THERMOPLASTIC AND ELASTOMERIC FORMULATIONS ON BASIS OF COMPOUND ETHERS OF STARCHY MATERIAL AND METHODS OF SYNTHESIS THEREOF Russian patent published in 2015 - IPC C08L3/06 C08L23/06 C08L75/08 C08L101/16 A23G4/08 

FIELD: chemistry.

SUBSTANCE: invention relates to an elastomeric composition with a biodegradability degree below 50%, preferably below 30%, which comprises at least 0.5% and at most 99.95 wt % acetate of a starchy material, having a degree of substitution (DS) between 2.5 and 3 and, at least, 0.05 wt % and at most 99.5 wt % of a polymer other than starch, where the polymer is selected from a group comprising natural rubber and its derivatives, polyisobutylenes, polyisoprenes, styrene-butadiene copolymers (SBR), butadiene-acrylonitrile copolymers, hydrogenated butadiene-acrylonitrile copolymers, acrylonitrile-styrene-acrylate copolymers (ASA), ethylene-methyl acrylate copolymers (EAM), thermoplastic polyurethanes (TPU) in the form of simple ethers or in the form of a compound ether-simple ether, polyethylene or polypropylene, functionalised with halogenated silane, units of acrylic or maleic anhydride, ethylene-diene monomer rubber (EDM) and ethylene-propylene-diene monomer rubber (EPDM), thermoplastic elastomers, derived from polyolefines (TPO), styrene-butylene-styrene copolymers (SBS) and styrene-ethylene-butylene-styrene copolymers (SEBS), functionalised with units of maleic anhydride, and other blends of the above polymers. The composition may be used as a masterbatch or a matrix of the masterbatch, a plastic raw material, a compound for plastic or elastomeric articles, an adhesive, especially of a hot-melt type, or a matrix for the formulation of an adhesive, in particular of a hot-melt type, as a gum base or a matrix of the gum base, in particular for chewing gum, resin, co-resin or nanofiller for rubber, elastomers, bitumens, printing ink, varnish, paint, paper and cardboard, woven and non-woven products or thermosetting resins. It may also be used for the production of parts of equipment for the transport industry, in particular the automotive, aeronautical, railroad or ship building industry, for the electrical appliance, electronic appliance or electrical household appliance industries or for the sports and leisure industry.

EFFECT: compositions with low or very low biodegradability, long term high stability in water.

20 cl, 3 tbl