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US4215035A
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Thermally stable sulfur dioxide-ethylene-vinyl ester terpolymers and process for preparing same
Assignee: Equistar Chemicals LP
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Filing: 1979-04-11
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Granted: 1980-07-29
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Expires: 1999-04-11
Abstract
Abstract Sulfur dioxide-ethylene-vinyl ester terpolymers exhibiting improved thermal stability are prepared by substantially uniformly incorporating therein a thermal stability-imparting amount of at least one inorganic oxygen-containing metal compound in which the metal is an alkali metal, alkaline earth metal or zinc.
Inventors
- 👤 Leroy J. Memering
- 👤 Lorrin W. Pyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:36
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22; C08L; C08L81/00; C08L81/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
64 words
A sulfur dioxide-ethylene-vinyl ester terpolymer having improved thermal stability observed as a reduction in the level of malador of the terpolymer and/or an improvement in the color stability of the terpolymer, said terpolymer containing substantially uniformly distributed therein a thermal stability imparting amount of at least one inorganic oxygen-containing metal compound in which the metal is an alkali metal, alkaline earth metal or zinc.
Claim 2
Dependent Claim
64 words
A sulfur dioxide-ethylene-vinyl ester terpolymer having improved thermal stability observed as a reduction in the level of malador of the terpolymer and/or an improvement in the color stability of the terpolymer, said terpolymer containing substantially uniformly distributed therein a thermal stability imparting amount of at least one inorganic oxygen-containing metal compound in which the metal is an alkali metal, alkaline earth metal or zinc.
Claim 3
Dependent Claim
18 words
The terpolymer of claim 1 containing from about 0.5 to about 10.0 weight percent inorganic oxygen-containing metal compound.
Claim 4
Dependent Claim
18 words
The terpolymer of claim 2 containing from about 1 to about 5 weight percent inorganic oxygen-containing metal compound.
Claim 5
Dependent Claim
21 words
The terpolymer of claim 1 in which the inorganic oxygen-containing metal compound is an oxide, carbonate, sulfate, phosphate, borate or silicate.
Claim 6
Dependent Claim
55 words
The terpolymer of claim 4 in which the inorganic oxygen-containing metal compound is at least one member of the group consisting of zinc oxide, magnesium oxide, sodium sulfate, calcium hydroxide, sodium carbonate, zinc carbonate, calcium carbonate, magnesium hydroxide, lithium carbonate, barium hydroxide, barium oxide, barium carbonate, potassium borate, magnesium borate, potassium silicate and potassium carbonate.
Claim 7
Dependent Claim
10 words
The terpolymer of claim 1 additionally containing an organic antioxidant.
Claim 8
Dependent Claim
16 words
The terpolymer of claim 6 containing from about 0.05 to about 1.0 weight percent organic antioxidant.
Claim 9
Dependent Claim
16 words
The terpolymer of claim 7 containing from about 0.1 to about 0.5 weight percent organic antioxidant.
Claim 10
Dependent Claim
15 words
The terpolymer of claim 6 in which the organic antioxidant is [dialkyl phenol sulfide 4,4'thio-bis(6-t-butyl-5m-cresol)].
Claim 11
Dependent Claim
16 words
The terpolymer of claim 1 containing magnesium oxide in combination with [dialkyl phenol sulfide 4,4'thio-bis (6-t-butyl-m-cresol)].
Claim 12
Dependent Claim
68 words
A process for imparting improved thermal stability to a sulfur dioxide-ethylene-vinyl acetate terpolymer observed as a reduction in the level of malodor of the terpolymer and/or an improvement in the color stability of the terpolymer which comprises incorporating substantially uniformly in said terpolymer a thermal stability-imparting amount of at least one inorganic oxygen-containing metal compound in which the metal is an alkali metal, alkaline earth metal or zinc.
Claim 13
Dependent Claim
68 words
A process for imparting improved thermal stability to a sulfur dioxide-ethylene-vinyl acetate terpolymer observed as a reduction in the level of malodor of the terpolymer and/or an improvement in the color stability of the terpolymer which comprises incorporating substantially uniformly in said terpolymer a thermal stability-imparting amount of at least one inorganic oxygen-containing metal compound in which the metal is an alkali metal, alkaline earth metal or zinc.
Claim 14
Dependent Claim
21 words
The process of claim 11 in which is added from about 0.5 to about 10.0 weight percent inorganic oxygen-containing metal compound.
Claim 15
Dependent Claim
21 words
The process of claim 12 in which is added from about 1 to about 5 weight percent inorganic oxygen-containing metal compound.
Claim 16
Dependent Claim
21 words
The process of claim 11 in which the inorganic oxygen-containing metal compound is an oxide, carbonate, sulfate, phosphate, borate or silicate.
Claim 17
Dependent Claim
55 words
The process of claim 14 in which the inorganic oxygen-containing metal compound is at least one member of the group consisting of zinc oxide, magnesium oxide, sodium sulfate, calcium hydroxide, sodium carbonate, zinc carbonate, calcium carbonate, magnesium hydroxide, lithium carbonate, barium hydroxide, barium oxide, barium carbonate, potassium borate, magnesium borate, potassium silicate and potassium carbonate.
Claim 18
Dependent Claim
13 words
The process of claim 11 in which is additionally added an organic antioxidant.
Claim 19
Dependent Claim
19 words
The process of claim 16 in which is added from about 0.05 to about 1.0 weight percent organic antioxidant.
Claim 20
Dependent Claim
19 words
The process of claim 17 in which is added from about 0.1 to about 0.5 weight percent organic antioxidant.
Claim 21
Dependent Claim
15 words
The process of claim 16 in which the organic antioxidant is [dialkyl phenol sulfide 4,4'thio-bis(6-t-butyl-m-cresol)].
Claim 22
Dependent Claim
18 words
The process of claim 11 in which is added magnesium oxide in combination with [dialkyl phenol sulfide 4,4'thio-bis(6-t-butyl-m-cresol)].
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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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |