Salvage of polycarbonate wastes by conversion to monomeric hydro

Details Salvage of polycarbonate wastes by conversion to monomeric hydro Salvage of polycarbonate wastes by conversion to monomeric hydro

1982-06-25

1984-04-17

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

525462, 525467, 525469, 525470, 528125, 528126, 528128, 528172, 528174, 528211, 528367, 528368, 528369, 560 24, 560 27, 560 29, 560 32, 560 33, 568680, 568763, C08G 6362

Patent

active

044435932

ABSTRACT:
Waste or surplus polycarbonates are salvaged by reacting them with a hydroxy amine in an amount sufficient to cleave about 85% or more of the carbonate groups, thereby converting the polymer to a mixture of dihydroxy monomers--including novel dihydroxy carbamates--which may be converted to useful polymers by reaction with other difunctional monomers having at least one hydroxy-reactive functional group per molecule.

REFERENCES:
patent: 3223678 (1965-12-01), Bolgiano

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