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US3901838A Expired / Lapsed US ⏱️ 0.0 years remaining

Environmentally degradable biodegradable blends of a dialkanoyl polymer and an environmentally degradable ethylene polymer

Assignee: Union Carbide Corp
•
Filing: 1974-07-15
•
Granted: 1975-08-26
•
Expires: 1994-07-15
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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 2026-10-24 06:31
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.

References Cited (Backward Citations)

US3676401A Cited
US3435093A Cited
US3454510A Cited
US3562200A Cited
US3642945A Cited
US3636956A Cited
US3825620A Cited
US3767638A Cited
US3769260A Cited

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

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