US 12,742,035 B2 · Aqueous self-crosslinkable polyurethane dispersions

Abstract

The present invention relates to polyester polyols (1) carrying at least one keto-type C═O group derived from HO—C(═O)—L1-C(═O)—R1 (1i) or from a derivative thereof, wherein L1 is a linking group and R1 is selected from the group consisting of C1-20-alkyl, C5-8-cycloalkyl, C6-10-aryl and C7-20-aralkyl, to aqueous polyurethane dispersions (PUD) comprising at least one polyurethane (2) carrying at least one keto-type C═O group, water, and optionally at least one organic solvent (4), wherein the at least one polyurethane (2) carrying at least one keto-type C═O group comprises units derived from at least one polyester polyol (1), to aqueous self-crosslinkable polyurethane dispersions (SC-PUD) comprising at least one polyurethane (2) carrying at least one keto-type C═O group, at least one compound (3) carrying at least two keto-type C═O group reactive groups, water, and optionally at least one organic solvent (4), wherein the at least one polyurethane (2) carrying at least one keto-type C═O group comprises units derived from at least one polyester polyol (1), to aqueous self-crosslinkable polyurethane coating composition comprising the aqueous self-crosslinkable polyurethane dispersion (SC-PUD) optionally at least one organic solvent (5), at least one coating composition additive (6), optionally at least one polymer (7) different from the polyurethane (2), and optionally at least one monomer (8) carrying at least one olefinically unsaturated group, to substrate coated with the aqueous self-crosslinkable polyurethane coating composition, and to a process for coating the substrate with the aqueous self-crosslinkable polyurethane coating composition.

Claims13

Dependent claims

An aqueous polyurethane dispersion comprising

at least one polyurethane carrying at least one keto-type C═O group, and
optionally at least one organic solvent,
wherein the at least one polyurethane carrying at least one keto-type C═O group comprises units derived from at least one polyester polyol comprising units derived from
5 to 50 weight % of HO—C(═O)-L1-C(═O)—R1 (1i) or derivative thereof, wherein L1 is a linking group and R1 is selected from the group consisting of C1-20-alkyl, C5-8-cycloalkyl, C6-10-aryl and C7-20-aralkyl,
5 to 60 weight % of at least one diacid (ii) or derivative thereof,
0 to 30 weight % of at least one polyacid (1iii) carrying at least three COOH groups or derivative thereof,
5 to 50 weight % of at least one diol (1iv),
5 to 50 weight % of at least one polyol (1v) carrying at least three OH groups and
0 to 20 weight % of at least compound (1vi) comprising at least one epoxy group, based on the weight of the sum of (1i), (1ii), (1iii), (1iv) (1v) and (1vi).

6 more elements

An aqueous self-crosslinkable polyurethane dispersion comprising

at least one polyurethane (2) carrying at least one keto-type C═O group,
at least one compound (3) carrying at least two keto-type C═O group reactive groups, water, and
optionally at least one organic solvent,
wherein the at least one polyurethane carrying at least one keto-type C═O group comprises units derived from at least one polyester polyol comprising units derived from
5 to 50 weight % of HO—C(═O)-L1-C(═O)—R1 (1i) or derivative thereof, wherein L1 is a linking group and R1 is selected from the group consisting of C1-20-alkyl, C5-8-cycloalkyl, C6-10-aryl and C7-20-aralkyl,
5 to 60 weight % of at least one diacid (1ii) or derivative thereof,
0 to 30 weight % of at least one polyacid (1iii) carrying at least three COOH groups or derivative thereof,
5 to 50 weight % of at least one diol (1iv),
5 to 50 weight % of at least one polyol (1v) carrying at least three OH groups and
0 to 20 weight % of at least compound (1vi) comprising at least one epoxy group, based on the weight of the sum of (1i), (1ii), (1iii), (1iv) (1v) and (1vi).

7 more elements

Dependencies are inferred from the claim text.

Aqueous self-crosslinkable polyurethane dispersions

Life of this patent

Aqueous self-crosslinkable polyurethane dispersions

Life of this patent

Abstract

Claims13