Patent US4692486A successfully refreshed from Google Patents.
US4692486A
Expired / Lapsed
US
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Synergistic mixture of low-molecular and high-molecular polyalkylpiperidines
Assignee: BASF Corp
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Filing: 1986-07-21
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Granted: 1987-09-08
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Expires: 2006-07-21
Abstract
Abstract Low-molecular and high-molecular polyalkylpiperidines are suitable as a synergistic mixture for stabilizing organic material, in particular organic polymers. The compounds are substances known per se. Thus, for example, the mixture of ##STR1## is distinguished by a pronounced synergism.
Inventors
- 👤 Francois Gugumus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C09; C09K; C09K15/00; C09K15/04; C09K15/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A stabiliser system consisting essentially of (A) a low-molecular, sterically hindered polyalkylpiperidine selected from the compounds of the formulae ##STR6## in which R 1 is a group of the formula ##STR7## and R 2 is a group of the formula ##STR8## and (B) a high-molecular, sterically hindered polyalkylpiperidine selected from the compounds of formulae ##STR9## wherein R 1 is as defined above, said components being present in a weight ratio of 5:1 to 1:5.
Claim 2
Dependent Claim
74 words
A stabiliser system consisting essentially of (A) a low-molecular, sterically hindered polyalkylpiperidine selected from the compounds of the formulae ##STR6## in which R 1 is a group of the formula ##STR7## and R 2 is a group of the formula ##STR8## and (B) a high-molecular, sterically hindered polyalkylpiperidine selected from the compounds of formulae ##STR9## wherein R 1 is as defined above, said components being present in a weight ratio of 5:1 to 1:5.
Claim 3
Dependent Claim
21 words
A stabiliser system according to claim 1, containing the compound (A-1) as component (A) and the compound (B-5) as component (B).
Claim 4
Dependent Claim
21 words
A stabiliser system according to claim 1, containing the compound (A-11) as component (A) and the compound (B-5) as component (B).
Claim 5
Dependent Claim
21 words
A stabiliser system according to claim 1, containing the compound (A-1) as component (A) and the compound (B-4) as component (B).
Claim 6
Dependent Claim
21 words
A stabiliser system according to claim 1, containing the compound (A-9) as component (A) and the compound (B-4) as component (B).
Claim 7
Dependent Claim
22 words
Organic polymeric material containing 0.01 to 5% by weight, based on the organic material, of the stabiliser system according to claim 1.
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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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |