POLYCARBONATES AND COPOLYCARBONATES HAVING IMPROVED ADHESION TO METAL Russian patent published in 2012 - IPC C08G64/12 C07D209/44 

FIELD: chemistry.

SUBSTANCE: copolycarbonate contains an isomeric mixture of the following formulae as a repeating monomer unit:

,

where R¹ is hydrogen or alkyl with 1-10 carbon atoms and R² is an alkyl with 1-10 carbon atoms or, if needed, a phenyl or benzyl substituted with hydrogen and/or an alkyl with 1-10 carbon atoms, respectively; and diphenol of formula:

, where R³ and R⁴ denote hydrogen, an alkyl with 1-18 carbon atoms, an alkoxy with 1-18 carbon atoms, a halogen, respectively, if needed, a substitued aryl or arylalkyl, and X is a single bond, -SO₂-, -CO-, -O-, -S-, an alkylene with 1-6 carbon atoms, an alkyidene with 2-5 carbon atoms or a cycloalkylidene with 5-6 carbon atoms, which can be substituted with an alkyl with 1-6 carbon atoms, an arylene with 6-12 carbon atoms, which, if needed, is condensed with aromatic ring groups containing heteroatoms.

EFFECT: high glass transition temperature, high operating temperature and improved adhesion to metal.

9 cl, 9 ex