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US5536564A
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Biodegradable copolymers and plastic articles comprising biodegradable copolymers of 3-hydroxyhexanoate
Assignee: Meredian Inc
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Filing: 1995-06-06
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Granted: 1996-07-16
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Expires: 2015-06-06
Abstract
Abstract The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units (RRMU) wherein the first RRMU has the structure ##STR1## wherein R 1 is H or C 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 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.
Inventors
- 👤 Isao Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:40
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/62; B29; B29B; B29B7/00; B29B7/80; B29B7/88; B29B7/90; B29B7/92; C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08J; C08J5/00; C08J5/18; C08L; C08L67/00; C08L67/04; C09; C09J; C09J167/00; C09J167/04; C08J2367/00; C08J2367/04; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24785; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
77 words
A nonwoven fabric comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR9## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR10## ; and wherein at least 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 2
Dependent Claim
77 words
A nonwoven fabric comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR9## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR10## ; and wherein at least 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 3
Dependent Claim
98 words
An absorbent article comprising: a) a liquid pervious topsheet; b) a liquid impervious backsheet comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR11## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second monomer unit has the structure ##STR12## ; and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit; and c) an absorbent core positioned between the topsheet and the backsheet.
Claim 4
Dependent Claim
98 words
An absorbent article comprising: a) a liquid pervious topsheet; b) a liquid impervious backsheet comprising a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR11## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second monomer unit has the structure ##STR12## ; and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit; and c) an absorbent core positioned between the topsheet and the backsheet.
Claim 5
Dependent Claim
69 words
The absorbent article of claim 2 wherein the biodegradable copolymer comprises one or more additional randomly repeating monomer units having the structure ##STR13## wherein R 2 is H, or a C 1 -C 19 alkyl or alkenyl; and m is 1 or 2; and wherein the additional randomly repeating monomer units are not the same as the first randomly repeating monomer unit or the second randomly repeating monomer unit.
Claim 6
Dependent Claim
17 words
The absorbent article of claim 2, in the form of a disposable diaper, sanitary napkin, or pantiliner.
Claim 7
Dependent Claim
83 words
The absorbent article of claim 2, wherein the liquid pervious topsheet comprises a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR14## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second monomer unit has the structure ##STR15## , and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 8
Dependent Claim
101 words
The absorbent article of claim 2, wherein the absorbent article additionally comprises one or more elastic members disposed adjacent to the periphery of the diaper, wherein the elastic member comprises a biodegradable copolymer, wherein the biodegradable copolymer comprises at least two randomly repeating monomer units wherein the first randomly repeating monomer unit has the structure ##STR16## wherein R 1 is H or C 2 alkyl, and n is 1 or 2; the second monomer unit has the structure ##STR17## ; and wherein at least 50% of the random repeating monomer units have the structure of the first randomly repeating monomer unit.
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JPH0593318A
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JPH05230351A
Cited
WO1994000506A1
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |