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    • 54. 发明授权
    • Biodegradable PHA copolymers
    • 可生物降解的PHA共聚物
    • US6077931A
    • 2000-06-20
    • US217734
    • 1998-12-21
    • Isao Noda
    • Isao Noda
    • C08G63/08C08L101/16C08G63/06C08G63/12
    • C08G63/08
    • The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units. The present invention further relates to a plastic article comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units (RRMU) wherein the first RRMU has the structure ##STR1## wherein R.sup.1 is H, or C.sub.1 or C.sub.2 alkyl, and n is 1 or 2; the second RRMU has the structure ##STR2## and wherein at least 50% of the RRMUs have the structure of the first RRMU. The present invention further relates to an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet comprising a film comprising a PHA of the present invention and an absorbent core positioned between the topsheet and the backsheet.
    • 本发明涉及包含至少两个随机重复的单体单元的可生物降解的PHA共聚物。 本发明还涉及包含可生物降解的共聚物的塑料制品,其中所述可生物降解共聚物包含至少两个随机重复的单体单元(RRMU),其中第一RRMU具有其中R 1为H或C 1或C 2烷基的结构,n为 1或2; 第二RRMU具有结构,并且其中至少50%的RRMU具有第一RRMU的结构。 本发明还涉及一种吸收性物品,其包括透液性顶片,不透液体的底片,其包含由本发明的PHA构成的膜和位于顶片与底片之间的吸收芯。