Patent ID: 7291664
Filing Date: 2007-11-06
Classification: C08J,C08L,Y10T

Abstract:
1. A multicomponent composition for photodegradable and biodegradable plastic articles, said composition consisting of components (1), (2), (3), (4) and (5), or consisting of components (1), (2), (4) and (5): (1) a biodegradable component in an amount of 0.1-10 wt %, which does not contain starch, the component comprising one or more substances selected from the group consisting of chitin, casein, sodium phosphate, zinc phosphate, calcium phosphate, magnesium phosphate, potassium phosphate, sodium hydrogen phosphate, zinc hydrogen phosphate, calcium hydrogen phosphate, magnesium hydrogen phosphate, potassium hydrogen phosphate, sodium dihydrogen phosphate, zinc dihydrogen phosphate, calcium dihydrogen phosphate, magnesium dihydrogen phosphate, potassium dihydrogen phosphate, erucamide, and oleamide; (2) a photodegradable and auto-oxidation catalysis component in an amount of 0.1-8.0 wt %, the component comprising one or more substances selected from the group consisting of n-octyl ferrocene, n-octanoyl ferrocene, undecylenoyl ferrocene, γ-ferrocenyl butyric acid, γ-ferrocenyl butyl butyrate, iron diethyl dithiocarbamate, iron dibutyl dithiocarbamate, cobalt formate, manganese formate, zinc formate, iron formate, cerium formate, cobalt acetate, manganese acetate, cerium acetate, iron acetate, zinc acetate, cobalt oleate, manganese oleate, cerium oleate, iron oleate, zinc oleate, cobalt laurate, manganese laurate, cerium laurate, iron laurate, zinc laurate, cobalt stearate, manganese stearate, cerium stearate, iron stearate, zinc stearate, cobalt cetylate, manganese cetylate, cerium cetylate, iron cetylate, zinc cetylate, cobalt acetylacetonate, manganese acetylacetonate, iron acetylacetonate, dibutyltin laurate, and benzophenone; (3) non-metallic minerals in an amount of 10-90 wt %, the minerals comprising one or more substances selected from the group consisting of talc, calcium carbonate, kaolin, and wollastonite; (4) a biodegradable aid component in an amount of 0.1-8.0 wt %, the biodegradable aid component comprising one or more substances selected from the group consisting of polyhydroxy-containing carboxylate, epoxidized soybean oil, and epoxy acetyl castor oil; and (5) a carrier component in an amount of the balance, the carrier being a resin selected from the group consisting of PE, PP, PS, ABS, EVA, PA, PET, and PVC.