US4525514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizer for polymeric substance and polymeric substance composition containing the same
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1984-05-17
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Granted: 1985-06-25
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Expires: 2004-05-17
Abstract
Abstract A stabilizer for polymeric substances made up of a sulfur-containing compound of the formula: <IMAGE> (I) wherein R1 represents an alkyl group having 4 to 20 carbon atoms and a phenolic compound of the general formula: <IMAGE> (II) wherein R2 represents an alkyl group having 1 to 4 carbon atoms, in the ratio (I):(II) of 1:0.1-2 by weight. The combination of the above stabilizer with a polymeric substance, such as synthetic rubber is also contemplated herein.
Inventors
- 👤 Shinichi Yachigo
- 👤 Tamaki Ishii
- 👤 Yukoh Takahashi
- 👤 Yutaka Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/04; C08K5/13; C08K5/134
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A stabilizer for a polymeric substance selected from the group consisting of polybutadiene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene-styrene terpolymer resins and high impact polystyrene resins consisting essentially of a sulfur-containing compound of the general formula: ##STR8## wherein R 1 represents an alkyl group having 4 to 20 carbon atoms and a phenolic compound of the general formula: ##STR9## wherein R 2 represents an alkyl group having 1 to 4 carbon atoms, in the ratio (I):(II) of 1:0.1-2 by weight.
Claim 2
Dependent Claim
79 words
A stabilizer for a polymeric substance selected from the group consisting of polybutadiene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene-styrene terpolymer resins and high impact polystyrene resins consisting essentially of a sulfur-containing compound of the general formula: ##STR8## wherein R 1 represents an alkyl group having 4 to 20 carbon atoms and a phenolic compound of the general formula: ##STR9## wherein R 2 represents an alkyl group having 1 to 4 carbon atoms, in the ratio (I):(II) of 1:0.1-2 by weight.
Claim 3
Dependent Claim
14 words
The stabilizer as claimed in claim 1 wherein the sulfur-containing compound is pentaerythritol-tetrakis(β-dodecyl thiopropionate).
Claim 4
Dependent Claim
14 words
The stabilizer as claimed in claim 1 wherein the phenolic compound is 2-(2-hydroxy-3-t-butyl-5-methylbenzyl)-4-methyl-6-t-butylphenyl acrylate.
Claim 5
Dependent Claim
77 words
A polymeric substance selected from the group consisting of polybutadiene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene-styrene terpolymer resins and high impact polystyrene resins, said composition stabilized with a sulfur-containing compound of the general formula: ##STR10## wherein R 1 represents an alkyl group having 4 to 20 carbon atoms and a phenolic compound of the general formula: ##STR11## wherein R 2 represents an alkyl group having 1 to 4 carbon atoms, in the ratio (I):(II) of 1:0.1-2 by weight.
Claim 6
Dependent Claim
77 words
A polymeric substance selected from the group consisting of polybutadiene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene-styrene terpolymer resins and high impact polystyrene resins, said composition stabilized with a sulfur-containing compound of the general formula: ##STR10## wherein R 1 represents an alkyl group having 4 to 20 carbon atoms and a phenolic compound of the general formula: ##STR11## wherein R 2 represents an alkyl group having 1 to 4 carbon atoms, in the ratio (I):(II) of 1:0.1-2 by weight.
Claim 7
Dependent Claim
14 words
The stabilizer as claimed in claim 4 wherein the sulfur-containing compound is pentaerythritol-tetrakis(β-dodecyl thiopropionate).
Claim 8
Dependent Claim
14 words
The stabilizer as claimed in claim 5 wherein the phenolic compound is 2-(2-hydroxy-3-t-butyl-5-methylbenzyl-4-methyl-6-t-butylphenyl acrylate.
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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |