Patent US4520146A successfully refreshed from Google Patents.
US4520146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical compounds and use
Assignee: Canusa Coating Systems Ltd
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Filing: 1983-09-27
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Granted: 1985-05-28
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Expires: 2003-09-27
Abstract
Abstract ##STR1## where X is 1, 2 or 3; Y is Cl or Br; R 1 is tert-butyl (t-butyl) and R 2 is H or lower alkyl of 1 to 4 carbons. The preferred group of compounds is where OH is at the 4 position, R 1 is at the 3 position and R 2 is at the 5 position of the phenyl ring. The most preferred compound is where X is 2, R 1 and R 2 are both t-butyl at the 3 and 5 positions of the phenyl ring and OH is at the 4 position of the phenyl ring and Y is Br. The compounds are useful as antioxidants and flame retardants.
Inventors
- 👤 Ralph H. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:24
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
36 words
The compound of the formula I ##STR3## where X is 1, 2 or 3; Y is Cl or Br; R 1 is tert-butyl and R 2 is H or lower alkyl of 1 to 4 carbons.
Claim 2
Dependent Claim
36 words
The compound of the formula I ##STR3## where X is 1, 2 or 3; Y is Cl or Br; R 1 is tert-butyl and R 2 is H or lower alkyl of 1 to 4 carbons.
Claim 3
Dependent Claim
31 words
The compound of claim 1 where OH is at the 4 position, R 1 is at the 3 position and R 2 is at the 5 position of the phenyl ring.
Claim 4
Dependent Claim
24 words
A composition comprising a polymer and the compound of claim 1 or 2 in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 5
Dependent Claim
25 words
A composition comprising a polyolefin polymer and the compound of claim 1 or 2 in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 6
Dependent Claim
24 words
A heat shrinkable article comprising a polymer and the compound of claim 1 in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 7
Dependent Claim
27 words
The composition of claim 3 in which the amount of the compound of formula (I) is about 0.05 to 150% based on the weight of the polymer.
Claim 8
Dependent Claim
27 words
A heat shrinkable article comprising polyethylene crosslinked with vinyl trimethoxysilane and the compound of claim 1 in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 9
Dependent Claim
3 words
The compound ##STR4##
Claim 10
Dependent Claim
3 words
The compound ##STR4##
Claim 11
Dependent Claim
22 words
A composition comprising the compound of claim 8 in a polymer in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 12
Dependent Claim
24 words
A composition comprising the compound of claim 8 in a heat shrinkable polymer in an amount sufficient to impart flame retardant and antioxidant properties.
Claim 13
Dependent Claim
12 words
The composition of claim 9 in which the polymer is a polyolefin.
Claim 14
Dependent Claim
13 words
The composition of claim 11 in which the polyolefin is polyethylene or polypropylene.
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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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |