Patent US4981914A successfully refreshed from Google Patents.
US4981914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer bound UV stabilizers
Assignee: Arkema Inc
•
Filing: 1989-06-23
•
Granted: 1991-01-01
•
Expires: 2009-06-23
Abstract
Abstract Ultraviolet light stabilizers are chemically bound to anhydride containing polymers or copolymers. Polymeric stabilizers are prepared by the reaction of primary amino or hydrazido-substituted UV absorbers with some or all of the anhydride groups of the polymer or copolymer to form pendant stabilizer substituted imide or amic acid groups. The polymer bound stabilizers are not lost from the polymer system by volatilization, migration, or extraction, even at high temperature. The polymeric stabilizers of this invention may be used as they are or as concentrates to stabilize other polymer systems.
Inventors
- 👤 Ronald E. MacLeay
- 👤 Terry N. Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:11
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A polymer with recurring units having a formula ##STR11## or both, in which the units occur either in the polymer backbone, on grafted side chains, as pendant units, or as combinations thereof, and wherein x is 0 or 1, R 1 and R 2 are independently hydrogen, alkyl of 1 to 6 carbons, cycloalkyl of 5 to 7 carbons, phenyl, chlorine or bromine, and each ##STR12## represents the residue of a (a) primary amino substituted 2-hydroxybenzophenone, (b) primary amino substituted salicylate ester or (c) primary amino substituted oxalic acid amide.
Claim 2
Dependent Claim
90 words
A polymer with recurring units having a formula ##STR11## or both, in which the units occur either in the polymer backbone, on grafted side chains, as pendant units, or as combinations thereof, and wherein x is 0 or 1, R 1 and R 2 are independently hydrogen, alkyl of 1 to 6 carbons, cycloalkyl of 5 to 7 carbons, phenyl, chlorine or bromine, and each ##STR12## represents the residue of a (a) primary amino substituted 2-hydroxybenzophenone, (b) primary amino substituted salicylate ester or (c) primary amino substituted oxalic acid amide.
Claim 3
Dependent Claim
89 words
The composition of claim 1 in which (a) is ##STR13## wherein R 3 and R 4 are independently hydrogen, hydroxyl, alkyl of 1-8 carbons, alkoxyl of 1-4 carbons or a connecting group X 1 , with the proviso that only one of either R 3 or R 4 can be connecting group X 1 , and X 1 is a direct bond or a divalent radical --CH 2 --CH 2 --O--, --R 5 --NH--C(═O)-- or --R 5 --NH--S(═O) 2 -- in which R 5 is alkylene of 2-12 carbons.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein R 3 is hydrogen or alkoxy of 1-4 carbons and R 4 is X 1 .
Claim 5
Dependent Claim
28 words
The composition of claim 1 in which (b) is ##STR14## wherein R 8 is substituted or unsubstituted aryl of 6-10 carbons and X 4 is a direct bond.
Claim 6
Dependent Claim
10 words
The composition of claim 4 wherein R 8 is phenyl.
Claim 7
Dependent Claim
99 words
The composition of claim 1 in which (c) is ##STR15## wherein R 9 is hydrogen, hydroxyl, alkoxy of 1-12 carbons, alkylthio of 1-12 carbons, acyloxy of 2-12 carbons, acylthio of 2-12 carbons, alkyl of 1-8 carbons, aryl of 6-12 carbons, chlorine or bromine, R 10 , R 11 , R 12 , and R 13 are independently hydrogen, alkyl of 1-8 carbons, aryl of 6-12 carbons, aralkyl of 7-13 carbons, alkoxy of 1-12 carbons or alkylthio of 1-12 carbons and X 5 is alkylene of 2 to 12 carbons, aralkylene of 7-13 carbons, alkenylene of 3-12 carbons or phenylene.
Claim 8
Dependent Claim
24 words
The composition of claim 6 wherein R 9 is ethoxy, R 11 , R 12 , R 13 , and R 14 are hydrogen.
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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) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |