Patent US4111901A successfully refreshed from Google Patents.
US4111901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered five-membered nitrogen rings as polyolefin stabilizers
Assignee: GE Chemicals Inc
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Filing: 1977-06-06
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Granted: 1978-09-05
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Expires: 1997-06-06
Abstract
Abstract Olefin polymers stabilized against deterioration caused by exposure to ultraviolet radiation. The stabilization is effected by means of an additive which is a hindered five-membered nitrogen ring. The five-membered ring is a substituted pyrrolidine or pyrroline having ester or amide groups. The compounds are characterized by excellent hydrolytic stability.
Inventors
- 👤 Ingenuin Hechenbleikner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:13
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/74; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/12; C07D207/18; C07D207/22; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A polymer composition stabilized against deterioration due to ultraviolet light and heat comprising a polyolefin and a minor proportion, sufficient to provide such stabilization, of a five-membered nitrogen ring compound having the structure AOCOR, ACOOR or ACONHR' where A is a 2,2,5,5-tetraalkyl pyrrolidine or pyrroline wherein the alkyl groups are lower alkyl, R is alkyl, alkOCOA or alkCOOA where alk is an alkylene residue of a dicarboxylic or dihydroxy compound, and R' is alkyl or alkNHCOA; or a salt thereof.
Claim 2
Dependent Claim
80 words
A polymer composition stabilized against deterioration due to ultraviolet light and heat comprising a polyolefin and a minor proportion, sufficient to provide such stabilization, of a five-membered nitrogen ring compound having the structure AOCOR, ACOOR or ACONHR' where A is a 2,2,5,5-tetraalkyl pyrrolidine or pyrroline wherein the alkyl groups are lower alkyl, R is alkyl, alkOCOA or alkCOOA where alk is an alkylene residue of a dicarboxylic or dihydroxy compound, and R' is alkyl or alkNHCOA; or a salt thereof.
Claim 3
Dependent Claim
11 words
The polymer composition of claim 1 wherein the polyolefin is polypropylene.
Claim 4
Dependent Claim
12 words
The polymer composition of claim 1 wherein A is a 2,2,5,5-tetramethyl pyrrolidine.
Claim 5
Dependent Claim
12 words
The polymer composition of claim 1 wherein A is a 2,2,5,5-tetramethyl pyrroline.
Claim 6
Dependent Claim
14 words
The polymer composition of claim 1 wherein the five-membered nitrogen ring compound is AOCOalkCOOA.
Claim 7
Dependent Claim
14 words
The polymer composition of claim 1 wherein the five-membered nitrogen ring compound is ACONHR'.
Claim 8
Dependent Claim
11 words
The polymer composition of claim 5 wherein A is 2,2,5,5-tetraalkyl pyrrolidine.
Claim 9
Dependent Claim
12 words
The polymer composition of claim 5 wherein A is a 2,2,5,5-tetraalkyl pyrroline.
Claim 10
Dependent Claim
10 words
The polymer composition of claim 6 wherein R' is alkyl.
Claim 11
Dependent Claim
21 words
The polymer composition of claim 1 characterized further in that it also contains a polyvalent metal salt of a fatty acid.
Claim 12
Dependent Claim
16 words
The polymer composition of claim 1 characterized further in that it also contains a phenolic antioxidant.
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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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |