Branched polycarbonates and method for their preparation

Details Branched polycarbonates and method for their preparation Branched polycarbonates and method for their preparation

C - Chemistry, Metallurgy

08

G

400/5604

C08G 64/00 (2006.01) C08G 64/14 (2006.01) C08L 63/00 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2021101

RD-18438 BRANCHED POLYCARBONATES AND METHOD FOR THEIR PREPARATION Abstract Branched polycarbonates are prepared by the reaction of at least one polyepoxy compound, preferably triglycidyl isocyanurate, with at least one carboxylic acid- terminated polycarbonate, preferably of the type prepared by employing t-butyl p-hydroxybenzoate as a chainstopper in an interfacial polycarbonate formation reaction followed by thermal elimination of isobutene. The branched polycarbonates have high melt viscosities and high complex viscosity ratios, and are particularly useful in such operations as blow molding.

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