Organopolysiloxane-phenolphthalein-polycarbonate copolymers
AssigneeGeneral Electric Company
InventorArnold Factor
Life of this patent
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Abstract
Polymeric compositions containing organosiloxane units, carbonate units and a phenolphthalein nucleus are found to be both thermally processable and possess excellent flame resistance and smoke properties.
Claims6
A composition of matter comprising units of the general formula ##STR9## where R is independently selected from the lower alkyl radicals of from 1 to 3 carbon atoms and the phenyl radical, R' is independently selected from H, an alkyl radical having from 1 to 4 carbon atoms inclusive, chlorine, bromine, iodine and nitro, and n and q independently are whole numbers equal to at least 1.
A composition of matter comprising units of the formula ##STR10## where n and q independently are whole numbers equal to at least 1.
A composition of matter comprising units of the formula ##STR11## where n and q independently are whole numbers equal to at least 1.
A composition of matter comprising units of the formula ##STR12## where n and q independently are whole numbers equal to at least 1.
A composition of matter comprising units of the formula ##STR13## where n and q independently are whole numbers equal to or in excess of 1.
A composition of matter comprising units of the formula ##STR14## where n and q independently are whole numbers equal to or in excess of 1.
Dependencies are inferred from the claim text.