Rhone-poulenc Rhodia Aktiengesellschaft

Rhone-poulenc Rhodia Aktinegesellschaft

Joachim Schatzle

Ties Karstens

Rolf Mulhaupt

Gunter Maurer

Martin Tubach

Holger Warth

Michael Wedler

Robert Kohler

Molded bodies comprising bond material based on cellulose acetate and

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.degree. C. and a melting point of no more than approximately 180.degree. C. and the ratio of weight of component A to B is represented by the formula (I)

Plasticized cellulose acetate, process for its production and its use

There are described filaments on the basis of a cellulose acetate soluble in acetone, the degree of polymerization (DP) of the cellulose acetate being between about 110 and 210 and the degree of substitution (DS) preferably between about 2.2 and 2.7. Optically isotropic spinning solutions can be obtained, the cellulose acetate concentration of which is about 35 to 47 mass-%. When such an optically isotropic spinning solution is spun, in particular by dry spinning, filaments are obtained in a profitable manner because the costs connected with the recovery of the acetone can be appreciably lowered, without impairing the desirable properties of the filaments, which are suitable in particular for the production of cigarette filter tow.

Cellulose acetate filaments, an optically isotropic spinning solution

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Kenzingen, Germany

Joachim Schatzle