Patent US5489470A successfully refreshed from Google Patents.
US5489470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable copolymers and plastic articles comprising biodegradable copolymers
Assignee: Danimer Ipco LLC
•
Filing: 1995-04-13
•
Granted: 1996-02-06
•
Expires: 2015-04-13
Abstract
Abstract 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 1 is H, or C 1 or C 2 alkyl, and n is 1 or 2; the second RRMU has the structure ##STR2## wherein R 2 is a C 4 -C 19 alkyl or alkenyl; 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.
Inventors
- 👤 Isao Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:08
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/62; 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; Y10S521/00; Y10S521/916; Y10T; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/671; Y10T442/696
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 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 ##STR14## wherein R 1 is H, or C 1 or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR15## wherein R 2 is a C 4 -C 19 alkyl or alkenyl; and wherein at least 50% of the randomly 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 2
Dependent Claim
114 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 ##STR14## wherein R 1 is H, or C 1 or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR15## wherein R 2 is a C 4 -C 19 alkyl or alkenyl; and wherein at least 50% of the randomly 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 3
Dependent Claim
69 words
The absorbent article of claim 1 wherein the biodegradable copolymer comprises one or more additional randomly repeating monomer units having the structure ##STR16## wherein R 3 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 4
Dependent Claim
17 words
The absorbent article of claim 1, in the form of a disposable diaper, sanitary napkin, or pantiliner.
Claim 5
Dependent Claim
99 words
The absorbent article of claim 1, 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 ##STR17## wherein R 1 is H, or C 1 or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR18## wherein R 2 is a C 4 -C 19 alkyl or alkenyl; and wherein at least 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
Claim 6
Dependent Claim
115 words
The absorbent article of claim 1, 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 monomer unit has the structure ##STR19## wherein R 1 is H, or C 1 or C 2 alkyl, and n is 1 or 2; the second randomly repeating monomer unit has the structure ##STR20## wherein R 2 is a C 4 -C 19 alkyl or alkenyl; and wherein at least 50% of the randomly repeating monomer units have the structure of the first randomly repeating monomer unit.
References Cited (Backward Citations)
DE2909145A1
Cited
US4393167A
Cited
US4477654A
Cited
US4603070A
Cited
US4880592A
Cited
US5135859A
Cited
US5004664A
Cited
EP0400855A1
Cited
EP0416624A2
Cited
WO1991013207A1
Cited
JPH03277656A
Cited
WO1991018994A1
Cited
US5023316A
Cited
US5191016A
Cited
JPH0489004A
Cited
JPH04136066A
Cited
JPH04136067A
Cited
WO1992009211A1
Cited
WO1992009210A1
Cited
DE4040158A1
Cited
US5231148A
Cited
WO1992018553A1
Cited
US5191037A
Cited
DE4212801A1
Cited
WO1992019747A1
Cited
WO1992021708A1
Cited
JPH0517590A
Cited
WO1993002194A1
Cited
JPH0534343A
Cited
EP0533144A2
Cited
JPH0593318A
Cited
JPH0593317A
Cited
EP0540182A2
Cited
US5135966A
Cited
JPH05230351A
Cited
EP0560014A1
Cited
US5391423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-05 | 1999-08-07 | 2000-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-05 | 2003-08-07 | 2004-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-05 | 2007-08-07 | 2008-02-06 | $7700.00 | Window Closed / Lapsed |