Patent US3929937A successfully refreshed from Google Patents.
US3929937A
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Biodegradable shaped articles from a material comprising a particulate addition polymer in a matrix of a thermoplastic oxyalkanoyl polymer
Assignee: Union Carbide Corp
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Filing: 1974-09-06
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Granted: 1975-12-30
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Expires: 1994-09-06
Abstract
Abstract Shaped articles fabricated from material comprising particulate addition polymer, e.g., polyethylene, in a matrix of biodegradable thermoplastic oxyalkanoyl polymer, e.g., epsiloncaprolactone homopolymer. Such articles are useful as mulch film, transplanter containers, package containers, and the like.
Inventors
- 👤 Robert A Clendinning
- 👤 James E Potts
- 👤 William F Gorham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:44
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/30; A01G13/32; A01G13/33; C; C08; C08L; C08L67/00; C08L67/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
159 words
BIODEGRADABLE SHAPED ARTICLES COMPRISING A SHAPED COMPOSITION OF NORMALLY SOLID ADDITION POLYMER DISPERSED IN PARTICULATE FORM IN A MATRIX OF BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER, SAID ADDITION POLYMER HAVING BEEN SO DISPERSED IN SAID OXYALKANOYL POLYMER AT A TEMPERATURE BELOW THE SOFTENING TEMPERATURE OF SAID ADDITION POLYMER, SAID COMPOSITION COMPRISING FROM ABOUT 20 TO ABOUT 95 WEIGHT PERCENT OF SAID BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER AND FROM ABOUT 80 TO ABOUT 5 WEIGHT PERCENT OF SAID PARTICULATE, NORMALLY-SOLID ADDITION POLYMER, BASED ON THE TOTAL WEIGHT OF SAID COMPOSITION, SAID PARTICULATE, NORMALLY-SOLID ADDITION POLYMER POSSESSING A SOFTENING TEMPERATURE AT LEAST ABOUT 15*C. HIGHER THAN THE MELTING POINT OF SAID BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER, AND SAID BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER BEING CHARACTERIZED BY 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
Claim 2
Dependent Claim
159 words
BIODEGRADABLE SHAPED ARTICLES COMPRISING A SHAPED COMPOSITION OF NORMALLY SOLID ADDITION POLYMER DISPERSED IN PARTICULATE FORM IN A MATRIX OF BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER, SAID ADDITION POLYMER HAVING BEEN SO DISPERSED IN SAID OXYALKANOYL POLYMER AT A TEMPERATURE BELOW THE SOFTENING TEMPERATURE OF SAID ADDITION POLYMER, SAID COMPOSITION COMPRISING FROM ABOUT 20 TO ABOUT 95 WEIGHT PERCENT OF SAID BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER AND FROM ABOUT 80 TO ABOUT 5 WEIGHT PERCENT OF SAID PARTICULATE, NORMALLY-SOLID ADDITION POLYMER, BASED ON THE TOTAL WEIGHT OF SAID COMPOSITION, SAID PARTICULATE, NORMALLY-SOLID ADDITION POLYMER POSSESSING A SOFTENING TEMPERATURE AT LEAST ABOUT 15*C. HIGHER THAN THE MELTING POINT OF SAID BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER, AND SAID BIODEGRADABLE THERMOPLASTIC OXYALKANOYL POLYMER BEING CHARACTERIZED BY 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
Claim 3
Dependent Claim
30 words
The biodegradable shaped articles of claim 1 wherein said particulate, normally-solid addition polymer is a polymer of monomers selected from the group consisting of alkenes, alkyl 2-alkenoates, and mixtures thereof.
Claim 4
Dependent Claim
15 words
The biodegradable shaped articles of claim 2 wherein said recurring oxyalkanoyl units have the formula
Claim 5
Dependent Claim
50 words
The biodegradable shaped articles of claim 1 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 6
Dependent Claim
23 words
The biodegradable shaped articles of claim 4 wherein at least about 50 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 7
Dependent Claim
28 words
The biodegradable shaped articles of claim 5 wherein at least about 60 weight percent to about 100 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 8
Dependent Claim
26 words
The biodegradable shaped articles of claim 6 wherein at least about 80 to about 100 weight percent of said polymer is attributable to recurring oxycaproyl units.
Claim 9
Dependent Claim
23 words
The biodegradable shaped articles of claim 6 wherein said polymer has a reduced viscosity value of at least about 0.25 to about 3.
Claim 10
Dependent Claim
48 words
The biodegradable shaped articles of claim 7 wherein said composition comprises from about 25 to about 90 weight percent of said biodegradable thermoplastic oxyalkanoyl polymer and from about 75 to about 10 weight percent of said particulate, normally-solid addition polymer, based on the total weight of said composition.
Claim 11
Dependent Claim
16 words
the biodegradable shaped articles of claim 9 wherein said particulate, normally-solid addition polymer is a polyalkene.
Claim 12
Dependent Claim
12 words
The biodegradable shaped articles of claiM 10 wherein said polyalkene is polyethylene.
Claim 13
Dependent Claim
12 words
The biodegradable shaped articles of claim 10 wherein said polyalkene is polypropylene.
Claim 14
Dependent Claim
12 words
The biodegradable shaped articles of claim 10 wherein said polyalkene is polystyrene.
Claim 15
Dependent Claim
13 words
The biodegradable shaped articles of claim 9 in the form of a film.
Claim 16
Dependent Claim
13 words
The biodegradable shaped articles of claim 9 in the form of a container.
Claim 17
Dependent Claim
153 words
A process for fabricating biodegradable shaped articles which comprises: i. heating a mixture comprising particulate, normally-solid addition polymer and biodegradable thermoplastic oxyalkanoyl polymer, said addition polymer being adapted to being dispersed in said oxyalkanoyl polymer in particulate form; ii. said mixture comprising from about 20 to about 95 weight percent of said biodegradable thermoplastic oxyalkanoyl polymer and from about 80 to about 5 weight percent of said particulate, normally-solid addition polymer, based on the total weight of said mixture; iii. said particulate, normally-solid addition polymer possessing a softening temperature at least about 15*C. higher than the melting point of said biodegradable thermoplastic oxyalkanoyl polymer; iv. said biodegradable thermoplastic oxyalkanoyl polymer being characterized by 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
Claim 18
Dependent Claim
153 words
A process for fabricating biodegradable shaped articles which comprises: i. heating a mixture comprising particulate, normally-solid addition polymer and biodegradable thermoplastic oxyalkanoyl polymer, said addition polymer being adapted to being dispersed in said oxyalkanoyl polymer in particulate form; ii. said mixture comprising from about 20 to about 95 weight percent of said biodegradable thermoplastic oxyalkanoyl polymer and from about 80 to about 5 weight percent of said particulate, normally-solid addition polymer, based on the total weight of said mixture; iii. said particulate, normally-solid addition polymer possessing a softening temperature at least about 15*C. higher than the melting point of said biodegradable thermoplastic oxyalkanoyl polymer; iv. said biodegradable thermoplastic oxyalkanoyl polymer being characterized by 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
Claim 19
Dependent Claim
39 words
The process of claim 16 wherein said heating step is effected at a temperature about 5*C. above the melting point of said biodegradable thermoplastic oxyalkanoyl polymer but about 10*C. below the softening temperature of said particulate, normally-solid addition polymer.
Claim 20
Dependent Claim
45 words
The process of claim 17 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 recurring oxycaproyl units.
Claim 21
Dependent Claim
24 words
The process of claim 18 wherein at least about 50 weight percent of said biodegradable thermoplastic oxyalkanoyl polymer is attributable to recurring oxycaproyl units.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |