.sub.4 and R.sub.5 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.
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