FIELD: polymer materials.
SUBSTANCE: group of inventions relates to structural polycarbonate-based plastics and items molded therefrom. A heat-resistant part is provided consisting of polycarbonate copolymer, which gas 5 to 95 mol % of repetitive units (component "a") described by general formula I: 
(I) and 95 to 5 mol % of repetitive units (component "b") described by general formula II: 
(II), where each of Ra-Rd independently represents hydrogen atom, hydrocarbon group optionally substituted with aromatic radical having 1 to 9 carbon atoms, or halogen atom, an W is alkyl group optionally substituted with aromatic radical having 1 to 9 carbon atoms. Provided are also a part for solder-fusion soldering, a part for light beam trajectory transformation, optical disk, plastic mirror, conductive polymer composition and electronic part transportation pan containing the latter.
EFFECT: increased heat resistance and dimension-retention capability.
34 cl, 2 dwg, 9 tbl, 36 ex
