C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/2013
C08G 81/00 (2006.01)
Patent
CA 2002879
ABSTRACT A method for preparing poly(aryl ether)-(poly aryl carbonate) block copolymers by the decarboxylation of copolycarbonates prepared by the condensation of two different aromatic dihydroxy compounds and a carbonate precursor such as phosgene. At least one of the aromatic diols must have at least one electron- withdrawing group located in a position ortho or para to at least one of its hydroxy groups and at least one of the diols must not have any electron-withdrawing groups in a position ortho or para to either of its hydroxy groups. The method is particularly effective in making crystalline block copolymers. The copolymers of the present invention exhibit high temperature stability and excellent thermoplastic engineering properties as well as superior solvent resistance. The copolymers are particularly useful for producing molded plastic components for the automotive and electrical housings markets. 35,395-F
Bales Stephen E.
Crain Steven P.
Mullins Michael J.
Murray Daniel J.
Woo Edmund P.
Smart & Biggar
The Dow Chemical Company
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