Polycarbonate resin
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsToshihito Goto, Noriyoshi Ogawa
Life of this patent
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Abstract
Provided is a polycarbonate resin having excellent solubility in low-boiling-point non-halogenated solvents and having a high glass transition temperature. The polycarbonate resin includes constituent units (A) represented by general formula (1) (for example 4,4′-(4-methylpentane-2,2-diyl)diphenol) and constituent units (B) represented by general formula (2) (for example 4,4′-(1-phenylethane-1,1-diyl)diphenol), the molar ratio of the constituent units (A) to the constituent units (B), A/B, being 45/55 to 95/5, and includes a terminal structure selected from formula (T1) (for example p-t-butylphenol) and/or formula (T2) (for example 3-(2H-benzotriazol-2-yl)-4-hydroxyphenethylmethacrylate).
Claims10
A polycarbonate resin which is a copolymer consisting of a structural unit (A) represented by general formula (1) and a structural unit (B) represented by general formula (3), and comprises a terminal structure selected from a terminal structure represented by formula (T1) or a terminal structure represented by formula (T2), the molar ratio between the structural unit (A) and the structural unit (B) (A/B) being 45/55 to 95/5:
- wherein in formula (T1):
- RA represents an alkylene group having 1 to 20 carbon atoms or alkenylene group having 2 to 20 carbon atoms, which may have a substituent;
- RB and RC each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or an aryl group having 6 to 12 carbon atoms;
- Z represents an ether bond, a carbonyl group, an ester bond or a single bond;
- a represents an integer of 1 to 3;
- and
- * represents a position of bonding to the main chain of the polycarbonate resin,
- wherein in formula (T2)):
- RD represents hydrogen or an alkyl group having 1 to 6 carbon atoms;
- RE represents an alkylene group having 1 to 6 carbon atoms;
- RF represents a hydrogen atom or a methyl group;
- RG represents a hydrogen atom or halogen;
- and
- * represents a position of bonding to the main chain of the polycarbonate resin.
Dependencies are inferred from the claim text.