Patent US4649221A successfully refreshed from Google Patents.
US4649221A
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US
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Polyhydroxylamines
Assignee: BASF Corp
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Filing: 1985-03-21
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Granted: 1987-03-10
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Expires: 2005-03-21
Abstract
Abstract Polyhydroxylamines are effective in stabilizing polyolefin compositions containing a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the hindered amine light stabilizers, the alkylated hydroxybenzoate light stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids and the thiosynergists, against degradation upon high temperature extrusion, exposure to the combustion products of natural gas, gamma irradiation or upon storage for extended periods.
Inventors
- 👤 Ramanathan Ravichandran
- 👤 Roger F. Malherbe
- 👤 Raymond Seltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:00
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C08K5/32; C08K5/3442; C08K5/3462
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
149 words
A compound of formula I ##STR7## wherein T 1 is hydrogen, alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 9 carbon atoms, or said aralkyl substituted by alkyl of 1 to 36 carbon atoms or by one or two halogen atoms, g is 2, 3 or 4, when g is 2, T 2 is alkylene of 2 to 12 carbon atoms, cycloalkylene of 6 to 10 carbon atoms, arylene of 6 to 10 carbon atoms, alkylenearylenealkylene of 8 to 10 carbon atoms, or ##STR8## when g is 3, T 2 is alkanetriyl of 3 to 6 carbon atoms, or ##STR9## or when g is 4, T 2 is alkanetetrayl of 4 to 6 carbon atoms, with the proviso that, when T 1 is hydrogen and g is 2, T 2 is not alkylene of 2 to 12 carbon atoms.
Claim 2
Dependent Claim
149 words
A compound of formula I ##STR7## wherein T 1 is hydrogen, alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 9 carbon atoms, or said aralkyl substituted by alkyl of 1 to 36 carbon atoms or by one or two halogen atoms, g is 2, 3 or 4, when g is 2, T 2 is alkylene of 2 to 12 carbon atoms, cycloalkylene of 6 to 10 carbon atoms, arylene of 6 to 10 carbon atoms, alkylenearylenealkylene of 8 to 10 carbon atoms, or ##STR8## when g is 3, T 2 is alkanetriyl of 3 to 6 carbon atoms, or ##STR9## or when g is 4, T 2 is alkanetetrayl of 4 to 6 carbon atoms, with the proviso that, when T 1 is hydrogen and g is 2, T 2 is not alkylene of 2 to 12 carbon atoms.
Claim 3
Dependent Claim
21 words
A compound according to claim 1 wherein T 1 is alkyl of 4 to 18 carbon atoms, cyclohexyl, cyclododecyl or benzyl.
Claim 4
Dependent Claim
23 words
A compound according to claim 1 wherein T 2 is alkylene of 2 to 8 carbon atoms, 1,4-cyclohexylene, m-phenylene, p-phenylene, p-xylylene or 2,3,5-6-tetramethyl-p-xylylene.
Claim 5
Dependent Claim
11 words
A compound according to claim 1 wherein T 2 is ##STR10##
Claim 6
Dependent Claim
9 words
The compound according to claim 1 which is N,N'-dihydroxy-N,N'-di-tert-butyl-p-xylylenediamine.
Claim 7
Dependent Claim
9 words
The compound according to claim 1 which is N,N'-dihydroxy-N,N'-dibenzyl-p-xylylenediamine.
Claim 8
Dependent Claim
9 words
The compound according to claim 1 which is N,N'-dihydroxy-N,N'-dioctyl-p-xylylenediamine.
Claim 9
Dependent Claim
9 words
The compound according to claim 1 which is N,N'-dihydroxy-N,N'-dioctadecyl-p-xylylenediamine.
Claim 10
Dependent Claim
9 words
The compound according to claim 1 which is N,N'-dihydroxy-N,N'-dibenzylhexamethylenediamine.
Claim 11
Dependent Claim
9 words
The compound according to claim 1 which is N,N'-dihydroxy-N,N'-dicyclohexyl-p-xylylenediamine.
Claim 12
Dependent Claim
9 words
The compound according to claim 1 which is 2,4,6-tris(N-benzylhydroxylaminomethyl)mesitylene.
Claim 13
Dependent Claim
9 words
The compound according to claim 1 which is 2,4,6-tris(N-methylhydroxylaminomethyl)mesitylene.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |