Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having a halogen atom or oxygen single bonded...
Patent
1986-07-24
1988-04-26
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having a halogen atom or oxygen single bonded...
524601, 524612, 528 86, 528196, 528198, 528371, 528377, 528378, 528379, C08G 6362
Patent
active
047405830
ABSTRACT:
Cyclic polycarbonate (or thiol analog) oligomer mixtures are prepared by the reaction of bishaloformates or their thio analogs, or mixtures thereof with dihydroxy or dimercapto compounds, with alkali metal hydroxides and various amines. The oligomer mixtures may be converted to polycarbonates or their thiol analogs by a method which is particularly adaptable to integration with polycarbonate processing operations. Polymerization may be conducted simultaneously with molding, extrusion and the like. The oligomer mixtures are adaptable to the preparation of filled prepregs.
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C. A., 97, 216892t, 216893u, 216894v.
Brunelle Daniel J.
Evans Thomas L.
Hilakos William
Patterson Dwight J.
Rosenquist Niles R.
Anderson Harold D.
Davis Jr. James C.
General Electric Company
Magee Jr. James
Pittman William H.
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