An alternative polyurethane composition is provided which comprises a reaction product of an azidated polyol and a poly(alkynyl carbamate) prepolymer, wherein reaction occurs at a temperature of from 20° C. to 200° C., optionally in the presence of a Cu.sup.I-containing catalyst and wherein the poly(alkynyl carbamate) prepolymer comprises a reaction product of a polyisocyanate, an alkynol, and a glycol ether, wherein from 1 mol % to 33 mol % of isocyanate groups are reacted with glycol ether and the remaining isocyanate groups are reacted with the alkynol. The inclusion of glycol ethers into the polyisocyanate chain of the poly(alkynyl carbamate) prepolymer at a level of from 1 mol % to 33 mol %, is efficient in reducing the viscosity of the composition without compromising its performance in coatings, adhesives, sealants, films, elastomers, castings, foams, and composites made with the inventive alternative polyurethane compositions.

An alternative polyurethane composition is provided which comprises a reaction product of an azidated polyol and a poly(alkynyl carbamate) prepolymer, wherein reaction occurs at a temperature of from 20° C. to 200° C., optionally in the presence of a Cu.sup.I-containing catalyst and wherein the poly(alkynyl carbamate) prepolymer comprises a reaction product of a polyisocyanate, an alkynol, and a glycol ether, wherein from 1 mol % to 33 mol % of isocyanate groups are reacted with glycol ether and the remaining isocyanate groups are reacted with the alkynol. The inclusion of glycol ethers into the polyisocyanate chain of the poly(alkynyl carbamate) prepolymer at a level of from 1 mol % to 33 mol %, is efficient in reducing the viscosity of the composition without compromising its performance in coatings, adhesives, sealants, films, elastomers, castings, foams, and composites made with the inventive alternative polyurethane compositions.

An anti-tarnish composition including a polymer resin; a photoinitiator; a coating thickness adjusting agent; and optionally a dye useful for protecting metal substrates from tarnishing and methods of applying the anti-tarnish composition to metal substrates using an electroplating method. The anti-tarnish composition can be selectively applied to the metal surfaces of jewelry containing gemstones.

An anti-tarnish composition including a polymer resin; a photoinitiator; a coating thickness adjusting agent; and optionally a dye useful for protecting metal substrates from tarnishing and methods of applying the anti-tarnish composition to metal substrates using an electroplating method. The anti-tarnish composition can be selectively applied to the metal surfaces of jewelry containing gemstones.

An object of the present invention is to provide an aqueous coating composition that has good coating workability and affords good finished appearance. The present invention relates to an aqueous coating composition comprising an aqueous base component (I) and a water-dispersible curing agent (II), wherein the aqueous base component (I) comprises an aqueous hydroxy group-containing resin dispersion (A), wherein the water-dispersible curing agent (II) comprises a water-dispersible polyisocyanate (B), and wherein the aqueous hydroxy group-containing resin dispersion (A) comprises an acrylic resin dispersion (A1), and an emulsion of an acrylic resin having a hydrophobic linear alkyl, branched alkyl, or alicyclic alkyl group with 4 to 6 carbon atoms (A2).

An object of the present invention is to provide an aqueous coating composition that has good coating workability and affords good finished appearance. The present invention relates to an aqueous coating composition comprising an aqueous base component (I) and a water-dispersible curing agent (II), wherein the aqueous base component (I) comprises an aqueous hydroxy group-containing resin dispersion (A), wherein the water-dispersible curing agent (II) comprises a water-dispersible polyisocyanate (B), and wherein the aqueous hydroxy group-containing resin dispersion (A) comprises an acrylic resin dispersion (A1), and an emulsion of an acrylic resin having a hydrophobic linear alkyl, branched alkyl, or alicyclic alkyl group with 4 to 6 carbon atoms (A2).

A curative free sealant composition for sealing joints between male and female parts, the sealant composition comprising a solid resin component, a solid (meth)acrylate polyurethane component, and an ethoxylated bisphenol-A (meth)acrylate component.

A curative free sealant composition for sealing joints between male and female parts, the sealant composition comprising a solid resin component, a solid (meth)acrylate polyurethane component, and an ethoxylated bisphenol-A (meth)acrylate component.

The present application is directed to a two-component waterborne polyurethane coating composition including: a film-forming resin composition, comprising an aqueous dispersion of hydroxyl acrylic polymer particles with a core-shell structure; and a polyisocyanate crosslinker, wherein the hydroxyl acrylic polymer particles with a core-shell structure includes a shell formed by a copolymer A and an inner core formed by a copolymer B; and wherein the copolymer A has a glass transition temperature ranging from −20° C. to 60° C., the copolymer B has a glass transition temperature ranging from 20° C. to 100° C., and the hydroxyl acrylic polymer particles with a core-shell structure have a glass transition temperature ranging from 10° C. to 90° C. The present application also relates to a low gloss coating formed by the two-component waterborne polyurethane coating composition.

The present application is directed to a two-component waterborne polyurethane coating composition including: a film-forming resin composition, comprising an aqueous dispersion of hydroxyl acrylic polymer particles with a core-shell structure; and a polyisocyanate crosslinker, wherein the hydroxyl acrylic polymer particles with a core-shell structure includes a shell formed by a copolymer A and an inner core formed by a copolymer B; and wherein the copolymer A has a glass transition temperature ranging from −20° C. to 60° C., the copolymer B has a glass transition temperature ranging from 20° C. to 100° C., and the hydroxyl acrylic polymer particles with a core-shell structure have a glass transition temperature ranging from 10° C. to 90° C. The present application also relates to a low gloss coating formed by the two-component waterborne polyurethane coating composition.