Cellulose diacetate spinning dope and a process for producing a

Details Cellulose diacetate spinning dope and a process for producing a Cellulose diacetate spinning dope and a process for producing a

1998-05-20

1999-11-02

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264211, D01D 504, D01D 110, D01D 230

Patent

active

059764406

ABSTRACT:
A spinning dope for the stable production of a cellulose diacetate fiber at a high productivity rate, such fiber being almost free from the occurrence of fluffs and excellent in strength and elongation properties. The spinning dope is a composition formed of (1) acetone or a solvent containing acetone and 0 to 5% by weight, based on the acetone, of water or methanol, (2) 24 to 33% by weight, based on the total weight of the composition, of cellulose diacetate, and (3) at least a phthalate ester, an aliphatic dibasic acid ester, a fatty acid ester, a phosphate ester, an epoxy plasticizer or a glycol-ester-containing plasticizer; and the composition has a thixotropy index (I), represented by the following equation, of at least 1.3,

REFERENCES:
patent: 4888147 (1989-12-01), Mochida et al.
WPI Abstract Accession No. 95-032975 [05] & JP 060316810 A (Mitsubishi Rayon) Nov. 15, 1994.

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