Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.

Polymers are disclosed that incorporate portions of secondary or tertiary polyamide segments connected with polyisocyanates. These polymers have enhanced matting properties. The enhanced matting properties are from creating an inherently matt surface from the polymer without the use of any separate fine particle size matting additives. Conventional matting agents such as fine particle size silica usually results in loss of physical properties such as haze development and porosity in the coating from the matting agent. Composites and hybrids of these polymers and other polyamides, polyurethane with vinyl polymers (acrylates) are also disclosed and claimed.

Disclosed is a carboxy group-containing aqueous resin composition containing a carboxy group-containing aqueous resin and a polycarbodiimide compound (X) represented by the following general formula (1): ##STR00001##
wherein R.sup.1 represents a residue obtained by removing a functional group capable of reacting with an isocyanate from a hydrophilic compound having the functional group capable of reacting with an isocyanate; R.sup.2 represents a divalent residue obtained by removing isocyanate groups from a diisocyanate compound; R.sup.3 represents a divalent residue obtained by removing hydroxy groups from a glycol compound; X represents a group to be formed through a reaction between the hydrophilic compound and the diisocyanate compound; n1 represents a number of 1 to 10; n2 represents a number of 1 to 10; m represents a number of 1 to 5; and plural R.sup.1's may be the same or different and plural R.sup.2's may be the same or different.

Disclosed is a carboxy group-containing aqueous resin composition containing a carboxy group-containing aqueous resin and a polycarbodiimide compound (X) represented by the following general formula (1): ##STR00001##
wherein R.sup.1 represents a residue obtained by removing a functional group capable of reacting with an isocyanate from a hydrophilic compound having the functional group capable of reacting with an isocyanate; R.sup.2 represents a divalent residue obtained by removing isocyanate groups from a diisocyanate compound; R.sup.3 represents a divalent residue obtained by removing hydroxy groups from a glycol compound; X represents a group to be formed through a reaction between the hydrophilic compound and the diisocyanate compound; n1 represents a number of 1 to 10; n2 represents a number of 1 to 10; m represents a number of 1 to 5; and plural R.sup.1's may be the same or different and plural R.sup.2's may be the same or different.

Aqueous coating compositions include dispersed polyurethane-vinyl polymer hybrid particles obtained by free-radical polymerization of at least one vinyl monomer in the presence of a polyurethane. The polyurethane and the vinyl polymer in the hybrid particles are present in a weight ratio of polyurethane to vinyl polymer ranging from 1:1 to 20:1, and the polyurethane is the reaction product of at least the following components: (a) from 5 to 40 wt. % of at least one organic difunctional isocyanate, (b) from 0.5 to 4 wt. % of an isocyanate-reactive compound containing ionic or potentially ionic water-dispersing groups having a molecular weight of from 100 to 500 g/mol, (c) from 40 to 80 wt. % of at least one diol having a molecular weight from 500 to 5000, (d) from 0 to 10 wt. % of at least one active-hydrogen chain extending compound with a functionality of at least 2 other than water, (e) from 0 to 10 wt. % of at least one diol having a molecular weight below 500 g/mol. The isocyanate and hydroxy groups on the components used are present in a respective mole ratio (NCO to OH) in the range of from 0.8:1 to 5:1.

Aqueous coating compositions include dispersed polyurethane-vinyl polymer hybrid particles obtained by free-radical polymerization of at least one vinyl monomer in the presence of a polyurethane. The polyurethane and the vinyl polymer in the hybrid particles are present in a weight ratio of polyurethane to vinyl polymer ranging from 1:1 to 20:1, and the polyurethane is the reaction product of at least the following components: (a) from 5 to 40 wt. % of at least one organic difunctional isocyanate, (b) from 0.5 to 4 wt. % of an isocyanate-reactive compound containing ionic or potentially ionic water-dispersing groups having a molecular weight of from 100 to 500 g/mol, (c) from 40 to 80 wt. % of at least one diol having a molecular weight from 500 to 5000, (d) from 0 to 10 wt. % of at least one active-hydrogen chain extending compound with a functionality of at least 2 other than water, (e) from 0 to 10 wt. % of at least one diol having a molecular weight below 500 g/mol. The isocyanate and hydroxy groups on the components used are present in a respective mole ratio (NCO to OH) in the range of from 0.8:1 to 5:1.

A blocking agent dissociation catalyst for blocked isocyanates comprising a nitrogen-containing compound represented by Formula (1a): ##STR00001##
wherein D is represented by Formula (2): ##STR00002##
wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and a are as described in the specification.

The present invention provides a urethane resin composition including a urethane resin (A), an olefin resin (B), water (C), and a carbodiimide compound (D) having a carbodiimide equivalent of 340 or more. Also, the present invention provides a surface treatment agent including the urethane resin composition described above. Further, present invention provides an article including a layer formed of the surface treatment agent. The content of urethane bond in the urethane resin (A) is preferably within a range of 980 to 4,000 mmol/kg. The content of urea bond in the urethane resin (A) is preferably within a range of 315 to 850 mmol/kg.

The present invention provides a urethane resin composition including a urethane resin (A), an olefin resin (B), water (C), and a carbodiimide compound (D) having a carbodiimide equivalent of 340 or more. Also, the present invention provides a surface treatment agent including the urethane resin composition described above. Further, present invention provides an article including a layer formed of the surface treatment agent. The content of urethane bond in the urethane resin (A) is preferably within a range of 980 to 4,000 mmol/kg. The content of urea bond in the urethane resin (A) is preferably within a range of 315 to 850 mmol/kg.

A semicarbazide composition contains a semicarbazide compound (A1) derived from a hydrazine and an isocyanate compound (a1) having an isocyanate group, and a semicarbazide compound (B1) derived from a hydrazine and an isocyanate compound (b1) having an isocyanate group and having a different structure from the isocyanate compound (a1), wherein the absolute value of the difference in the solubility parameters of the isocyanate compound (a1) and the isocyanate compound (b1) is at least 0.15 but not more than 2.10. A method for producing a semicarbazide composition includes, in sequence, a step 2-1 of reacting a hydrazine and an isocyanate compound (a2) having at least one cyclic structure within the molecule to obtain a semicarbazide compound (A2), and a step 2-2 of reacting a hydrazine and an isocyanate compound (b2) not having a cyclic structure within the molecule to obtain a semicarbazide compound (B2).