Wholly aromatic polyester carbonate and process for...

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 63/64 (2006.01) C08G 63/80 (2006.01)

Patent

CA 2425357

A process for producing an aromatic polyester carbonate which comprises providing a raw material mixture comprising an aromatic dicarboxylic acid, an aromatic diol, and a diaryl carbonate, a prepolymerization step, a crystallization step, and a solid-state polymerization step as essential steps, and optionally has also a compression forming step. The process has allowed the production of an aromatic polyester carbonate which is reduced in discoloration and has an increased degree of polymerization with good productivity.

L'invention concerne un procédé de production d'un carbonate de polyester aromatique, qui consiste à préparer un mélange de matériau brut renfermant un acide dicarboxylique aromatique, un diol aromatique et un carbonate de diaryle, et qui comporte des étapes essentielles de prépolymérisation, de cristallisation et de polymérisation en phase solide, ainsi que, éventuellement, une étape de formage par compression. Le procédé permet de produire un carbonate polyester aromatique qui présente une décoloration réduite et un niveau élevé de polymérisation avec une bonne productivité.

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