Aromatic polycarbonates having polyfunctional UV screening units

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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428412, 525467, 528196, 528201, 528203, 528204, C08G 6400

Patent

active

055569366

ABSTRACT:
UV stabilized polycarbonates are provided having chemically combined polyhydric phenol benzotriazole carbonate units, such as 1,1-bis(4-hydroxyphenyl)-1-[4-hydroxy-3-(N-2-benzotriazole)phenyl]ethane carbonate units and methods for making. Incorporation of the polyhydric phenol benzotriazole functional units into the polycarbonate backbone can be achieved by redistribution or transesterification under melt polymerization conditions.

REFERENCES:
patent: 4061652 (1977-12-01), Schroeter et al.
patent: 4316033 (1982-02-01), Ching
patent: 5025083 (1991-06-01), Ueda et al.
patent: 5256728 (1993-10-01), Dardaris et al.
patent: 5414057 (1995-05-01), Campbell et al.
Gomez, Peter et al. "Functional Polymers" Polymer Bulletin 15, 135-140 (1986).

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