US3935141A
Expired / Lapsed
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Environmentally degradable ethylene polymeric compositions
Assignee: Union Carbide Corp
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Filing: 1972-06-28
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Granted: 1976-01-27
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Expires: 1992-06-28
Abstract
Abstract An environmentally degradable polymer composition comprising an ethylene polymer base resin, and a synergistic combination of an auto-oxidative polymer or low molecular weight organic compound; certain polyvalent transition metal salt; and an antioxidant additive for the ethylene polymer. A product of this composition when discarded to the environment is caused to deteriorate by the action of the elements, thereby hastening the deterioration of litter.
Inventors
- 👤 James Edward Potts
- 👤 Stephen Watson Cornell
- 👤 Albert Martin Sracic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0033; C08K5/04; C08K5/09; C08K5/098; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L2207/00; C08L2207/06; C08L2207/066; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
130 words
An environmentally degradable polymer composition comprising, based on the total weight of said composition, a major portion by weight of ethylene polymer as the base resin, about 0.01 to about 40 percent by weight of at least one 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, at least one salt of at least one polyvalent metal selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc and cerium, in such amounts as to provide about 0.002 to about 2.0 percent by weight of the metal atom, and about 0.0025 to about 1 percent by weight of antioxidant for said ethylene polymer.
Claim 2
Dependent Claim
130 words
An environmentally degradable polymer composition comprising, based on the total weight of said composition, a major portion by weight of ethylene polymer as the base resin, about 0.01 to about 40 percent by weight of at least one 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, at least one salt of at least one polyvalent metal selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc and cerium, in such amounts as to provide about 0.002 to about 2.0 percent by weight of the metal atom, and about 0.0025 to about 1 percent by weight of antioxidant for said ethylene polymer.
Claim 3
Dependent Claim
53 words
A composition as claimed in claim 1 wherein the auto-oxidative susceptible additive is an auto-oxidative susceptible polymer wherein the predominance of the repeating units have 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 4
Dependent Claim
49 words
A composition as claimed in claim 1 wherein the auto-oxidative susceptible additive is an autooxidative susceptible low molecular organic compound 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 5
Dependent Claim
50 words
A composition as claimed in claim 1, wherein the auto-oxidative susceptible additive is present in an amount from 0.05 to about 20 percent by weight and wherein the salt of the polyvalent metal is present in an amount to impart from 0.005 to about 1.0 weight percent of metal atom.
Claim 6
Dependent Claim
20 words
A composition as claimed in claim 1 wherein the polyvalent metal salt is an organic salt of said polyvalent metal.
Claim 7
Dependent Claim
15 words
A composition as claimed in claim 1 wherein said base resin is an ethylene homopolymer.
Claim 8
Dependent Claim
15 words
A composition as claimed in claim 1 wherein said base resin is an ethylene copolymer.
Claim 9
Dependent Claim
24 words
A composition as claimed in claim 3 wherein said hydrogen atom is present in an allylic, benzylic, tertiary aliphatic, aldehydo, alpha-oxyhydrocarbyl or alpha-halohydrocarbyl group.
Claim 10
Dependent Claim
23 words
A composition as claimed in claim 3 wherein said auto-oxidative susceptible low molecular weight organic compound has a molecular weight less than 5,000.
Claim 11
Dependent Claim
25 words
A composition as claimed in claim 2 wherein said auto-oxidative susceptible polymer is a polymer of an alpha-olefin having from 3 to 20 carbon atoms.
Claim 12
Dependent Claim
14 words
A composition as claimed in claim 10 wherein said auto-oxidative susceptible polymer is polypropylene.
Claim 13
Dependent Claim
16 words
A composition as claimed in claim 2 wherein said auto-oxidative susceptible polymer is a poly(alkylene oxide).
Claim 14
Dependent Claim
14 words
A composition as claimed in claim 12 wherein said poly(alkylene oxide) is poly(ethylene oxide).
Claim 15
Dependent Claim
20 words
A composition as claimed in claim 3 wherein said auto-oxidative susceptible low molecular weight compound is an unsaturated fatty acid.
Claim 16
Dependent Claim
19 words
A composition as claimed in claim 5 wherein said metal salt is an octoate, naphthenate, acetate, stearate or acetylacetonate.
Claim 17
Dependent Claim
32 words
A composition as claimed in claim 1 wherein the auto-susceptible additive is present in an amount of from 0.1 to about 10 weight percent, based on the weight of the total composition.
Claim 18
Dependent Claim
39 words
A composition as claimed in claim 1 wherein the salt of the polyvalent metal is present in an amount to impart from 0.01 to about 0.1 percent of the metal atom based on the weight of the total composition.
Claim 19
Dependent Claim
59 words
A composition as claimed in claim 3 wherein the auto-oxidative susceptible low molecular weight organic compound is present in an amount of from 0.1 to 10 percent by weight and the salt of the polyvalent metal is present in an amount to impart from 0.01 to 0.1 weight percent of metal atom based on the weight of total composition.
Claim 20
Dependent Claim
15 words
A composition as claimed in claim 1 wherein the polyvalent metal is cobalt or iron.
Claim 21
Dependent Claim
15 words
A composition as claimed in claim 1 wherein a combination of polyvalent metals is present.
Claim 22
Dependent Claim
12 words
The composition of claim 1 in the form of a shaped article.
Claim 23
Dependent Claim
12 words
The shaped article of claim 21 in the form of a film.
Claim 24
Independent Claim
120 words
A method for producing a degradable polymer composition comprising the steps of a. dryblending to a uniform homogeneous mass i. a masterbatch of ethylene polymer as the base resin, antioxidant for said base resin and at least one 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 with ii. a masterbatch of said base resin, and antioxidant for said base resin and at least one salt of at least one polyvalent metal selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc and cerium and b. then melt blending the dry blend.
Claim 25
Independent Claim
120 words
A method for producing a degradable polymer composition comprising the steps of a. dryblending to a uniform homogeneous mass i. a masterbatch of ethylene polymer as the base resin, antioxidant for said base resin and at least one 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 with ii. a masterbatch of said base resin, and antioxidant for said base resin and at least one salt of at least one polyvalent metal selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc and cerium and b. then melt blending the dry blend.
Claim 26
Dependent Claim
19 words
A method as claimed in claim 23 wherein said masterbatches are blended with an additional amount of ethylene polymer.
Claim 27
Dependent Claim
19 words
A method as claimed in claim 23 wherein the metal atom is coated onto an inert carrier before blending.
Claim 28
Dependent Claim
15 words
The shaped article of claim 22 in the form of a translucent to transparent film.
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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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |