Abstract: The present invention relates to epoxy curing agent compositions comprising naphthol and naphthol derivatives in combination with at least one polyamine having three or more active amine hydrogens, and use of these curing agents as hardener for epoxy resins. These curing agent compositions may be used to cure, harden and/or crosslink an epoxy resin.

Abstract: The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate; (B) a polyaspartic ester; and (C) an aspartic ester. The polyaspartic ester (B) is represented by the structure below: where Z=a cycloalkyl, alkyl or aryl group, R1, R2=alkyl groups containing 1-10 carbon atoms; and n=2-4. The aspartic ester (C) is derived from a secondary heterocyclic amine in a 3-7 membered ring compound bearing at least one secondary amine functionality. This invention also relates to use of a polyurea coating composition comprising (A)-(C) for the preparation of a polyurea coating. This invention further relates to a process for preparing a polyaspartic/aspartic ester mixture in-situ by initially reacting an ester of fumaric acid or maleic acid with a polyamine and then reacting the unreacted ester of fumaric acid or maleic acid to completion with a secondary heterocyclic amine.

Abstract: The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate: (B) a polyaspartic ester; and (C) a 2-substituted butanedioic acid ester prepared by reacting the fumaric ester in the polyaspartic acid ester solution with a cyanoacetate, a malononitrile or a 1,3-diketone in the presence of a base.

Abstract: The present disclosure provides for latent curing accelerators as well as compositions containing such a latent curing accelerator with a substance to be cured (e.g., an epoxy resin). The latent curing accelerators comprise a urea compound and an encapsulant system having a polyphenol resin and/or at least one additional excipient. Methods of making and use are further provided.

Abstract: The present disclosure provides for latent curing accelerators as well as compositions containing such a latent curing accelerator with a substance to be cured (e.g., an epoxy resin). The latent curing accelerators comprise an amine and an encapsulant system having a polyphenol resin with at least one additional excipient. Methods of making and use are further provided.

Abstract: The present disclosure provides for latent curing accelerators as well as compositions containing such a latent curing accelerator with a substance to be cured (e.g., an epoxy resin). The latent curing accelerators comprise an amine and an encapsulant system having at least one additional excipient selected from a functional component and/or a non-functional component. Methods of making and use are further provided.

Abstract: The present invention relates to a new curing agent composition and coating composition. The coating composition solves problems with conventional coatings by providing a silane modified aliphatic polyurea coating that improves performance including longer open time and pot-life with fast drying, faster hardness development, improved adhesion to epoxy and other polyurea coatings, and improved chemical resistance. The coating composition is comprised of at least one polyisocyanate resin, and a composition comprising an isocyanate reactive agent containing at least one secondary diamine, at least one silane component and optionally at least one viscosity modifier.

Abstract: Polycarbamide coating compositions and secondary diamine curing agents used to produce the coating compositions are disclosed. Curing agent compositions comprising: (a) the reaction product of bis(4-aminocyclohexyl) methane and ethyl ester of 2-butendioc acid; and (b) the reaction product of bis(4-amino-3-methylcyclohexyl)methane and ethyl ester of 2-butendioic acid; and (c) at least one polyol are also disclosed. One aspect of the disclosure relates to a non-aqueous coating composition comprising the disclosed amine curing agents with a polyisocyanate resin. The coating compositions are suitable for use as direct to metal coatings or top coats. Methods of producing the curing agents and the coating compositions are also disclosed.

Abstract: The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate; (B) a polyaspartic ester; and (C) an aspartic ester. The polyaspartic ester (B) is represented by the structure below: where Z=a cycloalkyl, alkyl or aryl group, R1, R2=alkyl groups containing 1-10 carbon atoms; and n=2-4. The aspartic ester (C) is derived from a secondary heterocyclic amine in a 3-7 membered ring compound bearing at least one secondary amine functionality. This invention also relates to use of a polyurea coating composition comprising (A)-(C) for the preparation of a polyurea coating. This invention further relates to a process for preparing a polyaspartic/aspartic ester mixture in-situ by initially reacting an ester of fumaric acid or maleic acid with a polyamine and then reacting the unreacted ester of fumaric acid or maleic acid to completion with a secondary heterocyclic amine.

Abstract: The present invention relates to epoxy curing agents which are obtained from the reaction of a polyalkylene polyether modified polyepoxide resin and a polyamine component. They polyamine component is a reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms, for example, diethylenetriamine (DETA), and at least one aldehyde having 1 to 8 carbon atoms, for example, formaldehyde. The epoxy curing agent may be used as part of a two component coating system in the curing of liquid or pre-dispersed curable epoxy resins.

Abstract: Polycarbamide coating compositions and secondary diamine curing agents used to produce the coating compositions are disclosed. Curing agent compositions comprising: (a) the reaction product of bis(4-aminocyclohexyl) methane and ethyl ester of 2-butendioc acid; and (b) the reaction product of bis(4-amino-3-methylcyclohexyl)methane and ethyl ester of 2-butendioic acid; and (c) at least one polyol are also disclosed. One aspect of the disclosure relates to a non-aqueous coating composition comprising the disclosed amine curing agents with a polyisocyanate resin. The coating compositions are suitable for use as direct to metal coatings or top coats. Methods of producing the curing agents and the coating compositions are also disclosed.

Abstract: The present invention relates to epoxy curing agents which are obtained from the reaction of a polyalkylene polyether modified polyepoxide resin and a polyamine component. They polyamine component is a reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms, for example, diethylenetriamine (DETA), and at least one aldehyde having 1 to 8 carbon atoms, for example, formaldehyde. The epoxy curing agent may be used as part of a two component coating system in the curing of liquid or pre-dispersed curable epoxy resins.

Abstract: An electro-optic display comprises a layer of solid electro-optic material; a backplane comprising at least one electrode; and an adhesive layer disposed between the layer of electro-optic material and the backplane and adhesively securing the layer of electro-optic material to the backplane, the adhesive layer comprising a thermally-activated cross-linking agent comprising an epoxidized vegetable oil fatty acid or an epoxidized ester of such a fatty acid. The cross-linking agent reduces void growth when the display is subjected to temperature changes.

Abstract: An electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between these substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and an additive selected from a salt, a polyelectrolyte, a polymer electrolyte, a solid electrolyte, a conductive metal powder, a ferrofluid, a non-reactive solvent, a conductive organic compound, and combinations thereof. In one aspect, there is provided an adhesive comprising a mixture of a polymeric adhesive material and an additive selected from a salt, a polyelectrolyte, a polymer electrolyte, a solid electrolyte, and combinations thereof.

Abstract: Aqueous polyurethane dispersions comprising polyurethane polymer and methods for making and using same are disclosed herein. In one aspect of the present invention, aqueous polyurethane dispersions, comprising a polyurethane polymer having a weight average molecular weight ranging from 20,000 to 80,000, are prepared by controlling the weight average molecular weight of the polymer by reacting the isocyanate terminated prepolymer with at least one chain terminating agent; and/or maintaining a N/COOH molar ratio of amine in the neutralizing agent to acid functional group in the isocyanate reactive compound to from about 0.5:1 to about 1:1.

Abstract: An electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between these substrates, the adhesive layer comprising a mixture of a polymeric adhesive material and an additive selected from a salt, a polyelectrolyte, a polymer electrolyte, a solid electrolyte, a conductive metal powder, a ferrofluid, a non-reactive solvent, a conductive organic compound, and combinations thereof. The additive enables the volume resistivity of the adhesive layer to be controlled. Also, in an encapsulated electrophoretic medium comprising capsules in a polymeric binder, the volume resistivity of the binder can be controlled in a similar manner.