| 摘要 |
A thermoplastic or elastomeric composition, is characterized in that: a) it exhibits a degree of biodegradability of less than 50%, preferably less than 30%, and b) it contains at least 0.5% and at most 99.95% by weight of an ester of a starchy material, which has a degree of ester substitution (DS) of between 1.6 and 3, and at least 0.05% by weight and at most 99.5% by weight of a polymer other than starch. |
| 主权项 |
1. An elastomeric composition comprising:
at least 0.5% and at most 99.95% by weight of an acetate of a starchy material having a degree of substitution (DS) of esters between 2.6 and 3; and at least 0.05% by weight and at most 99.5% by weight of a polymer other than starch, wherein the elastomeric composition has a degree of biodegradability according to the ISO 14851 standard of less than 50%, and wherein the polymer other than starch is an elastomeric polymer selected from the group consisting of natural rubbers and derivatives thereof, polyisobutylenes, polyisoprenes, butadiene-styrene copolymers (SBR), butadiene-acrylonitrile copolymers, hydrogenated butadiene-acrylonitrile copolymers, acrylonitrile-styrene-acrylate copolymers (ASA), ethylene/methyl acrylate copolymers (EAM), thermoplastic polyurethanes (TPU) of ether or ester-ether type, polyethylenes or polypropylenes functionalized with silane, halogenated, acrylic or maleic anhydride units, EDM and EPDM, thermoplastic elastomers derived from polyolefins (TPO), styrene-butylene-styrene copolymers (SBS) and styrene-ethylene-butylene-styrene copolymers (SEBS) functionalized with maleic anhydride units, and any mixtures of these polymers. |
