US5786408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable polyester resin composition, and a biodegradable molded article
Assignee: Daicel Corp
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Filing: 1996-06-20
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Granted: 1998-07-28
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Expires: 2016-06-20
Abstract
Abstract Disclosed are a biodegradable polyester resin composition, and a biodegradable article molded from the composition. The polyester resin composition and the molded article of the present invention are excellent in biodegradability without any loss of mechanical properties.
Inventors
- 👤 Takayuki Kuroda
- 👤 Masahiko Ono
- 👤 Terumasa Daito
- 👤 Kazushi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:49
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/04; C08L75/00; C08L75/04; C08L75/06; C08L2201/00; C08L2201/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
A polyester resin composition having biodegradability as regulated by JIS K6950 which comprises from 1 to 200 parts by weight of a polylactone resin and 100 parts by weight of an aliphatic polyester resin wherein the aliphatic polyester resin is prepared by a polycondensation reaction between an aliphatic polyvalent alcohol and an aliphatic dicarboxylic acid, wherein said aliphatic polyester resin contains a residual croup derived from an aliphatic polyisocyanate compound.
Claim 2
Dependent Claim
70 words
A polyester resin composition having biodegradability as regulated by JIS K6950 which comprises from 1 to 200 parts by weight of a polylactone resin and 100 parts by weight of an aliphatic polyester resin wherein the aliphatic polyester resin is prepared by a polycondensation reaction between an aliphatic polyvalent alcohol and an aliphatic dicarboxylic acid, wherein said aliphatic polyester resin contains a residual croup derived from an aliphatic polyisocyanate compound.
Claim 3
Dependent Claim
28 words
A polyester resin composition as set forth in claim 1, wherein a dicarboxylic acid unit in said aliphatic polyester resin is derived from succinic acid or anhydride thereof.
Claim 4
Dependent Claim
24 words
A polyester resin composition as set forth in claim 1, wherein a polyvalent alcohol unit in said aliphatic polyester resin is derived from 1,4-butanediol.
Claim 5
Dependent Claim
21 words
A polyester resin composition as set forth in any one of claims 1, wherein said aliphatic polyisocyanate compound is hexamethylene diisocyanate.
Claim 6
Dependent Claim
31 words
A polyester resin composition as set forth in claim 1, wherein said aliphatic polyester resin contains units of succinic acid or anhydride thereof, units of 1,4-butanediol, and units of hexamethylene diisocyanate.
Claim 7
Dependent Claim
51 words
A polyester resin composition as set forth in claim 1, wherein said polylactone resin has relative viscosity of 1.9 to 2.5 measured with a capillary viscometer according to Japanese Industrial Standard K6726 or a number average molecular weight of 10000 to 70000 measured based on a standard polystyrene with a GPC.
Claim 8
Dependent Claim
24 words
A polyester resin composition as set forth in any one of claims 1 and 6, wherein said polylactone resin is derived from E caprolactone.
Claim 9
Dependent Claim
12 words
A article molded from the biodegradable polyester resin composition of claim 1.
Claim 10
Dependent Claim
27 words
A article as set forth in claim 8, wherein said article is any one of fibers, yarns, textiles or cloths, ropes, nets, films, bottles, pipes, and containers.
Claim 11
Dependent Claim
48 words
A article as set forth in claim 8, wherein said article is any one of disposable cups for food and drink, disposable knives, spoons, forks, disposable and separable chopsticks for eating, trays, pots for a seed bed, syringes, stakes for temporarily fixing lawn mats, and tees for golfing.
Claim 12
Dependent Claim
22 words
A article as set forth in claim 8, wherein said article is a card having a magnetically-sensitive layer and/or a thermally-sensitive layer.
Claim 13
Dependent Claim
17 words
A article as set forth in claim 8, wherein said article is a card prepared by laminating.
Claim 14
Dependent Claim
17 words
A article as set forth in claim 8, wherein said article is a card prepared by biaxially-stretching.
Claim 15
Dependent Claim
16 words
A article as set forth in claim 8, wherein said article is a card containing fillers.
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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) | 2001-07-27 | 2002-01-26 | 2002-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-27 | 2006-01-26 | 2006-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-27 | 2010-01-26 | 2010-07-28 | $7700.00 | Window Closed / Lapsed |