US4520171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric hindered amines
Assignee: FiberVisions Inc
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Filing: 1982-05-05
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Granted: 1985-05-28
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Expires: 2002-05-05
Abstract
Abstract Disclosed is a new class of polymeric hindered amine light stabilizers based on maleic anhydride modified polyolefins reacted with tetramethyl piperidine derivatives. These materials are more effective than most of the generally used hindered amine light stabilizers, but due to their higher molecular weights and the polyolefin backbone, they are more compatible with polyolefins.
Inventors
- 👤 Diveley William R.
- 👤 Anthony B. Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:23
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08F; C08F8/00; C08F8/30; C08F8/32; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/16; C08K5/17; C08K5/20; C08L23/10; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A hindered amine substituted, maleic anhydride modified olefin polymer having a general formula selected from the class consisting of ##STR6## wherein R is an alpha-olefin polymer or copolymer residue and x and y are integers of a size relative to the molecular weight of R such that the total substitution of tetramethyl piperidine residue is between about 0.2 and 10% by weight, based on the total weight of the modified olefin polymer, and R' is H, OH, O', or O--R", where R" is a lower alkyl or substituted lower alkyl group having at least one hydrogen atom on the carbon attached to the nitrogen atom.
Claim 2
Dependent Claim
105 words
A hindered amine substituted, maleic anhydride modified olefin polymer having a general formula selected from the class consisting of ##STR6## wherein R is an alpha-olefin polymer or copolymer residue and x and y are integers of a size relative to the molecular weight of R such that the total substitution of tetramethyl piperidine residue is between about 0.2 and 10% by weight, based on the total weight of the modified olefin polymer, and R' is H, OH, O', or O--R", where R" is a lower alkyl or substituted lower alkyl group having at least one hydrogen atom on the carbon attached to the nitrogen atom.
Claim 3
Dependent Claim
15 words
The product of claim 1 wherein R is a polypropylene residue and R' is H.
Claim 4
Dependent Claim
2 words
2-[N-(2,2,6,6-tetramethyl-4-piperidinyl)succinimidyl] polypropylene.
Claim 5
Dependent Claim
2 words
2-[N-(2,2,6,6-tetramethyl-4-piperidinyl)succinimidyl] polypropylene.
Claim 6
Dependent Claim
2 words
2-[Di-(2,2,6,6-tetramethyl-4-piperidinyl)succinate] polypropylene.
Claim 7
Dependent Claim
2 words
2-[Di-(2,2,6,6-tetramethyl-4-piperidinyl)succinate] polypropylene.
Claim 8
Dependent Claim
44 words
A composition comprising a mixture of an olefin polymer and a modified olefin polymer of claim 1, said modified olefin polymer being present in an amount sufficient that the concentration of tetramethyl piperidine residues in said mixture is between 0.2 and 1.0% by weight.
Claim 9
Dependent Claim
14 words
The composition of claim 5 wherein the olefin polymer is polypropylene in both instances.
Claim 10
Dependent Claim
21 words
The composition of claim 1 wherein the total concentration of tetramethyl piperidine residue is between about 0.2 and 6.0% by weight.
Claim 11
Dependent Claim
21 words
The composition of claim 5 wherein the total concentration of tetramethyl piperidine residue is between about 0.2 and 6.0% by weight.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |