Abstract: A polyurethane prepolymer composition may include: (a) a polyurethane prepolymer comprising, as a reaction product, (a1) an excess of diisocyanate and (a2) a polyol; and (b) free diisocyanate monomer in a range of from more than 0 to less than 1.0 wt. %, based on total polyurethane prepolymer weight. The NCO content of the polyurethane prepolymer may be in a range of from 0.2 to 15 wt. %. The polyurethane prepolymer may include less than 75 wt. % of a 2:1 stoichiometric adduct of the diisocyanate and the polyol, based on the total polyurethane prepolymer weight. The polyol (a2) may include two polypropylene glycols with different molecular weights.

Abstract: A polyurethane prepolymer composition may include more than 0 wt. % and less than 1.0 wt. % free diisocyanate monomer. The polyurethane prepolymer may include less than 80 wt. % of a 2:1 stoichiometric adduct of diisocyanate and at least one polyol (perfect prepolymer). Curable compositions may include such polyurethane prepolymer compositions and the such polyurethane prepolymer compositions may be used as adhesives.

Abstract: A steel connector is embedded in the concrete wall panel when the wall is cast. A block-out forms a void in the wall panel and keeps the poured concrete from filling the inside of the steel connector during the casting process. The angle at which the base of the steel connector is disposed within the concrete wall panel provides the proper angle for a fastening bolt to be inserted through the steel connector and into the foundation. The fastening bolt passes the base of the steel connector into the concrete foundation to securely attach the wall panel to the foundation.

Abstract: 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.

Abstract: Rotational cast polyurethane composition prepared from a prepolymer composition comprising: a) an isocyanate-terminated polyurethane prepolymer; and b) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive, wherein the prepolymer comprises a product produce by the reaction of a polyol with an organic diisocyanate monomer comprising 4,4?-diisocyanato diphenylmethane (MDI), and which prepolymer comprises less than 1.0% by weight of free MDI monomer, based on the toal weight of the prepolymer, exhibits a range of enhanced physical properties compared to those obtained from prepolymers comprising a higher level of free MDI monomer.

Abstract: Blocked isocyanate terminated prepolymers with improved handling and processing properties are prepared from isocyanate terminated prepolymers with very low free isocyanate monomer content. The blocked prepolymers have lower melting points and/or viscosities compared to similar blocked isocyanate terminated having traditional, higher amounts of free isocyanate monomer. Curing compositions comprising the blocked prepolymers are prepared and cured to form polyurethane polymers with excellent properties.

Abstract: Polycarbonate based polyurethane prepolymers having a low amount of free isocyanate monomer with excellent handling and processing properties are prepared and used in the preparation of cast polyurethane polymers with excellent performance and handling properties.

Abstract: Rotational cast polyurethane composition prepared from a prepolymer composition comprising: a) an isocyanate-terminated polyurethane prepolymer; and b) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive, wherein the prepolymer comprises a product produce by the reaction of a polyol with an organic diisocyanate monomer comprising 4,4?-diisocyanato diphenylmethane (MDI), and which prepolymer comprises less than 1.0% by weight of free MDI monomer, based on the total weight of the prepolymer, exhibits a range of enhanced physical properties compared to those obtained from prepolymers comprising a higher level of free MDI monomer.

Abstract: Rotational cast polyurethane composition prepared from a prepolymer composition comprising: a) an isocyanate-terminated polyurethane prepolymer; and b) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive, wherein the prepolymer comprises a product produce by the reaction of a polyol with an organic diisocyanate monomer comprising 4,4?-diisocyanato diphenylmethane (MDI), and which prepolymer comprises less than 1.0% by weight of free MDI monomer, based on the total weight of the prepolymer, exhibits a range of enhanced physical properties compared to those obtained from prepolymers comprising a higher level of free MDI monomer.

Abstract: Rotational cast polyurethane composition prepared from a prepolymer composition comprising: a) an isocyanate-terminated polyurethane prepolymer; and b) a curative agent comprising i) a polyol; ii) an aromatic diamine; iii) a thixotropic aliphatic amine; and iv) a thixotropic colloidal additive, wherein the prepolymer comprises a product produce by the reaction of a polyol with an organic diisocyanate monomer comprising 4,4?-diisocyanato diphenylmethane (MDI), and which prepolymer comprises less than 1.0% by weight of free MDI monomer, based on the toal weight of the prepolymer, exhibits a range of enhanced physical properties compared to those obtained from prepolymers comprising a higher level of free MDI monomer.

Abstract: This invention relates to a container (1) for waste material comprising wall portions (4, 6, 7) defining an internal void space and at least one opening (21) through which waste material may be inserted and/or withdrawn from said void space, wherein a roller shutter (22) is provided which is movable from an extended position in which the opening is closed by the roller shutter to a retracted position in which the opening is substantially unobstructed, the roller shutter being wound onto a barrel arrangement (26) as it is retracted, wherein in the retracted position that portion of the roller shutter wound onto the barrel arrangement is located within the internal void space of the container defined by the wall portions.

Abstract: Resettable circuit interrupting devices, such as GFCI devices, that include neutral fault test simulation

Abstract: This invention relates to a container (1) for waste material comprising wall portions (4, 6, 7) defining an internal void space and at least one opening (21) through which waste material may be inserted and/or withdrawn from said void space, wherein a roller shutter (22) is provided which is movable from an extended position in which the opening is closed by the roller shutter to a retracted position in which the opening is substantially unobstructed, the roller shutter being wound onto a barrel arrangement (26) as it is retracted, wherein in the retracted position that portion of the roller shutter wound onto the barrel arrangement is located within the internal void space of the container defined by the wall portions.

Abstract: A kit for providing temporary radiator repair comprising at least one laminate patch and at least one radiator clamp capable of forcibly holding the composite patch to tank portions, such as on the top or sides of the radiator, and at least one load distribution bar for more even distributing the compression force on the top of the radiator.