Internal stabilization of polycarbonate resins by two stage radi

Details Internal stabilization of polycarbonate resins by two stage radi Internal stabilization of polycarbonate resins by two stage radi

1986-12-08

1988-06-07

Bleutge, John C.

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

522163, 522907, 2041579, 20415788, 528125, 528196, 528204, C08J 328, C08G 6112, C08G 6346

Patent

active

047497262

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, American Chemical Society, pp. 262-267.

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