Patent JPS5897340A successfully refreshed from Google Patents.
US4290941A
Expired / Lapsed
US
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Stabilization systems from triarylphosphites and phenols
Assignee: BASF Corp
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Filing: 1979-08-24
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Granted: 1981-09-22
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Expires: 1999-08-24
Abstract
Abstract Stabilization system consisting of a triarylphosphite of the general formula ##STR1## wherein R 1 represents tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl, and one of R 2 and R 3 is hydrogen and the other is hydrogen, methyl, tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl, and a phenolic antioxidant, for stabilizing polyolefins.
Inventors
- 👤 Horst Zinke
- 👤 Hans J. Lorenz
- 👤 Helmut Linhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:54
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/145; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
A stabilized composition consisting essentially of (a) a polymer that is derived from a singly unsaturated acyclic hydrocarbon, or mixtures or copolymers thereof; and (b) from 0.005 to 5% of a mixture of (1) a triarylphosphite of the general formula ##STR4## wherein R 1 is tert.butyl or 1,1-dimethylpropyl, and R 2 is methyl, tert.butyl or 1,1-dimethylpropyl, and (2) a hindered phenolic antioxidant selected from the group consisting of 2,6-di-tert.butyl-4-methylphenol, 2,2'-methylene-bis(6-tert.butyl-4-methylphenol), 2,2'-methylene-bis(6-tert.butyl-4-ethylphenol), 2,2'-methylene-bis(4-methyl-6-α-methylcyclohexyl) phenol, 1,1,3-tris(5-tert.butyl-4-hydroxy-2-methylphenyl) butane, 4,4'-thiobis(6-tert.butyl-3-methylphenol), 3,5-di-tert.butyl-4-hydroxybenzyl-phosphonic acid diethylester, N,N'-di-(3,5-di-tert.butyl-4-hydroxyphenylpropionyl)-hexamethylenediamine, 1,2-bis(3,5-di-tert.butyl-4-hydroxyphenyl-propionyloxy)-ethane, 1,5-bis(3,5-di-tert.butyl-4-hydroxyphenyl-propionyloxy)-2-thiapentane, 1,3-bis(3,5-di-tert.butyl-4-hydroxyphenyl-propionyloxy)-2,2-dimethylpropane and 1,1-bis(5-tert.butyl-4-hydroxy-2-methylphenyl)-butane; the ratio of the phosphite to the antioxidant being from 10:1 to 1:5.
Claim 2
Dependent Claim
98 words
A stabilized composition consisting essentially of (a) a polymer that is derived from a singly unsaturated acyclic hydrocarbon, or mixtures or copolymers thereof; and (b) from 0.005 to 5% of a mixture of (1) a triarylphosphite of the general formula ##STR4## wherein R 1 is tert.butyl or 1,1-dimethylpropyl, and R 2 is methyl, tert.butyl or 1,1-dimethylpropyl, and (2) a hindered phenolic antioxidant selected from the group consisting of 2,6-di-tert.butyl-4-methylphenol, 2,2'-methylene-bis(6-tert.butyl-4-methylphenol), 2,2'-methylene-bis(6-tert.butyl-4-ethylphenol), 2,2'-methylene-bis(4-methyl-6-α-methylcyclohexyl) phenol, 1,1,3-tris(5-tert.butyl-4-hydroxy-2-methylphenyl) butane, 4,4'-thiobis(6-tert.butyl-3-methylphenol), 3,5-di-tert.butyl-4-hydroxybenzyl-phosphonic acid diethylester, N,N'-di-(3,5-di-tert.butyl-4-hydroxyphenylpropionyl)-hexamethylenediamine, 1,2-bis(3,5-di-tert.butyl-4-hydroxyphenyl-propionyloxy)-ethane, 1,5-bis(3,5-di-tert.butyl-4-hydroxyphenyl-propionyloxy)-2-thiapentane, 1,3-bis(3,5-di-tert.butyl-4-hydroxyphenyl-propionyloxy)-2,2-dimethylpropane and 1,1-bis(5-tert.butyl-4-hydroxy-2-methylphenyl)-butane; the ratio of the phosphite to the antioxidant being from 10:1 to 1:5.
Claim 3
Dependent Claim
10 words
The composition of claim 1, wherein said phosphite is tris(2,4-di-tert.butylphenyl)-phosphite.
Claim 4
Dependent Claim
10 words
The composition of claim 1, wherein said phosphite is tris(2-tert.butyl-4-methylphenyl)-phosphite.
Claim 5
Dependent Claim
13 words
The composition of claims 1, 2 or 3, wherein said phenol is 2,6-di-tert.butyl-4-methylphenol.
Claim 6
Dependent Claim
12 words
The composition of claim 1, wherein said polymer is polyethylene or polypropylene.
Claim 7
Dependent Claim
12 words
The composition of claim 4, wherein said polymer is polyethylene or polypropylene.
Claim 8
Dependent Claim
33 words
A method of stabilizing polymers derived from singly unsaturated, acyclic hydrocarbons or mixtures or copolymers thereof, which comprises incorporating in said polymer from 0.005 to 5% of mixture (b) according to claim 1.
Claim 9
Dependent Claim
10 words
The method of claim 7, wherein said phosphite is tris-(2,4-di-tert.butylphenyl)-phosphite.
Claim 10
Dependent Claim
10 words
The method of claim 7, wherein said phosphite is tris(2-tert.butyl-4-methylphenyl)-phosphite.
Claim 11
Independent Claim
13 words
The method of claims 7, 8 or 9, wherein said phenol is 2,6-di-tert.butyl-4-methylphenol.
Claim 12
Dependent Claim
12 words
The method of claim 7, wherein said polymer is polyethylene or polypropylene.
Claim 13
Dependent Claim
12 words
The method of claim 10, wherein said polymer is polyethylene or polypropylene.
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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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |