Process for the preparation of poly(ester-carbonate)s
AssigneeGeneral Electric Company
InventorsSukhendu B. Hait, Swaminathan Sivaram
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Abstract
The invention relates to a process for the preparation of poly (ester-carbonate)s from the corresponding oligomers, using solid state polymerization process, which comprises mixing the desired oligomers in a suitable solvent or non-solvent, adding a suitable catalyst to this mixture, refluxing the mixture for a period of 1 to 8 hours, removing the solvent by known methods, polymerization the oligomer mixture in the solid state either in presence of vacuum or under a flow of inn gas at a temperature ranging between 180-240.degree. C. for a period of 5 to 20 hours to obtain the product.
Claims16
A process for the preparation of poly(ester-carbonate)s which comprises:
- mixing poly(arylcarbonate) and poly(arylester) or poly(alkylester) oligomers in a non-solvent,
- adding a catalyst to the mixture thus formed,
- refluxing the mixture for a period of 1 to 8 hours,
- removing the non-solvent from said mixture, and
- polymerizing said mixture for a period of 5-20 hours in the solid state in vacuum or under a flow of inert gas, at a temperature higher than the glass transition temperature of said mixture but below its melting point.
Dependencies are inferred from the claim text.