Patent US3901838A successfully refreshed from Google Patents.
US3901838A
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Environmentally degradable biodegradable blends of a dialkanoyl polymer and an environmentally degradable ethylene polymer
Assignee: Union Carbide Corp
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Filing: 1974-07-15
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Granted: 1975-08-26
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Expires: 1994-07-15
Abstract
Abstract Novel polymeric blends which are capable of being fabricated into useful and novel consumer-type and industrial-type plastic products. After the useful life of such products they can be discarded. The ambient surrounding elements, including microorganisms and sunlight, thereafter cause the discarded products to degrade. The novel blends comprise a biodegradable thermoplastic polymer, e.g., poly(epsilon-caprolactone) or poly(ethylene adipate), and an evironmentally degradable normally-solid ethylene polymer.
Inventors
- 👤 Robert A Clendinning
- 👤 James E Potts
- 👤 Stephen W Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:21
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08K; C08K3/00; C08K3/01; C08K3/012; C08K3/10; C08K5/00; C08K5/0008; C08K5/0033; C08K5/04; C08K5/09; C08K5/098; C08L67/00; C08L75/00; C08L75/04; C08L75/06; C08L2201/00; C08L2201/06; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
61 words
A BIODEGRADABLE-ENVIRONMENTALLY DEGRADABLE BLEND COMPRISING I. FROM ABOUT 5 TO ABOUT 95 WEIGHT PRECENT OF BIODEGRADABLE THERMOPLASTIC POLMER, 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 BIODEGRADABLE THERMOPLASTIC POLYMER IS ATTRIBUTABLE TO RECURRING DIALKANOYL UNITS OF THE FORMULA
Claim 2
Dependent Claim
61 words
A BIODEGRADABLE-ENVIRONMENTALLY DEGRADABLE BLEND COMPRISING I. FROM ABOUT 5 TO ABOUT 95 WEIGHT PRECENT OF BIODEGRADABLE THERMOPLASTIC POLMER, 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 BIODEGRADABLE THERMOPLASTIC POLYMER IS ATTRIBUTABLE TO RECURRING DIALKANOYL UNITS OF THE FORMULA
Claim 3
Dependent Claim
24 words
The biodegradable-environmentally degradable blend of claim 1 wherein said biodegradable thermoplastic polymer is characterized by at least 50 weight percent of recurring dialkanoyl units.
Claim 4
Dependent Claim
35 words
The biodegradable-environmentally degradable blend of claim 1 wherein said biodegradable thermoplastic polymer is formed by esterifying aliphatic diol containing from 2 to 8 carbon atoms with alkanedioic acid containing from 2 to 12 carbon atoms.
Claim 5
Dependent Claim
15 words
The biodegradable-environmentally degradable blend of claim 1 wherein said normally-solid thermoplastic ethylene polymer is polyethylene.
Claim 6
Dependent Claim
15 words
The biodegradable-environmentally degradable blend of claim 2 wherein said normally-solid thermoplastic ethylene polymer is polyethylene.
Claim 7
Dependent Claim
18 words
The biodegradable-environmentally degradable blend of claim 1 wherein said environmentally degradable ethylene polymer based composition contains an antioxidant.
Claim 8
Dependent Claim
18 words
The biodegradable-environmentally degradable blend of claim 5 wherein said environmentally degradable ethylene polymer based composition contains an antioxidant.
Claim 9
Dependent Claim
50 words
The biodegradable-environmentally degradable blend of claim 6 wherein said environmentally degradable ethylene polymer based composition contains therein an auto-oxidative susceptible additive having at least one hydrogen atom bonded to a carbon atom having an auto-oxidative susceptibility greater than that of a hydrogen atom bonded to a normal secondary carbon atom.
Claim 10
Dependent Claim
50 words
The biodegradable-environmentally degradable blend of claim 7 wherein said environmentally degradable ethylene polymer based composition contains therein an auto-oxidative susceptible additive having at least one hydrogen atom bonded to a carbon atom having an auto-oxidative susceptibility greater than that of a hydrogen atom bonded to a normal secondary carbon atom.
Claim 11
Dependent Claim
41 words
A biodegradable-environmentally degradable blend as in claim 1 comprising i. from about 25 to about 75 weight percent of said biodegradable thermoplastic polymer, and ii. from about 25 to about 75 weight percent of said environmentally degradable ethylene polymer based composition.
Claim 12
Dependent Claim
20 words
A biodegradable-environmentally degradable blend as in claim 10 further comprising up to 50 weight percent of naturally occurring biodegradable product.
Claim 13
Dependent Claim
15 words
The biodegradable-environmentally degradable blend of claim 11 wherein said normally-solid thermoplastic ethylene polymer is polyethylene.
Claim 14
Dependent Claim
18 words
The biodegradable-environmentally degradable blend of claim 11 wherein said environmentally degradable ethylene polymer based composition contains an antioxidant.
Claim 15
Dependent Claim
50 words
The biodegradable-environmentally degradable blend of claim 13 wherein said environmentally degradable ethylene polymer based composition contains therein an auto-oxidative susceptible additive having at least one hydrogen atom bonded to a carbon atom having an auto-oxidative susceptibility greater than that of a hydrogen atom bonded to a normal secondary carbon atom.
Claim 16
Dependent Claim
12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 1.
Claim 17
Dependent Claim
12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 2.
Claim 18
Dependent Claim
12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 5.
Claim 19
Dependent Claim
12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 7.
Claim 20
Dependent Claim
15 words
The biodegradable-environmentally degradable articles of manufacture of claim 16 in the form of a container.
Claim 21
Dependent Claim
15 words
The biodegradable-environmentally degradable articles of manufacture of claim 16 in the form of a film.
Claim 22
Dependent Claim
15 words
The biodegradable-environmentally degradable articles of manufacture of claim 16 in the form of packaging material.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |