US4187212A
Expired / Lapsed
US
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Stabilization systems from triarylphosphites and phenols
Assignee: BASF Corp
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Filing: 1977-06-02
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Granted: 1980-02-05
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Expires: 1997-06-02
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
2026-10-29 07:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/134; C08K5/1345; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
90 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 represents tert-butyl, or 1,1-dimethylpropyl, R 2 represents methyl, tert-butyl, or 1,1-dimethylpropyl, and (2) a hindered phenolic antioxidant selected from the group consisting of 1,3,5-tris-(3',5'-di-t.butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris-(3,5-di-t.butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, ethyleneglycol-bis(3,3-bis-3'-t.butyl-4'-hydroxyphenyl)-butyrate, pentaerylthrit-tetra-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], thiobisethyleneglycol-bis-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], hexamethylene-1,6-di-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate] and β-(3,5-di-t.butyl-4-hydroxyphenyl)-propionic acid-n-octadecyl ester, the ratio of the phosphite to the antioxidant being from 10:1 to 1:5.
Claim 2
Dependent Claim
90 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 represents tert-butyl, or 1,1-dimethylpropyl, R 2 represents methyl, tert-butyl, or 1,1-dimethylpropyl, and (2) a hindered phenolic antioxidant selected from the group consisting of 1,3,5-tris-(3',5'-di-t.butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris-(3,5-di-t.butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, ethyleneglycol-bis(3,3-bis-3'-t.butyl-4'-hydroxyphenyl)-butyrate, pentaerylthrit-tetra-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], thiobisethyleneglycol-bis-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], hexamethylene-1,6-di-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate] and β-(3,5-di-t.butyl-4-hydroxyphenyl)-propionic acid-n-octadecyl ester, the ratio of the phosphite to the antioxidant being from 10:1 to 1:5.
Claim 3
Dependent Claim
16 words
A stabilized composition of claim 1 wherein the hindered phenolic antioxidant is pentaerithritol tetrakis 3-(3,5-di-tert.-butyl-4-hydroxyphenyl) propionate.
Claim 4
Dependent Claim
10 words
A composition of claim 2 wherein the triarylphosphite is tris-(2,4-di-tert-butylphenyl)phosphite.
Claim 5
Dependent Claim
10 words
A composition of claim 2 wherein the triarylphosphite is tris-(2-tert-butyl-4-methylphenyl)-phosphite.
Claim 6
Dependent Claim
12 words
A composition of claim 2 wherein the polymer is polyethylene or polypropylene.
Claim 7
Dependent Claim
12 words
A composition of claim 4 wherein the polymer is polyethylene or polypropylene.
Claim 8
Dependent Claim
10 words
A composition claim of 1, wherein the triarylphosphite is tris-(2,4-di-tert-butylphenyl)phosphite.
Claim 9
Dependent Claim
10 words
A composition of claim 1, wherein the triarylphosphite is tris-(2-tert-butyl-4-methyl)-phosphite.
Claim 10
Dependent Claim
12 words
A composition of claim 1, wherein the polymer is polyethylene or polypropylene.
Claim 11
Dependent Claim
12 words
A composition of claim 8, wherein the polymer is polyethylene or polypropylene.
Claim 12
Independent Claim
87 words
A method of stabilizing polymers derived from singly unsaturated, acyclic hydrocarbons or mixtures or copolymers thereof during processing which comprises incorporating in said polymer 0.005 to 5% of a mixture consisting essentially of (a) a triarylphosphite of the general formula ##STR5## wherein R 1 represents tert-butyl, or 1,1-dimethylpropyl; R 2 represents methyl, tert-butyl, or 1,1-dimethylpropyl, and (b) hindered phenolic antioxidant selected from the group consisting of 1,3,5-tris-(3',5'-di-t.butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris-(3,5-di-t.butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, ethyleneglycol-bis(3,3-bis-3'-t.butyl-4'-hydroxyphenyl)-butyrate, pentaerylthrit-tetra-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], thiobisethyleneglycol-bis-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], hexamethylene-1,6-di-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate] and β-(3,5-di-t.butyl-4-hydroxyphenyl)-propionic acid-n-octadecyl ester, wherein the phosphite to the antioxidant ratio is 10:1 to 1:5.
Claim 13
Independent Claim
87 words
A method of stabilizing polymers derived from singly unsaturated, acyclic hydrocarbons or mixtures or copolymers thereof during processing which comprises incorporating in said polymer 0.005 to 5% of a mixture consisting essentially of (a) a triarylphosphite of the general formula ##STR5## wherein R 1 represents tert-butyl, or 1,1-dimethylpropyl; R 2 represents methyl, tert-butyl, or 1,1-dimethylpropyl, and (b) hindered phenolic antioxidant selected from the group consisting of 1,3,5-tris-(3',5'-di-t.butyl-4-hydroxybenzyl)-isocyanurate, 1,3,5-tris-(3,5-di-t.butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, ethyleneglycol-bis(3,3-bis-3'-t.butyl-4'-hydroxyphenyl)-butyrate, pentaerylthrit-tetra-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], thiobisethyleneglycol-bis-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate], hexamethylene-1,6-di-[3-(3,5-di-t.butyl-4-hydroxyphenyl)-propionate] and β-(3,5-di-t.butyl-4-hydroxyphenyl)-propionic acid-n-octadecyl ester, wherein the phosphite to the antioxidant ratio is 10:1 to 1:5.
Claim 14
Dependent Claim
15 words
A method of claim 11 wherein the hindered phenolic antioxidant is pentaerithritol tetrakis 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate.
Claim 15
Dependent Claim
13 words
A method of stabilizing according to claim 12, wherein the triarylphosphite is tris-(2,4-di-tert.-butylphenyl)-phosphite.
Claim 16
Dependent Claim
13 words
A method of stabilizing according to claim 12, wherein the triaryphosphite is tris-(2-tert.-butyl-4-methylphenyl)-phosphite.
Claim 17
Dependent Claim
13 words
A method according to claim 12, wherein the polymer is propylene or polyethylene.
Claim 18
Dependent Claim
15 words
A method according to claim 13, characterized in that the polymer is polyethylene or polypropylene.
Claim 19
Dependent Claim
13 words
A method of stabilizing according to claim 11, wherein the triarylphosphite is tris-(2,4-di-tert-butyl-phenyl)phosphite.
Claim 20
Dependent Claim
13 words
A method of stabilizing according to claim 11, wherein thr triarylphosphite is tris-(2-tert-butyl-4-methylphenyl)-phosphite.
Claim 21
Dependent Claim
13 words
A method according to claim 11, wherein the polymer is propylene or polyethylene.
Claim 22
Dependent Claim
15 words
A method according to claim 16, characterized in that the polymer is polyethylene or polypropylene.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |