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Compositions and process for the oilproofing and waterproofing treatment of construction materials

  • US 4,478,975 A
  • Filed: 01/19/1984
  • Issued: 10/23/1984
  • Est. Priority Date: 01/28/1983
  • Status: Expired due to Term
First Claim
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1. A composition for the treatment of construction materials which comprises, by weight:

  • (A) from 0.1 to 25% of at least one fluorinated copolymer formed from;

    (1) 5 to 70% of one or more fluorinated esters of the formula;

    ##STR13## in which Rf represents perfluoro alkyl with straight or branched chain containing 2 to 20 carbon atoms, Q represents oxygen or sulfur, W represents a bivalent bond connected to Q by carbon and capable of containing one or more atoms of a member selected from oxygen, sulfur, nitrogen and mixtures thereof, one of the symbols R represents hydrogen and the other symbol R represents hydrogen or alkyl containing 1 to 4 carbon atoms;

    (2) 4 to 50% of one or more monomers of the formula;

    ##STR14## in which R'"'"' represents hydrogen or alkyl containing 1 to 4 carbon atoms and R" represents alkylene containing 2 to 4 carbon atoms, and(3) 0 to 91% of one or more unsaturated monomers other than and copolymerizable with the monomers of formulas (I) and (II);

    (B) from 2 to 25% of at least one polyisocyanate or isocyanate prepolymer which may be aliphatic or aromatic;

    (C) from 0.1 to 10% of at least one catalyst; and

    (D) one or more diluting solvents to make up to 100%, the content of non-volatiles in the composition not exceeding 30%.

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