Crystalline aromatic polyketone copolymer produced from 4-mercaptophenol, dihaloterephtalophenone, and hydroquinone or dihydroxybenzophenone

摘要

A copolymer which can be employed for various molded articles, particularly for uses which require a high nonflammability, which copolymer is a crystalline aromatic polyketone type copolymer which has an intrinsic viscosity of not less than 0.40 and has a linear polymer structure comprising structural units (A) represented by the formula (A) <IMAGE> structural units (B) represented by the formula (B) <IMAGE> and structural units (C) represented by the formula (C1) <IMAGE> or by the formula (C2) <IMAGE> the molar ratio of said units (B) to said units (C) being in the range from 30:70 to 99:1, and the unit (A) and either the unit (B) or the unit (C) being linked alternately; and a process producing the same.