Internal stabilization of polycarbonate resins

Details Internal stabilization of polycarbonate resins Internal stabilization of polycarbonate resins

1988-05-31

1990-07-31

Bleutge, John C.

Stock material or miscellaneous articles

Composite

Of polycarbonate

528125, 528196, 528204, 525439, C08J 328, C08G 6112, C08G 6346

Patent

active

049450018

ABSTRACT:
A new polycarbonate copolymer resin is formed by internal generation of stabilizers bound to the polymer chain. Irradiation of a solid piece or a deoxygenated solution of the resin at a first frequency below 300 nm generates 2 to 8 mol percent of phenyl salicylate groups which are rearranged to dihydroxybenzophenone groups by irradiating the resin under oxygen excluding conditions at a second frequency from 300 to 320 nm.

REFERENCES:
Gupta et al., "Macromolecules", vol. 13, No. 2, Mar.-Apr. 1980, Amer. Chem. Soc., pp. 262-267.

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