US3931068A
Expired / Lapsed
US
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Blends of biodegradable thermoplastic oxyalkanoyl polymer, a naturally occurring biodegradable product, filler and plastic additive
Assignee: Union Carbide Corp
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Filing: 1974-07-15
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Granted: 1976-01-06
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Expires: 1994-07-15
Abstract
Abstract Blends comprising biodegradable thermoplastic oxyalkanoyl polymer, e.g., epsilon-caprolactone polymer, and naturally occurring biodegradable product, e.g., tree bark. These novel blends are useful in the production of shaped articles such as mulch film, transplanter containers, package containers, and the like.
Inventors
- 👤 Robert A. Clendinning
- 👤 James E. Potts
- 👤 Walter D. Niegisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:40
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/32; A01G13/33; C; C08; C08L; C08L67/00; C08L67/04; C09; C09K; C09K17/00; C09K17/52; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/28; Y10; Y10S; Y10S220/00; Y10S220/03
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
128 words
A blend comprising (i) from about 3 to about 97 weight percent of biodegradable thermoplastic oxyalkanoyl polymer, said polymer having a reduced viscosity value of at least about 0.1 and upwards to about 12 and being further characterized in that at least about 10 weight percent of said thermoplastic oxyalkanoyl polymer is attributable to recurring oxyalkanoyl units of the formula ##EQU15## wherein x is an integer having a value of 2 to 7, with the proviso that x does not equal 3; (ii) from less than 97 to about 3 weight percent of naturally occurring biodegradable product; and (iii) more than 0 to about 75 weight percent of ingredients of the group consisting of plastic additives, fillers, and mixtures thereof, based on the total weight of said blend.
Claim 2
Dependent Claim
128 words
A blend comprising (i) from about 3 to about 97 weight percent of biodegradable thermoplastic oxyalkanoyl polymer, said polymer having a reduced viscosity value of at least about 0.1 and upwards to about 12 and being further characterized in that at least about 10 weight percent of said thermoplastic oxyalkanoyl polymer is attributable to recurring oxyalkanoyl units of the formula ##EQU15## wherein x is an integer having a value of 2 to 7, with the proviso that x does not equal 3; (ii) from less than 97 to about 3 weight percent of naturally occurring biodegradable product; and (iii) more than 0 to about 75 weight percent of ingredients of the group consisting of plastic additives, fillers, and mixtures thereof, based on the total weight of said blend.
Claim 3
Dependent Claim
14 words
The blend of claim 1 wherein said recurring oxyalkanoyl units have the formula ##EQU16##
Claim 4
Dependent Claim
48 words
The blend of claim 2 wherein said biodegradable thermoplastic oxyalkanoyl polymer has a reduced viscosity value of at least about 0.2 to about 8 and is further characterized in that at least about 20 weight percent of said polymer is attributable to the recurring oxyalkanoyl unit shown therein.
Claim 5
Dependent Claim
21 words
The blend of claim 3 wherein at least about 50 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 6
Dependent Claim
24 words
The blend of claim 4 wherein at least about 80 to about 100 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 7
Dependent Claim
21 words
The blend of claim 4 wherein said polymer has a reduced viscosity value of at least about 0.25 to about 3.
Claim 8
Dependent Claim
43 words
The blend of claim 4 comprising (i) from about 10 to about 90 weight percent of biodegradable thermoplastic oxycaproyl polymer, and (ii) from about 10 to about 90 weight percent of naturally occurring biodegradable product, based on the total weight of said blend.
Claim 9
Dependent Claim
66 words
The blend of claim 7 comprising (i) from about 20 to about 80 weight percent of biodegradable thermoplastic oxycaproyl polymer, (ii) from about 20 to about 80 weight percent of naturally occurring biodegradable product, and (iii) from greater than 0 to about 60 weight percent of ingredients of the group consisting of plastic additives, fillers, and mixtures thereof, based on the total weight of said blend.
Claim 10
Dependent Claim
14 words
The blend of claim 8 wherein said naturally occurring biodegradable product is tree bark.
Claim 11
Dependent Claim
14 words
The blend of claim 9 wherein said naturally occurring biodegradable product is shredded wood.
Claim 12
Dependent Claim
13 words
The blend of claim 9 wherein said tree bark is Douglas Fir bark.
Claim 13
Dependent Claim
10 words
Articles of manufacture from the blend claimed in claim 1.
Claim 14
Dependent Claim
10 words
Articles of manufacture from the blend claimed in claim 2.
Claim 15
Dependent Claim
10 words
Articles of manufacture from the blend claimed in claim 3.
Claim 16
Dependent Claim
10 words
Articles of manufacture from the blend claimed in claim 4.
Claim 17
Dependent Claim
10 words
Articles of manufacture from the blend claimed in claim 5.
Claim 18
Dependent Claim
13 words
The articles of manufacture of claim 16 in the form of a container.
Claim 19
Dependent Claim
13 words
The articles of manufacture of claim 16 in the form of a film.
Claim 20
Dependent Claim
13 words
The articles of manufacture of claim 16 in the form of packaging material.
Claim 21
Dependent Claim
126 words
A blend comprising (i) from about 3 to about 97 weight percent of biodegradable thermoplastic oxyalkanoyl polymer, said polymer having a reduced viscosity value of at least about 0.1 and upwards to about 12 and being further characterized in that at least about 10 weight percent of said thermoplastic oxyalkanoyl polymer is attributable to recurring oxyalkanoyl units of the formula ##EQU17## wherein x is an integer having a value of 2 to 7, with the proviso that x does not equal 3; (ii) from less than 97 to about 3 weight percent of soybean meal; and, (iii) more than 0 to about 75 weight percent of ingredients of the group consisting of plastic additives, fillers, and mixtures thereof, based on the total weight of said blend.
Claim 22
Dependent Claim
126 words
A blend comprising (i) from about 3 to about 97 weight percent of biodegradable thermoplastic oxyalkanoyl polymer, said polymer having a reduced viscosity value of at least about 0.1 and upwards to about 12 and being further characterized in that at least about 10 weight percent of said thermoplastic oxyalkanoyl polymer is attributable to recurring oxyalkanoyl units of the formula ##EQU17## wherein x is an integer having a value of 2 to 7, with the proviso that x does not equal 3; (ii) from less than 97 to about 3 weight percent of soybean meal; and, (iii) more than 0 to about 75 weight percent of ingredients of the group consisting of plastic additives, fillers, and mixtures thereof, based on the total weight of said blend.
Claim 23
Dependent Claim
14 words
The blend of claim 20 wherein said recurring oxyalkanoyl units have the formula ##EQU18##
Claim 24
Dependent Claim
48 words
The blend of claim 21 wherein said biodegradable thermoplastic oxyalkanoyl polymer has a reduced viscosity value of at least about 0.2 to about 8 and is further characterized in that at least about 20 weight percent of said polymer is attributable to the recurring oxyalkanoyl unit shown therein.
Claim 25
Dependent Claim
21 words
The blend of claim 22 wherein at least about 50 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 26
Dependent Claim
24 words
The blend of claim 23 wherein at least about 80 to about 100 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 27
Dependent Claim
21 words
The blend of claim 23 wherein said polymer has a reduced viscosity value of at least about 0.25 to about 3.
Claim 28
Dependent Claim
41 words
The blend of claim 23 comprising (i) from about 10 to about 90 weight percent of biodegradable thermoplastic oxycaproyl polymer, and (ii) from about 10 to about 90 weight percent of soybean meal, based on the total weight of said blend.
Claim 29
Dependent Claim
10 words
Articles of manufacture from the blend claimed in claim 26.
Claim 30
Dependent Claim
13 words
The articles of manufacture of claim 27 in the form of a container.
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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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |