Methods for producing proppants with a fluorinated polyurethane proppant coating are provided. The methods include coating the proppant particles with a strengthening agent, a strengthening agent, and a resin to produce proppants with fluorinated polyurethane proppant coating. Additionally, a proppant comprising a proppant particle and a fluorinated polyurethane proppant coating is provided. The fluorinated polyurethane proppant coating includes a strengthening agent, a strengthening agent, and a resin. The fluorinated polyurethane proppant coating coats the proppant particle. Additionally, a method for increasing a rate of hydrocarbon production from a subsurface formation through the use of the proppants is provided.

The present invention relates to an aqueous, solids-containing dipping bath composition for treating reinforcing inserts for rubber products comprising the following components or consisting of these components, (A) at least one blocked MDI mixture, the MDI mixture comprising MDI oligomers of formula (I), n being a whole number from 1 to 8, and MDI monomers; (B) at least one resorcinol-formaldehyde latex; and (C) possibly at least one additive, wherein the dipping bath composition is essentially free of epoxides. ##STR00001##

Binders, resinated furnishes, and methods for making composite lignocellulose products therefrom. The binder can include about 70 wt % to about 99.7 wt % of an aldehyde-based resin, about 0.3 wt % to about 30 wt % of an isocyanate-based resin, about 10 wt % to about 63 wt % of an extender, and about 145 wt % to about 230 wt % of water, where all weight percent values are based on a combined solids weight of the aldehyde-based resin and the isocyanate-based resin. The binder has a long pot life and can be used with lignocellulose substrates having a water content of 10 wt % or more.

Described is a phenolic resin composition for use in the polyurethane cold-box and/or no-bake process. The phenolic resin composition comprises an ortho-condensed phenolic resol having etherified and/or free methylol groups in a total amount of 40 to 60% by weight based on the total mass of the phenolic resin composition, free formaldehyde in an amount of less than 0.1% by weight based on the total weight of the phenolic resin composition, one or more reaction products of formaldehyde with one or more CH-acidic reactant compounds, other constituents in a total amount of at least 38% by weight, wherein the amount of water in the phenolic resin composition is not more than 1.0% by weight in each case based on the total mass of the phenolic resin composition. Also described is a two-component binder system for use in the polyurethane cold-box and/or no-bake process, a use of a CH-acidic compound as a formaldehyde scavenger for producing a phenolic resin composition for use in the polyurethane cold-box and/or no-bake process, a process for producing a phenolic resin composition, a process for producing a two-component binder system and a process for producing a feeder, a foundry mold or a foundry core from a molding material mixture and finally corresponding feeders, foundry molds and foundry cores.

Defects can arise in a product of a metal casting process from reactions occurring at a metal-mold interface. A method that reduces the defects uses an organic binder system by introducing a separate third component to a two-part polyurethane-based binder system used in the cold box or no bake process. The third part is added only after the first two parts are mixed with a refractory molding material to provide a shapeable foundry mix. The third part is an alkyl silicate, such as tetraethyl orthosilicate (TEOS), an alkyl orthoformate, such as trimethyl orthoformate (TMOF) or triethyl orthoformate (TEOF), or combinations thereof.

The object of the invention is a component system for producing a binder for metal casting on the basis of phenolic resins of the benzyl ether type and isocyanates containing non-polar solvents.

The invention relates to a method for the layerwise construction of bodies comprising at least one novolac in a solid, free-flowing form; an isocyanate component and a first solvent as a liquid component to be printed, wherein the solvent according to a preferred embodiment of the invention also has a catalyst dissolved in the first solvent; a corresponding construction material mixture; a component system for producing the bodies by means of 3-D printing; and three-dimensional bodies produced according to this method in the form of molds and cores for metal casting.

A urethane composition useful in a variety of applications such as, for example, as a direct-to-metal coating, i.e. a coating composition that can be applied directly to the surface of a metal substrate without a primer or pretreatment is described. The coating composition preferably includes a polyol that is the reaction product of a resin of general formula (I) with an acid or a diol respectively, with the reaction being carried out in the presence of a catalyst. The coating composition also includes an isocyanate-functional compound as a crosslinker. The coating composition forms a corrosion-resistant film when applied directly to the substrate surface without a pretreatment or primer.

The present invention relates to an aqueous, solids-containing dipping bath composition for treating reinforcing inserts for rubber products comprising the following components or consisting of these components, (A) at least one blocked MDI mixture, the MDI mixture comprising MDI oligomers of formula (I), n being a whole number from 1 to 8, and MDI monomers; (B) at least one resorcinol-formaldehyde latex; and (C) possibly at least one additive, wherein the dipping bath composition is essentially free of epoxides.

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A phase-separated polymeric composition is provided that comprises a first phase including polyurethane domains and a second phase including a butyl rubber matrix. A method is also provided for producing a polymer composition. The method includes providing a masterbatch composition that is prepared by combining a halogenated butyl rubber with at least one phenolic resin, introducing the masterbatch composition to a reactor, introducing to the reactor an isocyanate and a polyurethane catalyst to form a blend, and subjecting the blend to conditions sufficient to form a polyurethane.