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AssigneesDaicel Chemical Industries, Ltd., Tayca Corporation
InventorsMasanori Itoh, Akira Miyazawa, Teruo Aoe, Osamu Ikemoto
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A composition comprises a cellulose acetate or other cellulose ester, and an anatase-type titanium oxide having (1) a specific surface area of not less than 30 m.sup.2 /g, (2) a primary particle size of 0.001 to 0.07 .mu.m, or (3) a specific surface area of not less than 30 m.sup.2 /g and a primary particle size of 0.001 to 0.07 .mu.m. For improving the photodegradability and the dispersibility, the surface of the titanium oxide may be treated with a phosphoric acid salt or other phosphorus compound, a polyhydric alcohol, an amino acid or others. Use of a low-substituted cellulose ester with an average substitution degree not exceeding 2.15 insures high biodegradability. The composition may further contain a plasticizer and/or an aliphatic polyester, a biodegradation accelerator (e.g. organic acids or esters thereof). The degradable cellulose ester composition is highly photodegradable and moldable and hence useful for the manufacture of various articles.
A cellulose ester composition comprising a cellulose ester and an anatase titanium oxide, wherein said titanium oxide has:
A cellulose ester composition comprising a cellulose ester and an anatase titanium oxide, wherein the surface of said titanium oxide is treated with at least one component selected from the group consisting of a phosphorus compound or a salt thereof, a polyhydric alcohol and an amino acid or a salt thereof.
A cellulose ester composition comprising 0.1 to 10 parts by weight of an anatase titanium oxide relative to 100 parts by weight of a cellulose ester with an organic acid having 2 to 4 carbon atoms, wherein said titanium oxide has:
A shaped article comprising, as molded or formed, a cellulose ester composition which comprises a cellulose ester and an anatase titanium oxide, wherein
A fiber or fibrous article which comprises:
A shaped article comprising, as molded or formed, a cellulose ester composition which comprises a cellulose ester and an anatase titanium oxide, wherein
A fiber or fibrous article which comprises:
Dependencies are inferred from the claim text.