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US3867324A Expired / Lapsed US ⏱️ 0.0 years remaining

Environmentally degradable-biodegradable blend of an oxyalkanoyl polymer and an environmentally degradable ethylene polymer

Assignee: Union Carbide Corp
•
Filing: 1972-07-28
•
Granted: 1975-02-18
•
Expires: 1992-07-28
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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 environmentally 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 2026-10-29 15:20
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08L75/06; A; A01; A01C; A01C1/00; A01C1/04; A01C1/046; A01G; A01G9/00; A01G9/02; A01G9/021; A01G9/029; A01G9/0291; A01G9/14; A01G9/1438; C08K; C08K3/00; C08K3/10; C08K3/16; C08K3/18; C08K3/24; C08K3/28; C08K3/30; C08K5/00; C08K5/0008; C08K5/0033; C08K5/04; C08K5/09; C08K5/098; C08K5/16; C08K5/17; C08L23/00; C08L23/02; C08L23/04; C08L67/00; C08L2201/00; C08L2201/06; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25; Y02A40/28; Y10; Y10S; Y10S260/00; Y10S260/43

Claims Analysis

Total Claims: 33
Claim 1
Independent Claim 63 words
A BIODERGRADABLE-ENVIRONMENTALLY DEGRADABLE BLEND COMPRISING I. FROM ABOUT 5 TO ABOUT 95 WEIGHT PER CENT OF BIODEGRADABLE THERMOPLASTIC 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 PER CENT OF SAID BIODERGRADABLE THERMOPLASTIC POLYMER IS ATTRIBUTABLE TO RECURRING OXYALKANOYL UNITS OF THE FORMULA
Claim 2
Dependent Claim 63 words
A BIODERGRADABLE-ENVIRONMENTALLY DEGRADABLE BLEND COMPRISING I. FROM ABOUT 5 TO ABOUT 95 WEIGHT PER CENT OF BIODEGRADABLE THERMOPLASTIC 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 PER CENT OF SAID BIODERGRADABLE THERMOPLASTIC POLYMER IS ATTRIBUTABLE TO RECURRING OXYALKANOYL UNITS OF THE FORMULA
Claim 3
Dependent Claim 27 words
The biodegradable-environmentally degradable blend of claim 1 wherein said biodegradable thermoplastic polymer is characterized by at least 10 weight percent of recurring oxycaproyl units of the formula
Claim 4
Dependent Claim 45 words
The biodegradable-environmentally degradable blend of claim 2 wherein said biodegradable thermoplastic polymer has a reduced viscosity value of from about 0.2 to about 8 and is further characterized in that at least about 20 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 5
Dependent Claim 25 words
The biodegradable-environmentally degradable blend of claim 3 wherein at least about 50 weight percent of said biodegradable thermoplastic polymer is attributable to recurring oxycaproyl units.
Claim 6
Dependent Claim 28 words
The biodegradable-environmentally degradable blend of claim 4 wherein at least about 70 to about 100 weight percent of said biodegradable thermoplastic polymer is attributable to recurring oxycaproyl units.
Claim 7
Dependent Claim 35 words
The biodegradable-environmentally degradable blend of claim 1 comprising from about 10 to about 90 weight percent of said biodegradable thermoplastic polymer characterized by at least 50 weight percent of recurring oxycaproyl units of the formula
Claim 8
Dependent Claim 15 words
The biodegradable-environmentally degradable blend of claim 6 wherein said normally-solid thermoplastic ethylene polymer is polyethylene.
Claim 9
Dependent Claim 18 words
The biodegradable-environmentally degradable blend of claim 1 wherein said environmentally degradable ethylene polymer based composition contains an antioxidant.
Claim 10
Dependent Claim 50 words
The biodegradable-environmentally degradable blend of claim 8 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 12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 1.
Claim 12
Dependent Claim 12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 2.
Claim 13
Dependent Claim 12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 4.
Claim 14
Dependent Claim 12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 5.
Claim 15
Dependent Claim 12 words
Biodegradable-environmentally degradable articles of manufacture from the blend claimed in claim 7.
Claim 16
Dependent Claim 15 words
The biodegradable-environmentally degradable articles of manufacture of claim 12 in the form of a container.
Claim 17
Dependent Claim 15 words
The biodegradable-environmentally degradable articles of manufacture of claim 12 in the form of a film.
Claim 18
Dependent Claim 15 words
The biodegradable-environmentally degradable articles of manufacture of claim 12 in the form of packaging material.
Claim 19
Dependent Claim 16 words
A biodegradable-environmentally degradable blend as in claim 9 in which said auto-oxidative susceptible additive is polypropylene.
Claim 20
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 1 in which said polyvalent transition metal salt comprises a salt of cobalt.
Claim 21
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 1 in which said polyvalent transition metal salt comprises a salt of iron.
Claim 22
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 19 in which said polyvalent transition metal salt comprises a salt of iron.
Claim 23
Dependent Claim 51 words
A biodegradable-environmentally degradable blend as in claim 1 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 24
Dependent Claim 16 words
A biodegradable-environmentally degradable blend as in claim 22 in which said auto-oxidative susceptible additive is polypropylene.
Claim 25
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 22 in which said polyvalent transition metal salt comprises a salt of cobalt.
Claim 26
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 22 in which said polyvalent transition metal salt comprises a salt of iron.
Claim 27
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 24 in which said polyvalent transition metal salt comprises a salt of iron.
Claim 28
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 8 in which said polyvalent transition metal salt comprises a salt of cobalt.
Claim 29
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 8 in which said polyvalent transition metal salt comprises a salt of iron.
Claim 30
Dependent Claim 20 words
A biodegradable-environmentally degradable blend as in claim 27 in which said polyvalent transition metal salt comprises a salt of iron.
Claim 31
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 32
Dependent Claim 27 words
The biodegradable-environmentally degradable blend of claim 1 wherein said biodegradable thermoplastic polymer is characterized by at least 10 weight percent of recurring oxycaproyl units of the formula
Claim 33
Dependent Claim 15 words
The biodegradable-environmentally degradable articles of manufacture of claim 10 in the form of a container.

References Cited (Backward Citations)

US3592877A Cited
US3676401A Cited
US3454510A Cited
US3534120A Cited
US3632687A Cited
US3636956A Cited
US3734979A Cited
US3767638A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-02-17 1978-08-19 1979-02-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-02-17 1982-08-19 1983-02-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-02-17 1986-08-19 1987-02-18 $7700.00 Window Closed / Lapsed

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