Fluorourethane additives for water-dispersed coating compositions

A polyfluorourethane compound which is the product of the reaction of:

• (1) at least one polyisocyanate or a mixture of polyisocyanates containing at least three isocyanate groups per molecule, (2) at least one fluorochemical compound containing at least one Zerewitinoff hydrogen in an amount sufficient to react with 5% to 33% of the isocyanate groups in the polyisocyanate, (3) at least one compound of the formula R.sub.10 --(R.sub.2).sub.k --YH in an amount sufficient to react with 5% to 80% of the isocyanate groups in the polyisocyanate and wherein R.sub.10 is a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 omega-alkenyl radical, or C.sub.2 -C.sub.18 omega-alkenoyl;
• R.sub.2 is --C.sub.n H.sub.2 n-- optionally end-capped by --›OCH.sub.2 C(R.sub.4)H!.sub.p --›OCH.sub.2 C(CH.sub.2 Cl)H!.sub.p --, or --C(R.sub.5)(R.sub.6)(OCH.sub.2 C›CH.sub.2 Cl!H).sub.p --, wherein R.sub.4, R.sub.5, and R.sub.6 are the same or different and are H or a C.sub.1 -C.sub.6 alkyl radical, n is 0 to 12, p is 1 to 50;
• Y is O, S, or N(R.sub.7) wherein R.sub.7 is H or C.sub.1 -C.sub.6 alkyl;
• and k is 0 or 1;
• and optionally (4) water in an amount sufficient to react with 5% to 60% of the isocyanate groups in the polyisocyanate.

An improved water-dispersed coating composition comprising an emulsion, latex, or suspension of a film-forming material dispersed in an aqueous medium wherein the improvement comprises the incorporation into the aqueous medium of a polyfluorourethane compound which is the product of the reaction of:

• (1) at least one diisocyanate, or polyisocyanate or mixture of polyisocyanates containing at least three isocyanate groups per molecule, (2) at least one fluorochemical compound containing at least one Zerewitinoff hydrogen in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate, (3) at least one compound of formula R.sub.10 --(R.sub.2).sub.k --YH in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate and wherein R.sub.10 is a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 omega-alkenyl radical, or C.sub.2 -C.sub.18 omega-alkenoyl;
• R.sub.2 is --C.sub.n H.sub.2 n-- optionally end-capped with;
• --›OCH.sub.2 C(R.sub.4)H!.sub.p --, --›OCH.sub.2 C(CH.sub.2 Cl)H!.sub.p --, or --C(R.sub.5)(R.sub.6)(OCH.sub.2 C›CH.sub.2 Cl!H).sub.p -- wherein R.sub.4, R.sub.5, and R.sub.6 are the same or different and are H or a C.sub.1 -C.sub.6 alkyl radical, n is 0 to 12, p is 1 to 50;
• Y is O, S, or N(R.sub.7) wherein R.sub.7 is H or C.sub.1 -C.sub.6 alkyl;
• and k is 0 or 1;
• and optionally (4) water in an amount sufficient to react with 5% to 60% of the isocyanate groups in the diisocyanate or polyisocyanate.

A method for improving the cleanability of a surface having deposited thereon a dry coating composition comprising addition to the coating composition prior to drying of a polyurethane compound which is the product of the reaction of:

• (1) at least one diisocyanate, or polyisocyanate or a mixture of polyisocyanates containing at least three isocyanate groups per molecule, (2) at least one fluorochemical compound containing at least one Zerewitinoff hydrogen in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate, (3) at least one compound of the formula R.sub.10 --(R.sub.2).sub.k --YH in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate and wherein R.sub.10 is a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 omega-alkenyl radical, or C.sub.2 -C.sub.18 omega-alkenoyl;
• R.sub.2 is --C.sub.n H.sub.2 n-- optionally endcapped with --›OCH.sub.2 C(R.sub.4)H!.sub.p --, ›OCH.sub.2 C(CH.sub.2 Cl)H!.sub.p --, or --C(R.sub.5)(R.sub.6)(OCH.sub.2 C›CH.sub.2 Cl!H).sub.p --, wherein R.sub.4, R.sub.5, and R.sub.6 arc the same or different and are H or a C.sub.1 -C.sub.6 alkyl radical n is 0 to 12, p is 1 to 50;
• Y is O, S, or N(R.sub.7) wherein R.sub.7 is H or C.sub.1 -C.sub.6 alkyl;
• and k is 0 or 1;
• and optionally (4) water in an amount sufficient to react with 5% to 60% of the isocyanate groups in the diisocyanate or polyisocyanate.

A method for improving the oil repellency of a surface having deposited thereon a dry coating composition comprising addition to the coating composition prior to drying of a polyurethane compound which is the product of the reaction of:

• (1) at least one diisocyanate, or polyisocyanate or a mixture of polyisocyanates containing at least three isocyanate groups per molecule, (2) at least one fluorochemical compound containing at least one Zerewitinoff hydrogen in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate, (3) at least one compound of the formula R.sub.10 --(R.sub.2).sub.k --YH in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate and wherein R.sub.10 is a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 omega-alkenyl radical, or C.sub.2 -C.sub.18 omega-alkenoyl;
• R.sub.2 is --C.sub.n H.sub.2 n-- optionally end-capped with --›OCH.sub.2 C(R.sub.4)H!.sub.p --, --›OCH.sub.2 C(CH.sub.2 Cl)H!p--, or --C(R.sub.5)(R.sub.6)(OCH.sub.2 C›CH.sub.2 Cl!H).sub.p --, wherein R.sub.4, R.sub.5, and R.sub.6 are the same or different and are H or a C .sub.1 -C.sub.6 alkyl radical, n is 0 to 12, p is 1 to 50;
• Y is O, S, or N(R.sub.7) wherein R.sub.7 is H or C.sub.1 -C.sub.6 alkyl;
• and k is 0;
• or 1;
• and optionally (4) water in an amount sufficient to react with 5% to 60% of the isocyanate groups in the diisocyanate or polyisocyanate.

A method for reducing swelling in wood upon application of a water-dispersed coating composition comprising addition to the coating composition prior to application of a polyurethane compound which is the product of the reation of 1) at least one diisocyanate, or polyisocyanate or a mixture of polyisocyanates containing at least three isocyanate groups per molecule, (2) at least one fluorochemical compound containing at least one Zerewitinoff hydrogen in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate, (3) at least one compound of the formula R.sub.10 --(R.sub.2).sub.k --YH in an amount sufficient to react with 5% to 80% of the isocyanate groups in the diisocyanate or polyisocyanate and wherein R.sub.10 is a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 omega-alkenyl radical, or C.sub.2 -C.sub.18 omega-alkenoyl;

• R.sub.2 is --C.sub.n H.sub.2 n-- optionally end-capped with --›OCH.sub.2 C(R.sub.4)H!.sub.p --, --›OCH.sub.2 C(CH.sub.2 Cl)H!p--, or --C(R.sub.5)(R.sub.6)(OCH.sub.2 C›CH.sub.2 Cl!H).sub.p --, wherein R.sub.4, R.sub.5, and R.sub.6 are the same or different and are H or a C.sub.1 -C.sub.6 alkyl radical, n is 0 to 12, p is 1 to 50;
• Y is O, S, or N(R.sub.7) wherein R.sub.7 is H or C.sub.1 -C.sub.6 alkyl;
• and k is 0 or 1;
• and optionally (4) water in an amount sufficient to react with 5% to 60% of the isocyanate groups in the diisocyanate or polyisocyanate.