POLYMERS OF A HYDROPHOBIC NATURE, FILLED WITH STARCH COMPLEXES

摘要

: Hydrophobic polymers incompatible with starch contain¬ing, ae a filler, a starch complex in tha form of particles dlsperged in the hydrophobic polvmeric matrix and bound to the polymer matrix by means of coupling agents containing groups compatitale with the matrix and with the starch com¬plex or by means of reactive groups prasent in the starch-complex capable of being fixed to the polymeric matrix, characterised in that the starch complex is in the form of particles with a numeral average size of less them, l micron, it has a solubility in water t 100C of less than 20% and ia characterised by a second-derivative XS absoxption in the region of 940-950 cm"*, and wherein the starch complex, in the case where the hydrophobic biodegradable polymers of the matrix are selected from the group consisting of the ali¬phatic or aliphatic-aromatic polyeatara, the aliphatic poly-amides, polyamides-polyesters, polyurethane polyeatera, polyurethane-polyamideSr polyurea-polyesters, is a complex of starch with a complexing agent different from the polymer forming the matrix and from ethylene-vinylalcohol copoly- mers. 2. polymers according to claim l, wherain the coupling agent is selected from the groups consisting of a vinyl si-lane, an alKyl titanate, and bis-3-triethoxysilylpropyl tet-rasulphide. 3. Polymers according to claims 1 or 3, wherein the com-plexing agent different from the polymer forming the poly¬meric matrix is selected from tha group consisting of polylactic acid, polyglycolic acid, poly(lactic-glyeolie) acid copolymers, ethylene-acryltc acid copolymare, thylen-vinylacetata copolymers. No. of Pages : 24 No. of Claims : 25