Patent ID: 11926779
Assignee: SUMITOMO CHEMICAL COMPANY LIMITED
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A liquid crystal polyester consisting of a repeating unit (A1) represented by the formula (A1) and a repeating unit (A2) represented by the formula (A2),

—O—Ar11—CO—  (A1)

—O—Ar12—CO—  (A2)

wherein:
a molar ratio between phenolic hydroxyl groups derived from the repeating unit (A1) and phenolic hydroxyl groups derived from the repeating unit (A2) (phenolic hydroxyl groups derived from the repeating unit (A2)/phenolic hydroxyl groups derived from the repeating unit (A1)) is 1 or lower, as calculated by 1H-NMR,
a ratio between the number of the repeating unit (A1) and the number of the repeating unit (A2) [repeating unit (A2)/repeating unit (A1)] is 1.2 or larger,
the number of the repeating unit (A1) is 20% or more based on 100% of a total number of all repeating units of the liquid crystal polyester,
the number of the repeating unit (A2) is 58% or more based on 100% of a total number of all repeating units of the liquid crystal polyester,
a flow starting temperature of the liquid crystal polyester is 250° C. or more,
Ar11 represents a phenylene group, and a hydrogen atom in the phenylene group in Ar11 is optionally substituted by a halogen atom, an alkyl group or an aryl group, and
Ar12 represents a naphthylene group, and a hydrogen atom in the naphthylene group in Ar12 is optionally substituted by a halogen atom, an alkyl group or an aryl group.