Poly(arylester-carbonate)s and a process for the preparation of poly(arylester-carbonate)s

A process for the preparation of poly(arylester-carbonate)s of the formula, ##STR4## where a=0.33 and b=0.67 moles, R.sub.1 represents groups such as isopropylidene, methylene, ethylmethylene, phenylmethylene, hexafluoroisopropylidene, phthalines, phthalimides, N-substituted phthalimides (methyl, phenyl), 1,4-phenylene, 1,4-naphthalene, 2,6-naphthalene, dihydroanthracene, spirobisindanes, indanes, thiophenes, azo, dimethyldiphenylsilane, tetraphenylsilane, siloxane, hydroquinoids, cyclopentane, cyclohexane, ether, sulfide, sulfoxide, ketone, ester, and amide, R.sub.2 represents 1,4-benzene, 1,3-benzene 4,4- biphenyl, p-terphenyl, m-terphenyl, 1,4-naphthalene, 2,6- naphthalene, and compounds having the structure ##STR5## wherein Y represents groups such as isopropylidene, methylene, hexafluoroisopropylidene, ethylmethylene, isobutylmethylmethylene, diphenylmethylene, phenylmethylmethylene, phthalines, phthalimides, N-substituted phthalimides (phenyl, methyl), dihydroanthracene, indanes, spirobisindanes, thiophenes, azo, dimethyldiphenylsilane, tetraphenylsilane, hydroquinoids, cyclohexane, sulfide, sulfone, sulfoxide, ketone, ester, and amide and X represents substituents on aromatic ring which consist of a straight chain of carbon atoms or an alkyl group consisting of a branching chain or a phenyl group or a halogen atom and n is an integer from 1 to 4, which comprises polymerization of the monomer of the formula where R.sub.1, R.sub.2 X.sub.n are as described previously comprising heating at a temperature in the range of 80.degree. to 850.degree. C., at a pressure in the range of 760 mm Hg to 0.1 mm Hg in an inert atmosphere in the presence of a metal organic compound catalyst, for a period in the range of 3 to 7 hours.