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US 12,331,170 B2Granted
Process for the production of homogeneous solutions of polyacrylonitrile-based polymer
AssigneeCytec Industries Inc.
InventorsVarun Kumar, Peter Mills, Jeremy Moskowitz, John Desmond Cook, James Smith, Billy Harmon
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Abstract
The present disclosure relates to a process for producing homogeneous solutions comprising dissolved polyacrylonitrile-based polymer, and a system suitable therefor. The homogeneous polymer solutions produced by the process described herein may be used for producing carbon fiber, typically carbon fiber used in manufacturing composite materials.
Claims18
A process for producing a homogeneous solution comprising dissolved polyacrylonitrile-based polymer, the process comprising:
- a) spraying one or more streams of solvent onto a stream of polyacrylonitrile-based polymer, in the form of a powder, at ambient temperature, in a dispersing apparatus comprising at least one rotor-stator, and
- subjecting the combination of polyacrylonitrile-based polymer and solvent to the shearing action of the at least one rotor-stator, at ambient temperature, to produce a substantially uniform dispersion,
- b) removing the dispersion from the dispersing apparatus, and
- c) heating the dispersion obtained from the dispersing apparatus at a temperature and for a time sufficient to completely dissolve the polyacrylonitrile-based polymer, thereby forming the homogeneous solution.
1 more element
Dependencies are inferred from the claim text.