Abstract:
The aromatic polyurethane elastomers of the present invention are particularly suited for methods of making objects in a mold cavity. The objects generally include an elastomeric layer formed from an aromatic polyurethane and a foam layer which is subsequently applied to the elastomer. The aromatic elastomer of the present invention lends itself to being precoated with an in-mold coating or being painted after demolding the resulting part.
Abstract:
A polyurethane coating is prepared on a substrate using a multi-component coating composition having a first component containing a polyisocyanate material, a second component containing a polymeric polyol, and a third component containing a compound having at least two hindered secondary amine groups by first determining the temperature at curing of the coating will take place and then combining the first and second components and, when the cure temperature is less than about 20° C., particularly less than about 10° C., also combining the third component to prepare a combined coating composition; then applying the combined coating composition to the substrate and curing the applied coating layer.
Abstract:
Extrusion die embodying a heated rear section, a cooled front section with a plurality of extrusion orifices therein, passage means extending through the heated rear section for feeding thermoplastic polymer melt to the orifices, means such as an air space insulating the cooled front section from the heated rear section, and thin-walled, melt-conducting ring gaskets bridging the space between said sections.
Abstract:
Highly heat insulated masonry building walls are made economically with required strength yet with less thickness and much less weight than a typical cavity wall by building up a masonry structure of limited thickness having the compressive strength but not all the lateral strength required; erecting metal reinforcing rods at intervals next to a side of the masonry structure; then attaching over it, as by strips of adhesive, preformed stiff panel sections made of a durable lightweight heat insulating material, e.g., of polystyrene foam, which form with the masonry structure separate vertical pockets enclosing the rod locations and shallow anticondensation cavities between them; and finally filling the pockets with a masonry binder such as grout and hardening the cast masses of binder about the rods to form in the pockets reinforcing ribs bound monolithically to the masonry structure. A new form of molded, mating insulating panel sections is provided for constructing the walls.