Abstract: A system for establishing a fluid path between a plurality of tubes includes a manifold and a plurality of caps. The manifold defines an internal cavity and a plurality of orifices that access the cavity. Each of the plurality of caps are secured to an end of a respective tube of the plurality of tubes. Each cap defines a central orifice that is in fluid communication with the respective tube. Each cap has a tapered protrusion extending away from the end of the respective tube. The caps are disposed within the internal cavity such that the respective tube extends through a respective orifice of the plurality of orifices and outward from the manifold. The tapered protrusions of adjacent caps interact with each other to position each cap to form a seal with other caps having a central orifice such that the central orifices are in fluid communication with each other.

Abstract: Photocurable millable polyurethane gum compositions contain a millable polyurethane gum having ethylenic unsaturation, photocatalyst, and a low molecular weight crosslinker containing minimally two ethylenically unsaturated groups. The compositions can be used to continuously extrude profiles which retain their shape.

Abstract: Sprayable polyurethane compositions contain particulate filler in both polyol and isocyanate components for a total content of minimally 20 weight percent of particulate filler. The isocyanate component is stable with respect to storage, and composite structures prepared therefrom exhibit high modulus and can be used as replacements for unsaturated polyester systems.

Abstract: Sprayable polyurethane compositions contain particulate filler in both polyol and isocyanate components for a total content of minimally 30 weight percent of particulate filler and fibrous reinforcement. The isocyanate component is stable with respect to storage, and composite structures prepared therefrom exhibit high modulus and can be used as replacements for unsaturated polyester systems. Resin transfer molding systems employ the same components and produce molded parts with good physical properties.

Abstract: Sprayable polyurethane compositions contain particulate filler in both polyol and isocyanate components for a total content of minimally 30 weight percent of particulate filler and fibrous reinforcement. The isocyanate component is stable with respect to storage, and composite structures prepared therefrom exhibit high modulus and can be used as replacements for unsaturated polyester systems. Resin transfer molding systems employ the same components and produce molded parts with good physical properties.

Abstract: A two roll impregnator for impregnating fiber reinforcement for use in filament winding operatives contains two abutting rolls, at least one and preferably both having an elastomeric surface. Resin is constrained within a bath whose lower surfaces are defined by the abutting rollers and side dams. Fiber reinforcement is drawn over a first roller through the resin bath and between the closed nip of the abutting rollers, where full impregnation is fostered, excess resin removed, and the impregnated fiber degassed. Substantially dripless operation can be maintained.

Abstract: Highly damage resistant fiber reinforced composites are prepared from polyurethane systems employing a highly hydrophobic polyol component and an isocyanate prepolymer, the combination having a combined functionality greater than 5. The polyurethane systems may be used for gel coats and matrix resins, and produce substantially no volatile emissions. The systems are particularly useful for boat hulls and like products.

Abstract: The reaction product is derived from a composition containing one of seven silanes; dimethyldiethoxysilane, methyldiethoxysilane, dimethyldimethoxysilane, diphenyldimethoxysilane, trimethylmethoxysilane, trimethylethoxysilane, or aminopropyltriethoxysilane, a multi-functional polydimethyl siloxane emulsified polymer, a compatible surfactant, ethanol and a majority component of water. In the method, the reaction product is applied to a heated surface of a mold core to create a semi-permanent coating to facilitate multiple releases of molded parts. If not heated, the mold core must be dried to remove water.

Abstract: Polyurethane rubbers are disclosed vulcanizable by peroxide and/or sulphur, the vulcanized rubber having improved low temperature compression set properties and low gas permeability. The vulcanizable polyurethane rubbers are made by mixing(A) 1.0 mol of polyester glycol having a molecular weight of 1500 to 7000 consisting of adipic acid and 2-methylpropanediol-1,3 in combination with cyclohexyldimethanol and/or propanediol. The mol ratio of methylpropanediol to cyclohexyldimethanol and/or propanediol can vary from 70 to 30 to 30 to 70%.(B) 0 to 2.5 mols of a diol having a molecular wright of 60 to 200; and(C) 0.95 to 3.5 mols of diisocyanate with a molar ratio of isocyanate group in (C) to the isocyanate-reactive groups in (A) and (B) of 0.95 to 1.02.

Abstract: An aqueous reaction mixture having a pH of 4.5 to 5.5 of a methyl terminated siloxane emulsified polymer, a methyl triethoxysilane, a mixture of nonyl and octyl phenol derivative surfactants, fluorinated alkyl ester surfactant and synthetic ethoxylated amine surfactants, a silanol terminated polydimethylsiloxane hydroxyl terminated polybutadiene and ethanol. The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twelve times prior to recoating.

Abstract: An aqueous reaction mixture having a pH of 4.5 to 5.5 of a multi-functional polydimethyl siloxane emulsified polymer, a methyl triethoxy silane, a mixture of substituted nonyl and octyl phenol derivative surfactants, non-ionic fluorinated alkyl ester surfactant and synthetic ethoxylated amine surfactants, a silanol terminated polydimethyl siloxane and ethanol. The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twenty times prior to recoating.

Abstract: An aqueous reaction mixture of a multi-functional polydimethyl siloxane emulsified polymer, a methyl triethoxy silane, a mixture of substituted nonyl or octyl phenol derivative surfactants and synthetic ethoxylated amine surfactants, and ethanol. The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twenty times prior to recoating.