Process for the production of particulate polymeric material hav

Details Process for the production of particulate polymeric material hav Process for the production of particulate polymeric material hav

1974-11-18

1976-10-19

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 47CP, 260 49, 260 78S, 260 7841, C08G 6948, C08G 7318, C08G 7320, C08G 7322

Patent

active

039870154

ABSTRACT:
An improved process is provided for the precipitation of a polymer from a solution to form a particulate polymeric material exhibiting an unusually high surface area, i.e. having a surface area of at least 125 square meters per gram. A non-solvent for the polymer initially is added to the polymer solution until the solution is rendered turbid, a specified additional quantity of the non-solvent is added to the solution, and the resulting turbid solution is added to a major quantity of the non-solvent under conditions found capable of yielding the desired particulate polymeric material. High surface area particles of a BBB type polymeric material are formed in a preferred embodiment of the process. The resulting particles are rendered more readily compactable to form three-dimensional shaped articles, etc. because of their increased surface energy resulting from the large surface area.

REFERENCES:
patent: 3301828 (1967-01-01), Marvel
patent: 3313783 (1967-04-01), Iwakura et al.
patent: 3470140 (1969-09-01), Salle et al.
patent: 3541036 (1970-11-01), Libackyj
patent: 3573260 (1971-03-01), Morello
patent: 3574170 (1971-04-01), Chenevey
patent: 3761445 (1973-09-01), Balme et al.
patent: 3784517 (1974-01-01), Hedberg

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