Patent US5016170A successfully refreshed from Google Patents.
Patent US4046736A successfully refreshed from Google Patents.
US4046736A
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1,3-BIS[(2,2,6,6-Tetraalkyl-4-piperidylidene)amino]guanidines as light stabilizers for polyolefins
Assignee: Wyeth Holdings LLC
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Filing: 1976-08-16
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Granted: 1977-09-06
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Expires: 1996-08-16
Abstract
Abstract Compounds of the formula: ##STR1## wherein X is --H, --OH, --O. alkyl of 1 to 8 carbon atoms, or acyl of 2 to 10 carbon atoms, and R is alkyl of 1 to 8 carbon atoms are useful for stabilizing polyolefins against degradation by ultraviolet light.
Inventors
- 👤 William Baptist Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:28
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/92; C07D211/94; C07D211/04; C07D211/68; C07D211/72; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
39 words
A compound of the formula: ##STR4## wherein X is --H, --OH, -- O., alkyl of 1 to 8 carbon atoms, or carboxylic acyl of 2 to 10 carbon atoms, and R is alkyl of 1 to 8 carbon atoms.
Claim 2
Dependent Claim
39 words
A compound of the formula: ##STR4## wherein X is --H, --OH, -- O., alkyl of 1 to 8 carbon atoms, or carboxylic acyl of 2 to 10 carbon atoms, and R is alkyl of 1 to 8 carbon atoms.
Claim 3
Dependent Claim
10 words
A compound according to claim 1 wherein R is methyl.
Claim 4
Dependent Claim
10 words
A compound according to claim 2 wherein X is --H.
Claim 5
Dependent Claim
12 words
A compound according to claim 2 wherein X is --CH 3 .
Claim 6
Dependent Claim
10 words
A compound according to claim 2 wherein X is --OH.
Claim 7
Dependent Claim
14 words
A compound according to claim 2 wherein X is --n--CH 8 H 17 .
Claim 8
Dependent Claim
10 words
A compound according to claim 2 wherein X is ##STR5##
Claim 9
Dependent Claim
10 words
A compound according to claim 2 wherein X is --0..
Claim 10
Dependent Claim
18 words
A polyolefin stabilized against degradation by ultraviolet light by an effective amount of a compound of claim 1.
Claim 11
Dependent Claim
21 words
The composition of claim 9 wherein said effective amount is about 0.1 to about 5% by weight on weight of polyolefin.
Claim 12
Dependent Claim
19 words
The composition of claim 10 wherein said effective amount is 0.2 to 2% by weight on weight of polyolefin.
Claim 13
Dependent Claim
10 words
The composition of claim 9 wherein said polyolefin is polypropylene.
Claim 14
Dependent Claim
10 words
The composition of claim 11 wherein said polyolefin is polypropylene.
References Cited (Backward Citations)
US3734883A
Cited
US3828052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |