The invention relates to polyphenyl polymethylene polyisocyanates having an NCO number of at least 29% comprising less than 2% by weight ureas, less than 8% by weight carbodiimides or uretonimines and less than 1000 ppm organic chlorine compounds.

The polyphenyl polymethylene polyisocyanates can be prepared according to the invention by reacting (i) polyphenyl polymethylene polyamines with organic carbonates to give the corresponding polyphenyl polymethylene polycarbamates, (ii) by thermally cleaving the polyphenyl polymethylene polycarbamates to give the polyphenyl polymethylene polyisocyanates,
wherein, prior to the thermal cleavage, the free amino groups or urea groups present in the carhamate crude mixture comprising the polyphenyl polymethylene polycarbamates are reacted with a derivatizing reagent to give amide groups or urethane groups.

The polyphenyl polymethylene polyisocyanates can further be prepared according to the invention, prior to the thermal cleavage, by removing compounds having free amino groups or urea groups present in the carbamate crude mixture from the carbamate crude mixture by filtration of the carbamate crude mixture comprising the polyphenyl polymethylene polycarbamates over a solid acidic adsorbent in the presence of an acid dissolved in the carbamate crude mixture.

The invention relates to curable coating compositions containing at least one surface modifying amphiphilic additive; and at least one siloxane-polyurethane coating composition. The invention also relates to methods of making and using the curable coating compositions of the invention. The invention also relates to objects coated with the curable coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the steps of coating the surface with the curable coating composition of the invention to form a coated surface, and curing the coating composition on the coated surface. The invention also relates to a marine fouling-release coating containing the curable coating composition of the invention.

The present invention relates to the use of metal salts of polymeric alcohols as storage-stable thermolatent catalysts for the manufacture of isocyanurate and polyisocyanate polymers.

Polyurethanes and hot melt moisture curable adhesive compositions that include the same are disclosed. The polyurethane includes the reaction product of diisocyanate and a semi-crystalline polyester polyol having an acid number of less than 4 and including the reaction product of a saturated fatty component having a hydroxyl number less than 2, the saturated fatty component being selected from the group consisting of saturated fatty acid, saturated fatty acid ester, saturated oil, and combinations thereof, a polyhydric alcohol that includes at least three hydroxyl groups, and a dibasic acid.

The present invention relates to a polyurethane prepolymer composition comprising more than 0 wt. % and less than 1.0 wt. % free diisocyanate monomer wherein the polyurethane prepolymer comprises less than 80 wt. % of a 2:1 stoichiometric adduct of diisocyanate and at least one polyol (perfect prepolymer), curable compositions comprising these polyurethane prepolymer compositions and the use of these polyurethane prepolymer compositions as adhesives.

A method for producing a foam, wherein polyol and an isocyanate are combined in a mold, and wherein an additive of biological matter and/or waste materials is added at the same time, before, or after, wherein the additive is pretreated.

Polyurethane foam-forming compositions, methods of producing polyurethane foams, polyurethane foams produced from such compositions made by such methods, as well as isocyanate-reactive compositions. The polyurethane foam-forming compositions include a polyol blend, a blowing agent composition, and a polyisocyanate. The polyol blend includes an aromatic amine-initiated polyether polyol, a saccharide-initiated polyether polyol, and an aromatic polyester polyol and has a content of —C.sub.2H.sub.4O— units of 3 to 6% by weight, based on the total weight of the polyurethane foam-forming composition. The blowing agent composition includes a hydrochlorofluoroolefin and a carbon dioxide-generating chemical blowing agent.

Soy-based high temperature products, or thermoset resins, are produced by solvent free polymerization of soy polyols and polyisocyanates at room temperature. The ratio of isocyanate equivalents to polyol equivalent used in the synthesis is greater than or equal to 3. The invented soy-based products are polyisocyanurate solid materials with excellent stability at high temperature. Heat resistance of the material is influenced by ratio of soy polyol and polyisocyanate.

A film capacitor that includes a dielectric resin film containing a cured product of a first organic material and a second organic material; and a metal layer on at least one surface of the dielectric resin film. The first organic material contains an organic polymer having a hydroxy group and a benzene ring in a repeating unit; the second organic material contains 4,4′-diphenylmethane diisocyanate, a modified product of 4,4′-diphenylmethane diisocyanate, or a mixture thereof; and 400 ppm to 700 ppm of chlorine ions and 300 ppm to 500 ppm of phosphorus ions are present inside the dielectric resin film.

A material for medical use, which contains nanofibers that are formed from a resin containing a silicone-modified polyurethane resin, and which is characterized in that: the silicone-modified polyurethane resin is a reaction product of (A) a long-chain polyol that has a number average molecular weight of 500 or more, (B) a short-chain polyol that has a number average molecular weight of less than 500, (C) an active hydrogen group-containing organopolysiloxane and (D) a polyisocyanate; and the average fiber diameter thereof is less than 2,000 nm. This material for medical use exhibits excellent performance in a biological test.