| 摘要 |
<p>Polyester articles having improved flame-retardant properties are prepared by curing a polymerizable molding composition comprised of an unsaturated polyester, a vinyl monomer that is copolymerizable with the polyester, a finely divided inorganic filler material, and a halogenated vinyl copolymer. The unsaturated polyester is halogenated although it may be mixed with non-halogenated polyester, the filler is preferably hydrated alumina, and the halogenated vinyl copolymer is selected from those that are soluble in the monomer, that are at least partially immiscible and incompatible with the polyester, and that have functional groups, preferably acid or epoxy functionality. Reinforcing materials, such as glass fibers, as well as other materials generally included in polymerizable polyester compounds, can also be used.</p> |
