Abstract: HVAC and building and construction components are molded from novel compositions that meet the flame spread and smoke index, and the molding, safety, strength, and aesthetic requirements for this use. In a further embodiment, these compounds also promote better indoor air quality by inhibiting the growth of microbial contaminants within and on the surface of products molded therefrom. These compounds are based on thermoset resin, e.g. a polyester resin which preferably can comprise a polypropylene glycol dicyclopentadiene copolymerized with maleic anhydride, a low profile additive and hydroxy ethyl methacrylate monomer with additional additives including an appropriate catalyst package, a mold release agent, a thickening agent, a loading of aluminum hydroxide which is from about 40 to 65% by weight, having a loading of glass fibers of from about 10 to about 25% and preferably containing a silver ion containing antimicrobial agent, such as soluble glass containing silver ions.

Abstract: HVAC and building and construction components are molded from novel compositions that meet the flame spread and smoke index, and the molding, safety, strength, and aesthetic requirements for this use. In a further embodiment, these compounds also promote better indoor air quality by inhibiting the growth of microbial contaminants within and on the surface of products molded therefrom. These compounds are based on thermoset resin, e.g. a polyester resin which preferably can comprise a polypropylene glycol dicyclopentadiene copolymerized with maleic anhydride, a low profile additive and hydroxy ethyl methacrylate monomer with additional additives including an appropriate catalyst package, a mold release agent, a thickening agent, a loading of aluminum hydroxide which is from about 40 to 65% by weight, having a loading of glass fibers of from about 10 to about 25% and preferably containing a silver ion containing antimicrobial agent, such as soluble glass containing silver ions.

Abstract: The invention provides blower housings for air handlers and hot air furnaces which are made from molding compounds that allow for wide flexibility in molding complex configurations so as to improve blower efficiency, which improve manufacturing efficiency and safety and provide suitable mechanical properties, safety in use, and sound dampening. These compounds are generally liquid thermosetting molding resins which comprise a thermoset resin matrix such as a isophthalate polyester having a specific loading of glass reinforcing fibers. The compositions also include flame retardant additives. They are further formulated to meet the desired molding characteristics; to withstand the operating temperatures to which they will be exposed; and to have a predetermined strength and a desirable user interface including appearance, and odor. Typically, the compounds will have a glass transition temperature from about 160° C. (320° F.) to about 185° C. (365° F.).