C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/359
C08G 61/12 (2006.01) C08G 67/00 (2006.01) C08L 65/00 (2006.01)
Patent
CA 1266749
Abstract of the Disclosure The preparation of poly(arylene ether ketones) by Friedel-Crafts polymerization, in the presence of a Lewis acid catalyst and a diluent, is conducted under conditions in which the polymer and/or its complex with the catalyst is suspended in the diluent during at least part of the poly- reaction mixture if desired. The dispersant may be a poly- mer or an organic compound containing at least eight carbon atoms and is preferably a Lewis base. The dispersant pre- ferably contains at least one molecular segment substan- tially compatible with the poly(arylene ether ketone) or its complex with the Lewis acid and substantially incompatible with the diluent and at least one molecular segment substan- tially compatible with the diluent and substantially incom- patible with the poly(arylene ether ketone) or its complex with the Lewis acid. By employing the dispersion process of this invention, the polymer is maintained in a finely divided particulate form, greatly facilitating isolation and purifi- cation of the polymer, which is otherwise difficult to handle because of, for example, high viscosity.
490084
Becker Paul
Gors Heinrich Carl
Jansons Viktors
Moore Stephen
Reamey Robert Howard
Fetherstonhaugh & Co.
Raychem Corporation
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