US4356307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic imides, their preparation and use
Assignee: Huels AG
•
Filing: 1981-02-17
•
Granted: 1982-10-26
•
Expires: 2001-02-17
Abstract
Abstract Cyclic imides of the formula: ##STR1## in which R represents a saturated or unsaturated, optionally alkyl- or alkenyl-substituted alkylene or cycloalkylene radical having 2-120 C-atoms and R' represents hydrogen or a substituent selected from the group consisting of an alkyl radical having 1-20 C-atoms, an alkenyl radical having 3-5 C-atoms, an aralkyl radical having 7-12 C-atoms, --CH 2 --CH 2 --CN, --CH 2 --CH 2 --COO--alkyl, --CH 2 --CH 2 (CH 3 )--COO-alkyl an acyl radical or --(CH 2 --CH 2 O) n H, wherein n is 1-10 are stabilizers for synthetic resins especially for polyolefins.
Inventors
- 👤 Heike Kelkenberg
- 👤 Elmar Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A cyclic imide of the formula: ##STR5## wherein R is a saturated or unsaturated, optionally alkyl- or alkenyl-substituted alkylene or cycloalkylene radical having 2-120 C-atoms and R' is selected from the group consisting of hydrogen, an alkyl radical having 1-20 C-atoms, an alkenyl radical having 3-5 C-atoms, an aralkyl radical having 7-12 C-atoms, --CH 2 --CH 2 --CN, --CH 2 --CH 2 --COO--alkyl, --CH 2 --CH(CH 3 )--COO--alkyl, an acyl radical or --(CH 2 --CH 2 O) n H, wherein n is 1-10.
Claim 2
Dependent Claim
83 words
A cyclic imide of the formula: ##STR5## wherein R is a saturated or unsaturated, optionally alkyl- or alkenyl-substituted alkylene or cycloalkylene radical having 2-120 C-atoms and R' is selected from the group consisting of hydrogen, an alkyl radical having 1-20 C-atoms, an alkenyl radical having 3-5 C-atoms, an aralkyl radical having 7-12 C-atoms, --CH 2 --CH 2 --CN, --CH 2 --CH 2 --COO--alkyl, --CH 2 --CH(CH 3 )--COO--alkyl, an acyl radical or --(CH 2 --CH 2 O) n H, wherein n is 1-10.
Claim 3
Dependent Claim
22 words
The cyclic imide of claim 1, wherein R has the formula ##STR6## wherein R" is a C 12 -C 18 alkyl group.
Claim 4
Dependent Claim
12 words
The cyclic imide of claim 1, wherein R is a cycloalkylene group.
Claim 5
Dependent Claim
20 words
The cyclic imide of claim 1, wherein R is selected from the group consisting of 1,2-cyclohexanediyl and methyl-substituted 1,2-cyclohexanediyl radicals.
Claim 6
Dependent Claim
14 words
The cyclic imide of claim 1, wherein R is a bicyclic divalent aliphatic radical.
References Cited (Backward Citations)
US4053615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |