Polyester/polycarbonate blends

Details Polyester/polycarbonate blends Polyester/polycarbonate blends

C - Chemistry, Metallurgy

08

L

400/5603

C08L 67/02 (2006.01) C08G 63/85 (2006.01) C08L 69/00 (2006.01)

Patent

CA 1339289

Disclosed is a composition of matter comprising a polyester and a polycarbonate of 4,4-isopropylidene-diphenol wherein the polyester is produced using an organic derivative of tin as catalyst. The catalyst contains no titanium. By using such a catalyst, the blend does not tend to discolor as is usual when titanium catalysts are used. Prior teachings do not suggest that using tin, in the absence of titanium as a catalyst, overcame the discoloration problem when the polyester is blended with polycarbonate.

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