US4370437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrite-sorbate stabilizing system
Assignee: Phillips Petroleum Co
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Filing: 1982-02-05
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Granted: 1983-01-25
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Expires: 2002-02-05
Abstract
Abstract The addition of a nitrite-sorbate stabilizing system to a copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon improves thermal stability and suppresses gel and fisheye formation.
Inventors
- 👤 Kenneth W. Willcox
- 👤 James C. Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:11
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K3/00; C08K3/28
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
96 words
A composition comprising: (a) a linear or radial block copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon; (b) a metal nitrite; and (c) a metal sorbate; wherein said metal nitrite and said metal sorbate are independently derived from the metals of Groups IA and IIA of the Periodic Table of Elements; wherein said metal nitrite and said metal sorbate are at least partly soluble in water; and wherein said metal nitrite and said metal sorbate are added in amounts sufficient to at least partially suppress get or fisheye formation or to improve thermal stability.
Claim 2
Dependent Claim
96 words
A composition comprising: (a) a linear or radial block copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon; (b) a metal nitrite; and (c) a metal sorbate; wherein said metal nitrite and said metal sorbate are independently derived from the metals of Groups IA and IIA of the Periodic Table of Elements; wherein said metal nitrite and said metal sorbate are at least partly soluble in water; and wherein said metal nitrite and said metal sorbate are added in amounts sufficient to at least partially suppress get or fisheye formation or to improve thermal stability.
Claim 3
Dependent Claim
14 words
A composition in accordance with claim 1 wherein said metal nitrite is calcium nitrite.
Claim 4
Dependent Claim
14 words
A composition in accordance with claim 1 wherein said metal nitrite is potassium nitrite.
Claim 5
Dependent Claim
17 words
A composition in accordance with claim 1, 2 or 3 wherein said metal sorbate is potassium sorbate.
Claim 6
Dependent Claim
52 words
A composition in accordance with claim 1, 2 or 3 wherein said copolymer is a normally solid resinous linear or radial block copolymer of a conjugated diene containing from about 4 to about 12 carbon atoms and a monovinyl-substituted aromatic hydrocarbon containing from about 8 to about 18 carbon atoms per molecule.
Claim 7
Dependent Claim
14 words
A composition in accordance with claim 5 wherein said metal sorbate is potassium sorbate.
Claim 8
Dependent Claim
17 words
A composition in accordance with claim 5 wherein said copolymer is a copolymer of 1,3-butadiene and styrene.
Claim 9
Dependent Claim
17 words
A composition in accordance with claim 6 wherein said copolymer is a copolymer of 1,3-butadiene and styrene.
Claim 10
Dependent Claim
35 words
A composition in accordance with claim 1, 2 or 3 wherein the amount of said metal nitrite and said metal sorbate is from about 1 to about 40 ppm each based upon the copolymer composition.
Claim 11
Dependent Claim
32 words
A composition in accordance with claim 4 wherein the amount of said metal nitrite and said metal sorbate is from about 1 to about 40 ppm each based upon the copolymer composition.
Claim 12
Dependent Claim
57 words
A composition in accordance with claim 7 wherein said copolymer comprises from about 5 to 30 weight percent polymerized 1,3-butadiene and from about 95 to 70 weight percent polymerized styrene; and wherein said copolymer has a melt flow in the range of about 0.5 to about 20 g/10 min. as determined by ASTM D 1238-65T, condition G.
Claim 13
Independent Claim
94 words
A method which comprises admixing with a resinous block copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon a metal nitrite and a metal sorbate; wherein said metal nitrite and said metal sorbate are independently derived from the metals of Groups IA and IIA of the Periodic Table of Elements; wherein said metal nitrite and said metal sorbate are at least partly soluble in water; and wherein said metal nitrite and said metal sorbate are added in amounts sufficient to at least partially suppress gel or fisheye formation or to improve thermal stability.
Claim 14
Independent Claim
94 words
A method which comprises admixing with a resinous block copolymer of a conjugated diene and a monovinyl-substituted aromatic hydrocarbon a metal nitrite and a metal sorbate; wherein said metal nitrite and said metal sorbate are independently derived from the metals of Groups IA and IIA of the Periodic Table of Elements; wherein said metal nitrite and said metal sorbate are at least partly soluble in water; and wherein said metal nitrite and said metal sorbate are added in amounts sufficient to at least partially suppress gel or fisheye formation or to improve thermal stability.
Claim 15
Dependent Claim
14 words
A method in accordance with claim 12 wherein said metal nitrite is calcium nitrite.
Claim 16
Dependent Claim
14 words
A method in accordance with claim 12 wherein said metal nitrite is potassium nitrite.
Claim 17
Dependent Claim
17 words
A method in accordance with claim 12, 13 or 14 wherein said metal sorbate is potassium sorbate.
Claim 18
Dependent Claim
52 words
A method in accordance with claim 12, 13 or 14 wherein said copolymer is a normally solid resinous linear or radial block copolymer of a conjugated diene containing from about 4 to about 12 carbon atoms and a monovinyl-substituted aromatic hydrocarbon containing from about 8 to about 18 carbon atoms per molecule.
Claim 19
Dependent Claim
14 words
A method in accordance with claim 16 wherein said metal sorbate is potassium sorbate.
Claim 20
Dependent Claim
17 words
A method in accordance with claim 16 wherein said copolymer is a copolymer of 1,3-butadiene and styrene.
Claim 21
Dependent Claim
17 words
A method in accordance with claim 17 wherein said copolymer is a copolymer of 1,3-butadiene and styrene.
Claim 22
Dependent Claim
35 words
A method in accordance with claim 12, 13 or 14 wherein the amount of said metal nitrite and said metal sorbate is from about 1 to about 40 ppm each based upon the copolymer composition.
Claim 23
Dependent Claim
32 words
A method in accordance with claim 15 wherein the amount of said metal nitrite and said metal sorbate is from about 1 to about 40 ppm each based upon the copolymer composition.
Claim 24
Dependent Claim
57 words
A method in accordance with claim 18 wherein said copolymer comprises from about 5 to 30 weight percent polymerized 1,3-butadiene and from about 95 to 70 weight percent polymerized styrene; and wherein said copolymer has a melt flow in the range of about 0.5 to about 20 g/10 min as determined by ASTM D 1238-65T, condition G.
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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |