Acrylonitrile polymer compositions and articles and methods for

Details Acrylonitrile polymer compositions and articles and methods for Acrylonitrile polymer compositions and articles and methods for

1996-08-08

1999-01-19

Seidleck, James J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 73, 521 79, 524235, 524280, 524566, 525540, 264 81, C08J 912, C08F 2044

Patent

active

058614427

ABSTRACT:
Process of mixing a fugitive plasticizer, e.g., ethylene carbonate, with moist particulate polyacrylonitrile then removing the water enabling adjustment of the melt viscosity for extrusion of the polyacrylonitrile into film, fiber, pellets and shaped articles. Stretching and heating the extruded polyacrylonitrile film or fiber causes the fugitive plasticizer to exude and vaporize from the film or fiber, carrying with it any remaining acrylonitrile monomer. The resulting film or fiber exhibits substantially increased molecular weight, thus enhancing the tensile strength and barrier properties of the polyacrylonitrile product. The process also produces polyacrylonitrile foam products. A novel cross-linking agent for polyacrylonitrile, divinyloxybutane, is disclosed. Thermostabilizing agents for polyacrylonitrile, N-maleimides and stilbene derivatives, are also disclosed.

REFERENCES:
patent: 5304590 (1994-04-01), Merz et al.
patent: 5434205 (1995-07-01), Fishman
patent: 5589520 (1996-12-01), Merz et al.

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