including u03b1 u03b2 olefinically unsaturated acids and esters thereof such as methyl acrylate ethyl acrylate chloropropyl acrylate butyl acrylate hexyl acrylate 2 ethylhexyl acrylate dodecyl acrylate octadecylacrylate methoxyethyl acrylate ethoxyethyl acrylate hexylthioethyl acrylate methyl methacrylate ethyl methacrylate butyl methacrylate and the like the vinyl chloride polymer in addition to the methyltricaprylammonium molybdate may contain the usual compounding ingredients known to the art such as fillers stabilizers opacifiers lubricants processing aids impact modifiers plasticizers antioxidants and the like smoke retardancy may be measured using an nbs smoke chamber according to procedures described in astm e662 79 34 test for specific optical density of smoke generated by solid materials 34 maximum smoke density dm is a dimensionless number and has the advantage of representing a smoke density independent of chamber volume specimen size or photometer path length provided a consistent dimensional system is used percent smoke reduction is calculated using the equation equ1 the term 34 dm g 34 means maximum smoke density per gram of material dm and other aspects of the physical optics of light transmission through smoke are discussed fully in the astm publication smoke retardance may be measured quickly using the goodrich smoke char test test samples may be prepared by dry blending polymer resin and.