Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I) ##STR00001##
wherein X represents an n-valent organic radical derived from a corresponding n-functional primary amine X(NH.sub.2).sub.n, R.sub.1 and R.sub.2 each independently represent an organic radical having no Zerevitinov active hydrogens and n represents an integer of at least 2; and (b) an isocyanate functional prepolymer having a residual monomer content of less than 1% by weight, the prepolymer prepared by reacting: (b1) an aliphatic isocyante; and (b2) a polyol component having a number average molecular weight of 400 g/mol and an average OH functionality of 2 to 6, wherein the polyol component comprises one or more constituents selected from the group consisting of polyester polyols, polyester-polyether polyols and mixtures thereof; processes for making the same; postoperative adhesions barriers prepared therewith and dispensing systems for such polyurea systems.

The present invention provides an anti-corrosion composition comprising an organic ion-exchanger; and a solventborne resin, wherein a substrate exposed to a halide-containing environment and having the anti-corrosion composition applied thereto has a reduced level of corrosion compared to the substrate exposed to the halide-containing environment without the anti-corrosion composition being applied. The inventive solventborne anti-corrosion composition may find use on substrates such as automotive vehicles, bridges, cranes, superstructures, offshore oil & gas rigs, pipes, tanks, ships, barges, boats, aircraft, concrete, and masonry that are exposed to halide-containing environments.

A two-component polyurethane composition containing at least 55% by weight of polybutadiene polyols based on the total amount of all polyols having an average molecular weight of at least 500 g/mol, and at least one latent hardener, where the ratio of the number of reactive groups in the latent hardener to the number of OH groups present is in the range from 0.02 to 0.4. The composition has a long open time, blister-free curing, a very low glass transition temperature, high elasticity and surprisingly high strength which is very constant over a wide temperature range. Furthermore, it has very good adhesion to metallic and nonmetallic substrates, causing barely any stress cracks on glassy thermoplastics.

The present invention relates to a method for bonding substrates of the same or different type using two-component structural adhesives on the basis of aliphatic polyisocyanates and polyaspartic acid esters, and to a two-component structural adhesive, which contains said two components and has a high strength when hardened.

Provided are one-part, shelf-stable polyurethane aerosol compositions, and related articles and methods. When sprayed onto a substrate and dried, these compositions provide polyurethane films. These polyurethane films display improved moisture resistance, optical clarity, and weatherability compared to known aerosol compositions, particularly in adverse environmental conditions. The compositions generally include an aqueous polyurethane dispersion containing a urethane moiety obtained by reacting (i) a polyol or thiol having isocyanate-reactive functional groups, (ii) a neutralized water-solubilizing compound, and (iii) a diisocyanate and optionally a silane terminal group; a propellant; and optionally one or more additives.

Provided are one-part, shelf-stable polyurethane aerosol compositions, and related articles and methods. When sprayed onto a substrate and dried, these compositions provide polyurethane films. These polyurethane films display improved moisture resistance, optical clarity, and weatherability compared to known aerosol compositions, particularly in adverse environmental conditions. The compositions generally include an aqueous polyurethane dispersion containing a urethane moiety obtained by reacting (i) a polyol or thiol having isocyanate-reactive functional groups, (ii) a neutralized water-solubilizing compound, and (iii) a diisocyanate and optionally a silane terminal group; a propellant; and optionally one or more additives.

This invention relates to a coating composition, a method for coating of a metallic substrate as well as the use of a chain-extended aspartate prepolymer for improving the early hardness of the coating composition and in a two-component coating composition.

A printing method includes applying a processing fluid to a recording medium and applying an ink to the recording medium, wherein the processing fluid contains a first nonionic resin including the following structure unit a-1, the first nonionic resin having a glass transition temperature of 15 degrees C. or lower, wherein the ink contains a second nonionic resin including the following structure unit a-1 and a coloring material

##STR00001##

A method of producing PUD by a solvent free process includes drying polyol in vacuum; placing the dried polyol and DMBA in a reaction vessel to mix until a first mixture becomes transparent; adding diisocyanate which having functional group of isocyanate(NCO) to the first mixture to react until NCO terminated first prepolymer is formed; decreasing temperature of the NCO terminated first prepolymer to 65 C.; adding a neutralizing agent to the NCO terminated first prepolymer until NCO terminated second prepolymer is formed; adding the remaining diisocyanate having isocyanate functional group to the NCO terminated second prepolymer to form a second mixture; adding deionized water to the second mixture to form prepolymer dispersion; and adding chain extension agent to the prepolymer dispersion to rotate at a range of 200 to 2,000 rpm for chain extension for 1-3 hours until solid content 40.0 wt. % solvent free PUD is produced.

A method of producing PUD by a solvent free process includes drying polyol in vacuum; placing the dried polyol and DMBA in a reaction vessel to mix until a first mixture becomes transparent; adding diisocyanate which having functional group of isocyanate(NCO) to the first mixture to react until NCO terminated first prepolymer is formed; decreasing temperature of the NCO terminated first prepolymer to 65 C.; adding a neutralizing agent to the NCO terminated first prepolymer until NCO terminated second prepolymer is formed; adding the remaining diisocyanate having isocyanate functional group to the NCO terminated second prepolymer to form a second mixture; adding deionized water to the second mixture to form prepolymer dispersion; and adding chain extension agent to the prepolymer dispersion to rotate at a range of 200 to 2,000 rpm for chain extension for 1-3 hours until solid content 40.0 wt. % solvent free PUD is produced.