Flame-resistant polycarbonates, containing in their...

Details Flame-resistant polycarbonates, containing in their... Flame-resistant polycarbonates, containing in their...

C - Chemistry, Metallurgy

08

G

402/174

C08G 63/68 (2006.01) C08G 64/10 (2006.01)

Patent

CA 1303778

1. C A S E 2721 "FLAME-RESISTANT POLYCARBONATES, CONTAINING IN THEIR POLYMERIC CHAIN UNITS DERIVING FROM MONO-HALOGENATED TETRA-PHENYL COMPOUNDS" Abstract Thermoplastic, branched, high-molecular weight polycarbonates endowed with properties of flame- resistance (self-extinguishing polycarbonates) are characterized by the presence in their polymeric chain of units deriving from a di-hydroxy-aromatic compound having the formula: (I) Image wherein: R is a single bond; or is a substituted or non-substituted, Linear or branched alkyl group containing from 1 to 5 carbon atoms; or is a group selected from O, S, SO2, CO; X and Y are equal to, or different from, each other and stay for H or CH3; m and n are integers, equal to or different from each other, ranging from 1 to 4; 2. and of units deriving from a mono-halogenated tetra- phenyl compound having the formula: Image wherein: R, R2, R4, R6 stay for OH; R1, R3, R5, R7, either equal to, or different, from one another, stay for OH, H, or a linear or branched alkyl group of from 1 to 5 carbon atoms.

571301

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