C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/08 (2006.01) A61L 15/26 (2006.01) A61L 15/62 (2006.01) B32B 27/12 (2006.01) C08J 5/18 (2006.01) C08L 67/04 (2006.01) C09J 167/04 (2006.01)
Patent
CA 2181795
The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units (RRMU) wherein the first RRMU has structure (I) wherein R1 is H or C2 alkyl, and n is 1 or 2; the second RRMU has structure (II); and wherein at least 50 % of the RRMUs have the structure of the first RRMU. The present invention further relates to plastic articles comprising said biodegradable PHA copolymers. 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.
L'invention se rapporte à des copolymères PHA (polyhydroxyalkanoate) biodégradables comprenant au moins deux motifs monomères à répétition aléatoire (MMRA), dans lesquels le premier MMRA présente la structure (I) où R?2¿ est un H ou un alkyle en C¿2?, et n est égal à 1 ou à 2; et le deuxième MMRA présente la structure (II) et dans lesquels au moins 50 % des MMRA ont la structure du premier MMRA. L'invention concerne également des articles plastiques comprenant lesdits copolymères PHA biodégradables. L'invention concerne en outre un article absorbant comprenant une feuille supérieure perméable aux liquides, une feuille postérieure imperméable aux liquides renfermant un film contenant un PHA selon l'invention, et une âme absorbante positionnée entre la feuille supérieure et la feuille postérieure.
Dimock Stratton Llp
The Procter & Gamble Company
LandOfFree
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