C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/177
C08G 63/64 (2006.01)
Patent
CA 1173197
ABSTRACT OF THE DISCLOSURE This invention is directed to a solid aromatic copolyestercarbonate containing meta-phenylene groups and para-phenylene groups wherein the molar ratio of para-phenylene to meta-phenylene is from 19:1 to 1:19. The copolyestercarbonate contains ordered repeating units of the formula: Image wherein each R is independently an aromatic hydro- carbylene or inertly substituted hydrocarbylene, x is a number from 0.05 to 10, R1 is a mixture of meta- -phenylene or inertly substituted meta-phenylene and para-phenylene or inertly substituted para-phenylene. These copolyestercarbonates exhibit physical properties such as heat resistance, clarity and impact strength that are superior to the comparable properties of corresponding random copolymers. They exhibit melt processability that is superior to the melt process- ability of corresponding copolyestercarbonates wherein 28,910-F R1 is entirely para-phenylene. They exhibit heat resistance, notch sensitivity and low temperature impact resistance that are superior to corresponding copolyestercarbonates wherein R1 is entirely meta- -phenylene. Such resins are useful for making trans- parent tough films and molded articles having high heat resistance. 28,910-F
388749
Smart & Biggar
The Dow Chemical Company
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