Bis(cyclic carbonates), precursors thereof, and polycarbonate co

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having a halogen atom or oxygen single bonded...

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528196, 528371, C08G 6362

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active

046365591

ABSTRACT:
Novel bis(cyclic carbonates) are useful as cross-linking agents for polycarbonate compositions (including cyclic polycarbonate oligomers), and, in combination with flame retardant agents, as anti-drip agents for polycarbonate resins. This bis(cyclic carbonates) may be prepared by the reaction of phosgene with novel tetraphenols, which in turn may be prepared by the condensation of aliphatic dialdehydes with phenols.

REFERENCES:
patent: 4440937 (1984-04-01), Krimm et al.
patent: 4579896 (1986-04-01), Rosenquist

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