Patent ID: 9296889
Filing Date: 2016-03-29
CPC Classification: B01F,C08L,D01D,D01F,D10B

Claim Text:
1. A process for preparing a homogeneous spinning solution for the production of acrylic fibers which comprises the following steps: i) preparation of a homogeneous suspension by mixing a powder homopolymer or copolymer of acrylonitrile with a mixture of DMSO/water in an amount of from 94.5/5.5 to 97/3% w/w at a temperature of from 5° C. to 10° C., said mixing being carried out in a time ranging from 5 to 30 minutes, by spraying a stream of the DMSO/water solvent on a stream of powder homopolymer or copolymer of acrylonitrile, disintegrated and premixed; ii) heating the homogeneous suspension coming from step i) at a temperature ranging from 70° C. to 150° C. in a time ranging of from 0.5 to 30 minutes, until the complete dissolution of the homopolymer or copolymer and the formation of a homogeneous solution.