US4049751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extraction resistant polyolefin stabilizers
Assignee: Dart Industries Inc
•
Filing: 1976-04-26
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Granted: 1977-09-20
•
Expires: 1996-04-26
Abstract
Abstract A hindered phenolic antioxidant stablizer for polyolefins is rendered extraction resistant by complexing it with an agent containing complexing groups derived from N-vinyl-2-pyrrolidone or a N-dialkyl substituted amino alkyl ester of an alpha , beta -unsaturated carboxylic acid.
Inventors
- 👤 Frank Scardiglia
- 👤 Kornel Dezso Kiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/10; C08K5/16; C08K5/22; C08K5/24; C08K5/25; C08L; C08L23/00; C08L23/02; C08L23/10; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
28 words
A composition of matter which comprises a complex of a hindered phenolic antioxidant and a high molecular weight polymeric nitrogenous complexing agent having complexing group derived from N-vinyl-2-pyrrolidone.
Claim 2
Dependent Claim
28 words
A composition of matter which comprises a complex of a hindered phenolic antioxidant and a high molecular weight polymeric nitrogenous complexing agent having complexing group derived from N-vinyl-2-pyrrolidone.
Claim 3
Dependent Claim
28 words
The composition of claim 1 wherein the complexing agent is a copolymer of at least one α-olefin having from 2 to 8 carbon atoms per molecule and N-Vinyl-2-pyrrolidone.
Claim 4
Dependent Claim
30 words
The composition of claim 2, wherein the complexing agent is a graft copolymer having a backbone derived from at least one of said α-olefins and side chains derived from N-vinyl-2-pyrrolidone.
Claim 5
Dependent Claim
14 words
The composition of claim 2 wherein at least one of said α-olefins is propylene.
Claim 6
Dependent Claim
18 words
The composition of claim 4 wherein the complexing agent is a polypropylene grafted with N-vinyl-2 pyrrolidone side chains.
Claim 7
Dependent Claim
58 words
The composition of claim 1 wherein the phenolic antioxidant is a mono or polyester of alkane polyols, at least one of such ester groups comprising the acyl moiety ##STR3## in which R 1 and R 2 independently are a lower alkyl group containing 1 to 5 carbon atoms and x has a value of from 1 to 6.
Claim 8
Dependent Claim
18 words
The composition of claim 6 wherein the phenolic antioxidant is pentaerythritol tetraester of 3(3,5-di-t-butyl, 4-hydroxy phenyl) propionic acid.
Claim 9
Dependent Claim
11 words
The composition of claim 1 also containing a polyolefin base resin.
Claim 10
Dependent Claim
27 words
The composition of claim 8 wherein the polyolefin base resin is selected from homopolymers and copolymers of α-olefins having 2 to 8 carbon atoms, and mixtures thereof.
Claim 11
Dependent Claim
14 words
The composition of claim 9 wherein the polyolefin base resin is a propylene polymer.
Claim 12
Dependent Claim
20 words
The composition of claim 2 containing from about 0.01 to about 5 percent by weight of the hindered phenolic antioxidant.
Claim 13
Dependent Claim
18 words
The composition of claim 2 containing from about 0.3 to about 10 percent by weight of complexing groups.
Claim 14
Dependent Claim
19 words
The composition of claim 2 containing from 0.01 to about 5 percent by weight of a metal chelating agent.
Claim 15
Dependent Claim
18 words
The composition of claim 2 containing from about 1.5 to about 5 percent by weight of complexing groups.
References Cited (Backward Citations)
US3779945A
Cited
US3497573A
Cited
US3953402A
Cited
US3849516A
Cited
US3792014A
Cited
US3957920A
Cited
US3951911A
Cited
US3970637A
Cited
US3987086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |