C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 1/22 (2006.01) C08B 3/16 (2006.01) C08B 3/22 (2006.01) C08L 1/12 (2006.01) C08L 67/04 (2006.01) D01D 5/08 (2006.01) D01F 2/28 (2006.01)
Patent
CA 2128812
Abstract A plasticized cellulose acetate is described with a content of a modified cellulose acetate A comprising a grafted oligomer of a cyclic ester, in particular in the form of .epsilon.-caprolactone, which comprises additionally a plasticizing agent in the form of an oligomer B of a cyclic ester, and the terminal carboxyl group of the oligomer is esterified with an alcohol or an alcohol derivative having at least one free hydroxyl group, with a boiling point of at least approximately 120° C and melting point of no more than approximately 180° C and the ratio of weight of component A to B is represented by the formula (I) 0.3 ? A/(A + B) ? 0.95 (I). This plasticized cellulose acetate can be produced advantageously for example when an oligomer B in the form of the reaction product of a cyclic ester, in particular in the form of .epsilon.-caprolactone, and monofunctional and/or polyfunctional alcohol and/or an alcohol derivative comprising at least one free hydroxyl group, is reacted in the melt in the presence of a catalyst with a cellulose acetate comprising hydroxyl groups. This process is economical. Relative to known products, the product of this process exhibits a lower melting point and can be used for the production of filaments by spinning from the melt. 27
Mulhaupt Rolf
Schatzle Joachim
Warth Holger
Rhone-Poulenc Rhodia Aktiengesellschaft
Robic
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