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    • 7. 发明授权
    • Melt processable thermotropic aromatic copolyesters
    • 可熔融加工的热致芳香族共聚酯
    • US4946926A
    • 1990-08-07
    • US348316
    • 1989-05-04
    • William B. MarshallJames L. Brewbaker
    • William B. MarshallJames L. Brewbaker
    • C08G63/60
    • C08G63/605
    • The invention relates to a class of copolyesters which display optical anisotropy in the molten state and to the shaped articles, fibers and films obtained from the optically anisotropic melts. The copolyesters comprise recurring structural units (a) independently each occurrence selected from the group consisting of Formulas I and II; recurring structural units (b) independently each occurrence selected from the group consisting of Formulas III and V; recurring structural units (c) independently each occurrence selected from the group consisting of Formula IV; and optionally recurring structural units (d) independently each occurrence selected from the group consisting of Formula VI: ##STR1## wherein R independently each occurrence is a chemically inert substituent.
    • 本发明涉及一种在熔融状态下显示光学各向异性的共聚酯类,以及由光学各向异性熔体获得的成型制品,纤维和薄膜。 所述共聚酯包含独立地每次出现的重复结构单元(a),其选自由式I和II组成的组; 重复结构单元(b)各自独立地选自由式III和V组成的组; 重复结构单元(c)各自独立地选自式IV; 和任选地重复的结构单元(d)独立地每次出现时选自由式VI组成的组:其中R独立地每次出现时,R 1独立地为 化学惰性取代基。