Loading patent…
OwnerGary Davis, Dibakar Dhara +2inventors
InventorsGary Davis, Dibakar Dhara, Brian Mullen, Joshua Stone
Estimating the term…
Polycarbonate compositions having an aromatic polycarbonate resin with 90% or greater fluoroalkylene carbonate end-groups are formed from a partially fluorinated alcohol or a partially fluorinated polymeric alcohol, and a bisphenol and a carbonate source using melt or interfacial polymerization methods. Copolymers and blends with a variety of other bisphenols and other thermoplastics are also described. The polycarbonate compositions show high water contact angles, fluorine enrichment on the surface layer of molded articles, and good flame retardant properties and are useful in a variety of applications including medical, automotive, telecommunication and weatherable applications.
A polycarbonate composition comprising:
A method for making a polycarbonate resin having fluoroalkylene carbonate end-group, said method comprising combining an aromatic dihydroxy compound, a fluorinated alcohol, phosgene, an organic solvent, water, an organic base and an inorganic base.
A method for making a polycarbonate resin with fluoroalkylene carbonate end-groups, said method comprising the steps of producing a fluoroalkylene chloroformate and then adding the fluoroalkylene chloroformate to a mixture comprising an aromatic dihydroxy compound, phosgene, an organic solvent, water, an organic base and an inorganic base.
A method for making a polycarbonate resin comprising melt condensing a mixture comprising a fluorinated alcohol, an aromatic dihydroxy aromatic compound and a diarylcarbonate in the presence of a transesterfication catalyst.
A method for improving the flame retardancy of a polycarbonate resin formulation comprising combining a polycarbonate resin, said polycarbonate resin having fluoroalkylcarbonate end groups, and an FR additive.
A method for determining the authenticity of a polycarbonate article comprising the steps of:
A polycarbonate composition comprising an aromatic polycarbonate resin having fluoroalkylene carbonate end-groups and aromatic carbonate end-groups that are not fluorinated.
A polycarbonate composition comprising an aromatic polycarbonate resin having fluroroalkylene carbonate end-groups and a fire-retardant additive.
Dependencies are inferred from the claim text.