Abstract:
Compostible compositions in the form of homogeneous mixtures containing 20-80% by weight unvulcanized, uncured C4-C6 alkadiene elastomer, e. g. , natural rubber, 5-20% of modifier, e. g. , casein, dextrose, starch or mixtures thereof, 1-40% filler, e. g. , titanium dioxide or fibrous clay, 0-30% wax, e. g. , carnauba wax, 0-40% styrene resin, e. g. , polystyrene, 0-10% additive, e. g. , bis-steramide, and 0-20% yeast are disclosed. Preferably such compositions are prepared as aqueous dispersions that can be converted by conventional casting procedures into thin sheets, e. g. , about 1 to 10 mils, having useful tensile strength, elongation, flexibility and moisture barrier properties.