| 摘要 |
FIELD: cellulose derivatives. SUBSTANCE: structure contains biodegradable cellulose-acetate composition containing biodegradation-inducing agent included into acetyl cellulose with degree of substitution 2.0-2.6. Agent represents at least one compound, in particular phosphoric acid ester or its salt, contained in acetyl cellulose in amount 0.01 to 10 wt %. Watersolubility of agent is 2 g/cu.dm or less at room temperature. Acetyl cellulose can further contain dispersant to disperse fine particles in the composition. Structure can also contain photodegradation-favoring agent, namely titanium oxide, in amount 0.001 to 10 wt %. Exemplary structurecontaining filters are demonstrated. EFFECT: enhanced biodegradability of structure without loss in quality of tobacco filter, in particular without acetic acid smell formation. 10 cl, 1 dwg, 7 tbl, 7 ex |
